/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011, 2012, 2013, 2014 Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
/*
 * Copyright (C) 2011, 2012, 2013, 2014 Symisc Systems. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Redistributions in any form must be accompanied by information on
 *    how to obtain complete source code for the PH7 engine and any 
 *    accompanying software that uses the PH7 engine software.
 *    The source code must either be included in the distribution
 *    or be available for no more than the cost of distribution plus
 *    a nominal fee, and must be freely redistributable under reasonable
 *    conditions. For an executable file, complete source code means
 *    the source code for all modules it contains.It does not include
 *    source code for modules or files that typically accompany the major
 *    components of the operating system on which the executable file runs.
 *
 * THIS SOFTWARE IS PROVIDED BY SYMISC SYSTEMS ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT, ARE DISCLAIMED.  IN NO EVENT SHALL SYMISC SYSTEMS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 * $SymiscID: ph7.c v2.1 UNIX|WIN32/64 2012-09-15 09:00 stable <chm@symisc.net> $ 
 */
/* This file is an amalgamation of many separate C source files from PH7 version 2.1.
 * By combining all the individual C code files into this single large file, the entire code
 * can be compiled as a single translation unit.This allows many compilers to do optimization's
 * that would not be possible if the files were compiled separately.Performance improvements
 * are commonly seen when PH7 is compiled as a single translation unit.
 *
 * This file is all you need to compile PH7.To use PH7 in other programs, you need
 * this file and the "ph7.h" header file that defines the programming interface to the 
 * PH7 engine.(If you do not have the "ph7.h" header file at hand, you will find
 * a copy embedded within the text of this file.Search for "Header file: <ph7.h>" to find
 * the start of the embedded ph7.h header file.) Additional code files may be needed if
 * you want a wrapper to interface PH7 with your choice of programming language.
 * To get the official documentation,please visit http://ph7.symisc.net/
 */
 /*
  * Make the sure the following is defined in the amalgamation build
  */
 #ifndef PH7_AMALGAMATION
 #define PH7_AMALGAMATION
 #endif /* PH7_AMALGAMATION */
/*
 * Embedded header file for the PH7 engine: <ph7.h>
 */
/*
 * ----------------------------------------------------------
 * File: ph7.h
 * MD5: b5527f9c7eb410a9f9367a6b03014a65
 * ----------------------------------------------------------
 */
/* This file was automatically generated.  Do not edit (except for compile time directive)! */ 
#ifndef _PH7_H_
#define _PH7_H_
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
/*
 * Copyright (C) 2011, 2012 Symisc Systems. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Redistributions in any form must be accompanied by information on
 *    how to obtain complete source code for the PH7 engine and any 
 *    accompanying software that uses the PH7 engine software.
 *    The source code must either be included in the distribution
 *    or be available for no more than the cost of distribution plus
 *    a nominal fee, and must be freely redistributable under reasonable
 *    conditions. For an executable file, complete source code means
 *    the source code for all modules it contains.It does not include
 *    source code for modules or files that typically accompany the major
 *    components of the operating system on which the executable file runs.
 *
 * THIS SOFTWARE IS PROVIDED BY SYMISC SYSTEMS ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT, ARE DISCLAIMED.  IN NO EVENT SHALL SYMISC SYSTEMS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 /* $SymiscID: ph7.h v2.1 UNIX|WIN32/64 2012-09-15 09:43 stable <chm@symisc.net> $ */
#include <stdarg.h> /* needed for the definition of va_list */
/*
 * Compile time engine version, signature, identification in the symisc source tree
 * and copyright notice.
 * Each macro have an equivalent C interface associated with it that provide the same
 * information but are associated with the library instead of the header file.
 * Refer to [ph7_lib_version()], [ph7_lib_signature()], [ph7_lib_ident()] and
 * [ph7_lib_copyright()] for more information.
 */
/*
 * The PH7_VERSION C preprocessor macroevaluates to a string literal
 * that is the ph7 version in the format "X.Y.Z" where X is the major
 * version number and Y is the minor version number and Z is the release
 * number.
 */
#define PH7_VERSION "2.1.4"
/*
 * The PH7_VERSION_NUMBER C preprocessor macro resolves to an integer
 * with the value (X*1000000 + Y*1000 + Z) where X, Y, and Z are the same
 * numbers used in [PH7_VERSION].
 */
#define PH7_VERSION_NUMBER 2001004
/*
 * The PH7_SIG C preprocessor macro evaluates to a string
 * literal which is the public signature of the ph7 engine.
 * This signature could be included for example in a host-application
 * generated Server MIME header as follows:
 *   Server: YourWebServer/x.x PH7/x.x.x \r\n
 */
#define PH7_SIG "PH7/2.1.4"
/*
 * PH7 identification in the Symisc source tree:
 * Each particular check-in of a particular software released
 * by symisc systems have an unique identifier associated with it.
 * This macro hold the one associated with ph7.
 */
#define PH7_IDENT "ph7:c193f4d8a6b90ee60f9afad11840f1010054fdf9"
/*
 * Copyright notice.
 * If you have any questions about the licensing situation,please
 * visit http://ph7.symisc.net/licensing.html
 * or contact Symisc Systems via:
 *   legal@symisc.net
 *   licensing@symisc.net
 *   contact@symisc.net
 */
#define PH7_COPYRIGHT "Copyright (C) Symisc Systems 2011-2012, http://ph7.symisc.net/"
/* Make sure we can call this stuff from C++ */
#ifdef __cplusplus
extern "C" { 
#endif
/* Forward declaration to public objects */
typedef struct ph7_io_stream ph7_io_stream;
typedef struct ph7_context ph7_context;
typedef struct ph7_value ph7_value;
typedef struct ph7_vfs ph7_vfs;
typedef struct ph7_vm ph7_vm;
typedef struct ph7 ph7;
/*
 * ------------------------------
 * Compile time directives
 * ------------------------------
 * For most purposes, PH7 can be built just fine using the default compilation options.
 * However, if required, the compile-time options documented below can be used to omit
 * PH7 features (resulting in a smaller compiled library size) or to change the default
 * values of some parameters. 
 * Every effort has been made to ensure that the various combinations of compilation 
 * options work harmoniously and produce a working library.
 *
 * PH7_ENABLE_THREADS
 *   This option controls whether or not code is included in PH7 to enable it to operate
 *   safely in a multithreaded environment. The default is not. That is,all mutexing code
 *   is omitted and it is unsafe to use PH7 in a multithreaded program. When compiled
 *   with the PH7_ENABLE_THREADS directive enabled, PH7 can be used in a multithreaded
 *   program and it's safe to share the same virtual machine and engine instance between
 *   two or more threads.
 *   The value of PH7_ENABLE_THREADS can be determined at run-time using the
 *   ph7_lib_is_threadsafe() interface.When PH7 has been compiled with PH7_ENABLE_THREAD
 *   then the threading mode can be altered at run-time using the ph7_lib_config()
 *   interface together with one of these verbs:
 *      PH7_LIB_CONFIG_THREAD_LEVEL_SINGLE
 *      PH7_LIB_CONFIG_THREAD_LEVEL_MULTI
 *   Also note,platforms others than Windows and UNIX systems must install their own
 *   mutex subsystem via  ph7_lib_config() with a configuration verb set to
 *   PH7_LIB_CONFIG_USER_MUTEX. Otherwise the library is not threadsafe.
 *   Note that you must link PH7 with the POSIX threads library under UNIX-like systems
 *   (i.e: -lpthread).Otherwise you will get a link time error.
 * Options To Omit/Enable Features:
 *   The following options can be used to reduce the size of the compiled library
 *   by omitting optional features. This is probably only useful in embedded systems
 *   where space is especially tight, as even with all features included the PH7 library
 *   is relatively small. Don't forget to tell your compiler to optimize for binary
 *   size! (the -Os option if using GCC).
 *   Telling your compiler to optimize for size usually has a much larger impact
 *   on library footprint than employing any of these compile-time options.
 *   PH7_DISABLE_BUILTIN_FUNC
 *     PH7 come with more than 460 built-in functions suitable for most purposes ranging
 *     from string/XML/INI processing to ZIP extracting, Base64 encoding/decoding and so on.
 *     If this directive is enabled, all the built-in functions are omitted from the build.
 *     Note that language construct functions such as is_int(), is_string(), func_get_arg(),
 *     define(), etc. are not omitted from the build and are not affected by this directive.
 *   PH7_ENABLE_MATH_FUNC
 *     If this directive is enabled, built-in math functions such as sqrt(),abs(),
 *     log(), ceil(), etc. are included in the build. Note that you may need to link
 *     PH7 with the math library in same linux/BSD flavor (i.e: -lm).Otherwise you
 *     will get a link time error.
 *  PH7_DISABLE_DISK_IO
 *     If this directive is enabled, built-in Virtual File System functions such as
 *     chdir(), mkdir(), chroot(), unlink(), delete(), etc. are omitted from the build.
 *  PH7_DISABLE_HASH_IO
 *     If this directive is enabled, built-in hash functions such as md5(), sha1(),
 *     md5_file(), crc32(), etc. are omitted from the build.
 *  PH7_OMIT_FLOATING_POINT
 *     This option is used to omit floating-point number support from the PH7 library
 *     if compiling for a processor that lacks floating point support. When specified
 *     the library will substitute 64-bit integer arithmetic for floating-point which
 *     mean that 25.e-3 and 25 are equals and are of type integer.
 */
/* Symisc public definitions */
#if !defined(SYMISC_STANDARD_DEFS)
#define SYMISC_STANDARD_DEFS
#if defined (_WIN32) || defined (WIN32) || defined(__MINGW32__) || defined (_MSC_VER) || defined (_WIN32_WCE)
/* Windows Systems */
#if !defined(__WINNT__)
#define __WINNT__
#endif 
#else
/*
 * By default we will assume that we are compiling on a UNIX systems.
 * Otherwise the OS_OTHER directive must be defined.
 */
#if !defined(OS_OTHER)
#if !defined(__UNIXES__)
#define __UNIXES__
#endif /* __UNIXES__ */
#else
#endif /* OS_OTHER */
#endif /* __WINNT__/__UNIXES__ */
#if defined(_MSC_VER) || defined(__BORLANDC__)
typedef signed __int64     sxi64; /* 64 bits(8 bytes) signed int64 */
typedef unsigned __int64   sxu64; /* 64 bits(8 bytes) unsigned int64 */
#else
typedef signed long long int   sxi64; /* 64 bits(8 bytes) signed int64 */
typedef unsigned long long int sxu64; /* 64 bits(8 bytes) unsigned int64 */
#endif /* _MSC_VER */
/* Signature of the consumer routine */
typedef int (*ProcConsumer)(const void *,unsigned int,void *);
/* Forward reference */
typedef struct SyMutexMethods SyMutexMethods;
typedef struct SyMemMethods SyMemMethods;
typedef struct SyString SyString;
typedef struct syiovec syiovec;
typedef struct SyMutex SyMutex;
typedef struct Sytm Sytm;
/* Scatter and gather array. */
struct syiovec
{
#if defined (__WINNT__)
	/* Same fields type and offset as WSABUF structure defined one winsock2 header */
	unsigned long nLen;
	char *pBase;
#else
	void *pBase;
	unsigned long nLen;
#endif
};
struct SyString
{
	const char *zString;  /* Raw string (may not be null terminated) */
	unsigned int nByte;   /* Raw string length */
};
/* Time structure. */
struct Sytm
{
  int tm_sec;     /* seconds (0 - 60) */
  int tm_min;     /* minutes (0 - 59) */
  int tm_hour;    /* hours (0 - 23) */
  int tm_mday;    /* day of month (1 - 31) */
  int tm_mon;     /* month of year (0 - 11) */
  int tm_year;    /* year + 1900 */
  int tm_wday;    /* day of week (Sunday = 0) */
  int tm_yday;    /* day of year (0 - 365) */
  int tm_isdst;   /* is summer time in effect? */
  char *tm_zone;  /* abbreviation of timezone name */
  long tm_gmtoff; /* offset from UTC in seconds */
};
/* Convert a tm structure (struct tm *) found in <time.h> to a Sytm structure */
#define STRUCT_TM_TO_SYTM(pTM,pSYTM) \
	(pSYTM)->tm_hour = (pTM)->tm_hour;\
	(pSYTM)->tm_min	 = (pTM)->tm_min;\
	(pSYTM)->tm_sec	 = (pTM)->tm_sec;\
	(pSYTM)->tm_mon	 = (pTM)->tm_mon;\
	(pSYTM)->tm_mday = (pTM)->tm_mday;\
	(pSYTM)->tm_year = (pTM)->tm_year + 1900;\
	(pSYTM)->tm_yday = (pTM)->tm_yday;\
	(pSYTM)->tm_wday = (pTM)->tm_wday;\
	(pSYTM)->tm_isdst = (pTM)->tm_isdst;\
	(pSYTM)->tm_gmtoff = 0;\
	(pSYTM)->tm_zone = 0;

/* Convert a SYSTEMTIME structure (LPSYSTEMTIME: Windows Systems only ) to a Sytm structure */
#define SYSTEMTIME_TO_SYTM(pSYSTIME,pSYTM) \
	 (pSYTM)->tm_hour = (pSYSTIME)->wHour;\
	 (pSYTM)->tm_min  = (pSYSTIME)->wMinute;\
	 (pSYTM)->tm_sec  = (pSYSTIME)->wSecond;\
	 (pSYTM)->tm_mon  = (pSYSTIME)->wMonth - 1;\
	 (pSYTM)->tm_mday = (pSYSTIME)->wDay;\
	 (pSYTM)->tm_year = (pSYSTIME)->wYear;\
	 (pSYTM)->tm_yday = 0;\
	 (pSYTM)->tm_wday = (pSYSTIME)->wDayOfWeek;\
	 (pSYTM)->tm_gmtoff = 0;\
	 (pSYTM)->tm_isdst = -1;\
	 (pSYTM)->tm_zone = 0;

/* Dynamic memory allocation methods. */
struct SyMemMethods 
{
	void * (*xAlloc)(unsigned int);          /* [Required:] Allocate a memory chunk */
	void * (*xRealloc)(void *,unsigned int); /* [Required:] Re-allocate a memory chunk */
	void   (*xFree)(void *);                 /* [Required:] Release a memory chunk */
	unsigned int  (*xChunkSize)(void *);     /* [Optional:] Return chunk size */
	int    (*xInit)(void *);                 /* [Optional:] Initialization callback */
	void   (*xRelease)(void *);              /* [Optional:] Release callback */
	void  *pUserData;                        /* [Optional:] First argument to xInit() and xRelease() */
};
/* Out of memory callback signature. */
typedef int (*ProcMemError)(void *);
/* Mutex methods. */
struct SyMutexMethods 
{
	int (*xGlobalInit)(void);		/* [Optional:] Global mutex initialization */
	void  (*xGlobalRelease)(void);	/* [Optional:] Global Release callback () */
	SyMutex * (*xNew)(int);	        /* [Required:] Request a new mutex */
	void  (*xRelease)(SyMutex *);	/* [Optional:] Release a mutex  */
	void  (*xEnter)(SyMutex *);	    /* [Required:] Enter mutex */
	int (*xTryEnter)(SyMutex *);    /* [Optional:] Try to enter a mutex */
	void  (*xLeave)(SyMutex *);	    /* [Required:] Leave a locked mutex */
};
#if defined (_MSC_VER) || defined (__MINGW32__) ||  defined (__GNUC__) && defined (__declspec)
#define SX_APIIMPORT	__declspec(dllimport)
#define SX_APIEXPORT	__declspec(dllexport)
#else
#define	SX_APIIMPORT
#define	SX_APIEXPORT
#endif
/* Standard return values from Symisc public interfaces */
#define SXRET_OK       0      /* Not an error */	
#define SXERR_MEM      (-1)   /* Out of memory */
#define SXERR_IO       (-2)   /* IO error */
#define SXERR_EMPTY    (-3)   /* Empty field */
#define SXERR_LOCKED   (-4)   /* Locked operation */
#define SXERR_ORANGE   (-5)   /* Out of range value */
#define SXERR_NOTFOUND (-6)   /* Item not found */
#define SXERR_LIMIT    (-7)   /* Limit reached */
#define SXERR_MORE     (-8)   /* Need more input */
#define SXERR_INVALID  (-9)   /* Invalid parameter */
#define SXERR_ABORT    (-10)  /* User callback request an operation abort */
#define SXERR_EXISTS   (-11)  /* Item exists */
#define SXERR_SYNTAX   (-12)  /* Syntax error */
#define SXERR_UNKNOWN  (-13)  /* Unknown error */
#define SXERR_BUSY     (-14)  /* Busy operation */
#define SXERR_OVERFLOW (-15)  /* Stack or buffer overflow */
#define SXERR_WILLBLOCK (-16) /* Operation will block */
#define SXERR_NOTIMPLEMENTED  (-17) /* Operation not implemented */
#define SXERR_EOF      (-18) /* End of input */
#define SXERR_PERM     (-19) /* Permission error */
#define SXERR_NOOP     (-20) /* No-op */	
#define SXERR_FORMAT   (-21) /* Invalid format */
#define SXERR_NEXT     (-22) /* Not an error */
#define SXERR_OS       (-23) /* System call return an error */
#define SXERR_CORRUPT  (-24) /* Corrupted pointer */
#define SXERR_CONTINUE (-25) /* Not an error: Operation in progress */
#define SXERR_NOMATCH  (-26) /* No match */
#define SXERR_RESET    (-27) /* Operation reset */
#define SXERR_DONE     (-28) /* Not an error */
#define SXERR_SHORT    (-29) /* Buffer too short */
#define SXERR_PATH     (-30) /* Path error */
#define SXERR_TIMEOUT  (-31) /* Timeout */
#define SXERR_BIG      (-32) /* Too big for processing */
#define SXERR_RETRY    (-33) /* Retry your call */
#define SXERR_IGNORE   (-63) /* Ignore */
#endif /* SYMISC_PUBLIC_DEFS */
/* Standard PH7 return values */
#define PH7_OK      SXRET_OK      /* Successful result */
/* beginning-of-error-codes */
#define PH7_NOMEM   SXERR_MEM     /* Out of memory */
#define PH7_ABORT   SXERR_ABORT   /* Foreign Function request operation abort/Another thread have released this instance */
#define PH7_IO_ERR  SXERR_IO      /* IO error */
#define PH7_CORRUPT SXERR_CORRUPT /* Corrupt pointer/Unknown configuration option */
#define PH7_LOOKED  SXERR_LOCKED  /* Forbidden Operation */ 
#define PH7_COMPILE_ERR (-70)     /* Compilation error */
#define PH7_VM_ERR      (-71)     /* Virtual machine error */
/* end-of-error-codes */
/*
 * If compiling for a processor that lacks floating point
 * support, substitute integer for floating-point.
 */
#ifdef PH7_OMIT_FLOATING_POINT
typedef sxi64 ph7_real;
#else
typedef double ph7_real;
#endif
typedef sxi64 ph7_int64;
#define PH7_APIEXPORT SX_APIEXPORT
/*
 * Engine Configuration Commands.
 *
 * The following set of constants are the available configuration verbs that can
 * be used by the host-application to configure the PH7 engine.
 * These constants must be passed as the second argument to the [ph7_config()] 
 * interface.
 * Each options require a variable number of arguments.
 * The [ph7_config()] interface will return PH7_OK on success, any other
 * return value indicates failure.
 * For a full discussion on the configuration verbs and their expected 
 * parameters, please refer to this page:
 *      http://ph7.symisc.net/c_api_func.html#ph7_config
 */
#define PH7_CONFIG_ERR_OUTPUT    1  /* TWO ARGUMENTS: int (*xConsumer)(const void *pOut,unsigned int nLen,void *pUserData),void *pUserData */
#define PH7_CONFIG_ERR_ABORT     2  /* RESERVED FOR FUTURE USE */
#define PH7_CONFIG_ERR_LOG       3  /* TWO ARGUMENTS: const char **pzBuf,int *pLen */
/*
 * Virtual Machine Configuration Commands.
 *
 * The following set of constants are the available configuration verbs that can
 * be used by the host-application to configure the PH7 Virtual machine.
 * These constants must be passed as the second argument to the [ph7_vm_config()] 
 * interface.
 * Each options require a variable number of arguments.
 * The [ph7_vm_config()] interface will return PH7_OK on success, any other return
 * value indicates failure.
 * There are many options but the most importants are: PH7_VM_CONFIG_OUTPUT which install
 * a VM output consumer callback, PH7_VM_CONFIG_HTTP_REQUEST which parse and register
 * a HTTP request and PH7_VM_CONFIG_ARGV_ENTRY which populate the $argv array.
 * For a full discussion on the configuration verbs and their expected parameters, please
 * refer to this page:
 *      http://ph7.symisc.net/c_api_func.html#ph7_vm_config
 */
#define PH7_VM_CONFIG_OUTPUT           1  /* TWO ARGUMENTS: int (*xConsumer)(const void *pOut,unsigned int nLen,void *pUserData),void *pUserData */
#define PH7_VM_CONFIG_IMPORT_PATH      3  /* ONE ARGUMENT: const char *zIncludePath */
#define PH7_VM_CONFIG_ERR_REPORT       4  /* NO ARGUMENTS: Report all run-time errors in the VM output */
#define PH7_VM_CONFIG_RECURSION_DEPTH  5  /* ONE ARGUMENT: int nMaxDepth */
#define PH7_VM_OUTPUT_LENGTH           6  /* ONE ARGUMENT: unsigned int *pLength */
#define PH7_VM_CONFIG_CREATE_SUPER     7  /* TWO ARGUMENTS: const char *zName,ph7_value *pValue */
#define PH7_VM_CONFIG_CREATE_VAR       8  /* TWO ARGUMENTS: const char *zName,ph7_value *pValue */
#define PH7_VM_CONFIG_HTTP_REQUEST     9  /* TWO ARGUMENTS: const char *zRawRequest,int nRequestLength */
#define PH7_VM_CONFIG_SERVER_ATTR     10  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_ENV_ATTR        11  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_SESSION_ATTR    12  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_POST_ATTR       13  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_GET_ATTR        14  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_COOKIE_ATTR     15  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_HEADER_ATTR     16  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
#define PH7_VM_CONFIG_EXEC_VALUE      17  /* ONE ARGUMENT: ph7_value **ppValue */
#define PH7_VM_CONFIG_IO_STREAM       18  /* ONE ARGUMENT: const ph7_io_stream *pStream */
#define PH7_VM_CONFIG_ARGV_ENTRY      19  /* ONE ARGUMENT: const char *zValue */
#define PH7_VM_CONFIG_EXTRACT_OUTPUT  20  /* TWO ARGUMENTS: const void **ppOut,unsigned int *pOutputLen */
#define PH7_VM_CONFIG_ERR_LOG_HANDLER 21  /* ONE ARGUMENT: void (*xErrLog)(const char *,int,const char *,const char *) */
/*
 * Global Library Configuration Commands.
 *
 * The following set of constants are the available configuration verbs that can
 * be used by the host-application to configure the whole library.
 * These constants must be passed as the first argument to the [ph7_lib_config()] 
 * interface.
 * Each options require a variable number of arguments.
 * The [ph7_lib_config()] interface will return PH7_OK on success, any other return
 * value indicates failure.
 * Notes:
 * The default configuration is recommended for most applications and so the call to
 * [ph7_lib_config()] is usually not necessary. It is provided to support rare 
 * applications with unusual needs. 
 * The [ph7_lib_config()] interface is not threadsafe. The application must insure that
 * no other [ph7_*()] interfaces are invoked by other threads while [ph7_lib_config()]
 * is running. Furthermore, [ph7_lib_config()] may only be invoked prior to library
 * initialization using [ph7_lib_init()] or [ph7_init()] or after shutdown
 * by [ph7_lib_shutdown()]. If [ph7_lib_config()] is called after [ph7_lib_init()]
 * or [ph7_init()] and before [ph7_lib_shutdown()] then it will return PH7_LOCKED.
 * Refer to the official documentation for more information on the configuration verbs
 * and their expected parameters.
 * For a full discussion on the configuration verbs and their expected parameters,please
 * refer to this page:
 *      http://ph7.symisc.net/c_api_func.html#Global_Library_Management_Interfaces
 */
#define PH7_LIB_CONFIG_USER_MALLOC            1 /* ONE ARGUMENT: const SyMemMethods *pMemMethods */ 
#define PH7_LIB_CONFIG_MEM_ERR_CALLBACK       2 /* TWO ARGUMENTS: int (*xMemError)(void *),void *pUserData */
#define PH7_LIB_CONFIG_USER_MUTEX             3 /* ONE ARGUMENT: const SyMutexMethods *pMutexMethods */ 
#define PH7_LIB_CONFIG_THREAD_LEVEL_SINGLE    4 /* NO ARGUMENTS */ 
#define PH7_LIB_CONFIG_THREAD_LEVEL_MULTI     5 /* NO ARGUMENTS */ 
#define PH7_LIB_CONFIG_VFS                    6 /* ONE ARGUMENT: const ph7_vfs *pVfs */
/*
 * Compile-time flags.
 * The new compile interfaces [ph7_compile_v2()] and [ph7_compile_file()] takes
 * as their last argument zero or more combination of compile time flags.
 * These flags are used to control the behavior of the PH7 compiler while
 * processing the input.
 * Refer to the official documentation for additional information.
 */
#define PH7_PHP_ONLY 0x01 /* If this flag is set then the code to compile is assumed
                           * to be plain PHP only. That is, there is no need to delimit
						   * the PHP code using the standard tags such as <?php ?> or <? ?>.
						   * Everything will pass through the PH7 compiler.
						   */
#define PH7_PHP_EXPR 0x02 /* This flag is reserved for future use. */
/*
 * Call Context Error Message Serverity Level.
 *
 * The following constans are the allowed severity level that can
 * passed as the second argument to the [ph7_context_throw_error()] or
 * [ph7_context_throw_error_format()] interfaces.
 * Refer to the official documentation for additional information.
 */
#define PH7_CTX_ERR      1 /* Call context error such as unexpected number of arguments,invalid types and so on. */
#define PH7_CTX_WARNING  2 /* Call context Warning */
#define PH7_CTX_NOTICE   3 /* Call context Notice */
/* Current VFS structure version*/
#define PH7_VFS_VERSION 2 
/* 
 * PH7 Virtual File System (VFS).
 *
 * An instance of the ph7_vfs object defines the interface between the PH7 core
 * and the underlying operating system. The "vfs" in the name of the object stands
 * for "virtual file system". The vfs is used to implement PHP system functions
 * such as mkdir(), chdir(), stat(), get_user_name() and many more.
 * The value of the iVersion field is initially 2 but may be larger in future versions
 * of PH7.
 * Additional fields may be appended to this object when the iVersion value is increased.
 * Only a single vfs can be registered within the PH7 core. Vfs registration is done
 * using the ph7_lib_config() interface with a configuration verb set to PH7_LIB_CONFIG_VFS.
 * Note that Windows and UNIX (Linux, FreeBSD, Solaris, Mac OS X, etc.) users does not have to
 * worry about registering and installing a vfs since PH7 come with a built-in vfs for these
 * platforms which implement most the methods defined below.
 * Host-application running on exotic systems (ie: Other than Windows and UNIX systems) must
 * register their own vfs in order to be able to use and call PHP system function.
 * Also note that the ph7_compile_file() interface depend on the xMmap() method of the underlying
 * vfs which mean that this method must be available (Always the case using the built-in VFS)
 * in order to use this interface.
 * Developers wishing to implement the vfs methods can contact symisc systems to obtain
 * the PH7 VFS C/C++ Specification manual.
 */
struct ph7_vfs
{
	const char *zName;  /* Underlying VFS name [i.e: FreeBSD/Linux/Windows...] */
	int iVersion;       /* Current VFS structure version [default 2] */
	/* Directory functions */
	int (*xChdir)(const char *);                     /* Change directory */
	int (*xChroot)(const char *);                    /* Change the root directory */
	int (*xGetcwd)(ph7_context *);                   /* Get the current working directory */
	int (*xMkdir)(const char *,int,int);             /* Make directory */
	int (*xRmdir)(const char *);                     /* Remove directory */
	int (*xIsdir)(const char *);                     /* Tells whether the filename is a directory */
	int (*xRename)(const char *,const char *);       /* Renames a file or directory */
	int (*xRealpath)(const char *,ph7_context *);    /* Return canonicalized absolute pathname*/
	/* Systems functions */
	int (*xSleep)(unsigned int);                     /* Delay execution in microseconds */
	int (*xUnlink)(const char *);                    /* Deletes a file */
	int (*xFileExists)(const char *);                /* Checks whether a file or directory exists */
	int (*xChmod)(const char *,int);                 /* Changes file mode */
	int (*xChown)(const char *,const char *);        /* Changes file owner */
	int (*xChgrp)(const char *,const char *);        /* Changes file group */
	ph7_int64 (*xFreeSpace)(const char *);           /* Available space on filesystem or disk partition */
	ph7_int64 (*xTotalSpace)(const char *);          /* Total space on filesystem or disk partition */
	ph7_int64 (*xFileSize)(const char *);            /* Gets file size */
	ph7_int64 (*xFileAtime)(const char *);           /* Gets last access time of file */
	ph7_int64 (*xFileMtime)(const char *);           /* Gets file modification time */
	ph7_int64 (*xFileCtime)(const char *);           /* Gets inode change time of file */
	int (*xStat)(const char *,ph7_value *,ph7_value *);   /* Gives information about a file */
	int (*xlStat)(const char *,ph7_value *,ph7_value *);  /* Gives information about a file */
	int (*xIsfile)(const char *);                    /* Tells whether the filename is a regular file */
	int (*xIslink)(const char *);                    /* Tells whether the filename is a symbolic link */
	int (*xReadable)(const char *);                  /* Tells whether a file exists and is readable */
	int (*xWritable)(const char *);                  /* Tells whether the filename is writable */
	int (*xExecutable)(const char *);                /* Tells whether the filename is executable */
	int (*xFiletype)(const char *,ph7_context *);    /* Gets file type [i.e: fifo,dir,file..] */
	int (*xGetenv)(const char *,ph7_context *);      /* Gets the value of an environment variable */
	int (*xSetenv)(const char *,const char *);       /* Sets the value of an environment variable */
	int (*xTouch)(const char *,ph7_int64,ph7_int64); /* Sets access and modification time of file */
	int (*xMmap)(const char *,void **,ph7_int64 *);  /* Read-only memory map of the whole file */
	void (*xUnmap)(void *,ph7_int64);                /* Unmap a memory view */
	int (*xLink)(const char *,const char *,int);     /* Create hard or symbolic link */
	int (*xUmask)(int);                              /* Change the current umask */
	void (*xTempDir)(ph7_context *);                 /* Get path of the temporary directory */
	unsigned int (*xProcessId)(void);                /* Get running process ID */
	int (*xUid)(void);                               /* user ID of the process */
	int (*xGid)(void);                               /* group ID of the process */
	void (*xUsername)(ph7_context *);                /* Running username */
	int (*xExec)(const char *,ph7_context *);        /* Execute an external program */
};
/* Current PH7 IO stream structure version. */
#define PH7_IO_STREAM_VERSION 1 
/* 
 * Possible open mode flags that can be passed to the xOpen() routine
 * of the underlying IO stream device .
 * Refer to the PH7 IO Stream C/C++ specification manual (http://ph7.symisc.net/io_stream_spec.html)
 * for additional information.
 */
#define PH7_IO_OPEN_RDONLY   0x001  /* Read-only open */
#define PH7_IO_OPEN_WRONLY   0x002  /* Write-only open */
#define PH7_IO_OPEN_RDWR     0x004  /* Read-write open. */
#define PH7_IO_OPEN_CREATE   0x008  /* If the file does not exist it will be created */
#define PH7_IO_OPEN_TRUNC    0x010  /* Truncate the file to zero length */
#define PH7_IO_OPEN_APPEND   0x020  /* Append mode.The file offset is positioned at the end of the file */
#define PH7_IO_OPEN_EXCL     0x040  /* Ensure that this call creates the file,the file must not exist before */
#define PH7_IO_OPEN_BINARY   0x080  /* Simple hint: Data is binary */
#define PH7_IO_OPEN_TEMP     0x100  /* Simple hint: Temporary file */
#define PH7_IO_OPEN_TEXT     0x200  /* Simple hint: Data is textual */
/*
 * PH7 IO Stream Device.
 *
 * An instance of the ph7_io_stream object defines the interface between the PH7 core
 * and the underlying stream device.
 * A stream is a smart mechanism for generalizing file, network, data compression
 * and other IO operations which share a common set of functions using an abstracted
 * unified interface.
 * A stream device is additional code which tells the stream how to handle specific
 * protocols/encodings. For example, the http device knows how to translate a URL
 * into an HTTP/1.1 request for a file on a remote server.
 * PH7 come with two built-in IO streams device:
 * The file:// stream which perform very efficient disk IO and the php:// stream
 * which is a special stream that allow access various I/O streams (See the PHP official
 * documentation for more information on this stream).
 * A stream is referenced as: scheme://target 
 * scheme(string) - The name of the wrapper to be used. Examples include: file,http,https,ftp,
 * ftps, compress.zlib, compress.bz2, and php. If no wrapper is specified,the function default
 * is used (typically file://). 
 * target - Depends on the device used. For filesystem related streams this is typically a path
 * and filename of the desired file.For network related streams this is typically a hostname,often
 * with a path appended. 
 * IO stream devices are registered using a call to ph7_vm_config() with a configuration verb
 * set to PH7_VM_CONFIG_IO_STREAM.
 * Currently the PH7 development team is working on the implementation of the http:// and ftp://
 * IO stream protocols. These devices will be available in the next major release of the PH7 engine.
 * Developers wishing to implement their own IO stream devices must understand and follow
 * The PH7 IO Stream C/C++ specification manual (http://ph7.symisc.net/io_stream_spec.html).
 */
struct ph7_io_stream
{
	const char *zName;                                     /* Underlying stream name [i.e: file/http/zip/php,..] */
	int iVersion;                                          /* IO stream structure version [default 1]*/
	int  (*xOpen)(const char *,int,ph7_value *,void **);   /* Open handle*/
	int  (*xOpenDir)(const char *,ph7_value *,void **);    /* Open directory handle */
	void (*xClose)(void *);                                /* Close file handle */
	void (*xCloseDir)(void *);                             /* Close directory handle */
	ph7_int64 (*xRead)(void *,void *,ph7_int64);           /* Read from the open stream */         
	int (*xReadDir)(void *,ph7_context *);                 /* Read entry from directory handle */
	ph7_int64 (*xWrite)(void *,const void *,ph7_int64);    /* Write to the open stream */
	int (*xSeek)(void *,ph7_int64,int);                    /* Seek on the open stream */
	int (*xLock)(void *,int);                              /* Lock/Unlock the open stream */
	void (*xRewindDir)(void *);                            /* Rewind directory handle */
	ph7_int64 (*xTell)(void *);                            /* Current position of the stream  read/write pointer */
	int (*xTrunc)(void *,ph7_int64);                       /* Truncates the open stream to a given length */
	int (*xSync)(void *);                                  /* Flush open stream data */
	int (*xStat)(void *,ph7_value *,ph7_value *);          /* Stat an open stream handle */
};
/* 
 * C-API-REF: Please refer to the official documentation for interfaces
 * purpose and expected parameters. 
 */ 
/* Engine Handling Interfaces */
PH7_APIEXPORT int ph7_init(ph7 **ppEngine);
PH7_APIEXPORT int ph7_config(ph7 *pEngine,int nConfigOp,...);
PH7_APIEXPORT int ph7_release(ph7 *pEngine);
/* Compile Interfaces */
PH7_APIEXPORT int ph7_compile(ph7 *pEngine,const char *zSource,int nLen,ph7_vm **ppOutVm);
PH7_APIEXPORT int ph7_compile_v2(ph7 *pEngine,const char *zSource,int nLen,ph7_vm **ppOutVm,int iFlags);
PH7_APIEXPORT int ph7_compile_file(ph7 *pEngine,const char *zFilePath,ph7_vm **ppOutVm,int iFlags);
/* Virtual Machine Handling Interfaces */
PH7_APIEXPORT int ph7_vm_config(ph7_vm *pVm,int iConfigOp,...);
PH7_APIEXPORT int ph7_vm_exec(ph7_vm *pVm,int *pExitStatus);
PH7_APIEXPORT int ph7_vm_reset(ph7_vm *pVm);
PH7_APIEXPORT int ph7_vm_release(ph7_vm *pVm);
PH7_APIEXPORT int ph7_vm_dump_v2(ph7_vm *pVm,int (*xConsumer)(const void *,unsigned int,void *),void *pUserData);
/* In-process Extending Interfaces */
PH7_APIEXPORT int ph7_create_function(ph7_vm *pVm,const char *zName,int (*xFunc)(ph7_context *,int,ph7_value **),void *pUserData);
PH7_APIEXPORT int ph7_delete_function(ph7_vm *pVm,const char *zName);
PH7_APIEXPORT int ph7_create_constant(ph7_vm *pVm,const char *zName,void (*xExpand)(ph7_value *,void *),void *pUserData);
PH7_APIEXPORT int ph7_delete_constant(ph7_vm *pVm,const char *zName);
/* Foreign Function Parameter Values */
PH7_APIEXPORT int ph7_value_to_int(ph7_value *pValue);
PH7_APIEXPORT int ph7_value_to_bool(ph7_value *pValue);
PH7_APIEXPORT ph7_int64 ph7_value_to_int64(ph7_value *pValue);
PH7_APIEXPORT double ph7_value_to_double(ph7_value *pValue);
PH7_APIEXPORT const char * ph7_value_to_string(ph7_value *pValue,int *pLen);
PH7_APIEXPORT void * ph7_value_to_resource(ph7_value *pValue);
PH7_APIEXPORT int ph7_value_compare(ph7_value *pLeft,ph7_value *pRight,int bStrict);
/* Setting The Result Of A Foreign Function */
PH7_APIEXPORT int ph7_result_int(ph7_context *pCtx,int iValue);
PH7_APIEXPORT int ph7_result_int64(ph7_context *pCtx,ph7_int64 iValue);
PH7_APIEXPORT int ph7_result_bool(ph7_context *pCtx,int iBool);
PH7_APIEXPORT int ph7_result_double(ph7_context *pCtx,double Value);
PH7_APIEXPORT int ph7_result_null(ph7_context *pCtx);
PH7_APIEXPORT int ph7_result_string(ph7_context *pCtx,const char *zString,int nLen);
PH7_APIEXPORT int ph7_result_string_format(ph7_context *pCtx,const char *zFormat,...);
PH7_APIEXPORT int ph7_result_value(ph7_context *pCtx,ph7_value *pValue);
PH7_APIEXPORT int ph7_result_resource(ph7_context *pCtx,void *pUserData);
/* Call Context Handling Interfaces */
PH7_APIEXPORT int ph7_context_output(ph7_context *pCtx,const char *zString,int nLen);
PH7_APIEXPORT int ph7_context_output_format(ph7_context *pCtx,const char *zFormat,...);
PH7_APIEXPORT int ph7_context_throw_error(ph7_context *pCtx,int iErr,const char *zErr);
PH7_APIEXPORT int ph7_context_throw_error_format(ph7_context *pCtx,int iErr,const char *zFormat,...);
PH7_APIEXPORT unsigned int ph7_context_random_num(ph7_context *pCtx);
PH7_APIEXPORT int ph7_context_random_string(ph7_context *pCtx,char *zBuf,int nBuflen);
PH7_APIEXPORT void * ph7_context_user_data(ph7_context *pCtx);
PH7_APIEXPORT int    ph7_context_push_aux_data(ph7_context *pCtx,void *pUserData);
PH7_APIEXPORT void * ph7_context_peek_aux_data(ph7_context *pCtx);
PH7_APIEXPORT void * ph7_context_pop_aux_data(ph7_context *pCtx);
PH7_APIEXPORT unsigned int ph7_context_result_buf_length(ph7_context *pCtx);
PH7_APIEXPORT const char * ph7_function_name(ph7_context *pCtx);
/* Call Context Memory Management Interfaces */
PH7_APIEXPORT void * ph7_context_alloc_chunk(ph7_context *pCtx,unsigned int nByte,int ZeroChunk,int AutoRelease);
PH7_APIEXPORT void * ph7_context_realloc_chunk(ph7_context *pCtx,void *pChunk,unsigned int nByte);
PH7_APIEXPORT void ph7_context_free_chunk(ph7_context *pCtx,void *pChunk);
/* On Demand Dynamically Typed Value Object allocation interfaces */
PH7_APIEXPORT ph7_value * ph7_new_scalar(ph7_vm *pVm);
PH7_APIEXPORT ph7_value * ph7_new_array(ph7_vm *pVm);
PH7_APIEXPORT int ph7_release_value(ph7_vm *pVm,ph7_value *pValue);
PH7_APIEXPORT ph7_value * ph7_context_new_scalar(ph7_context *pCtx);
PH7_APIEXPORT ph7_value * ph7_context_new_array(ph7_context *pCtx);
PH7_APIEXPORT void ph7_context_release_value(ph7_context *pCtx,ph7_value *pValue);
/* Dynamically Typed Value Object Management Interfaces */
PH7_APIEXPORT int ph7_value_int(ph7_value *pVal,int iValue);
PH7_APIEXPORT int ph7_value_int64(ph7_value *pVal,ph7_int64 iValue);
PH7_APIEXPORT int ph7_value_bool(ph7_value *pVal,int iBool);
PH7_APIEXPORT int ph7_value_null(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_double(ph7_value *pVal,double Value);
PH7_APIEXPORT int ph7_value_string(ph7_value *pVal,const char *zString,int nLen);
PH7_APIEXPORT int ph7_value_string_format(ph7_value *pVal,const char *zFormat,...);
PH7_APIEXPORT int ph7_value_reset_string_cursor(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_resource(ph7_value *pVal,void *pUserData);
PH7_APIEXPORT int ph7_value_release(ph7_value *pVal);
PH7_APIEXPORT ph7_value * ph7_array_fetch(ph7_value *pArray,const char *zKey,int nByte);
PH7_APIEXPORT int ph7_array_walk(ph7_value *pArray,int (*xWalk)(ph7_value *,ph7_value *,void *),void *pUserData);
PH7_APIEXPORT int ph7_array_add_elem(ph7_value *pArray,ph7_value *pKey,ph7_value *pValue);
PH7_APIEXPORT int ph7_array_add_strkey_elem(ph7_value *pArray,const char *zKey,ph7_value *pValue);
PH7_APIEXPORT int ph7_array_add_intkey_elem(ph7_value *pArray,int iKey,ph7_value *pValue);
PH7_APIEXPORT unsigned int ph7_array_count(ph7_value *pArray);
PH7_APIEXPORT int ph7_object_walk(ph7_value *pObject,int (*xWalk)(const char *,ph7_value *,void *),void *pUserData);
PH7_APIEXPORT ph7_value * ph7_object_fetch_attr(ph7_value *pObject,const char *zAttr);
PH7_APIEXPORT const char * ph7_object_get_class_name(ph7_value *pObject,int *pLength);
PH7_APIEXPORT int ph7_value_is_int(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_float(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_bool(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_string(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_null(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_numeric(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_callable(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_scalar(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_array(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_object(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_resource(ph7_value *pVal);
PH7_APIEXPORT int ph7_value_is_empty(ph7_value *pVal);
/* Global Library Management Interfaces */
PH7_APIEXPORT int ph7_lib_init(void);
PH7_APIEXPORT int ph7_lib_config(int nConfigOp,...);
PH7_APIEXPORT int ph7_lib_shutdown(void);
PH7_APIEXPORT int ph7_lib_is_threadsafe(void);
PH7_APIEXPORT const char * ph7_lib_version(void);
PH7_APIEXPORT const char * ph7_lib_signature(void);
PH7_APIEXPORT const char * ph7_lib_ident(void);
PH7_APIEXPORT const char * ph7_lib_copyright(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _PH7_H_ */

/*
 * ----------------------------------------------------------
 * File: ph7int.h
 * MD5: cdd8bb8c737e7e3ae5b14e01a01b98dd
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: ph7int.h v1.9 FreeBSD 2012-08-13 26:25 devel <chm@symisc.net> $ */
#ifndef __PH7INT_H__
#define __PH7INT_H__
/* Internal interface definitions for PH7. */
#ifdef PH7_AMALGAMATION
/* Marker for routines not intended for external use */
#define PH7_PRIVATE static
#else
#define PH7_PRIVATE
#include "ph7.h"
#endif 
#ifndef PH7_PI
/* Value of PI */
#define PH7_PI 3.1415926535898
#endif
/*
 * Constants for the largest and smallest possible 64-bit signed integers.
 * These macros are designed to work correctly on both 32-bit and 64-bit
 * compilers.
 */
#ifndef LARGEST_INT64
#define LARGEST_INT64  (0xffffffff|(((sxi64)0x7fffffff)<<32))
#endif
#ifndef SMALLEST_INT64
#define SMALLEST_INT64 (((sxi64)-1) - LARGEST_INT64)
#endif
/* Forward declaration of private structures */
typedef struct ph7_class_instance ph7_class_instance;
typedef struct ph7_foreach_info   ph7_foreach_info;
typedef struct ph7_foreach_step   ph7_foreach_step;
typedef struct ph7_hashmap_node   ph7_hashmap_node;
typedef struct ph7_hashmap        ph7_hashmap;
typedef struct ph7_class          ph7_class;
/* Symisc Standard types */
#if !defined(SYMISC_STD_TYPES)
#define SYMISC_STD_TYPES
#ifdef __WINNT__
/* Disable nuisance warnings on Borland compilers */
#if defined(__BORLANDC__)
#pragma warn -rch /* unreachable code */
#pragma warn -ccc /* Condition is always true or false */
#pragma warn -aus /* Assigned value is never used */
#pragma warn -csu /* Comparing signed and unsigned */
#pragma warn -spa /* Suspicious pointer arithmetic */
#endif
#endif
typedef signed char        sxi8; /* signed char */
typedef unsigned char      sxu8; /* unsigned char */
typedef signed short int   sxi16; /* 16 bits(2 bytes) signed integer */
typedef unsigned short int sxu16; /* 16 bits(2 bytes) unsigned integer */
typedef int                sxi32; /* 32 bits(4 bytes) integer */
typedef unsigned int       sxu32; /* 32 bits(4 bytes) unsigned integer */
typedef long               sxptr;
typedef unsigned long      sxuptr;
typedef long               sxlong;
typedef unsigned long      sxulong;
typedef sxi32              sxofft;
typedef sxi64              sxofft64;
typedef long double	       sxlongreal;
typedef double             sxreal;
#define SXI8_HIGH       0x7F
#define SXU8_HIGH       0xFF
#define SXI16_HIGH      0x7FFF
#define SXU16_HIGH      0xFFFF
#define SXI32_HIGH      0x7FFFFFFF
#define SXU32_HIGH      0xFFFFFFFF
#define SXI64_HIGH      0x7FFFFFFFFFFFFFFF
#define SXU64_HIGH      0xFFFFFFFFFFFFFFFF 
#if !defined(TRUE)
#define TRUE 1
#endif
#if !defined(FALSE)
#define FALSE 0
#endif
/*
 * The following macros are used to cast pointers to integers and
 * integers to pointers.
 */
#if defined(__PTRDIFF_TYPE__)  
# define SX_INT_TO_PTR(X)  ((void*)(__PTRDIFF_TYPE__)(X))
# define SX_PTR_TO_INT(X)  ((int)(__PTRDIFF_TYPE__)(X))
#elif !defined(__GNUC__)    
# define SX_INT_TO_PTR(X)  ((void*)&((char*)0)[X])
# define SX_PTR_TO_INT(X)  ((int)(((char*)X)-(char*)0))
#else                       
# define SX_INT_TO_PTR(X)  ((void*)(X))
# define SX_PTR_TO_INT(X)  ((int)(X))
#endif
#define SXMIN(a,b)  ((a < b) ? (a) : (b))
#define SXMAX(a,b)  ((a < b) ? (b) : (a))
#endif /* SYMISC_STD_TYPES */
/* Symisc Run-time API private definitions */
#if !defined(SYMISC_PRIVATE_DEFS)
#define SYMISC_PRIVATE_DEFS

typedef sxi32 (*ProcRawStrCmp)(const SyString *,const SyString *);
#define SyStringData(RAW)	((RAW)->zString)
#define SyStringLength(RAW)	((RAW)->nByte)
#define SyStringInitFromBuf(RAW,ZBUF,NLEN){\
	(RAW)->zString 	= (const char *)ZBUF;\
	(RAW)->nByte	= (sxu32)(NLEN);\
}
#define SyStringUpdatePtr(RAW,NBYTES){\
	if( NBYTES > (RAW)->nByte ){\
		(RAW)->nByte = 0;\
	}else{\
		(RAW)->zString += NBYTES;\
		(RAW)->nByte -= NBYTES;\
	}\
}
#define SyStringDupPtr(RAW1,RAW2)\
	(RAW1)->zString = (RAW2)->zString;\
	(RAW1)->nByte = (RAW2)->nByte;

#define SyStringTrimLeadingChar(RAW,CHAR)\
	while((RAW)->nByte > 0 && (RAW)->zString[0] == CHAR ){\
			(RAW)->zString++;\
			(RAW)->nByte--;\
	}
#define SyStringTrimTrailingChar(RAW,CHAR)\
	while((RAW)->nByte > 0 && (RAW)->zString[(RAW)->nByte - 1] == CHAR){\
		(RAW)->nByte--;\
	}
#define SyStringCmp(RAW1,RAW2,xCMP)\
	(((RAW1)->nByte == (RAW2)->nByte) ? xCMP((RAW1)->zString,(RAW2)->zString,(RAW2)->nByte) : (sxi32)((RAW1)->nByte - (RAW2)->nByte))

#define SyStringCmp2(RAW1,RAW2,xCMP)\
	(((RAW1)->nByte >= (RAW2)->nByte) ? xCMP((RAW1)->zString,(RAW2)->zString,(RAW2)->nByte) : (sxi32)((RAW2)->nByte - (RAW1)->nByte))

#define SyStringCharCmp(RAW,CHAR) \
	(((RAW)->nByte == sizeof(char)) ? ((RAW)->zString[0] == CHAR ? 0 : CHAR - (RAW)->zString[0]) : ((RAW)->zString[0] == CHAR ? 0 : (RAW)->nByte - sizeof(char)))

#define SX_ADDR(PTR)    ((sxptr)PTR)
#define SX_ARRAYSIZE(X) (sizeof(X)/sizeof(X[0]))
#define SXUNUSED(P)	(P = 0)
#define	SX_EMPTY(PTR)   (PTR == 0)
#define SX_EMPTY_STR(STR) (STR == 0 || STR[0] == 0 )
typedef struct SyMemBackend SyMemBackend;
typedef struct SyBlob SyBlob;
typedef struct SySet SySet;
/* Standard function signatures */
typedef sxi32 (*ProcCmp)(const void *,const void *,sxu32);
typedef sxi32 (*ProcPatternMatch)(const char *,sxu32,const char *,sxu32,sxu32 *);
typedef sxi32 (*ProcSearch)(const void *,sxu32,const void *,sxu32,ProcCmp,sxu32 *);
typedef sxu32 (*ProcHash)(const void *,sxu32);
typedef sxi32 (*ProcHashSum)(const void *,sxu32,unsigned char *,sxu32);
typedef sxi32 (*ProcSort)(void *,sxu32,sxu32,ProcCmp);
#define MACRO_LIST_PUSH(Head,Item)\
	Item->pNext = Head;\
	Head = Item; 
#define MACRO_LD_PUSH(Head,Item)\
	if( Head == 0 ){\
		Head = Item;\
	}else{\
		Item->pNext = Head;\
		Head->pPrev = Item;\
		Head = Item;\
	}
#define MACRO_LD_REMOVE(Head,Item)\
	if( Head == Item ){\
		Head = Head->pNext;\
	}\
	if( Item->pPrev ){ Item->pPrev->pNext = Item->pNext;}\
	if( Item->pNext ){ Item->pNext->pPrev = Item->pPrev;}
/*
 * A generic dynamic set.
 */
struct SySet
{
	SyMemBackend *pAllocator; /* Memory backend */
	void *pBase;              /* Base pointer */	
	sxu32 nUsed;              /* Total number of used slots  */
	sxu32 nSize;              /* Total number of available slots */
	sxu32 eSize;              /* Size of a single slot */
	sxu32 nCursor;	          /* Loop cursor */	
	void *pUserData;          /* User private data associated with this container */
};
#define SySetBasePtr(S)           ((S)->pBase)
#define SySetBasePtrJump(S,OFFT)  (&((char *)(S)->pBase)[OFFT*(S)->eSize])
#define SySetUsed(S)              ((S)->nUsed)
#define SySetSize(S)              ((S)->nSize)
#define SySetElemSize(S)          ((S)->eSize) 
#define SySetCursor(S)            ((S)->nCursor)
#define SySetGetAllocator(S)      ((S)->pAllocator)
#define SySetSetUserData(S,DATA)  ((S)->pUserData = DATA)
#define SySetGetUserData(S)       ((S)->pUserData)
/*
 * A variable length containers for generic data.
 */
struct SyBlob
{
	SyMemBackend *pAllocator; /* Memory backend */
	void   *pBlob;	          /* Base pointer */
	sxu32  nByte;	          /* Total number of used bytes */
	sxu32  mByte;	          /* Total number of available bytes */
	sxu32  nFlags;	          /* Blob internal flags,see below */
};
#define SXBLOB_LOCKED	0x01	/* Blob is locked [i.e: Cannot auto grow] */
#define SXBLOB_STATIC	0x02	/* Not allocated from heap   */
#define SXBLOB_RDONLY   0x04    /* Read-Only data */

#define SyBlobFreeSpace(BLOB)	 ((BLOB)->mByte - (BLOB)->nByte)
#define SyBlobLength(BLOB)	     ((BLOB)->nByte)
#define SyBlobData(BLOB)	     ((BLOB)->pBlob)
#define SyBlobCurData(BLOB)	     ((void*)(&((char*)(BLOB)->pBlob)[(BLOB)->nByte]))
#define SyBlobDataAt(BLOB,OFFT)	 ((void *)(&((char *)(BLOB)->pBlob)[OFFT]))
#define SyBlobGetAllocator(BLOB) ((BLOB)->pAllocator)

#define SXMEM_POOL_INCR			3
#define SXMEM_POOL_NBUCKETS		12
#define SXMEM_BACKEND_MAGIC	0xBAC3E67D
#define SXMEM_BACKEND_CORRUPT(BACKEND)	(BACKEND == 0 || BACKEND->nMagic != SXMEM_BACKEND_MAGIC)

#define SXMEM_BACKEND_RETRY	3
/* A memory backend subsystem is defined by an instance of the following structures */
typedef union SyMemHeader SyMemHeader;
typedef struct SyMemBlock SyMemBlock;
struct SyMemBlock
{
	SyMemBlock *pNext,*pPrev; /* Chain of allocated memory blocks */
#ifdef UNTRUST
	sxu32 nGuard;             /* magic number associated with each valid block,so we
							   * can detect misuse.
							   */
#endif
};
/*
 * Header associated with each valid memory pool block.
 */
union SyMemHeader
{
	SyMemHeader *pNext; /* Next chunk of size 1 << (nBucket + SXMEM_POOL_INCR) in the list */
	sxu32 nBucket;      /* Bucket index in aPool[] */
};
struct SyMemBackend
{
	const SyMutexMethods *pMutexMethods; /* Mutex methods */
	const SyMemMethods *pMethods;  /* Memory allocation methods */
	SyMemBlock *pBlocks;           /* List of valid memory blocks */
	sxu32 nBlock;                  /* Total number of memory blocks allocated so far */
	ProcMemError xMemError;        /* Out-of memory callback */
	void *pUserData;               /* First arg to xMemError() */
	SyMutex *pMutex;               /* Per instance mutex */
	sxu32 nMagic;                  /* Sanity check against misuse */
	SyMemHeader *apPool[SXMEM_POOL_NBUCKETS+SXMEM_POOL_INCR]; /* Pool of memory chunks */
};
/* Mutex types */
#define SXMUTEX_TYPE_FAST	1
#define SXMUTEX_TYPE_RECURSIVE	2
#define SXMUTEX_TYPE_STATIC_1	3
#define SXMUTEX_TYPE_STATIC_2	4
#define SXMUTEX_TYPE_STATIC_3	5
#define SXMUTEX_TYPE_STATIC_4	6
#define SXMUTEX_TYPE_STATIC_5	7
#define SXMUTEX_TYPE_STATIC_6	8

#define SyMutexGlobalInit(METHOD){\
	if( (METHOD)->xGlobalInit ){\
	(METHOD)->xGlobalInit();\
	}\
}
#define SyMutexGlobalRelease(METHOD){\
	if( (METHOD)->xGlobalRelease ){\
	(METHOD)->xGlobalRelease();\
	}\
}
#define SyMutexNew(METHOD,TYPE)			(METHOD)->xNew(TYPE)
#define SyMutexRelease(METHOD,MUTEX){\
	if( MUTEX && (METHOD)->xRelease ){\
		(METHOD)->xRelease(MUTEX);\
	}\
}
#define SyMutexEnter(METHOD,MUTEX){\
	if( MUTEX ){\
	(METHOD)->xEnter(MUTEX);\
	}\
}
#define SyMutexTryEnter(METHOD,MUTEX){\
	if( MUTEX && (METHOD)->xTryEnter ){\
	(METHOD)->xTryEnter(MUTEX);\
	}\
}
#define SyMutexLeave(METHOD,MUTEX){\
	if( MUTEX ){\
	(METHOD)->xLeave(MUTEX);\
	}\
}
/* Comparison,byte swap,byte copy macros */
#define SX_MACRO_FAST_CMP(X1,X2,SIZE,RC){\
	register unsigned char *r1 = (unsigned char *)X1;\
	register unsigned char *r2 = (unsigned char *)X2;\
	register sxu32 LEN = SIZE;\
	for(;;){\
	  if( !LEN ){ break; }if( r1[0] != r2[0] ){ break; } r1++; r2++; LEN--;\
	  if( !LEN ){ break; }if( r1[0] != r2[0] ){ break; } r1++; r2++; LEN--;\
	  if( !LEN ){ break; }if( r1[0] != r2[0] ){ break; } r1++; r2++; LEN--;\
	  if( !LEN ){ break; }if( r1[0] != r2[0] ){ break; } r1++; r2++; LEN--;\
	}\
	RC = !LEN ? 0 : r1[0] - r2[0];\
}
#define	SX_MACRO_FAST_MEMCPY(SRC,DST,SIZ){\
	register unsigned char *xSrc = (unsigned char *)SRC;\
	register unsigned char *xDst = (unsigned char *)DST;\
	register sxu32 xLen = SIZ;\
	for(;;){\
	    if( !xLen ){ break; }xDst[0] = xSrc[0]; xDst++; xSrc++; --xLen;\
		if( !xLen ){ break; }xDst[0] = xSrc[0]; xDst++; xSrc++; --xLen;\
		if( !xLen ){ break; }xDst[0] = xSrc[0]; xDst++; xSrc++; --xLen;\
		if( !xLen ){ break; }xDst[0] = xSrc[0]; xDst++; xSrc++; --xLen;\
	}\
}
#define SX_MACRO_BYTE_SWAP(X,Y,Z){\
	register unsigned char *s = (unsigned char *)X;\
	register unsigned char *d = (unsigned char *)Y;\
	sxu32	ZLong = Z;  \
	sxi32 c; \
	for(;;){\
	  if(!ZLong){ break; } c = s[0] ; s[0] = d[0]; d[0] = (unsigned char)c; s++; d++; --ZLong;\
	  if(!ZLong){ break; } c = s[0] ; s[0] = d[0]; d[0] = (unsigned char)c; s++; d++; --ZLong;\
	  if(!ZLong){ break; } c = s[0] ; s[0] = d[0]; d[0] = (unsigned char)c; s++; d++; --ZLong;\
	  if(!ZLong){ break; } c = s[0] ; s[0] = d[0]; d[0] = (unsigned char)c; s++; d++; --ZLong;\
	}\
}
#define SX_MSEC_PER_SEC	(1000)			/* Millisec per seconds */
#define SX_USEC_PER_SEC	(1000000)		/* Microsec per seconds */
#define SX_NSEC_PER_SEC	(1000000000)	/* Nanosec per seconds */
#endif /* SYMISC_PRIVATE_DEFS */
/* Symisc Run-time API auxiliary definitions */
#if !defined(SYMISC_PRIVATE_AUX_DEFS)
#define SYMISC_PRIVATE_AUX_DEFS

typedef struct SyHashEntry_Pr SyHashEntry_Pr;
typedef struct SyHashEntry SyHashEntry;
typedef struct SyHash SyHash;
/*
 * Each public hashtable entry is represented by an instance
 * of the following structure.
 */
struct SyHashEntry
{
	const void *pKey; /* Hash key */
	sxu32 nKeyLen;    /* Key length */
	void *pUserData;  /* User private data */
};
#define SyHashEntryGetUserData(ENTRY) ((ENTRY)->pUserData)
#define SyHashEntryGetKey(ENTRY)      ((ENTRY)->pKey)
/* Each active hashtable is identified by an instance of the following structure */
struct SyHash
{
	SyMemBackend *pAllocator;         /* Memory backend */
	ProcHash xHash;                   /* Hash function */
	ProcCmp xCmp;                     /* Comparison function */
	SyHashEntry_Pr *pList,*pCurrent;  /* Linked list of hash entries user for linear traversal */
	sxu32 nEntry;                     /* Total number of entries */
	SyHashEntry_Pr **apBucket;        /* Hash buckets */
	sxu32 nBucketSize;                /* Current bucket size */
};
#define SXHASH_BUCKET_SIZE 16 /* Initial bucket size: must be a power of two */
#define SXHASH_FILL_FACTOR 3
/* Hash access macro */
#define SyHashFunc(HASH)		((HASH)->xHash)
#define SyHashCmpFunc(HASH)		((HASH)->xCmp)
#define SyHashTotalEntry(HASH)	((HASH)->nEntry)
#define SyHashGetPool(HASH)		((HASH)->pAllocator)
/*
 * An instance of the following structure define a single context
 * for an Pseudo Random Number Generator.
 *
 * Nothing in this file or anywhere else in the library does any kind of
 * encryption.  The RC4 algorithm is being used as a PRNG (pseudo-random
 * number generator) not as an encryption device.
 * This implementation is taken from the SQLite3 source tree.
 */
typedef struct SyPRNGCtx SyPRNGCtx;
struct SyPRNGCtx
{
    sxu8 i,j;				/* State variables */
    unsigned char s[256];   /* State variables */
	sxu16 nMagic;			/* Sanity check */
 };
typedef sxi32 (*ProcRandomSeed)(void *,unsigned int,void *);
/* High resolution timer.*/
typedef struct sytime sytime;
struct sytime
{
	long tm_sec;	/* seconds */
	long tm_usec;	/* microseconds */
};
/* Forward declaration */
typedef struct SyStream SyStream;
typedef struct SyToken  SyToken;
typedef struct SyLex    SyLex;
/*
 * Tokenizer callback signature.
 */
typedef sxi32 (*ProcTokenizer)(SyStream *,SyToken *,void *,void *);
/*
 * Each token in the input is represented by an instance
 * of the following structure.
 */
struct SyToken
{
	SyString sData;  /* Token text and length */
	sxu32 nType;     /* Token type */
	sxu32 nLine;     /* Token line number */
	void *pUserData; /* User private data associated with this token */
};
/*
 * During tokenization, information about the state of the input
 * stream is held in an instance of the following structure.
 */
struct SyStream
{
	const unsigned char *zInput; /* Complete text of the input */
	const unsigned char *zText; /* Current input we are processing */	
	const unsigned char *zEnd; /* End of input marker */
	sxu32  nLine; /* Total number of processed lines */
	sxu32  nIgn; /* Total number of ignored tokens */
	SySet *pSet; /* Token containers */
};
/*
 * Each lexer is represented by an instance of the following structure.
 */
struct SyLex
{
	SyStream sStream;         /* Input stream */
	ProcTokenizer xTokenizer; /* Tokenizer callback */
	void * pUserData;         /* Third argument to xTokenizer() */
	SySet *pTokenSet;         /* Token set */
};
#define SyLexTotalToken(LEX)    SySetTotalEntry(&(LEX)->aTokenSet)
#define SyLexTotalLines(LEX)    ((LEX)->sStream.nLine)
#define SyLexTotalIgnored(LEX)  ((LEX)->sStream.nIgn)
#define XLEX_IN_LEN(STREAM)     (sxu32)(STREAM->zEnd - STREAM->zText)
#endif /* SYMISC_PRIVATE_AUX_DEFS */
/*
** Notes on UTF-8 (According to SQLite3 authors):
**
**   Byte-0    Byte-1    Byte-2    Byte-3    Value
**  0xxxxxxx                                 00000000 00000000 0xxxxxxx
**  110yyyyy  10xxxxxx                       00000000 00000yyy yyxxxxxx
**  1110zzzz  10yyyyyy  10xxxxxx             00000000 zzzzyyyy yyxxxxxx
**  11110uuu  10uuzzzz  10yyyyyy  10xxxxxx   000uuuuu zzzzyyyy yyxxxxxx
**
*/
/*
** Assuming zIn points to the first byte of a UTF-8 character,
** advance zIn to point to the first byte of the next UTF-8 character.
*/
#define SX_JMP_UTF8(zIn,zEnd)\
	while(zIn < zEnd && (((unsigned char)zIn[0] & 0xc0) == 0x80) ){ zIn++; }
#define SX_WRITE_UTF8(zOut, c) {                       \
  if( c<0x00080 ){                                     \
    *zOut++ = (sxu8)(c&0xFF);                          \
  }else if( c<0x00800 ){                               \
    *zOut++ = 0xC0 + (sxu8)((c>>6)&0x1F);              \
    *zOut++ = 0x80 + (sxu8)(c & 0x3F);                 \
  }else if( c<0x10000 ){                               \
    *zOut++ = 0xE0 + (sxu8)((c>>12)&0x0F);             \
    *zOut++ = 0x80 + (sxu8)((c>>6) & 0x3F);            \
    *zOut++ = 0x80 + (sxu8)(c & 0x3F);                 \
  }else{                                               \
    *zOut++ = 0xF0 + (sxu8)((c>>18) & 0x07);           \
    *zOut++ = 0x80 + (sxu8)((c>>12) & 0x3F);           \
    *zOut++ = 0x80 + (sxu8)((c>>6) & 0x3F);            \
    *zOut++ = 0x80 + (sxu8)(c & 0x3F);                 \
  }                                                    \
}
/* Rely on the standard ctype */
#include <ctype.h>
#define SyToUpper(c) toupper(c) 
#define SyToLower(c) tolower(c) 
#define SyisUpper(c) isupper(c)
#define SyisLower(c) islower(c)
#define SyisSpace(c) isspace(c)
#define SyisBlank(c) isspace(c)
#define SyisAlpha(c) isalpha(c)
#define SyisDigit(c) isdigit(c)
#define SyisHex(c)	 isxdigit(c)
#define SyisPrint(c) isprint(c)
#define SyisPunct(c) ispunct(c)
#define SyisSpec(c)	 iscntrl(c)
#define SyisCtrl(c)	 iscntrl(c)
#define SyisAscii(c) isascii(c)
#define SyisAlphaNum(c) isalnum(c)
#define SyisGraph(c)     isgraph(c)
#define SyDigToHex(c)    "0123456789ABCDEF"[c & 0x0F] 		
#define SyDigToInt(c)     ((c < 0xc0 && SyisDigit(c))? (c - '0') : 0 )
#define SyCharToUpper(c)  ((c < 0xc0 && SyisLower(c))? SyToUpper(c) : c)
#define SyCharToLower(c)  ((c < 0xc0 && SyisUpper(c))? SyToLower(c) : c)
/* Remove white space/NUL byte from a raw string */
#define SyStringLeftTrim(RAW)\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[0] < 0xc0 && SyisSpace((RAW)->zString[0])){\
		(RAW)->nByte--;\
		(RAW)->zString++;\
	}
#define SyStringLeftTrimSafe(RAW)\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[0] < 0xc0 && ((RAW)->zString[0] == 0 || SyisSpace((RAW)->zString[0]))){\
		(RAW)->nByte--;\
		(RAW)->zString++;\
	}
#define SyStringRightTrim(RAW)\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[(RAW)->nByte - 1] < 0xc0  && SyisSpace((RAW)->zString[(RAW)->nByte - 1])){\
		(RAW)->nByte--;\
	}
#define SyStringRightTrimSafe(RAW)\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[(RAW)->nByte - 1] < 0xc0  && \
	(( RAW)->zString[(RAW)->nByte - 1] == 0 || SyisSpace((RAW)->zString[(RAW)->nByte - 1]))){\
		(RAW)->nByte--;\
	}

#define SyStringFullTrim(RAW)\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[0] < 0xc0  && SyisSpace((RAW)->zString[0])){\
		(RAW)->nByte--;\
		(RAW)->zString++;\
	}\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[(RAW)->nByte - 1] < 0xc0  && SyisSpace((RAW)->zString[(RAW)->nByte - 1])){\
		(RAW)->nByte--;\
	}
#define SyStringFullTrimSafe(RAW)\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[0] < 0xc0  && \
          ( (RAW)->zString[0] == 0 || SyisSpace((RAW)->zString[0]))){\
		(RAW)->nByte--;\
		(RAW)->zString++;\
	}\
	while((RAW)->nByte > 0 && (unsigned char)(RAW)->zString[(RAW)->nByte - 1] < 0xc0  && \
                   ( (RAW)->zString[(RAW)->nByte - 1] == 0 || SyisSpace((RAW)->zString[(RAW)->nByte - 1]))){\
		(RAW)->nByte--;\
	}
#ifndef PH7_DISABLE_BUILTIN_FUNC
/* 
 * An XML raw text,CDATA,tag name and son is parsed out and stored
 * in an instance of the following structure.
 */
typedef struct SyXMLRawStr SyXMLRawStr;
struct SyXMLRawStr
{
	const char *zString; /* Raw text [UTF-8 ENCODED EXCEPT CDATA] [NOT NULL TERMINATED] */
	sxu32 nByte; /* Text length */
	sxu32 nLine; /* Line number this text occurs */
};
/*
 * Event callback signatures.
 */
typedef sxi32 (*ProcXMLStartTagHandler)(SyXMLRawStr * ,SyXMLRawStr *,sxu32,SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLTextHandler)(SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLEndTagHandler)(SyXMLRawStr * ,SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLPIHandler)(SyXMLRawStr *,SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLDoctypeHandler)(SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLSyntaxErrorHandler)(const char *,int,SyToken *,void *);
typedef sxi32 (*ProcXMLStartDocument)(void *);
typedef sxi32 (*ProcXMLNameSpaceStart)(SyXMLRawStr *,SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLNameSpaceEnd)(SyXMLRawStr *,void *);
typedef sxi32 (*ProcXMLEndDocument)(void *);
/* XML processing control flags */
#define SXML_ENABLE_NAMESPACE	    0x01 /* Parse XML with namespace support enbaled */
#define SXML_ENABLE_QUERY		    0x02 /* Not used */	
#define SXML_OPTION_CASE_FOLDING    0x04 /* Controls whether case-folding is enabled for this XML parser */
#define SXML_OPTION_SKIP_TAGSTART   0x08 /* Specify how many characters should be skipped in the beginning of a tag name.*/
#define SXML_OPTION_SKIP_WHITE      0x10 /* Whether to skip values consisting of whitespace characters. */
#define SXML_OPTION_TARGET_ENCODING 0x20 /* Default encoding: UTF-8 */
/* XML error codes */
enum xml_err_code{
    SXML_ERROR_NONE = 1,
    SXML_ERROR_NO_MEMORY,
    SXML_ERROR_SYNTAX,
    SXML_ERROR_NO_ELEMENTS,
    SXML_ERROR_INVALID_TOKEN,
    SXML_ERROR_UNCLOSED_TOKEN,
    SXML_ERROR_PARTIAL_CHAR,
    SXML_ERROR_TAG_MISMATCH,
    SXML_ERROR_DUPLICATE_ATTRIBUTE,
    SXML_ERROR_JUNK_AFTER_DOC_ELEMENT,
    SXML_ERROR_PARAM_ENTITY_REF,
    SXML_ERROR_UNDEFINED_ENTITY,
    SXML_ERROR_RECURSIVE_ENTITY_REF,
    SXML_ERROR_ASYNC_ENTITY,
    SXML_ERROR_BAD_CHAR_REF,
    SXML_ERROR_BINARY_ENTITY_REF,
    SXML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF,
    SXML_ERROR_MISPLACED_XML_PI,
    SXML_ERROR_UNKNOWN_ENCODING,
    SXML_ERROR_INCORRECT_ENCODING,
    SXML_ERROR_UNCLOSED_CDATA_SECTION,
    SXML_ERROR_EXTERNAL_ENTITY_HANDLING
};
/* Each active XML SAX parser is represented by an instance 
 * of the following structure.
 */
typedef struct SyXMLParser SyXMLParser;
struct SyXMLParser
{
	SyMemBackend *pAllocator; /* Memory backend */
	void *pUserData;          /* User private data forwarded varbatim by the XML parser
					           * as the last argument to the users callbacks.
						       */
	SyHash hns;               /* Namespace hashtable */
	SySet sToken;             /* XML tokens */
	SyLex sLex;               /* Lexical analyzer */
	sxi32 nFlags;             /* Control flags */
	/* User callbacks */
	ProcXMLStartTagHandler    xStartTag;     /* Start element handler */
	ProcXMLEndTagHandler      xEndTag;       /* End element handler */
	ProcXMLTextHandler        xRaw;          /* Raw text/CDATA handler   */
	ProcXMLDoctypeHandler     xDoctype;      /* DOCTYPE handler */
	ProcXMLPIHandler          xPi;           /* Processing instruction (PI) handler*/
	ProcXMLSyntaxErrorHandler xError;        /* Error handler */
	ProcXMLStartDocument      xStartDoc;     /* StartDoc handler */
	ProcXMLEndDocument        xEndDoc;       /* EndDoc handler */
	ProcXMLNameSpaceStart   xNameSpace;    /* Namespace declaration handler  */
	ProcXMLNameSpaceEnd       xNameSpaceEnd; /* End namespace declaration handler */
};
/*
 * --------------
 * Archive extractor:
 * --------------
 * Each open ZIP/TAR archive is identified by an instance of the following structure.
 * That is, a process can open one or more archives and manipulates them in thread safe
 * way by simply working with pointers to the following structure.
 * Each entry in the archive is remembered in a hashtable.
 * Lookup is very fast and entry with the same name are chained together.
 */
 typedef struct SyArchiveEntry SyArchiveEntry;
 typedef struct SyArchive SyArchive;
 struct SyArchive
 {
 	SyMemBackend	*pAllocator; /* Memory backend */
	SyArchiveEntry *pCursor;     /* Cursor for linear traversal of archive entries */
	SyArchiveEntry *pList;       /* Pointer to the List of the loaded archive */
	SyArchiveEntry **apHash;     /* Hashtable for archive entry */
	ProcRawStrCmp xCmp;          /* Hash comparison function */
	ProcHash xHash;              /* Hash Function */
	sxu32 nSize;        /* Hashtable size */
 	sxu32 nEntry;       /* Total number of entries in the zip/tar archive */
 	sxu32 nLoaded;      /* Total number of entries loaded in memory */
 	sxu32 nCentralOfft;	/* Central directory offset(ZIP only. Otherwise Zero) */
 	sxu32 nCentralSize;	/* Central directory size(ZIP only. Otherwise Zero) */
	void *pUserData;    /* Upper layer private data */
	sxu32 nMagic;       /* Sanity check */
	
 };
#define SXARCH_MAGIC	0xDEAD635A
#define SXARCH_INVALID(ARCH)            (ARCH == 0  || ARCH->nMagic != SXARCH_MAGIC)
#define SXARCH_ENTRY_INVALID(ENTRY)	    (ENTRY == 0 || ENTRY->nMagic != SXARCH_MAGIC)
#define SyArchiveHashFunc(ARCH)	        (ARCH)->xHash
#define SyArchiveCmpFunc(ARCH)	        (ARCH)->xCmp
#define SyArchiveUserData(ARCH)         (ARCH)->pUserData
#define SyArchiveSetUserData(ARCH,DATA) (ARCH)->pUserData = DATA
/*
 * Each loaded archive record is identified by an instance
 * of the following structure.
 */
 struct SyArchiveEntry
 { 	
 	sxu32 nByte;         /* Contents size before compression */
 	sxu32 nByteCompr;    /* Contents size after compression */
	sxu32 nReadCount;    /* Read counter */
 	sxu32 nCrc;          /* Contents CRC32  */
 	Sytm  sFmt;	         /* Last-modification time */
 	sxu32 nOfft;         /* Data offset. */
 	sxu16 nComprMeth;	 /* Compression method 0 == stored/8 == deflated and so on (see appnote.txt)*/
 	sxu16 nExtra;        /* Extra size if any */
 	SyString sFileName;  /* entry name & length */
 	sxu32 nDup;	/* Total number of entries with the same name */
	SyArchiveEntry *pNextHash,*pPrevHash; /* Hash collision chains */
 	SyArchiveEntry *pNextName;    /* Next entry with the same name */
	SyArchiveEntry *pNext,*pPrev; /* Next and previous entry in the list */
	sxu32 nHash;     /* Hash of the entry name */
 	void *pUserData; /* User data */ 
	sxu32 nMagic;    /* Sanity check */
 };
 /*
 * Extra flags for extending the file local header
 */ 
#define SXZIP_EXTRA_TIMESTAMP	0x001	/* Extended UNIX timestamp */
#endif /* PH7_DISABLE_BUILTIN_FUNC */
#ifndef PH7_DISABLE_HASH_FUNC
/* MD5 context */
typedef struct MD5Context MD5Context;
struct MD5Context {
 sxu32 buf[4];
 sxu32 bits[2];
 unsigned char in[64];
};
/* SHA1 context */
typedef struct SHA1Context SHA1Context;
struct SHA1Context {
  unsigned int state[5];
  unsigned int count[2];
  unsigned char buffer[64];
};
#endif /* PH7_DISABLE_HASH_FUNC */
/* PH7 private declaration */
/*
 * Memory Objects.
 * Internally, the PH7 virtual machine manipulates nearly all PHP values
 * [i.e: string, int, float, resource, object, bool, null] as ph7_values structures.
 * Each ph7_values struct may cache multiple representations (string, integer etc.)
 * of the same value.
 */
struct ph7_value
{
	ph7_real rVal;      /* Real value */
	union{              
		sxi64 iVal;     /* Integer value */
		void *pOther;   /* Other values (Object, Array, Resource, Namespace, etc.) */
	}x;
	sxi32 iFlags;       /* Control flags (see below) */
	ph7_vm *pVm;        /* Virtual machine that own this instance */
	SyBlob sBlob;       /* String values */
	sxu32 nIdx;         /* Index number of this entry in the global object allocator */
};
/* Allowed value types.
 */
#define MEMOBJ_STRING    0x001  /* Memory value is a UTF-8 string */
#define MEMOBJ_INT       0x002  /* Memory value is an integer */
#define MEMOBJ_REAL      0x004  /* Memory value is a real number */
#define MEMOBJ_BOOL      0x008  /* Memory value is a boolean */
#define MEMOBJ_NULL      0x020  /* Memory value is NULL */
#define MEMOBJ_HASHMAP   0x040  /* Memory value is a hashmap aka 'array' in the PHP jargon */
#define MEMOBJ_OBJ       0x080  /* Memory value is an object [i.e: class instance] */
#define MEMOBJ_RES       0x100  /* Memory value is a resource [User private data] */ 
#define MEMOBJ_REFERENCE 0x400  /* Memory value hold a reference (64-bit index) of another ph7_value */
/* Mask of all known types */
#define MEMOBJ_ALL (MEMOBJ_STRING|MEMOBJ_INT|MEMOBJ_REAL|MEMOBJ_BOOL|MEMOBJ_NULL|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES) 
/* Scalar variables
 * According to the PHP language reference manual
 *  Scalar variables are those containing an integer, float, string or boolean.
 *  Types array, object and resource are not scalar. 
 */
#define MEMOBJ_SCALAR (MEMOBJ_STRING|MEMOBJ_INT|MEMOBJ_REAL|MEMOBJ_BOOL|MEMOBJ_NULL)
#define MEMOBJ_AUX (MEMOBJ_REFERENCE)
/*
 * The following macro clear the current ph7_value type and replace
 * it with the given one.
 */
#define MemObjSetType(OBJ,TYPE) ((OBJ)->iFlags = ((OBJ)->iFlags&~MEMOBJ_ALL)|TYPE)
/* ph7_value cast method signature */
typedef sxi32 (*ProcMemObjCast)(ph7_value *);
/* Forward reference */
typedef struct ph7_output_consumer ph7_output_consumer;
typedef struct ph7_user_func ph7_user_func;
typedef struct ph7_conf ph7_conf;
/*
 * An instance of the following structure store the default VM output 
 * consumer and it's private data.
 * Client-programs can register their own output consumer callback
 * via the [PH7_VM_CONFIG_OUTPUT] configuration directive.
 * Please refer to the official documentation for more information
 * on how to register an output consumer callback.
 */
struct ph7_output_consumer
{
	ProcConsumer xConsumer; /* VM output consumer routine */
	void *pUserData;        /* Third argument to xConsumer() */
	ProcConsumer xDef;      /* Default output consumer routine */
	void *pDefData;         /* Third argument to xDef() */
};
/*
 * PH7 engine [i.e: ph7 instance] configuration is stored in
 * an instance of the following structure.
 * Please refer to the official documentation for more information
 * on how to configure your ph7 engine instance.
 */
struct ph7_conf
{
	ProcConsumer xErr;   /* Compile-time error consumer callback */
	void *pErrData;      /* Third argument to xErr() */
	SyBlob sErrConsumer; /* Default error consumer */
};
/*
 * Signature of the C function responsible of expanding constant values.
 */
typedef void (*ProcConstant)(ph7_value *,void *);
/*
 * Each registered constant [i.e: __TIME__, __DATE__, PHP_OS, INT_MAX, etc.] is stored
 * in an instance of the following structure.
 * Please refer to the official documentation for more information
 * on how to create/install foreign constants.
 */
typedef struct ph7_constant ph7_constant;
struct ph7_constant
{
	SyString sName;        /* Constant name */
	ProcConstant xExpand;  /* Function responsible of expanding constant value */
	void *pUserData;       /* Last argument to xExpand() */
};
typedef struct ph7_aux_data ph7_aux_data;
/*
 * Auxiliary data associated with each foreign function is stored
 * in a stack of the following structure.
 * Note that automatic tracked chunks are also stored in an instance
 * of this structure.
 */
struct ph7_aux_data
{
	void *pAuxData; /* Aux data */
};
/* Foreign functions signature */
typedef int (*ProchHostFunction)(ph7_context *,int,ph7_value **);
/*
 * Each installed foreign function is recored in an instance of the following
 * structure.
 * Please refer to the official documentation for more information on how 
 * to create/install foreign functions.
 */
struct ph7_user_func
{
	ph7_vm *pVm;              /* VM that own this instance */
	SyString sName;           /* Foreign function name */
	ProchHostFunction xFunc;  /* Implementation of the foreign function */
	void *pUserData;          /* User private data [Refer to the official documentation for more information]*/
	SySet aAux;               /* Stack of auxiliary data [Refer to the official documentation for more information]*/
};
/*
 * The 'context' argument for an installable function. A pointer to an
 * instance of this structure is the first argument to the routines used
 * implement the foreign functions.
 */
struct ph7_context
{
	ph7_user_func *pFunc;   /* Function information. */
	ph7_value *pRet;        /* Return value is stored here. */
	SySet sVar;             /* Container of dynamically allocated ph7_values
							 * [i.e: Garbage collection purposes.]
							 */
	SySet sChunk;           /* Track dynamically allocated chunks [ph7_aux_data instance]. 
							 * [i.e: Garbage collection purposes.]
							 */
	ph7_vm *pVm;            /* Virtual machine that own this context */
	sxi32 iFlags;           /* Call flags */
};
/*
 * Each hashmap entry [i.e: array(4,5,6)] is recorded in an instance
 * of the following structure.
 */
struct ph7_hashmap_node
{
	ph7_hashmap *pMap;     /* Hashmap that own this instance */
	sxi32 iType;           /* Node type */
	union{
		sxi64 iKey;        /* Int key */
		SyBlob sKey;       /* Blob key */
	}xKey;
	sxi32 iFlags;          /* Control flags */
	sxu32 nHash;           /* Key hash value */
	sxu32 nValIdx;         /* Value stored in this node */
	ph7_hashmap_node *pNext,*pPrev;               /* Link to other entries [i.e: linear traversal] */
	ph7_hashmap_node *pNextCollide,*pPrevCollide; /* Collision chain */
};
/* 
 * Each active hashmap aka array in the PHP jargon is represented
 * by an instance of the following structure.
 */
struct ph7_hashmap
{
	ph7_vm *pVm;                  /* VM that own this instance */
	ph7_hashmap_node **apBucket;  /* Hash bucket */
	ph7_hashmap_node *pFirst;     /* First inserted entry */
	ph7_hashmap_node *pLast;      /* Last inserted entry */
	ph7_hashmap_node *pCur;       /* Current entry */
	sxu32 nSize;                  /* Bucket size */
	sxu32 nEntry;                 /* Total number of inserted entries */
	sxu32 (*xIntHash)(sxi64);     /* Hash function for int_keys */
	sxu32 (*xBlobHash)(const void *,sxu32); /* Hash function for blob_keys */
	sxi64 iNextIdx;               /* Next available automatically assigned index */
	sxi32 iRef;                   /* Reference count */
};
/* An instance of the following structure is the context
 * for the FOREACH_STEP/FOREACH_INIT VM instructions.
 * Those instructions are used to implement the 'foreach'
 * statement.
 * This structure is made available to these instructions
 * as the P3 operand. 
 */
struct ph7_foreach_info
{
	SyString sKey;      /* Key name. Empty otherwise*/
	SyString sValue;    /* Value name */
	sxi32 iFlags;       /* Control flags */
	SySet aStep;        /* Stack of steps [i.e: ph7_foreach_step instance] */
};
struct ph7_foreach_step
{
	sxi32 iFlags;                   /* Control flags (see below) */
	/* Iterate on those values */
	union {
		ph7_hashmap *pMap;          /* Hashmap [i.e: array in the PHP jargon] iteration
									 * Ex: foreach(array(1,2,3) as $key=>$value){} 
									 */
		ph7_class_instance *pThis;  /* Class instance [i.e: object] iteration */
	}xIter;
};
/* Foreach step control flags */
#define PH7_4EACH_STEP_HASHMAP 0x001 /* Hashmap iteration */
#define PH7_4EACH_STEP_OBJECT  0x002 /* Object  iteration */
#define PH7_4EACH_STEP_KEY     0x004 /* Make Key available */
#define PH7_4EACH_STEP_REF     0x008 /* Pass value by reference not copy */
/*
 * Each PH7 engine is identified by an instance of the following structure.
 * Please refer to the official documentation for more information
 * on how to configure your PH7 engine instance.
 */
struct ph7
{
	SyMemBackend sAllocator;     /* Low level memory allocation subsystem */
	const ph7_vfs *pVfs;         /* Underlying Virtual File System */
	ph7_conf xConf;              /* Configuration */
#if defined(PH7_ENABLE_THREADS)
	const SyMutexMethods *pMethods;  /* Mutex methods */
	SyMutex *pMutex;                 /* Per-engine mutex */
#endif
	ph7_vm *pVms;      /* List of active VM */
	sxi32 iVm;         /* Total number of active VM */
	ph7 *pNext,*pPrev; /* List of active engines */
	sxu32 nMagic;      /* Sanity check against misuse */
};
/* Code generation data structures */
typedef sxi32 (*ProcErrorGen)(void *,sxi32,sxu32,const char *,...);
typedef struct ph7_expr_node   ph7_expr_node;
typedef struct ph7_expr_op     ph7_expr_op;
typedef struct ph7_gen_state   ph7_gen_state;
typedef struct GenBlock        GenBlock;
typedef sxi32 (*ProcLangConstruct)(ph7_gen_state *);
typedef sxi32 (*ProcNodeConstruct)(ph7_gen_state *,sxi32);
/*
 * Each supported operator [i.e: +, -, ==, *, %, >>, >=, new, etc.] is represented
 * by an instance of the following structure.
 * The PH7 parser does not use any external tools and is 100% handcoded.
 * That is, the PH7 parser is thread-safe ,full reentrant, produce consistant 
 * compile-time errrors and at least 7 times faster than the standard PHP parser.
 */
struct ph7_expr_op
{
	SyString sOp;   /* String representation of the operator [i.e: "+","*","=="...] */
	sxi32 iOp;      /* Operator ID */
	sxi32 iPrec;    /* Operator precedence: 1 == Highest */ 
	sxi32 iAssoc;   /* Operator associativity (either left,right or non-associative) */ 
	sxi32 iVmOp;    /* VM OP code for this operator [i.e: PH7_OP_EQ,PH7_OP_LT,PH7_OP_MUL...]*/
};
/*
 * Each expression node is parsed out and recorded
 * in an instance of the following structure.
 */
struct ph7_expr_node
{
	const ph7_expr_op *pOp;  /* Operator ID or NULL if literal, constant, variable, function or class method call */
	ph7_expr_node *pLeft;    /* Left expression tree */
	ph7_expr_node *pRight;   /* Right expression tree */
	SyToken *pStart;         /* Stream of tokens that belong to this node */
	SyToken *pEnd;           /* End of token stream */
	sxi32 iFlags;            /* Node construct flags */
	ProcNodeConstruct xCode; /* C routine responsible of compiling this node */
	SySet aNodeArgs;         /* Node arguments. Only used by postfix operators [i.e: function call]*/
	ph7_expr_node *pCond;    /* Condition: Only used by the ternary operator '?:' */
};
/* Node Construct flags */
#define EXPR_NODE_PRE_INCR 0x01 /* Pre-icrement/decrement [i.e: ++$i,--$j] node */
/*
 * A block of instructions is recorded in an instance of the following structure.
 * This structure is used only during compile-time and have no meaning
 * during bytecode execution.
 */
struct GenBlock
{
	ph7_gen_state *pGen;  /* State of the code generator */
	GenBlock *pParent;    /* Upper block or NULL if global */
	sxu32 nFirstInstr;    /* First instruction to execute  */
	sxi32 iFlags;         /* Block control flags (see below) */
	SySet aJumpFix;       /* Jump fixup (JumpFixup instance) */
	void *pUserData;      /* Upper layer private data */
	/* The following two fields are used only when compiling 
	 * the 'do..while()' language construct.
	 */
	sxu8 bPostContinue;    /* TRUE when compiling the do..while() statement */
	SySet aPostContFix;    /* Post-continue jump fix */
};
/*
 * Code generator state is remembered in an instance of the following
 * structure. We put the information in this structure and pass around
 * a pointer to this structure, rather than pass around  all of the 
 * information separately. This helps reduce the number of  arguments
 * to generator functions.
 * This structure is used only during compile-time and have no meaning
 * during bytecode execution.
 */
struct ph7_gen_state
{
	ph7_vm *pVm;         /* VM that own this instance */
	SyHash hLiteral;     /* Constant string Literals table */
	SyHash hNumLiteral;  /* Numeric literals table */
	SyHash hVar;         /* Collected variable hashtable */
	GenBlock *pCurrent;  /* Current processed block */
	GenBlock sGlobal;    /* Global block */
	ProcConsumer xErr;   /* Error consumer callback */
	void *pErrData;      /* Third argument to xErr() */
	SySet aLabel;        /* Label table */
	SySet aGoto;         /* Gotos table */
	SyBlob sWorker;      /* General purpose working buffer */
	SyBlob sErrBuf;      /* Error buffer */
	SyToken *pIn;        /* Current processed token */
	SyToken *pEnd;       /* Last token in the stream */
	sxu32 nErr;          /* Total number of compilation error */
	SyToken *pRawIn;     /* Current processed raw token */
	SyToken *pRawEnd;    /* Last raw token in the stream */
	SySet   *pTokenSet;  /* Token containers */
};
/* Forward references */
typedef struct ph7_vm_func_closure_env ph7_vm_func_closure_env;
typedef struct ph7_vm_func_static_var  ph7_vm_func_static_var;
typedef struct ph7_vm_func_arg ph7_vm_func_arg;
typedef struct ph7_vm_func ph7_vm_func;
typedef struct VmFrame VmFrame;
/*
 * Each collected function argument is recorded in an instance
 * of the following structure.
 * Note that as an extension, PH7 implements full type hinting
 * which mean that any function can have it's own signature.
 * Example:
 *      function foo(int $a,string $b,float $c,ClassInstance $d){}
 * This is how the powerful function overloading mechanism is
 * implemented.
 * Note that as an extension, PH7 allow function arguments to have
 * any complex default value associated with them unlike the standard
 * PHP engine.
 * Example:
 *    function foo(int $a = rand() & 1023){}
 *    now, when foo is called without arguments [i.e: foo()] the
 *    $a variable (first parameter) will be set to a random number
 *    between 0 and 1023 inclusive.
 * Refer to the official documentation for more information on this
 * mechanism and other extension introduced by the PH7 engine.
 */
struct ph7_vm_func_arg
{
	SyString sName;      /* Argument name */
	SySet aByteCode;     /* Compiled default value associated with this argument */
	sxu32 nType;         /* Type of this argument [i.e: array, int, string, float, object, etc.] */
	SyString sClass;     /* Class name if the argument expect a class instance [i.e: function foo(BaseClass $bar){} ] */
	sxi32 iFlags;        /* Configuration flags */
};
/*
 * Each static variable is parsed out and remembered in an instance
 * of the following structure.
 * Note that as an extension, PH7 allow static variable have
 * any complex default value associated with them unlike the standard
 * PHP engine.
 * Example:
 *   static $rand_str = 'PH7'.rand_str(3); // Concatenate 'PH7' with 
 *                                         // a random three characters(English alphabet)
 *   var_dump($rand_str);
 *   //You should see something like this
 *   string(6 'PH7awt');   
 */
struct ph7_vm_func_static_var
{
	SyString sName;   /* Static variable name */
	SySet aByteCode;  /* Compiled initialization expression  */
	sxu32 nIdx;       /* Object index in the global memory object container */
};
/*
 * Each imported variable from the outside closure environnment is recoded 
 * in an instance of the following structure.
 */
struct ph7_vm_func_closure_env
{
	SyString sName;   /* Imported variable name */
	int iFlags;       /* Control flags */
	ph7_value sValue; /* Imported variable value */
	sxu32 nIdx;       /* Reference to the bounded variable if passed by reference
					   *[Example:
					   *  $x = 1;
					   *  $closure = function() use (&$x) { ++$x; }
					   *  $closure();
					   *]
					   */
};
/* Function configuration flags */
#define VM_FUNC_ARG_BY_REF   0x001 /* Argument passed by reference */
#define VM_FUNC_ARG_HAS_DEF  0x002 /* Argument has default value associated with it */
#define VM_FUNC_REF_RETURN   0x004 /* Return by reference */
#define VM_FUNC_CLASS_METHOD 0x008 /* VM function is in fact a class method */
#define VM_FUNC_CLOSURE      0x010 /* VM function is a closure */
#define VM_FUNC_ARG_IGNORE   0x020 /* Do not install argument in the current frame */
/*
 * Each user defined function is parsed out and stored in an instance
 * of the following structure.
 * PH7 introduced some powerfull extensions to the PHP 5 programming
 * language like function overloading, type hinting, complex default
 * arguments values and many more.
 * Please refer to the official documentation for more information.
 */
struct ph7_vm_func
{
	SySet aArgs;         /* Expected arguments (ph7_vm_func_arg instance) */
	SySet aStatic;       /* Static variable (ph7_vm_func_static_var instance) */
	SyString sName;      /* Function name */
	SySet aByteCode;     /* Compiled function body */
	SySet aClosureEnv;   /* Closure environment (ph7_vm_func_closure_env instace) */
	sxi32 iFlags;        /* VM function configuration */
	SyString sSignature; /* Function signature used to implement function overloading
						  * (Refer to the official docuemntation for more information
						  *  on this powerfull feature)
						  */
	void *pUserData;     /* Upper layer private data associated with this instance */
	ph7_vm_func *pNextName; /* Next VM function with the same name as this one */
};
/* Forward reference */
typedef struct ph7_builtin_constant ph7_builtin_constant;
typedef struct ph7_builtin_func ph7_builtin_func;
/*
 * Each built-in foreign function (C function) is stored in an
 * instance of the following structure.
 * Please refer to the official documentation for more information
 * on how to create/install foreign functions.
 */
struct ph7_builtin_func
{
	const char *zName;        /* Function name [i.e: strlen(), rand(), array_merge(), etc.]*/
	ProchHostFunction xFunc;  /* C routine performing the computation */
};
/*
 * Each built-in foreign constant is stored in an instance
 * of the following structure.
 * Please refer to the official documentation for more information
 * on how to create/install foreign constants.
 */
struct ph7_builtin_constant
{
	const char *zName;     /* Constant name */
	ProcConstant xExpand;  /* C routine responsible of expanding constant value*/
};
/* Forward reference */
typedef struct ph7_class_method ph7_class_method;
typedef struct ph7_class_attr   ph7_class_attr;
/*
 * Each class is parsed out and stored in an instance of the following structure.
 * PH7 introduced powerfull extensions to the PHP 5 OO subsystems.
 * Please refer to the official documentation for more information.
 */
struct ph7_class
{
	ph7_class *pBase;     /* Base class if any */
	SyHash hDerived;      /* Derived [child] classes */ 
	SyString sName;       /* Class full qualified name */
	sxi32 iFlags;         /* Class configuration flags [i.e: final, interface, abstract, etc.]  */
	SyHash hAttr;         /* Class attributes [i.e: variables and constants] */
	SyHash hMethod;       /* Class methods */
	sxu32 nLine;          /* Line number on which this class was declared */
	SySet aInterface;     /* Implemented interface container */
	ph7_class *pNextName; /* Next class [interface, abstract, etc.] with the same name */
};
/* Class configuration flags */
#define PH7_CLASS_FINAL       0x001 /* Class is final [cannot be extended] */
#define PH7_CLASS_INTERFACE   0x002 /* Class is interface */
#define PH7_CLASS_ABSTRACT    0x004 /* Class is abstract */
/* Class attribute/methods/constants protection levels */
#define PH7_CLASS_PROT_PUBLIC     1 /* public */
#define PH7_CLASS_PROT_PROTECTED  2 /* protected */
#define PH7_CLASS_PROT_PRIVATE    3 /* private */    
/*
 * each class attribute (variable, constants) is parsed out and stored
 * in an instance of the following structure.
 */
struct ph7_class_attr
{
	SyString sName;      /* Atrribute name */
	sxi32 iFlags;        /* Attribute configuration [i.e: static, variable, constant, etc.] */
	sxi32 iProtection;   /* Protection level [i.e: public, private, protected] */
	SySet aByteCode;     /* Compiled attribute body */
	sxu32 nIdx;          /* Attribute index */
	sxu32 nLine;         /* Line number on which this attribute was defined */
};
/* Attribute configuration */
#define PH7_CLASS_ATTR_STATIC       0x001  /* Static attribute */
#define PH7_CLASS_ATTR_CONSTANT     0x002  /* Constant attribute */
#define PH7_CLASS_ATTR_ABSTRACT     0x004  /* Abstract method */
#define PH7_CLASS_ATTR_FINAL        0x008  /* Final method */
/* 
 * Each class method is parsed out and stored in an instance of the following
 * structure.
 * PH7 introduced some powerfull extensions to the PHP 5 programming
 * language like function overloading,type hinting,complex default
 * arguments and many more.
 * Please refer to the official documentation for more information.
 */
struct ph7_class_method
{
	ph7_vm_func sFunc;   /* Compiled method body */
	SyString sVmName;    /* Automatically generated name assigned to this method.
						  * Typically this is "[class_name__method_name@random_string]"
						  */
	sxi32 iProtection;   /* Protection level [i.e: public,private,protected] */
	sxi32 iFlags;        /* Methods configuration */
	sxi32 iCloneDepth;   /* Clone depth [Only used by the magic method __clone ] */
    sxu32 nLine;         /* Line on which this method was defined */
};
/*
 * Each active object (class instance) is represented by an instance of 
 * the following structure.
 */
struct ph7_class_instance
{
	ph7_vm *pVm;        /* VM that own this instance */
	ph7_class *pClass;  /* Object is an instance of this class */
	SyHash hAttr;       /* Hashtable of active class members */
	sxi32 iRef;         /* Reference count */
	sxi32 iFlags;       /* Control flags */
};
/*
 * A single instruction of the virtual machine has an opcode
 * and as many as three operands.
 * Each VM instruction resulting from compiling a PHP script
 * is stored in an instance of the following structure.
 */
typedef struct VmInstr VmInstr;
struct VmInstr
{
	sxu8  iOp; /* Operation to preform */
	sxi32 iP1; /* First operand */
	sxu32 iP2; /* Second operand (Often the jump destination) */
	void *p3;  /* Third operand (Often Upper layer private data) */
};
/* Each active class instance attribute is represented by an instance 
 * of the following structure.
 */
typedef struct VmClassAttr VmClassAttr;
struct VmClassAttr
{
	ph7_class_attr *pAttr; /* Class attribute */
	sxu32 nIdx;            /* Memory object index */
};
 /* Forward reference */
typedef struct VmRefObj VmRefObj;
/*
 * Each catch [i.e catch(Exception $e){ } ] block is parsed out and stored
 * in an instance of the following structure.
 */
typedef struct ph7_exception_block ph7_exception_block;
typedef struct ph7_exception ph7_exception;
struct ph7_exception_block
{
	SyString sClass; /* Exception class name [i.e: Exception,MyException...] */
	SyString sThis;  /* Instance name [i.e: $e..] */
	SySet sByteCode; /* Block compiled instructions */
};
/* 
 * Context for the exception mechanism.
 */
struct ph7_exception
{
	ph7_vm *pVm;    /* VM that own this exception */
	SySet sEntry;   /* Compiled 'catch' blocks (ph7_exception_block instance)
				     * container.
					 */
	VmFrame *pFrame; /* Frame that trigger the exception */
};
/* Forward reference */
typedef struct ph7_case_expr ph7_case_expr;
typedef struct ph7_switch ph7_switch;
/*
 * Each compiled case block in a swicth statement is compiled
 * and stored in an instance of the following structure.
 */
struct ph7_case_expr
{
	SySet aByteCode;   /* Compiled body of the case block */
	sxu32 nStart;      /* First instruction to execute */
};
/*
 * Each compiled switch statement is parsed out and stored
 * in an instance of the following structure.
 */
struct ph7_switch
{
	SySet aCaseExpr;  /* Compile case block */
	sxu32 nOut;       /* First instruction to execute after this statement */
	sxu32 nDefault;   /* First instruction to execute in the default block */
};
/* Assertion flags */
#define PH7_ASSERT_DISABLE    0x01  /* Disable assertion */
#define PH7_ASSERT_WARNING    0x02  /* Issue a warning for each failed assertion */
#define PH7_ASSERT_BAIL       0x04  /* Terminate execution on failed assertions */
#define PH7_ASSERT_QUIET_EVAL 0x08  /* Not used */
#define PH7_ASSERT_CALLBACK   0x10  /* Callback to call on failed assertions */
/* 
 * error_log() consumer function signature.
 * Refer to the [PH7_VM_CONFIG_ERR_LOG_HANDLER] configuration directive
 * for more information on how to register an error_log consumer().
 */
typedef void (*ProcErrLog)(const char *,int,const char *,const char *);
/* 
 * An instance of the following structure hold the bytecode instructions
 * resulting from compiling a PHP script.
 * This structure contains the complete state of the virtual machine.
 */
struct ph7_vm
{
	SyMemBackend sAllocator;	/* Memory backend */
#if defined(PH7_ENABLE_THREADS)
	SyMutex *pMutex;           /* Recursive mutex associated with VM. */
#endif
	ph7 *pEngine;               /* Interpreter that own this VM */
	SySet aByteCode;            /* Default bytecode container */
	SySet *pByteContainer;      /* Current bytecode container */
	VmFrame *pFrame;            /* Stack of active frames */
	SyPRNGCtx sPrng;            /* PRNG context */
	SySet aMemObj;              /* Object allocation table */
	SySet aLitObj;              /* Literals allocation table */
	ph7_value *aOps;            /* Operand stack */
	SySet aFreeObj;             /* Stack of free memory objects */
	SyHash hClass;              /* Compiled classes container */
	SyHash hConstant;           /* Host-application and user defined constants container */
	SyHash hHostFunction;       /* Host-application installable functions */
	SyHash hFunction;           /* Compiled functions */
	SyHash hSuper;              /* Superglobals hashtable */
	SyHash hPDO;                /* PDO installed drivers */
	SyBlob sConsumer;           /* Default VM consumer [i.e Redirect all VM output to this blob] */
	SyBlob sWorker;             /* General purpose working buffer */
	SyBlob sArgv;               /* $argv[] collector [refer to the [getopt()] implementation for more information] */
	SySet aFiles;               /* Stack of processed files */
	SySet aPaths;               /* Set of import paths */
	SySet aIncluded;            /* Set of included files */
	SySet aOB;                  /* Stackable output buffers */
	SySet aShutdown;            /* Stack of shutdown user callbacks */
	SySet aException;           /* Stack of loaded exception */
	SySet aIOstream;            /* Installed IO stream container */
	const ph7_io_stream *pDefStream; /* Default IO stream [i.e: typically this is the 'file://' stream] */
	ph7_value sExec;           /* Compiled script return value [Can be extracted via the PH7_VM_CONFIG_EXEC_VALUE directive]*/
	ph7_value aExceptionCB[2]; /* Installed exception handler callbacks via [set_exception_handler()] */
	ph7_value aErrCB[2];       /* Installed error handler callback via [set_error_handler()] */
	void *pStdin;              /* STDIN IO stream */
	void *pStdout;             /* STDOUT IO stream */
	void *pStderr;             /* STDERR IO stream */
	int bErrReport;            /* TRUE to report all runtime Error/Warning/Notice */
	int nRecursionDepth;       /* Current recursion depth */
	int nMaxDepth;             /* Maximum allowed recusion depth */
	int nObDepth;              /* OB depth */
	int nExceptDepth;          /* Exception depth */
	int closure_cnt;           /* Loaded closures counter */
	int json_rc;               /* JSON return status [refer to json_encode()/json_decode()]*/
	sxu32 unique_id;           /* Random number used to generate unique ID [refer to uniqid() for more info]*/
	ProcErrLog xErrLog;        /* error_log() consumer [refer to PH7_VM_CONFIG_ERR_LOG_HANDLER] */
	sxu32 nOutputLen;          /* Total number of generated output */
	ph7_output_consumer sVmConsumer; /* Registered output consumer callback */
	int iAssertFlags;          /* Assertion flags */
	ph7_value sAssertCallback; /* Callback to call on failed assertions */
	VmRefObj **apRefObj;       /* Hashtable of referenced object */
	VmRefObj *pRefList;        /* List of referenced memory objects */
	sxu32 nRefSize;            /* apRefObj[] size */
	sxu32 nRefUsed;            /* Total entries in apRefObj[] */
	SySet aSelf;               /* 'self' stack used for static member access [i.e: self::MyConstant] */
	ph7_hashmap *pGlobal;      /* $GLOBALS hashmap */ 
	sxu32 nGlobalIdx;          /* $GLOBALS index */
	sxi32 iExitStatus;         /* Script exit status */
	ph7_gen_state sCodeGen;    /* Code generator module */
	ph7_vm *pNext,*pPrev;      /* List of active VM's */
	sxu32 nMagic;              /* Sanity check against misuse */
};
/*
 * Allowed value for ph7_vm.nMagic
 */
#define PH7_VM_INIT   0xFADE9512  /* VM correctly initialized */
#define PH7_VM_RUN    0xEA271285  /* VM ready to execute PH7 bytecode */
#define PH7_VM_EXEC   0xCAFE2DAD  /* VM executing PH7 bytecode */
#define PH7_VM_STALE  0xBAD1DEAD  /* Stale VM */
/*
 * Error codes according to the PHP language reference manual.
 */
enum iErrCode
{
	E_ERROR             = 1,   /* Fatal run-time errors. These indicate errors that can not be recovered 
							    * from, such as a memory allocation problem. Execution of the script is
							    * halted.
								* The only fatal error under PH7 is an out-of-memory. All others erros
								* even a call to undefined function will not halt script execution.
							    */
	E_WARNING           = 2,   /* Run-time warnings (non-fatal errors). Execution of the script is not halted.  */
	E_PARSE             = 4,   /* Compile-time parse errors. Parse errors should only be generated by the parser.*/
	E_NOTICE            = 8,   /* Run-time notices. Indicate that the script encountered something that could 
							    * indicate an error, but could also happen in the normal course of running a script. 
							    */
	E_CORE_WARNING      = 16,  /* Fatal errors that occur during PHP's initial startup. This is like an E_ERROR
							    * except it is generated by the core of PHP. 
							    */
	E_USER_ERROR        = 256,  /* User-generated error message.*/
	E_USER_WARNING      = 512,  /* User-generated warning message.*/
	E_USER_NOTICE       = 1024, /* User-generated notice message.*/ 
	E_STRICT            = 2048, /* Enable to have PHP suggest changes to your code which will ensure the best interoperability
								 * and forward compatibility of your code.
								 */
	E_RECOVERABLE_ERROR = 4096, /* Catchable fatal error. It indicates that a probably dangerous error occured, but did not 
								 * leave the Engine in an unstable state. If the error is not caught by a user defined handle
								 * the application aborts as it was an E_ERROR.
								 */
	E_DEPRECATED        = 8192, /* Run-time notices. Enable this to receive warnings about code that will not
								 * work in future versions.  
								 */
	E_USER_DEPRECATED   = 16384, /* User-generated warning message. */
	E_ALL               = 32767  /* All errors and warnings */
};
/*
 * Each VM instruction resulting from compiling a PHP script is represented
 * by one of the following OP codes.
 * The program consists of a linear sequence of operations. Each operation
 * has an opcode and 3 operands.Operands P1 is an integer.
 * Operand P2 is an unsigned integer and operand P3 is a memory address.
 * Few opcodes use all 3 operands.
 */
enum ph7_vm_op {
  PH7_OP_DONE =   1,   /* Done */
  PH7_OP_HALT,         /* Halt */
  PH7_OP_LOAD,         /* Load memory object */
  PH7_OP_LOADC,        /* Load constant */
  PH7_OP_LOAD_IDX,     /* Load array entry */   
  PH7_OP_LOAD_MAP,     /* Load hashmap('array') */
  PH7_OP_LOAD_LIST,    /* Load list */
  PH7_OP_LOAD_CLOSURE, /* Load closure */
  PH7_OP_NOOP,         /* NOOP */
  PH7_OP_JMP,          /* Unconditional jump */
  PH7_OP_JZ,           /* Jump on zero (FALSE jump) */
  PH7_OP_JNZ,          /* Jump on non-zero (TRUE jump) */
  PH7_OP_POP,          /* Stack POP */ 
  PH7_OP_CAT,          /* Concatenation */
  PH7_OP_CVT_INT,      /* Integer cast */
  PH7_OP_CVT_STR,      /* String cast */
  PH7_OP_CVT_REAL,     /* Float cast */
  PH7_OP_CALL,         /* Function call */
  PH7_OP_UMINUS,       /* Unary minus '-'*/
  PH7_OP_UPLUS,        /* Unary plus '+'*/
  PH7_OP_BITNOT,       /* Bitwise not '~' */
  PH7_OP_LNOT,         /* Logical not '!' */
  PH7_OP_MUL,          /* Multiplication '*' */
  PH7_OP_DIV,          /* Division '/' */
  PH7_OP_MOD,          /* Modulus '%' */
  PH7_OP_ADD,          /* Add '+' */
  PH7_OP_SUB,          /* Sub '-' */
  PH7_OP_SHL,          /* Left shift '<<' */
  PH7_OP_SHR,          /* Right shift '>>' */
  PH7_OP_LT,           /* Less than '<' */
  PH7_OP_LE,           /* Less or equal '<=' */
  PH7_OP_GT,           /* Greater than '>' */
  PH7_OP_GE,           /* Greater or equal '>=' */
  PH7_OP_EQ,           /* Equal '==' */
  PH7_OP_NEQ,          /* Not equal '!=' */
  PH7_OP_TEQ,          /* Type equal '===' */
  PH7_OP_TNE,          /* Type not equal '!==' */
  PH7_OP_BAND,         /* Bitwise and '&' */
  PH7_OP_BXOR,         /* Bitwise xor '^' */
  PH7_OP_BOR,          /* Bitwise or '|' */
  PH7_OP_LAND,         /* Logical and '&&','and' */
  PH7_OP_LOR,          /* Logical or  '||','or' */
  PH7_OP_LXOR,         /* Logical xor 'xor' */
  PH7_OP_STORE,        /* Store Object */
  PH7_OP_STORE_IDX,    /* Store indexed object */
  PH7_OP_STORE_IDX_REF,/* Store indexed object by reference */
  PH7_OP_PULL,         /* Stack pull */
  PH7_OP_SWAP,         /* Stack swap */
  PH7_OP_YIELD,        /* Stack yield */
  PH7_OP_CVT_BOOL,     /* Boolean cast */
  PH7_OP_CVT_NUMC,     /* Numeric (integer,real or both) type cast */
  PH7_OP_INCR,         /* Increment ++ */
  PH7_OP_DECR,         /* Decrement -- */
  PH7_OP_SEQ,          /* 'eq' String equal: Strict string comparison */
  PH7_OP_SNE,          /* 'ne' String not equal: Strict string comparison */
  PH7_OP_NEW,          /* new */
  PH7_OP_CLONE,        /* clone */
  PH7_OP_ADD_STORE,    /* Add and store '+=' */
  PH7_OP_SUB_STORE,    /* Sub and store '-=' */
  PH7_OP_MUL_STORE,    /* Mul and store '*=' */
  PH7_OP_DIV_STORE,    /* Div and store '/=' */
  PH7_OP_MOD_STORE,    /* Mod and store '%=' */
  PH7_OP_CAT_STORE,    /* Cat and store '.=' */
  PH7_OP_SHL_STORE,    /* Shift left and store '>>=' */
  PH7_OP_SHR_STORE,    /* Shift right and store '<<=' */
  PH7_OP_BAND_STORE,   /* Bitand and store '&=' */
  PH7_OP_BOR_STORE,    /* Bitor and store '|=' */
  PH7_OP_BXOR_STORE,   /* Bitxor and store '^=' */
  PH7_OP_CONSUME,      /* Consume VM output */
  PH7_OP_LOAD_REF,     /* Load reference */
  PH7_OP_STORE_REF,    /* Store a reference to a variable*/
  PH7_OP_MEMBER,       /* Class member run-time access */
  PH7_OP_UPLINK,       /* Run-Time frame link */
  PH7_OP_CVT_NULL,     /* NULL cast */
  PH7_OP_CVT_ARRAY,    /* Array cast */
  PH7_OP_CVT_OBJ,      /* Object cast */
  PH7_OP_FOREACH_INIT, /* For each init */
  PH7_OP_FOREACH_STEP, /* For each step */
  PH7_OP_IS_A,         /* Instanceof */
  PH7_OP_LOAD_EXCEPTION,/* Load an exception */
  PH7_OP_POP_EXCEPTION, /* POP an exception */
  PH7_OP_THROW,         /* Throw exception */
  PH7_OP_SWITCH,        /* Switch operation */
  PH7_OP_ERR_CTRL      /* Error control */
};
/* -- END-OF INSTRUCTIONS -- */
/*
 * Expression Operators ID.
 */
enum ph7_expr_id {
	EXPR_OP_NEW = 1,   /* new */
	EXPR_OP_CLONE,     /* clone */
	EXPR_OP_ARROW,     /* -> */
	EXPR_OP_DC,        /* :: */
	EXPR_OP_SUBSCRIPT, /* []: Subscripting */
	EXPR_OP_FUNC_CALL, /* func_call() */
	EXPR_OP_INCR,      /* ++ */
	EXPR_OP_DECR,      /* -- */ 
	EXPR_OP_BITNOT,    /* ~ */
	EXPR_OP_UMINUS,    /* Unary minus  */
	EXPR_OP_UPLUS,     /* Unary plus */
	EXPR_OP_TYPECAST,  /* Type cast [i.e: (int),(float),(string)...] */
	EXPR_OP_ALT,       /* @ */
	EXPR_OP_INSTOF,    /* instanceof */
	EXPR_OP_LOGNOT,    /* logical not ! */
	EXPR_OP_MUL,       /* Multiplication */
	EXPR_OP_DIV,       /* division */
	EXPR_OP_MOD,       /* Modulus */
	EXPR_OP_ADD,       /* Addition */
	EXPR_OP_SUB,       /* Substraction */
	EXPR_OP_DOT,       /* Concatenation */
	EXPR_OP_SHL,       /* Left shift */
	EXPR_OP_SHR,       /* Right shift */
	EXPR_OP_LT,        /* Less than */
	EXPR_OP_LE,        /* Less equal */
	EXPR_OP_GT,        /* Greater than */
	EXPR_OP_GE,        /* Greater equal */
	EXPR_OP_EQ,        /* Equal == */
	EXPR_OP_NE,        /* Not equal != <> */
	EXPR_OP_TEQ,       /* Type equal === */
	EXPR_OP_TNE,       /* Type not equal !== */
	EXPR_OP_SEQ,       /* String equal 'eq' */
	EXPR_OP_SNE,       /* String not equal 'ne' */
	EXPR_OP_BAND,      /* Biwise and '&' */
	EXPR_OP_REF,       /* Reference operator '&' */
	EXPR_OP_XOR,       /* bitwise xor '^' */
	EXPR_OP_BOR,       /* bitwise or '|' */
	EXPR_OP_LAND,      /* Logical and '&&','and' */
	EXPR_OP_LOR,       /* Logical or  '||','or'*/
	EXPR_OP_LXOR,      /* Logical xor 'xor' */
	EXPR_OP_QUESTY,    /* Ternary operator '?' */
	EXPR_OP_ASSIGN,    /* Assignment '=' */
	EXPR_OP_ADD_ASSIGN, /* Combined operator: += */
	EXPR_OP_SUB_ASSIGN, /* Combined operator: -= */
	EXPR_OP_MUL_ASSIGN, /* Combined operator: *= */
	EXPR_OP_DIV_ASSIGN, /* Combined operator: /= */
	EXPR_OP_MOD_ASSIGN, /* Combined operator: %= */
	EXPR_OP_DOT_ASSIGN, /* Combined operator: .= */
	EXPR_OP_AND_ASSIGN, /* Combined operator: &= */
	EXPR_OP_OR_ASSIGN,  /* Combined operator: |= */
	EXPR_OP_XOR_ASSIGN, /* Combined operator: ^= */
	EXPR_OP_SHL_ASSIGN, /* Combined operator: <<= */
	EXPR_OP_SHR_ASSIGN, /* Combined operator: >>= */
	EXPR_OP_COMMA       /* Comma expression */
};
/*
 * Very high level tokens.
 */
#define PH7_TOKEN_RAW 0x001 /* Raw text [i.e: HTML,XML...] */
#define PH7_TOKEN_PHP 0x002 /* PHP chunk */
/*
 * Lexer token codes
 * The following set of constants are the tokens recognized
 * by the lexer when processing PHP input.
 * Important: Token values MUST BE A POWER OF TWO.
 */
#define PH7_TK_INTEGER   0x0000001  /* Integer */
#define PH7_TK_REAL      0x0000002  /* Real number */
#define PH7_TK_NUM       (PH7_TK_INTEGER|PH7_TK_REAL) /* Numeric token,either integer or real */
#define PH7_TK_KEYWORD   0x0000004 /* Keyword [i.e: while,for,if,foreach...] */
#define PH7_TK_ID        0x0000008 /* Alphanumeric or UTF-8 stream */
#define PH7_TK_DOLLAR    0x0000010 /* '$' Dollar sign */
#define PH7_TK_OP        0x0000020 /* Operator [i.e: +,*,/...] */
#define PH7_TK_OCB       0x0000040 /* Open curly brace'{' */
#define PH7_TK_CCB       0x0000080 /* Closing curly brace'}' */
#define PH7_TK_NSSEP     0x0000100 /* Namespace separator '\' */
#define PH7_TK_LPAREN    0x0000200 /* Left parenthesis '(' */
#define PH7_TK_RPAREN    0x0000400 /* Right parenthesis ')' */
#define PH7_TK_OSB       0x0000800 /* Open square bracket '[' */
#define PH7_TK_CSB       0x0001000 /* Closing square bracket ']' */
#define PH7_TK_DSTR      0x0002000 /* Double quoted string "$str" */
#define PH7_TK_SSTR      0x0004000 /* Single quoted string 'str' */
#define PH7_TK_HEREDOC   0x0008000 /* Heredoc <<< */
#define PH7_TK_NOWDOC    0x0010000 /* Nowdoc <<< */
#define PH7_TK_COMMA     0x0020000 /* Comma ',' */
#define PH7_TK_SEMI      0x0040000 /* Semi-colon ";" */
#define PH7_TK_BSTR      0x0080000 /* Backtick quoted string [i.e: Shell command `date`] */
#define PH7_TK_COLON     0x0100000 /* single Colon ':' */
#define PH7_TK_AMPER     0x0200000 /* Ampersand '&' */
#define PH7_TK_EQUAL     0x0400000 /* Equal '=' */
#define PH7_TK_ARRAY_OP  0x0800000 /* Array operator '=>' */
#define PH7_TK_OTHER     0x1000000 /* Other symbols */
/*
 * PHP keyword.
 * These words have special meaning in PHP. Some of them represent things which look like
 * functions, some look like constants, and so on, but they're not, really: they are language constructs.
 * You cannot use any of the following words as constants, class names, function or method names.
 * Using them as variable names is generally OK, but could lead to confusion. 
 */
#define PH7_TKWRD_EXTENDS      1 /* extends */
#define PH7_TKWRD_ENDSWITCH    2 /* endswitch */
#define PH7_TKWRD_SWITCH       3 /* switch */
#define PH7_TKWRD_PRINT        4 /* print */
#define PH7_TKWRD_INTERFACE    5 /* interface */
#define PH7_TKWRD_ENDDEC       6 /* enddeclare */
#define PH7_TKWRD_DECLARE      7 /* declare */
/* The number '8' is reserved for PH7_TK_ID */
#define PH7_TKWRD_REQONCE      9 /* require_once */
#define PH7_TKWRD_REQUIRE      10 /* require */
#define PH7_TKWRD_ELIF         0x4000000 /* elseif: MUST BE A POWER OF TWO */
#define PH7_TKWRD_ELSE         0x8000000 /* else:  MUST BE A POWER OF TWO */
#define PH7_TKWRD_IF           13 /* if */
#define PH7_TKWRD_FINAL        14 /* final */
#define PH7_TKWRD_LIST         15 /* list */
#define PH7_TKWRD_STATIC       16 /* static */
#define PH7_TKWRD_CASE         17 /* case */
#define PH7_TKWRD_SELF         18 /* self */
#define PH7_TKWRD_FUNCTION     19 /* function */
#define PH7_TKWRD_NAMESPACE    20 /* namespace */
#define PH7_TKWRD_ENDIF        0x400000 /* endif: MUST BE A POWER OF TWO */
#define PH7_TKWRD_CLONE        0x80 /* clone: MUST BE A POWER OF TWO  */
#define PH7_TKWRD_NEW          0x100 /* new: MUST BE A POWER OF TWO  */
#define PH7_TKWRD_CONST        22 /* const */
#define PH7_TKWRD_THROW        23 /* throw */
#define PH7_TKWRD_USE          24 /* use */
#define PH7_TKWRD_ENDWHILE     0x800000 /* endwhile: MUST BE A POWER OF TWO */
#define PH7_TKWRD_WHILE        26 /* while */
#define PH7_TKWRD_EVAL         27 /* eval */
#define PH7_TKWRD_VAR          28 /* var */
#define PH7_TKWRD_ARRAY        0x200 /* array: MUST BE A POWER OF TWO */
#define PH7_TKWRD_ABSTRACT     29 /* abstract */
#define PH7_TKWRD_TRY          30 /* try */
#define PH7_TKWRD_AND          0x400 /* and: MUST BE A POWER OF TWO  */
#define PH7_TKWRD_DEFAULT      31 /* default */
#define PH7_TKWRD_CLASS        32 /* class */
#define PH7_TKWRD_AS           33 /* as */
#define PH7_TKWRD_CONTINUE     34 /* continue */
#define PH7_TKWRD_EXIT         35 /* exit */
#define PH7_TKWRD_DIE          36 /* die */
#define PH7_TKWRD_ECHO         37 /* echo */
#define PH7_TKWRD_GLOBAL       38 /* global */
#define PH7_TKWRD_IMPLEMENTS   39 /* implements */
#define PH7_TKWRD_INCONCE      40 /* include_once */
#define PH7_TKWRD_INCLUDE      41 /* include */
#define PH7_TKWRD_EMPTY        42 /* empty */
#define PH7_TKWRD_INSTANCEOF   0x800 /* instanceof: MUST BE A POWER OF TWO  */
#define PH7_TKWRD_ISSET        43 /* isset */
#define PH7_TKWRD_PARENT       44 /* parent */
#define PH7_TKWRD_PRIVATE      45 /* private */
#define PH7_TKWRD_ENDFOR       0x1000000 /* endfor: MUST BE A POWER OF TWO */
#define PH7_TKWRD_END4EACH     0x2000000 /* endforeach: MUST BE A POWER OF TWO */
#define PH7_TKWRD_FOR          48 /* for */
#define PH7_TKWRD_FOREACH      49 /* foreach */
#define PH7_TKWRD_OR           0x1000 /* or: MUST BE A POWER OF TWO  */
#define PH7_TKWRD_PROTECTED    50 /* protected */
#define PH7_TKWRD_DO           51 /* do */
#define PH7_TKWRD_PUBLIC       52 /* public */
#define PH7_TKWRD_CATCH        53 /* catch */
#define PH7_TKWRD_RETURN       54 /* return */
#define PH7_TKWRD_UNSET        0x2000 /* unset: MUST BE A POWER OF TWO  */
#define PH7_TKWRD_XOR          0x4000 /* xor: MUST BE A POWER OF TWO  */ 
#define PH7_TKWRD_BREAK        55 /* break */
#define PH7_TKWRD_GOTO         56 /* goto */
#define PH7_TKWRD_BOOL         0x8000  /* bool:  MUST BE A POWER OF TWO */
#define PH7_TKWRD_INT          0x10000  /* int:   MUST BE A POWER OF TWO */
#define PH7_TKWRD_FLOAT        0x20000  /* float:  MUST BE A POWER OF TWO */
#define PH7_TKWRD_STRING       0x40000  /* string: MUST BE A POWER OF TWO */
#define PH7_TKWRD_OBJECT       0x80000 /* object: MUST BE A POWER OF TWO */
#define PH7_TKWRD_SEQ          0x100000 /* String string comparison operator: 'eq' equal MUST BE A POWER OF TWO */
#define PH7_TKWRD_SNE          0x200000 /* String string comparison operator: 'ne' not equal MUST BE A POWER OF TWO */
/* JSON encoding/decoding related definition */
enum json_err_code{
	JSON_ERROR_NONE = 0,  /* No error has occurred. */
	JSON_ERROR_DEPTH,     /* The maximum stack depth has been exceeded.  */
	JSON_ERROR_STATE_MISMATCH, /* Occurs with underflow or with the modes mismatch.  */
	JSON_ERROR_CTRL_CHAR, /* Control character error, possibly incorrectly encoded.  */
	JSON_ERROR_SYNTAX,    /* Syntax error. */
	JSON_ERROR_UTF8       /* Malformed UTF-8 characters */
};
/* The following constants can be combined to form options for json_encode(). */
#define	JSON_HEX_TAG           0x01  /* All < and > are converted to \u003C and \u003E. */
#define JSON_HEX_AMP           0x02  /* All &s are converted to \u0026. */
#define JSON_HEX_APOS          0x04  /* All ' are converted to \u0027. */
#define JSON_HEX_QUOT          0x08  /* All " are converted to \u0022. */
#define JSON_FORCE_OBJECT      0x10  /* Outputs an object rather than an array */
#define JSON_NUMERIC_CHECK     0x20  /* Encodes numeric strings as numbers. */ 
#define JSON_BIGINT_AS_STRING  0x40  /* Not used */
#define JSON_PRETTY_PRINT      0x80  /* Use whitespace in returned data to format it.*/ 
#define JSON_UNESCAPED_SLASHES 0x100 /* Don't escape '/' */
#define JSON_UNESCAPED_UNICODE 0x200 /* Not used */
/* memobj.c function prototypes */
PH7_PRIVATE sxi32 PH7_MemObjDump(SyBlob *pOut,ph7_value *pObj,int ShowType,int nTab,int nDepth,int isRef);
PH7_PRIVATE const char * PH7_MemObjTypeDump(ph7_value *pVal);
PH7_PRIVATE sxi32 PH7_MemObjAdd(ph7_value *pObj1,ph7_value *pObj2,int bAddStore);
PH7_PRIVATE sxi32 PH7_MemObjCmp(ph7_value *pObj1,ph7_value *pObj2,int bStrict,int iNest);
PH7_PRIVATE sxi32 PH7_MemObjInitFromString(ph7_vm *pVm,ph7_value *pObj,const SyString *pVal);
PH7_PRIVATE sxi32 PH7_MemObjInitFromArray(ph7_vm *pVm,ph7_value *pObj,ph7_hashmap *pArray);
#if 0
/* Not used in the current release of the PH7 engine */
PH7_PRIVATE sxi32 PH7_MemObjInitFromReal(ph7_vm *pVm,ph7_value *pObj,ph7_real rVal);
#endif
PH7_PRIVATE sxi32 PH7_MemObjInitFromInt(ph7_vm *pVm,ph7_value *pObj,sxi64 iVal);
PH7_PRIVATE sxi32 PH7_MemObjInitFromBool(ph7_vm *pVm,ph7_value *pObj,sxi32 iVal);
PH7_PRIVATE sxi32 PH7_MemObjInit(ph7_vm *pVm,ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjStringAppend(ph7_value *pObj,const char *zData,sxu32 nLen);
#if 0
/* Not used in the current release of the PH7 engine */
PH7_PRIVATE sxi32 PH7_MemObjStringFormat(ph7_value *pObj,const char *zFormat,va_list ap);
#endif
PH7_PRIVATE sxi32 PH7_MemObjStore(ph7_value *pSrc,ph7_value *pDest);
PH7_PRIVATE sxi32 PH7_MemObjLoad(ph7_value *pSrc,ph7_value *pDest);
PH7_PRIVATE sxi32 PH7_MemObjRelease(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToNumeric(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjTryInteger(ph7_value *pObj);
PH7_PRIVATE ProcMemObjCast PH7_MemObjCastMethod(sxi32 iFlags);
PH7_PRIVATE sxi32 PH7_MemObjIsNumeric(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjIsEmpty(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToHashmap(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToObject(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToString(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToNull(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToReal(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToInteger(ph7_value *pObj);
PH7_PRIVATE sxi32 PH7_MemObjToBool(ph7_value *pObj);
PH7_PRIVATE sxi64 PH7_TokenValueToInt64(SyString *pData);
/* lex.c function prototypes */
PH7_PRIVATE sxi32 PH7_TokenizeRawText(const char *zInput,sxu32 nLen,SySet *pOut);
PH7_PRIVATE sxi32 PH7_TokenizePHP(const char *zInput,sxu32 nLen,sxu32 nLineStart,SySet *pOut);
/* vm.c function prototypes */
PH7_PRIVATE void PH7_VmReleaseContextValue(ph7_context *pCtx,ph7_value *pValue);
PH7_PRIVATE sxi32 PH7_VmInitFuncState(ph7_vm *pVm,ph7_vm_func *pFunc,const char *zName,sxu32 nByte,
	sxi32 iFlags,void *pUserData);
PH7_PRIVATE sxi32 PH7_VmInstallUserFunction(ph7_vm *pVm,ph7_vm_func *pFunc,SyString *pName);
PH7_PRIVATE sxi32 PH7_VmCreateClassInstanceFrame(ph7_vm *pVm,ph7_class_instance *pObj);
PH7_PRIVATE sxi32 PH7_VmRefObjRemove(ph7_vm *pVm,sxu32 nIdx,SyHashEntry *pEntry,ph7_hashmap_node *pMapEntry);
PH7_PRIVATE sxi32 PH7_VmRefObjInstall(ph7_vm *pVm,sxu32 nIdx,SyHashEntry *pEntry,ph7_hashmap_node *pMapEntry,sxi32 iFlags);
PH7_PRIVATE sxi32 PH7_VmPushFilePath(ph7_vm *pVm,const char *zPath,int nLen,sxu8 bMain,sxi32 *pNew);
PH7_PRIVATE ph7_class * PH7_VmExtractClass(ph7_vm *pVm,const char *zName,sxu32 nByte,sxi32 iLoadable,sxi32 iNest);
PH7_PRIVATE sxi32 PH7_VmRegisterConstant(ph7_vm *pVm,const SyString *pName,ProcConstant xExpand,void *pUserData);
PH7_PRIVATE sxi32 PH7_VmInstallForeignFunction(ph7_vm *pVm,const SyString *pName,ProchHostFunction xFunc,void *pUserData);
PH7_PRIVATE sxi32 PH7_VmInstallClass(ph7_vm *pVm,ph7_class *pClass);
PH7_PRIVATE sxi32 PH7_VmBlobConsumer(const void *pSrc,unsigned int nLen,void *pUserData);
PH7_PRIVATE ph7_value * PH7_ReserveMemObj(ph7_vm *pVm);
PH7_PRIVATE ph7_value * PH7_ReserveConstObj(ph7_vm *pVm,sxu32 *pIndex);
PH7_PRIVATE sxi32 PH7_VmOutputConsume(ph7_vm *pVm,SyString *pString);
PH7_PRIVATE sxi32 PH7_VmOutputConsumeAp(ph7_vm *pVm,const char *zFormat,va_list ap);
PH7_PRIVATE sxi32 PH7_VmThrowErrorAp(ph7_vm *pVm,SyString *pFuncName,sxi32 iErr,const char *zFormat,va_list ap);
PH7_PRIVATE sxi32 PH7_VmThrowError(ph7_vm *pVm,SyString *pFuncName,sxi32 iErr,const char *zMessage);
PH7_PRIVATE void  PH7_VmExpandConstantValue(ph7_value *pVal,void *pUserData);
PH7_PRIVATE sxi32 PH7_VmDump(ph7_vm *pVm,ProcConsumer xConsumer,void *pUserData);
PH7_PRIVATE sxi32 PH7_VmInit(ph7_vm *pVm,ph7 *pEngine);
PH7_PRIVATE sxi32 PH7_VmConfigure(ph7_vm *pVm,sxi32 nOp,va_list ap);
PH7_PRIVATE sxi32 PH7_VmByteCodeExec(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_VmRelease(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_VmReset(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_VmMakeReady(ph7_vm *pVm);
PH7_PRIVATE sxu32 PH7_VmInstrLength(ph7_vm *pVm);
PH7_PRIVATE VmInstr * PH7_VmPopInstr(ph7_vm *pVm);
PH7_PRIVATE VmInstr * PH7_VmPeekInstr(ph7_vm *pVm);
PH7_PRIVATE VmInstr * PH7_VmPeekNextInstr(ph7_vm *pVm);
PH7_PRIVATE VmInstr *PH7_VmGetInstr(ph7_vm *pVm,sxu32 nIndex);
PH7_PRIVATE SySet * PH7_VmGetByteCodeContainer(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_VmSetByteCodeContainer(ph7_vm *pVm,SySet *pContainer);
PH7_PRIVATE sxi32 PH7_VmEmitInstr(ph7_vm *pVm,sxi32 iOp,sxi32 iP1,sxu32 iP2,void *p3,sxu32 *pIndex);
PH7_PRIVATE sxu32 PH7_VmRandomNum(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_VmCallClassMethod(ph7_vm *pVm,ph7_class_instance *pThis,ph7_class_method *pMethod,
	ph7_value *pResult,int nArg,ph7_value **apArg);
PH7_PRIVATE sxi32 PH7_VmCallUserFunction(ph7_vm *pVm,ph7_value *pFunc,int nArg,ph7_value **apArg,ph7_value *pResult);
PH7_PRIVATE sxi32 PH7_VmCallUserFunctionAp(ph7_vm *pVm,ph7_value *pFunc,ph7_value *pResult,...);
PH7_PRIVATE sxi32 PH7_VmUnsetMemObj(ph7_vm *pVm,sxu32 nObjIdx,int bForce);
PH7_PRIVATE void PH7_VmRandomString(ph7_vm *pVm,char *zBuf,int nLen);
PH7_PRIVATE ph7_class * PH7_VmPeekTopClass(ph7_vm *pVm);
PH7_PRIVATE int PH7_VmIsCallable(ph7_vm *pVm,ph7_value *pValue,int CallInvoke);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE const ph7_io_stream * PH7_VmGetStreamDevice(ph7_vm *pVm,const char **pzDevice,int nByte);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE int PH7_Utf8Read(
  const unsigned char *z,         /* First byte of UTF-8 character */
  const unsigned char *zTerm,     /* Pretend this byte is 0x00 */
  const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
);
/* parse.c function prototypes */
PH7_PRIVATE int PH7_IsLangConstruct(sxu32 nKeyID,sxu8 bCheckFunc);
PH7_PRIVATE sxi32 PH7_ExprMakeTree(ph7_gen_state *pGen,SySet *pExprNode,ph7_expr_node **ppRoot);
PH7_PRIVATE sxi32 PH7_GetNextExpr(SyToken *pStart,SyToken *pEnd,SyToken **ppNext);
PH7_PRIVATE void PH7_DelimitNestedTokens(SyToken *pIn,SyToken *pEnd,sxu32 nTokStart,sxu32 nTokEnd,SyToken **ppEnd);
PH7_PRIVATE const ph7_expr_op * PH7_ExprExtractOperator(SyString *pStr,SyToken *pLast);
PH7_PRIVATE sxi32 PH7_ExprFreeTree(ph7_gen_state *pGen,SySet *pNodeSet);
/* compile.c function prototypes */
PH7_PRIVATE ProcNodeConstruct PH7_GetNodeHandler(sxu32 nNodeType);
PH7_PRIVATE sxi32 PH7_CompileLangConstruct(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileVariable(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileLiteral(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileSimpleString(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileString(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileArray(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileList(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_CompileAnnonFunc(ph7_gen_state *pGen,sxi32 iCompileFlag);
PH7_PRIVATE sxi32 PH7_InitCodeGenerator(ph7_vm *pVm,ProcConsumer xErr,void *pErrData);
PH7_PRIVATE sxi32 PH7_ResetCodeGenerator(ph7_vm *pVm,ProcConsumer xErr,void *pErrData);
PH7_PRIVATE sxi32 PH7_GenCompileError(ph7_gen_state *pGen,sxi32 nErrType,sxu32 nLine,const char *zFormat,...);
PH7_PRIVATE sxi32 PH7_CompileScript(ph7_vm *pVm,SyString *pScript,sxi32 iFlags);
/* constant.c function prototypes */
PH7_PRIVATE void PH7_RegisterBuiltInConstant(ph7_vm *pVm);
/* builtin.c function prototypes */
PH7_PRIVATE void PH7_RegisterBuiltInFunction(ph7_vm *pVm);
/* hashmap.c function prototypes */
PH7_PRIVATE ph7_hashmap * PH7_NewHashmap(ph7_vm *pVm,sxu32 (*xIntHash)(sxi64),sxu32 (*xBlobHash)(const void *,sxu32));
PH7_PRIVATE sxi32 PH7_HashmapCreateSuper(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_HashmapRelease(ph7_hashmap *pMap,int FreeDS);
PH7_PRIVATE void  PH7_HashmapUnref(ph7_hashmap *pMap);
PH7_PRIVATE sxi32 PH7_HashmapLookup(ph7_hashmap *pMap,ph7_value *pKey,ph7_hashmap_node **ppNode);
PH7_PRIVATE sxi32 PH7_HashmapInsert(ph7_hashmap *pMap,ph7_value *pKey,ph7_value *pVal);
PH7_PRIVATE sxi32 PH7_HashmapInsertByRef(ph7_hashmap *pMap,ph7_value *pKey,sxu32 nRefIdx);
PH7_PRIVATE sxi32 PH7_HashmapUnion(ph7_hashmap *pLeft,ph7_hashmap *pRight);
PH7_PRIVATE void PH7_HashmapUnlinkNode(ph7_hashmap_node *pNode,int bRestore);
PH7_PRIVATE sxi32 PH7_HashmapDup(ph7_hashmap *pSrc,ph7_hashmap *pDest);
PH7_PRIVATE sxi32 PH7_HashmapCmp(ph7_hashmap *pLeft,ph7_hashmap *pRight,int bStrict);
PH7_PRIVATE void PH7_HashmapResetLoopCursor(ph7_hashmap *pMap);
PH7_PRIVATE ph7_hashmap_node * PH7_HashmapGetNextEntry(ph7_hashmap *pMap);
PH7_PRIVATE void PH7_HashmapExtractNodeValue(ph7_hashmap_node *pNode,ph7_value *pValue,int bStore);
PH7_PRIVATE void PH7_HashmapExtractNodeKey(ph7_hashmap_node *pNode,ph7_value *pKey);
PH7_PRIVATE void PH7_RegisterHashmapFunctions(ph7_vm *pVm);
PH7_PRIVATE sxi32 PH7_HashmapDump(SyBlob *pOut,ph7_hashmap *pMap,int ShowType,int nTab,int nDepth);
PH7_PRIVATE sxi32 PH7_HashmapWalk(ph7_hashmap *pMap,int (*xWalk)(ph7_value *,ph7_value *,void *),void *pUserData);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE int PH7_HashmapValuesToSet(ph7_hashmap *pMap,SySet *pOut);
/* builtin.c function prototypes */ 
PH7_PRIVATE sxi32 PH7_InputFormat(int (*xConsumer)(ph7_context *,const char *,int,void *),
	ph7_context *pCtx,const char *zIn,int nByte,int nArg,ph7_value **apArg,void *pUserData,int vf);
PH7_PRIVATE sxi32 PH7_ProcessCsv(const char *zInput,int nByte,int delim,int encl,
	int escape,sxi32 (*xConsumer)(const char *,int,void *),void *pUserData);
PH7_PRIVATE sxi32 PH7_CsvConsumer(const char *zToken,int nTokenLen,void *pUserData);
PH7_PRIVATE sxi32 PH7_StripTagsFromString(ph7_context *pCtx,const char *zIn,int nByte,const char *zTaglist,int nTaglen);
PH7_PRIVATE sxi32 PH7_ParseIniString(ph7_context *pCtx,const char *zIn,sxu32 nByte,int bProcessSection);
#endif
/* oo.c function prototypes */
PH7_PRIVATE ph7_class * PH7_NewRawClass(ph7_vm *pVm,const SyString *pName,sxu32 nLine);
PH7_PRIVATE ph7_class_attr * PH7_NewClassAttr(ph7_vm *pVm,const SyString *pName,sxu32 nLine,sxi32 iProtection,sxi32 iFlags);
PH7_PRIVATE ph7_class_method * PH7_NewClassMethod(ph7_vm *pVm,ph7_class *pClass,const SyString *pName,sxu32 nLine,
	sxi32 iProtection,sxi32 iFlags,sxi32 iFuncFlags);
PH7_PRIVATE ph7_class_method * PH7_ClassExtractMethod(ph7_class *pClass,const char *zName,sxu32 nByte);
PH7_PRIVATE ph7_class_attr   * PH7_ClassExtractAttribute(ph7_class *pClass,const char *zName,sxu32 nByte);
PH7_PRIVATE sxi32 PH7_ClassInstallAttr(ph7_class *pClass,ph7_class_attr *pAttr);
PH7_PRIVATE sxi32 PH7_ClassInstallMethod(ph7_class *pClass,ph7_class_method *pMeth);
PH7_PRIVATE sxi32 PH7_ClassInherit(ph7_gen_state *pGen,ph7_class *pSub,ph7_class *pBase);
PH7_PRIVATE sxi32 PH7_ClassInterfaceInherit(ph7_class *pSub,ph7_class *pBase);
PH7_PRIVATE sxi32 PH7_ClassImplement(ph7_class *pMain,ph7_class *pInterface);
PH7_PRIVATE ph7_class_instance * PH7_NewClassInstance(ph7_vm *pVm,ph7_class *pClass);
PH7_PRIVATE ph7_class_instance * PH7_CloneClassInstance(ph7_class_instance *pSrc);
PH7_PRIVATE sxi32 PH7_ClassInstanceCmp(ph7_class_instance *pLeft,ph7_class_instance *pRight,int bStrict,int iNest);
PH7_PRIVATE void  PH7_ClassInstanceUnref(ph7_class_instance *pThis);
PH7_PRIVATE sxi32 PH7_ClassInstanceDump(SyBlob *pOut,ph7_class_instance *pThis,int ShowType,int nTab,int nDepth);
PH7_PRIVATE sxi32 PH7_ClassInstanceCallMagicMethod(ph7_vm *pVm,ph7_class *pClass,ph7_class_instance *pThis,const char *zMethod,
	sxu32 nByte,const SyString *pAttrName);
PH7_PRIVATE ph7_value * PH7_ClassInstanceExtractAttrValue(ph7_class_instance *pThis,VmClassAttr *pAttr);
PH7_PRIVATE sxi32 PH7_ClassInstanceToHashmap(ph7_class_instance *pThis,ph7_hashmap *pMap);
PH7_PRIVATE sxi32 PH7_ClassInstanceWalk(ph7_class_instance *pThis,
	int (*xWalk)(const char *,ph7_value *,void *),void *pUserData);
PH7_PRIVATE ph7_value * PH7_ClassInstanceFetchAttr(ph7_class_instance *pThis,const SyString *pName);
/* vfs.c */
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE void * PH7_StreamOpenHandle(ph7_vm *pVm,const ph7_io_stream *pStream,const char *zFile,
	int iFlags,int use_include,ph7_value *pResource,int bPushInclude,int *pNew);
PH7_PRIVATE sxi32 PH7_StreamReadWholeFile(void *pHandle,const ph7_io_stream *pStream,SyBlob *pOut);
PH7_PRIVATE void PH7_StreamCloseHandle(const ph7_io_stream *pStream,void *pHandle);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE const char * PH7_ExtractDirName(const char *zPath,int nByte,int *pLen);
PH7_PRIVATE sxi32 PH7_RegisterIORoutine(ph7_vm *pVm);
PH7_PRIVATE const ph7_vfs * PH7_ExportBuiltinVfs(void);
PH7_PRIVATE void * PH7_ExportStdin(ph7_vm *pVm);
PH7_PRIVATE void * PH7_ExportStdout(ph7_vm *pVm);
PH7_PRIVATE void * PH7_ExportStderr(ph7_vm *pVm);
/* lib.c function prototypes */
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyXMLParserInit(SyXMLParser *pParser,SyMemBackend *pAllocator,sxi32 iFlags);
PH7_PRIVATE sxi32 SyXMLParserSetEventHandler(SyXMLParser *pParser,
	void *pUserData,
	ProcXMLStartTagHandler xStartTag,
	ProcXMLTextHandler xRaw,
	ProcXMLSyntaxErrorHandler xErr,
	ProcXMLStartDocument xStartDoc,
	ProcXMLEndTagHandler xEndTag,
	ProcXMLPIHandler xPi,
	ProcXMLEndDocument xEndDoc,
	ProcXMLDoctypeHandler xDoctype,
	ProcXMLNameSpaceStart xNameSpace,
	ProcXMLNameSpaceEnd xNameSpaceEnd
	);
PH7_PRIVATE sxi32 SyXMLProcess(SyXMLParser *pParser,const char *zInput,sxu32 nByte);
PH7_PRIVATE sxi32 SyXMLParserRelease(SyXMLParser *pParser);
PH7_PRIVATE sxi32 SyArchiveInit(SyArchive *pArch,SyMemBackend *pAllocator,ProcHash xHash,ProcRawStrCmp xCmp);
PH7_PRIVATE sxi32 SyArchiveRelease(SyArchive *pArch);
PH7_PRIVATE sxi32 SyArchiveResetLoopCursor(SyArchive *pArch);
PH7_PRIVATE sxi32 SyArchiveGetNextEntry(SyArchive *pArch,SyArchiveEntry **ppEntry);
PH7_PRIVATE sxi32 SyZipExtractFromBuf(SyArchive *pArch,const char *zBuf,sxu32 nLen);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyBinToHexConsumer(const void *pIn,sxu32 nLen,ProcConsumer xConsumer,void *pConsumerData);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_HASH_FUNC
PH7_PRIVATE sxu32 SyCrc32(const void *pSrc,sxu32 nLen);
PH7_PRIVATE void MD5Update(MD5Context *ctx, const unsigned char *buf, unsigned int len);
PH7_PRIVATE void MD5Final(unsigned char digest[16], MD5Context *ctx);
PH7_PRIVATE sxi32 MD5Init(MD5Context *pCtx);
PH7_PRIVATE sxi32 SyMD5Compute(const void *pIn,sxu32 nLen,unsigned char zDigest[16]);
PH7_PRIVATE void SHA1Init(SHA1Context *context);
PH7_PRIVATE void SHA1Update(SHA1Context *context,const unsigned char *data,unsigned int len);
PH7_PRIVATE void SHA1Final(SHA1Context *context, unsigned char digest[20]);
PH7_PRIVATE sxi32 SySha1Compute(const void *pIn,sxu32 nLen,unsigned char zDigest[20]);
#endif
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE sxi32 SyRandomness(SyPRNGCtx *pCtx,void *pBuf,sxu32 nLen);
PH7_PRIVATE sxi32 SyRandomnessInit(SyPRNGCtx *pCtx,ProcRandomSeed xSeed,void *pUserData);
PH7_PRIVATE sxu32 SyBufferFormat(char *zBuf,sxu32 nLen,const char *zFormat,...);
PH7_PRIVATE sxu32 SyBlobFormatAp(SyBlob *pBlob,const char *zFormat,va_list ap);
PH7_PRIVATE sxu32 SyBlobFormat(SyBlob *pBlob,const char *zFormat,...);
PH7_PRIVATE sxi32 SyProcFormat(ProcConsumer xConsumer,void *pData,const char *zFormat,...);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE const char *SyTimeGetMonth(sxi32 iMonth);
PH7_PRIVATE const char *SyTimeGetDay(sxi32 iDay);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE sxi32 SyUriDecode(const char *zSrc,sxu32 nLen,ProcConsumer xConsumer,void *pUserData,int bUTF8);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyUriEncode(const char *zSrc,sxu32 nLen,ProcConsumer xConsumer,void *pUserData);
#endif
PH7_PRIVATE sxi32 SyLexRelease(SyLex *pLex);
PH7_PRIVATE sxi32 SyLexTokenizeInput(SyLex *pLex,const char *zInput,sxu32 nLen,void *pCtxData,ProcSort xSort,ProcCmp xCmp);
PH7_PRIVATE sxi32 SyLexInit(SyLex *pLex,SySet *pSet,ProcTokenizer xTokenizer,void *pUserData);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyBase64Decode(const char *zB64,sxu32 nLen,ProcConsumer xConsumer,void *pUserData);
PH7_PRIVATE sxi32 SyBase64Encode(const char *zSrc,sxu32 nLen,ProcConsumer xConsumer,void *pUserData);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE sxi32 SyStrToReal(const char *zSrc,sxu32 nLen,void *pOutVal,const char **zRest);
PH7_PRIVATE sxi32 SyBinaryStrToInt64(const char *zSrc,sxu32 nLen,void *pOutVal,const char **zRest);
PH7_PRIVATE sxi32 SyOctalStrToInt64(const char *zSrc,sxu32 nLen,void *pOutVal,const char **zRest);
PH7_PRIVATE sxi32 SyHexStrToInt64(const char *zSrc,sxu32 nLen,void *pOutVal,const char **zRest);
PH7_PRIVATE sxi32 SyHexToint(sxi32 c);
PH7_PRIVATE sxi32 SyStrToInt64(const char *zSrc,sxu32 nLen,void *pOutVal,const char **zRest);
PH7_PRIVATE sxi32 SyStrToInt32(const char *zSrc,sxu32 nLen,void *pOutVal,const char **zRest);
PH7_PRIVATE sxi32 SyStrIsNumeric(const char *zSrc,sxu32 nLen,sxu8 *pReal,const char **pzTail);
PH7_PRIVATE SyHashEntry *SyHashLastEntry(SyHash *pHash);
PH7_PRIVATE sxi32 SyHashInsert(SyHash *pHash,const void *pKey,sxu32 nKeyLen,void *pUserData);
PH7_PRIVATE sxi32 SyHashForEach(SyHash *pHash,sxi32(*xStep)(SyHashEntry *,void *),void *pUserData);
PH7_PRIVATE SyHashEntry *SyHashGetNextEntry(SyHash *pHash);
PH7_PRIVATE sxi32 SyHashResetLoopCursor(SyHash *pHash);
PH7_PRIVATE sxi32 SyHashDeleteEntry2(SyHashEntry *pEntry);
PH7_PRIVATE sxi32 SyHashDeleteEntry(SyHash *pHash,const void *pKey,sxu32 nKeyLen,void **ppUserData);
PH7_PRIVATE SyHashEntry *SyHashGet(SyHash *pHash,const void *pKey,sxu32 nKeyLen);
PH7_PRIVATE sxi32 SyHashRelease(SyHash *pHash);
PH7_PRIVATE sxi32 SyHashInit(SyHash *pHash,SyMemBackend *pAllocator,ProcHash xHash,ProcCmp xCmp);
PH7_PRIVATE sxu32 SyStrHash(const void *pSrc,sxu32 nLen);
PH7_PRIVATE void *SySetAt(SySet *pSet,sxu32 nIdx);
PH7_PRIVATE void *SySetPop(SySet *pSet);
PH7_PRIVATE void *SySetPeek(SySet *pSet);
PH7_PRIVATE sxi32 SySetRelease(SySet *pSet);
PH7_PRIVATE sxi32 SySetReset(SySet *pSet);
PH7_PRIVATE sxi32 SySetResetCursor(SySet *pSet);
PH7_PRIVATE sxi32 SySetGetNextEntry(SySet *pSet,void **ppEntry);
#ifndef PH7_DISABLE_BUILTIN_FUNC 
PH7_PRIVATE void * SySetPeekCurrentEntry(SySet *pSet);
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE sxi32 SySetTruncate(SySet *pSet,sxu32 nNewSize);
PH7_PRIVATE sxi32 SySetAlloc(SySet *pSet,sxi32 nItem);
PH7_PRIVATE sxi32 SySetPut(SySet *pSet,const void *pItem);
PH7_PRIVATE sxi32 SySetInit(SySet *pSet,SyMemBackend *pAllocator,sxu32 ElemSize);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyBlobSearch(const void *pBlob,sxu32 nLen,const void *pPattern,sxu32 pLen,sxu32 *pOfft);
#endif
PH7_PRIVATE sxi32 SyBlobRelease(SyBlob *pBlob);
PH7_PRIVATE sxi32 SyBlobReset(SyBlob *pBlob);
PH7_PRIVATE sxi32 SyBlobCmp(SyBlob *pLeft,SyBlob *pRight);
PH7_PRIVATE sxi32 SyBlobDup(SyBlob *pSrc,SyBlob *pDest);
PH7_PRIVATE sxi32 SyBlobNullAppend(SyBlob *pBlob);
PH7_PRIVATE sxi32 SyBlobAppend(SyBlob *pBlob,const void *pData,sxu32 nSize);
PH7_PRIVATE sxi32 SyBlobReadOnly(SyBlob *pBlob,const void *pData,sxu32 nByte);
PH7_PRIVATE sxi32 SyBlobInit(SyBlob *pBlob,SyMemBackend *pAllocator);
PH7_PRIVATE sxi32 SyBlobInitFromBuf(SyBlob *pBlob,void *pBuffer,sxu32 nSize);
PH7_PRIVATE char *SyMemBackendStrDup(SyMemBackend *pBackend,const char *zSrc,sxu32 nSize);
PH7_PRIVATE void *SyMemBackendDup(SyMemBackend *pBackend,const void *pSrc,sxu32 nSize);
PH7_PRIVATE sxi32 SyMemBackendRelease(SyMemBackend *pBackend);
PH7_PRIVATE sxi32 SyMemBackendInitFromOthers(SyMemBackend *pBackend,const SyMemMethods *pMethods,ProcMemError xMemErr,void *pUserData);
PH7_PRIVATE sxi32 SyMemBackendInit(SyMemBackend *pBackend,ProcMemError xMemErr,void *pUserData);
PH7_PRIVATE sxi32 SyMemBackendInitFromParent(SyMemBackend *pBackend,SyMemBackend *pParent);
#if 0
/* Not used in the current release of the PH7 engine */
PH7_PRIVATE void *SyMemBackendPoolRealloc(SyMemBackend *pBackend,void *pOld,sxu32 nByte);
#endif
PH7_PRIVATE sxi32 SyMemBackendPoolFree(SyMemBackend *pBackend,void *pChunk);
PH7_PRIVATE void *SyMemBackendPoolAlloc(SyMemBackend *pBackend,sxu32 nByte);
PH7_PRIVATE sxi32 SyMemBackendFree(SyMemBackend *pBackend,void *pChunk);
PH7_PRIVATE void *SyMemBackendRealloc(SyMemBackend *pBackend,void *pOld,sxu32 nByte);
PH7_PRIVATE void *SyMemBackendAlloc(SyMemBackend *pBackend,sxu32 nByte);
#if defined(PH7_ENABLE_THREADS)
PH7_PRIVATE sxi32 SyMemBackendMakeThreadSafe(SyMemBackend *pBackend,const SyMutexMethods *pMethods);
PH7_PRIVATE sxi32 SyMemBackendDisbaleMutexing(SyMemBackend *pBackend);
#endif
PH7_PRIVATE sxu32 SyMemcpy(const void *pSrc,void *pDest,sxu32 nLen);
PH7_PRIVATE sxi32 SyMemcmp(const void *pB1,const void *pB2,sxu32 nSize);
PH7_PRIVATE void SyZero(void *pSrc,sxu32 nSize);
PH7_PRIVATE sxi32 SyStrnicmp(const char *zLeft,const char *zRight,sxu32 SLen);
PH7_PRIVATE sxi32 SyStrnmicmp(const void *pLeft, const void *pRight,sxu32 SLen);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyStrncmp(const char *zLeft,const char *zRight,sxu32 nLen);
#endif
PH7_PRIVATE sxi32 SyByteListFind(const char *zSrc,sxu32 nLen,const char *zList,sxu32 *pFirstPos);
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyByteFind2(const char *zStr,sxu32 nLen,sxi32 c,sxu32 *pPos);
#endif
PH7_PRIVATE sxi32 SyByteFind(const char *zStr,sxu32 nLen,sxi32 c,sxu32 *pPos);
PH7_PRIVATE sxu32 SyStrlen(const char *zSrc);
#if defined(PH7_ENABLE_THREADS)
PH7_PRIVATE const SyMutexMethods *SyMutexExportMethods(void);
PH7_PRIVATE sxi32 SyMemBackendMakeThreadSafe(SyMemBackend *pBackend,const SyMutexMethods *pMethods);
PH7_PRIVATE sxi32 SyMemBackendDisbaleMutexing(SyMemBackend *pBackend);
#endif
#endif /* __PH7INT_H__ */
/*
 * ----------------------------------------------------------
 * File: vm.c
 * MD5: fed926a5df137d2896badd8911a0b752
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: vm.c v1.4 FreeBSD 2012-09-10 00:06 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/*
 * The code in this file implements execution method of the PH7 Virtual Machine.
 * The PH7 compiler (implemented in 'compiler.c' and 'parse.c') generates a bytecode program
 * which is then executed by the virtual machine implemented here to do the work of the PHP
 * statements.
 * PH7 bytecode programs are similar in form to assembly language. The program consists
 * of a linear sequence of operations .Each operation has an opcode and 3 operands.
 * Operands P1 and P2 are integers where the first is signed while the second is unsigned.
 * Operand P3 is an arbitrary pointer specific to each instruction. The P2 operand is usually
 * the jump destination used by the OP_JMP,OP_JZ,OP_JNZ,... instructions.
 * Opcodes will typically ignore one or more operands. Many opcodes ignore all three operands.
 * Computation results are stored on a stack. Each entry on the stack is of type ph7_value.
 * PH7 uses the ph7_value object to represent all values that can be stored in a PHP variable.
 * Since PHP uses dynamic typing for the values it stores. Values stored in ph7_value objects
 * can be integers,floating point values,strings,arrays,class instances (object in the PHP jargon)
 * and so on.
 * Internally,the PH7 virtual machine manipulates nearly all PHP values as ph7_values structures.
 * Each ph7_value may cache multiple representations(string,integer etc.) of the same value.
 * An implicit conversion from one type to the other occurs as necessary.
 * Most of the code in this file is taken up by the [VmByteCodeExec()] function which does
 * the work of interpreting a PH7 bytecode program. But other routines are also provided
 * to help in building up a program instruction by instruction. Also note that sepcial
 * functions that need access to the underlying virtual machine details such as [die()],
 * [func_get_args()],[call_user_func()],[ob_start()] and many more are implemented here.
 */
/*
 * Each active virtual machine frame is represented by an instance 
 * of the following structure.
 * VM Frame hold local variables and other stuff related to function call.
 */
struct VmFrame
{
	VmFrame *pParent; /* Parent frame or NULL if global scope */
	void *pUserData;  /* Upper layer private data associated with this frame */
	ph7_class_instance *pThis; /* Current class instance [i.e: the '$this' variable].NULL otherwise */
	SySet sLocal;     /* Local variables container (VmSlot instance) */
	ph7_vm *pVm;      /* VM that own this frame */
	SyHash hVar;      /* Variable hashtable for fast lookup */
	SySet sArg;       /* Function arguments container */
	SySet sRef;       /* Local reference table (VmSlot instance) */
	sxi32 iFlags;     /* Frame configuration flags (See below)*/
	sxu32 iExceptionJump; /* Exception jump destination */
};
#define VM_FRAME_EXCEPTION  0x01 /* Special Exception frame */
#define VM_FRAME_THROW      0x02 /* An exception was thrown */
#define VM_FRAME_CATCH      0x04 /* Catch frame */
/*
 * When a user defined variable is released (via manual unset($x) or garbage collected)
 * memory object index is stored in an instance of the following structure and put
 * in the free object table so that it can be reused again without allocating
 * a new memory object.
 */
typedef struct VmSlot VmSlot;
struct VmSlot
{
	sxu32 nIdx;      /* Index in pVm->aMemObj[] */ 
	void *pUserData; /* Upper-layer private data */
};
/*
 * An entry in the reference table is represented by an instance of the
 * follwoing table.
 * The implementation of the reference mechanism in the PH7 engine
 * differ greatly from the one used by the zend engine. That is,
 * the reference implementation is consistent,solid and it's
 * behavior resemble the C++ reference mechanism.
 * Refer to the official for more information on this powerful
 * extension.
 */
struct VmRefObj
{
	SySet aReference;  /* Table of references to this memory object */
	SySet aArrEntries; /* Foreign hashmap entries [i.e: array(&$a) ] */
	sxu32 nIdx;        /* Referenced object index */
	sxi32 iFlags;      /* Configuration flags */
	VmRefObj *pNextCollide,*pPrevCollide; /* Collision link */
	VmRefObj *pNext,*pPrev;               /* List of all referenced objects */
};
#define VM_REF_IDX_KEEP  0x001 /* Do not restore the memory object to the free list */
/*
 * Output control buffer entry.
 * Refer to the implementation of [ob_start()] for more information.
 */
typedef struct VmObEntry VmObEntry;
struct VmObEntry
{
	ph7_value sCallback; /* User defined callback */
	SyBlob sOB;          /* Output buffer consumer */
};
/*
 * Each installed shutdown callback (registered using [register_shutdown_function()] ) 
 * is stored in an instance of the following structure.
 * Refer to the implementation of [register_shutdown_function(()] for more information.
 */
typedef struct VmShutdownCB VmShutdownCB;
struct VmShutdownCB
{
	ph7_value sCallback; /* Shutdown callback */
	ph7_value aArg[10];   /* Callback arguments (10 maximum arguments) */
	int nArg;             /* Total number of given arguments */
};
/* Uncaught exception code value */
#define PH7_EXCEPTION -255
/*
 * Each parsed URI is recorded and stored in an instance of the following structure.
 * This structure and it's related routines are taken verbatim from the xHT project
 * [A modern embeddable HTTP engine implementing all the RFC2616 methods]
 * the xHT project is developed internally by Symisc Systems.
 */
typedef struct SyhttpUri SyhttpUri;
struct SyhttpUri 
{ 
	SyString sHost;     /* Hostname or IP address */ 
	SyString sPort;     /* Port number */ 
	SyString sPath;     /* Mandatory resource path passed verbatim (Not decoded) */ 
	SyString sQuery;    /* Query part */	 
	SyString sFragment; /* Fragment part */ 
	SyString sScheme;   /* Scheme */ 
	SyString sUser;     /* Username */ 
	SyString sPass;     /* Password */
	SyString sRaw;      /* Raw URI */
};
/* 
 * An instance of the following structure is used to record all MIME headers seen
 * during a HTTP interaction. 
 * This structure and it's related routines are taken verbatim from the xHT project
 * [A modern embeddable HTTP engine implementing all the RFC2616 methods]
 * the xHT project is developed internally by Symisc Systems.
 */  
typedef struct SyhttpHeader SyhttpHeader;
struct SyhttpHeader 
{ 
	SyString sName;    /* Header name [i.e:"Content-Type","Host","User-Agent"]. NOT NUL TERMINATED */ 
	SyString sValue;   /* Header values [i.e: "text/html"]. NOT NUL TERMINATED */ 
};
/*
 * Supported HTTP methods.
 */
#define HTTP_METHOD_GET  1 /* GET */
#define HTTP_METHOD_HEAD 2 /* HEAD */
#define HTTP_METHOD_POST 3 /* POST */
#define HTTP_METHOD_PUT  4 /* PUT */
#define HTTP_METHOD_OTHR 5 /* Other HTTP methods [i.e: DELETE,TRACE,OPTIONS...]*/
/*
 * Supported HTTP protocol version.
 */
#define HTTP_PROTO_10 1 /* HTTP/1.0 */
#define HTTP_PROTO_11 2 /* HTTP/1.1 */
/*
 * Register a constant and it's associated expansion callback so that
 * it can be expanded from the target PHP program.
 * The constant expansion mechanism under PH7 is extremely powerful yet
 * simple and work as follows:
 * Each registered constant have a C procedure associated with it.
 * This procedure known as the constant expansion callback is responsible
 * of expanding the invoked constant to the desired value,for example:
 * The C procedure associated with the "__PI__" constant expands to 3.14 (the value of PI).
 * The "__OS__" constant procedure expands to the name of the host Operating Systems
 * (Windows,Linux,...) and so on.
 * Please refer to the official documentation for additional information.
 */
PH7_PRIVATE sxi32 PH7_VmRegisterConstant(
	ph7_vm *pVm,            /* Target VM */
	const SyString *pName,  /* Constant name */
	ProcConstant xExpand,   /* Constant expansion callback */
	void *pUserData         /* Last argument to xExpand() */
	)
{
	ph7_constant *pCons;
	SyHashEntry *pEntry;
	char *zDupName;
	sxi32 rc;
	pEntry = SyHashGet(&pVm->hConstant,(const void *)pName->zString,pName->nByte);
	if( pEntry ){
		/* Overwrite the old definition and return immediately */
		pCons = (ph7_constant *)pEntry->pUserData;
		pCons->xExpand = xExpand;
		pCons->pUserData = pUserData;
		return SXRET_OK;
	}
	/* Allocate a new constant instance */
	pCons = (ph7_constant *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_constant));
	if( pCons == 0 ){
		return 0;
	}
	/* Duplicate constant name */
	zDupName = SyMemBackendStrDup(&pVm->sAllocator,pName->zString,pName->nByte);
	if( zDupName == 0 ){
		SyMemBackendPoolFree(&pVm->sAllocator,pCons);
		return 0;
	}
	/* Install the constant */
	SyStringInitFromBuf(&pCons->sName,zDupName,pName->nByte);
	pCons->xExpand = xExpand;
	pCons->pUserData = pUserData;
	rc = SyHashInsert(&pVm->hConstant,(const void *)zDupName,SyStringLength(&pCons->sName),pCons);
	if( rc != SXRET_OK ){
		SyMemBackendFree(&pVm->sAllocator,zDupName);
		SyMemBackendPoolFree(&pVm->sAllocator,pCons);
		return rc;
	}
	/* All done,constant can be invoked from PHP code */
	return SXRET_OK;
}
/*
 * Allocate a new foreign function instance.
 * This function return SXRET_OK on success. Any other
 * return value indicates failure.
 * Please refer to the official documentation for an introduction to
 * the foreign function mechanism.
 */
static sxi32 PH7_NewForeignFunction(
	ph7_vm *pVm,              /* Target VM */
	const SyString *pName,    /* Foreign function name */
	ProchHostFunction xFunc,  /* Foreign function implementation */
	void *pUserData,          /* Foreign function private data */
	ph7_user_func **ppOut     /* OUT: VM image of the foreign function */
	)
{
	ph7_user_func *pFunc;
	char *zDup;
	/* Allocate a new user function */
	pFunc = (ph7_user_func *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_user_func));
	if( pFunc == 0 ){
		return SXERR_MEM;
	}
	/* Duplicate function name */
	zDup = SyMemBackendStrDup(&pVm->sAllocator,pName->zString,pName->nByte);
	if( zDup == 0 ){
		SyMemBackendPoolFree(&pVm->sAllocator,pFunc);
		return SXERR_MEM;
	}
	/* Zero the structure */
	SyZero(pFunc,sizeof(ph7_user_func));
	/* Initialize structure fields */
	SyStringInitFromBuf(&pFunc->sName,zDup,pName->nByte);
	pFunc->pVm   = pVm;
	pFunc->xFunc = xFunc;
	pFunc->pUserData = pUserData;
	SySetInit(&pFunc->aAux,&pVm->sAllocator,sizeof(ph7_aux_data));
	/* Write a pointer to the new function */
	*ppOut = pFunc;
	return SXRET_OK;
}
/*
 * Install a foreign function and it's associated callback so that
 * it can be invoked from the target PHP code.
 * This function return SXRET_OK on successful registration. Any other
 * return value indicates failure.
 * Please refer to the official documentation for an introduction to
 * the foreign function mechanism.
 */
PH7_PRIVATE sxi32 PH7_VmInstallForeignFunction(
	ph7_vm *pVm,              /* Target VM */
	const SyString *pName,    /* Foreign function name */
	ProchHostFunction xFunc,  /* Foreign function implementation */
	void *pUserData           /* Foreign function private data */
	)
{
	ph7_user_func *pFunc;
	SyHashEntry *pEntry;
	sxi32 rc;
	/* Overwrite any previously registered function with the same name */
	pEntry = SyHashGet(&pVm->hHostFunction,pName->zString,pName->nByte);
	if( pEntry ){
		pFunc = (ph7_user_func *)pEntry->pUserData;
		pFunc->pUserData = pUserData;
		pFunc->xFunc = xFunc;
		SySetReset(&pFunc->aAux);
		return SXRET_OK;
	}
	/* Create a new user function */
	rc = PH7_NewForeignFunction(&(*pVm),&(*pName),xFunc,pUserData,&pFunc);
	if( rc != SXRET_OK ){
		return rc;
	}
	/* Install the function in the corresponding hashtable */
	rc = SyHashInsert(&pVm->hHostFunction,SyStringData(&pFunc->sName),pName->nByte,pFunc);
	if( rc != SXRET_OK ){
		SyMemBackendFree(&pVm->sAllocator,(void *)SyStringData(&pFunc->sName));
		SyMemBackendPoolFree(&pVm->sAllocator,pFunc);
		return rc;
	}
	/* User function successfully installed */
	return SXRET_OK;
}
/*
 * Initialize a VM function.
 */
PH7_PRIVATE sxi32 PH7_VmInitFuncState(
	ph7_vm *pVm,        /* Target VM */
	ph7_vm_func *pFunc, /* Target Fucntion */
	const char *zName,  /* Function name */
	sxu32 nByte,        /* zName length */
	sxi32 iFlags,       /* Configuration flags */
	void *pUserData     /* Function private data */
	)
{
	/* Zero the structure */
	SyZero(pFunc,sizeof(ph7_vm_func));	
	/* Initialize structure fields */
	/* Arguments container */
	SySetInit(&pFunc->aArgs,&pVm->sAllocator,sizeof(ph7_vm_func_arg));
	/* Static variable container */
	SySetInit(&pFunc->aStatic,&pVm->sAllocator,sizeof(ph7_vm_func_static_var));
	/* Bytecode container */
	SySetInit(&pFunc->aByteCode,&pVm->sAllocator,sizeof(VmInstr));
    /* Preallocate some instruction slots */
	SySetAlloc(&pFunc->aByteCode,0x10);
	/* Closure environment */
	SySetInit(&pFunc->aClosureEnv,&pVm->sAllocator,sizeof(ph7_vm_func_closure_env));
	pFunc->iFlags = iFlags;
	pFunc->pUserData = pUserData;
	SyStringInitFromBuf(&pFunc->sName,zName,nByte);
	return SXRET_OK;
}
/*
 * Install a user defined function in the corresponding VM container.
 */
PH7_PRIVATE sxi32 PH7_VmInstallUserFunction(
	ph7_vm *pVm,        /* Target VM */
	ph7_vm_func *pFunc, /* Target function */
	SyString *pName     /* Function name */
	)
{
	SyHashEntry *pEntry;
	sxi32 rc;
	if( pName == 0 ){
		/* Use the built-in name */
		pName = &pFunc->sName;
	}
	/* Check for duplicates (functions with the same name) first */
	pEntry = SyHashGet(&pVm->hFunction,pName->zString,pName->nByte);
	if( pEntry ){
		ph7_vm_func *pLink = (ph7_vm_func *)pEntry->pUserData;
		if( pLink != pFunc ){
			/* Link */
			pFunc->pNextName = pLink;
			pEntry->pUserData = pFunc;
		}
		return SXRET_OK;
	}
	/* First time seen */
	pFunc->pNextName = 0;
	rc = SyHashInsert(&pVm->hFunction,pName->zString,pName->nByte,pFunc);
	return rc;
}
/*
 * Install a user defined class in the corresponding VM container.
 */
PH7_PRIVATE sxi32 PH7_VmInstallClass(
	ph7_vm *pVm,      /* Target VM  */
	ph7_class *pClass /* Target Class */
	)
{
	SyString *pName = &pClass->sName;
	SyHashEntry *pEntry;
	sxi32 rc;
	/* Check for duplicates */
	pEntry = SyHashGet(&pVm->hClass,(const void *)pName->zString,pName->nByte);
	if( pEntry ){
		ph7_class *pLink = (ph7_class *)pEntry->pUserData;
		/* Link entry with the same name */
		pClass->pNextName = pLink;
		pEntry->pUserData = pClass;
		return SXRET_OK;
	}
	pClass->pNextName = 0;
	/* Perform a simple hashtable insertion */
	rc = SyHashInsert(&pVm->hClass,(const void *)pName->zString,pName->nByte,pClass);
	return rc;
}
/*
 * Instruction builder interface.
 */
PH7_PRIVATE sxi32 PH7_VmEmitInstr(
	ph7_vm *pVm,  /* Target VM */
	sxi32 iOp,    /* Operation to perform */
	sxi32 iP1,    /* First operand */
	sxu32 iP2,    /* Second operand */
	void *p3,     /* Third operand */
	sxu32 *pIndex /* Instruction index. NULL otherwise */
	)
{
	VmInstr sInstr;
	sxi32 rc;
	/* Fill the VM instruction */
	sInstr.iOp = (sxu8)iOp; 
	sInstr.iP1 = iP1; 
	sInstr.iP2 = iP2; 
	sInstr.p3  = p3;  
	if( pIndex ){
		/* Instruction index in the bytecode array */
		*pIndex = SySetUsed(pVm->pByteContainer);
	}
	/* Finally,record the instruction */
	rc = SySetPut(pVm->pByteContainer,(const void *)&sInstr);
	if( rc != SXRET_OK ){
		PH7_GenCompileError(&pVm->sCodeGen,E_ERROR,1,"Fatal,Cannot emit instruction due to a memory failure");
		/* Fall throw */
	}
	return rc;
}
/*
 * Swap the current bytecode container with the given one.
 */
PH7_PRIVATE sxi32 PH7_VmSetByteCodeContainer(ph7_vm *pVm,SySet *pContainer)
{
	if( pContainer == 0 ){
		/* Point to the default container */
		pVm->pByteContainer = &pVm->aByteCode;
	}else{
		/* Change container */
		pVm->pByteContainer = &(*pContainer);
	}
	return SXRET_OK;
}
/*
 * Return the current bytecode container.
 */
PH7_PRIVATE SySet * PH7_VmGetByteCodeContainer(ph7_vm *pVm)
{
	return pVm->pByteContainer;
}
/*
 * Extract the VM instruction rooted at nIndex.
 */
PH7_PRIVATE VmInstr * PH7_VmGetInstr(ph7_vm *pVm,sxu32 nIndex)
{
	VmInstr *pInstr;
	pInstr = (VmInstr *)SySetAt(pVm->pByteContainer,nIndex);
	return pInstr;
}
/*
 * Return the total number of VM instructions recorded so far.
 */
PH7_PRIVATE sxu32 PH7_VmInstrLength(ph7_vm *pVm)
{
	return SySetUsed(pVm->pByteContainer);
}
/*
 * Pop the last VM instruction.
 */
PH7_PRIVATE VmInstr * PH7_VmPopInstr(ph7_vm *pVm)
{
	return (VmInstr *)SySetPop(pVm->pByteContainer);
}
/*
 * Peek the last VM instruction.
 */
PH7_PRIVATE VmInstr * PH7_VmPeekInstr(ph7_vm *pVm)
{
	return (VmInstr *)SySetPeek(pVm->pByteContainer);
}
PH7_PRIVATE VmInstr * PH7_VmPeekNextInstr(ph7_vm *pVm)
{
	VmInstr *aInstr;
	sxu32 n;
	n = SySetUsed(pVm->pByteContainer);
	if( n < 2 ){
		return 0;
	}
	aInstr = (VmInstr *)SySetBasePtr(pVm->pByteContainer);
	return &aInstr[n - 2];
}
/*
 * Allocate a new virtual machine frame.
 */
static VmFrame * VmNewFrame(
	ph7_vm *pVm,              /* Target VM */
	void *pUserData,          /* Upper-layer private data */
	ph7_class_instance *pThis /* Top most class instance [i.e: Object in the PHP jargon]. NULL otherwise */
	)
{
	VmFrame *pFrame;
	/* Allocate a new vm frame */
	pFrame = (VmFrame *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(VmFrame));
	if( pFrame == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pFrame,sizeof(VmFrame));
	/* Initialize frame fields */
	pFrame->pUserData = pUserData;
	pFrame->pThis = pThis;
	pFrame->pVm = pVm;
	SyHashInit(&pFrame->hVar,&pVm->sAllocator,0,0);
	SySetInit(&pFrame->sArg,&pVm->sAllocator,sizeof(VmSlot));
	SySetInit(&pFrame->sLocal,&pVm->sAllocator,sizeof(VmSlot));
	SySetInit(&pFrame->sRef,&pVm->sAllocator,sizeof(VmSlot));
	return pFrame;
}
/*
 * Enter a VM frame.
 */
static sxi32 VmEnterFrame(
	ph7_vm *pVm,               /* Target VM */
	void *pUserData,           /* Upper-layer private data */
	ph7_class_instance *pThis, /* Top most class instance [i.e: Object in the PHP jargon]. NULL otherwise */
	VmFrame **ppFrame          /* OUT: Top most active frame */
	)
{
	VmFrame *pFrame;
	/* Allocate a new frame */
	pFrame = VmNewFrame(&(*pVm),pUserData,pThis);
	if( pFrame == 0 ){
		return SXERR_MEM;
	}
	/* Link to the list of active VM frame */
	pFrame->pParent = pVm->pFrame;
	pVm->pFrame = pFrame;
	if( ppFrame ){
		/* Write a pointer to the new VM frame */
		*ppFrame = pFrame;
	}
	return SXRET_OK;
}
/*
 * Link a foreign variable with the TOP most active frame.
 * Refer to the PH7_OP_UPLINK instruction implementation for more
 * information.
 */
static sxi32 VmFrameLink(ph7_vm *pVm,SyString *pName)
{
	VmFrame *pTarget,*pFrame;
	SyHashEntry *pEntry = 0;
	sxi32 rc;
	/* Point to the upper frame */
	pFrame = pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	pTarget = pFrame;
	pFrame = pTarget->pParent;
	while( pFrame ){
		if( (pFrame->iFlags & VM_FRAME_EXCEPTION) == 0 ){
			/* Query the current frame */
			pEntry = SyHashGet(&pFrame->hVar,(const void *)pName->zString,pName->nByte);	
			if( pEntry ){
				/* Variable found */
				break;
			}
		}
		/* Point to the upper frame */
		pFrame = pFrame->pParent;
	}
	if( pEntry == 0 ){
		/* Inexistant variable */
		return SXERR_NOTFOUND;
	}
	/* Link to the current frame */
	rc = SyHashInsert(&pTarget->hVar,pEntry->pKey,pEntry->nKeyLen,pEntry->pUserData);
	if( rc == SXRET_OK ){
		sxu32 nIdx;
		nIdx = SX_PTR_TO_INT(pEntry->pUserData);
		PH7_VmRefObjInstall(&(*pVm),nIdx,SyHashLastEntry(&pTarget->hVar),0,0);
	}
	return rc;
}
/*
 * Leave the top-most active frame.
 */
static void VmLeaveFrame(ph7_vm *pVm)
{
	VmFrame *pFrame = pVm->pFrame;
	if( pFrame ){
		/* Unlink from the list of active VM frame */
		pVm->pFrame = pFrame->pParent;
		if( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) == 0 ){
			VmSlot  *aSlot;
			sxu32 n;
			/* Restore local variable to the free pool so that they can be reused again */
			aSlot = (VmSlot *)SySetBasePtr(&pFrame->sLocal);
			for(n = 0 ; n < SySetUsed(&pFrame->sLocal) ; ++n ){
				/* Unset the local variable */
				PH7_VmUnsetMemObj(&(*pVm),aSlot[n].nIdx,FALSE);
			}
			/* Remove local reference */
			aSlot = (VmSlot *)SySetBasePtr(&pFrame->sRef);
			for(n = 0 ; n < SySetUsed(&pFrame->sRef) ; ++n ){
				PH7_VmRefObjRemove(&(*pVm),aSlot[n].nIdx,(SyHashEntry *)aSlot[n].pUserData,0);
			}
		}
		/* Release internal containers */
		SyHashRelease(&pFrame->hVar);
		SySetRelease(&pFrame->sArg);
		SySetRelease(&pFrame->sLocal);
		SySetRelease(&pFrame->sRef);
		/* Release the whole structure */
		SyMemBackendPoolFree(&pVm->sAllocator,pFrame);
	}
}
/*
 * Compare two functions signature and return the comparison result.
 */
static int VmOverloadCompare(SyString *pFirst,SyString *pSecond)
{
	const char *zSend = &pSecond->zString[pSecond->nByte];
	const char *zFend = &pFirst->zString[pFirst->nByte];
	const char *zSin = pSecond->zString;
	const char *zFin = pFirst->zString;
	const char *zPtr = zFin;
	for(;;){
		if( zFin >= zFend || zSin >= zSend ){
			break;
		}
		if( zFin[0] != zSin[0] ){
			/* mismatch */
			break;
		}
		zFin++;
		zSin++;
	}
	return (int)(zFin-zPtr);
}
/*
 * Select the appropriate VM function for the current call context.
 * This is the implementation of the powerful 'function overloading' feature
 * introduced by the version 2 of the PH7 engine.
 * Refer to the official documentation for more information.
 */
static ph7_vm_func * VmOverload(
	ph7_vm *pVm,         /* Target VM */
	ph7_vm_func *pList,  /* Linked list of candidates for overloading */
	ph7_value *aArg,     /* Array of passed arguments */
	int nArg             /* Total number of passed arguments  */
	)
{
	int iTarget,i,j,iCur,iMax;
	ph7_vm_func *apSet[10];   /* Maximum number of candidates */
	ph7_vm_func *pLink;
	SyString sArgSig;
	SyBlob sSig;

	pLink = pList;
	i = 0;
	/* Put functions expecting the same number of passed arguments */
	while( i < (int)SX_ARRAYSIZE(apSet) ){
		if( pLink == 0 ){
			break;
		}
		if( (int)SySetUsed(&pLink->aArgs) == nArg ){
			/* Candidate for overloading */
			apSet[i++] = pLink;
		}
		/* Point to the next entry */
		pLink = pLink->pNextName;
	}
	if( i < 1 ){
		/* No candidates,return the head of the list */
		return pList;
	}
	if( nArg < 1 || i < 2 ){
		/* Return the only candidate */
		return apSet[0];
	}
	/* Calculate function signature */
	SyBlobInit(&sSig,&pVm->sAllocator);
	for( j = 0 ; j < nArg ; j++ ){
		int c = 'n'; /* null */
		if( aArg[j].iFlags & MEMOBJ_HASHMAP ){
			/* Hashmap */
			c = 'h';
		}else if( aArg[j].iFlags & MEMOBJ_BOOL ){
			/* bool */
			c = 'b';
		}else if( aArg[j].iFlags & MEMOBJ_INT ){
			/* int */
			c = 'i';
		}else if( aArg[j].iFlags & MEMOBJ_STRING ){
			/* String */
			c = 's';
		}else if( aArg[j].iFlags & MEMOBJ_REAL ){
			/* Float */
			c = 'f';
		}else if( aArg[j].iFlags & MEMOBJ_OBJ ){
			/* Class instance */
			ph7_class *pClass = ((ph7_class_instance *)aArg[j].x.pOther)->pClass;
			SyString *pName = &pClass->sName;
			SyBlobAppend(&sSig,(const void *)pName->zString,pName->nByte);
			c = -1;
		}
		if( c > 0 ){
			SyBlobAppend(&sSig,(const void *)&c,sizeof(char));
		}
	}
	SyStringInitFromBuf(&sArgSig,SyBlobData(&sSig),SyBlobLength(&sSig));
	iTarget = 0;
	iMax = -1;
	/* Select the appropriate function */
	for( j = 0 ; j < i ; j++ ){
		/* Compare the two signatures */
		iCur = VmOverloadCompare(&sArgSig,&apSet[j]->sSignature);
		if( iCur > iMax ){
			iMax = iCur;
			iTarget = j;
		}
	}
	SyBlobRelease(&sSig);
	/* Appropriate function for the current call context */
	return apSet[iTarget];
}
/* Forward declaration */
static sxi32 VmLocalExec(ph7_vm *pVm,SySet *pByteCode,ph7_value *pResult);
static sxi32 VmErrorFormat(ph7_vm *pVm,sxi32 iErr,const char *zFormat,...);
/*
 * Mount a compiled class into the freshly created vitual machine so that
 * it can be instanciated from the executed PHP script.
 */
static sxi32 VmMountUserClass(
	ph7_vm *pVm,      /* Target VM */
	ph7_class *pClass /* Class to be mounted */
	)
{
	ph7_class_method *pMeth;
	ph7_class_attr *pAttr;
	SyHashEntry *pEntry;
	sxi32 rc;
	/* Reset the loop cursor */
	SyHashResetLoopCursor(&pClass->hAttr);
	/* Process only static and constant attribute */
	while( (pEntry = SyHashGetNextEntry(&pClass->hAttr)) != 0 ){
		/* Extract the current attribute */
		pAttr = (ph7_class_attr *)pEntry->pUserData;
		if( pAttr->iFlags & (PH7_CLASS_ATTR_CONSTANT|PH7_CLASS_ATTR_STATIC) ){
			ph7_value *pMemObj;
			/* Reserve a memory object for this constant/static attribute */
			pMemObj = PH7_ReserveMemObj(&(*pVm));
			if( pMemObj == 0 ){
				VmErrorFormat(&(*pVm),PH7_CTX_ERR,
					"Cannot reserve a memory object for class attribute '%z->%z' due to a memory failure",
					&pClass->sName,&pAttr->sName
					);
				return SXERR_MEM;
			}
			if( SySetUsed(&pAttr->aByteCode) > 0 ){
				/* Initialize attribute default value (any complex expression) */ 
				VmLocalExec(&(*pVm),&pAttr->aByteCode,pMemObj);
			}
			/* Record attribute index */
			pAttr->nIdx = pMemObj->nIdx;
			/* Install static attribute in the reference table */
			PH7_VmRefObjInstall(&(*pVm),pMemObj->nIdx,0,0,VM_REF_IDX_KEEP);
		}
	}
	/* Install class methods */
	if( pClass->iFlags & PH7_CLASS_INTERFACE ){
		/* Do not mount interface methods since they are signatures only.
		 */
		return SXRET_OK;
	}
	/* Create constructor alias if not yet done */
	if( SyHashGet(&pClass->hMethod,"__construct",sizeof("__construct")-1) == 0 ){
		/* User constructor with the same base class name */
		pEntry = SyHashGet(&pClass->hMethod,SyStringData(&pClass->sName),SyStringLength(&pClass->sName));
		if( pEntry ){
			pMeth = (ph7_class_method *)pEntry->pUserData;
			/* Create the alias */
			SyHashInsert(&pClass->hMethod,"__construct",sizeof("__construct")-1,pMeth);
		}
	}
	/* Install the methods now */
	SyHashResetLoopCursor(&pClass->hMethod);
	while((pEntry = SyHashGetNextEntry(&pClass->hMethod)) != 0 ){
		pMeth = (ph7_class_method *)pEntry->pUserData;
		if( (pMeth->iFlags & PH7_CLASS_ATTR_ABSTRACT) == 0 ){
			rc = PH7_VmInstallUserFunction(&(*pVm),&pMeth->sFunc,&pMeth->sVmName);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
	}
	return SXRET_OK;
}
/*
 * Allocate a private frame for attributes of the given
 * class instance (Object in the PHP jargon).
 */
PH7_PRIVATE sxi32 PH7_VmCreateClassInstanceFrame(
	ph7_vm *pVm, /* Target VM */
	ph7_class_instance *pObj /* Class instance */
	)
{
	ph7_class *pClass = pObj->pClass;
	ph7_class_attr *pAttr;
	SyHashEntry *pEntry;
	sxi32 rc;
	/* Install class attribute in the private frame associated with this instance */
	SyHashResetLoopCursor(&pClass->hAttr);
	while( (pEntry = SyHashGetNextEntry(&pClass->hAttr)) != 0 ){
		VmClassAttr *pVmAttr;
		/* Extract the current attribute */
		pAttr = (ph7_class_attr *)pEntry->pUserData;
		pVmAttr = (VmClassAttr *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(VmClassAttr));
		if( pVmAttr == 0 ){
			return SXERR_MEM;
		}
		pVmAttr->pAttr = pAttr;
		if( (pAttr->iFlags & (PH7_CLASS_ATTR_CONSTANT|PH7_CLASS_ATTR_STATIC)) == 0 ){
			ph7_value *pMemObj;
			/* Reserve a memory object for this attribute */
			pMemObj = PH7_ReserveMemObj(&(*pVm));
			if( pMemObj == 0 ){
				SyMemBackendPoolFree(&pVm->sAllocator,pVmAttr);
				return SXERR_MEM;
			}
			pVmAttr->nIdx = pMemObj->nIdx;
			if( SySetUsed(&pAttr->aByteCode) > 0 ){
				/* Initialize attribute default value (any complex expression) */ 
				VmLocalExec(&(*pVm),&pAttr->aByteCode,pMemObj);
			}
			rc = SyHashInsert(&pObj->hAttr,SyStringData(&pAttr->sName),SyStringLength(&pAttr->sName),pVmAttr);
			if( rc != SXRET_OK ){
				VmSlot sSlot;
				/* Restore memory object */
				sSlot.nIdx = pMemObj->nIdx;
				sSlot.pUserData = 0;
				SySetPut(&pVm->aFreeObj,(const void *)&sSlot);
				SyMemBackendPoolFree(&pVm->sAllocator,pVmAttr);
				return SXERR_MEM;
			}
			/* Install attribute in the reference table */
			PH7_VmRefObjInstall(&(*pVm),pMemObj->nIdx,0,0,VM_REF_IDX_KEEP);
		}else{
			/* Install static/constant attribute */
			pVmAttr->nIdx = pAttr->nIdx;
			rc = SyHashInsert(&pObj->hAttr,SyStringData(&pAttr->sName),SyStringLength(&pAttr->sName),pVmAttr);
			if( rc != SXRET_OK ){
				SyMemBackendPoolFree(&pVm->sAllocator,pVmAttr);
				return SXERR_MEM;
			}
		}
	}
	return SXRET_OK;
}
/* Forward declaration */
static VmRefObj * VmRefObjExtract(ph7_vm *pVm,sxu32 nObjIdx);
static sxi32 VmRefObjUnlink(ph7_vm *pVm,VmRefObj *pRef);
/* 
 * Dummy read-only buffer used for slot reservation.
 */
static const char zDummy[sizeof(ph7_value)] = { 0 }; /* Must be >= sizeof(ph7_value) */ 
/*
 * Reserve a constant memory object.
 * Return a pointer to the raw ph7_value on success. NULL on failure.
 */
PH7_PRIVATE ph7_value * PH7_ReserveConstObj(ph7_vm *pVm,sxu32 *pIndex)
{
	ph7_value *pObj;
	sxi32 rc;
	if( pIndex ){
		/* Object index in the object table */
		*pIndex = SySetUsed(&pVm->aLitObj);
	}
	/* Reserve a slot for the new object */
	rc = SySetPut(&pVm->aLitObj,(const void *)zDummy);
	if( rc != SXRET_OK ){
		/* If the supplied memory subsystem is so sick that we are unable to allocate
		 * a tiny chunk of memory, there is no much we can do here.
		 */
		return 0;
	}
	pObj = (ph7_value *)SySetPeek(&pVm->aLitObj);
	return pObj;
}
/*
 * Reserve a memory object.
 * Return a pointer to the raw ph7_value on success. NULL on failure.
 */
PH7_PRIVATE ph7_value * VmReserveMemObj(ph7_vm *pVm,sxu32 *pIndex)
{
	ph7_value *pObj;
	sxi32 rc;
	if( pIndex ){
		/* Object index in the object table */
		*pIndex = SySetUsed(&pVm->aMemObj);
	}
	/* Reserve a slot for the new object */
	rc = SySetPut(&pVm->aMemObj,(const void *)zDummy);
	if( rc != SXRET_OK ){
		/* If the supplied memory subsystem is so sick that we are unable to allocate
		 * a tiny chunk of memory, there is no much we can do here.
		 */
		return 0;
	}
	pObj = (ph7_value *)SySetPeek(&pVm->aMemObj);
	return pObj;
}
/* Forward declaration */
static sxi32 VmEvalChunk(ph7_vm *pVm,ph7_context *pCtx,SyString *pChunk,int iFlags,int bTrueReturn);
/*
 * Built-in classes/interfaces and some functions that cannot be implemented
 * directly as foreign functions.
 */
#define PH7_BUILTIN_LIB \
	"class Exception { "\
    "protected $message = 'Unknown exception';"\
    "protected $code = 0;"\
    "protected $file;"\
    "protected $line;"\
    "protected $trace;"\
    "protected $previous;"\
	"public function __construct($message = null, $code = 0, Exception $previous = null){"\
	"   if( isset($message) ){"\
	"	  $this->message = $message;"\
	"   }"\
	"   $this->code = $code;"\
	"   $this->file = __FILE__;"\
	"   $this->line = __LINE__;"\
	"   $this->trace = debug_backtrace();"\
	"   if( isset($previous) ){"\
	"     $this->previous = $previous;"\
	"   }"\
	"}"\
	"public function getMessage(){"\
	"   return $this->message;"\
	"}"\
	" public function getCode(){"\
	"  return $this->code;"\
	"}"\
	"public function getFile(){"\
	"  return $this->file;"\
	"}"\
	"public function getLine(){"\
	"  return $this->line;"\
	"}"\
	"public function getTrace(){"\
	"   return $this->trace;"\
	"}"\
	"public function getTraceAsString(){"\
	"  return debug_string_backtrace();"\
	"}"\
	"public function getPrevious(){"\
	"    return $this->previous;"\
	"}"\
	"public function __toString(){"\
	"   return $this->file.' '.$this->line.' '.$this->code.' '.$this->message;"\
    "}"\
	"}"\
	"class ErrorException extends Exception { "\
	"protected $severity;"\
	"public function __construct(string $message = null,"\
	"int $code = 0,int $severity = 1,string $filename = __FILE__ ,int $lineno = __LINE__ ,Exception $previous = null){"\
	"   if( isset($message) ){"\
	"	  $this->message = $message;"\
	"   }"\
	"   $this->severity = $severity;"\
	"   $this->code = $code;"\
	"   $this->file = $filename;"\
	"   $this->line = $lineno;"\
	"   $this->trace = debug_backtrace();"\
	"   if( isset($previous) ){"\
	"     $this->previous = $previous;"\
	"   }"\
	"}"\
	"public function getSeverity(){"\
	"   return $this->severity;"\
    "}"\
	"}"\
	"interface Iterator {"\
	"public function current();"\
	"public function key();"\
	"public function next();"\
	"public function rewind();"\
	"public function valid();"\
	"}"\
	"interface IteratorAggregate {"\
	"public function getIterator();"\
	"}"\
	"interface Serializable {"\
	"public function serialize();"\
	"public function unserialize(string $serialized);"\
	"}"\
	"/* Directory releated IO */"\
	"class Directory {"\
	"public $handle = null;"\
	"public $path  = null;"\
	"public function __construct(string $path)"\
	"{"\
	"   $this->handle = opendir($path);"\
	"   if( $this->handle !== FALSE ){"\
	"      $this->path = $path;"\
	"   }"\
	"}"\
	"public function __destruct()"\
	"{"\
	"  if( $this->handle != null ){"\
	"       closedir($this->handle);"\
	"  }"\
	"}"\
	"public function read()"\
	"{"\
	"    return readdir($this->handle);"\
	"}"\
	"public function rewind()"\
	"{"\
	"    rewinddir($this->handle);"\
	"}"\
	"public function close()"\
	"{"\
	"    closedir($this->handle);"\
	"    $this->handle = null;"\
	"}"\
	"}"\
	"class stdClass{"\
	"  public $value;"\
	" /* Magic methods */"\
	" public function __toInt(){ return (int)$this->value; }"\
	" public function __toBool(){ return (bool)$this->value; }"\
	" public function __toFloat(){ return (float)$this->value; }"\
	" public function __toString(){ return (string)$this->value; }"\
	" function __construct($v){ $this->value = $v; }"\
	"}"\
	"function dir(string $path){"\
	"   return new Directory($path);"\
	"}"\
	"function Dir(string $path){"\
	"   return new Directory($path);"\
	"}"\
	"function scandir(string $directory,int $sort_order = SCANDIR_SORT_ASCENDING)"\
    "{"\
	"  if( func_num_args() < 1 ){ return FALSE; }"\
	"  $aDir = array();"\
	"  $pHandle = opendir($directory);"\
	"  if( $pHandle == FALSE ){ return FALSE; }"\
	"  while(FALSE !== ($pEntry = readdir($pHandle)) ){"\
	"      $aDir[] = $pEntry;"\
	"   }"\
	"  closedir($pHandle);"\
	"  if( $sort_order == SCANDIR_SORT_DESCENDING ){"\
	"      rsort($aDir);"\
	"  }else if( $sort_order == SCANDIR_SORT_ASCENDING ){"\
	"      sort($aDir);"\
	"  }"\
	"  return $aDir;"\
	"}"\
	"function glob(string $pattern,int $iFlags = 0){"\
	"/* Open the target directory */"\
	"$zDir = dirname($pattern);"\
	"if(!is_string($zDir) ){ $zDir = './'; }"\
	"$pHandle = opendir($zDir);"\
	"if( $pHandle == FALSE ){"\
	"   /* IO error while opening the current directory,return FALSE */"\
	"	return FALSE;"\
	"}"\
	"$pattern = basename($pattern);"\
	"$pArray = array(); /* Empty array */"\
	"/* Loop throw available entries */"\
	"while( FALSE !== ($pEntry = readdir($pHandle)) ){"\
	" /* Use the built-in strglob function which is a Symisc eXtension for wildcard comparison*/"\
	"	$rc = strglob($pattern,$pEntry);"\
	"	if( $rc ){"\
	"	   if( is_dir($pEntry) ){"\
	"	      if( $iFlags & GLOB_MARK ){"\
	"		     /* Adds a slash to each directory returned */"\
	"			 $pEntry .= DIRECTORY_SEPARATOR;"\
	"		  }"\
	"	   }else if( $iFlags & GLOB_ONLYDIR ){"\
	"	     /* Not a directory,ignore */"\
	"		 continue;"\
	"	   }"\
	"	   /* Add the entry */"\
	"	   $pArray[] = $pEntry;"\
	"	}"\
	" }"\
	"/* Close the handle */"\
	"closedir($pHandle);"\
	"if( ($iFlags & GLOB_NOSORT) == 0 ){"\
	"  /* Sort the array */"\
	"  sort($pArray);"\
	"}"\
	"if( ($iFlags & GLOB_NOCHECK) && sizeof($pArray) < 1 ){"\
	"  /* Return the search pattern if no files matching were found */"\
	"  $pArray[] = $pattern;"\
	"}"\
	"/* Return the created array */"\
	"return $pArray;"\
   "}"\
   "/* Creates a temporary file */"\
   "function tmpfile(){"\
   "  /* Extract the temp directory */"\
   "  $zTempDir = sys_get_temp_dir();"\
   "  if( strlen($zTempDir) < 1 ){"\
   "    /* Use the current dir */"\
   "    $zTempDir = '.';"\
   "  }"\
   "  /* Create the file */"\
   "  $pHandle = fopen($zTempDir.DIRECTORY_SEPARATOR.'PH7'.rand_str(12),'w+');"\
   "  return $pHandle;"\
   "}"\
   "/* Creates a temporary filename */"\
   "function tempnam(string $zDir = sys_get_temp_dir() /* Symisc eXtension */,string $zPrefix = 'PH7')"\
   "{"\
   "   return $zDir.DIRECTORY_SEPARATOR.$zPrefix.rand_str(12);"\
   "}"\
   "function array_unshift(&$pArray ){"\
   " if( func_num_args() < 1 || !is_array($pArray) ){  return 0; }"\
   "/* Copy arguments */"\
   "$nArgs = func_num_args();"\
   "$pNew = array();"\
   "for( $i = 1 ; $i < $nArgs ; ++$i ){"\
    " $pNew[] = func_get_arg($i);"\
    "}"\
   	"/* Make a copy of the old entries */"\
	"$pOld = array_copy($pArray);"\
	"/* Erase */"\
	"array_erase($pArray);"\
	"/* Unshift */"\
	"$pArray = array_merge($pNew,$pOld);"\
	"return sizeof($pArray);"\
    "}"\
	"function array_merge_recursive($array1, $array2){"\
	"if( func_num_args() < 1 ){ return NULL; }"\
    "$arrays = func_get_args();"\
    "$narrays = count($arrays);"\
    "$ret = $arrays[0];"\
    "for ($i = 1; $i < $narrays; $i++) {"\
	 " if( array_same($ret,$arrays[$i]) ){ /* Same instance */continue;}"\
     " foreach ($arrays[$i] as $key => $value) {"\
     "  if (((string) $key) === ((string) intval($key))) {"\
     "   $ret[] = $value;"\
     "  }else{"\
     "  if (is_array($value) && isset($ret[$key]) ) {"\
     "   $ret[$key] = array_merge_recursive($ret[$key], $value);"\
     " }else {"\
     "   $ret[$key] = $value;"\
     "  }"\
     " }"\
     " }"\
	 "}"\
	 " return $ret;"\
    "}"\
	"function max(){"\
    "  $pArgs = func_get_args();"\
    " if( sizeof($pArgs) < 1 ){"\
	"  return null;"\
    " }"\
    " if( sizeof($pArgs) < 2 ){"\
    " $pArg = $pArgs[0];"\
	" if( !is_array($pArg) ){"\
	"   return $pArg; "\
	" }"\
	" if( sizeof($pArg) < 1 ){"\
	"   return null;"\
	" }"\
	" $pArg = array_copy($pArgs[0]);"\
	" reset($pArg);"\
	" $max = current($pArg);"\
	" while( FALSE !== ($val = next($pArg)) ){"\
	"   if( $val > $max ){"\
	"     $max = $val;"\
    " }"\
	" }"\
	" return $max;"\
    " }"\
    " $max = $pArgs[0];"\
    " for( $i = 1; $i < sizeof($pArgs) ; ++$i ){"\
    " $val = $pArgs[$i];"\
	"if( $val > $max ){"\
	" $max = $val;"\
	"}"\
    " }"\
	" return $max;"\
    "}"\
	"function min(){"\
    "  $pArgs = func_get_args();"\
    " if( sizeof($pArgs) < 1 ){"\
	"  return null;"\
    " }"\
    " if( sizeof($pArgs) < 2 ){"\
    " $pArg = $pArgs[0];"\
	" if( !is_array($pArg) ){"\
	"   return $pArg; "\
	" }"\
	" if( sizeof($pArg) < 1 ){"\
	"   return null;"\
	" }"\
	" $pArg = array_copy($pArgs[0]);"\
	" reset($pArg);"\
	" $min = current($pArg);"\
	" while( FALSE !== ($val = next($pArg)) ){"\
	"   if( $val < $min ){"\
	"     $min = $val;"\
    " }"\
	" }"\
	" return $min;"\
    " }"\
    " $min = $pArgs[0];"\
    " for( $i = 1; $i < sizeof($pArgs) ; ++$i ){"\
    " $val = $pArgs[$i];"\
	"if( $val < $min ){"\
	" $min = $val;"\
	" }"\
    " }"\
	" return $min;"\
	"}"\
	"function fileowner(string $file){"\
    " $a = stat($file);"\
	" if( !is_array($a) ){"\
	"	return false;"\
	" }"\
	" return $a['uid'];"\
    "}"\
    "function filegroup(string $file){"\
	" $a = stat($file);"\
	" if( !is_array($a) ){"\
	"	return false;"\
	" }"\
	" return $a['gid'];"\
    "}"\
	 "function fileinode(string $file){"\
	" $a = stat($file);"\
	" if( !is_array($a) ){"\
	"	return false;"\
	" }"\
	" return $a['ino'];"\
    "}"

/*
 * Initialize a freshly allocated PH7 Virtual Machine so that we can
 * start compiling the target PHP program.
 */
PH7_PRIVATE sxi32 PH7_VmInit(
	 ph7_vm *pVm, /* Initialize this */
	 ph7 *pEngine /* Master engine */
	 )
{
	SyString sBuiltin;
	ph7_value *pObj;
	sxi32 rc;
	/* Zero the structure */
	SyZero(pVm,sizeof(ph7_vm));
	/* Initialize VM fields */
	pVm->pEngine = &(*pEngine);
	SyMemBackendInitFromParent(&pVm->sAllocator,&pEngine->sAllocator);
	/* Instructions containers */
	SySetInit(&pVm->aByteCode,&pVm->sAllocator,sizeof(VmInstr));
	SySetAlloc(&pVm->aByteCode,0xFF);
	pVm->pByteContainer = &pVm->aByteCode;
	/* Object containers */
	SySetInit(&pVm->aMemObj,&pVm->sAllocator,sizeof(ph7_value));
	SySetAlloc(&pVm->aMemObj,0xFF);
	/* Virtual machine internal containers */
	SyBlobInit(&pVm->sConsumer,&pVm->sAllocator);
	SyBlobInit(&pVm->sWorker,&pVm->sAllocator);
	SyBlobInit(&pVm->sArgv,&pVm->sAllocator);
	SySetInit(&pVm->aLitObj,&pVm->sAllocator,sizeof(ph7_value));
	SySetAlloc(&pVm->aLitObj,0xFF);
	SyHashInit(&pVm->hHostFunction,&pVm->sAllocator,0,0);
	SyHashInit(&pVm->hFunction,&pVm->sAllocator,0,0);
	SyHashInit(&pVm->hClass,&pVm->sAllocator,SyStrHash,SyStrnmicmp);
	SyHashInit(&pVm->hConstant,&pVm->sAllocator,0,0);
	SyHashInit(&pVm->hSuper,&pVm->sAllocator,0,0);
	SyHashInit(&pVm->hPDO,&pVm->sAllocator,0,0);
	SySetInit(&pVm->aFreeObj,&pVm->sAllocator,sizeof(VmSlot));
	SySetInit(&pVm->aSelf,&pVm->sAllocator,sizeof(ph7_class *));
	SySetInit(&pVm->aShutdown,&pVm->sAllocator,sizeof(VmShutdownCB));
	SySetInit(&pVm->aException,&pVm->sAllocator,sizeof(ph7_exception *));
	/* Configuration containers */
	SySetInit(&pVm->aFiles,&pVm->sAllocator,sizeof(SyString));
	SySetInit(&pVm->aPaths,&pVm->sAllocator,sizeof(SyString));
	SySetInit(&pVm->aIncluded,&pVm->sAllocator,sizeof(SyString));
	SySetInit(&pVm->aOB,&pVm->sAllocator,sizeof(VmObEntry));
	SySetInit(&pVm->aIOstream,&pVm->sAllocator,sizeof(ph7_io_stream *));
	/* Error callbacks containers */
	PH7_MemObjInit(&(*pVm),&pVm->aExceptionCB[0]);
	PH7_MemObjInit(&(*pVm),&pVm->aExceptionCB[1]);
	PH7_MemObjInit(&(*pVm),&pVm->aErrCB[0]);
	PH7_MemObjInit(&(*pVm),&pVm->aErrCB[1]);
	PH7_MemObjInit(&(*pVm),&pVm->sAssertCallback);
	/* Set a default recursion limit */
#if defined(__WINNT__) || defined(__UNIXES__)
	pVm->nMaxDepth = 32;
#else
	pVm->nMaxDepth = 16;
#endif
	/* Default assertion flags */
	pVm->iAssertFlags = PH7_ASSERT_WARNING; /* Issue a warning for each failed assertion */
	/* JSON return status */
	pVm->json_rc = JSON_ERROR_NONE;
	/* PRNG context */
	SyRandomnessInit(&pVm->sPrng,0,0);
	/* Install the null constant */
	pObj = PH7_ReserveConstObj(&(*pVm),0);
	if( pObj == 0 ){
		rc = SXERR_MEM;
		goto Err;
	}
	PH7_MemObjInit(pVm,pObj);
	/* Install the boolean TRUE constant */
	pObj = PH7_ReserveConstObj(&(*pVm),0);
	if( pObj == 0 ){
		rc = SXERR_MEM;
		goto Err;
	}
	PH7_MemObjInitFromBool(pVm,pObj,1);
	/* Install the boolean FALSE constant */
	pObj = PH7_ReserveConstObj(&(*pVm),0);
	if( pObj == 0 ){
		rc = SXERR_MEM;
		goto Err;
	}
	PH7_MemObjInitFromBool(pVm,pObj,0);
	/* Create the global frame */
	rc = VmEnterFrame(&(*pVm),0,0,0);
	if( rc != SXRET_OK ){
		goto Err;
	}
	/* Initialize the code generator */
	rc = PH7_InitCodeGenerator(pVm,pEngine->xConf.xErr,pEngine->xConf.pErrData);
	if( rc != SXRET_OK ){
		goto Err;
	}
	/* VM correctly initialized,set the magic number */
	pVm->nMagic = PH7_VM_INIT;
	SyStringInitFromBuf(&sBuiltin,PH7_BUILTIN_LIB,sizeof(PH7_BUILTIN_LIB)-1);
	/* Compile the built-in library */
	VmEvalChunk(&(*pVm),0,&sBuiltin,PH7_PHP_ONLY,FALSE);
	/* Reset the code generator */
	PH7_ResetCodeGenerator(&(*pVm),pEngine->xConf.xErr,pEngine->xConf.pErrData);
	return SXRET_OK;
Err:
	SyMemBackendRelease(&pVm->sAllocator);
	return rc;
}
/*
 * Default VM output consumer callback.That is,all VM output is redirected to this
 * routine which store the output in an internal blob.
 * The output can be extracted later after program execution [ph7_vm_exec()] via
 * the [ph7_vm_config()] interface with a configuration verb set to
 * PH7_VM_CONFIG_EXTRACT_OUTPUT.
 * Refer to the official docurmentation for additional information.
 * Note that for performance reason it's preferable to install a VM output
 * consumer callback via (PH7_VM_CONFIG_OUTPUT) rather than waiting for the VM
 * to finish executing and extracting the output.
 */
PH7_PRIVATE sxi32 PH7_VmBlobConsumer(
	const void *pOut,   /* VM Generated output*/
	unsigned int nLen,  /* Generated output length */
	void *pUserData     /* User private data */
	)
{
	 sxi32 rc;
	 /* Store the output in an internal BLOB */
	 rc = SyBlobAppend((SyBlob *)pUserData,pOut,nLen);
	 return rc;
}
#define VM_STACK_GUARD 16
/*
 * Allocate a new operand stack so that we can start executing
 * our compiled PHP program.
 * Return a pointer to the operand stack (array of ph7_values)
 * on success. NULL (Fatal error) on failure.
 */
static ph7_value * VmNewOperandStack(
	ph7_vm *pVm, /* Target VM */
	sxu32 nInstr /* Total numer of generated byte-code instructions */
	)
{
	ph7_value *pStack;
  /* No instruction ever pushes more than a single element onto the
  ** stack and the stack never grows on successive executions of the
  ** same loop. So the total number of instructions is an upper bound
  ** on the maximum stack depth required.
  **
  ** Allocation all the stack space we will ever need.
  */
	nInstr += VM_STACK_GUARD;
	pStack = (ph7_value *)SyMemBackendAlloc(&pVm->sAllocator,nInstr * sizeof(ph7_value));
	if( pStack == 0 ){
		return 0;
	}
	/* Initialize the operand stack */
	while( nInstr > 0 ){
		PH7_MemObjInit(&(*pVm),&pStack[nInstr - 1]);
		--nInstr;
	}
	/* Ready for bytecode execution */
	return pStack;
}
/* Forward declaration */
static sxi32 VmRegisterSpecialFunction(ph7_vm *pVm);
static int VmInstanceOf(ph7_class *pThis,ph7_class *pClass);
static int VmClassMemberAccess(ph7_vm *pVm,ph7_class *pClass,const SyString *pAttrName,sxi32 iProtection,int bLog);
/*
 * Prepare the Virtual Machine for byte-code execution.
 * This routine gets called by the PH7 engine after
 * successful compilation of the target PHP program.
 */
PH7_PRIVATE sxi32 PH7_VmMakeReady(
	ph7_vm *pVm /* Target VM */
	)
{
	SyHashEntry *pEntry;
	sxi32 rc;
	if( pVm->nMagic != PH7_VM_INIT ){
		/* Initialize your VM first */
		return SXERR_CORRUPT;
	}
	/* Mark the VM ready for byte-code execution */
	pVm->nMagic = PH7_VM_RUN; 
	/* Release the code generator now we have compiled our program */
	PH7_ResetCodeGenerator(pVm,0,0);
	/* Emit the DONE instruction */
	rc = PH7_VmEmitInstr(&(*pVm),PH7_OP_DONE,0,0,0,0);
	if( rc != SXRET_OK ){
		return SXERR_MEM;
	}
	/* Script return value */
	PH7_MemObjInit(&(*pVm),&pVm->sExec); /* Assume a NULL return value */
	/* Allocate a new operand stack */	
	pVm->aOps = VmNewOperandStack(&(*pVm),SySetUsed(pVm->pByteContainer));
	if( pVm->aOps == 0 ){
		return SXERR_MEM;
	}
	/* Set the default VM output consumer callback and it's 
	 * private data. */
	pVm->sVmConsumer.xConsumer = PH7_VmBlobConsumer;
	pVm->sVmConsumer.pUserData = &pVm->sConsumer;
	/* Allocate the reference table */
	pVm->nRefSize = 0x10; /* Must be a power of two for fast arithemtic */
	pVm->apRefObj = (VmRefObj **)SyMemBackendAlloc(&pVm->sAllocator,sizeof(VmRefObj *) * pVm->nRefSize);
	if( pVm->apRefObj == 0 ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_MEM;
	}
	/* Zero the reference table */
	SyZero(pVm->apRefObj,sizeof(VmRefObj *) * pVm->nRefSize);
	/* Register special functions first [i.e: print, json_encode(), func_get_args(), die, etc.] */
	rc = VmRegisterSpecialFunction(&(*pVm));
	if( rc != SXRET_OK ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return rc;
	}
	/* Create superglobals [i.e: $GLOBALS, $_GET, $_POST...] */
	rc = PH7_HashmapCreateSuper(&(*pVm));
	if( rc != SXRET_OK ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return rc;
	}
	/* Register built-in constants [i.e: PHP_EOL, PHP_OS...] */
	PH7_RegisterBuiltInConstant(&(*pVm));
	/* Register built-in functions [i.e: is_null(), array_diff(), strlen(), etc.] */
	PH7_RegisterBuiltInFunction(&(*pVm));
	/* Initialize and install static and constants class attributes */
	SyHashResetLoopCursor(&pVm->hClass);
	while((pEntry = SyHashGetNextEntry(&pVm->hClass)) != 0 ){
		rc = VmMountUserClass(&(*pVm),(ph7_class *)pEntry->pUserData);
		if( rc != SXRET_OK ){
			return rc;
		}
	}
	/* Random number betwwen 0 and 1023 used to generate unique ID */
	pVm->unique_id = PH7_VmRandomNum(&(*pVm)) & 1023;
	/* VM is ready for bytecode execution */
	return SXRET_OK;
}
/*
 * Reset a Virtual Machine to it's initial state.
 */
PH7_PRIVATE sxi32 PH7_VmReset(ph7_vm *pVm)
{
	if( pVm->nMagic != PH7_VM_RUN && pVm->nMagic != PH7_VM_EXEC ){
		return SXERR_CORRUPT;
	}
	/* TICKET 1433-003: As of this version, the VM is automatically reset */
	SyBlobReset(&pVm->sConsumer);
	PH7_MemObjRelease(&pVm->sExec);
	/* Set the ready flag */
	pVm->nMagic = PH7_VM_RUN;
	return SXRET_OK;
}
/*
 * Release a Virtual Machine.
 * Every virtual machine must be destroyed in order to avoid memory leaks.
 */
PH7_PRIVATE sxi32 PH7_VmRelease(ph7_vm *pVm)
{
	/* Set the stale magic number */
	pVm->nMagic = PH7_VM_STALE;
	/* Release the private memory subsystem */
	SyMemBackendRelease(&pVm->sAllocator);
	return SXRET_OK;
}
/*
 * Initialize a foreign function call context.
 * The context in which a foreign function executes is stored in a ph7_context object.
 * A pointer to a ph7_context object is always first parameter to application-defined foreign
 * functions.
 * The application-defined foreign function implementation will pass this pointer through into
 * calls to dozens of interfaces,these includes ph7_result_int(), ph7_result_string(), ph7_result_value(),
 * ph7_context_new_scalar(), ph7_context_alloc_chunk(), ph7_context_output(), ph7_context_throw_error()
 * and many more. Refer to the C/C++ Interfaces documentation for additional information.
 */
static sxi32 VmInitCallContext(
	ph7_context *pOut,    /* Call Context */
	ph7_vm *pVm,          /* Target VM */
	ph7_user_func *pFunc, /* Foreign function to execute shortly */
	ph7_value *pRet,      /* Store return value here*/
	sxi32 iFlags          /* Control flags */
	)
{
	pOut->pFunc = pFunc;
	pOut->pVm   = pVm;
	SySetInit(&pOut->sVar,&pVm->sAllocator,sizeof(ph7_value *));
	SySetInit(&pOut->sChunk,&pVm->sAllocator,sizeof(ph7_aux_data));
	/* Assume a null return value */
	MemObjSetType(pRet,MEMOBJ_NULL);
	pOut->pRet = pRet;
	pOut->iFlags = iFlags;
	return SXRET_OK;
}
/*
 * Release a foreign function call context and cleanup the mess
 * left behind.
 */
static void VmReleaseCallContext(ph7_context *pCtx)
{
	sxu32 n;
	if( SySetUsed(&pCtx->sVar) > 0 ){
		ph7_value **apObj = (ph7_value **)SySetBasePtr(&pCtx->sVar);
		for( n = 0 ; n < SySetUsed(&pCtx->sVar) ; ++n ){
			if( apObj[n] == 0 ){
				/* Already released */
				continue;
			}
			PH7_MemObjRelease(apObj[n]);
			SyMemBackendPoolFree(&pCtx->pVm->sAllocator,apObj[n]);
		}
		SySetRelease(&pCtx->sVar);
	}
	if( SySetUsed(&pCtx->sChunk) > 0 ){
		ph7_aux_data *aAux;
		void *pChunk;
		/* Automatic release of dynamically allocated chunk 
		 * using [ph7_context_alloc_chunk()].
		 */
		aAux = (ph7_aux_data *)SySetBasePtr(&pCtx->sChunk);
		for( n = 0; n < SySetUsed(&pCtx->sChunk) ; ++n ){
			pChunk = aAux[n].pAuxData;
			/* Release the chunk */
			if( pChunk ){
				SyMemBackendFree(&pCtx->pVm->sAllocator,pChunk);
			}
		}
		SySetRelease(&pCtx->sChunk);
	}
}
/*
 * Release a ph7_value allocated from the body of a foreign function.
 * Refer to [ph7_context_release_value()] for additional information.
 */
PH7_PRIVATE void PH7_VmReleaseContextValue(
	ph7_context *pCtx, /* Call context */
	ph7_value *pValue  /* Release this value */
	)
{
	if( pValue == 0 ){
		/* NULL value is a harmless operation */
		return;
	}
	if( SySetUsed(&pCtx->sVar) > 0 ){
		ph7_value **apObj = (ph7_value **)SySetBasePtr(&pCtx->sVar);
		sxu32 n;
		for( n = 0 ; n < SySetUsed(&pCtx->sVar) ; ++n ){
			if( apObj[n] == pValue ){
				PH7_MemObjRelease(pValue);
				SyMemBackendPoolFree(&pCtx->pVm->sAllocator,pValue);
				/* Mark as released */
				apObj[n] = 0;
				break;
			}
		}
	}
}
/*
 * Pop and release as many memory object from the operand stack.
 */
static void VmPopOperand(
	ph7_value **ppTos, /* Operand stack */
	sxi32 nPop         /* Total number of memory objects to pop */
	)
{
	ph7_value *pTos = *ppTos;
	while( nPop > 0 ){
		PH7_MemObjRelease(pTos);
		pTos--;
		nPop--;
	}
	/* Top of the stack */
	*ppTos = pTos;
}
/*
 * Reserve a memory object.
 * Return a pointer to the raw ph7_value on success. NULL on failure.
 */
PH7_PRIVATE ph7_value * PH7_ReserveMemObj(ph7_vm *pVm)
{
	ph7_value *pObj = 0;
	VmSlot *pSlot;
	sxu32 nIdx;
	/* Check for a free slot */
	nIdx = SXU32_HIGH; /* cc warning */
	pSlot = (VmSlot *)SySetPop(&pVm->aFreeObj);
	if( pSlot ){
		pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pSlot->nIdx);
		nIdx = pSlot->nIdx;
	}
	if( pObj == 0 ){
		/* Reserve a new memory object */
		pObj = VmReserveMemObj(&(*pVm),&nIdx);
		if( pObj == 0 ){
			return 0;
		}
	}
	/* Set a null default value */
	PH7_MemObjInit(&(*pVm),pObj);
	pObj->nIdx = nIdx;
	return pObj;
}
/*
 * Insert an entry by reference (not copy) in the given hashmap.
 */
static sxi32 VmHashmapRefInsert(
	ph7_hashmap *pMap, /* Target hashmap */
	const char *zKey,  /* Entry key */
	sxu32 nByte,       /* Key length */
	sxu32 nRefIdx      /* Entry index in the object pool */
	)
{
	ph7_value sKey;
	sxi32 rc;
	PH7_MemObjInitFromString(pMap->pVm,&sKey,0);
	PH7_MemObjStringAppend(&sKey,zKey,nByte);
	/* Perform the insertion */
	rc = PH7_HashmapInsertByRef(&(*pMap),&sKey,nRefIdx);
	PH7_MemObjRelease(&sKey);
	return rc;
}
/*
 * Extract a variable value from the top active VM frame.
 * Return a pointer to the variable value on success. 
 * NULL otherwise (non-existent variable/Out-of-memory,...).
 */
static ph7_value * VmExtractMemObj(
	ph7_vm *pVm,           /* Target VM */
	const SyString *pName, /* Variable name */
	int bDup,              /* True to duplicate variable name */
	int bCreate            /* True to create the variable if non-existent */
	)
{
	int bNullify = FALSE;
	SyHashEntry *pEntry;
	VmFrame *pFrame;
	ph7_value *pObj;
	sxu32 nIdx;
	sxi32 rc;
	/* Point to the top active frame */
	pFrame = pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent; /* Parent frame */
	}
	/* Perform the lookup */
	if( pName == 0 || pName->nByte < 1 ){
		static const SyString sAnnon = { " " , sizeof(char) };
		pName = &sAnnon;
		/* Always nullify the object */
		bNullify = TRUE;
		bDup = FALSE;
	}
	/* Check the superglobals table first */
	pEntry = SyHashGet(&pVm->hSuper,(const void *)pName->zString,pName->nByte);
	if( pEntry == 0 ){
		/* Query the top active frame */
		pEntry = SyHashGet(&pFrame->hVar,(const void *)pName->zString,pName->nByte);
		if( pEntry == 0 ){
			char *zName = (char *)pName->zString;
			VmSlot sLocal;
			if( !bCreate ){
				/* Do not create the variable,return NULL instead */
				return 0;
			}
			/* No such variable,automatically create a new one and install
			 * it in the current frame.
			 */
			pObj = PH7_ReserveMemObj(&(*pVm));
			if( pObj == 0 ){
				return 0;
			}
			nIdx = pObj->nIdx;
			if( bDup ){
				/* Duplicate name */
				zName = SyMemBackendStrDup(&pVm->sAllocator,pName->zString,pName->nByte);
				if( zName == 0 ){
					return 0;
				}
			}
			/* Link to the top active VM frame */
			rc = SyHashInsert(&pFrame->hVar,zName,pName->nByte,SX_INT_TO_PTR(nIdx));
			if( rc != SXRET_OK ){
				/* Return the slot to the free pool */
				sLocal.nIdx = nIdx;
				sLocal.pUserData = 0;
				SySetPut(&pVm->aFreeObj,(const void *)&sLocal);
				return 0;
			}
			if( pFrame->pParent != 0 ){
				/* Local variable */
				sLocal.nIdx = nIdx;
				SySetPut(&pFrame->sLocal,(const void *)&sLocal);
			}else{
				/* Register in the $GLOBALS array */
				VmHashmapRefInsert(pVm->pGlobal,pName->zString,pName->nByte,nIdx);
			}
			/* Install in the reference table */
			PH7_VmRefObjInstall(&(*pVm),nIdx,SyHashLastEntry(&pFrame->hVar),0,0);
			/* Save object index */
			pObj->nIdx = nIdx;
		}else{
			/* Extract variable contents */
			nIdx = (sxu32)SX_PTR_TO_INT(pEntry->pUserData);
			pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
			if( bNullify && pObj ){
				PH7_MemObjRelease(pObj);
			}
		}
	}else{
		/* Superglobal */
		nIdx = (sxu32)SX_PTR_TO_INT(pEntry->pUserData);
		pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
	}
	return pObj;
}
/*
 * Extract a superglobal variable such as $_GET,$_POST,$_HEADERS,.... 
 * Return a pointer to the variable value on success.NULL otherwise.
 */
static ph7_value * VmExtractSuper(
	ph7_vm *pVm,       /* Target VM */
	const char *zName, /* Superglobal name: NOT NULL TERMINATED */
	sxu32 nByte        /* zName length */
	)
{
	SyHashEntry *pEntry;
	ph7_value *pValue;
	sxu32 nIdx;
	/* Query the superglobal table */
	pEntry = SyHashGet(&pVm->hSuper,(const void *)zName,nByte);
	if( pEntry == 0 ){
		/* No such entry */
		return 0;
	}
	/* Extract the superglobal index in the global object pool */
	nIdx = SX_PTR_TO_INT(pEntry->pUserData);
	/* Extract the variable value  */
	pValue = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
	return pValue;
}
/*
 * Perform a raw hashmap insertion.
 * Refer to the [PH7_VmConfigure()] implementation for additional information.
 */
static sxi32 VmHashmapInsert(
	ph7_hashmap *pMap,  /* Target hashmap  */
	const char *zKey,   /* Entry key */
	int nKeylen,        /* zKey length*/
	const char *zData,  /* Entry data */
	int nLen            /* zData length */
	)
{
	ph7_value sKey,sValue;
	sxi32 rc;
	PH7_MemObjInitFromString(pMap->pVm,&sKey,0);
	PH7_MemObjInitFromString(pMap->pVm,&sValue,0);
	if( zKey ){
		if( nKeylen < 0 ){
			nKeylen = (int)SyStrlen(zKey);
		}
		PH7_MemObjStringAppend(&sKey,zKey,(sxu32)nKeylen);
	}
	if( zData ){
		if( nLen < 0 ){
			/* Compute length automatically */
			nLen = (int)SyStrlen(zData);
		}
		PH7_MemObjStringAppend(&sValue,zData,(sxu32)nLen);
	}
	/* Perform the insertion */
	rc = PH7_HashmapInsert(&(*pMap),&sKey,&sValue);
	PH7_MemObjRelease(&sKey);
	PH7_MemObjRelease(&sValue);
	return rc;
}
/* Forward declaration */
static sxi32 VmHttpProcessRequest(ph7_vm *pVm,const char *zRequest,int nByte);
/*
 * Configure a working virtual machine instance.
 *
 * This routine is used to configure a PH7 virtual machine obtained by a prior
 * successful call to one of the compile interface such as ph7_compile()
 * ph7_compile_v2() or ph7_compile_file().
 * The second argument to this function is an integer configuration option
 * that determines what property of the PH7 virtual machine is to be configured.
 * Subsequent arguments vary depending on the configuration option in the second
 * argument. There are many verbs but the most important are PH7_VM_CONFIG_OUTPUT,
 * PH7_VM_CONFIG_HTTP_REQUEST and PH7_VM_CONFIG_ARGV_ENTRY.
 * Refer to the official documentation for the list of allowed verbs.
 */
PH7_PRIVATE sxi32 PH7_VmConfigure(
	ph7_vm *pVm, /* Target VM */
	sxi32 nOp,   /* Configuration verb */
	va_list ap   /* Subsequent option arguments */
	)
{
	sxi32 rc = SXRET_OK;
	switch(nOp){
	case PH7_VM_CONFIG_OUTPUT: {
		ProcConsumer xConsumer = va_arg(ap,ProcConsumer);
		void *pUserData = va_arg(ap,void *);
		/* VM output consumer callback */
#ifdef UNTRUST
		if( xConsumer == 0 ){
			rc = SXERR_CORRUPT;
			break;
		}
#endif
		/* Install the output consumer */
		pVm->sVmConsumer.xConsumer = xConsumer;
		pVm->sVmConsumer.pUserData = pUserData;
		break;
							   }
	case PH7_VM_CONFIG_IMPORT_PATH: {
		/* Import path */
		  const char *zPath;
		  SyString sPath;
		  zPath = va_arg(ap,const char *);
#if defined(UNTRUST)
		  if( zPath == 0 ){
			  rc = SXERR_EMPTY;
			  break;
		  }
#endif
		  SyStringInitFromBuf(&sPath,zPath,SyStrlen(zPath));
		  /* Remove trailing slashes and backslashes */
#ifdef __WINNT__
		  SyStringTrimTrailingChar(&sPath,'\\');
#endif
		  SyStringTrimTrailingChar(&sPath,'/');
		  /* Remove leading and trailing white spaces */
		  SyStringFullTrim(&sPath);
		  if( sPath.nByte > 0 ){
			  /* Store the path in the corresponding conatiner */
			  rc = SySetPut(&pVm->aPaths,(const void *)&sPath);
		  }
		  break;
									 }
	case PH7_VM_CONFIG_ERR_REPORT:
		/* Run-Time Error report */
		pVm->bErrReport = 1;
		break;
	case PH7_VM_CONFIG_RECURSION_DEPTH:{
		/* Recursion depth */
		int nDepth = va_arg(ap,int);
		if( nDepth > 2 && nDepth < 1024 ){
			pVm->nMaxDepth = nDepth;
		}
		break;
									   }
	case PH7_VM_OUTPUT_LENGTH: {
		/* VM output length in bytes */
		sxu32 *pOut = va_arg(ap,sxu32 *);
#ifdef UNTRUST
		if( pOut == 0 ){
			rc = SXERR_CORRUPT;
			break;
		}
#endif
		*pOut = pVm->nOutputLen;
		break;
							   }

	case PH7_VM_CONFIG_CREATE_SUPER:
	case PH7_VM_CONFIG_CREATE_VAR: {
		/* Create a new superglobal/global variable */
		const char *zName = va_arg(ap,const char *);
		ph7_value *pValue = va_arg(ap,ph7_value *);
		SyHashEntry *pEntry;
		ph7_value *pObj;
		sxu32 nByte;
		sxu32 nIdx; 
#ifdef UNTRUST
		if( SX_EMPTY_STR(zName) || pValue == 0 ){
			rc = SXERR_CORRUPT;
			break;
		}
#endif
		nByte = SyStrlen(zName);
		if( nOp == PH7_VM_CONFIG_CREATE_SUPER ){
			/* Check if the superglobal is already installed */
			pEntry = SyHashGet(&pVm->hSuper,(const void *)zName,nByte);
		}else{
			/* Query the top active VM frame */
			pEntry = SyHashGet(&pVm->pFrame->hVar,(const void *)zName,nByte);
		}
		if( pEntry ){
			/* Variable already installed */
			nIdx = SX_PTR_TO_INT(pEntry->pUserData);
			/* Extract contents */
			pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
			if( pObj ){
				/* Overwrite old contents */
				PH7_MemObjStore(pValue,pObj);
			}
		}else{
			/* Install a new variable */
			pObj = PH7_ReserveMemObj(&(*pVm));
			if( pObj == 0 ){
				rc = SXERR_MEM;
				break;
			}
			nIdx = pObj->nIdx;
			/* Copy value */
			PH7_MemObjStore(pValue,pObj);
			if( nOp == PH7_VM_CONFIG_CREATE_SUPER ){
				/* Install the superglobal */
				rc = SyHashInsert(&pVm->hSuper,(const void *)zName,nByte,SX_INT_TO_PTR(nIdx));
			}else{
				/* Install in the current frame */
				rc = SyHashInsert(&pVm->pFrame->hVar,(const void *)zName,nByte,SX_INT_TO_PTR(nIdx));
			}
			if( rc == SXRET_OK ){
				SyHashEntry *pRef;
				if( nOp == PH7_VM_CONFIG_CREATE_SUPER ){
					pRef = SyHashLastEntry(&pVm->hSuper);
				}else{
					pRef = SyHashLastEntry(&pVm->pFrame->hVar);
				}
				/* Install in the reference table */
				PH7_VmRefObjInstall(&(*pVm),nIdx,pRef,0,0);
				if( nOp == PH7_VM_CONFIG_CREATE_SUPER || pVm->pFrame->pParent == 0){
					/* Register in the $GLOBALS array */
					VmHashmapRefInsert(pVm->pGlobal,zName,nByte,nIdx);
				}
			}
		}
		break;
									}
	case PH7_VM_CONFIG_SERVER_ATTR:
	case PH7_VM_CONFIG_ENV_ATTR: 
	case PH7_VM_CONFIG_SESSION_ATTR:
	case PH7_VM_CONFIG_POST_ATTR:
	case PH7_VM_CONFIG_GET_ATTR:
	case PH7_VM_CONFIG_COOKIE_ATTR:
	case PH7_VM_CONFIG_HEADER_ATTR: {
		const char *zKey   = va_arg(ap,const char *);
		const char *zValue = va_arg(ap,const char *);
		int nLen = va_arg(ap,int);
		ph7_hashmap *pMap;
		ph7_value *pValue;
		if( nOp == PH7_VM_CONFIG_ENV_ATTR ){
			/* Extract the $_ENV superglobal */
			pValue = VmExtractSuper(&(*pVm),"_ENV",sizeof("_ENV")-1);
		}else if(nOp == PH7_VM_CONFIG_POST_ATTR ){
			/* Extract the $_POST superglobal */
			pValue = VmExtractSuper(&(*pVm),"_POST",sizeof("_POST")-1);
		}else if(nOp == PH7_VM_CONFIG_GET_ATTR ){
			/* Extract the $_GET superglobal */
			pValue = VmExtractSuper(&(*pVm),"_GET",sizeof("_GET")-1);
		}else if(nOp == PH7_VM_CONFIG_COOKIE_ATTR ){
			/* Extract the $_COOKIE superglobal */
			pValue = VmExtractSuper(&(*pVm),"_COOKIE",sizeof("_COOKIE")-1);
		}else if(nOp == PH7_VM_CONFIG_SESSION_ATTR ){
			/* Extract the $_SESSION superglobal */
			pValue = VmExtractSuper(&(*pVm),"_SESSION",sizeof("_SESSION")-1);
		}else if( nOp == PH7_VM_CONFIG_HEADER_ATTR ){
			/* Extract the $_HEADER superglobale */
			pValue = VmExtractSuper(&(*pVm),"_HEADER",sizeof("_HEADER")-1);
		}else{
			/* Extract the $_SERVER superglobal */
			pValue = VmExtractSuper(&(*pVm),"_SERVER",sizeof("_SERVER")-1);
		}
		if( pValue == 0 || (pValue->iFlags & MEMOBJ_HASHMAP) == 0 ){
			/* No such entry */
			rc = SXERR_NOTFOUND;
			break;
		}
		/* Point to the hashmap */
		pMap = (ph7_hashmap *)pValue->x.pOther;
		/* Perform the insertion */
		rc = VmHashmapInsert(pMap,zKey,-1,zValue,nLen);
		break;
								   }
	case PH7_VM_CONFIG_ARGV_ENTRY:{
		/* Script arguments */
		const char *zValue = va_arg(ap,const char *);
		ph7_hashmap *pMap;
		ph7_value *pValue;
		sxu32 n;
		if( SX_EMPTY_STR(zValue) ){
			rc = SXERR_EMPTY;
			break;
		}
		/* Extract the $argv array */
		pValue = VmExtractSuper(&(*pVm),"argv",sizeof("argv")-1);
		if( pValue == 0 || (pValue->iFlags & MEMOBJ_HASHMAP) == 0 ){
			/* No such entry */
			rc = SXERR_NOTFOUND;
			break;
		}
		/* Point to the hashmap */
		pMap = (ph7_hashmap *)pValue->x.pOther;
		/* Perform the insertion */
		n = (sxu32)SyStrlen(zValue);
		rc = VmHashmapInsert(pMap,0,0,zValue,(int)n);
		if( rc == SXRET_OK ){
			if( pMap->nEntry > 1 ){
				/* Append space separator first */
				SyBlobAppend(&pVm->sArgv,(const void *)" ",sizeof(char));
			}
			SyBlobAppend(&pVm->sArgv,(const void *)zValue,n);
		}
		break;
								  }
	case PH7_VM_CONFIG_ERR_LOG_HANDLER: {
		/* error_log() consumer */
		ProcErrLog xErrLog = va_arg(ap,ProcErrLog);
		pVm->xErrLog = xErrLog;
		break;
										}
	case PH7_VM_CONFIG_EXEC_VALUE: {
		/* Script return value */
		ph7_value **ppValue = va_arg(ap,ph7_value **);
#ifdef UNTRUST
		if( ppValue == 0 ){
			rc = SXERR_CORRUPT;
			break;
		}
#endif
		*ppValue = &pVm->sExec;
		break;
								   }
	case PH7_VM_CONFIG_IO_STREAM: {
		/* Register an IO stream device */
		const ph7_io_stream *pStream = va_arg(ap,const ph7_io_stream *);
		/* Make sure we are dealing with a valid IO stream */
		if( pStream == 0 || pStream->zName == 0 || pStream->zName[0] == 0 ||
			pStream->xOpen == 0 || pStream->xRead == 0 ){
				/* Invalid stream */
				rc = SXERR_INVALID;
				break;
		}
		if( pVm->pDefStream == 0 && SyStrnicmp(pStream->zName,"file",sizeof("file")-1) == 0 ){
			/* Make the 'file://' stream the defaut stream device */
			pVm->pDefStream = pStream;
		}
		/* Insert in the appropriate container */
		rc = SySetPut(&pVm->aIOstream,(const void *)&pStream);
		break;
								  }
	case PH7_VM_CONFIG_EXTRACT_OUTPUT: {
		/* Point to the VM internal output consumer buffer */
		const void **ppOut = va_arg(ap,const void **);
		unsigned int *pLen = va_arg(ap,unsigned int *);
#ifdef UNTRUST
		if( ppOut == 0 || pLen == 0 ){
			rc = SXERR_CORRUPT;
			break;
		}
#endif
		*ppOut = SyBlobData(&pVm->sConsumer);
		*pLen  = SyBlobLength(&pVm->sConsumer);
		break;
									   }
	case PH7_VM_CONFIG_HTTP_REQUEST:{
		/* Raw HTTP request*/
		const char *zRequest = va_arg(ap,const char *);
		int nByte = va_arg(ap,int);
		if( SX_EMPTY_STR(zRequest) ){
			rc = SXERR_EMPTY;
			break;
		}
		if( nByte < 0 ){
			/* Compute length automatically */
			nByte = (int)SyStrlen(zRequest);
		}
		/* Process the request */
		rc = VmHttpProcessRequest(&(*pVm),zRequest,nByte);
		break;
									}
	default:
		/* Unknown configuration option */
		rc = SXERR_UNKNOWN;
		break;
	}
	return rc;
}
/* Forward declaration */
static const char * VmInstrToString(sxi32 nOp);
/*
 * This routine is used to dump PH7 byte-code instructions to a human readable
 * format.
 * The dump is redirected to the given consumer callback which is responsible
 * of consuming the generated dump perhaps redirecting it to its standard output
 * (STDOUT).
 */
static sxi32 VmByteCodeDump(
	SySet *pByteCode,       /* Bytecode container */
	ProcConsumer xConsumer, /* Dump consumer callback */
	void *pUserData         /* Last argument to xConsumer() */
	)
{
	static const char zDump[] = {
		"====================================================\n"
		"PH7 VM Dump   Copyright (C) 2011-2012 Symisc Systems\n"
		"                              http://www.symisc.net/\n"
		"====================================================\n"
	};
	VmInstr *pInstr,*pEnd;
	sxi32 rc = SXRET_OK;
	sxu32 n;
	/* Point to the PH7 instructions */
	pInstr = (VmInstr *)SySetBasePtr(pByteCode);
	pEnd   = &pInstr[SySetUsed(pByteCode)];
	n = 0;
	xConsumer((const void *)zDump,sizeof(zDump)-1,pUserData);
	/* Dump instructions */
	for(;;){
		if( pInstr >= pEnd ){
			/* No more instructions */
			break;
		}
		/* Format and call the consumer callback */
		rc = SyProcFormat(xConsumer,pUserData,"%s %8d %8u %#8x [%u]\n",
			VmInstrToString(pInstr->iOp),pInstr->iP1,pInstr->iP2,
			SX_PTR_TO_INT(pInstr->p3),n);
		if( rc != SXRET_OK ){
			/* Consumer routine request an operation abort */
			return rc;
		}
		++n;
		pInstr++; /* Next instruction in the stream */
	}
	return rc;
}
/* Forward declaration */
static int VmObConsumer(const void *pData,unsigned int nDataLen,void *pUserData);
static sxi32 VmUncaughtException(ph7_vm *pVm,ph7_class_instance *pThis);
static sxi32 VmThrowException(ph7_vm *pVm,ph7_class_instance *pThis);
/*
 * Consume a generated run-time error message by invoking the VM output
 * consumer callback.
 */
static sxi32 VmCallErrorHandler(ph7_vm *pVm,SyBlob *pMsg)
{
	ph7_output_consumer *pCons = &pVm->sVmConsumer;
	sxi32 rc = SXRET_OK;
	/* Append a new line */
#ifdef __WINNT__
	SyBlobAppend(pMsg,"\r\n",sizeof("\r\n")-1);
#else
	SyBlobAppend(pMsg,"\n",sizeof(char));
#endif
	/* Invoke the output consumer callback */
	rc = pCons->xConsumer(SyBlobData(pMsg),SyBlobLength(pMsg),pCons->pUserData);
	if( pCons->xConsumer != VmObConsumer ){
		/* Increment output length */
		pVm->nOutputLen += SyBlobLength(pMsg);
	}
	return rc;
}
/*
 * Throw a run-time error and invoke the supplied VM output consumer callback.
 * Refer to the implementation of [ph7_context_throw_error()] for additional
 * information.
 */
PH7_PRIVATE sxi32 PH7_VmThrowError(
	ph7_vm *pVm,         /* Target VM */
	SyString *pFuncName, /* Function name. NULL otherwise */
	sxi32 iErr,          /* Severity level: [i.e: Error,Warning or Notice]*/
	const char *zMessage /* Null terminated error message */
	)
{
	SyBlob *pWorker = &pVm->sWorker;
	SyString *pFile;
	char *zErr;
	sxi32 rc;
	if( !pVm->bErrReport ){
		/* Don't bother reporting errors */
		return SXRET_OK;
	}
	/* Reset the working buffer */
	SyBlobReset(pWorker);
	/* Peek the processed file if available */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	if( pFile ){
		/* Append file name */
		SyBlobAppend(pWorker,pFile->zString,pFile->nByte);
		SyBlobAppend(pWorker,(const void *)" ",sizeof(char));
	}
	zErr = "Error: ";
	switch(iErr){
	case PH7_CTX_WARNING: zErr = "Warning: "; break;
	case PH7_CTX_NOTICE:  zErr = "Notice: ";  break;
	default:
		iErr = PH7_CTX_ERR;
		break;
	}
	SyBlobAppend(pWorker,zErr,SyStrlen(zErr));
	if( pFuncName ){
		/* Append function name first */
		SyBlobAppend(pWorker,pFuncName->zString,pFuncName->nByte);
		SyBlobAppend(pWorker,"(): ",sizeof("(): ")-1);
	}
	SyBlobAppend(pWorker,zMessage,SyStrlen(zMessage));
	/* Consume the error message */
	rc = VmCallErrorHandler(&(*pVm),pWorker);
	return rc;
}
/*
 * Format and throw a run-time error and invoke the supplied VM output consumer callback.
 * Refer to the implementation of [ph7_context_throw_error_format()] for additional
 * information.
 */
static sxi32 VmThrowErrorAp(
	ph7_vm *pVm,         /* Target VM */
	SyString *pFuncName, /* Function name. NULL otherwise */
	sxi32 iErr,          /* Severity level: [i.e: Error,Warning or Notice] */
	const char *zFormat, /* Format message */
	va_list ap           /* Variable list of arguments */
	)
{
	SyBlob *pWorker = &pVm->sWorker;
	SyString *pFile;
	char *zErr;
	sxi32 rc;
	if( !pVm->bErrReport ){
		/* Don't bother reporting errors */
		return SXRET_OK;
	}
	/* Reset the working buffer */
	SyBlobReset(pWorker);
	/* Peek the processed file if available */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	if( pFile ){
		/* Append file name */
		SyBlobAppend(pWorker,pFile->zString,pFile->nByte);
		SyBlobAppend(pWorker,(const void *)" ",sizeof(char));
	}
	zErr = "Error: ";
	switch(iErr){
	case PH7_CTX_WARNING: zErr = "Warning: "; break;
	case PH7_CTX_NOTICE:  zErr = "Notice: ";  break;
	default:
		iErr = PH7_CTX_ERR;
		break;
	}
	SyBlobAppend(pWorker,zErr,SyStrlen(zErr));
	if( pFuncName ){
		/* Append function name first */
		SyBlobAppend(pWorker,pFuncName->zString,pFuncName->nByte);
		SyBlobAppend(pWorker,"(): ",sizeof("(): ")-1);
	}
	SyBlobFormatAp(pWorker,zFormat,ap);
	/* Consume the error message */
	rc = VmCallErrorHandler(&(*pVm),pWorker);
	return rc;
}
/*
 * Format and throw a run-time error and invoke the supplied VM output consumer callback.
 * Refer to the implementation of [ph7_context_throw_error_format()] for additional
 * information.
 * ------------------------------------
 * Simple boring wrapper function.
 * ------------------------------------
 */
static sxi32 VmErrorFormat(ph7_vm *pVm,sxi32 iErr,const char *zFormat,...)
{
	va_list ap;
	sxi32 rc;
	va_start(ap,zFormat);
	rc = VmThrowErrorAp(&(*pVm),0,iErr,zFormat,ap);
	va_end(ap);
	return rc;
}
/*
 * Format and throw a run-time error and invoke the supplied VM output consumer callback.
 * Refer to the implementation of [ph7_context_throw_error_format()] for additional
 * information.
 * ------------------------------------
 * Simple boring wrapper function.
 * ------------------------------------
 */
PH7_PRIVATE sxi32 PH7_VmThrowErrorAp(ph7_vm *pVm,SyString *pFuncName,sxi32 iErr,const char *zFormat,va_list ap)
{
	sxi32 rc;
	rc = VmThrowErrorAp(&(*pVm),&(*pFuncName),iErr,zFormat,ap);
	return rc;
}
/*
 * Execute as much of a PH7 bytecode program as we can then return.
 *
 * [PH7_VmMakeReady()] must be called before this routine in order to
 * close the program with a final OP_DONE and to set up the default
 * consumer routines and other stuff. Refer to the implementation
 * of [PH7_VmMakeReady()] for additional information.
 * If the installed VM output consumer callback ever returns PH7_ABORT
 * then the program execution is halted.
 * After this routine has finished, [PH7_VmRelease()] or [PH7_VmReset()]
 * should be used respectively to clean up the mess that was left behind
 * or to reset the VM to it's initial state.
 */
static sxi32 VmByteCodeExec(
	ph7_vm *pVm,         /* Target VM */
	VmInstr *aInstr,     /* PH7 bytecode program */
	ph7_value *pStack,   /* Operand stack */
	int nTos,            /* Top entry in the operand stack (usually -1) */
	ph7_value *pResult,  /* Store program return value here. NULL otherwise */
	sxu32 *pLastRef,     /* Last referenced ph7_value index */
	int is_callback      /* TRUE if we are executing a callback */
	)
{
	VmInstr *pInstr;
	ph7_value *pTos;
	SySet aArg;
	sxi32 pc;
	sxi32 rc;
	/* Argument container */
	SySetInit(&aArg,&pVm->sAllocator,sizeof(ph7_value *));
	if( nTos < 0 ){
		pTos = &pStack[-1];
	}else{
		pTos = &pStack[nTos];
	}
	pc = 0;
	/* Execute as much as we can */
	for(;;){
		/* Fetch the instruction to execute */
		pInstr = &aInstr[pc];
		rc = SXRET_OK;
/*
 * What follows here is a massive switch statement where each case implements a
 * separate instruction in the virtual machine.  If we follow the usual
 * indentation convention each case should be indented by 6 spaces.  But
 * that is a lot of wasted space on the left margin.  So the code within
 * the switch statement will break with convention and be flush-left.
 */
		switch(pInstr->iOp){
/*
 * DONE: P1 * * 
 *
 * Program execution completed: Clean up the mess left behind
 * and return immediately.
 */
case PH7_OP_DONE:
	if( pInstr->iP1 ){
#ifdef UNTRUST
		if( pTos < pStack ){
			goto Abort;
		}
#endif
		if( pLastRef ){
			*pLastRef = pTos->nIdx;
		}
		if( pResult ){
			/* Execution result */
			PH7_MemObjStore(pTos,pResult);
		}		
		VmPopOperand(&pTos,1);
	}else if( pLastRef ){
		/* Nothing referenced */
		*pLastRef = SXU32_HIGH;
	}
	goto Done;
/*
 * HALT: P1 * *
 *
 * Program execution aborted: Clean up the mess left behind
 * and abort immediately.
 */
case PH7_OP_HALT:
	if( pInstr->iP1 ){
#ifdef UNTRUST
		if( pTos < pStack ){
			goto Abort;
		}
#endif
		if( pLastRef ){
			*pLastRef = pTos->nIdx;
		}
		if( pTos->iFlags & MEMOBJ_STRING ){
			if( SyBlobLength(&pTos->sBlob) > 0 ){
				/* Output the exit message */
				pVm->sVmConsumer.xConsumer(SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob),
					pVm->sVmConsumer.pUserData);
				if( pVm->sVmConsumer.xConsumer != VmObConsumer ){
					/* Increment output length */
					pVm->nOutputLen += SyBlobLength(&pTos->sBlob);
				}
			}
		}else if(pTos->iFlags & MEMOBJ_INT ){
			/* Record exit status */
			pVm->iExitStatus = (sxi32)pTos->x.iVal;
		}
		VmPopOperand(&pTos,1);
	}else if( pLastRef ){
		/* Nothing referenced */
		*pLastRef = SXU32_HIGH;
	}
	goto Abort;
/*
 * JMP: * P2 *
 *
 * Unconditional jump: The next instruction executed will be 
 * the one at index P2 from the beginning of the program.
 */
case PH7_OP_JMP:
	pc = pInstr->iP2 - 1;
	break;
/*
 * JZ: P1 P2 *
 *
 * Take the jump if the top value is zero (FALSE jump).Pop the top most
 * entry in the stack if P1 is zero. 
 */
case PH7_OP_JZ:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Get a boolean value */
	if((pTos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pTos);
	}
	if( !pTos->x.iVal ){
		/* Take the jump */
		pc = pInstr->iP2 - 1;
	}
	if( !pInstr->iP1 ){
		VmPopOperand(&pTos,1);
	}
	break;
/*
 * JNZ: P1 P2 *
 *
 * Take the jump if the top value is not zero (TRUE jump).Pop the top most
 * entry in the stack if P1 is zero.
 */
case PH7_OP_JNZ:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Get a boolean value */
	if((pTos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pTos);
	}
	if( pTos->x.iVal ){
		/* Take the jump */
		pc = pInstr->iP2 - 1;
	}
	if( !pInstr->iP1 ){
		VmPopOperand(&pTos,1);
	}
	break;
/*
 * NOOP: * * *
 *
 * Do nothing. This instruction is often useful as a jump
 * destination.
 */
case PH7_OP_NOOP:
	break;
/*
 * POP: P1 * *
 *
 * Pop P1 elements from the operand stack.
 */
case PH7_OP_POP: {
	sxi32 n = pInstr->iP1;
	if( &pTos[-n+1] < pStack ){
		/* TICKET 1433-51 Stack underflow must be handled at run-time */
		n = (sxi32)(pTos - pStack);
	}
	VmPopOperand(&pTos,n);
	break;
				 }
/*
 * CVT_INT: * * *
 *
 * Force the top of the stack to be an integer.
 */
case PH7_OP_CVT_INT:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if((pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	/* Invalidate any prior representation */
	MemObjSetType(pTos,MEMOBJ_INT);
	break;
/*
 * CVT_REAL: * * *
 *
 * Force the top of the stack to be a real.
 */
case PH7_OP_CVT_REAL:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if((pTos->iFlags & MEMOBJ_REAL) == 0 ){
		PH7_MemObjToReal(pTos);
	}
	/* Invalidate any prior representation */
	MemObjSetType(pTos,MEMOBJ_REAL);
	break;
/*
 * CVT_STR: * * *
 *
 * Force the top of the stack to be a string.
 */
case PH7_OP_CVT_STR:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
		PH7_MemObjToString(pTos);
	}
	break;
/*
 * CVT_BOOL: * * *
 *
 * Force the top of the stack to be a boolean.
 */
case PH7_OP_CVT_BOOL:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( (pTos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pTos);
	}
	break;
/*
 * CVT_NULL: * * *
 *
 * Nullify the top of the stack.
 */
case PH7_OP_CVT_NULL:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	PH7_MemObjRelease(pTos);
	break;
/*
 * CVT_NUMC: * * *
 *
 * Force the top of the stack to be a numeric type (integer,real or both).
 */
case PH7_OP_CVT_NUMC:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Force a numeric cast */
	PH7_MemObjToNumeric(pTos);
	break;
/*
 * CVT_ARRAY: * * *
 *
 * Force the top of the stack to be a hashmap aka 'array'.
 */
case PH7_OP_CVT_ARRAY:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Force a hashmap cast */
	rc = PH7_MemObjToHashmap(pTos);
	if( rc != SXRET_OK ){
		/* Not so fatal,emit a simple warning */
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_WARNING,
			"PH7 engine is running out of memory while performing an array cast");
	}
	break;
/*
 * CVT_OBJ: * * *
 *
 * Force the top of the stack to be a class instance (Object in the PHP jargon).
 */
case PH7_OP_CVT_OBJ:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( (pTos->iFlags & MEMOBJ_OBJ) == 0 ){
		/* Force a 'stdClass()' cast */
		PH7_MemObjToObject(pTos);
	}
	break;
/*
 * ERR_CTRL * * *
 *
 * Error control operator. 
 */
case PH7_OP_ERR_CTRL:
	/* 
	 * TICKET 1433-038:
	 * As of this version ,the error control operator '@' is a no-op,simply
	 * use the public API,to control error output.
	 */
	break;
/*
 * IS_A * * *
 *
 * Pop the top two operands from the stack and check whether the first operand
 * is an object and is an instance of the second operand (which must be a string
 * holding a class name or an object).
 * Push TRUE on success. FALSE otherwise.
 */
case PH7_OP_IS_A:{
	ph7_value *pNos = &pTos[-1];
	sxi32 iRes = 0; /* assume false by default */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	if( pNos->iFlags& MEMOBJ_OBJ ){
		ph7_class_instance *pThis = (ph7_class_instance *)pNos->x.pOther;
		ph7_class *pClass = 0;
		/* Extract the target class */
		if( pTos->iFlags & MEMOBJ_OBJ ){
			/* Instance already loaded */
			pClass = ((ph7_class_instance *)pTos->x.pOther)->pClass;
		}else if( pTos->iFlags & MEMOBJ_STRING && SyBlobLength(&pTos->sBlob) > 0 ){
			/* Perform the query */
			pClass = PH7_VmExtractClass(&(*pVm),(const char *)SyBlobData(&pTos->sBlob),
				SyBlobLength(&pTos->sBlob),FALSE,0);
		}
		if( pClass ){
			/* Perform the query */
			iRes = VmInstanceOf(pThis->pClass,pClass);
		}
	}
	/* Push result */
	VmPopOperand(&pTos,1);
	PH7_MemObjRelease(pTos);
	pTos->x.iVal = iRes;
	MemObjSetType(pTos,MEMOBJ_BOOL);
	break;
				 }

/*
 * LOADC P1 P2 *
 *
 * Load a constant [i.e: PHP_EOL,PHP_OS,__TIME__,...] indexed at P2 in the constant pool.
 * If P1 is set,then this constant is candidate for expansion via user installable callbacks.
 */
case PH7_OP_LOADC: {
	ph7_value *pObj;
	/* Reserve a room */
	pTos++;
	if( (pObj = (ph7_value *)SySetAt(&pVm->aLitObj,pInstr->iP2)) != 0 ){
		if( pInstr->iP1 == 1 && SyBlobLength(&pObj->sBlob) <= 64 ){
			SyHashEntry *pEntry;
			/* Candidate for expansion via user defined callbacks */
			pEntry = SyHashGet(&pVm->hConstant,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob));
			if( pEntry ){
				ph7_constant *pCons = (ph7_constant *)pEntry->pUserData;
				/* Set a NULL default value */
				MemObjSetType(pTos,MEMOBJ_NULL);
				SyBlobReset(&pTos->sBlob);
				/* Invoke the callback and deal with the expanded value */
				pCons->xExpand(pTos,pCons->pUserData);
				/* Mark as constant */
				pTos->nIdx = SXU32_HIGH;
				break;
			}
		}
		PH7_MemObjLoad(pObj,pTos);
	}else{
		/* Set a NULL value */
		MemObjSetType(pTos,MEMOBJ_NULL);
	}
	/* Mark as constant */
	pTos->nIdx = SXU32_HIGH;
	break;
				  }
/*
 * LOAD: P1 * P3
 *
 * Load a variable where it's name is taken from the top of the stack or
 * from the P3 operand.
 * If P1 is set,then perform a lookup only.In other words do not create
 * the variable if non existent and push the NULL constant instead.
 */
case PH7_OP_LOAD:{
	ph7_value *pObj;
	SyString sName;
	if( pInstr->p3 == 0 ){
		/* Take the variable name from the top of the stack */
#ifdef UNTRUST
		if( pTos < pStack ){
			goto Abort;
		}
#endif
		/* Force a string cast */
		if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(pTos);
		}
		SyStringInitFromBuf(&sName,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
	}else{
		SyStringInitFromBuf(&sName,pInstr->p3,SyStrlen((const char *)pInstr->p3));
		/* Reserve a room for the target object */
		pTos++;
	}
	/* Extract the requested memory object */
	pObj = VmExtractMemObj(&(*pVm),&sName,pInstr->p3 ? FALSE : TRUE,pInstr->iP1 != 1);
	if( pObj == 0 ){
		if( pInstr->iP1 ){
			/* Variable not found,load NULL */
			if( !pInstr->p3 ){
				PH7_MemObjRelease(pTos);
			}else{
				MemObjSetType(pTos,MEMOBJ_NULL);
			}
			pTos->nIdx = SXU32_HIGH; /* Mark as constant */
			break;
		}else{
			/* Fatal error */
			VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Fatal, PH7 engine is running out of memory while loading variable '%z'",&sName);
			goto Abort;
		}
	}
	/* Load variable contents */
	PH7_MemObjLoad(pObj,pTos);
	pTos->nIdx = pObj->nIdx;
	break;
				   }
/*
 * LOAD_MAP P1 * *
 *
 * Allocate a new empty hashmap (array in the PHP jargon) and push it on the stack.
 * If the P1 operand is greater than zero then pop P1 elements from the
 * stack and insert them (key => value pair) in the new hashmap.
 */
case PH7_OP_LOAD_MAP: {
	ph7_hashmap *pMap;
	/* Allocate a new hashmap instance */
	pMap = PH7_NewHashmap(&(*pVm),0,0);
	if( pMap == 0 ){
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,
			"Fatal, PH7 engine is running out of memory while loading array at instruction #:%d",pc);
		goto Abort;
	}
	if( pInstr->iP1 > 0 ){
		ph7_value *pEntry = &pTos[-pInstr->iP1+1]; /* Point to the first entry */
		/* Perform the insertion */
		while( pEntry < pTos ){
			if( pEntry[1].iFlags & MEMOBJ_REFERENCE ){
				/* Insertion by reference */
				PH7_HashmapInsertByRef(pMap,
					(pEntry->iFlags & MEMOBJ_NULL) ? 0 /* Automatic index assign */ : pEntry,
					(sxu32)pEntry[1].x.iVal
					);
			}else{
				/* Standard insertion */
				PH7_HashmapInsert(pMap,
					(pEntry->iFlags & MEMOBJ_NULL) ? 0 /* Automatic index assign */ : pEntry,
					&pEntry[1]
				);
			}
			/* Next pair on the stack */
			pEntry += 2;
		}
		/* Pop P1 elements */
		VmPopOperand(&pTos,pInstr->iP1);
	}
	/* Push the hashmap */
	pTos++;
	pTos->nIdx = SXU32_HIGH;
	pTos->x.pOther = pMap;
	MemObjSetType(pTos,MEMOBJ_HASHMAP);
	break;
					  }
/*
 * LOAD_LIST: P1 * *
 *  
 * Assign hashmap entries values to the top P1 entries.
 * This is the VM implementation of the list() PHP construct.
 * Caveats:
 *  This implementation support only a single nesting level.
 */
case PH7_OP_LOAD_LIST: {
	ph7_value *pEntry;
	if( pInstr->iP1 <= 0 ){
		/* Empty list,break immediately */
		break;
	}
	pEntry = &pTos[-pInstr->iP1+1];
#ifdef UNTRUST
	if( &pEntry[-1] < pStack ){
		goto Abort;
	}
#endif
	if( pEntry[-1].iFlags & MEMOBJ_HASHMAP ){
		ph7_hashmap *pMap = (ph7_hashmap *)pEntry[-1].x.pOther;
		ph7_hashmap_node *pNode;
		ph7_value sKey,*pObj;
		/* Start Copying */
		PH7_MemObjInitFromInt(&(*pVm),&sKey,0);
		while( pEntry <= pTos ){
			if( pEntry->nIdx != SXU32_HIGH /* Variable not constant */  ){
				rc = PH7_HashmapLookup(pMap,&sKey,&pNode);
				if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pEntry->nIdx)) != 0 ){
					if( rc == SXRET_OK ){
						/* Store node value */
						PH7_HashmapExtractNodeValue(pNode,pObj,TRUE);
					}else{
						/* Nullify the variable */
						PH7_MemObjRelease(pObj);
					}
				}
			}
			sKey.x.iVal++; /* Next numeric index */
			pEntry++;
		}
	}
	VmPopOperand(&pTos,pInstr->iP1);
	break;
					   }
/*
 * LOAD_IDX: P1 P2 *
 *
 * Load a hasmap entry where it's index (either numeric or string) is taken
 * from the stack.
 * If the index does not refer to a valid element,then push the NULL constant
 * instead.
 */
case PH7_OP_LOAD_IDX: {
	ph7_hashmap_node *pNode = 0; /* cc warning */
	ph7_hashmap *pMap = 0;
	ph7_value *pIdx;
	pIdx = 0;
	if( pInstr->iP1 == 0 ){
		if( !pInstr->iP2){
			/* No available index,load NULL */
			if( pTos >= pStack ){
				PH7_MemObjRelease(pTos);
			}else{
				/* TICKET 1433-020: Empty stack */
				pTos++;
				MemObjSetType(pTos,MEMOBJ_NULL);
				pTos->nIdx = SXU32_HIGH;
			}
			/* Emit a notice */
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_NOTICE,
				"Array: Attempt to access an undefined index,PH7 is loading NULL");
			break;
		}
	}else{
		pIdx = pTos;
		pTos--;
	}
	if( pTos->iFlags & MEMOBJ_STRING ){
		/* String access */
		if( pIdx ){
			sxu32 nOfft;
			if( (pIdx->iFlags & MEMOBJ_INT) == 0 ){
				/* Force an int cast */
				PH7_MemObjToInteger(pIdx);
			}
			nOfft = (sxu32)pIdx->x.iVal;
			if( nOfft >= SyBlobLength(&pTos->sBlob) ){
				/* Invalid offset,load null */
				PH7_MemObjRelease(pTos);
			}else{
				const char *zData = (const char *)SyBlobData(&pTos->sBlob);
				int c = zData[nOfft];
				PH7_MemObjRelease(pTos);
				MemObjSetType(pTos,MEMOBJ_STRING);
				SyBlobAppend(&pTos->sBlob,(const void *)&c,sizeof(char));
			}
		}else{
			/* No available index,load NULL */
			MemObjSetType(pTos,MEMOBJ_NULL);
		}
		break;
	}
	if( pInstr->iP2 && (pTos->iFlags & MEMOBJ_HASHMAP) == 0 ){
		if( pTos->nIdx != SXU32_HIGH ){
			ph7_value *pObj;
			if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
				PH7_MemObjToHashmap(pObj);
				PH7_MemObjLoad(pObj,pTos);
			}
		}
	}
	rc = SXERR_NOTFOUND; /* Assume the index is invalid */
	if( pTos->iFlags & MEMOBJ_HASHMAP ){
		/* Point to the hashmap */
		pMap = (ph7_hashmap *)pTos->x.pOther;
		if( pIdx ){
			/* Load the desired entry */
			rc = PH7_HashmapLookup(pMap,pIdx,&pNode);
		}
		if( rc != SXRET_OK && pInstr->iP2 ){
			/* Create a new empty entry */
			rc = PH7_HashmapInsert(pMap,pIdx,0);
			if( rc == SXRET_OK ){
				/* Point to the last inserted entry */
				pNode = pMap->pLast;
			}
		}
	}
	if( pIdx ){
		PH7_MemObjRelease(pIdx);
	}
	if( rc == SXRET_OK ){
		/* Load entry contents */
		if( pMap->iRef < 2 ){
			/* TICKET 1433-42: Array will be deleted shortly,so we will make a copy
			 * of the entry value,rather than pointing to it.
			 */
			pTos->nIdx = SXU32_HIGH;
			PH7_HashmapExtractNodeValue(pNode,pTos,TRUE);
		}else{
			pTos->nIdx = pNode->nValIdx;
			PH7_HashmapExtractNodeValue(pNode,pTos,FALSE);
			PH7_HashmapUnref(pMap);
		}
	}else{
		/* No such entry,load NULL */
		PH7_MemObjRelease(pTos);
		pTos->nIdx = SXU32_HIGH;
	}
	break;
					  }
/*
 * LOAD_CLOSURE * * P3
 *
 * Set-up closure environment described by the P3 oeprand and push the closure
 * name in the stack.
 */
case PH7_OP_LOAD_CLOSURE:{
	ph7_vm_func *pFunc = (ph7_vm_func *)pInstr->p3;
	if( pFunc->iFlags & VM_FUNC_CLOSURE ){
		ph7_vm_func_closure_env *aEnv,*pEnv,sEnv;
		ph7_vm_func *pClosure;
		char *zName;
		sxu32 mLen;
		sxu32 n;
		/* Create a new VM function */
		pClosure = (ph7_vm_func *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_vm_func));
		/* Generate an unique closure name */
		zName = (char *)SyMemBackendAlloc(&pVm->sAllocator,sizeof("[closure_]")+64);
		if( pClosure == 0 || zName == 0){
			PH7_VmThrowError(pVm,0,E_ERROR,"Fatal: PH7 is running out of memory while creating closure environment");
			goto Abort;
		}
		mLen = SyBufferFormat(zName,sizeof("[closure_]")+64,"[closure_%d]",pVm->closure_cnt++);
		while( SyHashGet(&pVm->hFunction,zName,mLen) != 0 && mLen < (sizeof("[closure_]")+60/* not 64 */) ){
			mLen = SyBufferFormat(zName,sizeof("[closure_]")+64,"[closure_%d]",pVm->closure_cnt++);
		}
		/* Zero the stucture */
		SyZero(pClosure,sizeof(ph7_vm_func));
		/* Perform a structure assignment on read-only items */
		pClosure->aArgs = pFunc->aArgs;
		pClosure->aByteCode = pFunc->aByteCode;
		pClosure->aStatic = pFunc->aStatic;
		pClosure->iFlags = pFunc->iFlags;
		pClosure->pUserData = pFunc->pUserData;
		pClosure->sSignature = pFunc->sSignature;
		SyStringInitFromBuf(&pClosure->sName,zName,mLen);
		/* Register the closure */
		PH7_VmInstallUserFunction(pVm,pClosure,0);
		/* Set up closure environment */
		SySetInit(&pClosure->aClosureEnv,&pVm->sAllocator,sizeof(ph7_vm_func_closure_env));
		aEnv = (ph7_vm_func_closure_env *)SySetBasePtr(&pFunc->aClosureEnv);
		for( n = 0 ; n < SySetUsed(&pFunc->aClosureEnv) ; ++n ){
			ph7_value *pValue;
			pEnv = &aEnv[n];
			sEnv.sName  = pEnv->sName;
			sEnv.iFlags = pEnv->iFlags;
			sEnv.nIdx = SXU32_HIGH;
			PH7_MemObjInit(pVm,&sEnv.sValue);
			if( sEnv.iFlags & VM_FUNC_ARG_BY_REF ){
				/* Pass by reference */
				PH7_VmThrowError(pVm,0,PH7_CTX_WARNING,
					"Closure: Pass by reference is disabled in the current release of the PH7 engine,PH7 is switching to pass by value"
					);
			}
			/* Standard pass by value */
			pValue = VmExtractMemObj(pVm,&sEnv.sName,FALSE,FALSE);
			if( pValue ){
				/* Copy imported value */
				PH7_MemObjStore(pValue,&sEnv.sValue);
			}
			/* Insert the imported variable */
			SySetPut(&pClosure->aClosureEnv,(const void *)&sEnv);
		}
		/* Finally,load the closure name on the stack */
		pTos++;
		PH7_MemObjStringAppend(pTos,zName,mLen);
	}
	break;
						 }
/*
 * STORE * P2 P3
 *
 * Perform a store (Assignment) operation.
 */
case PH7_OP_STORE: {
	ph7_value *pObj;
	SyString sName;
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( pInstr->iP2 ){
		sxu32 nIdx;
		/* Member store operation */
		nIdx = pTos->nIdx;
		VmPopOperand(&pTos,1);
		if( nIdx == SXU32_HIGH ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,
				"Cannot perform assignment on a constant class attribute,PH7 is loading NULL");
			pTos->nIdx = SXU32_HIGH;
		}else{
			/* Point to the desired memory object */
			pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
			if( pObj ){
				/* Perform the store operation */
				PH7_MemObjStore(pTos,pObj);
			}
		}
		break;
	}else if( pInstr->p3 == 0 ){
		/* Take the variable name from the next on the stack */
		if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(pTos);
		}
		SyStringInitFromBuf(&sName,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
		pTos--;
#ifdef UNTRUST
		if( pTos < pStack  ){
			goto Abort;
		}
#endif
	}else{
		SyStringInitFromBuf(&sName,pInstr->p3,SyStrlen((const char *)pInstr->p3));
	}
	/* Extract the desired variable and if not available dynamically create it */
	pObj = VmExtractMemObj(&(*pVm),&sName,pInstr->p3 ? FALSE : TRUE,TRUE);
	if( pObj == 0 ){
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,
			"Fatal, PH7 engine is running out of memory while loading variable '%z'",&sName);
		goto Abort;
	}
	if( !pInstr->p3 ){
		PH7_MemObjRelease(&pTos[1]);
	}
	/* Perform the store operation */
	PH7_MemObjStore(pTos,pObj);
	break;
				   }
/*
 * STORE_IDX:   P1 * P3
 * STORE_IDX_R: P1 * P3
 *
 * Perfrom a store operation an a hashmap entry.
 */
case PH7_OP_STORE_IDX:
case PH7_OP_STORE_IDX_REF: {
	ph7_hashmap *pMap = 0; /* cc  warning */
	ph7_value *pKey;
	sxu32 nIdx;
	if( pInstr->iP1 ){
		/* Key is next on stack */
		pKey = pTos;
		pTos--;
	}else{
		pKey = 0;
	}
	nIdx = pTos->nIdx;
	if( pTos->iFlags & MEMOBJ_HASHMAP ){
		/* Hashmap already loaded */
		pMap = (ph7_hashmap *)pTos->x.pOther;
		if( pMap->iRef < 2 ){
			/* TICKET 1433-48: Prevent garbage collection */
			pMap->iRef = 2;
		}
	}else{
		ph7_value *pObj;
		pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
		if( pObj == 0 ){
			if( pKey ){
			  PH7_MemObjRelease(pKey);
			}
			VmPopOperand(&pTos,1);
			break;
		}
		/* Phase#1: Load the array */
		if( (pObj->iFlags & MEMOBJ_STRING) && (pInstr->iOp != PH7_OP_STORE_IDX_REF) ){
			VmPopOperand(&pTos,1);
			if( (pTos->iFlags&MEMOBJ_STRING) == 0 ){
				/* Force a string cast */
				PH7_MemObjToString(pTos);
			}
			if( pKey == 0 ){
				/* Append string */
				if( SyBlobLength(&pTos->sBlob) > 0 ){
					SyBlobAppend(&pObj->sBlob,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
				}
			}else{
				sxu32 nOfft;
				if((pKey->iFlags & MEMOBJ_INT)){
					/* Force an int cast */
					PH7_MemObjToInteger(pKey);
				}
				nOfft = (sxu32)pKey->x.iVal;
				if( nOfft < SyBlobLength(&pObj->sBlob) && SyBlobLength(&pTos->sBlob) > 0 ){
					const char *zBlob = (const char *)SyBlobData(&pTos->sBlob);
					char *zData = (char *)SyBlobData(&pObj->sBlob);
					zData[nOfft] = zBlob[0];
				}else{
					if( SyBlobLength(&pTos->sBlob) >= sizeof(char) ){
						/* Perform an append operation */
						SyBlobAppend(&pObj->sBlob,SyBlobData(&pTos->sBlob),sizeof(char));
					}
				}
			}
			if( pKey ){
			  PH7_MemObjRelease(pKey);
			}
			break;
		}else if( (pObj->iFlags & MEMOBJ_HASHMAP) == 0 ){
			/* Force a hashmap cast  */
			rc = PH7_MemObjToHashmap(pObj);
			if( rc != SXRET_OK ){
				VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Fatal, PH7 engine is running out of memory while creating a new array");
				goto Abort;
			}
		}
		pMap = (ph7_hashmap *)pObj->x.pOther;
	}
	VmPopOperand(&pTos,1);
	/* Phase#2: Perform the insertion */
	if( pInstr->iOp == PH7_OP_STORE_IDX_REF && pTos->nIdx != SXU32_HIGH ){
		/* Insertion by reference */
		PH7_HashmapInsertByRef(pMap,pKey,pTos->nIdx);
	}else{
		PH7_HashmapInsert(pMap,pKey,pTos);
	}
	if( pKey ){
		PH7_MemObjRelease(pKey);
	}
	break;
					   }
/*
 * INCR: P1 * *
 *
 * Force a numeric cast and increment the top of the stack by 1.
 * If the P1 operand is set then perform a duplication of the top of
 * the stack and increment after that.
 */
case PH7_OP_INCR:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( (pTos->iFlags & (MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES)) == 0 ){
		if( pTos->nIdx != SXU32_HIGH ){
			ph7_value *pObj;
			if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
				/* Force a numeric cast */
				PH7_MemObjToNumeric(pObj);
				if( pObj->iFlags & MEMOBJ_REAL ){
					pObj->rVal++;
					/* Try to get an integer representation */
					PH7_MemObjTryInteger(pTos);
				}else{
					pObj->x.iVal++;
					MemObjSetType(pTos,MEMOBJ_INT);
				}
				if( pInstr->iP1 ){
					/* Pre-icrement */
					PH7_MemObjStore(pObj,pTos);
				}
			}
		}else{
			if( pInstr->iP1 ){
				/* Force a numeric cast */
				PH7_MemObjToNumeric(pTos);
				/* Pre-increment */
				if( pTos->iFlags & MEMOBJ_REAL ){
					pTos->rVal++;
					/* Try to get an integer representation */
					PH7_MemObjTryInteger(pTos);
				}else{
					pTos->x.iVal++;
					MemObjSetType(pTos,MEMOBJ_INT);
				}
			}
		}
	}
	break;
/*
 * DECR: P1 * *
 *
 * Force a numeric cast and decrement the top of the stack by 1.
 * If the P1 operand is set then perform a duplication of the top of the stack 
 * and decrement after that.
 */
case PH7_OP_DECR:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( (pTos->iFlags & (MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES|MEMOBJ_NULL)) == 0 ){
		/* Force a numeric cast */
		PH7_MemObjToNumeric(pTos);
		if( pTos->nIdx != SXU32_HIGH ){
			ph7_value *pObj;
			if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
				/* Force a numeric cast */
				PH7_MemObjToNumeric(pObj);
				if( pObj->iFlags & MEMOBJ_REAL ){
					pObj->rVal--;
					/* Try to get an integer representation */
					PH7_MemObjTryInteger(pTos);
				}else{
					pObj->x.iVal--;
					MemObjSetType(pTos,MEMOBJ_INT);
				}
				if( pInstr->iP1 ){
					/* Pre-icrement */
					PH7_MemObjStore(pObj,pTos);
				}
			}
		}else{
			if( pInstr->iP1 ){
				/* Pre-increment */
				if( pTos->iFlags & MEMOBJ_REAL ){
					pTos->rVal--;
					/* Try to get an integer representation */
					PH7_MemObjTryInteger(pTos);
				}else{
					pTos->x.iVal--;
					MemObjSetType(pTos,MEMOBJ_INT);
				}
			}
		}
	}
	break;
/*
 * UMINUS: * * *
 *
 * Perform a unary minus operation.
 */
case PH7_OP_UMINUS:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Force a numeric (integer,real or both) cast */
	PH7_MemObjToNumeric(pTos);
	if( pTos->iFlags & MEMOBJ_REAL ){
		pTos->rVal = -pTos->rVal;
	}
	if( pTos->iFlags & MEMOBJ_INT ){
		pTos->x.iVal = -pTos->x.iVal;
	}
	break;				   
/*
 * UPLUS: * * *
 *
 * Perform a unary plus operation.
 */
case PH7_OP_UPLUS:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Force a numeric (integer,real or both) cast */
	PH7_MemObjToNumeric(pTos);
	if( pTos->iFlags & MEMOBJ_REAL ){
		pTos->rVal = +pTos->rVal;
	}
	if( pTos->iFlags & MEMOBJ_INT ){
		pTos->x.iVal = +pTos->x.iVal;
	}
	break;
/*
 * OP_LNOT: * * *
 *
 * Interpret the top of the stack as a boolean value.  Replace it
 * with its complement.
 */
case PH7_OP_LNOT:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Force a boolean cast */
	if( (pTos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pTos);
	}
	pTos->x.iVal = !pTos->x.iVal;
	break;
/*
 * OP_BITNOT: * * *
 *
 * Interpret the top of the stack as an value.Replace it
 * with its ones-complement.
 */
case PH7_OP_BITNOT:
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Force an integer cast */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	pTos->x.iVal = ~pTos->x.iVal;
	break;
/* OP_MUL * * *
 * OP_MUL_STORE * * *
 *
 * Pop the top two elements from the stack, multiply them together,
 * and push the result back onto the stack.
 */
case PH7_OP_MUL:
case PH7_OP_MUL_STORE: {
	ph7_value *pNos = &pTos[-1];
	/* Force the operand to be numeric */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	PH7_MemObjToNumeric(pTos);
	PH7_MemObjToNumeric(pNos);
	/* Perform the requested operation */
	if( MEMOBJ_REAL & (pTos->iFlags|pNos->iFlags) ){
		/* Floating point arithemic */
		ph7_real a,b,r;
		if( (pTos->iFlags & MEMOBJ_REAL) == 0 ){
			PH7_MemObjToReal(pTos);
		}
		if( (pNos->iFlags & MEMOBJ_REAL) == 0 ){
			PH7_MemObjToReal(pNos);
		}
		a = pNos->rVal;
		b = pTos->rVal;
		r = a * b;
		/* Push the result */
		pNos->rVal = r;
		MemObjSetType(pNos,MEMOBJ_REAL);
		/* Try to get an integer representation */
		PH7_MemObjTryInteger(pNos);
	}else{
		/* Integer arithmetic */
		sxi64 a,b,r;
		a = pNos->x.iVal;
		b = pTos->x.iVal;
		r = a * b;
		/* Push the result */
		pNos->x.iVal = r;
		MemObjSetType(pNos,MEMOBJ_INT);
	}
	if( pInstr->iOp == PH7_OP_MUL_STORE ){
		ph7_value *pObj;
		if( pTos->nIdx == SXU32_HIGH ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
		}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
			PH7_MemObjStore(pNos,pObj);
		}
	}
	VmPopOperand(&pTos,1);
	break;
				 }
/* OP_ADD * * *
 *
 * Pop the top two elements from the stack, add them together,
 * and push the result back onto the stack.
 */
case PH7_OP_ADD:{
	ph7_value *pNos = &pTos[-1];
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Perform the addition */
	PH7_MemObjAdd(pNos,pTos,FALSE);
	VmPopOperand(&pTos,1);
	break;
				}
/*
 * OP_ADD_STORE * * *
 *
 * Pop the top two elements from the stack, add them together,
 * and push the result back onto the stack.
 */
case PH7_OP_ADD_STORE:{
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
	sxu32 nIdx;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Perform the addition */
	nIdx = pTos->nIdx;
	PH7_MemObjAdd(pTos,pNos,TRUE);
	/* Peform the store operation */
	if( nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx)) != 0 ){
		PH7_MemObjStore(pTos,pObj);
	}
	/* Ticket 1433-35: Perform a stack dup */
	PH7_MemObjStore(pTos,pNos);
	VmPopOperand(&pTos,1);
	break;
				}
/* OP_SUB * * *
 *
 * Pop the top two elements from the stack, subtract the
 * first (what was next on the stack) from the second (the
 * top of the stack) and push the result back onto the stack.
 */
case PH7_OP_SUB: {
	ph7_value *pNos = &pTos[-1];
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	if( MEMOBJ_REAL & (pTos->iFlags|pNos->iFlags) ){
		/* Floating point arithemic */
		ph7_real a,b,r;
		if( (pTos->iFlags & MEMOBJ_REAL) == 0 ){
			PH7_MemObjToReal(pTos);
		}
		if( (pNos->iFlags & MEMOBJ_REAL) == 0 ){
			PH7_MemObjToReal(pNos);
		}
		a = pNos->rVal;
		b = pTos->rVal;
		r = a - b; 
		/* Push the result */
		pNos->rVal = r;
		MemObjSetType(pNos,MEMOBJ_REAL);
		/* Try to get an integer representation */
		PH7_MemObjTryInteger(pNos);
	}else{
		/* Integer arithmetic */
		sxi64 a,b,r;
		a = pNos->x.iVal;
		b = pTos->x.iVal;
		r = a - b;
		/* Push the result */
		pNos->x.iVal = r;
		MemObjSetType(pNos,MEMOBJ_INT);
	}
	VmPopOperand(&pTos,1);
	break;
				 }
/* OP_SUB_STORE * * *
 *
 * Pop the top two elements from the stack, subtract the
 * first (what was next on the stack) from the second (the
 * top of the stack) and push the result back onto the stack.
 */
case PH7_OP_SUB_STORE: {
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	if( MEMOBJ_REAL & (pTos->iFlags|pNos->iFlags) ){
		/* Floating point arithemic */
		ph7_real a,b,r;
		if( (pTos->iFlags & MEMOBJ_REAL) == 0 ){
			PH7_MemObjToReal(pTos);
		}
		if( (pNos->iFlags & MEMOBJ_REAL) == 0 ){
			PH7_MemObjToReal(pNos);
		}
		a = pTos->rVal;
		b = pNos->rVal;
		r = a - b; 
		/* Push the result */
		pNos->rVal = r;
		MemObjSetType(pNos,MEMOBJ_REAL);
		/* Try to get an integer representation */
		PH7_MemObjTryInteger(pNos);
	}else{
		/* Integer arithmetic */
		sxi64 a,b,r;
		a = pTos->x.iVal;
		b = pNos->x.iVal;
		r = a - b;
		/* Push the result */
		pNos->x.iVal = r;
		MemObjSetType(pNos,MEMOBJ_INT);
	}
	if( pTos->nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
		PH7_MemObjStore(pNos,pObj);
	}
	VmPopOperand(&pTos,1);
	break;
				 }

/*
 * OP_MOD * * *
 *
 * Pop the top two elements from the stack, divide the
 * first (what was next on the stack) from the second (the
 * top of the stack) and push the remainder after division 
 * onto the stack.
 * Note: Only integer arithemtic is allowed.
 */
case PH7_OP_MOD:{
	ph7_value *pNos = &pTos[-1];
	sxi64 a,b,r;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be integer */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pNos);
	}
	/* Perform the requested operation */
	a = pNos->x.iVal;
	b = pTos->x.iVal;
	if( b == 0 ){
		r = 0;
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Division by zero %qd%%0",a);
		/* goto Abort; */
	}else{
		r = a%b;
	}
	/* Push the result */
	pNos->x.iVal = r;
	MemObjSetType(pNos,MEMOBJ_INT);
	VmPopOperand(&pTos,1);
	break;
				}
/*
 * OP_MOD_STORE * * *
 *
 * Pop the top two elements from the stack, divide the
 * first (what was next on the stack) from the second (the
 * top of the stack) and push the remainder after division 
 * onto the stack.
 * Note: Only integer arithemtic is allowed.
 */
case PH7_OP_MOD_STORE: {
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
	sxi64 a,b,r;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be integer */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pNos);
	}
	/* Perform the requested operation */
	a = pTos->x.iVal;
	b = pNos->x.iVal;
	if( b == 0 ){
		r = 0;
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Division by zero %qd%%0",a);
		/* goto Abort; */
	}else{
		r = a%b;
	}
	/* Push the result */
	pNos->x.iVal = r;
	MemObjSetType(pNos,MEMOBJ_INT);
	if( pTos->nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
		PH7_MemObjStore(pNos,pObj);
	}
	VmPopOperand(&pTos,1);
	break;
				}
/*
 * OP_DIV * * *
 * 
 * Pop the top two elements from the stack, divide the
 * first (what was next on the stack) from the second (the
 * top of the stack) and push the result onto the stack.
 * Note: Only floating point arithemtic is allowed.
 */
case PH7_OP_DIV:{
	ph7_value *pNos = &pTos[-1];
	ph7_real a,b,r;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be real */
	if( (pTos->iFlags & MEMOBJ_REAL) == 0 ){
		PH7_MemObjToReal(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_REAL) == 0 ){
		PH7_MemObjToReal(pNos);
	}
	/* Perform the requested operation */
	a = pNos->rVal;
	b = pTos->rVal;
	if( b == 0 ){
		/* Division by zero */
		r = 0;
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Division by zero");
		/* goto Abort; */
	}else{
		r = a/b;
		/* Push the result */
		pNos->rVal = r;
		MemObjSetType(pNos,MEMOBJ_REAL);
		/* Try to get an integer representation */
		PH7_MemObjTryInteger(pNos);
	}
	VmPopOperand(&pTos,1);
	break;
				}
/*
 * OP_DIV_STORE * * *
 * 
 * Pop the top two elements from the stack, divide the
 * first (what was next on the stack) from the second (the
 * top of the stack) and push the result onto the stack.
 * Note: Only floating point arithemtic is allowed.
 */
case PH7_OP_DIV_STORE:{
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
	ph7_real a,b,r;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be real */
	if( (pTos->iFlags & MEMOBJ_REAL) == 0 ){
		PH7_MemObjToReal(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_REAL) == 0 ){
		PH7_MemObjToReal(pNos);
	}
	/* Perform the requested operation */
	a = pTos->rVal;
	b = pNos->rVal;
	if( b == 0 ){
		/* Division by zero */
		r = 0;
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Division by zero %qd/0",a);
		/* goto Abort; */
	}else{
		r = a/b;
		/* Push the result */
		pNos->rVal = r;
		MemObjSetType(pNos,MEMOBJ_REAL);
		/* Try to get an integer representation */
		PH7_MemObjTryInteger(pNos);
	}
	if( pTos->nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
		PH7_MemObjStore(pNos,pObj);
	}
	VmPopOperand(&pTos,1);
	break;
				}
/* OP_BAND * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the bit-wise AND of the
 * two elements.
*/
/* OP_BOR * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the bit-wise OR of the
 * two elements.
 */
/* OP_BXOR * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the bit-wise XOR of the
 * two elements.
 */
case PH7_OP_BAND:
case PH7_OP_BOR:
case PH7_OP_BXOR:{
	ph7_value *pNos = &pTos[-1];
	sxi64 a,b,r;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be integer */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pNos);
	}
	/* Perform the requested operation */
	a = pNos->x.iVal;
	b = pTos->x.iVal;
	switch(pInstr->iOp){
	case PH7_OP_BOR_STORE:
	case PH7_OP_BOR:  r = a|b; break;
	case PH7_OP_BXOR_STORE:
	case PH7_OP_BXOR: r = a^b; break;
	case PH7_OP_BAND_STORE:
	case PH7_OP_BAND:
	default:          r = a&b; break;
	}
	/* Push the result */
	pNos->x.iVal = r;
	MemObjSetType(pNos,MEMOBJ_INT);
	VmPopOperand(&pTos,1);
	break;
				 }
/* OP_BAND_STORE * * * 
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the bit-wise AND of the
 * two elements.
*/
/* OP_BOR_STORE * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the bit-wise OR of the
 * two elements.
 */
/* OP_BXOR_STORE * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the bit-wise XOR of the
 * two elements.
 */
case PH7_OP_BAND_STORE:
case PH7_OP_BOR_STORE:
case PH7_OP_BXOR_STORE:{
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
	sxi64 a,b,r;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be integer */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pNos);
	}
	/* Perform the requested operation */
	a = pTos->x.iVal;
	b = pNos->x.iVal;
	switch(pInstr->iOp){
	case PH7_OP_BOR_STORE:
	case PH7_OP_BOR:  r = a|b; break;
	case PH7_OP_BXOR_STORE:
	case PH7_OP_BXOR: r = a^b; break;
	case PH7_OP_BAND_STORE:
	case PH7_OP_BAND:
	default:          r = a&b; break;
	}
	/* Push the result */
	pNos->x.iVal = r;
	MemObjSetType(pNos,MEMOBJ_INT);
	if( pTos->nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
		PH7_MemObjStore(pNos,pObj);
	}
	VmPopOperand(&pTos,1);
	break;
				 }
/* OP_SHL * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the second element shifted
 * left by N bits where N is the top element on the stack.
 * Note: Only integer arithmetic is allowed.
 */
/* OP_SHR * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the second element shifted
 * right by N bits where N is the top element on the stack.
 * Note: Only integer arithmetic is allowed.
 */
case PH7_OP_SHL:
case PH7_OP_SHR: {
	ph7_value *pNos = &pTos[-1];
	sxi64 a,r;
	sxi32 b;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be integer */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pNos);
	}
	/* Perform the requested operation */
	a = pNos->x.iVal;
	b = (sxi32)pTos->x.iVal;
	if( pInstr->iOp == PH7_OP_SHL ){
		r = a << b;
	}else{
		r = a >> b;
	}
	/* Push the result */
	pNos->x.iVal = r;
	MemObjSetType(pNos,MEMOBJ_INT);
	VmPopOperand(&pTos,1);
	break;
				 }
/*  OP_SHL_STORE * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the second element shifted
 * left by N bits where N is the top element on the stack.
 * Note: Only integer arithmetic is allowed.
 */
/* OP_SHR_STORE * * *
 *
 * Pop the top two elements from the stack.  Convert both elements
 * to integers.  Push back onto the stack the second element shifted
 * right by N bits where N is the top element on the stack.
 * Note: Only integer arithmetic is allowed.
 */
case PH7_OP_SHL_STORE:
case PH7_OP_SHR_STORE: {
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
	sxi64 a,r;
	sxi32 b;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force the operands to be integer */
	if( (pTos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pTos);
	}
	if( (pNos->iFlags & MEMOBJ_INT) == 0 ){
		PH7_MemObjToInteger(pNos);
	}
	/* Perform the requested operation */
	a = pTos->x.iVal;
	b = (sxi32)pNos->x.iVal;
	if( pInstr->iOp == PH7_OP_SHL_STORE ){
		r = a << b;
	}else{
		r = a >> b;
	}
	/* Push the result */
	pNos->x.iVal = r;
	MemObjSetType(pNos,MEMOBJ_INT);
	if( pTos->nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
		PH7_MemObjStore(pNos,pObj);
	}
	VmPopOperand(&pTos,1);
	break;
				 }
/* CAT:  P1 * *
 *
 * Pop P1 elements from the stack. Concatenate them togeher and push the result
 * back.
 */
case PH7_OP_CAT:{
	ph7_value *pNos,*pCur;
	if( pInstr->iP1 < 1 ){
		pNos = &pTos[-1];
	}else{
		pNos = &pTos[-pInstr->iP1+1];
	}
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force a string cast */
	if( (pNos->iFlags & MEMOBJ_STRING) == 0 ){
		PH7_MemObjToString(pNos);
	}
	pCur = &pNos[1];
	while( pCur <= pTos ){
		if( (pCur->iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(pCur);
		}
		/* Perform the concatenation */
		if( SyBlobLength(&pCur->sBlob) > 0 ){
			PH7_MemObjStringAppend(pNos,(const char *)SyBlobData(&pCur->sBlob),SyBlobLength(&pCur->sBlob));
		}
		SyBlobRelease(&pCur->sBlob);
		pCur++;
	}
	pTos = pNos;
	break;
				}
/*  CAT_STORE: * * *
 *
 * Pop two elements from the stack. Concatenate them togeher and push the result
 * back.
 */
case PH7_OP_CAT_STORE:{
	ph7_value *pNos = &pTos[-1];
	ph7_value *pObj;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	if((pTos->iFlags & MEMOBJ_STRING) == 0 ){
		/* Force a string cast */
		PH7_MemObjToString(pTos);
	}
	if((pNos->iFlags & MEMOBJ_STRING) == 0 ){
		/* Force a string cast */
		PH7_MemObjToString(pNos);
	}
	/* Perform the concatenation (Reverse order) */
	if( SyBlobLength(&pNos->sBlob) > 0 ){
		PH7_MemObjStringAppend(pTos,(const char *)SyBlobData(&pNos->sBlob),SyBlobLength(&pNos->sBlob));
	}
	/* Perform the store operation */
	if( pTos->nIdx == SXU32_HIGH ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Cannot perform assignment on a constant class attribute");
	}else if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pTos->nIdx)) != 0 ){
		PH7_MemObjStore(pTos,pObj);
	}
	PH7_MemObjStore(pTos,pNos);
	VmPopOperand(&pTos,1);
	break;
				}
/* OP_AND: * * *
 *
 * Pop two values off the stack.  Take the logical AND of the
 * two values and push the resulting boolean value back onto the
 * stack. 
 */
/* OP_OR: * * *
 *
 * Pop two values off the stack.  Take the logical OR of the
 * two values and push the resulting boolean value back onto the
 * stack. 
 */
case PH7_OP_LAND:
case PH7_OP_LOR: {
	ph7_value *pNos = &pTos[-1];
	sxi32 v1, v2;    /* 0==TRUE, 1==FALSE, 2==UNKNOWN or NULL */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force a boolean cast */
	if((pTos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pTos);
	}
	if((pNos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pNos);
	}
	v1 = pNos->x.iVal == 0 ? 1 : 0;
	v2 = pTos->x.iVal == 0 ? 1 : 0;
	if( pInstr->iOp == PH7_OP_LAND ){
		static const unsigned char and_logic[] = { 0, 1, 2, 1, 1, 1, 2, 1, 2 };
		v1 = and_logic[v1*3+v2];
	}else{
		static const unsigned char or_logic[] = { 0, 0, 0, 0, 1, 2, 0, 2, 2 };
		v1 = or_logic[v1*3+v2];
	}
	if( v1 == 2 ){
		v1 = 1;
	}
	VmPopOperand(&pTos,1);
	pTos->x.iVal = v1 == 0 ? 1 : 0;
	MemObjSetType(pTos,MEMOBJ_BOOL);
	break;
				 }
/* OP_LXOR: * * *
 *
 * Pop two values off the stack. Take the logical XOR of the
 * two values and push the resulting boolean value back onto the
 * stack.
 * According to the PHP language reference manual:
 *  $a xor $b is evaluated to TRUE if either $a or $b is 
 *  TRUE,but not both.
 */
case PH7_OP_LXOR:{
	ph7_value *pNos = &pTos[-1];
	sxi32 v = 0;
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force a boolean cast */
	if((pTos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pTos);
	}
	if((pNos->iFlags & MEMOBJ_BOOL) == 0 ){
		PH7_MemObjToBool(pNos);
	}
	if( (pNos->x.iVal && !pTos->x.iVal) || (pTos->x.iVal && !pNos->x.iVal) ){
		v = 1;
	}
	VmPopOperand(&pTos,1);
	pTos->x.iVal = v;
	MemObjSetType(pTos,MEMOBJ_BOOL);
	break;
				 }
/* OP_EQ P1 P2 P3
 *
 * Pop the top two elements from the stack.  If they are equal, then
 * jump to instruction P2.  Otherwise, continue to the next instruction.
 * If P2 is zero, do not jump.  Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not. 
 */
/* OP_NEQ P1 P2 P3
 *
 * Pop the top two elements from the stack. If they are not equal, then
 * jump to instruction P2. Otherwise, continue to the next instruction.
 * If P2 is zero, do not jump.  Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 */
case PH7_OP_EQ:
case PH7_OP_NEQ: {
	ph7_value *pNos = &pTos[-1];
	/* Perform the comparison and act accordingly */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	rc = PH7_MemObjCmp(pNos,pTos,FALSE,0);
	if( pInstr->iOp == PH7_OP_EQ ){
		rc = rc == 0;
	}else{
		rc = rc != 0;
	}
	VmPopOperand(&pTos,1);
	if( !pInstr->iP2 ){
		/* Push comparison result without taking the jump */
		PH7_MemObjRelease(pTos);
		pTos->x.iVal = rc;
		/* Invalidate any prior representation */
		MemObjSetType(pTos,MEMOBJ_BOOL);
	}else{
		if( rc ){
			/* Jump to the desired location */
			pc = pInstr->iP2 - 1;
			VmPopOperand(&pTos,1);
		}
	}
	break;
				 }
/* OP_TEQ P1 P2 *
 *
 * Pop the top two elements from the stack. If they have the same type and are equal
 * then jump to instruction P2. Otherwise, continue to the next instruction.
 * If P2 is zero, do not jump. Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not. 
 */
case PH7_OP_TEQ: {
	ph7_value *pNos = &pTos[-1];
	/* Perform the comparison and act accordingly */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	rc = PH7_MemObjCmp(pNos,pTos,TRUE,0) == 0;
	VmPopOperand(&pTos,1);
	if( !pInstr->iP2 ){
		/* Push comparison result without taking the jump */
		PH7_MemObjRelease(pTos);
		pTos->x.iVal = rc;
		/* Invalidate any prior representation */
		MemObjSetType(pTos,MEMOBJ_BOOL);
	}else{
		if( rc ){
			/* Jump to the desired location */
			pc = pInstr->iP2 - 1;
			VmPopOperand(&pTos,1);
		}
	}
	break;
				 }
/* OP_TNE P1 P2 *
 *
 * Pop the top two elements from the stack.If they are not equal an they are not 
 * of the same type, then jump to instruction P2. Otherwise, continue to the next 
 * instruction.
 * If P2 is zero, do not jump. Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 * 
 */
case PH7_OP_TNE: {
	ph7_value *pNos = &pTos[-1];
	/* Perform the comparison and act accordingly */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	rc = PH7_MemObjCmp(pNos,pTos,TRUE,0) != 0;
	VmPopOperand(&pTos,1);
	if( !pInstr->iP2 ){
		/* Push comparison result without taking the jump */
		PH7_MemObjRelease(pTos);
		pTos->x.iVal = rc;
		/* Invalidate any prior representation */
		MemObjSetType(pTos,MEMOBJ_BOOL);
	}else{
		if( rc ){
			/* Jump to the desired location */
			pc = pInstr->iP2 - 1;
			VmPopOperand(&pTos,1);
		}
	}
	break;
				 }
/* OP_LT P1 P2 P3
 *
 * Pop the top two elements from the stack. If the second element (the top of stack)
 * is less than the first (next on stack),then jump to instruction P2.Otherwise
 * continue to the next instruction. In other words, jump if pNos<pTos.
 * If P2 is zero, do not jump.Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 * 
 */
/* OP_LE P1 P2 P3
 *
 * Pop the top two elements from the stack. If the second element (the top of stack)
 * is less than or equal to the first (next on stack),then jump to instruction P2.
 * Otherwise continue to the next instruction. In other words, jump if pNos<pTos.
 * If P2 is zero, do not jump.Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 * 
 */
case PH7_OP_LT:
case PH7_OP_LE: {
	ph7_value *pNos = &pTos[-1];
	/* Perform the comparison and act accordingly */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	rc = PH7_MemObjCmp(pNos,pTos,FALSE,0);
	if( pInstr->iOp == PH7_OP_LE ){
		rc = rc < 1;
	}else{
		rc = rc < 0;
	}
	VmPopOperand(&pTos,1);
	if( !pInstr->iP2 ){
		/* Push comparison result without taking the jump */
		PH7_MemObjRelease(pTos);
		pTos->x.iVal = rc;
		/* Invalidate any prior representation */
		MemObjSetType(pTos,MEMOBJ_BOOL);
	}else{
		if( rc ){
			/* Jump to the desired location */
			pc = pInstr->iP2 - 1;
			VmPopOperand(&pTos,1);
		}
	}
	break;
				}
/* OP_GT P1 P2 P3
 *
 * Pop the top two elements from the stack. If the second element (the top of stack)
 * is greater than the first (next on stack),then jump to instruction P2.Otherwise
 * continue to the next instruction. In other words, jump if pNos<pTos.
 * If P2 is zero, do not jump.Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 * 
 */
/* OP_GE P1 P2 P3
 *
 * Pop the top two elements from the stack. If the second element (the top of stack)
 * is greater than or equal to the first (next on stack),then jump to instruction P2.
 * Otherwise continue to the next instruction. In other words, jump if pNos<pTos.
 * If P2 is zero, do not jump.Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 * 
 */
case PH7_OP_GT:
case PH7_OP_GE: {
	ph7_value *pNos = &pTos[-1];
	/* Perform the comparison and act accordingly */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	rc = PH7_MemObjCmp(pNos,pTos,FALSE,0);
	if( pInstr->iOp == PH7_OP_GE ){
		rc = rc >= 0;
	}else{
		rc = rc > 0;
	}
	VmPopOperand(&pTos,1);
	if( !pInstr->iP2 ){
		/* Push comparison result without taking the jump */
		PH7_MemObjRelease(pTos);
		pTos->x.iVal = rc;
		/* Invalidate any prior representation */
		MemObjSetType(pTos,MEMOBJ_BOOL);
	}else{
		if( rc ){
			/* Jump to the desired location */
			pc = pInstr->iP2 - 1;
			VmPopOperand(&pTos,1);
		}
	}
	break;
				}
/* OP_SEQ P1 P2 *
 * Strict string comparison.
 * Pop the top two elements from the stack. If they are equal (pure text comparison)
 * then jump to instruction P2.  Otherwise, continue to the next instruction.
 * If either operand is NULL then the comparison result is FALSE.
 * The SyMemcmp() routine is used for the comparison. For a numeric comparison
 * use PH7_OP_EQ.
 * If P2 is zero, do not jump.Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 */
/* OP_SNE P1 P2 *
 * Strict string comparison.
 * Pop the top two elements from the stack. If they are not equal (pure text comparison)
 * then jump to instruction P2.  Otherwise, continue to the next instruction.
 * If either operand is NULL then the comparison result is FALSE.
 * The SyMemcmp() routine is used for the comparison. For a numeric comparison
 * use PH7_OP_EQ.
 * If P2 is zero, do not jump.Instead, push a boolean 1 (TRUE) onto the
 * stack if the jump would have been taken, or a 0 (FALSE) if not.
 */
case PH7_OP_SEQ:
case PH7_OP_SNE: {
	ph7_value *pNos = &pTos[-1];
	SyString s1,s2;
	/* Perform the comparison and act accordingly */
#ifdef UNTRUST
	if( pNos < pStack ){
		goto Abort;
	}
#endif
	/* Force a string cast */
	if((pTos->iFlags & MEMOBJ_STRING) == 0 ){
		PH7_MemObjToString(pTos);
	}
	if((pNos->iFlags & MEMOBJ_STRING) == 0 ){
		PH7_MemObjToString(pNos);
	}
	SyStringInitFromBuf(&s1,SyBlobData(&pNos->sBlob),SyBlobLength(&pNos->sBlob));
	SyStringInitFromBuf(&s2,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
	rc = SyStringCmp(&s1,&s2,SyMemcmp);
	if( pInstr->iOp == PH7_OP_NEQ ){
		rc = rc != 0;
	}else{
		rc = rc == 0;
	}
	VmPopOperand(&pTos,1);
	if( !pInstr->iP2 ){
		/* Push comparison result without taking the jump */
		PH7_MemObjRelease(pTos);
		pTos->x.iVal = rc;
		/* Invalidate any prior representation */
		MemObjSetType(pTos,MEMOBJ_BOOL);
	}else{
		if( rc ){
			/* Jump to the desired location */
			pc = pInstr->iP2 - 1;
			VmPopOperand(&pTos,1);
		}
	}
	break;
				 }
/*
 * OP_LOAD_REF * * *
 * Push the index of a referenced object on the stack.
 */
case PH7_OP_LOAD_REF: {
	sxu32 nIdx;
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Extract memory object index */
	nIdx = pTos->nIdx;
	if( nIdx != SXU32_HIGH /* Not a constant */ ){
		/* Nullify the object */
		PH7_MemObjRelease(pTos);
		/* Mark as constant and store the index on the top of the stack */
		pTos->x.iVal = (sxi64)nIdx;
		pTos->nIdx = SXU32_HIGH;
		pTos->iFlags = MEMOBJ_INT|MEMOBJ_REFERENCE;
	}
	break;
					  }
/*
 * OP_STORE_REF * * P3
 * Perform an assignment operation by reference.
 */
case PH7_OP_STORE_REF: {
	SyString sName = { 0 , 0 };
	SyHashEntry *pEntry;
	sxu32 nIdx;
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( pInstr->p3 == 0 ){
		char *zName;
		/* Take the variable name from the Next on the stack */
		if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(pTos);
		}
		if( SyBlobLength(&pTos->sBlob) > 0 ){
			zName = SyMemBackendStrDup(&pVm->sAllocator,
				(const char *)SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
			if( zName ){
				SyStringInitFromBuf(&sName,zName,SyBlobLength(&pTos->sBlob));
			}
		}
		PH7_MemObjRelease(pTos);
		pTos--;
	}else{
		SyStringInitFromBuf(&sName,pInstr->p3,SyStrlen((const char *)pInstr->p3));
	}
	nIdx = pTos->nIdx;
	if(nIdx == SXU32_HIGH ){
		if( (pTos->iFlags & (MEMOBJ_OBJ|MEMOBJ_HASHMAP|MEMOBJ_RES)) == 0 ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,
				"Reference operator require a variable not a constant as it's right operand");
		}else{
			ph7_value *pObj;
			/* Extract the desired variable and if not available dynamically create it */
			pObj = VmExtractMemObj(&(*pVm),&sName,FALSE,TRUE);
			if( pObj == 0 ){
				VmErrorFormat(&(*pVm),PH7_CTX_ERR,
					"Fatal, PH7 engine is running out of memory while loading variable '%z'",&sName);
				goto Abort;
			}
			/* Perform the store operation */
			PH7_MemObjStore(pTos,pObj);
			pTos->nIdx = pObj->nIdx;
		}
	}else if( sName.nByte > 0){
		if( (pTos->iFlags & MEMOBJ_HASHMAP) && (pVm->pGlobal == (ph7_hashmap *)pTos->x.pOther) ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"$GLOBALS is a read-only array and therefore cannot be referenced");
		}else{
			VmFrame *pFrame = pVm->pFrame;
			while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
				/* Safely ignore the exception frame */
				pFrame = pFrame->pParent;
			}
			/* Query the local frame */
			pEntry = SyHashGet(&pFrame->hVar,(const void *)sName.zString,sName.nByte);
			if( pEntry ){
				VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Referenced variable name '%z' already exists",&sName);
			}else{
				rc = SyHashInsert(&pFrame->hVar,(const void *)sName.zString,sName.nByte,SX_INT_TO_PTR(nIdx));
				if( pFrame->pParent == 0 ){
					/* Insert in the $GLOBALS array */
					VmHashmapRefInsert(pVm->pGlobal,sName.zString,sName.nByte,nIdx);
				}
				if( rc == SXRET_OK ){
					PH7_VmRefObjInstall(&(*pVm),nIdx,SyHashLastEntry(&pFrame->hVar),0,0);
				}
			}
		}
	}
	break;
				 }
/*
 * OP_UPLINK P1 * *
 * Link a variable to the top active VM frame. 
 * This is used to implement the 'global' PHP construct.
 */
case PH7_OP_UPLINK: {
	if( pVm->pFrame->pParent ){
		ph7_value *pLink = &pTos[-pInstr->iP1+1];
		SyString sName;
		/* Perform the link */
		while( pLink <= pTos ){
			if((pLink->iFlags & MEMOBJ_STRING) == 0 ){
				/* Force a string cast */
				PH7_MemObjToString(pLink);
			}
			SyStringInitFromBuf(&sName,SyBlobData(&pLink->sBlob),SyBlobLength(&pLink->sBlob));
			if( sName.nByte > 0 ){
				VmFrameLink(&(*pVm),&sName);
			}
			pLink++;
		}
	}
	VmPopOperand(&pTos,pInstr->iP1);
	break;
					}
/*
 * OP_LOAD_EXCEPTION * P2 P3
 * Push an exception in the corresponding container so that
 * it can be thrown later by the OP_THROW instruction.
 */
case PH7_OP_LOAD_EXCEPTION: {
	ph7_exception *pException = (ph7_exception *)pInstr->p3;
	VmFrame *pFrame;
	SySetPut(&pVm->aException,(const void *)&pException);
	/* Create the exception frame */
	rc = VmEnterFrame(&(*pVm),0,0,&pFrame);
	if( rc != SXRET_OK ){
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Fatal PH7 engine is runnig out of memory");
		goto Abort;
	}
	/* Mark the special frame */
	pFrame->iFlags |= VM_FRAME_EXCEPTION;
	pFrame->iExceptionJump = pInstr->iP2;
	/* Point to the frame that trigger the exception */
	pFrame = pFrame->pParent;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		pFrame = pFrame->pParent;
	}
	pException->pFrame = pFrame;
	break;
							}
/*
 * OP_POP_EXCEPTION * * P3
 * Pop a previously pushed exception from the corresponding container.
 */
case PH7_OP_POP_EXCEPTION: {
	ph7_exception *pException = (ph7_exception *)pInstr->p3;
	if( SySetUsed(&pVm->aException) > 0 ){
		ph7_exception **apException;
		/* Pop the loaded exception */
		apException = (ph7_exception **)SySetBasePtr(&pVm->aException);
		if( pException == apException[SySetUsed(&pVm->aException) - 1] ){
			(void)SySetPop(&pVm->aException);
		}
	}
	pException->pFrame = 0;
	/* Leave the exception frame */
	VmLeaveFrame(&(*pVm));
	break;
							}

/*
 * OP_THROW * P2 *
 * Throw an user exception.
 */
case PH7_OP_THROW: {
	VmFrame *pFrame = pVm->pFrame;
	sxu32 nJump = pInstr->iP2;
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	/* Tell the upper layer that an exception was thrown */
	pFrame->iFlags |= VM_FRAME_THROW;
	if( pTos->iFlags & MEMOBJ_OBJ ){
		ph7_class_instance *pThis = (ph7_class_instance *)pTos->x.pOther;
		ph7_class *pException;
		/* Make sure the loaded object is an instance of the 'Exception' base class.
		 */
		pException = PH7_VmExtractClass(&(*pVm),"Exception",sizeof("Exception")-1,TRUE,0);
		if( pException == 0 || !VmInstanceOf(pThis->pClass,pException) ){
			/* Exceptions must be valid objects derived from the Exception base class */
			rc = VmUncaughtException(&(*pVm),pThis);
			if( rc == SXERR_ABORT ){
				/* Abort processing immediately */
				goto Abort;
			}
		}else{
			/* Throw the exception */
			rc = VmThrowException(&(*pVm),pThis);
			if( rc == SXERR_ABORT ){
				/* Abort processing immediately */
				goto Abort;
			}
		}
	}else{
		/* Expecting a class instance */
		VmUncaughtException(&(*pVm),0);
		if( rc == SXERR_ABORT ){
			/* Abort processing immediately */
			goto Abort;
		}
	}
	/* Pop the top entry */
	VmPopOperand(&pTos,1);
	/* Perform an unconditional jump */
	pc = nJump - 1;
	break;
				   }
/*
 * OP_FOREACH_INIT * P2 P3
 * Prepare a foreach step.
 */
case PH7_OP_FOREACH_INIT: {
	ph7_foreach_info *pInfo = (ph7_foreach_info *)pInstr->p3;
	void *pName;
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	if( SyStringLength(&pInfo->sValue) < 1 ){
		/* Take the variable name from the top of the stack */
		if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(pTos);
		}
		/* Duplicate name */
		if( SyBlobLength(&pTos->sBlob) > 0 ){
			pName = SyMemBackendDup(&pVm->sAllocator,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
			SyStringInitFromBuf(&pInfo->sValue,pName,SyBlobLength(&pTos->sBlob));
		}
		VmPopOperand(&pTos,1);
	}
	if( (pInfo->iFlags & PH7_4EACH_STEP_KEY) && SyStringLength(&pInfo->sKey) < 1 ){
		if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(pTos);
		}
		/* Duplicate name */
		if( SyBlobLength(&pTos->sBlob) > 0 ){
			pName = SyMemBackendDup(&pVm->sAllocator,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
			SyStringInitFromBuf(&pInfo->sKey,pName,SyBlobLength(&pTos->sBlob));
		}
		VmPopOperand(&pTos,1);
	}
	/* Make sure we are dealing with a hashmap aka 'array' or an object */
	if( (pTos->iFlags & (MEMOBJ_HASHMAP|MEMOBJ_OBJ)) == 0 || SyStringLength(&pInfo->sValue) < 1 ){
		/* Jump out of the loop */
		if( (pTos->iFlags & MEMOBJ_NULL) == 0 ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_WARNING,"Invalid argument supplied for the foreach statement,expecting array or class instance");
		}
		pc = pInstr->iP2 - 1;
	}else{
		ph7_foreach_step *pStep;
		pStep = (ph7_foreach_step *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_foreach_step));
		if( pStep == 0 ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"PH7 is running out of memory while preparing the 'foreach' step");
			/* Jump out of the loop */
			pc = pInstr->iP2 - 1;
		}else{
			/* Zero the structure */
			SyZero(pStep,sizeof(ph7_foreach_step));
			/* Prepare the step */
			pStep->iFlags = pInfo->iFlags;
			if( pTos->iFlags & MEMOBJ_HASHMAP ){
				ph7_hashmap *pMap = (ph7_hashmap *)pTos->x.pOther;
				/* Reset the internal loop cursor */
				PH7_HashmapResetLoopCursor(pMap);
				/* Mark the step */
				pStep->iFlags |= PH7_4EACH_STEP_HASHMAP;
				pStep->xIter.pMap = pMap;
				pMap->iRef++;
			}else{
				ph7_class_instance *pThis = (ph7_class_instance *)pTos->x.pOther;
				/* Reset the loop cursor */
				SyHashResetLoopCursor(&pThis->hAttr);
				/* Mark the step */
				pStep->iFlags |= PH7_4EACH_STEP_OBJECT;
				pStep->xIter.pThis = pThis;
				pThis->iRef++;
			}
		}
		if( SXRET_OK != SySetPut(&pInfo->aStep,(const void *)&pStep) ){
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"PH7 is running out of memory while preparing the 'foreach' step");
			SyMemBackendPoolFree(&pVm->sAllocator,pStep);
			/* Jump out of the loop */
			pc = pInstr->iP2 - 1;
		}
	}
	VmPopOperand(&pTos,1);
	break;
						  }
/*
 * OP_FOREACH_STEP * P2 P3
 * Perform a foreach step. Jump to P2 at the end of the step.
 */
case PH7_OP_FOREACH_STEP: {
	ph7_foreach_info *pInfo = (ph7_foreach_info *)pInstr->p3;
	ph7_foreach_step **apStep,*pStep;
	ph7_value *pValue;
	VmFrame *pFrame;
	/* Peek the last step */
	apStep = (ph7_foreach_step **)SySetBasePtr(&pInfo->aStep);
	pStep = apStep[SySetUsed(&pInfo->aStep) - 1];
	pFrame = pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	if( pStep->iFlags & PH7_4EACH_STEP_HASHMAP ){
		ph7_hashmap *pMap = pStep->xIter.pMap;
		ph7_hashmap_node *pNode;
		/* Extract the current node value */
		pNode = PH7_HashmapGetNextEntry(pMap);
		if( pNode == 0 ){
			/* No more entry to process */
			pc = pInstr->iP2 - 1; /* Jump to this destination */
			if( pStep->iFlags & PH7_4EACH_STEP_REF ){
				/* Break the reference with the last element */
				SyHashDeleteEntry(&pFrame->hVar,SyStringData(&pInfo->sValue),SyStringLength(&pInfo->sValue),0);
			}
			/* Automatically reset the loop cursor */
			PH7_HashmapResetLoopCursor(pMap);
			/* Cleanup the mess left behind */
			SyMemBackendPoolFree(&pVm->sAllocator,pStep);
			SySetPop(&pInfo->aStep);
			PH7_HashmapUnref(pMap);
		}else{
			if( (pStep->iFlags & PH7_4EACH_STEP_KEY) && SyStringLength(&pInfo->sKey) > 0 ){
				ph7_value *pKey = VmExtractMemObj(&(*pVm),&pInfo->sKey,FALSE,TRUE);
				if( pKey ){
					PH7_HashmapExtractNodeKey(pNode,pKey);
				}
			}
			if( pStep->iFlags & PH7_4EACH_STEP_REF ){
				SyHashEntry *pEntry;
				/* Pass by reference */
				pEntry = SyHashGet(&pFrame->hVar,SyStringData(&pInfo->sValue),SyStringLength(&pInfo->sValue));
				if( pEntry ){
					pEntry->pUserData = SX_INT_TO_PTR(pNode->nValIdx);
				}else{
					SyHashInsert(&pFrame->hVar,SyStringData(&pInfo->sValue),SyStringLength(&pInfo->sValue),
						SX_INT_TO_PTR(pNode->nValIdx));
				}
			}else{
				/* Make a copy of the entry value */
				pValue = VmExtractMemObj(&(*pVm),&pInfo->sValue,FALSE,TRUE);
				if( pValue ){
					PH7_HashmapExtractNodeValue(pNode,pValue,TRUE);
				}
			}
		}
	}else{
		ph7_class_instance *pThis = pStep->xIter.pThis;
		VmClassAttr *pVmAttr = 0; /* Stupid cc -06 warning */
		SyHashEntry *pEntry;
		/* Point to the next attribute */
		while((pEntry = SyHashGetNextEntry(&pThis->hAttr)) != 0 ){
			pVmAttr = (VmClassAttr *)pEntry->pUserData;
			/* Check access permission */
			if( VmClassMemberAccess(&(*pVm),pThis->pClass,&pVmAttr->pAttr->sName,
				pVmAttr->pAttr->iProtection,FALSE) ){
					break; /* Access is granted */
			}
		}
		if( pEntry == 0 ){
			/* Clean up the mess left behind */
			pc = pInstr->iP2 - 1; /* Jump to this destination */
			if( pStep->iFlags & PH7_4EACH_STEP_REF ){
				/* Break the reference with the last element */
				SyHashDeleteEntry(&pFrame->hVar,SyStringData(&pInfo->sValue),SyStringLength(&pInfo->sValue),0);
			}
			SyMemBackendPoolFree(&pVm->sAllocator,pStep);
			SySetPop(&pInfo->aStep);
			PH7_ClassInstanceUnref(pThis);
		}else{
			SyString *pAttrName = &pVmAttr->pAttr->sName;
			ph7_value *pAttrValue;
			if( (pStep->iFlags & PH7_4EACH_STEP_KEY) && SyStringLength(&pInfo->sKey) > 0){
				/* Fill with the current attribute name */
				ph7_value *pKey = VmExtractMemObj(&(*pVm),&pInfo->sKey,FALSE,TRUE);
				if( pKey ){
					SyBlobReset(&pKey->sBlob);
					SyBlobAppend(&pKey->sBlob,pAttrName->zString,pAttrName->nByte);
					MemObjSetType(pKey,MEMOBJ_STRING);
				}
			}
			/* Extract attribute value */
			pAttrValue = PH7_ClassInstanceExtractAttrValue(pThis,pVmAttr);
			if( pAttrValue ){
				if( pStep->iFlags & PH7_4EACH_STEP_REF ){
					/* Pass by reference */
					pEntry = SyHashGet(&pFrame->hVar,SyStringData(&pInfo->sValue),SyStringLength(&pInfo->sValue));
					if( pEntry ){
						pEntry->pUserData = SX_INT_TO_PTR(pVmAttr->nIdx);
					}else{
						SyHashInsert(&pFrame->hVar,SyStringData(&pInfo->sValue),SyStringLength(&pInfo->sValue),
							SX_INT_TO_PTR(pVmAttr->nIdx));
					} 
				}else{
					/* Make a copy of the attribute value */
					pValue = VmExtractMemObj(&(*pVm),&pInfo->sValue,FALSE,TRUE);
					if( pValue ){
						PH7_MemObjStore(pAttrValue,pValue);
					}
				}
			}
		}
	}
	break;
						  }
/*
 * OP_MEMBER P1 P2
 * Load class attribute/method on the stack.
 */
case PH7_OP_MEMBER: {
	ph7_class_instance *pThis;
	ph7_value *pNos;
	SyString sName;
	if( !pInstr->iP1 ){
		pNos = &pTos[-1];
#ifdef UNTRUST
		if( pNos < pStack ){
			goto Abort;
		}
#endif
		if( pNos->iFlags & MEMOBJ_OBJ ){
			ph7_class *pClass;
			/* Class already instantiated */
			pThis = (ph7_class_instance *)pNos->x.pOther;
			/* Point to the instantiated class */
			pClass = pThis->pClass;
			/* Extract attribute name first */
			SyStringInitFromBuf(&sName,(const char *)SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
			if( pInstr->iP2 ){
				/* Method call */
				ph7_class_method *pMeth = 0;
				if( sName.nByte > 0 ){
					/* Extract the target method */
					pMeth = PH7_ClassExtractMethod(pClass,sName.zString,sName.nByte);
				}
				if( pMeth == 0 ){
					VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Undefined class method '%z->%z',PH7 is loading NULL",
						&pClass->sName,&sName
						);
					/* Call the '__Call()' magic method if available */
					PH7_ClassInstanceCallMagicMethod(&(*pVm),pClass,pThis,"__call",sizeof("__call")-1,&sName);
					/* Pop the method name from the stack */
					VmPopOperand(&pTos,1);
					PH7_MemObjRelease(pTos);
				}else{
					/* Push method name on the stack */
					PH7_MemObjRelease(pTos);
					SyBlobAppend(&pTos->sBlob,SyStringData(&pMeth->sVmName),SyStringLength(&pMeth->sVmName));
					MemObjSetType(pTos,MEMOBJ_STRING);
				}
				pTos->nIdx = SXU32_HIGH;
			}else{
				/* Attribute access */
				VmClassAttr *pObjAttr = 0;
				SyHashEntry *pEntry;
				/* Extract the target attribute */
				if( sName.nByte > 0 ){
					pEntry = SyHashGet(&pThis->hAttr,(const void *)sName.zString,sName.nByte);
					if( pEntry ){
						/* Point to the attribute value */
						pObjAttr = (VmClassAttr *)pEntry->pUserData;
					}
				}
				if( pObjAttr == 0 ){
					/* No such attribute,load null */
					VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Undefined class attribute '%z->%z',PH7 is loading NULL",
						&pClass->sName,&sName);
					/* Call the __get magic method if available */
					PH7_ClassInstanceCallMagicMethod(&(*pVm),pClass,pThis,"__get",sizeof("__get")-1,&sName);
				}
				VmPopOperand(&pTos,1); 
				/* TICKET 1433-49: Deffer garbage collection until attribute loading.
				 * This is due to the following case:
				 *     (new TestClass())->foo;
				 */
				pThis->iRef++;
				PH7_MemObjRelease(pTos);
				pTos->nIdx = SXU32_HIGH; /* Assume we are loading a constant */
				if( pObjAttr ){
					ph7_value *pValue = 0; /* cc warning */
					/* Check attribute access */
					if( VmClassMemberAccess(&(*pVm),pClass,&pObjAttr->pAttr->sName,pObjAttr->pAttr->iProtection,TRUE) ){
						/* Load attribute */
						pValue = (ph7_value *)SySetAt(&pVm->aMemObj,pObjAttr->nIdx);
						if( pValue ){
							if( pThis->iRef < 2 ){
								/* Perform a store operation,rather than a load operation since
								 * the class instance '$this' will be deleted shortly.
								 */
								PH7_MemObjStore(pValue,pTos);
							}else{
								/* Simple load */
								PH7_MemObjLoad(pValue,pTos);
							}
							if( (pObjAttr->pAttr->iFlags & PH7_CLASS_ATTR_CONSTANT) == 0 ){
								if( pThis->iRef > 1 ){
									/* Load attribute index */
									pTos->nIdx = pObjAttr->nIdx;
								}
							}
						}
					}
				}
				/* Safely unreference the object */
				PH7_ClassInstanceUnref(pThis);
			}
		}else{
			VmErrorFormat(&(*pVm),PH7_CTX_ERR,"'->': Expecting class instance as left operand,PH7 is loading NULL");
			VmPopOperand(&pTos,1);
			PH7_MemObjRelease(pTos);
			pTos->nIdx = SXU32_HIGH; /* Assume we are loading a constant */
		}
	}else{
		/* Static member access using class name */
		pNos = pTos;
		pThis = 0;
		if( !pInstr->p3 ){
			SyStringInitFromBuf(&sName,(const char *)SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
			pNos--;
#ifdef UNTRUST
			if( pNos < pStack ){
				goto Abort;
			}
#endif
		}else{
			/* Attribute name already computed */
			SyStringInitFromBuf(&sName,pInstr->p3,SyStrlen((const char *)pInstr->p3));
		}
		if( pNos->iFlags & (MEMOBJ_STRING|MEMOBJ_OBJ) ){
			ph7_class *pClass = 0;	
			if( pNos->iFlags & MEMOBJ_OBJ ){
				/* Class already instantiated */
				pThis = (ph7_class_instance *)pNos->x.pOther;
				pClass = pThis->pClass;
				pThis->iRef++; /* Deffer garbage collection */
			}else{
				/* Try to extract the target class */
				if( SyBlobLength(&pNos->sBlob) > 0 ){
					pClass = PH7_VmExtractClass(&(*pVm),(const char *)SyBlobData(&pNos->sBlob),
						SyBlobLength(&pNos->sBlob),FALSE,0);
				}
			}
			if( pClass == 0 ){
				/* Undefined class */
				VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Call to undefined class '%.*s',PH7 is loading NULL",
					SyBlobLength(&pNos->sBlob),(const char *)SyBlobData(&pNos->sBlob)
					);
				if( !pInstr->p3 ){
					VmPopOperand(&pTos,1);
				}
				PH7_MemObjRelease(pTos);
				pTos->nIdx = SXU32_HIGH;
			}else{	
				if( pInstr->iP2 ){
					/* Method call */
					ph7_class_method *pMeth = 0;
					if( sName.nByte > 0 && (pClass->iFlags & PH7_CLASS_INTERFACE) == 0){
						/* Extract the target method */
						pMeth = PH7_ClassExtractMethod(pClass,sName.zString,sName.nByte);
					}
					if( pMeth == 0 || (pMeth->iFlags & PH7_CLASS_ATTR_ABSTRACT) ){
						if( pMeth ){
							VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Cannot call abstract method '%z:%z',PH7 is loading NULL",
								&pClass->sName,&sName
								);
						}else{
							VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Undefined class static method '%z::%z',PH7 is loading NULL",
								&pClass->sName,&sName
								);
							/* Call the '__CallStatic()' magic method if available */
							PH7_ClassInstanceCallMagicMethod(&(*pVm),pClass,0,"__callStatic",sizeof("__callStatic")-1,&sName);
						}
						/* Pop the method name from the stack */
						if( !pInstr->p3 ){
							VmPopOperand(&pTos,1);
						}
						PH7_MemObjRelease(pTos);
					}else{
						/* Push method name on the stack */
						PH7_MemObjRelease(pTos);
						SyBlobAppend(&pTos->sBlob,SyStringData(&pMeth->sVmName),SyStringLength(&pMeth->sVmName));
						MemObjSetType(pTos,MEMOBJ_STRING);
					}
					pTos->nIdx = SXU32_HIGH;
				}else{
					/* Attribute access */
					ph7_class_attr *pAttr = 0;
					/* Extract the target attribute */
					if( sName.nByte > 0 ){
						pAttr = PH7_ClassExtractAttribute(pClass,sName.zString,sName.nByte);
					}
					if( pAttr == 0 ){
						/* No such attribute,load null */
						VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Undefined class attribute '%z::%z',PH7 is loading NULL",
							&pClass->sName,&sName);
						/* Call the __get magic method if available */
						PH7_ClassInstanceCallMagicMethod(&(*pVm),pClass,0,"__get",sizeof("__get")-1,&sName);
					}
					/* Pop the attribute name from the stack */
					if( !pInstr->p3 ){
						VmPopOperand(&pTos,1);
					}
					PH7_MemObjRelease(pTos);
					pTos->nIdx = SXU32_HIGH;
					if( pAttr ){
						if( (pAttr->iFlags & (PH7_CLASS_ATTR_STATIC|PH7_CLASS_ATTR_CONSTANT)) == 0 ){
							/* Access to a non static attribute */
							VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Access to a non-static class attribute '%z::%z',PH7 is loading NULL",
								&pClass->sName,&pAttr->sName
								);
						}else{
							ph7_value *pValue;
							/* Check if the access to the attribute is allowed */
							if( VmClassMemberAccess(&(*pVm),pClass,&pAttr->sName,pAttr->iProtection,TRUE) ){
								/* Load the desired attribute */
								pValue = (ph7_value *)SySetAt(&pVm->aMemObj,pAttr->nIdx);
								if( pValue ){
									PH7_MemObjLoad(pValue,pTos);
									if( pAttr->iFlags & PH7_CLASS_ATTR_STATIC ){
										/* Load index number */
										pTos->nIdx = pAttr->nIdx;
									}
								}
							}
						}
					}
				}
				if( pThis ){
					/* Safely unreference the object */
					PH7_ClassInstanceUnref(pThis);
				}
			}
		}else{
			/* Pop operands */
			PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,"Invalid class name,PH7 is loading NULL");
			if( !pInstr->p3 ){
				VmPopOperand(&pTos,1);
			}
			PH7_MemObjRelease(pTos);
			pTos->nIdx = SXU32_HIGH;
		}
	}
	break;
					}
/*
 * OP_NEW P1 * * *
 *  Create a new class instance (Object in the PHP jargon) and push that object on the stack.
 */
case PH7_OP_NEW: {
	ph7_value *pArg = &pTos[-pInstr->iP1]; /* Constructor arguments (if available) */
	ph7_class *pClass = 0;
	ph7_class_instance *pNew;
	if( (pTos->iFlags & MEMOBJ_STRING) && SyBlobLength(&pTos->sBlob) > 0 ){
		/* Try to extract the desired class */
		pClass = PH7_VmExtractClass(&(*pVm),(const char *)SyBlobData(&pTos->sBlob),
			SyBlobLength(&pTos->sBlob),TRUE /* Only loadable class but not 'interface' or 'abstract' class*/,0);
	}else if( pTos->iFlags & MEMOBJ_OBJ ){
		/* Take the base class from the loaded instance */
		pClass = ((ph7_class_instance *)pTos->x.pOther)->pClass;
	}
	if( pClass == 0 ){
		/* No such class */
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,"Class '%.*s' is not defined,PH7 is loading NULL",
			SyBlobLength(&pTos->sBlob),(const char *)SyBlobData(&pTos->sBlob)
			);
		PH7_MemObjRelease(pTos);
		if( pInstr->iP1 > 0 ){
			/* Pop given arguments */
			VmPopOperand(&pTos,pInstr->iP1);
		}
	}else{
		ph7_class_method *pCons;
		/* Create a new class instance */
		pNew = PH7_NewClassInstance(&(*pVm),pClass);
		if( pNew == 0 ){
			VmErrorFormat(&(*pVm),PH7_CTX_ERR,
				"Cannot create new class '%z' instance due to a memory failure,PH7 is loading NULL",
				&pClass->sName
			);
			PH7_MemObjRelease(pTos);
			if( pInstr->iP1 > 0 ){
				/* Pop given arguments */
				VmPopOperand(&pTos,pInstr->iP1);
			}
			break;
		}
		/* Check if a constructor is available */
		pCons = PH7_ClassExtractMethod(pClass,"__construct",sizeof("__construct")-1);
		if( pCons == 0 ){
			SyString *pName = &pClass->sName;
			/* Check for a constructor with the same base class name */
			pCons = PH7_ClassExtractMethod(pClass,pName->zString,pName->nByte);
		}
		if( pCons ){
			/* Call the class constructor */
			SySetReset(&aArg);
			while( pArg < pTos ){
				SySetPut(&aArg,(const void *)&pArg);
				pArg++;
			}
			if( pVm->bErrReport ){
				ph7_vm_func_arg *pFuncArg;
				sxu32 n;
				n = SySetUsed(&aArg);
				/* Emit a notice for missing arguments */
				while( n < SySetUsed(&pCons->sFunc.aArgs) ){
					pFuncArg = (ph7_vm_func_arg *)SySetAt(&pCons->sFunc.aArgs,n);
					if( pFuncArg ){
						if( SySetUsed(&pFuncArg->aByteCode) < 1 ){
							VmErrorFormat(&(*pVm),PH7_CTX_NOTICE,"Missing constructor argument %u($%z) for class '%z'",
								n+1,&pFuncArg->sName,&pClass->sName);
						}
					}
					n++;
				}
			}
			PH7_VmCallClassMethod(&(*pVm),pNew,pCons,0,(int)SySetUsed(&aArg),(ph7_value **)SySetBasePtr(&aArg));
			/* TICKET 1433-52: Unsetting $this in the constructor body */
			if( pNew->iRef < 1 ){
				pNew->iRef = 1; 
			}
		}
		if( pInstr->iP1 > 0 ){
			/* Pop given arguments */
			VmPopOperand(&pTos,pInstr->iP1);
		}
		PH7_MemObjRelease(pTos);
		pTos->x.pOther = pNew;
		MemObjSetType(pTos,MEMOBJ_OBJ);
	}
	break;
				 }
/*
 * OP_CLONE * * *
 * Perfome a clone operation.
 */
case PH7_OP_CLONE: {
	ph7_class_instance *pSrc,*pClone;
#ifdef UNTRUST
	if( pTos < pStack ){
		goto Abort;
	}
#endif
	/* Make sure we are dealing with a class instance */
	if( (pTos->iFlags & MEMOBJ_OBJ) == 0 ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,
			"Clone: Expecting a class instance as left operand,PH7 is loading NULL");
		PH7_MemObjRelease(pTos);
		break;
	}
	/* Point to the source */
	pSrc = (ph7_class_instance *)pTos->x.pOther;
	/* Perform the clone operation */
	pClone = PH7_CloneClassInstance(pSrc);
	PH7_MemObjRelease(pTos);
	if( pClone == 0 ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,
			"Clone: cannot make an object clone due to a memory failure,PH7 is loading NULL");
	}else{
		/* Load the cloned object */
		pTos->x.pOther = pClone;
		MemObjSetType(pTos,MEMOBJ_OBJ);
	}
	break;
				   }
/*
 * OP_SWITCH * * P3
 *  This is the bytecode implementation of the complex switch() PHP construct.
 */
case PH7_OP_SWITCH: {
	ph7_switch *pSwitch = (ph7_switch *)pInstr->p3;
	ph7_case_expr *aCase,*pCase;
	ph7_value sValue,sCaseValue; 
	sxu32 n,nEntry;
#ifdef UNTRUST
	if( pSwitch == 0 || pTos < pStack ){
		goto Abort;
	}
#endif
	/* Point to the case table  */
	aCase = (ph7_case_expr *)SySetBasePtr(&pSwitch->aCaseExpr);
	nEntry = SySetUsed(&pSwitch->aCaseExpr);
	/* Select the appropriate case block to execute */
	PH7_MemObjInit(pVm,&sValue);
	PH7_MemObjInit(pVm,&sCaseValue);
	for( n = 0 ; n < nEntry ; ++n ){
		pCase = &aCase[n];
		PH7_MemObjLoad(pTos,&sValue);
		/* Execute the case expression first */
		VmLocalExec(pVm,&pCase->aByteCode,&sCaseValue);
		/* Compare the two expression */
		rc = PH7_MemObjCmp(&sValue,&sCaseValue,FALSE,0);
		PH7_MemObjRelease(&sValue);
		PH7_MemObjRelease(&sCaseValue);
		if( rc == 0 ){
			/* Value match,jump to this block */
			pc = pCase->nStart - 1;
			break;
		}
	}
	VmPopOperand(&pTos,1);
	if( n >= nEntry ){
		/* No approprite case to execute,jump to the default case */
		if( pSwitch->nDefault > 0 ){
			pc = pSwitch->nDefault - 1;
		}else{
			/* No default case,jump out of this switch */
			pc = pSwitch->nOut - 1;
		}
	}
	break;
					}
/*
 * OP_CALL P1 * *
 *  Call a PHP or a foreign function and push the return value of the called
 *  function on the stack.
 */
case PH7_OP_CALL: {
	ph7_value *pArg = &pTos[-pInstr->iP1];
	SyHashEntry *pEntry;
	SyString sName;
	/* Extract function name */
	if( (pTos->iFlags & MEMOBJ_STRING) == 0 ){
		if( pTos->iFlags & MEMOBJ_HASHMAP ){
			ph7_value sResult;
			SySetReset(&aArg);
			while( pArg < pTos ){
				SySetPut(&aArg,(const void *)&pArg);
				pArg++;
			}
			PH7_MemObjInit(pVm,&sResult);
			/* May be a class instance and it's static method */
			PH7_VmCallUserFunction(pVm,pTos,(int)SySetUsed(&aArg),(ph7_value **)SySetBasePtr(&aArg),&sResult);
			SySetReset(&aArg);
			/* Pop given arguments */
			if( pInstr->iP1 > 0 ){
				VmPopOperand(&pTos,pInstr->iP1);
			}
			/* Copy result */
			PH7_MemObjStore(&sResult,pTos);
			PH7_MemObjRelease(&sResult);
		}else{	
			if( pTos->iFlags & MEMOBJ_OBJ ){
				ph7_class_instance *pThis = (ph7_class_instance *)pTos->x.pOther;
				/* Call the magic method '__invoke' if available */
				PH7_ClassInstanceCallMagicMethod(&(*pVm),pThis->pClass,pThis,"__invoke",sizeof("__invoke")-1,0);
			}else{
				/* Raise exception: Invalid function name */
				VmErrorFormat(&(*pVm),PH7_CTX_WARNING,"Invalid function name,NULL will be returned");
			}
			/* Pop given arguments */
			if( pInstr->iP1 > 0 ){
				VmPopOperand(&pTos,pInstr->iP1);
			}
			/* Assume a null return value so that the program continue it's execution normally */
			PH7_MemObjRelease(pTos);
		}
		break;
	}
	SyStringInitFromBuf(&sName,SyBlobData(&pTos->sBlob),SyBlobLength(&pTos->sBlob));
	/* Check for a compiled function first */
	pEntry = SyHashGet(&pVm->hFunction,(const void *)sName.zString,sName.nByte);
	if( pEntry ){
		ph7_vm_func_arg *aFormalArg;
		ph7_class_instance *pThis;
		ph7_value *pFrameStack;
		ph7_vm_func *pVmFunc;
		ph7_class *pSelf;
		VmFrame *pFrame;
		ph7_value *pObj;
		VmSlot sArg;
		sxu32 n;
		/* initialize fields */
		pVmFunc = (ph7_vm_func *)pEntry->pUserData;
		pThis = 0;
		pSelf = 0;
		if( pVmFunc->iFlags & VM_FUNC_CLASS_METHOD ){
			ph7_class_method *pMeth;
			/* Class method call */
			ph7_value *pTarget = &pTos[-1];
			if( pTarget >= pStack && (pTarget->iFlags & (MEMOBJ_STRING|MEMOBJ_OBJ|MEMOBJ_NULL)) ){
				/* Extract the 'this' pointer */
				if(pTarget->iFlags & MEMOBJ_OBJ ){
					/* Instance already loaded */
					pThis = (ph7_class_instance *)pTarget->x.pOther;
					pThis->iRef++;
					pSelf = pThis->pClass;
				}
				if( pSelf == 0 ){
					if( (pTarget->iFlags & MEMOBJ_STRING) && SyBlobLength(&pTarget->sBlob) > 0 ){
						/* "Late Static Binding" class name */
						pSelf = PH7_VmExtractClass(&(*pVm),(const char *)SyBlobData(&pTarget->sBlob),
							SyBlobLength(&pTarget->sBlob),FALSE,0);
					}
					if( pSelf == 0 ){
						pSelf = (ph7_class *)pVmFunc->pUserData;
					}
				}
				if( pThis == 0  ){
					VmFrame *pFrame = pVm->pFrame;
					while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
						/* Safely ignore the exception frame */
						pFrame = pFrame->pParent;
					}
					if( pFrame->pParent ){
						/* TICKET-1433-52: Make sure the '$this' variable is available to the current scope */
						pThis = pFrame->pThis;
						if( pThis ){
							pThis->iRef++;
						}
					}
				}
				VmPopOperand(&pTos,1);
				PH7_MemObjRelease(pTos);
				/* Synchronize pointers */
				pArg = &pTos[-pInstr->iP1];
				/* TICKET 1433-50: This is a very very unlikely scenario that occurs when the 'genius'
				 * user have already computed the random generated unique class method name 
				 * and tries to call it outside it's context [i.e: global scope]. In that 
				 * case we have to synchronize pointers to avoid stack underflow.
				 */
				while( pArg < pStack ){
					pArg++;
				}
				if( pSelf ){ /* Paranoid edition */
					/* Check if the call is allowed */
					pMeth = PH7_ClassExtractMethod(pSelf,pVmFunc->sName.zString,pVmFunc->sName.nByte);
					if( pMeth && pMeth->iProtection != PH7_CLASS_PROT_PUBLIC ){
						if( !VmClassMemberAccess(&(*pVm),pSelf,&pVmFunc->sName,pMeth->iProtection,TRUE) ){
							/* Pop given arguments */
							if( pInstr->iP1 > 0 ){
								VmPopOperand(&pTos,pInstr->iP1);
							}
							/* Assume a null return value so that the program continue it's execution normally */
							PH7_MemObjRelease(pTos);
							break;
						}
					}
				}
			}
		}
		/* Check The recursion limit */
		if( pVm->nRecursionDepth > pVm->nMaxDepth ){
			VmErrorFormat(&(*pVm),PH7_CTX_ERR,
				"Recursion limit reached while invoking user function '%z',PH7 will set a NULL return value",
				&pVmFunc->sName);
			/* Pop given arguments */
			if( pInstr->iP1 > 0 ){
				VmPopOperand(&pTos,pInstr->iP1);
			}
			/* Assume a null return value so that the program continue it's execution normally */
			PH7_MemObjRelease(pTos);
			break;
		}
		if( pVmFunc->pNextName ){
			/* Function is candidate for overloading,select the appropriate function to call */
			pVmFunc = VmOverload(&(*pVm),pVmFunc,pArg,(int)(pTos-pArg));
		}
		/* Extract the formal argument set */
		aFormalArg = (ph7_vm_func_arg *)SySetBasePtr(&pVmFunc->aArgs);
		/* Create a new VM frame  */
		rc = VmEnterFrame(&(*pVm),pVmFunc,pThis,&pFrame);
		if( rc != SXRET_OK ){
			/* Raise exception: Out of memory */
			VmErrorFormat(&(*pVm),PH7_CTX_ERR,
				"PH7 is running out of memory while calling function '%z',NULL will be returned",
				&pVmFunc->sName);
			/* Pop given arguments */
			if( pInstr->iP1 > 0 ){
				VmPopOperand(&pTos,pInstr->iP1);
			}
			/* Assume a null return value so that the program continue it's execution normally */
			PH7_MemObjRelease(pTos);
			break;
		}
		if( (pVmFunc->iFlags & VM_FUNC_CLASS_METHOD) && pThis ){
			/* Install the '$this' variable */
			static const SyString sThis = { "this" , sizeof("this") - 1 };
			pObj = VmExtractMemObj(&(*pVm),&sThis,FALSE,TRUE);
			if( pObj ){
				/* Reflect the change */
				pObj->x.pOther = pThis;
				MemObjSetType(pObj,MEMOBJ_OBJ);
			}
		}
		if( SySetUsed(&pVmFunc->aStatic) > 0 ){
			ph7_vm_func_static_var *pStatic,*aStatic;
			/* Install static variables */
			aStatic = (ph7_vm_func_static_var *)SySetBasePtr(&pVmFunc->aStatic);
			for( n = 0 ; n < SySetUsed(&pVmFunc->aStatic) ; ++n ){
				pStatic = &aStatic[n];
				if( pStatic->nIdx == SXU32_HIGH ){
					/* Initialize the static variables */
					pObj = VmReserveMemObj(&(*pVm),&pStatic->nIdx);
					if( pObj ){
						/* Assume a NULL initialization value */
						PH7_MemObjInit(&(*pVm),pObj);
						if( SySetUsed(&pStatic->aByteCode) > 0 ){
							/* Evaluate initialization expression (Any complex expression) */
							VmLocalExec(&(*pVm),&pStatic->aByteCode,pObj);
						}
						pObj->nIdx = pStatic->nIdx;
					}else{
						continue;
					}
				}
				/* Install in the current frame */
				SyHashInsert(&pFrame->hVar,SyStringData(&pStatic->sName),SyStringLength(&pStatic->sName),
					SX_INT_TO_PTR(pStatic->nIdx));
			}
		}
		/* Push arguments in the local frame */
		n = 0;
		while( pArg < pTos ){
			if( n < SySetUsed(&pVmFunc->aArgs) ){
				if( (pArg->iFlags & MEMOBJ_NULL) && SySetUsed(&aFormalArg[n].aByteCode) > 0 ){
					/* NULL values are redirected to default arguments */
					rc = VmLocalExec(&(*pVm),&aFormalArg[n].aByteCode,pArg);
					if( rc == PH7_ABORT ){
						goto Abort;
					}
				}
				/* Make sure the given arguments are of the correct type */
				if( aFormalArg[n].nType > 0 ){
					if ( aFormalArg[n].nType == SXU32_HIGH ){
						/* Argument must be a class instance [i.e: object] */
						SyString *pName = &aFormalArg[n].sClass;
						ph7_class *pClass;
						/* Try to extract the desired class */
						pClass = PH7_VmExtractClass(&(*pVm),pName->zString,pName->nByte,TRUE,0);
						if( pClass ){
							if( (pArg->iFlags & MEMOBJ_OBJ) == 0 ){
								if( (pArg->iFlags & MEMOBJ_NULL) == 0 ){
									VmErrorFormat(&(*pVm),PH7_CTX_WARNING,
										"Function '%z()':Argument %u must be an object of type '%z',PH7 is loading NULL instead",
										&pVmFunc->sName,n+1,pName);
									PH7_MemObjRelease(pArg);
								}
							}else{
								ph7_class_instance *pThis = (ph7_class_instance *)pArg->x.pOther;
								/* Make sure the object is an instance of the given class */
								if( ! VmInstanceOf(pThis->pClass,pClass) ){
									VmErrorFormat(&(*pVm),PH7_CTX_ERR,
										"Function '%z()':Argument %u must be an object of type '%z',PH7 is loading NULL instead",
										&pVmFunc->sName,n+1,pName);
									PH7_MemObjRelease(pArg);
								}
							}
						}
					}else if( ((pArg->iFlags & aFormalArg[n].nType) == 0) ){
						ProcMemObjCast xCast = PH7_MemObjCastMethod(aFormalArg[n].nType);
						/* Cast to the desired type */
						xCast(pArg);
					}
				}
				if( aFormalArg[n].iFlags & VM_FUNC_ARG_BY_REF ){
					/* Pass by reference */
					if( pArg->nIdx == SXU32_HIGH ){
						/* Expecting a variable,not a constant,raise an exception */
						if((pArg->iFlags & (MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES|MEMOBJ_NULL)) == 0){
							VmErrorFormat(&(*pVm),PH7_CTX_WARNING,
								"Function '%z',%d argument: Pass by reference,expecting a variable not a "
								"constant,PH7 is switching to pass by value",&pVmFunc->sName,n+1);
						}
						/* Switch to pass by value */
						pObj = VmExtractMemObj(&(*pVm),&aFormalArg[n].sName,FALSE,TRUE);
					}else{
						SyHashEntry *pRefEntry;
						/* Install the referenced variable in the private function frame */
						pRefEntry = SyHashGet(&pFrame->hVar,SyStringData(&aFormalArg[n].sName),SyStringLength(&aFormalArg[n].sName));
						if( pRefEntry == 0 ){
							SyHashInsert(&pFrame->hVar,SyStringData(&aFormalArg[n].sName),
								SyStringLength(&aFormalArg[n].sName),SX_INT_TO_PTR(pArg->nIdx));
							sArg.nIdx = pArg->nIdx;
							sArg.pUserData = 0;
							SySetPut(&pFrame->sArg,(const void *)&sArg);
						}
						pObj = 0;
					}
				}else{
					/* Pass by value,make a copy of the given argument */
					pObj = VmExtractMemObj(&(*pVm),&aFormalArg[n].sName,FALSE,TRUE);
				}
			}else{
				char zName[32];
				SyString sName;
				/* Set a dummy name */
				sName.nByte = SyBufferFormat(zName,sizeof(zName),"[%u]apArg",n);
				sName.zString = zName;
				/* Annonymous argument */
				pObj = VmExtractMemObj(&(*pVm),&sName,TRUE,TRUE);
			}
			if( pObj ){
				PH7_MemObjStore(pArg,pObj);
				/* Insert argument index  */
				sArg.nIdx = pObj->nIdx;
				sArg.pUserData = 0;
				SySetPut(&pFrame->sArg,(const void *)&sArg);
			}
			PH7_MemObjRelease(pArg);
			pArg++;
			++n;
		}
		/* Set up closure environment */
		if( pVmFunc->iFlags & VM_FUNC_CLOSURE ){
			ph7_vm_func_closure_env *aEnv,*pEnv;
			ph7_value *pValue;
			sxu32 n;
			aEnv = (ph7_vm_func_closure_env *)SySetBasePtr(&pVmFunc->aClosureEnv);
			for(n = 0 ; n < SySetUsed(&pVmFunc->aClosureEnv) ; ++n ){
				pEnv = &aEnv[n];
				if( (pEnv->iFlags & VM_FUNC_ARG_IGNORE) && (pEnv->sValue.iFlags & MEMOBJ_NULL) ){
					/* Do not install null value */
					continue;
				}
				pValue = VmExtractMemObj(pVm,&pEnv->sName,FALSE,TRUE);
				if( pValue == 0 ){
					continue;
				}
				/* Invalidate any prior representation */
				PH7_MemObjRelease(pValue);
				/* Duplicate bound variable value */
				PH7_MemObjStore(&pEnv->sValue,pValue);
			}
		}
		/* Process default values */
		while( n < SySetUsed(&pVmFunc->aArgs) ){
			if( SySetUsed(&aFormalArg[n].aByteCode) > 0 ){
				pObj = VmExtractMemObj(&(*pVm),&aFormalArg[n].sName,FALSE,TRUE);
				if( pObj ){
					/* Evaluate the default value and extract it's result */
					rc = VmLocalExec(&(*pVm),&aFormalArg[n].aByteCode,pObj);
					if( rc == PH7_ABORT ){
						goto Abort;
					}
					/* Insert argument index */
					sArg.nIdx = pObj->nIdx;
					sArg.pUserData = 0;
					SySetPut(&pFrame->sArg,(const void *)&sArg);
					/* Make sure the default argument is of the correct type */
					if( aFormalArg[n].nType > 0 && ((pObj->iFlags & aFormalArg[n].nType) == 0) ){
						ProcMemObjCast xCast = PH7_MemObjCastMethod(aFormalArg[n].nType);
						/* Cast to the desired type */
						xCast(pObj);
					}
				}
			}
			++n;
		}
		/* Pop arguments,function name from the operand stack and assume the function 
		 * does not return anything.
		 */
		PH7_MemObjRelease(pTos);
		pTos = &pTos[-pInstr->iP1];
		/* Allocate a new operand stack and evaluate the function body */
		pFrameStack = VmNewOperandStack(&(*pVm),SySetUsed(&pVmFunc->aByteCode));
		if( pFrameStack == 0 ){
			/* Raise exception: Out of memory */
			VmErrorFormat(&(*pVm),PH7_CTX_ERR,"PH7 is running out of memory while calling function '%z',NULL will be returned",
				&pVmFunc->sName);
			if( pInstr->iP1 > 0 ){
				VmPopOperand(&pTos,pInstr->iP1);
			}
			break;
		}
		if( pSelf ){
			/* Push class name */
			SySetPut(&pVm->aSelf,(const void *)&pSelf);
		}
		/* Increment nesting level */
		pVm->nRecursionDepth++;
		/* Execute function body */
		rc = VmByteCodeExec(&(*pVm),(VmInstr *)SySetBasePtr(&pVmFunc->aByteCode),pFrameStack,-1,pTos,&n,FALSE);
		/* Decrement nesting level */
		pVm->nRecursionDepth--;
		if( pSelf ){
			/* Pop class name */
			(void)SySetPop(&pVm->aSelf);
		}
		/* Cleanup the mess left behind */
		if( (pVmFunc->iFlags & VM_FUNC_REF_RETURN) && rc == SXRET_OK ){
			/* Return by reference,reflect that */
			if( n != SXU32_HIGH ){
				VmSlot *aSlot = (VmSlot *)SySetBasePtr(&pFrame->sLocal);
				sxu32 i;
				/* Make sure the referenced object is not a local variable */
				for( i = 0 ; i < SySetUsed(&pFrame->sLocal) ; ++i ){
					if( n == aSlot[i].nIdx ){
						pObj = (ph7_value *)SySetAt(&pVm->aMemObj,n);
						if( pObj && (pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_OBJ|MEMOBJ_HASHMAP|MEMOBJ_RES)) == 0 ){
							VmErrorFormat(&(*pVm),PH7_CTX_NOTICE,
								"Function '%z',return by reference: Cannot reference local variable,PH7 is switching to return by value",
								&pVmFunc->sName);
						}
						n = SXU32_HIGH;
						break;
					}
				}
			}else{
				if( (pTos->iFlags & (MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_NULL|MEMOBJ_RES)) == 0 ){
					VmErrorFormat(&(*pVm),PH7_CTX_NOTICE,
						"Function '%z',return by reference: Cannot reference constant expression,PH7 is switching to return by value",
						&pVmFunc->sName);
				}
			}
			pTos->nIdx = n;
		}
		/* Cleanup the mess left behind */
		if( rc != PH7_ABORT && ((pFrame->iFlags & VM_FRAME_THROW) || rc == PH7_EXCEPTION) ){
			/* An exception was throw in this frame */
			pFrame = pFrame->pParent;
			if( !is_callback && pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) && pFrame->iExceptionJump > 0 ){
				/* Pop the resutlt */
				VmPopOperand(&pTos,1);
				/* Jump to this destination */
				pc = pFrame->iExceptionJump - 1;
				rc = PH7_OK;
			}else{
				if( pFrame->pParent ){
					rc = PH7_EXCEPTION;
				}else{
					/* Continue normal execution */
					rc = PH7_OK;
				}
			}
		}
		/* Free the operand stack */
		SyMemBackendFree(&pVm->sAllocator,pFrameStack);
		/* Leave the frame */
		VmLeaveFrame(&(*pVm));
		if( rc == PH7_ABORT ){
			/* Abort processing immeditaley */
			goto Abort;
		}else if( rc == PH7_EXCEPTION ){
			goto Exception;
		}
	}else{
		ph7_user_func *pFunc; 
		ph7_context sCtx;
		ph7_value sRet;
		/* Look for an installed foreign function */
		pEntry = SyHashGet(&pVm->hHostFunction,(const void *)sName.zString,sName.nByte);
		if( pEntry == 0 ){
			/* Call to undefined function */
			VmErrorFormat(&(*pVm),PH7_CTX_WARNING,"Call to undefined function '%z',NULL will be returned",&sName);
			/* Pop given arguments */
			if( pInstr->iP1 > 0 ){
				VmPopOperand(&pTos,pInstr->iP1);
			}
			/* Assume a null return value so that the program continue it's execution normally */
			PH7_MemObjRelease(pTos);
			break;
		}
		pFunc = (ph7_user_func *)pEntry->pUserData;
		/* Start collecting function arguments */
		SySetReset(&aArg);
		while( pArg < pTos ){
			SySetPut(&aArg,(const void *)&pArg);
			pArg++;
		}
		/* Assume a null return value */
		PH7_MemObjInit(&(*pVm),&sRet);
		/* Init the call context */
		VmInitCallContext(&sCtx,&(*pVm),pFunc,&sRet,0);
		/* Call the foreign function */
		rc = pFunc->xFunc(&sCtx,(int)SySetUsed(&aArg),(ph7_value **)SySetBasePtr(&aArg));
		/* Release the call context */
		VmReleaseCallContext(&sCtx);
		if( rc == PH7_ABORT ){
			goto Abort;
		}
		if( pInstr->iP1 > 0 ){
			/* Pop function name and arguments */
			VmPopOperand(&pTos,pInstr->iP1);
		}
		/* Save foreign function return value */
		PH7_MemObjStore(&sRet,pTos);
		PH7_MemObjRelease(&sRet);
	}
	break;
				  }
/*
 * OP_CONSUME: P1 * *
 * Consume (Invoke the installed VM output consumer callback) and POP P1 elements from the stack.
 */
case PH7_OP_CONSUME: {
	ph7_output_consumer *pCons = &pVm->sVmConsumer;
	ph7_value *pCur,*pOut = pTos;

	pOut = &pTos[-pInstr->iP1 + 1];
	pCur = pOut;
	/* Start the consume process  */
	while( pOut <= pTos ){
		/* Force a string cast */
		if( (pOut->iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(pOut);
		}
		if( SyBlobLength(&pOut->sBlob) > 0 ){
			/*SyBlobNullAppend(&pOut->sBlob);*/
			/* Invoke the output consumer callback */
			rc = pCons->xConsumer(SyBlobData(&pOut->sBlob),SyBlobLength(&pOut->sBlob),pCons->pUserData);
			if( pCons->xConsumer != VmObConsumer ){
				/* Increment output length */
				pVm->nOutputLen += SyBlobLength(&pOut->sBlob);
			}
			SyBlobRelease(&pOut->sBlob);
			if( rc == SXERR_ABORT ){
				/* Output consumer callback request an operation abort. */
				goto Abort;
			}
		}
		pOut++;
	}
	pTos = &pCur[-1];
	break;
					 }

		} /* Switch() */
		pc++; /* Next instruction in the stream */
	} /* For(;;) */
Done:
	SySetRelease(&aArg);
	return SXRET_OK;
Abort:
	SySetRelease(&aArg);
	while( pTos >= pStack ){
		PH7_MemObjRelease(pTos);
		pTos--;
	}
	return PH7_ABORT;
Exception:
	SySetRelease(&aArg);
	while( pTos >= pStack ){
		PH7_MemObjRelease(pTos);
		pTos--;
	}
	return PH7_EXCEPTION;
}
/*
 * Execute as much of a local PH7 bytecode program as we can then return.
 * This function is a wrapper around [VmByteCodeExec()].
 * See block-comment on that function for additional information.
 */
static sxi32 VmLocalExec(ph7_vm *pVm,SySet *pByteCode,ph7_value *pResult)
{
	ph7_value *pStack;
	sxi32 rc;
	/* Allocate a new operand stack */
	pStack = VmNewOperandStack(&(*pVm),SySetUsed(pByteCode));
	if( pStack == 0 ){
		return SXERR_MEM;
	}
	/* Execute the program */
	rc = VmByteCodeExec(&(*pVm),(VmInstr *)SySetBasePtr(pByteCode),pStack,-1,&(*pResult),0,FALSE);
	/* Free the operand stack */
	SyMemBackendFree(&pVm->sAllocator,pStack);
	/* Execution result */
	return rc;
}
/*
 * Invoke any installed shutdown callbacks.
 * Shutdown callbacks are kept in a stack and are registered using one
 * or more calls to [register_shutdown_function()].
 * These callbacks are invoked by the virtual machine when the program
 * execution ends.
 * Refer to the implementation of [register_shutdown_function()] for
 * additional information.
 */
static void VmInvokeShutdownCallbacks(ph7_vm *pVm)
{
	VmShutdownCB *pEntry;
	ph7_value *apArg[10];
	sxu32 n,nEntry;
	int i;
	/* Point to the stack of registered callbacks */
	nEntry = SySetUsed(&pVm->aShutdown);
	for( i = 0 ; i < (int)SX_ARRAYSIZE(apArg) ; i++ ){
		apArg[i] = 0;
	}
	for( n = 0 ; n < nEntry ; ++n ){
		pEntry = (VmShutdownCB *)SySetAt(&pVm->aShutdown,n);
		if( pEntry ){
			/* Prepare callback arguments if any */
			for( i = 0 ; i < pEntry->nArg ; i++ ){
				if( i >= (int)SX_ARRAYSIZE(apArg) ){
					break;
				}
				apArg[i] = &pEntry->aArg[i];
			}
			/* Invoke the callback */
			PH7_VmCallUserFunction(&(*pVm),&pEntry->sCallback,pEntry->nArg,apArg,0);
			/* 
			 * TICKET 1433-56: Try re-access the same entry since the invoked
			 * callback may call [register_shutdown_function()] in it's body. 
			 */
			pEntry = (VmShutdownCB *)SySetAt(&pVm->aShutdown,n);
			if( pEntry ){
				PH7_MemObjRelease(&pEntry->sCallback);
				for( i = 0 ; i < pEntry->nArg ; ++i ){
					PH7_MemObjRelease(apArg[i]);
				}
			}
		}
	}
	SySetReset(&pVm->aShutdown);
}
/*
 * Execute as much of a PH7 bytecode program as we can then return.
 * This function is a wrapper around [VmByteCodeExec()].
 * See block-comment on that function for additional information.
 */
PH7_PRIVATE sxi32 PH7_VmByteCodeExec(ph7_vm *pVm)
{
	/* Make sure we are ready to execute this program */
	if( pVm->nMagic != PH7_VM_RUN ){
		return pVm->nMagic == PH7_VM_EXEC ? SXERR_LOCKED /* Locked VM */ : SXERR_CORRUPT; /* Stale VM */
	}
	/* Set the execution magic number  */
	pVm->nMagic = PH7_VM_EXEC;
	/* Execute the program */
	VmByteCodeExec(&(*pVm),(VmInstr *)SySetBasePtr(pVm->pByteContainer),pVm->aOps,-1,&pVm->sExec,0,FALSE);
	/* Invoke any shutdown callbacks */
	VmInvokeShutdownCallbacks(&(*pVm));
	/*
	 * TICKET 1433-100: Do not remove the PH7_VM_EXEC magic number
	 * so that any following call to [ph7_vm_exec()] without calling
	 * [ph7_vm_reset()] first would fail.
	 */
	return SXRET_OK;
}
/*
 * Invoke the installed VM output consumer callback to consume
 * the desired message.
 * Refer to the implementation of [ph7_context_output()] defined
 * in 'api.c' for additional information.
 */
PH7_PRIVATE sxi32 PH7_VmOutputConsume(
	ph7_vm *pVm,      /* Target VM */
	SyString *pString /* Message to output */
	)
{
	ph7_output_consumer *pCons = &pVm->sVmConsumer;
	sxi32 rc = SXRET_OK;
	/* Call the output consumer */
	if( pString->nByte > 0 ){
		rc = pCons->xConsumer((const void *)pString->zString,pString->nByte,pCons->pUserData);
		if( pCons->xConsumer != VmObConsumer ){
			/* Increment output length */
			pVm->nOutputLen += pString->nByte;
		}
	}
	return rc;
}
/*
 * Format a message and invoke the installed VM output consumer
 * callback to consume the formatted message.
 * Refer to the implementation of [ph7_context_output_format()] defined
 * in 'api.c' for additional information.
 */
PH7_PRIVATE sxi32 PH7_VmOutputConsumeAp(
	ph7_vm *pVm,         /* Target VM */
	const char *zFormat, /* Formatted message to output */
	va_list ap           /* Variable list of arguments */ 
	)
{
	ph7_output_consumer *pCons = &pVm->sVmConsumer;
	sxi32 rc = SXRET_OK;
	SyBlob sWorker;
	/* Format the message and call the output consumer */
	SyBlobInit(&sWorker,&pVm->sAllocator);
	SyBlobFormatAp(&sWorker,zFormat,ap);
	if( SyBlobLength(&sWorker) > 0 ){
		/* Consume the formatted message */
		rc = pCons->xConsumer(SyBlobData(&sWorker),SyBlobLength(&sWorker),pCons->pUserData);
	}
	if( pCons->xConsumer != VmObConsumer ){
		/* Increment output length */
		pVm->nOutputLen += SyBlobLength(&sWorker);
	}
	/* Release the working buffer */
	SyBlobRelease(&sWorker);
	return rc;
}
/*
 * Return a string representation of the given PH7 OP code.
 * This function never fail and always return a pointer
 * to a null terminated string.
 */
static const char * VmInstrToString(sxi32 nOp)
{
	const char *zOp = "Unknown     ";
	switch(nOp){
	case PH7_OP_DONE:       zOp = "DONE       "; break;
	case PH7_OP_HALT:       zOp = "HALT       "; break;
	case PH7_OP_LOAD:       zOp = "LOAD       "; break;
	case PH7_OP_LOADC:      zOp = "LOADC      "; break;
	case PH7_OP_LOAD_MAP:   zOp = "LOAD_MAP   "; break;
	case PH7_OP_LOAD_LIST:  zOp = "LOAD_LIST  "; break;
	case PH7_OP_LOAD_IDX:   zOp = "LOAD_IDX   "; break;
	case PH7_OP_LOAD_CLOSURE:
		                    zOp = "LOAD_CLOSR "; break;
	case PH7_OP_NOOP:       zOp = "NOOP       "; break;
	case PH7_OP_JMP:        zOp = "JMP        "; break;
	case PH7_OP_JZ:         zOp = "JZ         "; break;
	case PH7_OP_JNZ:        zOp = "JNZ        "; break;
	case PH7_OP_POP:        zOp = "POP        "; break;
	case PH7_OP_CAT:        zOp = "CAT        "; break;
	case PH7_OP_CVT_INT:    zOp = "CVT_INT    "; break;
	case PH7_OP_CVT_STR:    zOp = "CVT_STR    "; break;
	case PH7_OP_CVT_REAL:   zOp = "CVT_REAL   "; break;
	case PH7_OP_CALL:       zOp = "CALL       "; break;
	case PH7_OP_UMINUS:     zOp = "UMINUS     "; break;
	case PH7_OP_UPLUS:      zOp = "UPLUS      "; break;
	case PH7_OP_BITNOT:     zOp = "BITNOT     "; break;
	case PH7_OP_LNOT:       zOp = "LOGNOT     "; break;
	case PH7_OP_MUL:        zOp = "MUL        "; break;
	case PH7_OP_DIV:        zOp = "DIV        "; break;
	case PH7_OP_MOD:        zOp = "MOD        "; break;
	case PH7_OP_ADD:        zOp = "ADD        "; break;
	case PH7_OP_SUB:        zOp = "SUB        "; break;
	case PH7_OP_SHL:        zOp = "SHL        "; break;
	case PH7_OP_SHR:        zOp = "SHR        "; break;
	case PH7_OP_LT:         zOp = "LT         "; break;
	case PH7_OP_LE:         zOp = "LE         "; break;
	case PH7_OP_GT:         zOp = "GT         "; break;
	case PH7_OP_GE:         zOp = "GE         "; break;
	case PH7_OP_EQ:         zOp = "EQ         "; break;
	case PH7_OP_NEQ:        zOp = "NEQ        "; break;
	case PH7_OP_TEQ:        zOp = "TEQ        "; break;
	case PH7_OP_TNE:        zOp = "TNE        "; break;
	case PH7_OP_BAND:       zOp = "BITAND     "; break;
	case PH7_OP_BXOR:       zOp = "BITXOR     "; break;
	case PH7_OP_BOR:        zOp = "BITOR      "; break;
	case PH7_OP_LAND:       zOp = "LOGAND     "; break;
	case PH7_OP_LOR:        zOp = "LOGOR      "; break;
	case PH7_OP_LXOR:       zOp = "LOGXOR     "; break;
	case PH7_OP_STORE:      zOp = "STORE      "; break;
	case PH7_OP_STORE_IDX:  zOp = "STORE_IDX  "; break;
	case PH7_OP_STORE_IDX_REF:
		                    zOp = "STORE_IDX_R"; break;
	case PH7_OP_PULL:       zOp = "PULL       "; break;
	case PH7_OP_SWAP:       zOp = "SWAP       "; break;
	case PH7_OP_YIELD:      zOp = "YIELD      "; break;
	case PH7_OP_CVT_BOOL:   zOp = "CVT_BOOL   "; break;
	case PH7_OP_CVT_NULL:   zOp = "CVT_NULL   "; break;
	case PH7_OP_CVT_ARRAY:  zOp = "CVT_ARRAY  "; break;
	case PH7_OP_CVT_OBJ:    zOp = "CVT_OBJ    "; break;
	case PH7_OP_CVT_NUMC:   zOp = "CVT_NUMC   "; break;
	case PH7_OP_INCR:       zOp = "INCR       "; break;
	case PH7_OP_DECR:       zOp = "DECR       "; break;
	case PH7_OP_SEQ:        zOp = "SEQ        "; break;
	case PH7_OP_SNE:        zOp = "SNE        "; break;
	case PH7_OP_NEW:        zOp = "NEW        "; break;
	case PH7_OP_CLONE:      zOp = "CLONE      "; break;
	case PH7_OP_ADD_STORE:  zOp = "ADD_STORE  "; break;
	case PH7_OP_SUB_STORE:  zOp = "SUB_STORE  "; break;
	case PH7_OP_MUL_STORE:  zOp = "MUL_STORE  "; break;
	case PH7_OP_DIV_STORE:  zOp = "DIV_STORE  "; break;
	case PH7_OP_MOD_STORE:  zOp = "MOD_STORE  "; break;
	case PH7_OP_CAT_STORE:  zOp = "CAT_STORE  "; break;
	case PH7_OP_SHL_STORE:  zOp = "SHL_STORE  "; break;
	case PH7_OP_SHR_STORE:  zOp = "SHR_STORE  "; break;
	case PH7_OP_BAND_STORE: zOp = "BAND_STORE "; break;
	case PH7_OP_BOR_STORE:  zOp = "BOR_STORE  "; break;
	case PH7_OP_BXOR_STORE: zOp = "BXOR_STORE "; break;
	case PH7_OP_CONSUME:    zOp = "CONSUME    "; break;
	case PH7_OP_LOAD_REF:   zOp = "LOAD_REF   "; break;
	case PH7_OP_STORE_REF:  zOp = "STORE_REF  "; break;
	case PH7_OP_MEMBER:     zOp = "MEMBER     "; break;
	case PH7_OP_UPLINK:     zOp = "UPLINK     "; break;
	case PH7_OP_ERR_CTRL:   zOp = "ERR_CTRL   "; break;
	case PH7_OP_IS_A:       zOp = "IS_A       "; break;
	case PH7_OP_SWITCH:     zOp = "SWITCH     "; break;
	case PH7_OP_LOAD_EXCEPTION:
		                    zOp = "LOAD_EXCEP "; break;
	case PH7_OP_POP_EXCEPTION:
		                    zOp = "POP_EXCEP  "; break;
	case PH7_OP_THROW:      zOp = "THROW      "; break;
	case PH7_OP_FOREACH_INIT:
		                    zOp = "4EACH_INIT "; break;
	case PH7_OP_FOREACH_STEP:
						    zOp = "4EACH_STEP "; break;
	default:
		break;
	}
	return zOp;
}
/*
 * Dump PH7 bytecodes instructions to a human readable format.
 * The xConsumer() callback which is an used defined function
 * is responsible of consuming the generated dump.
 */
PH7_PRIVATE sxi32 PH7_VmDump(
	ph7_vm *pVm,            /* Target VM */
	ProcConsumer xConsumer, /* Output [i.e: dump] consumer callback */
	void *pUserData         /* Last argument to xConsumer() */
	)
{
	sxi32 rc;
	rc = VmByteCodeDump(pVm->pByteContainer,xConsumer,pUserData);
	return rc;
}
/*
 * Default constant expansion callback used by the 'const' statement if used
 * outside a class body [i.e: global or function scope].
 * Refer to the implementation of [PH7_CompileConstant()] defined
 * in 'compile.c' for additional information.
 */
PH7_PRIVATE void PH7_VmExpandConstantValue(ph7_value *pVal,void *pUserData)
{
	SySet *pByteCode = (SySet *)pUserData;
	/* Evaluate and expand constant value */
	VmLocalExec((ph7_vm *)SySetGetUserData(pByteCode),pByteCode,(ph7_value *)pVal);
}
/*
 * Section:
 *  Function handling functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * int func_num_args(void)
 *   Returns the number of arguments passed to the function.
 * Parameters
 *   None.
 * Return
 *  Total number of arguments passed into the current user-defined function
 *  or -1 if called from the globe scope.
 */
static int vm_builtin_func_num_args(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	VmFrame *pFrame;
	ph7_vm *pVm;
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Current frame */
	pFrame = pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	if( pFrame->pParent == 0 ){
		SXUNUSED(nArg);
		SXUNUSED(apArg);
		/* Global frame,return -1 */
		ph7_result_int(pCtx,-1);
		return SXRET_OK;
	}
	/* Total number of arguments passed to the enclosing function */
	nArg = (int)SySetUsed(&pFrame->sArg);
	ph7_result_int(pCtx,nArg);
	return SXRET_OK;
}
/*
 * value func_get_arg(int $arg_num)
 *   Return an item from the argument list.
 * Parameters
 *  Argument number(index start from zero).
 * Return
 *  Returns the specified argument or FALSE on error.
 */
static int vm_builtin_func_get_arg(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pObj = 0;
	VmSlot *pSlot = 0;
	VmFrame *pFrame;
	ph7_vm *pVm;
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Current frame */
	pFrame = pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	if( nArg < 1 || pFrame->pParent == 0 ){
		/* Global frame or Missing arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Called in the global scope");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Extract the desired index */
	nArg = ph7_value_to_int(apArg[0]);
	if( nArg < 0 || nArg >= (int)SySetUsed(&pFrame->sArg) ){
		/* Invalid index,return FALSE */
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Extract the desired argument */
	if( (pSlot = (VmSlot *)SySetAt(&pFrame->sArg,(sxu32)nArg)) != 0 ){
		if( (pObj = (ph7_value *)SySetAt(&pVm->aMemObj,pSlot->nIdx)) != 0 ){
			/* Return the desired argument */
			ph7_result_value(pCtx,(ph7_value *)pObj);
		}else{
			/* No such argument,return false */
			ph7_result_bool(pCtx,0);
		}
	}else{
		/* CAN'T HAPPEN */
		ph7_result_bool(pCtx,0);
	}
	return SXRET_OK;
}
/*
 * array func_get_args_byref(void)
 *   Returns an array comprising a function's argument list.
 * Parameters
 *  None.
 * Return
 *  Returns an array in which each element is a POINTER to the corresponding
 *  member of the current user-defined function's argument list.
 *  Otherwise FALSE is returned on failure.
 * NOTE:
 *  Arguments are returned to the array by reference.
 */
static int vm_builtin_func_get_args_byref(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray;
	VmFrame *pFrame;
	VmSlot *aSlot;
	sxu32 n;
	/* Point to the current frame */
	pFrame = pCtx->pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	if( pFrame->pParent == 0 ){
		/* Global frame,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Called in the global scope");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Start filling the array with the given arguments (Pass by reference) */
	aSlot = (VmSlot *)SySetBasePtr(&pFrame->sArg);
	for( n = 0;  n < SySetUsed(&pFrame->sArg) ; n++ ){
		PH7_HashmapInsertByRef((ph7_hashmap *)pArray->x.pOther,0/*Automatic index assign*/,aSlot[n].nIdx);
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return SXRET_OK;
}
/*
 * array func_get_args(void)
 *   Returns an array comprising a copy of function's argument list.
 * Parameters
 *  None.
 * Return
 *  Returns an array in which each element is a copy of the corresponding
 *  member of the current user-defined function's argument list.
 *  Otherwise FALSE is returned on failure.
 */
static int vm_builtin_func_get_args(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pObj = 0;
	ph7_value *pArray;
	VmFrame *pFrame;
	VmSlot *aSlot;
	sxu32 n;
	/* Point to the current frame */
	pFrame = pCtx->pVm->pFrame;
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	if( pFrame->pParent == 0 ){
		/* Global frame,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Called in the global scope");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Start filling the array with the given arguments */
	aSlot = (VmSlot *)SySetBasePtr(&pFrame->sArg);
	for( n = 0;  n < SySetUsed(&pFrame->sArg) ; n++ ){
		pObj = (ph7_value *)SySetAt(&pCtx->pVm->aMemObj,aSlot[n].nIdx);
		if( pObj ){
			ph7_array_add_elem(pArray,0/* Automatic index assign*/,pObj);
		}
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return SXRET_OK;
}
/*
 * bool function_exists(string $name)
 *  Return TRUE if the given function has been defined.
 * Parameters
 *  The name of the desired function.
 * Return
 *  Return TRUE if the given function has been defined.False otherwise
 */
static int vm_builtin_func_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zName;
	ph7_vm *pVm;
	int nLen;
	int res;
	if( nArg < 1 ){
		/* Missing argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Extract the function name */
	zName = ph7_value_to_string(apArg[0],&nLen);
	/* Assume the function is not defined */
	res = 0;
	/* Perform the lookup */
	if( SyHashGet(&pVm->hFunction,(const void *)zName,(sxu32)nLen) != 0 ||
		SyHashGet(&pVm->hHostFunction,(const void *)zName,(sxu32)nLen) != 0 ){
			/* Function is defined */
			res = 1;
	}
	ph7_result_bool(pCtx,res);
	return SXRET_OK;
}
/* Forward declaration */
static ph7_class * VmExtractClassFromValue(ph7_vm *pVm,ph7_value *pArg);
/*
 * Verify that the contents of a variable can be called as a function.
 * [i.e: Whether it is callable or not].
 * Return TRUE if callable.FALSE otherwise.
 */
PH7_PRIVATE int PH7_VmIsCallable(ph7_vm *pVm,ph7_value *pValue,int CallInvoke)
{
	int res = 0;
	if( pValue->iFlags & MEMOBJ_OBJ ){
		/* Call the magic method __invoke if available */
		ph7_class_instance *pThis = (ph7_class_instance *)pValue->x.pOther;
		ph7_class_method *pMethod;
		pMethod = PH7_ClassExtractMethod(pThis->pClass,"__invoke",sizeof("__invoke")-1);
		if( pMethod && CallInvoke ){
			ph7_value sResult;
			sxi32 rc;
			/* Invoke the magic method and extract the result */
			PH7_MemObjInit(pVm,&sResult);
			rc = PH7_VmCallClassMethod(pVm,pThis,pMethod,&sResult,0,0);
			if( rc == SXRET_OK && (sResult.iFlags & (MEMOBJ_BOOL|MEMOBJ_INT)) ){
				res = sResult.x.iVal != 0;
			}
			PH7_MemObjRelease(&sResult);
		}
	}else if( pValue->iFlags & MEMOBJ_HASHMAP ){
		ph7_hashmap *pMap = (ph7_hashmap *)pValue->x.pOther;
		if( pMap->nEntry > 1 ){
			ph7_class *pClass;
			ph7_value *pV;
			/* Extract the target class */
			pV = (ph7_value *)SySetAt(&pVm->aMemObj,pMap->pFirst->nValIdx);
			if( pV ){
				pClass = VmExtractClassFromValue(pVm,pV);
				if( pClass ){
					ph7_class_method *pMethod;
					/* Extract the target method */
					pV = (ph7_value *)SySetAt(&pVm->aMemObj,pMap->pFirst->pPrev->nValIdx);
					if( pV && (pV->iFlags & MEMOBJ_STRING) && SyBlobLength(&pV->sBlob) > 0 ){
						/* Perform the lookup */
						pMethod = PH7_ClassExtractMethod(pClass,(const char *)SyBlobData(&pV->sBlob),SyBlobLength(&pV->sBlob));
						if( pMethod ){
							/* Method is callable */
							res = 1;
						}
					}
				}
			}
		}
	}else if( pValue->iFlags & MEMOBJ_STRING ){
		const char *zName;
		int nLen;
		/* Extract the name */
		zName = ph7_value_to_string(pValue,&nLen);
		/* Perform the lookup */
		if( SyHashGet(&pVm->hFunction,(const void *)zName,(sxu32)nLen) != 0 ||
			SyHashGet(&pVm->hHostFunction,(const void *)zName,(sxu32)nLen) != 0 ){
				/* Function is callable */
				res = 1;
		}
	}
	return res;
}
/*
 * bool is_callable(callable $name[,bool $syntax_only = false])
 * Verify that the contents of a variable can be called as a function.
 * Parameters
 * $name
 *    The callback function to check
 * $syntax_only
 *    If set to TRUE the function only verifies that name might be a function or method.
 *    It will only reject simple variables that are not strings, or an array that does
 *    not have a valid structure to be used as a callback. The valid ones are supposed
 *    to have only 2 entries, the first of which is an object or a string, and the second
 *    a string.
 * Return
 *  TRUE if name is callable, FALSE otherwise.
 */
static int vm_builtin_is_callable(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm;	
	int res;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Perform the requested operation */
	res = PH7_VmIsCallable(pVm,apArg[0],TRUE);
	ph7_result_bool(pCtx,res);
	return SXRET_OK;
}
/*
 * Hash walker callback used by the [get_defined_functions()] function
 * defined below.
 */
static int VmHashFuncStep(SyHashEntry *pEntry,void *pUserData)
{
	ph7_value *pArray = (ph7_value *)pUserData;
	ph7_value sName;
	sxi32 rc;
	/* Prepare the function name for insertion */
	PH7_MemObjInitFromString(pArray->pVm,&sName,0);
	PH7_MemObjStringAppend(&sName,(const char *)pEntry->pKey,pEntry->nKeyLen);
	/* Perform the insertion */
	rc = ph7_array_add_elem(pArray,0/* Automatic index assign */,&sName); /* Will make it's own copy */
	PH7_MemObjRelease(&sName);
	return rc;
}
/*
 * array get_defined_functions(void)
 *  Returns an array of all defined functions.
 * Parameter
 *  None.
 * Return
 *  Returns an multidimensional array containing a list of all defined functions
 *  both built-in (internal) and user-defined.
 *  The internal functions will be accessible via $arr["internal"], and the user 
 *  defined ones using $arr["user"]. 
 * Note:
 *  NULL is returned on failure.
 */
static int vm_builtin_get_defined_func(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pEntry;
	/* NOTE:
	 * Don't worry about freeing memory here,every allocated resource will be released
	 * automatically by the engine as soon we return from this foreign function.
	 */
	pArray = ph7_context_new_array(pCtx);
 	if( pArray == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	pEntry = ph7_context_new_array(pCtx);
	if( pEntry == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Fill with the appropriate information */
	SyHashForEach(&pCtx->pVm->hHostFunction,VmHashFuncStep,pEntry);
	/* Create the 'internal' index */
	ph7_array_add_strkey_elem(pArray,"internal",pEntry); /* Will make it's own copy */
	/* Create the user-func array */
	pEntry = ph7_context_new_array(pCtx);
	if( pEntry == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Fill with the appropriate information */
	SyHashForEach(&pCtx->pVm->hFunction,VmHashFuncStep,pEntry);
	/* Create the 'user' index */
	ph7_array_add_strkey_elem(pArray,"user",pEntry); /* Will make it's own copy */
	/* Return the multi-dimensional array */
	ph7_result_value(pCtx,pArray);
	return SXRET_OK;
}
/*
 * void register_shutdown_function(callable $callback[,mixed $param,...)
 *  Register a function for execution on shutdown.
 * Note
 *  Multiple calls to register_shutdown_function() can be made, and each will
 *  be called in the same order as they were registered.
 * Parameters
 *  $callback
 *   The shutdown callback to register.
 * $param
 *  One or more Parameter to pass to the registered callback.
 * Return
 *  Nothing.
 */
static int vm_builtin_register_shutdown_function(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	VmShutdownCB sEntry;
	int i,j;
	if( nArg < 1 || (apArg[0]->iFlags & (MEMOBJ_STRING|MEMOBJ_HASHMAP)) == 0 ){
		/* Missing/Invalid arguments,return immediately */
		return PH7_OK;
	}
	/* Zero the Entry */
	SyZero(&sEntry,sizeof(VmShutdownCB));
	/* Initialize fields */
	PH7_MemObjInit(pCtx->pVm,&sEntry.sCallback);
	/* Save the callback name for later invocation name */
	PH7_MemObjStore(apArg[0],&sEntry.sCallback); 
	for( i = 0 ; i < (int)SX_ARRAYSIZE(sEntry.aArg) ; ++i ){
		PH7_MemObjInit(pCtx->pVm,&sEntry.aArg[i]);
	}
	/* Copy arguments */
	for(j = 0, i = 1 ; i < nArg ; j++,i++ ){
		if( j >= (int)SX_ARRAYSIZE(sEntry.aArg) ){
			/* Limit reached */
			break;
		}
		PH7_MemObjStore(apArg[i],&sEntry.aArg[j]);
	}
	sEntry.nArg = j;
	/* Install the callback */
	SySetPut(&pCtx->pVm->aShutdown,(const void *)&sEntry);
	return PH7_OK;
}
/*
 * Section:
 *  Class handling functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * Extract the top active class. NULL is returned
 * if the class stack is empty.
 */
PH7_PRIVATE ph7_class * PH7_VmPeekTopClass(ph7_vm *pVm)
{
	SySet *pSet = &pVm->aSelf;
	ph7_class **apClass;
	if( SySetUsed(pSet) <= 0 ){
		/* Empty stack,return NULL */
		return 0;
	}
	/* Peek the last entry */
	apClass = (ph7_class **)SySetBasePtr(pSet);
	return apClass[pSet->nUsed - 1];
}
/*
 * string get_class ([ object $object = NULL ] )
 *   Returns the name of the class of an object
 * Parameters
 *  object
 *   The tested object. This parameter may be omitted when inside a class.
 * Return
 *  The name of the class of which object is an instance.
 *  Returns FALSE if object is not an object.
 *  If object is omitted when inside a class, the name of that class is returned.
 */
static int vm_builtin_get_class(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_class *pClass;
	SyString *pName;
	if( nArg < 1 ){
		/* Check if we are inside a class */
		pClass = PH7_VmPeekTopClass(pCtx->pVm);
		if( pClass ){
			/* Point to the class name */
			pName = &pClass->sName;
			ph7_result_string(pCtx,pName->zString,(int)pName->nByte);
		}else{
			/* Not inside class,return FALSE */
			ph7_result_bool(pCtx,0);
		}
	}else{
		/* Extract the target class */
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
		if( pClass ){
			pName = &pClass->sName;
			/* Return the class name */
			ph7_result_string(pCtx,pName->zString,(int)pName->nByte);
		}else{
			/* Not a class instance,return FALSE */
			ph7_result_bool(pCtx,0);
		}
	}
	return PH7_OK;
}
/*
 * string get_parent_class([object $object = NULL ] )
 *   Returns the name of the parent class of an object
 * Parameters
 *  object
 *   The tested object. This parameter may be omitted when inside a class.
 * Return
 *  The name of the parent class of which object is an instance.
 *  Returns FALSE if object is not an object or if the object does
 *  not have a parent.
 *  If object is omitted when inside a class, the name of that class is returned.
 */
static int vm_builtin_get_parent_class(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_class *pClass;
	SyString *pName;
	if( nArg < 1 ){
		/* Check if we are inside a class [i.e: a method call]*/
		pClass = PH7_VmPeekTopClass(pCtx->pVm);
		if( pClass && pClass->pBase ){
			/* Point to the class name */
			pName = &pClass->pBase->sName;
			ph7_result_string(pCtx,pName->zString,(int)pName->nByte);
		}else{
			/* Not inside class,return FALSE */
			ph7_result_bool(pCtx,0);
		}
	}else{
		/* Extract the target class */
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
		if( pClass ){
			if( pClass->pBase ){
				pName = &pClass->pBase->sName;
				/* Return the parent class name */
				ph7_result_string(pCtx,pName->zString,(int)pName->nByte);
			}else{
				/* Object does not have a parent class */
				ph7_result_bool(pCtx,0);
			}
		}else{
			/* Not a class instance,return FALSE */
			ph7_result_bool(pCtx,0);
		}
	}
	return PH7_OK;
}
/*
 * string get_called_class(void)
 *   Gets the name of the class the static method is called in. 
 * Parameters
 *  None.
 * Return
 *  Returns the class name. Returns FALSE if called from outside a class. 
 */
static int vm_builtin_get_called_class(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_class *pClass;
	/* Check if we are inside a class [i.e: a method call] */
	pClass = PH7_VmPeekTopClass(pCtx->pVm);
	if( pClass ){
		SyString *pName;
		/* Point to the class name */
		pName = &pClass->sName;
		ph7_result_string(pCtx,pName->zString,(int)pName->nByte);
	}else{
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Not inside class,return FALSE */
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * Extract a ph7_class from the given ph7_value.
 * The given value must be of type object [i.e: class instance] or
 * string which hold the class name.
 */
static ph7_class * VmExtractClassFromValue(ph7_vm *pVm,ph7_value *pArg)
{
	ph7_class *pClass = 0;
	if( ph7_value_is_object(pArg) ){
		/* Class instance already loaded,no need to perform a lookup */
		pClass = ((ph7_class_instance *)pArg->x.pOther)->pClass;
	}else if( ph7_value_is_string(pArg) ){
		const char *zClass;
		int nLen;
		/* Extract class name */
		zClass = ph7_value_to_string(pArg,&nLen);
		if( nLen > 0 ){
			SyHashEntry *pEntry;
			/* Perform a lookup */
			pEntry = SyHashGet(&pVm->hClass,(const void *)zClass,(sxu32)nLen);
			if( pEntry ){
				/* Point to the desired class */
				pClass = (ph7_class *)pEntry->pUserData;
			}
		}
	}
	return pClass;
}
/*
 * bool property_exists(mixed $class,string $property)
 *   Checks if the object or class has a property.
 * Parameters
 *  class
 *   The class name or an object of the class to test for
 * property
 *  The name of the property
 * Return
 *   Returns TRUE if the property exists,FALSE otherwise. 
 */
static int vm_builtin_property_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume attribute does not exists */
	if( nArg > 1 ){
		ph7_class *pClass;
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
		if( pClass ){
			const char *zName; 
			int nLen;
			/* Extract attribute name */
			zName = ph7_value_to_string(apArg[1],&nLen);
			if( nLen > 0 ){
				/* Perform the lookup in the attribute and method table */
				if( SyHashGet(&pClass->hAttr,(const void *)zName,(sxu32)nLen) != 0 
					|| SyHashGet(&pClass->hMethod,(const void *)zName,(sxu32)nLen) != 0 ){
						/* property exists,flag that */
						res = 1;
				}
			}
		}
	}
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool method_exists(mixed $class,string $method)
 *   Checks if the given method is a class member.
 * Parameters
 *  class
 *   The class name or an object of the class to test for
 * property
 *  The name of the method
 * Return
 *   Returns TRUE if the method exists,FALSE otherwise. 
 */
static int vm_builtin_method_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume method does not exists */
	if( nArg > 1 ){
		ph7_class *pClass;
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
		if( pClass ){
			const char *zName; 
			int nLen;
			/* Extract method name */
			zName = ph7_value_to_string(apArg[1],&nLen);
			if( nLen > 0 ){
				/* Perform the lookup in the method table */
				if( SyHashGet(&pClass->hMethod,(const void *)zName,(sxu32)nLen) != 0 ){
					/* method exists,flag that */
					res = 1;
				}
			}
		}
	}
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool class_exists(string $class_name [, bool $autoload = true ] )
 *   Checks if the class has been defined.
 * Parameters
 *  class_name
 *   The class name. The name is matched in a case-sensitive manner 
 *   unlinke the standard PHP engine.
 *  autoload
 *   Whether or not to call __autoload by default.
 * Return
 *   TRUE if class_name is a defined class, FALSE otherwise. 
 */
static int vm_builtin_class_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume class does not exists */
	if( nArg > 0 ){
		const char *zName;
		int nLen;
		/* Extract given name */
		zName = ph7_value_to_string(apArg[0],&nLen);
		/* Perform a hashlookup */
		if( nLen > 0 && SyHashGet(&pCtx->pVm->hClass,(const void *)zName,(sxu32)nLen) != 0 ){
			/* class is available */
			res = 1;
		}
	}
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool interface_exists(string $class_name [, bool $autoload = true ] )
 *   Checks if the interface has been defined.
 * Parameters
 *  class_name
 *   The class name. The name is matched in a case-sensitive manner 
 *   unlinke the standard PHP engine.
 *  autoload
 *   Whether or not to call __autoload by default.
 * Return
 *   TRUE if class_name is a defined class, FALSE otherwise. 
 */
static int vm_builtin_interface_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume class does not exists */
	if( nArg > 0 ){
		SyHashEntry *pEntry = 0;
		const char *zName;
		int nLen;
		/* Extract given name */
		zName = ph7_value_to_string(apArg[0],&nLen);
		/* Perform a hashlookup */
		if( nLen > 0 ){
			pEntry = SyHashGet(&pCtx->pVm->hClass,(const void *)zName,(sxu32)nLen);
		}
		if( pEntry ){
			ph7_class *pClass = (ph7_class *)pEntry->pUserData;
			while( pClass ){
				if( pClass->iFlags & PH7_CLASS_INTERFACE ){
					/* interface is available */
					res = 1;
					break;
				}
				/* Next with the same name */
				pClass = pClass->pNextName;
			}
		}
	}
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool class_alias([string $original[,string $alias ]])
 *   Creates an alias for a class.
 * Parameters
 *  original
 *    The original class.
 *  alias
 *   The alias name for the class.
 * Return
 *   Returns TRUE on success or FALSE on failure. 
 */
static int vm_builtin_class_alias(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zOld,*zNew;
	int nOldLen,nNewLen;
	SyHashEntry *pEntry;
	ph7_class *pClass;
	char *zDup;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract old class name */
	zOld = ph7_value_to_string(apArg[0],&nOldLen);
	/* Extract alias name */
	zNew = ph7_value_to_string(apArg[1],&nNewLen);
	if( nNewLen < 1 ){
		/* Invalid alias name,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform a hash lookup */
	pEntry = SyHashGet(&pCtx->pVm->hClass,(const void *)zOld,(sxu32)nOldLen);
	if( pEntry ==  0 ){
		/* No such class,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the class */
	pClass = (ph7_class *)pEntry->pUserData;
	/* Duplicate alias name */
	zDup = SyMemBackendStrDup(&pCtx->pVm->sAllocator,zNew,(sxu32)nNewLen);
	if( zDup == 0 ){
		/* Out of memory,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Create the alias */
	rc = SyHashInsert(&pCtx->pVm->hClass,(const void *)zDup,(sxu32)nNewLen,pClass);
	if( rc != SXRET_OK ){
		SyMemBackendFree(&pCtx->pVm->sAllocator,zDup);
	}
	ph7_result_bool(pCtx,rc == SXRET_OK);
	return PH7_OK;
}
/*
 * array get_declared_classes(void)
 *   Returns an array with the name of the defined classes
 * Parameters
 *  None
 * Return
 *   Returns an array of the names of the declared classes
 *   in the current script. 
 * Note:
 *   NULL is returned on failure.
 */
static int vm_builtin_get_declared_classes(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pName,*pArray;
	SyHashEntry *pEntry;
	/* Create a new array first */
	pArray = ph7_context_new_array(pCtx);
	pName = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pName == 0){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Out of memory,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the array with the defined classes */
	SyHashResetLoopCursor(&pCtx->pVm->hClass);
	while((pEntry = SyHashGetNextEntry(&pCtx->pVm->hClass)) != 0 ){
		ph7_class *pClass = (ph7_class *)pEntry->pUserData;
		/* Do not register classes defined as interfaces */
		if( (pClass->iFlags & PH7_CLASS_INTERFACE) == 0 ){
			ph7_value_string(pName,SyStringData(&pClass->sName),(int)SyStringLength(&pClass->sName));
			/* insert class name */
			ph7_array_add_elem(pArray,0/*Automatic index assign*/,pName); /* Will make it's own copy */
			/* Reset the cursor */
			ph7_value_reset_string_cursor(pName);
		}
	}
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array get_declared_interfaces(void)
 *   Returns an array with the name of the defined interfaces
 * Parameters
 *  None
 * Return
 *   Returns an array of the names of the declared interfaces
 *   in the current script. 
 * Note:
 *   NULL is returned on failure.
 */
static int vm_builtin_get_declared_interfaces(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pName,*pArray;
	SyHashEntry *pEntry;
	/* Create a new array first */
	pArray = ph7_context_new_array(pCtx);
	pName = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pName == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Out of memory,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the array with the defined classes */
	SyHashResetLoopCursor(&pCtx->pVm->hClass);
	while((pEntry = SyHashGetNextEntry(&pCtx->pVm->hClass)) != 0 ){
		ph7_class *pClass = (ph7_class *)pEntry->pUserData;
		/* Register classes defined as interfaces only */
		if( pClass->iFlags & PH7_CLASS_INTERFACE ){
			ph7_value_string(pName,SyStringData(&pClass->sName),(int)SyStringLength(&pClass->sName));
			/* insert interface name */
			ph7_array_add_elem(pArray,0/*Automatic index assign*/,pName); /* Will make it's own copy */
			/* Reset the cursor */
			ph7_value_reset_string_cursor(pName);
		}
	}
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array get_class_methods(string/object $class_name)
 *   Returns an array with the name of the class methods
 * Parameters
 *  class_name
 *  The class name or class instance
 * Return
 *  Returns an array of method names defined for the class specified by class_name.
 *  In case of an error, it returns NULL.  
 * Note:
 *   NULL is returned on failure.
 */
static int vm_builtin_get_class_methods(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pName,*pArray;
	SyHashEntry *pEntry;
	ph7_class *pClass;
	/* Extract the target class first */
	pClass = 0;
	if( nArg > 0 ){
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
	}
	if( pClass == 0 ){
		/* No such class,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array  */
	pArray = ph7_context_new_array(pCtx);
	pName = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pName == 0){
		/* Out of memory,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the array with the defined methods */
	SyHashResetLoopCursor(&pClass->hMethod);
	while((pEntry = SyHashGetNextEntry(&pClass->hMethod)) != 0 ){
		ph7_class_method *pMethod = (ph7_class_method *)pEntry->pUserData;
		/* Insert method name */
		ph7_value_string(pName,SyStringData(&pMethod->sFunc.sName),(int)SyStringLength(&pMethod->sFunc.sName));
		ph7_array_add_elem(pArray,0/*Automatic index assign*/,pName); /* Will make it's own copy */
		/* Reset the cursor */
		ph7_value_reset_string_cursor(pName);
	}
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	/*
	 * Don't worry about freeing memory here,everything will be relased
	 * automatically as soon we return from this foreign function.
	 */
	return PH7_OK;
}
/*
 * This function return TRUE(1) if the given class attribute stored 
 * in the pAttrName parameter is visible and thus can be extracted
 * from the current scope.Otherwise FALSE is returned.
 */
static int VmClassMemberAccess(
	ph7_vm *pVm,               /* Target VM */
	ph7_class *pClass,         /* Target Class */
	const SyString *pAttrName, /* Attribute name */
	sxi32 iProtection,         /* Attribute protection level [i.e: public,protected or private] */
	int bLog                   /* TRUE to log forbidden access. */
	)
{
	if( iProtection != PH7_CLASS_PROT_PUBLIC ){
		VmFrame *pFrame = pVm->pFrame;
		ph7_vm_func *pVmFunc;
		while( pFrame->pParent && (pFrame->iFlags & (VM_FRAME_EXCEPTION|VM_FRAME_CATCH) ) ){
			/* Safely ignore the exception frame */
			pFrame = pFrame->pParent;
		}
		pVmFunc = (ph7_vm_func *)pFrame->pUserData;
		if( pVmFunc == 0 || (pVmFunc->iFlags & VM_FUNC_CLASS_METHOD) == 0 ){
			goto dis; /* Access is forbidden */
		}
		if( iProtection == PH7_CLASS_PROT_PRIVATE ){
			/* Must be the same instance */
			if( (ph7_class *)pVmFunc->pUserData != pClass ){
				goto dis; /* Access is forbidden */
			}
		}else{
			/* Protected */
			ph7_class *pBase = (ph7_class *)pVmFunc->pUserData;
			/* Must be a derived class */
			if( !VmInstanceOf(pClass,pBase) ){
				goto dis; /* Access is forbidden */
			}
		}
	}
	return 1; /* Access is granted */
dis:
	if( bLog ){
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,
			"Access to the class attribute '%z->%z' is forbidden",
			&pClass->sName,pAttrName);
	}
	return 0; /* Access is forbidden */
}
/*
 * array get_class_vars(string/object $class_name)
 *   Get the default properties of the class
 * Parameters
 *  class_name
 *   The class name or class instance
 * Return
 *  Returns an associative array of declared properties visible from the current scope
 *  with their default value. The resulting array elements are in the form 
 *  of varname => value.  
 * Note:
 *   NULL is returned on failure.
 */
static int vm_builtin_get_class_vars(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pName,*pArray,sValue;
	SyHashEntry *pEntry;
	ph7_class *pClass;
	/* Extract the target class first */
	pClass = 0;
	if( nArg > 0 ){
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
	}
	if( pClass == 0 ){
		/* No such class,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array  */
	pArray = ph7_context_new_array(pCtx);
	pName = ph7_context_new_scalar(pCtx);
	PH7_MemObjInit(pCtx->pVm,&sValue);
	if( pArray == 0 || pName == 0){
		/* Out of memory,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the array with the defined attribute visible from the current scope */
	SyHashResetLoopCursor(&pClass->hAttr);
	while((pEntry = SyHashGetNextEntry(&pClass->hAttr)) != 0 ){
		ph7_class_attr *pAttr = (ph7_class_attr *)pEntry->pUserData;
		/* Check if the access is allowed */
		if( VmClassMemberAccess(pCtx->pVm,pClass,&pAttr->sName,pAttr->iProtection,FALSE) ){
			SyString *pAttrName = &pAttr->sName;
			ph7_value *pValue = 0;
			if( pAttr->iFlags & (PH7_CLASS_ATTR_CONSTANT|PH7_CLASS_ATTR_STATIC) ){
				/* Extract static attribute value which is always computed */
				pValue = (ph7_value *)SySetAt(&pCtx->pVm->aMemObj,pAttr->nIdx);
			}else{
				if( SySetUsed(&pAttr->aByteCode) > 0 ){
					PH7_MemObjRelease(&sValue);
					/* Compute default value (any complex expression) associated with this attribute */ 
					VmLocalExec(pCtx->pVm,&pAttr->aByteCode,&sValue);
					pValue = &sValue;
				}
			}
			/* Fill in the array */
			ph7_value_string(pName,pAttrName->zString,pAttrName->nByte);
			ph7_array_add_elem(pArray,pName,pValue); /* Will make it's own copy */
			/* Reset the cursor */
			ph7_value_reset_string_cursor(pName);
		}
	}
	PH7_MemObjRelease(&sValue);
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	/*
	 * Don't worry about freeing memory here,everything will be relased
	 * automatically as soon we return from this foreign function.
	 */
	return PH7_OK;
}
/*
 * array get_object_vars(object $this)
 *   Gets the properties of the given object
 * Parameters
 *  this
 *   A class instance
 * Return
 *  Returns an associative array of defined object accessible non-static properties
 *  for the specified object in scope. If a property have not been assigned a value
 *  it will be returned with a NULL value.  
 * Note:
 *   NULL is returned on failure.
 */
static int vm_builtin_get_object_vars(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_class_instance *pThis = 0;
	ph7_value *pName,*pArray;
	SyHashEntry *pEntry;
	if( nArg > 0 && (apArg[0]->iFlags & MEMOBJ_OBJ) ){
		/* Extract the target instance */
		pThis = (ph7_class_instance *)apArg[0]->x.pOther;
	}
	if( pThis == 0 ){
		/* No such instance,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array  */
	pArray = ph7_context_new_array(pCtx);
	pName = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pName == 0){
		/* Out of memory,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the array with the defined attribute visible from the current scope */
	SyHashResetLoopCursor(&pThis->hAttr);
	while((pEntry = SyHashGetNextEntry(&pThis->hAttr)) != 0 ){
		VmClassAttr *pVmAttr = (VmClassAttr *)pEntry->pUserData;
		SyString *pAttrName;
		if( pVmAttr->pAttr->iFlags & (PH7_CLASS_ATTR_STATIC|PH7_CLASS_ATTR_CONSTANT) ){
			/* Only non-static/constant attributes are extracted */
			continue;
		}
		pAttrName = &pVmAttr->pAttr->sName;
		/* Check if the access is allowed */
		if( VmClassMemberAccess(pCtx->pVm,pThis->pClass,pAttrName,pVmAttr->pAttr->iProtection,FALSE) ){
			ph7_value *pValue = 0;
			/* Extract attribute */
			pValue = PH7_ClassInstanceExtractAttrValue(pThis,pVmAttr);
			if( pValue ){
				/* Insert attribute name in the array */
				ph7_value_string(pName,pAttrName->zString,pAttrName->nByte);
				ph7_array_add_elem(pArray,pName,pValue); /* Will make it's own copy */
			}
			/* Reset the cursor */
			ph7_value_reset_string_cursor(pName);
		}
	}
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	/*
	 * Don't worry about freeing memory here,everything will be relased
	 * automatically as soon we return from this foreign function.
	 */
	return PH7_OK;
}
/*
 * This function returns TRUE if the given class is an implemented
 * interface.Otherwise FALSE is returned. 
 */
static int VmQueryInterfaceSet(ph7_class *pClass,SySet *pSet)
{
	ph7_class **apInterface;
	sxu32 n;
	if( SySetUsed(pSet) < 1 ){
		/* Empty interface container */
		return FALSE;
	}
	/* Point to the set of implemented interfaces */
	apInterface = (ph7_class **)SySetBasePtr(pSet);
	/* Perform the lookup */
	for( n = 0 ; n < SySetUsed(pSet) ; n++ ){
		if( apInterface[n] == pClass ){
			return TRUE;
		}
	}
	return FALSE;
}
/*
 * This function returns TRUE if the given class (first argument)
 * is an instance of the main class (second argument).
 * Otherwise FALSE is returned. 
 */
static int VmInstanceOf(ph7_class *pThis,ph7_class *pClass) 
{
	ph7_class *pParent;
	sxi32 rc;
	if( pThis == pClass ){
		/* Instance of the same class */
		return TRUE;
	}
	/* Check implemented interfaces */
	rc = VmQueryInterfaceSet(pClass,&pThis->aInterface);
	if( rc ){
		return TRUE;
	}
	/* Check parent classes */
	pParent = pThis->pBase;
	while( pParent ){
		if( pParent == pClass ){
			/* Same instance */
			return TRUE;
		}
		/* Check the implemented interfaces */
		rc = VmQueryInterfaceSet(pClass,&pParent->aInterface);
		if( rc ){
			return TRUE;
		}
		/* Point to the parent class */
		pParent = pParent->pBase;
	}
	/* Not an instance of the the given class */
	return FALSE;
}
/*
 * This function returns TRUE if the given class (first argument)
 * is a subclass of the main class (second argument).
 * Otherwise FALSE is returned. 
 */
static int VmSubclassOf(ph7_class *pClass,ph7_class *pBase)
{
	SySet *pInterface = &pClass->aInterface;
	SyHashEntry *pEntry;
	SyString *pName;
	sxi32 rc;
	while( pClass ){
		pName = &pClass->sName;
		/* Query the derived hashtable */
		pEntry = SyHashGet(&pBase->hDerived,(const void *)pName->zString,pName->nByte);
		if( pEntry ){
			return TRUE;
		}
		pClass = pClass->pBase;
	}
	rc = VmQueryInterfaceSet(pBase,pInterface);
	if( rc ){
		return TRUE;
	}
	/* Not a subclass */
	return FALSE;
}
/*
 * bool is_a(object $object,string $class_name)
 *   Checks if the object is of this class or has this class as one of its parents.
 * Parameters
 *  object
 *   The tested object
 * class_name
 *  The class name
 * Return
 *   Returns TRUE if the object is of this class or has this class as one of its
 *   parents, FALSE otherwise. 
 */
static int vm_builtin_is_a(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume FALSE by default */
	if( nArg > 1 && ph7_value_is_object(apArg[0])  ){
		ph7_class_instance *pThis = (ph7_class_instance *)apArg[0]->x.pOther;
		ph7_class *pClass;
		/* Extract the given class */
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[1]);
		if( pClass ){
			/* Perform the query */
			res = VmInstanceOf(pThis->pClass,pClass);
		}
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_subclass_of(object/string $object,object/string $class_name)
 *   Checks if the object has this class as one of its parents.
 * Parameters
 *  object
 *   The tested object
 * class_name
 *  The class name
 * Return
 *  This function returns TRUE if the object , belongs to a class
 *  which is a subclass of class_name, FALSE otherwise. 
 */
static int vm_builtin_is_subclass_of(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume FALSE by default */
	if( nArg > 1 ){
		ph7_class *pClass,*pMain;
		/* Extract the given classes */
		pClass = VmExtractClassFromValue(pCtx->pVm,apArg[0]);
		pMain = VmExtractClassFromValue(pCtx->pVm,apArg[1]);
		if( pClass && pMain ){
			/* Perform the query */
			res = VmSubclassOf(pClass,pMain);
		}
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * Call a class method where the name of the method is stored in the pMethod
 * parameter and the given arguments are stored in the apArg[] array.
 * Return SXRET_OK if the method was successfuly called.Any other
 * return value indicates failure.
 */
PH7_PRIVATE sxi32 PH7_VmCallClassMethod(
	ph7_vm *pVm,               /* Target VM */
	ph7_class_instance *pThis, /* Target class instance [i.e: Object in the PHP jargon]*/
	ph7_class_method *pMethod, /* Method name */
	ph7_value *pResult,        /* Store method return value here. NULL otherwise */
	int nArg,                  /* Total number of given arguments */
	ph7_value **apArg          /* Method arguments */
	)
{
	ph7_value *aStack;
	VmInstr aInstr[2];
	int iCursor;
	int i;
	/* Create a new operand stack */
	aStack = VmNewOperandStack(&(*pVm),2/* Method name + Aux data */+nArg);
	if( aStack == 0 ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,
			"PH7 is running out of memory while invoking class method");
		return SXERR_MEM;
	}
	/* Fill the operand stack with the given arguments */
	for( i = 0 ; i < nArg ; i++ ){
		PH7_MemObjLoad(apArg[i],&aStack[i]);
		/*
		 * Symisc eXtension:
		 *  Parameters to [call_user_func()] can be passed by reference.
		 */
		aStack[i].nIdx = apArg[i]->nIdx;
	}
	iCursor = nArg + 1;
	if( pThis ){
		/* 
		 * Push the class instance so that the '$this' variable will be available.
		 */
		pThis->iRef++; /* Increment reference count */
		aStack[i].x.pOther = pThis; 
		aStack[i].iFlags = MEMOBJ_OBJ;
	}
	aStack[i].nIdx = SXU32_HIGH; /* Mark as constant */
	i++;
	/* Push method name */
	SyBlobReset(&aStack[i].sBlob);
	SyBlobAppend(&aStack[i].sBlob,(const void *)SyStringData(&pMethod->sVmName),SyStringLength(&pMethod->sVmName));
	aStack[i].iFlags = MEMOBJ_STRING;
	aStack[i].nIdx = SXU32_HIGH;
	/* Emit the CALL istruction */
	aInstr[0].iOp = PH7_OP_CALL;
	aInstr[0].iP1 = nArg; /* Total number of given arguments */
	aInstr[0].iP2 = 0;
	aInstr[0].p3  = 0;
	/* Emit the DONE instruction */
	aInstr[1].iOp = PH7_OP_DONE;
	aInstr[1].iP1 = 1;   /* Extract method return value */
	aInstr[1].iP2 = 0;
	aInstr[1].p3  = 0;
	/* Execute the method body (if available) */
	VmByteCodeExec(&(*pVm),aInstr,aStack,iCursor,pResult,0,TRUE);
	/* Clean up the mess left behind */
	SyMemBackendFree(&pVm->sAllocator,aStack);
	return PH7_OK;
}
/*
 * Call a user defined or foreign function where the name of the function
 * is stored in the pFunc parameter and the given arguments are stored
 * in the apArg[] array.
 * Return SXRET_OK if the function was successfuly called.Any other
 * return value indicates failure.
 */
PH7_PRIVATE sxi32 PH7_VmCallUserFunction(
	ph7_vm *pVm,       /* Target VM */
	ph7_value *pFunc,  /* Callback name */
	int nArg,          /* Total number of given arguments */
	ph7_value **apArg, /* Callback arguments */
	ph7_value *pResult /* Store callback return value here. NULL otherwise */
	)
{
	ph7_value *aStack;
	VmInstr aInstr[2];
	int i;
	if((pFunc->iFlags & (MEMOBJ_STRING|MEMOBJ_HASHMAP)) == 0 ){
		/* Don't bother processing,it's invalid anyway */
		if( pResult ){
			/* Assume a null return value */
			PH7_MemObjRelease(pResult);
		}
		return SXERR_INVALID;
	}
	if( pFunc->iFlags & MEMOBJ_HASHMAP ){
		/* Class method */
		ph7_hashmap *pMap = (ph7_hashmap *)pFunc->x.pOther;
		ph7_class_method *pMethod = 0;
		ph7_class_instance *pThis = 0;
		ph7_class *pClass = 0;
		ph7_value *pValue;
		sxi32 rc;
		if( pMap->nEntry < 2 /* Class name/instance + method name */){
			/* Empty hashmap,nothing to call */
			if( pResult ){
				/* Assume a null return value */
				PH7_MemObjRelease(pResult);
			}
			return SXRET_OK;
		}
		/* Extract the class name or an instance of it */
		pValue = (ph7_value *)SySetAt(&pVm->aMemObj,pMap->pFirst->nValIdx);
		if( pValue ){
			pClass = VmExtractClassFromValue(&(*pVm),pValue);
		}
		if( pClass == 0 ){
			/* No such class,return NULL */
			if( pResult ){
				PH7_MemObjRelease(pResult);
			}
			return SXRET_OK;
		}
		if( pValue->iFlags & MEMOBJ_OBJ ){
			/* Point to the class instance */
			pThis = (ph7_class_instance *)pValue->x.pOther;
		}
		/* Try to extract the method */
		pValue = (ph7_value *)SySetAt(&pVm->aMemObj,pMap->pFirst->pPrev->nValIdx);
		if( pValue ){
			if( (pValue->iFlags & MEMOBJ_STRING) && SyBlobLength(&pValue->sBlob) > 0 ){
				pMethod = PH7_ClassExtractMethod(pClass,(const char *)SyBlobData(&pValue->sBlob),
					SyBlobLength(&pValue->sBlob));
			}
		}		
		if( pMethod == 0 ){
			/* No such method,return NULL */
			if( pResult ){
				PH7_MemObjRelease(pResult);
			}
			return SXRET_OK;
		}
		/* Call the class method */
		rc = PH7_VmCallClassMethod(&(*pVm),pThis,pMethod,pResult,nArg,apArg);
		return rc;
	}
	/* Create a new operand stack */
	aStack = VmNewOperandStack(&(*pVm),1+nArg);
	if( aStack == 0 ){
		PH7_VmThrowError(&(*pVm),0,PH7_CTX_ERR,
			"PH7 is running out of memory while invoking user callback");
		if( pResult ){
			/* Assume a null return value */
			PH7_MemObjRelease(pResult);
		}
		return SXERR_MEM;
	}
	/* Fill the operand stack with the given arguments */
	for( i = 0 ; i < nArg ; i++ ){
		PH7_MemObjLoad(apArg[i],&aStack[i]);
		/* 
		 * Symisc eXtension:
		 *  Parameters to [call_user_func()] can be passed by reference.
		 */
		aStack[i].nIdx = apArg[i]->nIdx;
	}
	/* Push the function name */
	PH7_MemObjLoad(pFunc,&aStack[i]);
	aStack[i].nIdx = SXU32_HIGH; /* Mark as constant */
	/* Emit the CALL istruction */
	aInstr[0].iOp = PH7_OP_CALL;
	aInstr[0].iP1 = nArg; /* Total number of given arguments */
	aInstr[0].iP2 = 0;
	aInstr[0].p3  = 0;
	/* Emit the DONE instruction */
	aInstr[1].iOp = PH7_OP_DONE;
	aInstr[1].iP1 = 1;   /* Extract function return value if available */
	aInstr[1].iP2 = 0;
	aInstr[1].p3  = 0;
	/* Execute the function body (if available) */
	VmByteCodeExec(&(*pVm),aInstr,aStack,nArg,pResult,0,TRUE);
	/* Clean up the mess left behind */
	SyMemBackendFree(&pVm->sAllocator,aStack);
	return PH7_OK;
}
/*
 * Call a user defined or foreign function whith a varibale number
 * of arguments where the name of the function is stored in the pFunc
 * parameter.
 * Return SXRET_OK if the function was successfuly called.Any other
 * return value indicates failure.
 */
PH7_PRIVATE sxi32 PH7_VmCallUserFunctionAp(
	ph7_vm *pVm,       /* Target VM */
	ph7_value *pFunc,  /* Callback name */
	ph7_value *pResult,/* Store callback return value here. NULL otherwise */
	...                /* 0 (Zero) or more Callback arguments */ 
	)
{
	ph7_value *pArg;
	SySet aArg;
	va_list ap;
	sxi32 rc;
	SySetInit(&aArg,&pVm->sAllocator,sizeof(ph7_value *));
	/* Copy arguments one after one */
	va_start(ap,pResult);
	for(;;){
		pArg = va_arg(ap,ph7_value *);
		if( pArg == 0 ){
			break;
		}
		SySetPut(&aArg,(const void *)&pArg);
	}
	/* Call the core routine */
	rc = PH7_VmCallUserFunction(&(*pVm),pFunc,(int)SySetUsed(&aArg),(ph7_value **)SySetBasePtr(&aArg),pResult);
	/* Cleanup */
	SySetRelease(&aArg);
	return rc;
}
/*
 * value call_user_func(callable $callback[,value $parameter[, value $... ]])
 *  Call the callback given by the first parameter.
 * Parameter
 *  $callback
 *   The callable to be called.
 *  ...
 *    Zero or more parameters to be passed to the callback. 
 * Return
 *  Th return value of the callback, or FALSE on error. 
 */
static int vm_builtin_call_user_func(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value sResult; /* Store callback return value here */
	sxi32 rc;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	PH7_MemObjInit(pCtx->pVm,&sResult);
	sResult.nIdx = SXU32_HIGH; /* Mark as constant */
	/* Try to invoke the callback */
	rc = PH7_VmCallUserFunction(pCtx->pVm,apArg[0],nArg - 1,&apArg[1],&sResult);
	if( rc != SXRET_OK ){
		/* An error occured while invoking the given callback [i.e: not defined] */
		ph7_result_bool(pCtx,0); /* return false */
	}else{
		/* Callback result */
		ph7_result_value(pCtx,&sResult); /* Will make it's own copy */
	}
	PH7_MemObjRelease(&sResult);
	return PH7_OK;
}
/*
 * value call_user_func_array(callable $callback,array $param_arr)
 *  Call a callback with an array of parameters.
 * Parameter
 *  $callback
 *   The callable to be called.
 * $param_arr
 *  The parameters to be passed to the callback, as an indexed array.
 * Return
 *  Returns the return value of the callback, or FALSE on error.
 */
static int vm_builtin_call_user_func_array(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry; /* Current hashmap entry */
	ph7_value *pValue,sResult;/* Store callback return value here */
	ph7_hashmap *pMap;        /* Target hashmap */
	SySet aArg;               /* Arguments containers */
	sxi32 rc;
	sxu32 n;
	if( nArg < 2 || !ph7_value_is_array(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	PH7_MemObjInit(pCtx->pVm,&sResult);
	sResult.nIdx = SXU32_HIGH; /* Mark as constant */
	/* Initialize the arguments container */
	SySetInit(&aArg,&pCtx->pVm->sAllocator,sizeof(ph7_value *));
	/* Turn hashmap entries into callback arguments */
	pMap = (ph7_hashmap *)apArg[1]->x.pOther;
	pEntry = pMap->pFirst; /* First inserted entry */
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extract node value */
		if( (pValue = (ph7_value *)SySetAt(&pCtx->pVm->aMemObj,pEntry->nValIdx)) != 0 ){
			SySetPut(&aArg,(const void *)&pValue);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Try to invoke the callback */
	rc = PH7_VmCallUserFunction(pCtx->pVm,apArg[0],(int)SySetUsed(&aArg),(ph7_value **)SySetBasePtr(&aArg),&sResult);
	if( rc != SXRET_OK ){
		/* An error occured while invoking the given callback [i.e: not defined] */
		ph7_result_bool(pCtx,0); /* return false */
	}else{
		/* Callback result */
		ph7_result_value(pCtx,&sResult); /* Will make it's own copy */
	}
	/* Cleanup the mess left behind */
	PH7_MemObjRelease(&sResult);
	SySetRelease(&aArg);
	return PH7_OK;
}
/*
 * bool defined(string $name)
 *  Checks whether a given named constant exists.
 * Parameter:
 *  Name of the desired constant.
 * Return
 *  TRUE if the given constant exists.FALSE otherwise.
 */
static int vm_builtin_defined(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zName;
	int nLen = 0;
	int res = 0;
	if( nArg < 1 ){
		/* Missing constant name,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Missing constant name");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Extract constant name */
	zName = ph7_value_to_string(apArg[0],&nLen);
	/* Perform the lookup */
	if( nLen > 0 && SyHashGet(&pCtx->pVm->hConstant,(const void *)zName,(sxu32)nLen) != 0 ){
		/* Already defined */
		res = 1;
	}
	ph7_result_bool(pCtx,res);
	return SXRET_OK;
}
/*
 * Constant expansion callback used by the [define()] function defined
 * below.
 */
static void VmExpandUserConstant(ph7_value *pVal,void *pUserData)
{
	ph7_value *pConstantValue = (ph7_value *)pUserData;
	/* Expand constant value */
	PH7_MemObjStore(pConstantValue,pVal);
}
/*
 * bool define(string $constant_name,expression value)
 *  Defines a named constant at runtime.
 * Parameter:
 *  $constant_name
 *   The name of the constant
 *  $value
 *   Constant value
 * Return:
 *   TRUE on success,FALSE on failure.
 */
static int vm_builtin_define(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zName;  /* Constant name */
	ph7_value *pValue;  /* Duplicated constant value */
	int nLen = 0;       /* Name length */
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,throw a ntoice and return false */
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Missing constant name/value pair");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	if( !ph7_value_is_string(apArg[0]) ){
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Invalid constant name");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Extract constant name */
	zName = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Empty constant name");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Duplicate constant value */
	pValue = (ph7_value *)SyMemBackendPoolAlloc(&pCtx->pVm->sAllocator,sizeof(ph7_value));
	if( pValue == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Cannot register constant due to a memory failure");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Initialize the memory object */
	PH7_MemObjInit(pCtx->pVm,pValue);
	/* Register the constant */
	rc = ph7_create_constant(pCtx->pVm,zName,VmExpandUserConstant,pValue);
	if( rc != SXRET_OK ){
		SyMemBackendPoolFree(&pCtx->pVm->sAllocator,pValue);
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Cannot register constant due to a memory failure");
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	/* Duplicate constant value */
	PH7_MemObjStore(apArg[1],pValue);
	if( nArg == 3 && ph7_value_is_bool(apArg[2]) && ph7_value_to_bool(apArg[2]) ){
		/* Lower case the constant name */
		char *zCur = (char *)zName;
		while( zCur < &zName[nLen] ){
			if( (unsigned char)zCur[0] >= 0xc0 ){
				/* UTF-8 stream */
				zCur++;
				while( zCur < &zName[nLen] && (((unsigned char)zCur[0] & 0xc0) == 0x80) ){
					zCur++;
				}
				continue;
			}
			if( SyisUpper(zCur[0]) ){
				int c = SyToLower(zCur[0]);
				zCur[0] = (char)c;
			}
			zCur++;
		}
		/* Finally,register the constant */
		ph7_create_constant(pCtx->pVm,zName,VmExpandUserConstant,pValue);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return SXRET_OK;
}
/*
 * value constant(string $name)
 *  Returns the value of a constant
 * Parameter
 *  $name
 *    Name of the constant.
 * Return
 *  Constant value or NULL if not defined.
 */
static int vm_builtin_constant(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyHashEntry *pEntry;
	ph7_constant *pCons;
	const char *zName; /* Constant name */
	ph7_value sVal;    /* Constant value */
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Invallid argument,return NULL */
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Missing/Invalid constant name");
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Extract the constant name */
	zName = ph7_value_to_string(apArg[0],&nLen);
	/* Perform the query */
	pEntry = SyHashGet(&pCtx->pVm->hConstant,(const void *)zName,(sxu32)nLen);
	if( pEntry == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_NOTICE,"'%.*s': Undefined constant",nLen,zName);
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	PH7_MemObjInit(pCtx->pVm,&sVal);
	/* Point to the structure that describe the constant */
	pCons = (ph7_constant *)SyHashEntryGetUserData(pEntry);
	/* Extract constant value by calling it's associated callback */
	pCons->xExpand(&sVal,pCons->pUserData);
	/* Return that value */
	ph7_result_value(pCtx,&sVal);
	/* Cleanup */
	PH7_MemObjRelease(&sVal);
	return SXRET_OK;
}
/*
 * Hash walker callback used by the [get_defined_constants()] function
 * defined below.
 */
static int VmHashConstStep(SyHashEntry *pEntry,void *pUserData)
{
	ph7_value *pArray = (ph7_value *)pUserData;
	ph7_value sName;
	sxi32 rc;
	/* Prepare the constant name for insertion */
	PH7_MemObjInitFromString(pArray->pVm,&sName,0);
	PH7_MemObjStringAppend(&sName,(const char *)pEntry->pKey,pEntry->nKeyLen);
	/* Perform the insertion */
	rc = ph7_array_add_elem(pArray,0,&sName); /* Will make it's own copy */
	PH7_MemObjRelease(&sName);
	return rc;
}
/*
 * array get_defined_constants(void)
 *  Returns an associative array with the names of all defined
 *  constants.
 * Parameters
 *  NONE.
 * Returns
 *  Returns the names of all the constants currently defined.
 */
static int vm_builtin_get_defined_constants(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray;
	/* Create the array first*/
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Fill the array with the defined constants */
	SyHashForEach(&pCtx->pVm->hConstant,VmHashConstStep,pArray);
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	return SXRET_OK;
}
/*
 * Section:
 *  Output Control (OB) functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/* Forward declaration */	
static void VmObRestore(ph7_vm *pVm,VmObEntry *pEntry);												
/*
 * void ob_clean(void)
 *  This function discards the contents of the output buffer.
 *  This function does not destroy the output buffer like ob_end_clean() does.
 * Parameter
 *  None
 * Return
 *  No value is returned.
 */
static int vm_builtin_ob_clean(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	/* Peek the top most OB */
	pOb = (VmObEntry *)SySetPeek(&pVm->aOB);
	if( pOb ){
		SyBlobRelease(&pOb->sOB);
	}
	return PH7_OK;
}
/*
 * bool ob_end_clean(void)
 *  Clean (erase) the output buffer and turn off output buffering
 *  This function discards the contents of the topmost output buffer and turns
 *  off this output buffering. If you want to further process the buffer's contents
 *  you have to call ob_get_contents() before ob_end_clean() as the buffer contents
 *  are discarded when ob_end_clean() is called. 
 * Parameter
 *  None
 * Return
 *  Returns TRUE on success or FALSE on failure. Reasons for failure are first that you called
 *  the function without an active buffer or that for some reason a buffer could not be deleted
 * (possible for special buffer)
 */
static int vm_builtin_ob_end_clean(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	/* Pop the top most OB */
	pOb = (VmObEntry *)SySetPop(&pVm->aOB);
	if( pOb == 0){
		/* No such OB,return FALSE */
		ph7_result_bool(pCtx,0);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
	}else{
		/* Release */
		VmObRestore(pVm,pOb);
		/* Return true */
		ph7_result_bool(pCtx,1);
	}
	return PH7_OK;
}
/*
 * string ob_get_contents(void)
 *  Gets the contents of the output buffer without clearing it.
 * Parameter
 *  None
 * Return
 *  This will return the contents of the output buffer or FALSE, if output buffering isn't active.
 */
static int vm_builtin_ob_get_contents(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	/* Peek the top most OB */
	pOb = (VmObEntry *)SySetPeek(&pVm->aOB);
	if( pOb == 0 ){
		/* No active OB,return FALSE */
		ph7_result_bool(pCtx,0);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
	}else{
		/* Return contents */
		ph7_result_string(pCtx,(const char *)SyBlobData(&pOb->sOB),(int)SyBlobLength(&pOb->sOB));
	}	
	return PH7_OK;
}
/*
 * string ob_get_clean(void)
 * string ob_get_flush(void)
 *  Get current buffer contents and delete current output buffer.
 * Parameter
 *  None
 * Return
 *  This will return the contents of the output buffer or FALSE, if output buffering isn't active.
 */
static int vm_builtin_ob_get_clean(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	/* Pop the top most OB */
	pOb = (VmObEntry *)SySetPop(&pVm->aOB);
	if( pOb == 0 ){
		/* No active OB,return FALSE */
		ph7_result_bool(pCtx,0);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
	}else{
		/* Return contents */
		ph7_result_string(pCtx,(const char *)SyBlobData(&pOb->sOB),(int)SyBlobLength(&pOb->sOB)); /* Will make it's own copy */
		/* Release */
		VmObRestore(pVm,pOb);
	}	
	return PH7_OK;
}
/*
 * int ob_get_length(void)
 *  Return the length of the output buffer.
 * Parameter
 *  None
 * Return
 *  Returns the length of the output buffer contents or FALSE if no buffering is active.
 */
static int vm_builtin_ob_get_length(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	/* Peek the top most OB */
	pOb = (VmObEntry *)SySetPeek(&pVm->aOB);
	if( pOb == 0 ){
		/* No active OB,return FALSE */
		ph7_result_bool(pCtx,0);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
	}else{
		/* Return OB length */
		ph7_result_int64(pCtx,(ph7_int64)SyBlobLength(&pOb->sOB));
	}	
	return PH7_OK;
}
/*
 * int ob_get_level(void)
 *  Returns the nesting level of the output buffering mechanism.
 * Parameter
 *  None
 * Return
 *  Returns the level of nested output buffering handlers or zero if output buffering is not active. 
 */
static int vm_builtin_ob_get_level(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	int iNest;
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	/* Nesting level */
	iNest = (int)SySetUsed(&pVm->aOB);
	/* Return the nesting value */
	ph7_result_int(pCtx,iNest);
	return PH7_OK;
}
/*
 * Output Buffer(OB) default VM consumer routine.All VM output is now redirected
 * to a stackable internal buffer,until the user call [ob_get_clean(),ob_end_clean(),...].
 * Refer to the implementation of [ob_start()] for more information.
 */
static int VmObConsumer(const void *pData,unsigned int nDataLen,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	VmObEntry *pEntry;
	ph7_value sResult;
	/* Peek the top most entry */
	pEntry = (VmObEntry *)SySetPeek(&pVm->aOB);
	if( pEntry == 0 ){
		/* CAN'T HAPPEN */
		return PH7_OK;
	}
	PH7_MemObjInit(pVm,&sResult);
	if( ph7_value_is_callable(&pEntry->sCallback) && pVm->nObDepth < 15 ){
		ph7_value sArg,*apArg[2];
		/* Fill the first argument */
		PH7_MemObjInitFromString(pVm,&sArg,0);
		PH7_MemObjStringAppend(&sArg,(const char *)pData,nDataLen);
		apArg[0] = &sArg;
		/* Call the 'filter' callback */
		pVm->nObDepth++;
		PH7_VmCallUserFunction(pVm,&pEntry->sCallback,1,apArg,&sResult);
		pVm->nObDepth--;
		if( sResult.iFlags & MEMOBJ_STRING ){
			/* Extract the function result */
			pData = SyBlobData(&sResult.sBlob);
			nDataLen = SyBlobLength(&sResult.sBlob);
		}
		PH7_MemObjRelease(&sArg);
	}
	if( nDataLen > 0 ){
		/* Redirect the VM output to the internal buffer */
		SyBlobAppend(&pEntry->sOB,pData,nDataLen);
	}
	/* Release */
	PH7_MemObjRelease(&sResult);
	return PH7_OK;
}
/*
 * Restore the default consumer.
 * Refer to the implementation of [ob_end_clean()] for more
 * information.
 */
static void VmObRestore(ph7_vm *pVm,VmObEntry *pEntry)
{
	ph7_output_consumer *pCons = &pVm->sVmConsumer;
	if( SySetUsed(&pVm->aOB) < 1 ){
		/* No more stackable OB */
		pCons->xConsumer = pCons->xDef;
		pCons->pUserData = pCons->pDefData;
	}
	/* Release OB data */
	PH7_MemObjRelease(&pEntry->sCallback);
	SyBlobRelease(&pEntry->sOB);
}
/*
 * bool ob_start([ callback $output_callback] )
 * This function will turn output buffering on. While output buffering is active no output
 *  is sent from the script (other than headers), instead the output is stored in an internal
 *  buffer. 
 * Parameter
 *  $output_callback
 *   An optional output_callback function may be specified. This function takes a string 
 *   as a parameter and should return a string. The function will be called when the output
 *   buffer is flushed (sent) or cleaned (with ob_flush(), ob_clean() or similar function)
 *   or when the output buffer is flushed to the browser at the end of the request.
 *   When output_callback is called, it will receive the contents of the output buffer
 *   as its parameter and is expected to return a new output buffer as a result, which will
 *   be sent to the browser. If the output_callback is not a callable function, this function
 *   will return FALSE.
 *   If the callback function has two parameters, the second parameter is filled with
 *   a bit-field consisting of PHP_OUTPUT_HANDLER_START, PHP_OUTPUT_HANDLER_CONT 
 *   and PHP_OUTPUT_HANDLER_END.
 *   If output_callback returns FALSE original input is sent to the browser.
 *   The output_callback parameter may be bypassed by passing a NULL value. 
 * Return
 *   Returns TRUE on success or FALSE on failure.
 */
static int vm_builtin_ob_start(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry sOb;
	sxi32 rc;
	/* Initialize the OB entry */
	PH7_MemObjInit(pCtx->pVm,&sOb.sCallback);
	SyBlobInit(&sOb.sOB,&pVm->sAllocator);
	if( nArg > 0 && (apArg[0]->iFlags & (MEMOBJ_STRING|MEMOBJ_HASHMAP)) ){
		/* Save the callback name for later invocation */
		PH7_MemObjStore(apArg[0],&sOb.sCallback);
	}
	/* Push in the stack */
	rc = SySetPut(&pVm->aOB,(const void *)&sOb);
	if( rc != SXRET_OK ){
		PH7_MemObjRelease(&sOb.sCallback);
	}else{
		ph7_output_consumer *pCons = &pVm->sVmConsumer;
		/* Substitute the default VM consumer */
		if( pCons->xConsumer != VmObConsumer ){
			pCons->xDef = pCons->xConsumer;
			pCons->pDefData = pCons->pUserData;
			/* Install the new consumer */
			pCons->xConsumer = VmObConsumer;
			pCons->pUserData = pVm;
		}
	}
	ph7_result_bool(pCtx,rc == SXRET_OK);
	return PH7_OK;
}
/*
 * Flush Output buffer to the default VM output consumer.
 * Refer to the implementation of [ob_flush()] for more
 * information.
 */
static sxi32 VmObFlush(ph7_vm *pVm,VmObEntry *pEntry,int bRelease)
{
	SyBlob *pBlob = &pEntry->sOB;
	sxi32 rc;
	/* Flush contents */
	rc = PH7_OK;
	if( SyBlobLength(pBlob) > 0 ){
		/* Call the VM output consumer */
		rc = pVm->sVmConsumer.xDef(SyBlobData(pBlob),SyBlobLength(pBlob),pVm->sVmConsumer.pDefData);
		/* Increment VM output counter */
		pVm->nOutputLen += SyBlobLength(pBlob);
		if( rc != PH7_ABORT ){
			rc = PH7_OK;
		}
	}
	if( bRelease ){
		VmObRestore(&(*pVm),pEntry);
	}else{
		/* Reset the blob */
		SyBlobReset(pBlob);
	}
	return rc;
}
/*
 * void ob_flush(void)
 * void flush(void)
 *  Flush (send) the output buffer.
 * Parameter
 *  None
 * Return
 *  No return value.
 */
static int vm_builtin_ob_flush(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	sxi32 rc;
	/* Peek the top most OB entry */
	pOb = (VmObEntry *)SySetPeek(&pVm->aOB);
	if( pOb == 0 ){
		/* Empty stack,return immediately */
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		return PH7_OK;
	}
	/* Flush contents */
	rc = VmObFlush(pVm,pOb,FALSE);
	return rc;
}
/*
 * bool ob_end_flush(void)
 *  Flush (send) the output buffer and turn off output buffering.
 * Parameter
 *  None
 * Return
 *  Returns TRUE on success or FALSE on failure. Reasons for failure are first
 *  that you called the function without an active buffer or that for some reason
 *  a buffer could not be deleted (possible for special buffer). 
 */
static int vm_builtin_ob_end_flush(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	VmObEntry *pOb;
	sxi32 rc;
	/* Pop the top most OB entry */
	pOb = (VmObEntry *)SySetPop(&pVm->aOB);
	if( pOb == 0 ){
		/* Empty stack,return FALSE */
		ph7_result_bool(pCtx,0);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		return PH7_OK;
	}
	/* Flush contents */
	rc = VmObFlush(pVm,pOb,TRUE);
	/* Return true */
	ph7_result_bool(pCtx,1);
	return rc;
}
/*
 * void ob_implicit_flush([int $flag = true ])
 *  ob_implicit_flush() will turn implicit flushing on or off.
 *  Implicit flushing will result in a flush operation after every
 *  output call, so that explicit calls to flush() will no longer be needed. 
 * Parameter
 *  $flag
 *   TRUE to turn implicit flushing on, FALSE otherwise.
 * Return
 *   Nothing
 */
static int vm_builtin_ob_implicit_flush(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	/* NOTE: As of this version,this function is a no-op.
	 * PH7 is smart enough to flush it's internal buffer when appropriate.
	 */
	SXUNUSED(pCtx);
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	return PH7_OK;
}
/*
 * array ob_list_handlers(void)
 *  Lists all output handlers in use.
 * Parameter
 *  None
 * Return
 *  This will return an array with the output handlers in use (if any).
 */
static int vm_builtin_ob_list_handlers(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;	
	ph7_value *pArray;
	VmObEntry *aEntry;
	ph7_value sVal;
	sxu32 n;
	if( SySetUsed(&pVm->aOB) < 1 ){
		/* Empty stack,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		/* Out of memory,return NULL */
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	PH7_MemObjInit(pVm,&sVal);
	/* Point to the installed OB entries */
	aEntry = (VmObEntry *)SySetBasePtr(&pVm->aOB);
	/* Perform the requested operation */
	for( n = 0 ; n < SySetUsed(&pVm->aOB) ; n++ ){
		VmObEntry *pEntry = &aEntry[n];
		/* Extract handler name */
		SyBlobReset(&sVal.sBlob);
		if( pEntry->sCallback.iFlags & MEMOBJ_STRING ){
			/* Callback,dup it's name */
			SyBlobDup(&pEntry->sCallback.sBlob,&sVal.sBlob);
		}else if( pEntry->sCallback.iFlags & MEMOBJ_HASHMAP ){
			SyBlobAppend(&sVal.sBlob,"Class Method",sizeof("Class Method")-1);
		}else{
			SyBlobAppend(&sVal.sBlob,"default output handler",sizeof("default output handler")-1);
		}
		sVal.iFlags = MEMOBJ_STRING;
		/* Perform the insertion */
		ph7_array_add_elem(pArray,0/* Automatic index assign */,&sVal /* Will make it's own copy */);
	}
	PH7_MemObjRelease(&sVal);
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * Section:
 *  Random numbers/string generators.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * Generate a random 32-bit unsigned integer.
 * PH7 use it's own private PRNG which is based on the one
 * used by te SQLite3 library.
 */
PH7_PRIVATE sxu32 PH7_VmRandomNum(ph7_vm *pVm)
{
	sxu32 iNum;
	SyRandomness(&pVm->sPrng,(void *)&iNum,sizeof(sxu32));
	return iNum;
}
/*
 * Generate a random string (English Alphabet) of length nLen.
 * Note that the generated string is NOT null terminated.
 * PH7 use it's own private PRNG which is based on the one used
 * by te SQLite3 library.
 */
PH7_PRIVATE void PH7_VmRandomString(ph7_vm *pVm,char *zBuf,int nLen)
{
	static const char zBase[] = {"abcdefghijklmnopqrstuvwxyz"}; /* English Alphabet */
	int i;
	/* Generate a binary string first */
	SyRandomness(&pVm->sPrng,zBuf,(sxu32)nLen);
	/* Turn the binary string into english based alphabet */
	for( i = 0 ; i < nLen ; ++i ){
		 zBuf[i] = zBase[zBuf[i] % (sizeof(zBase)-1)];
	 }
}
/*
 * int rand()
 * int mt_rand() 
 * int rand(int $min,int $max)
 * int mt_rand(int $min,int $max)
 *  Generate a random (unsigned 32-bit) integer.
 * Parameter
 *  $min
 *    The lowest value to return (default: 0)
 *  $max
 *   The highest value to return (default: getrandmax())
 * Return
 *   A pseudo random value between min (or 0) and max (or getrandmax(), inclusive).
 * Note:
 *  PH7 use it's own private PRNG which is based on the one used
 *  by te SQLite3 library.
 */
static int vm_builtin_rand(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	sxu32 iNum;
	/* Generate the random number */
	iNum = PH7_VmRandomNum(pCtx->pVm);
	if( nArg > 1 ){
		sxu32 iMin,iMax;
		iMin = (sxu32)ph7_value_to_int(apArg[0]);
		iMax = (sxu32)ph7_value_to_int(apArg[1]);
		if( iMin < iMax ){
			sxu32 iDiv = iMax+1-iMin;
			if( iDiv > 0 ){
				iNum = (iNum % iDiv)+iMin;
			}
		}else if(iMax > 0 ){
			iNum %= iMax;
		}
	}
	/* Return the number */
	ph7_result_int64(pCtx,(ph7_int64)iNum);
	return SXRET_OK;
}
/*
 * int getrandmax(void)
 * int mt_getrandmax(void)
 * int rc4_getrandmax(void)
 *   Show largest possible random value
 * Return
 *  The largest possible random value returned by rand() which is in
 *  this implementation 0xFFFFFFFF.
 * Note:
 *  PH7 use it's own private PRNG which is based on the one used
 *  by te SQLite3 library.
 */
static int vm_builtin_getrandmax(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	ph7_result_int64(pCtx,SXU32_HIGH);
	return SXRET_OK;
}
/*
 * string rand_str()
 * string rand_str(int $len)
 *  Generate a random string (English alphabet).
 * Parameter
 *  $len
 *    Length of the desired string (default: 16,Min: 1,Max: 1024)
 * Return
 *   A pseudo random string.
 * Note:
 *  PH7 use it's own private PRNG which is based on the one used
 *  by te SQLite3 library.
 *  This function is a symisc extension.
 */
static int vm_builtin_rand_str(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	char zString[1024];
	int iLen = 0x10;
	if( nArg > 0 ){
		/* Get the desired length */
		iLen = ph7_value_to_int(apArg[0]);
		if( iLen < 1 || iLen > 1024 ){
			/* Default length */
			iLen = 0x10;
		}
	}
	/* Generate the random string */
	PH7_VmRandomString(pCtx->pVm,zString,iLen);
	/* Return the generated string */
	ph7_result_string(pCtx,zString,iLen); /* Will make it's own copy */
	return SXRET_OK;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
#if !defined(PH7_DISABLE_HASH_FUNC)
/* Unique ID private data */
struct unique_id_data
{
	ph7_context *pCtx; /* Call context */
	int entropy;       /* TRUE if the more_entropy flag is set */
};
/*
 * Binary to hex consumer callback.
 * This callback is the default consumer used by [uniqid()] function
 * defined below.
 */
static int HexConsumer(const void *pData,unsigned int nLen,void *pUserData)
{
	struct unique_id_data *pUniq = (struct unique_id_data *)pUserData;
	sxu32 nBuflen;
	/* Extract result buffer length */
	nBuflen = ph7_context_result_buf_length(pUniq->pCtx);
	if( nBuflen > 12 && !pUniq->entropy ){
			/* 
			 * If the more_entropy flag is not set,then the returned
			 * string will be 13 characters long
			 */
		return SXERR_ABORT;
	}
	if( nBuflen > 22 ){
		return SXERR_ABORT;
	}
	/* Safely Consume the hex stream */
	ph7_result_string(pUniq->pCtx,(const char *)pData,(int)nLen);
	return SXRET_OK;
}
/*
 * string uniqid([string $prefix = "" [, bool $more_entropy = false]])
 *  Generate a unique ID
 * Parameter
 * $prefix
 *  Append this prefix to the generated unique ID.
 *  With an empty prefix, the returned string will be 13 characters long.
 *  If more_entropy is TRUE, it will be 23 characters.
 * $more_entropy
 *  If set to TRUE, uniqid() will add additional entropy which increases the likelihood 
 *  that the result will be unique.
 * Return
 *  Returns the unique identifier, as a string.
 */
static int vm_builtin_uniqid(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	struct unique_id_data sUniq;
	unsigned char zDigest[20]; 
	ph7_vm *pVm = pCtx->pVm;
	const char *zPrefix;
	SHA1Context sCtx;
	char zRandom[7];
	int nPrefix;
	int entropy;
	/* Generate a random string first */
	PH7_VmRandomString(pVm,zRandom,(int)sizeof(zRandom));
	/* Initialize fields */
	zPrefix = 0;
	nPrefix = 0;
	entropy = 0;
	if( nArg > 0 ){
		/* Append this prefix to the generated unqiue ID */
		zPrefix = ph7_value_to_string(apArg[0],&nPrefix);
		if( nArg > 1 ){
			entropy = ph7_value_to_bool(apArg[1]);
		}
	}
	SHA1Init(&sCtx);
	/* Generate the random ID */
	if( nPrefix > 0 ){
		SHA1Update(&sCtx,(const unsigned char *)zPrefix,(unsigned int)nPrefix);
	}
	/* Append the random ID */
	SHA1Update(&sCtx,(const unsigned char *)&pVm->unique_id,sizeof(int));
	/* Append the random string */
	SHA1Update(&sCtx,(const unsigned char *)zRandom,sizeof(zRandom));
	/* Increment the number */
	pVm->unique_id++;
	SHA1Final(&sCtx,zDigest);
	/* Hexify the digest */
	sUniq.pCtx = pCtx;
	sUniq.entropy = entropy;
	SyBinToHexConsumer((const void *)zDigest,sizeof(zDigest),HexConsumer,&sUniq);
	/* All done */
	return PH7_OK;
}
#endif /* PH7_DISABLE_HASH_FUNC */
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * Section:
 *  Language construct implementation as foreign functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * void echo($string...)
 *  Output one or more messages.
 * Parameters
 *  $string
 *   Message to output.
 * Return
 *  NULL.
 */
static int vm_builtin_echo(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zData;
	int nDataLen = 0;
	ph7_vm *pVm;
	int i,rc;
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Output */
	for( i = 0 ; i < nArg ; ++i ){
		zData = ph7_value_to_string(apArg[i],&nDataLen);
		if( nDataLen > 0 ){
			rc = pVm->sVmConsumer.xConsumer((const void *)zData,(unsigned int)nDataLen,pVm->sVmConsumer.pUserData);
			if( pVm->sVmConsumer.xConsumer != VmObConsumer ){
				/* Increment output length */
				pVm->nOutputLen += nDataLen;
			}
			if( rc == SXERR_ABORT ){
				/* Output consumer callback request an operation abort */
				return PH7_ABORT;
			}
		}
	}
	return SXRET_OK;
}
/*
 * int print($string...)
 *  Output one or more messages.
 * Parameters
 *  $string
 *   Message to output.
 * Return
 *  1 always.
 */
static int vm_builtin_print(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zData;
	int nDataLen = 0;
	ph7_vm *pVm;
	int i,rc;
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Output */
	for( i = 0 ; i < nArg ; ++i ){
		zData = ph7_value_to_string(apArg[i],&nDataLen);
		if( nDataLen > 0 ){
			rc = pVm->sVmConsumer.xConsumer((const void *)zData,(unsigned int)nDataLen,pVm->sVmConsumer.pUserData);
			if( pVm->sVmConsumer.xConsumer != VmObConsumer ){
				/* Increment output length */
				pVm->nOutputLen += nDataLen;
			}
			if( rc == SXERR_ABORT ){
				/* Output consumer callback request an operation abort */
				return PH7_ABORT;
			}
		}
	}
	/* Return 1 */
	ph7_result_int(pCtx,1);
	return SXRET_OK;
}
/*
 * void exit(string $msg)
 * void exit(int $status)
 * void die(string $ms)
 * void die(int $status)
 *   Output a message and terminate program execution.
 * Parameter
 *  If status is a string, this function prints the status just before exiting.
 *  If status is an integer, that value will be used as the exit status 
 *  and not printed
 * Return
 *  NULL
 */
static int vm_builtin_exit(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg > 0 ){
		if( ph7_value_is_string(apArg[0]) ){
			const char *zData;
			int iLen = 0;
			/* Print exit message */
			zData = ph7_value_to_string(apArg[0],&iLen);
			ph7_context_output(pCtx,zData,iLen);
		}else if(ph7_value_is_int(apArg[0]) ){
			sxi32 iExitStatus;
			/* Record exit status code */
			iExitStatus = ph7_value_to_int(apArg[0]);
			pCtx->pVm->iExitStatus = iExitStatus;
		}
	}
	/* Abort processing immediately */
	return PH7_ABORT;
}
/*
 * bool isset($var,...)
 *  Finds out whether a variable is set.
 * Parameters
 *  One or more variable to check.
 * Return
 *  1 if var exists and has value other than NULL, 0 otherwise.
 */
static int vm_builtin_isset(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pObj;
	int res = 0;
	int i;
	if( nArg < 1 ){
		/* Missing arguments,return false */
		ph7_result_bool(pCtx,res);
		return SXRET_OK;
	}
	/* Iterate over available arguments */
	for( i = 0 ; i < nArg ; ++i ){
		pObj = apArg[i];
		if( pObj->nIdx == SXU32_HIGH ){
			if( (pObj->iFlags & MEMOBJ_NULL) == 0 ){
				/* Not so fatal,Throw a warning */
				ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a variable not a constant");
			}
		}
		res = (pObj->iFlags & MEMOBJ_NULL) ? 0 : 1;
		if( !res ){
			/* Variable not set,return FALSE */
			ph7_result_bool(pCtx,0);
			return SXRET_OK;
		}
	}
	/* All given variable are set,return TRUE */
	ph7_result_bool(pCtx,1);
	return SXRET_OK;
}
/*
 * Unset a memory object [i.e: a ph7_value],remove it from the current
 * frame,the reference table and discard it's contents.
 * This function never fail and always return SXRET_OK.
 */
PH7_PRIVATE sxi32 PH7_VmUnsetMemObj(ph7_vm *pVm,sxu32 nObjIdx,int bForce)
{
	ph7_value *pObj;
	VmRefObj *pRef;
	pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nObjIdx);
	if( pObj ){
		/* Release the object */
		PH7_MemObjRelease(pObj);
	}
	/* Remove old reference links */
	pRef = VmRefObjExtract(&(*pVm),nObjIdx);
	if( pRef ){
		sxi32 iFlags = pRef->iFlags;
		/* Unlink from the reference table */
		VmRefObjUnlink(&(*pVm),pRef);
		if( (bForce == TRUE) || (iFlags & VM_REF_IDX_KEEP) == 0 ){
			VmSlot sFree;	
			/* Restore to the free list */
			sFree.nIdx = nObjIdx;
			sFree.pUserData = 0;
			SySetPut(&pVm->aFreeObj,(const void *)&sFree);
		}
	}	
	return SXRET_OK;
}
/*
 * void unset($var,...)
 *   Unset one or more given variable.
 * Parameters
 *  One or more variable to unset.
 * Return
 *  Nothing.
 */
static int vm_builtin_unset(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pObj;
	ph7_vm *pVm;
	int i;
	/* Point to the target VM */
	pVm = pCtx->pVm;
	/* Iterate and unset */
	for( i = 0 ; i < nArg ; ++i ){
		pObj = apArg[i];
		if( pObj->nIdx == SXU32_HIGH ){
			if( (pObj->iFlags & MEMOBJ_NULL) == 0 ){
				/* Throw an error */
				ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a variable not a constant");
			}
		}else{
			sxu32 nIdx = pObj->nIdx;
			/* TICKET 1433-35: Protect the $GLOBALS array from deletion */
			if( nIdx != pVm->nGlobalIdx ){				
				PH7_VmUnsetMemObj(&(*pVm),nIdx,FALSE);
			}
		}
	}
	return SXRET_OK;
}
/*
 * Hash walker callback used by the [get_defined_vars()] function.
 */
static sxi32 VmHashVarWalker(SyHashEntry *pEntry,void *pUserData)
{
	ph7_value *pArray = (ph7_value *)pUserData;
	ph7_vm *pVm = pArray->pVm;
	ph7_value *pObj;
	sxu32 nIdx;
	/* Extract the memory object */
	nIdx = SX_PTR_TO_INT(pEntry->pUserData);
	pObj = (ph7_value *)SySetAt(&pVm->aMemObj,nIdx);
	if( pObj ){
		if( (pObj->iFlags & MEMOBJ_HASHMAP) == 0 || (ph7_hashmap *)pObj->x.pOther != pVm->pGlobal ){
			if( pEntry->nKeyLen > 0 ){
				SyString sName;
				ph7_value sKey;
				/* Perform the insertion */
				SyStringInitFromBuf(&sName,pEntry->pKey,pEntry->nKeyLen);
				PH7_MemObjInitFromString(pVm,&sKey,&sName);
				ph7_array_add_elem(pArray,&sKey/*Will make it's own copy*/,pObj);
				PH7_MemObjRelease(&sKey);
			}
		}
	}
	return SXRET_OK;
}
/*
 * array get_defined_vars(void)
 *  Returns an array of all defined variables.
 * Parameter
 *  None
 * Return
 *  An array with all the variables defined in the current scope.
 */
static int vm_builtin_get_defined_vars(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pArray;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
 	if( pArray == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Superglobals first */
	SyHashForEach(&pVm->hSuper,VmHashVarWalker,pArray);
	/* Then variable defined in the current frame */
	SyHashForEach(&pVm->pFrame->hVar,VmHashVarWalker,pArray);
	/* Finally,return the created array */
	ph7_result_value(pCtx,pArray);
	return SXRET_OK;
}
/*
 * bool gettype($var)
 *  Get the type of a variable
 * Parameters
 *   $var
 *    The variable being type checked.
 * Return
 *   String representation of the given variable type.
 */
static int vm_builtin_gettype(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zType = "Empty";
	if( nArg > 0 ){
		zType = PH7_MemObjTypeDump(apArg[0]);
	}
	/* Return the variable type */
	ph7_result_string(pCtx,zType,-1/*Compute length automatically*/);
	return SXRET_OK;
}
/*
 * string get_resource_type(resource $handle)
 *  This function gets the type of the given resource.
 * Parameters
 *  $handle
 *  The evaluated resource handle.
 * Return
 *  If the given handle is a resource, this function will return a string 
 *  representing its type. If the type is not identified by this function
 *  the return value will be the string Unknown.
 *  This function will return FALSE and generate an error if handle
 *  is not a resource.
 */
static int vm_builtin_get_resource_type(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE*/
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	ph7_result_string_format(pCtx,"resID_%#x",apArg[0]->x.pOther);
	return SXRET_OK;
}
/*
 * void var_dump(expression,....)
 *   var_dump � Dumps information about a variable
 * Parameters
 *   One or more expression to dump.
 * Returns
 *  Nothing.
 */
static int vm_builtin_var_dump(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyBlob sDump; /* Generated dump is stored here */
	int i;
	SyBlobInit(&sDump,&pCtx->pVm->sAllocator);
	/* Dump one or more expressions */
	for( i = 0 ; i < nArg ; i++ ){
		ph7_value *pObj = apArg[i];
		/* Reset the working buffer */
		SyBlobReset(&sDump);
		/* Dump the given expression */
		PH7_MemObjDump(&sDump,pObj,TRUE,0,0,0);
		/* Output */
		if( SyBlobLength(&sDump) > 0 ){
			ph7_context_output(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump));
		}
	}
	/* Release the working buffer */
	SyBlobRelease(&sDump);
	return SXRET_OK;
}
/*
 * string/bool print_r(expression,[bool $return = FALSE])
 *   print-r - Prints human-readable information about a variable 
 * Parameters
 *   expression: Expression to dump
 *   return : If you would like to capture the output of print_r() use
 *            the return parameter. When this parameter is set to TRUE
 *            print_r() will return the information rather than print it.
 * Return
 *  When the return parameter is TRUE, this function will return a string.
 *  Otherwise, the return value is TRUE.
 */
static int vm_builtin_print_r(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int ret_string = 0;
	SyBlob sDump;
	if( nArg < 1 ){
		/* Nothing to output,return FALSE */
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	SyBlobInit(&sDump,&pCtx->pVm->sAllocator);
	if ( nArg > 1 ){
		/* Where to redirect output */
		ret_string = ph7_value_to_bool(apArg[1]);
	}
	/* Generate dump */
	PH7_MemObjDump(&sDump,apArg[0],FALSE,0,0,0);
	if( !ret_string ){
		/* Output dump */
		ph7_context_output(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump));
		/* Return true */
		ph7_result_bool(pCtx,1);
	}else{
		/* Generated dump as return value */
		ph7_result_string(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump));
	}
	/* Release the working buffer */
	SyBlobRelease(&sDump);
	return SXRET_OK;
}
/*
 * string/null var_export(expression,[bool $return = FALSE])
 * Same job as print_r. (see coment above)
 */
static int vm_builtin_var_export(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int ret_string = 0;
	SyBlob sDump;      /* Dump is stored in this BLOB */
	if( nArg < 1 ){
		/* Nothing to output,return FALSE */
		ph7_result_bool(pCtx,0);
		return SXRET_OK;
	}
	SyBlobInit(&sDump,&pCtx->pVm->sAllocator);
	if ( nArg > 1 ){
		/* Where to redirect output */
		ret_string = ph7_value_to_bool(apArg[1]);
	}
	/* Generate dump */
	PH7_MemObjDump(&sDump,apArg[0],FALSE,0,0,0);
	if( !ret_string ){
		/* Output dump */
		ph7_context_output(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump));
		/* Return NULL */
		ph7_result_null(pCtx);
	}else{
		/* Generated dump as return value */
		ph7_result_string(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump));
	}
	/* Release the working buffer */
	SyBlobRelease(&sDump);
	return SXRET_OK;
}
/*
 * int/bool assert_options(int $what [, mixed $value ])
 *  Set/get the various assert flags.
 * Parameter
 * $what
 *   ASSERT_ACTIVE          Enable assert() evaluation
 *   ASSERT_WARNING         Issue a warning for each failed assertion
 *   ASSERT_BAIL            Terminate execution on failed assertions
 *   ASSERT_QUIET_EVAL      Not used
 *   ASSERT_CALLBACK        Callback to call on failed assertions
 * $value
 *   An optional new value for the option.
 * Return
 *  Old setting on success or FALSE on failure. 
 */
static int vm_builtin_assert_options(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	int iOld,iNew,iValue; 
	if( nArg < 1 || !ph7_value_is_int(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Save old assertion flags */
	iOld = pVm->iAssertFlags;
	/* Extract the new flags */
	iNew = ph7_value_to_int(apArg[0]);
	if( iNew == PH7_ASSERT_DISABLE ){
		pVm->iAssertFlags &= ~PH7_ASSERT_DISABLE;
		if( nArg > 1 ){
			iValue = !ph7_value_to_bool(apArg[1]);
			if( iValue ){
				/* Disable assertion */
				pVm->iAssertFlags |= PH7_ASSERT_DISABLE;
			}
		}
	}else if( iNew == PH7_ASSERT_WARNING ){
		pVm->iAssertFlags &= ~PH7_ASSERT_WARNING;
		if( nArg > 1 ){
			iValue = ph7_value_to_bool(apArg[1]);
			if( iValue ){
				/* Issue a warning for each failed assertion */
				pVm->iAssertFlags |= PH7_ASSERT_WARNING;
			}
		}
	}else if( iNew == PH7_ASSERT_BAIL ){
		pVm->iAssertFlags &= ~PH7_ASSERT_BAIL;
		if( nArg > 1 ){
			iValue = ph7_value_to_bool(apArg[1]);
			if( iValue ){
				/* Terminate execution on failed assertions */
				pVm->iAssertFlags |= PH7_ASSERT_BAIL;
			}
		}
	}else if( iNew == PH7_ASSERT_CALLBACK ){
		pVm->iAssertFlags &= ~PH7_ASSERT_CALLBACK;
		if( nArg > 1 && ph7_value_is_callable(apArg[1]) ){
			/* Callback to call on failed assertions */
			PH7_MemObjStore(apArg[1],&pVm->sAssertCallback);
			pVm->iAssertFlags |= PH7_ASSERT_CALLBACK;
		}
	}
	/* Return the old flags */
	ph7_result_int(pCtx,iOld);
	return PH7_OK;
}
/*
 * bool assert(mixed $assertion)
 *  Checks if assertion is FALSE.
 * Parameter
 *  $assertion
 *    The assertion to test.
 * Return
 *  FALSE if the assertion is false, TRUE otherwise.
 */
static int vm_builtin_assert(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pAssert;
	int iFlags,iResult; 
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	iFlags = pVm->iAssertFlags;
	if( iFlags & PH7_ASSERT_DISABLE ){
		/* Assertion is disabled,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pAssert = apArg[0];
	iResult = 1; /* cc warning */
	if( pAssert->iFlags & MEMOBJ_STRING ){
		SyString sChunk;
		SyStringInitFromBuf(&sChunk,SyBlobData(&pAssert->sBlob),SyBlobLength(&pAssert->sBlob));
		if( sChunk.nByte > 0 ){
			VmEvalChunk(pVm,pCtx,&sChunk,PH7_PHP_ONLY|PH7_PHP_EXPR,FALSE);
			/* Extract evaluation result */
			iResult = ph7_value_to_bool(pCtx->pRet);
		}else{
			iResult = 0;
		}
	}else{
		/* Perform a boolean cast */
		iResult = ph7_value_to_bool(apArg[0]);
	}
	if( !iResult ){
		/* Assertion failed */
		if( iFlags & PH7_ASSERT_CALLBACK ){
			static const SyString sFileName = { ":Memory", sizeof(":Memory") - 1};
			ph7_value sFile,sLine;
			ph7_value *apCbArg[3];
			SyString *pFile;
			/* Extract the processed script */
			pFile = (SyString *)SySetPeek(&pVm->aFiles);
			if( pFile == 0 ){
				pFile = (SyString *)&sFileName;
			}
			/* Invoke the callback */
			PH7_MemObjInitFromString(pVm,&sFile,pFile);
			PH7_MemObjInitFromInt(pVm,&sLine,0);
			apCbArg[0] = &sFile;
			apCbArg[1] = &sLine;
			apCbArg[2] = pAssert;
			PH7_VmCallUserFunction(pVm,&pVm->sAssertCallback,3,apCbArg,0);
			/* Clean-up the mess left behind */
			PH7_MemObjRelease(&sFile);
			PH7_MemObjRelease(&sLine);
		}
		if( iFlags & PH7_ASSERT_WARNING ){
			/* Emit a warning */
			ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Assertion failed");
		}
		if( iFlags & PH7_ASSERT_BAIL ){
			/* Abort VM execution immediately */
			return PH7_ABORT;
		}
	}
	/* Assertion result */
	ph7_result_bool(pCtx,iResult);
	return PH7_OK;
}
/*
 * Section:
 *  Error reporting functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * bool trigger_error(string $error_msg[,int $error_type = E_USER_NOTICE ])
 *  Generates a user-level error/warning/notice message.
 * Parameters
 *  $error_msg
 *   The designated error message for this error. It's limited to 1024 characters
 *   in length. Any additional characters beyond 1024 will be truncated.
 * $error_type
 *  The designated error type for this error. It only works with the E_USER family
 *  of constants, and will default to E_USER_NOTICE.
 * Return
 *  This function returns FALSE if wrong error_type is specified, TRUE otherwise.
 */
static int vm_builtin_trigger_error(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int nErr = PH7_CTX_NOTICE;
	int rc = PH7_OK;
	if( nArg > 0 ){
		const char *zErr;
		int nLen;
		/* Extract the error message */
		zErr = ph7_value_to_string(apArg[0],&nLen);
		if( nArg > 1 ){
			/* Extract the error type */
			nErr = ph7_value_to_int(apArg[1]);
			switch( nErr ){
			case 1:   /* E_ERROR */
			case 16:  /* E_CORE_ERROR */
			case 64:  /* E_COMPILE_ERROR */
			case 256: /* E_USER_ERROR */
				nErr = PH7_CTX_ERR;
				rc = PH7_ABORT; /* Abort processing immediately */
				break;
			case 2:   /* E_WARNING */
			case 32:  /* E_CORE_WARNING */
			case 123: /* E_COMPILE_WARNING */
			case 512: /* E_USER_WARNING */
				nErr = PH7_CTX_WARNING;
				break;
			default:
				nErr = PH7_CTX_NOTICE;
				break;
			}
		}
		/* Report error */
		ph7_context_throw_error_format(pCtx,nErr,"%.*s",nLen,zErr);
		/* Return true */
		ph7_result_bool(pCtx,1);
	}else{
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
	}
	return rc;
}
/*
 * int error_reporting([int $level])
 *  Sets which PHP errors are reported.
 * Parameters
 *  $level
 *   The new error_reporting level. It takes on either a bitmask, or named constants.
 *   Using named constants is strongly encouraged to ensure compatibility for future versions.
 *   As error levels are added, the range of integers increases, so older integer-based error
 *   levels will not always behave as expected.
 *   The available error level constants and the actual meanings of these error levels are described
 *   in the predefined constants.
 * Return
 *   Returns the old error_reporting level or the current level if no level
 *   parameter is given. 
 */
static int vm_builtin_error_reporting(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	int nOld;
	/* Extract the old reporting level */
	nOld = pVm->bErrReport ? 32767 /* E_ALL */ : 0;
	if( nArg > 0 ){
		int nNew;
		/* Extract the desired error reporting level */
		nNew = ph7_value_to_int(apArg[0]);
		if( !nNew ){
			/* Do not report errors at all */
			pVm->bErrReport = 0;
		}else{
			/* Report all errors */
			pVm->bErrReport = 1;
		}
	}
	/* Return the old level */
	ph7_result_int(pCtx,nOld);
	return PH7_OK;
}
/*
 * bool error_log(string $message[,int $message_type = 0 [,string $destination[,string $extra_headers]]])
 *  Send an error message somewhere.
 * Parameter
 *  $message
 *   The error message that should be logged.
 *  $message_type
 *   Says where the error should go. The possible message types are as follows:
 *    0  message is sent to PHP's system logger, using the Operating System's system logging mechanism
 *       or a file, depending on what the error_log configuration directive is set to.
 *       This is the default option.
 *    1 message is sent by email to the address in the destination parameter.
 *      This is the only message type where the fourth parameter, extra_headers is used.
 *    2  No longer an option.
 *    3  message is appended to the file destination. A newline is not automatically added
 *       to the end of the message string.
 *    4  message is sent directly to the SAPI logging handler.
 *  $destination
 *   The destination. Its meaning depends on the message_type parameter as described above.
 *  $extra_headers
 *   The extra headers. It's used when the message_type parameter is set to 1
 * Return
 *  TRUE on success or FALSE on failure. 
 * NOTE:
 *  Actually,PH7 does not care about the given parameters,all this function does
 *  is to invoke any user callback registered using the PH7_VM_CONFIG_ERR_LOG_HANDLER
 *  configuration directive (refer to the official documentation for more information).
 *  Otherwise this function is no-op.
 */
static int vm_builtin_error_log(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zMessage,*zDest,*zHeader;
	ph7_vm *pVm = pCtx->pVm;
	int iType = 0;
	if( nArg < 1 ){
		/* Missing log message,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( pVm->xErrLog  ){
		/* Invoke the user callback */
		zMessage = ph7_value_to_string(apArg[0],0);
		zDest = zHeader = ""; /* Empty string */
		if( nArg > 1 ){
			iType = ph7_value_to_int(apArg[1]);
			if( nArg > 2 ){
				zDest = ph7_value_to_string(apArg[2],0);
				if( nArg > 3 ){
					zHeader = ph7_value_to_string(apArg[3],0);
				}
			}
		}
		pVm->xErrLog(zMessage,iType,zDest,zHeader);
	}
	/* Retun TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool restore_exception_handler(void) 
 *  Restores the previously defined exception handler function.
 * Parameter
 *  None
 * Return
 *  TRUE if the exception handler is restored.FALSE otherwise
 */
static int vm_builtin_restore_exception_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pOld,*pNew;
	/* Point to the old and the new handler */
	pOld = &pVm->aExceptionCB[0];
	pNew = &pVm->aExceptionCB[1];
	if( pOld->iFlags & MEMOBJ_NULL ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* No installed handler,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Copy the old handler */
	PH7_MemObjStore(pOld,pNew);
	PH7_MemObjRelease(pOld);
	/* Return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * callable set_exception_handler(callable $exception_handler)
 *  Sets a user-defined exception handler function.
 *  Sets the default exception handler if an exception is not caught within a try/catch block.
 * NOTE
 *  Execution will NOT stop after the exception_handler calls for example die/exit unlike
 *  the satndard PHP engine.
 * Parameters
 *  $exception_handler
 *   Name of the function to be called when an uncaught exception occurs.
 *   This handler function needs to accept one parameter, which will be the exception object
 *   that was thrown.
 *  Note:
 *   NULL may be passed instead, to reset this handler to its default state. 
 * Return
 *  Returns the name of the previously defined exception handler, or NULL on error.
 *  If no previous handler was defined, NULL is also returned. If NULL is passed
 *  resetting the handler to its default state, TRUE is returned. 
 */
static int vm_builtin_set_exception_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pOld,*pNew;
	/* Point to the old and the new handler */
	pOld = &pVm->aExceptionCB[0];
	pNew = &pVm->aExceptionCB[1];
	/* Return the old handler */
	ph7_result_value(pCtx,pOld); /* Will make it's own copy */
	if( nArg > 0 ){
		if( !ph7_value_is_callable(apArg[0])) {
			/* Not callable,return TRUE (As requested by the PHP specification) */
			PH7_MemObjRelease(pNew);
			ph7_result_bool(pCtx,1);
		}else{
			PH7_MemObjStore(pNew,pOld);
			/* Install the new handler */
			PH7_MemObjStore(apArg[0],pNew);
		}
	}
	return PH7_OK;
}
/*
 * bool restore_error_handler(void) 
 *  THIS FUNCTION IS A NO-OP IN THE CURRENT RELEASE OF THE PH7 ENGINE.
 * Parameters:
 *  None.
 * Return
 *  Always TRUE.
 */
static int vm_builtin_restore_error_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pOld,*pNew;
	/* Point to the old and the new handler */
	pOld = &pVm->aErrCB[0];
	pNew = &pVm->aErrCB[1];
	if( pOld->iFlags & MEMOBJ_NULL ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* No installed callback,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Copy the old callback */
	PH7_MemObjStore(pOld,pNew);
	PH7_MemObjRelease(pOld);
	/* Return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * value set_error_handler(callable $error_handler)
 *  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *   THIS FUNCTION IS DISABLED IN THE CURRENT RELEASE OF THE PH7 ENGINE.
 *  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 *  Sets a user-defined error handler function.
 *  This function can be used for defining your own way of handling errors during
 *  runtime, for example in applications in which you need to do cleanup of data/files
 *  when a critical error happens, or when you need to trigger an error under certain 
 *  conditions (using trigger_error()). 
 * Parameters
 *  $error_handler
 *   The user function needs to accept two parameters: the error code, and a string
 *   describing the error.
 *   Then there are three optional parameters that may be supplied: the filename in which
 *   the error occurred, the line number in which the error occurred, and the context in which
 *   the error occurred (an array that points to the active symbol table at the point the error occurred).
 *   The function can be shown as:
 *    handler ( int $errno , string $errstr [, string $errfile])
 *     errno
 *       The first parameter, errno, contains the level of the error raised, as an integer. 
 *   errstr
 *      The second parameter, errstr, contains the error message, as a string. 
 *   errfile
 *      The third parameter is optional, errfile, which contains the filename that the error
 *     was raised in, as a string. 
 *  Note:
 *   NULL may be passed instead, to reset this handler to its default state. 
 * Return
 *  Returns the name of the previously defined error handler, or NULL on error.
 *  If no previous handler was defined, NULL is also returned. If NULL is passed
 *  resetting the handler to its default state, TRUE is returned. 
 */
static int vm_builtin_set_error_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pOld,*pNew;
	/* Point to the old and the new handler */
	pOld = &pVm->aErrCB[0];
	pNew = &pVm->aErrCB[1];
	/* Return the old handler */
	ph7_result_value(pCtx,pOld); /* Will make it's own copy */
	if( nArg > 0 ){
		if( !ph7_value_is_callable(apArg[0])) {
			/* Not callable,return TRUE (As requested by the PHP specification) */
			PH7_MemObjRelease(pNew);
			ph7_result_bool(pCtx,1);
		}else{
			PH7_MemObjStore(pNew,pOld);
			/* Install the new handler */
			PH7_MemObjStore(apArg[0],pNew);
		}
	}
	ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
		"This function is disabled in the current release of the PH7(%s) engine",
		ph7_lib_version()
		);
	return PH7_OK;
}
/*
 * array debug_backtrace([ int $options = DEBUG_BACKTRACE_PROVIDE_OBJECT [, int $limit = 0 ]] )
 *  Generates a backtrace.
 * Paramaeter
 *  $options
 *   DEBUG_BACKTRACE_PROVIDE_OBJECT: Whether or not to populate the "object" index.
 *   DEBUG_BACKTRACE_IGNORE_ARGS 	Whether or not to omit the "args" index, and thus
 *   all the function/method arguments, to save memory.
 * $limit
 *   (Not Used)
 * Return
 *  An array.The possible returned elements are as follows:
 *          Possible returned elements from debug_backtrace()
 *          Name        Type      Description
 *          ------      ------     -----------
 *          function    string    The current function name. See also __FUNCTION__.
 *          line        integer   The current line number. See also __LINE__.
 *          file 	    string 	  The current file name. See also __FILE__.
 *          class       string    The current class name. See also __CLASS__
 *          object      object    The current object.
 *          args        array     If inside a function, this lists the functions arguments.
 *                                If inside an included file, this lists the included file name(s). 
 */
static int vm_builtin_debug_backtrace(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pArray;
	ph7_class *pClass;
	ph7_value *pValue;
	SyString *pFile;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	pValue = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pValue == 0 ){
		/* Out of memory,return NULL */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_null(pCtx);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		return PH7_OK;
	}
	/* Dump running function name and it's arguments  */
	if( pVm->pFrame->pParent ){
		VmFrame *pFrame = pVm->pFrame;
		ph7_vm_func *pFunc;
		ph7_value *pArg;
		while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
			/* Safely ignore the exception frame */
			pFrame = pFrame->pParent;
		}
		pFunc = (ph7_vm_func *)pFrame->pUserData;
		if( pFrame->pParent && pFunc ){
			ph7_value_string(pValue,pFunc->sName.zString,(int)pFunc->sName.nByte);
			ph7_array_add_strkey_elem(pArray,"function",pValue);
			ph7_value_reset_string_cursor(pValue);
		}
		/* Function arguments */
		pArg = ph7_context_new_array(pCtx);
		if( pArg  ){
			ph7_value *pObj;
			VmSlot *aSlot;
			sxu32 n;
			/* Start filling the array with the given arguments */
			aSlot = (VmSlot *)SySetBasePtr(&pFrame->sArg);
			for( n = 0;  n < SySetUsed(&pFrame->sArg) ; n++ ){
				pObj = (ph7_value *)SySetAt(&pCtx->pVm->aMemObj,aSlot[n].nIdx);
				if( pObj ){
					ph7_array_add_elem(pArg,0/* Automatic index assign*/,pObj);
				}
			}
			/* Save the array */
			ph7_array_add_strkey_elem(pArray,"args",pArg);
		}
	}
	ph7_value_int(pValue,1);
	/* Append the current line (which is always 1 since PH7 does not track
	 * line numbers at run-time. )
	 */
	ph7_array_add_strkey_elem(pArray,"line",pValue);
	/* Current processed script */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	if( pFile ){
		ph7_value_string(pValue,pFile->zString,(int)pFile->nByte);
		ph7_array_add_strkey_elem(pArray,"file",pValue);
		ph7_value_reset_string_cursor(pValue);
	}
	/* Top class */
	pClass = PH7_VmPeekTopClass(pVm);
	if( pClass ){
		ph7_value_reset_string_cursor(pValue);
		ph7_value_string(pValue,pClass->sName.zString,(int)pClass->sName.nByte);
		ph7_array_add_strkey_elem(pArray,"class",pValue);
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	/*
	 * Don't worry about freeing memory, everything will be released automatically
	 * as soon we return from this function.
	 */
	return PH7_OK;
}
/* 
 * Generate a small backtrace.
 * Store the generated dump in the given BLOB
 */
static int VmMiniBacktrace(
	ph7_vm *pVm, /* Target VM */
	SyBlob *pOut /* Store Dump here */
	)
{
	VmFrame *pFrame = pVm->pFrame;
	ph7_vm_func *pFunc;
	ph7_class *pClass;
	SyString *pFile;
	/* Called function */
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	pFunc = (ph7_vm_func *)pFrame->pUserData;
	SyBlobAppend(pOut,"[",sizeof(char));
	if( pFrame->pParent && pFunc ){
		SyBlobAppend(pOut,"Called function: ",sizeof("Called function: ")-1);
		SyBlobAppend(pOut,pFunc->sName.zString,pFunc->sName.nByte);
	}else{
		SyBlobAppend(pOut,"Global scope",sizeof("Global scope") - 1);
	}
	SyBlobAppend(pOut,"]",sizeof(char));
	/* Current processed script */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	if( pFile ){
		SyBlobAppend(pOut,"[",sizeof(char));
		SyBlobAppend(pOut,"Processed file: ",sizeof("Processed file: ")-1);
		SyBlobAppend(pOut,pFile->zString,pFile->nByte);
		SyBlobAppend(pOut,"]",sizeof(char));
	}
	/* Top class */
	pClass = PH7_VmPeekTopClass(pVm);
	if( pClass ){
		SyBlobAppend(pOut,"[",sizeof(char));
		SyBlobAppend(pOut,"Class: ",sizeof("Class: ")-1);
		SyBlobAppend(pOut,pClass->sName.zString,pClass->sName.nByte);
		SyBlobAppend(pOut,"]",sizeof(char));
	}
	SyBlobAppend(pOut,"\n",sizeof(char));
	/* All done */
	return SXRET_OK;
}
/*
 * void debug_print_backtrace()
 *  Prints a backtrace
 * Parameters
 * None
 * Return
 * NULL
 */
static int vm_builtin_debug_print_backtrace(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	SyBlob sDump;
	SyBlobInit(&sDump,&pVm->sAllocator);
	/* Generate the backtrace */
	VmMiniBacktrace(pVm,&sDump);
	/* Output backtrace */
	ph7_context_output(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump));
	/* All done,cleanup */
	SyBlobRelease(&sDump);
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	return PH7_OK;
}
/*
 * string debug_string_backtrace()
 *  Generate a backtrace
 * Parameters
 * None
 * Return
 *  A mini backtrace().
 * Note that this is a symisc extension.
 */
static int vm_builtin_debug_string_backtrace(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	SyBlob sDump;
	SyBlobInit(&sDump,&pVm->sAllocator);
	/* Generate the backtrace */
	VmMiniBacktrace(pVm,&sDump);
	/* Return the backtrace */
	ph7_result_string(pCtx,(const char *)SyBlobData(&sDump),(int)SyBlobLength(&sDump)); /* Will make it's own copy */
	/* All done,cleanup */
	SyBlobRelease(&sDump);
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	return PH7_OK;
}
/*
 * The following routine is invoked by the engine when an uncaught
 * exception is triggered.
 */
static sxi32 VmUncaughtException(
	ph7_vm *pVm, /* Target VM */
	ph7_class_instance *pThis /* Exception class instance [i.e: Exception $e] */
	)
{
	ph7_value *apArg[2],sArg;
	int nArg = 1;
	sxi32 rc;
	if( pVm->nExceptDepth > 15 ){
		/* Nesting limit reached */
		return SXRET_OK;
	}
	/* Call any exception handler if available */
	PH7_MemObjInit(pVm,&sArg);
	if( pThis ){
		/* Load the exception instance */
		sArg.x.pOther = pThis;
		pThis->iRef++;
		MemObjSetType(&sArg,MEMOBJ_OBJ);
	}else{
		nArg = 0;
	}
	apArg[0] = &sArg;
	/* Call the exception handler if available */
	pVm->nExceptDepth++;
	rc = PH7_VmCallUserFunction(&(*pVm),&pVm->aExceptionCB[1],1,apArg,0);
	pVm->nExceptDepth--;
	if( rc != SXRET_OK ){
		SyString sName = { "Exception" , sizeof("Exception") - 1 };
		SyString sFuncName = { "Global",sizeof("Global") - 1 };
		VmFrame *pFrame = pVm->pFrame;
		/* No available handler,generate a fatal error */ 
		if( pThis ){
			SyStringDupPtr(&sName,&pThis->pClass->sName);
		}
		while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
			/* Ignore exception frames */
			pFrame = pFrame->pParent;
		}
		if( pFrame->pParent ){
			if( pFrame->iFlags & VM_FRAME_CATCH ){
				SyStringInitFromBuf(&sFuncName,"Catch_block",sizeof("Catch_block")-1);
			}else{
				ph7_vm_func *pFunc = (ph7_vm_func *)pFrame->pUserData;
				if( pFunc ){
					SyStringDupPtr(&sFuncName,&pFunc->sName);
				}
			}
		}
		/* Generate a listing */
		VmErrorFormat(&(*pVm),PH7_CTX_ERR,
			"Uncaught exception '%z' in the '%z' frame context",
			&sName,&sFuncName);
		/* Tell the upper layer to stop VM execution immediately  */
		rc = SXERR_ABORT;
	}
	PH7_MemObjRelease(&sArg);
	return rc;
}
/*
 * Throw an user exception.
 */
static sxi32 VmThrowException(
	ph7_vm *pVm,              /* Target VM */
	ph7_class_instance *pThis /* Exception class instance [i.e: Exception $e] */
	)
{
	ph7_exception_block *pCatch; /* Catch block to execute */
	ph7_exception **apException;
	ph7_exception *pException;
	/* Point to the stack of loaded exceptions */
	apException = (ph7_exception **)SySetBasePtr(&pVm->aException);
	pException = 0;
	pCatch = 0;
	if( SySetUsed(&pVm->aException) > 0 ){
		ph7_exception_block *aCatch;
		ph7_class *pClass;
		sxu32 j;
		/* Locate the appropriate block to execute */
		pException = apException[SySetUsed(&pVm->aException) - 1];
		(void)SySetPop(&pVm->aException);
		aCatch = (ph7_exception_block *)SySetBasePtr(&pException->sEntry);
		for( j = 0 ; j < SySetUsed(&pException->sEntry) ; ++j ){
			SyString *pName = &aCatch[j].sClass;
			/* Extract the target class */
			pClass = PH7_VmExtractClass(&(*pVm),pName->zString,pName->nByte,TRUE,0);
			if( pClass == 0 ){
				/* No such class */
				continue;
			}
			if( VmInstanceOf(pThis->pClass,pClass) ){
				/* Catch block found,break immeditaley */
				pCatch = &aCatch[j];
				break;
			}
		}		
	}
	/* Execute the cached block if available */
	if( pCatch == 0 ){
		sxi32 rc;
		rc = VmUncaughtException(&(*pVm),pThis);
		if( rc == SXRET_OK && pException ){
			VmFrame *pFrame = pVm->pFrame;
			while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
				/* Safely ignore the exception frame */
				pFrame = pFrame->pParent;
			}
			if( pException->pFrame == pFrame ){
				/* Tell the upper layer that the exception was caught */
				pFrame->iFlags &= ~VM_FRAME_THROW;
			}
		}
		return rc;
	}else{
		VmFrame *pFrame = pVm->pFrame;
		sxi32 rc;
		while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
			/* Safely ignore the exception frame */
			pFrame = pFrame->pParent;
		}
		if( pException->pFrame == pFrame ){
			/* Tell the upper layer that the exception was caught */
			pFrame->iFlags &= ~VM_FRAME_THROW;
		}
		/* Create a private frame first */
		rc = VmEnterFrame(&(*pVm),0,0,&pFrame);
		if( rc == SXRET_OK ){
			/* Mark as catch frame */
			ph7_value *pObj = VmExtractMemObj(&(*pVm),&pCatch->sThis,FALSE,TRUE);
			pFrame->iFlags |= VM_FRAME_CATCH;
			if( pObj ){
				/* Install the exception instance */
				pThis->iRef++; /* Increment reference count */
				pObj->x.pOther = pThis;
				MemObjSetType(pObj,MEMOBJ_OBJ);
			}
			/* Exceute the block */
			VmLocalExec(&(*pVm),&pCatch->sByteCode,0);
			/* Leave the frame */
			VmLeaveFrame(&(*pVm));
		}		
	}
	/* TICKET 1433-60: Do not release the 'pException' pointer since it may
	 * be used again if a 'goto' statement is executed.
	 */
	return SXRET_OK;
}
/*
 * Section:
 *  Version,Credits and Copyright related functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * string ph7version(void)
 *  Returns the running version of the PH7 version.
 * Parameters
 *  None
 * Return
 * Current PH7 version.
 */
static int vm_builtin_ph7_version(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SXUNUSED(nArg);
	SXUNUSED(apArg); /* cc warning */
	/* Current engine version */
	ph7_result_string(pCtx,PH7_VERSION,sizeof(PH7_VERSION) - 1);
	return PH7_OK;
}
/*
 * PH7 release information HTML page used by the ph7info() and ph7credits() functions.
 */
 #define PH7_HTML_PAGE_HEADER "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\" \"http://www.w3.org/TR/html4/strict.dtd\">"\
 "<html><head>"\
 "<!-- Copyright (C) 2011-2012 Symisc Systems,http://www.symisc.net contact@symisc.net -->"\
 "<meta content=\"text/html; charset=UTF-8\" http-equiv=\"content-type\"><title>PH7 engine credits</title>"\
 "<style type=\"text/css\">"\
 "div {"\
     "border: 1px solid #cccccc;"\
     "-moz-border-radius-topleft: 10px;"\
     "-moz-border-radius-bottomright: 10px;"\
     "-moz-border-radius-bottomleft: 10px;"\
     "-moz-border-radius-topright: 10px;"\
     "-webkit-border-radius: 10px;"\
     "-o-border-radius: 10px;"\
     "border-radius: 10px;"\
     "padding-left: 2em;"\
     "background-color: white;"\
     "margin-left: auto;"\
     "font-family: verdana;"\
     "padding-right: 2em;"\
     "margin-right: auto;"\
     "}"\
     "body {"\
     "padding: 0.2em;"\
     "font-style: normal;"\
     "font-size: medium;"\
     "background-color: #f2f2f2;"\
     "}"\
     "hr {"\
     "border-style: solid none none;"\
     "border-width: 1px medium medium;"\
     "border-top: 1px solid #cccccc;"\
     "height: 1px;"\
     "}"\
     "a {"\
     "color: #3366cc;"\
     "text-decoration: none;"\
     "}"\
     "a:hover {"\
     "color: #999999;"\
     "}"\
     "a:active {"\
     "color: #663399;"\
     "}"\
     "h1 {"\
     "margin: 0;"\
     "padding: 0;"\
     "font-family: Verdana;"\
     "font-weight: bold;"\
     "font-style: normal;"\
     "font-size: medium;"\
     "text-transform: capitalize;"\
     "color: #0a328c;"\
     "}"\
     "p {"\
     "margin: 0 auto;"\
     "font-size: medium;"\
     "font-style: normal;"\
     "font-family: verdana;"\
     "}"\
"</style></head><body>"\
"<div style=\"background-color: white; width: 699px;\">"\
"<h1 style=\"font-family: Verdana; text-align: right;\"><small><small>PH7 Engine Credits</small></small></h1>"\
"<hr style=\"margin-left: auto; margin-right: auto;\">"\
"<p><small><a href=\"http://ph7.symisc.net/\"><small><span style=\"font-weight: bold;\">"\
"Symisc PH7</span></small></a><small>&nbsp;</small></small></p>"\
"<p style=\"text-align: left;\"><small><small>"\
"A highly efficient embeddable bytecode compiler and a Virtual Machine for the PHP(5) Programming Language.</small></small></p>"\
"<p style=\"text-align: left;\"><small><small>Copyright (C) Symisc Systems.<br></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Engine Version:</small></small></p>"\
"<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\">"

#define PH7_HTML_PAGE_FORMAT "<small><small><span style=\"font-weight: normal;\">%s</span></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Engine ID:</small></small></p>"\
"<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\"><small><small><span style=\"font-weight: normal;\">%s %s</span></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Underlying VFS:</small></small></p>"\
"<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\"><small><small><span style=\"font-weight: normal;\">%s</span></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Total Built-in Functions:</small></small></p>"\
"<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\"><small><small><span style=\"font-weight: normal;\">%d</span></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Total Built-in Classes:</small></small></p>"\
"<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\"><small><small><span style=\"font-weight: normal;\">%d</span></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Host Operating System:</small></small></p>"\
"<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\"><small><small><span style=\"font-weight: normal;\">%s</span></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small style=\"font-weight: bold;\"><small><small></small></small></small></p>"\
"<p style=\"text-align: left; font-weight: bold;\"><small><small>Licensed To: &lt;Public Release Under The <a href=\"http://www.symisc.net/spl.txt\">"\
 "Symisc Public License (SPL)</a>&gt;</small></small></p>"

#define PH7_HTML_PAGE_FOOTER "<p style=\"text-align: left; font-weight: bold; margin-left: 40px;\"><small><small><span style=\"font-weight: normal;\">/*<br>"\
"&nbsp;* Copyright (C) 2011, 2012 Symisc Systems. All rights reserved.<br>"\
"&nbsp;*<br>"\
"&nbsp;* Redistribution and use in source and binary forms, with or without<br>"\
"&nbsp;* modification, are permitted provided that the following conditions<br>"\
"&nbsp;* are met:<br>"\
"&nbsp;* 1. Redistributions of source code must retain the above copyright<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; notice, this list of conditions and the following disclaimer.<br>"\
"&nbsp;* 2. Redistributions in binary form must reproduce the above copyright<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; notice, this list of conditions and the following disclaimer in the<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; documentation and/or other materials provided with the distribution.<br>"\
"&nbsp;* 3. Redistributions in any form must be accompanied by information on<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; how to obtain complete source code for the PH7 engine and any <br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; accompanying software that uses the PH7 engine software.<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; The source code must either be included in the distribution<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; or be available for no more than the cost of distribution plus<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; a nominal fee, and must be freely redistributable under reasonable<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; conditions. For an executable file, complete source code means<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; the source code for all modules it contains.It does not include<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; source code for modules or files that typically accompany the major<br>"\
"&nbsp;*&nbsp;&nbsp;&nbsp; components of the operating system on which the executable file runs.<br>"\
"&nbsp;*<br>"\
"&nbsp;* THIS SOFTWARE IS PROVIDED BY SYMISC SYSTEMS ``AS IS'' AND ANY EXPRESS<br>"\
"&nbsp;* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED<br>"\
"&nbsp;* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR<br>"\
"&nbsp;* NON-INFRINGEMENT, ARE DISCLAIMED.&nbsp; IN NO EVENT SHALL SYMISC SYSTEMS<br>"\
"&nbsp;* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR<br>"\
"&nbsp;* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF<br>"\
"&nbsp;* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR<br>"\
"&nbsp;* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,<br>"\
"&nbsp;* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE<br>"\
"&nbsp;* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN<br>"\
"&nbsp;* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.<br>"\
"&nbsp;*/<br>"\
"</span></small></small></p>"\
"<p style=\"text-align: right;\"><small><small>Copyright (C) <a href=\"http://www.symisc.net/\">Symisc Systems</a></small></small><big>"\
"</big></p></div></body></html>"
/*
 * bool ph7credits(void)
 * bool ph7info(void)
 * bool ph7copyright(void)
 *  Prints out the credits for PH7 engine
 * Parameters
 *  None
 * Return
 *  Always TRUE
 */
static int vm_builtin_ph7_credits(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm; /* Point to the underlying VM */
	/* Expand the HTML page above*/
	ph7_context_output(pCtx,PH7_HTML_PAGE_HEADER,(int)sizeof(PH7_HTML_PAGE_HEADER)-1);
	ph7_context_output_format(
		pCtx,
		PH7_HTML_PAGE_FORMAT,
		ph7_lib_version(),   /* Engine version */
		ph7_lib_signature(), /* Engine signature */
		ph7_lib_ident(),     /* Engine ID */
		pVm->pEngine->pVfs ? pVm->pEngine->pVfs->zName : "null_vfs",
		SyHashTotalEntry(&pVm->hFunction) + SyHashTotalEntry(&pVm->hHostFunction),/* # built-in functions */
		SyHashTotalEntry(&pVm->hClass),
#ifdef __WINNT__
		"Windows NT"
#elif defined(__UNIXES__)
		"UNIX-Like"
#else
		"Other OS"
#endif
		);
	ph7_context_output(pCtx,PH7_HTML_PAGE_FOOTER,(int)sizeof(PH7_HTML_PAGE_FOOTER)-1);
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	/* Return TRUE */
	//ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * Section:
 *    URL related routines.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/* Forward declaration */
static sxi32 VmHttpSplitURI(SyhttpUri *pOut,const char *zUri,sxu32 nLen);
/*
 * value parse_url(string $url [, int $component = -1 ])
 *  Parse a URL and return its fields.
 * Parameters
 *  $url
 *   The URL to parse.
 * $component
 *  Specify one of PHP_URL_SCHEME, PHP_URL_HOST, PHP_URL_PORT, PHP_URL_USER
 *  PHP_URL_PASS, PHP_URL_PATH, PHP_URL_QUERY or PHP_URL_FRAGMENT to retrieve
 *  just a specific URL component as a string (except when PHP_URL_PORT is given
 *  in which case the return value will be an integer).
 * Return
 *  If the component parameter is omitted, an associative array is returned.
 *  At least one element will be present within the array. Potential keys within
 *  this array are:
 *   scheme - e.g. http
 *   host
 *   port
 *   user
 *   pass
 *   path
 *   query - after the question mark ?
 *   fragment - after the hashmark #
 * Note:
 *  FALSE is returned on failure.
 *  This function work with relative URL unlike the one shipped
 *  with the standard PHP engine.
 */
static int vm_builtin_parse_url(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zStr; /* Input string */
	SyString *pComp;  /* Pointer to the URI component */
	SyhttpUri sURI;   /* Parse of the given URI */
	int nLen;
	sxi32 rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the given URI */
	zStr = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Get a parse */
	rc = VmHttpSplitURI(&sURI,zStr,(sxu32)nLen);
	if( rc != SXRET_OK ){
		/* Malformed input,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		int nComponent = ph7_value_to_int(apArg[1]);
		/* Refer to constant.c for constants values */
		switch(nComponent){
		case 1: /* PHP_URL_SCHEME */
			pComp = &sURI.sScheme;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		case 2: /* PHP_URL_HOST */
			pComp = &sURI.sHost;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		case 3: /* PHP_URL_PORT */
			pComp = &sURI.sPort;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				int iPort = 0;
				/* Cast the value to integer */
				SyStrToInt32(pComp->zString,pComp->nByte,(void *)&iPort,0);
				ph7_result_int(pCtx,iPort);
			}
			break;
		case 4: /* PHP_URL_USER */
			pComp = &sURI.sUser;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		case 5: /* PHP_URL_PASS */
			pComp = &sURI.sPass;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		case 7: /* PHP_URL_QUERY */
			pComp = &sURI.sQuery;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		case 8: /* PHP_URL_FRAGMENT */
			pComp = &sURI.sFragment;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		case 6: /*  PHP_URL_PATH */
			pComp = &sURI.sPath;
			if( pComp->nByte < 1 ){
				/* No available value,return NULL */
				ph7_result_null(pCtx);
			}else{
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}
			break;
		default:
			/* No such entry,return NULL */
			ph7_result_null(pCtx);
			break;
		}
	}else{
		ph7_value *pArray,*pValue;
		/* Return an associative array */
		pArray = ph7_context_new_array(pCtx);  /* Empty array */
		pValue = ph7_context_new_scalar(pCtx); /* Array value */
		if( pArray == 0 || pValue == 0 ){
			/* Out of memory */
			ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 engine is running out of memory");
			/* Return false */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Fill the array */
		pComp = &sURI.sScheme;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"scheme",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sHost;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"host",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sPort;
		if( pComp->nByte > 0 ){
			int iPort = 0;/* cc warning */
			/* Convert to integer */
			SyStrToInt32(pComp->zString,pComp->nByte,(void *)&iPort,0);
			ph7_value_int(pValue,iPort);
			ph7_array_add_strkey_elem(pArray,"port",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sUser;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"user",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sPass;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"pass",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sPath;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"path",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sQuery;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"query",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		pComp = &sURI.sFragment;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			ph7_array_add_strkey_elem(pArray,"fragment",pValue); /* Will make it's own copy */
		}
		/* Return the created array */
		ph7_result_value(pCtx,pArray);
		/* NOTE:
		 * Don't worry about freeing 'pValue',everything will be released
		 * automatically as soon we return from this function.
		 */
	}
	/* All done */
	return PH7_OK;
}
/*
 * Section:
 *   Array related routines.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 * Note 2012-5-21 01:04:15:
 *  Array related functions that need access to the underlying
 *  virtual machine are implemented here rather than 'hashmap.c'
 */
/*
 * The [compact()] function store it's state information in an instance
 * of the following structure.
 */
struct compact_data
{
	ph7_value *pArray;  /* Target array */
	int nRecCount;      /* Recursion count */
};
/*
 * Walker callback for the [compact()] function defined below.
 */
static int VmCompactCallback(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	struct compact_data *pData = (struct compact_data *)pUserData;
	ph7_value *pArray = (ph7_value *)pData->pArray;
	ph7_vm *pVm = pArray->pVm;
	/* Act according to the hashmap value */
	if( ph7_value_is_string(pValue) ){
		SyString sVar;
		SyStringInitFromBuf(&sVar,SyBlobData(&pValue->sBlob),SyBlobLength(&pValue->sBlob));
		if( sVar.nByte > 0 ){
			/* Query the current frame */
			pKey = VmExtractMemObj(pVm,&sVar,FALSE,FALSE);
			/* ^
			 * | Avoid wasting variable and use 'pKey' instead 
			 */
			if( pKey ){
				/* Perform the insertion */
				ph7_array_add_elem(pArray,pValue/* Variable name*/,pKey/* Variable value */);
			}
		}
	}else if( ph7_value_is_array(pValue) && pData->nRecCount < 32) {
		int rc;
		/* Recursively traverse this array */
		pData->nRecCount++;
		rc = PH7_HashmapWalk((ph7_hashmap *)pValue->x.pOther,VmCompactCallback,pUserData);
		pData->nRecCount--;
		return rc;
	}
	return SXRET_OK;
}
/*
 * array compact(mixed $varname [, mixed $... ])
 *  Create array containing variables and their values.
 *  For each of these, compact() looks for a variable with that name
 *  in the current symbol table and adds it to the output array such 
 *  that the variable name becomes the key and the contents of the variable
 *  become the value for that key. In short, it does the opposite of extract().
 *  Any strings that are not set will simply be skipped. 
 * Parameters
 *  $varname
 *   compact() takes a variable number of parameters. Each parameter can be either
 *   a string containing the name of the variable, or an array of variable names.
 *   The array can contain other arrays of variable names inside it; compact() handles
 *   it recursively.
 * Return
 *  The output array with all the variables added to it or NULL on failure
 */
static int vm_builtin_compact(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pObj;
	ph7_vm *pVm = pCtx->pVm;
	const char *zName;
	SyString sVar;
	int i,nLen;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create the array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		/* Out of memory */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 engine is running out of memory");
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for( i = 0 ; i < nArg ; i++ ){
		if( !ph7_value_is_string(apArg[i]) ){
			if( ph7_value_is_array(apArg[i]) ){
				struct compact_data sData;
				ph7_hashmap *pMap = (ph7_hashmap *)apArg[i]->x.pOther;
				/* Recursively walk the array */
				sData.nRecCount = 0;
				sData.pArray = pArray;
				PH7_HashmapWalk(pMap,VmCompactCallback,&sData);
			}
		}else{
			/* Extract variable name */
			zName = ph7_value_to_string(apArg[i],&nLen);
			if( nLen > 0 ){
				SyStringInitFromBuf(&sVar,zName,nLen);
				/* Check if the variable is available in the current frame */
				pObj = VmExtractMemObj(pVm,&sVar,FALSE,FALSE);
				if( pObj ){
					ph7_array_add_elem(pArray,apArg[i]/*Variable name*/,pObj/* Variable value */);
				}
			}
		}
	}
	/* Return the array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * The [extract()] function store it's state information in an instance
 * of the following structure.
 */
typedef struct extract_aux_data extract_aux_data;
struct extract_aux_data
{
	ph7_vm *pVm;          /* VM that own this instance */
	int iCount;           /* Number of variables successfully imported  */
	const char *zPrefix;  /* Prefix name */
	int Prefixlen;        /* Prefix  length */
	int iFlags;           /* Control flags */
	char zWorker[1024];   /* Working buffer */
};
/* Forward declaration */
static int VmExtractCallback(ph7_value *pKey,ph7_value *pValue,void *pUserData);
/*
 * int extract(array &$var_array[,int $extract_type = EXTR_OVERWRITE[,string $prefix = NULL ]])
 *   Import variables into the current symbol table from an array.
 * Parameters
 * $var_array
 *  An associative array. This function treats keys as variable names and values
 *  as variable values. For each key/value pair it will create a variable in the current symbol
 *  table, subject to extract_type and prefix parameters.
 *  You must use an associative array; a numerically indexed array will not produce results
 *  unless you use EXTR_PREFIX_ALL or EXTR_PREFIX_INVALID.
 * $extract_type
 *  The way invalid/numeric keys and collisions are treated is determined by the extract_type.
 *  It can be one of the following values:
 *   EXTR_OVERWRITE
 *       If there is a collision, overwrite the existing variable. 
 *   EXTR_SKIP
 *       If there is a collision, don't overwrite the existing variable. 
 *   EXTR_PREFIX_SAME
 *       If there is a collision, prefix the variable name with prefix. 
 *   EXTR_PREFIX_ALL
 *       Prefix all variable names with prefix. 
 *   EXTR_PREFIX_INVALID
 *       Only prefix invalid/numeric variable names with prefix. 
 *   EXTR_IF_EXISTS
 *       Only overwrite the variable if it already exists in the current symbol table
 *       otherwise do nothing.
 *       This is useful for defining a list of valid variables and then extracting only those
 *       variables you have defined out of $_REQUEST, for example. 
 *   EXTR_PREFIX_IF_EXISTS
 *       Only create prefixed variable names if the non-prefixed version of the same variable exists in 
 *      the current symbol table.
 * $prefix
 *  Note that prefix is only required if extract_type is EXTR_PREFIX_SAME, EXTR_PREFIX_ALL
 *  EXTR_PREFIX_INVALID or EXTR_PREFIX_IF_EXISTS. If the prefixed result is not a valid variable name
 *  it is not imported into the symbol table. Prefixes are automatically separated from the array key by an
 *  underscore character.
 * Return
 *   Returns the number of variables successfully imported into the symbol table.
 */
static int vm_builtin_extract(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	extract_aux_data sAux;
	ph7_hashmap *pMap;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry < 1 ){
		/* Empty map,return  0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Prepare the aux data */
	SyZero(&sAux,sizeof(extract_aux_data)-sizeof(sAux.zWorker));
	if( nArg > 1 ){
		sAux.iFlags = ph7_value_to_int(apArg[1]);
		if( nArg > 2 ){
			sAux.zPrefix = ph7_value_to_string(apArg[2],&sAux.Prefixlen);
		}
	}
	sAux.pVm = pCtx->pVm;
	/* Invoke the worker callback */
	PH7_HashmapWalk(pMap,VmExtractCallback,&sAux);
	/* Number of variables successfully imported */
	ph7_result_int(pCtx,sAux.iCount);
	return PH7_OK;
}
/*
 * Worker callback for the [extract()] function defined
 * below.
 */
static int VmExtractCallback(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	extract_aux_data *pAux = (extract_aux_data *)pUserData;
	int iFlags = pAux->iFlags;
	ph7_vm *pVm = pAux->pVm;
	ph7_value *pObj;
	SyString sVar;
	if( (iFlags & 0x10/* EXTR_PREFIX_INVALID */) && (pKey->iFlags & (MEMOBJ_INT|MEMOBJ_BOOL|MEMOBJ_REAL))){
		iFlags |= 0x08; /*EXTR_PREFIX_ALL*/
	}
	/* Perform a string cast */
	PH7_MemObjToString(pKey);
	if( SyBlobLength(&pKey->sBlob) < 1 ){
		/* Unavailable variable name */
		return SXRET_OK;
	}
	sVar.nByte = 0; /* cc warning */
	if( (iFlags & 0x08/*EXTR_PREFIX_ALL*/ ) && pAux->Prefixlen > 0 ){
		sVar.nByte = (sxu32)SyBufferFormat(pAux->zWorker,sizeof(pAux->zWorker),"%.*s_%.*s",
			pAux->Prefixlen,pAux->zPrefix,
			SyBlobLength(&pKey->sBlob),SyBlobData(&pKey->sBlob)
			);
	}else{
		sVar.nByte = (sxu32) SyMemcpy(SyBlobData(&pKey->sBlob),pAux->zWorker,
			SXMIN(SyBlobLength(&pKey->sBlob),sizeof(pAux->zWorker)));
	}
	sVar.zString = pAux->zWorker;
	/* Try to extract the variable */
	pObj = VmExtractMemObj(pVm,&sVar,TRUE,FALSE);
	if( pObj ){
		/* Collision */
		if( iFlags & 0x02 /* EXTR_SKIP */ ){
			return SXRET_OK;
		}
		if( iFlags & 0x04 /* EXTR_PREFIX_SAME */ ){
			if( (iFlags & 0x08/*EXTR_PREFIX_ALL*/) || pAux->Prefixlen < 1){
				/* Already prefixed */
				return SXRET_OK;
			}
			sVar.nByte = (sxu32)SyBufferFormat(pAux->zWorker,sizeof(pAux->zWorker),"%.*s_%.*s",
				pAux->Prefixlen,pAux->zPrefix,
				SyBlobLength(&pKey->sBlob),SyBlobData(&pKey->sBlob)
				);
			pObj = VmExtractMemObj(pVm,&sVar,TRUE,TRUE);
		}
	}else{
		/* Create the variable */
		pObj = VmExtractMemObj(pVm,&sVar,TRUE,TRUE);
	}
	if( pObj ){
		/* Overwrite the old value */
		PH7_MemObjStore(pValue,pObj);
		/* Increment counter */
		pAux->iCount++;
	}
	return SXRET_OK;
}
/*
 * Worker callback for the [import_request_variables()] function
 * defined below.
 */
static int VmImportRequestCallback(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	extract_aux_data *pAux = (extract_aux_data *)pUserData;
	ph7_vm *pVm = pAux->pVm;
	ph7_value *pObj;
	SyString sVar;
	/* Perform a string cast */
	PH7_MemObjToString(pKey);
	if( SyBlobLength(&pKey->sBlob) < 1 ){
		/* Unavailable variable name */
		return SXRET_OK;
	}
	sVar.nByte = 0; /* cc warning */
	if( pAux->Prefixlen > 0 ){
		sVar.nByte = (sxu32)SyBufferFormat(pAux->zWorker,sizeof(pAux->zWorker),"%.*s%.*s",
			pAux->Prefixlen,pAux->zPrefix,
			SyBlobLength(&pKey->sBlob),SyBlobData(&pKey->sBlob)
			);
	}else{
		sVar.nByte = (sxu32) SyMemcpy(SyBlobData(&pKey->sBlob),pAux->zWorker,
			SXMIN(SyBlobLength(&pKey->sBlob),sizeof(pAux->zWorker)));
	}
	sVar.zString = pAux->zWorker;
	/* Extract the variable */
	pObj = VmExtractMemObj(pVm,&sVar,TRUE,TRUE);
	if( pObj ){
		PH7_MemObjStore(pValue,pObj);
	}
	return SXRET_OK;
}
/*
 * bool import_request_variables(string $types[,string $prefix])
 *  Import GET/POST/Cookie variables into the global scope.
 * Parameters
 * $types
 *  Using the types parameter, you can specify which request variables to import.
 *  You can use 'G', 'P' and 'C' characters respectively for GET, POST and Cookie.
 *  These characters are not case sensitive, so you can also use any combination of 'g', 'p' and 'c'.
 *  POST includes the POST uploaded file information.
 *  Note:
 *  Note that the order of the letters matters, as when using "GP", the POST variables will overwrite 
 *  GET variables with the same name. Any other letters than GPC are discarded.
 * $prefix
 *  Variable name prefix, prepended before all variable's name imported into the global scope.
 *  So if you have a GET value named "userid", and provide a prefix "pref_", then you'll get a global
 *  variable named $pref_userid.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_import_request_variables(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPrefix,*zEnd,*zImport;
	extract_aux_data sAux;
	int nLen,nPrefixLen;
	ph7_value *pSuper;
	ph7_vm *pVm;
	/* By default import only $_GET variables  */
	zImport = "G";
	nLen = (int)sizeof(char);
	zPrefix = 0;
	nPrefixLen = 0;
	if( nArg > 0 ){
		if( ph7_value_is_string(apArg[0]) ){
			zImport = ph7_value_to_string(apArg[0],&nLen);
		}
		if( nArg > 1 && ph7_value_is_string(apArg[1]) ){
			zPrefix = ph7_value_to_string(apArg[1],&nPrefixLen);
		}
	}
	/* Point to the underlying VM */
	pVm = pCtx->pVm;
	/* Initialize the aux data */
	SyZero(&sAux,sizeof(sAux)-sizeof(sAux.zWorker));
	sAux.zPrefix = zPrefix;
	sAux.Prefixlen = nPrefixLen;
	sAux.pVm = pVm;
	/* Extract */
	zEnd = &zImport[nLen];
	while( zImport < zEnd ){
		int c = zImport[0];
		pSuper = 0;
		if( c == 'G' || c == 'g' ){
			/* Import $_GET variables */
			pSuper = VmExtractSuper(pVm,"_GET",sizeof("_GET")-1);
		}else if( c == 'P' || c == 'p' ){
			/* Import $_POST variables */
			pSuper = VmExtractSuper(pVm,"_POST",sizeof("_POST")-1);
		}else if( c == 'c' || c == 'C' ){
			/* Import $_COOKIE variables */
			pSuper = VmExtractSuper(pVm,"_COOKIE",sizeof("_COOKIE")-1);
		}
		if( pSuper ){
			/* Iterate throw array entries */
			ph7_array_walk(pSuper,VmImportRequestCallback,&sAux);
		}
		/* Advance the cursor */
		zImport++;
	}
	/* All done,return TRUE*/
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * Compile and evaluate a PHP chunk at run-time.
 * Refer to the eval() language construct implementation for more
 * information.
 */
static sxi32 VmEvalChunk(
	ph7_vm *pVm,        /* Underlying Virtual Machine */
	ph7_context *pCtx,  /* Call Context */
	SyString *pChunk,   /* PHP chunk to evaluate */ 
	int iFlags,         /* Compile flag */
	int bTrueReturn     /* TRUE to return execution result */
	)
{
	SySet *pByteCode,aByteCode;
	ProcConsumer xErr = 0;
	void *pErrData = 0;
	/* Initialize bytecode container */
	SySetInit(&aByteCode,&pVm->sAllocator,sizeof(VmInstr));
	SySetAlloc(&aByteCode,0x20);
	/* Reset the code generator */
	if( bTrueReturn ){
		/* Included file,log compile-time errors */
		xErr = pVm->pEngine->xConf.xErr;
		pErrData = pVm->pEngine->xConf.pErrData;
	}
	PH7_ResetCodeGenerator(pVm,xErr,pErrData);
	/* Swap bytecode container */
	pByteCode = pVm->pByteContainer;
	pVm->pByteContainer = &aByteCode;
	/* Compile the chunk */
	PH7_CompileScript(pVm,pChunk,iFlags);
	if( pVm->sCodeGen.nErr > 0 ){
		/* Compilation error,return false */
		if( pCtx ){
			ph7_result_bool(pCtx,0);
		}
	}else{
		ph7_value sResult; /* Return value */
		if( SXRET_OK != PH7_VmEmitInstr(pVm,PH7_OP_DONE,0,0,0,0) ){
			/* Out of memory */
			if( pCtx ){
				ph7_result_bool(pCtx,0);
			}
			goto Cleanup;
		}
		if( bTrueReturn ){
			/* Assume a boolean true return value */
			PH7_MemObjInitFromBool(pVm,&sResult,1);
		}else{
			/* Assume a null return value */
			PH7_MemObjInit(pVm,&sResult);
		}
		/* Execute the compiled chunk */
		VmLocalExec(pVm,&aByteCode,&sResult);
		if( pCtx ){
			/* Set the execution result */
			ph7_result_value(pCtx,&sResult);
		}
		PH7_MemObjRelease(&sResult);
	}
Cleanup:
	/* Cleanup the mess left behind */
	pVm->pByteContainer = pByteCode;
	SySetRelease(&aByteCode);
	return SXRET_OK;
}
/*
 * value eval(string $code)
 *   Evaluate a string as PHP code.
 * Parameter
 *  code: PHP code to evaluate.
 * Return
 *  eval() returns NULL unless return is called in the evaluated code, in which case 
 *  the value passed to return is returned. If there is a parse error in the evaluated
 *  code, eval() returns FALSE and execution of the following code continues normally.
 */
static int vm_builtin_eval(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyString sChunk;    /* Chunk to evaluate */
	if( nArg < 1 ){
		/* Nothing to evaluate,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Chunk to evaluate */
	sChunk.zString = ph7_value_to_string(apArg[0],(int *)&sChunk.nByte);
	if( sChunk.nByte < 1 ){
		/* Empty string,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Eval the chunk */
	VmEvalChunk(pCtx->pVm,&(*pCtx),&sChunk,PH7_PHP_ONLY,FALSE);
	return SXRET_OK;
}
/*
 * Check if a file path is already included.
 */
static int VmIsIncludedFile(ph7_vm *pVm,SyString *pFile)
{
	SyString *aEntries;
	sxu32 n;
	aEntries = (SyString *)SySetBasePtr(&pVm->aIncluded);
	/* Perform a linear search */
	for( n = 0 ; n < SySetUsed(&pVm->aIncluded) ; ++n ){
		if( SyStringCmp(pFile,&aEntries[n],SyMemcmp) == 0 ){
			/* Already included */
			return TRUE;
		}
	}
	return FALSE;
}
/*
 * Push a file path in the appropriate VM container.
 */
PH7_PRIVATE sxi32 PH7_VmPushFilePath(ph7_vm *pVm,const char *zPath,int nLen,sxu8 bMain,sxi32 *pNew)
{
	SyString sPath;
	char *zDup;
#ifdef __WINNT__
	char *zCur;
#endif
	sxi32 rc;
	if( nLen < 0 ){
		nLen = SyStrlen(zPath);
	}
	/* Duplicate the file path first */
	zDup = SyMemBackendStrDup(&pVm->sAllocator,zPath,nLen);
	if( zDup == 0 ){
		return SXERR_MEM;
	}
#ifdef __WINNT__
	/* Normalize path on windows
	 * Example:
	 *    Path/To/File.php
	 * becomes
	 *   path\to\file.php
	 */
	zCur = zDup;
	while( zCur[0] != 0 ){
		if( zCur[0] == '/' ){
			zCur[0] = '\\';
		}else if( (unsigned char)zCur[0] < 0xc0 && SyisUpper(zCur[0]) ){
			int c = SyToLower(zCur[0]);
			zCur[0] = (char)c; /* MSVC stupidity */
		}
		zCur++;
	}
#endif
	/* Install the file path */
	SyStringInitFromBuf(&sPath,zDup,nLen);
	if( !bMain ){
		if( VmIsIncludedFile(&(*pVm),&sPath) ){
			/* Already included */
			*pNew = 0;
		}else{
			/* Insert in the corresponding container */
			rc = SySetPut(&pVm->aIncluded,(const void *)&sPath);
			if( rc != SXRET_OK ){
				SyMemBackendFree(&pVm->sAllocator,zDup);
				return rc;
			}
			*pNew = 1;
		}
	}
	SySetPut(&pVm->aFiles,(const void *)&sPath);
	return SXRET_OK;
}
/*
 * Compile and Execute a PHP script at run-time.
 * SXRET_OK is returned on sucessful evaluation.Any other return values
 * indicates failure.
 * Note that the PHP script to evaluate can be a local or remote file.In
 * either cases the [PH7_StreamReadWholeFile()] function handle all the underlying
 * operations.
 * If the [PH7_DISABLE_BUILTIN_FUNC] compile-time directive is defined,then
 * this function is a no-op.
 * Refer to the implementation of the include(),include_once() language
 * constructs for more information.
 */
static sxi32 VmExecIncludedFile(
	 ph7_context *pCtx, /* Call Context */
	 SyString *pPath,   /* Script path or URL*/
	 int IncludeOnce    /* TRUE if called from include_once() or require_once() */
	 )
{
	sxi32 rc;
#ifndef PH7_DISABLE_BUILTIN_FUNC
	const ph7_io_stream *pStream;
	SyBlob sContents;
	void *pHandle;
	ph7_vm *pVm;
	int isNew;
	/* Initialize fields */
	pVm = pCtx->pVm;
	SyBlobInit(&sContents,&pVm->sAllocator);
	isNew = 0;
	/* Extract the associated stream */
	pStream = PH7_VmGetStreamDevice(pVm,&pPath->zString,pPath->nByte);
	/*
	 * Open the file or the URL [i.e: http://ph7.symisc.net/example/hello.php"] 
	 * in a read-only mode.
	 */
	pHandle = PH7_StreamOpenHandle(pVm,pStream,pPath->zString,PH7_IO_OPEN_RDONLY,TRUE,0,TRUE,&isNew);
	if( pHandle == 0 ){
		return SXERR_IO;
	}
	rc = SXRET_OK; /* Stupid cc warning */
	if( IncludeOnce && !isNew ){
		/* Already included */
		rc = SXERR_EXISTS;
	}else{
		/* Read the whole file contents */
		rc = PH7_StreamReadWholeFile(pHandle,pStream,&sContents);
		if( rc == SXRET_OK ){
			SyString sScript;
			/* Compile and execute the script */
			SyStringInitFromBuf(&sScript,SyBlobData(&sContents),SyBlobLength(&sContents));
			VmEvalChunk(pCtx->pVm,&(*pCtx),&sScript,0,TRUE);
		}
	}
	/* Pop from the set of included file */
	(void)SySetPop(&pVm->aFiles);
	/* Close the handle */
	PH7_StreamCloseHandle(pStream,pHandle);
	/* Release the working buffer */
	SyBlobRelease(&sContents);
#else
	pCtx = 0; /* cc warning */
	pPath = 0;
	IncludeOnce = 0;
	rc = SXERR_IO;
#endif /* PH7_DISABLE_BUILTIN_FUNC */
	return rc;
}
/*
 * string get_include_path(void)
 *  Gets the current include_path configuration option.
 * Parameter
 *  None
 * Return
 *  Included paths as a string
 */
static int vm_builtin_get_include_path(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	SyString *aEntry;
	int dir_sep;
	sxu32 n;
#ifdef __WINNT__
	dir_sep = ';';
#else
	/* Assume UNIX path separator */
	dir_sep = ':';
#endif
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg); 
	/* Point to the list of import paths */
	aEntry = (SyString *)SySetBasePtr(&pVm->aPaths);
	for( n = 0 ; n < SySetUsed(&pVm->aPaths) ; n++ ){
		SyString *pEntry = &aEntry[n];
		if( n > 0 ){
			/* Append dir seprator */
			ph7_result_string(pCtx,(const char *)&dir_sep,sizeof(char));
		}
		/* Append path */
		ph7_result_string(pCtx,pEntry->zString,(int)pEntry->nByte);
	}
	return PH7_OK;
}
/*
 * string get_get_included_files(void)
 *  Gets the current include_path configuration option.
 * Parameter
 *  None
 * Return
 *  Included paths as a string
 */
static int vm_builtin_get_included_files(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SySet *pFiles = &pCtx->pVm->aFiles;
	ph7_value *pArray,*pWorker;
	SyString *pEntry;
	int c,d;
	/* Create an array and a working value */
	pArray  = ph7_context_new_array(pCtx);
	pWorker = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pWorker == 0 ){
		/* Out of memory,return null */
		ph7_result_null(pCtx);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg); 
		return PH7_OK;
	}
	c = d = '/';
#ifdef __WINNT__
	d = '\\';
#endif
	/* Iterate throw entries */
	SySetResetCursor(pFiles);
	while( SXRET_OK == SySetGetNextEntry(pFiles,(void **)&pEntry) ){
		const char *zBase,*zEnd;
		int iLen;
		/* reset the string cursor */
		ph7_value_reset_string_cursor(pWorker);
		/* Extract base name */
		zEnd = &pEntry->zString[pEntry->nByte - 1];
		/* Ignore trailing '/' */
		while( zEnd > pEntry->zString && ( (int)zEnd[0] == c || (int)zEnd[0] == d ) ){
			zEnd--;
		}
		iLen = (int)(&zEnd[1]-pEntry->zString);
		while( zEnd > pEntry->zString && ( (int)zEnd[0] != c && (int)zEnd[0] != d ) ){
			zEnd--;
		}
		zBase = (zEnd > pEntry->zString) ? &zEnd[1] : pEntry->zString;
		zEnd = &pEntry->zString[iLen];
		/* Copy entry name */
		ph7_value_string(pWorker,zBase,(int)(zEnd-zBase));
		/* Perform the insertion */
		ph7_array_add_elem(pArray,0/* Automatic index assign*/,pWorker); /* Will make it's own copy */
	}
	/* All done,return the created array */
	ph7_result_value(pCtx,pArray);
	/* Note that 'pWorker' will be automatically destroyed 
	 * by the engine as soon we return from this foreign
	 * function.
	 */
	return PH7_OK;
}
/*
 * include:
 * According to the PHP reference manual.
 *  The include() function includes and evaluates the specified file.
 *  Files are included based on the file path given or, if none is given
 *  the include_path specified.If the file isn't found in the include_path
 *  include() will finally check in the calling script's own directory
 *  and the current working directory before failing. The include()
 *  construct will emit a warning if it cannot find a file; this is different
 *  behavior from require(), which will emit a fatal error.
 *  If a path is defined � whether absolute (starting with a drive letter
 *  or \ on Windows, or / on Unix/Linux systems) or relative to the current
 *  directory (starting with . or ..) � the include_path will be ignored altogether.
 *  For example, if a filename begins with ../, the parser will look in the parent
 *  directory to find the requested file.
 *  When a file is included, the code it contains inherits the variable scope
 *  of the line on which the include occurs. Any variables available at that line
 *  in the calling file will be available within the called file, from that point forward.
 *  However, all functions and classes defined in the included file have the global scope. 
 */
static int vm_builtin_include(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyString sFile;
	sxi32 rc;
	if( nArg < 1 ){
		/* Nothing to evaluate,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* File to include */
	sFile.zString = ph7_value_to_string(apArg[0],(int *)&sFile.nByte);
	if( sFile.nByte < 1 ){
		/* Empty string,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Open,compile and execute the desired script */
	rc = VmExecIncludedFile(&(*pCtx),&sFile,FALSE);
	if( rc != SXRET_OK ){
		/* Emit a warning and return false */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,"IO error while importing: '%z'",&sFile);
		ph7_result_bool(pCtx,0);
	}
	return SXRET_OK;
}
/*
 * include_once:
 *  According to the PHP reference manual.
 *   The include_once() statement includes and evaluates the specified file during
 *   the execution of the script. This is a behavior similar to the include() 
 *   statement, with the only difference being that if the code from a file has already
 *   been included, it will not be included again. As the name suggests, it will be included
 *   just once.
 */
static int vm_builtin_include_once(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyString sFile;
	sxi32 rc;
	if( nArg < 1 ){
		/* Nothing to evaluate,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* File to include */
	sFile.zString = ph7_value_to_string(apArg[0],(int *)&sFile.nByte);
	if( sFile.nByte < 1 ){
		/* Empty string,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Open,compile and execute the desired script */
	rc = VmExecIncludedFile(&(*pCtx),&sFile,TRUE);
	if( rc == SXERR_EXISTS ){
		/* File already included,return TRUE */
		ph7_result_bool(pCtx,1);
		return SXRET_OK;
	}
	if( rc != SXRET_OK ){
		/* Emit a warning and return false */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,"IO error while importing: '%z'",&sFile);
		ph7_result_bool(pCtx,0);
 	}
	return SXRET_OK;
}
/*
 * require.
 *  According to the PHP reference manual.
 *   require() is identical to include() except upon failure it will
 *   also produce a fatal level error.
 *   In other words, it will halt the script whereas include() only
 *   emits a warning  which allows the script to continue.
 */
static int vm_builtin_require(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyString sFile;
	sxi32 rc;
	if( nArg < 1 ){
		/* Nothing to evaluate,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* File to include */
	sFile.zString = ph7_value_to_string(apArg[0],(int *)&sFile.nByte);
	if( sFile.nByte < 1 ){
		/* Empty string,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Open,compile and execute the desired script */
	rc = VmExecIncludedFile(&(*pCtx),&sFile,FALSE);
	if( rc != SXRET_OK ){
		/* Fatal,abort VM execution immediately */
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"Fatal IO error while importing: '%z'",&sFile);
		ph7_result_bool(pCtx,0);
		return PH7_ABORT;
	}
	return SXRET_OK;
}
/*
 * require_once:
 *  According to the PHP reference manual.
 *   The require_once() statement is identical to require() except PHP will check
 *   if the file has already been included, and if so, not include (require) it again.
 *   See the include_once() documentation for information about the _once behaviour
 *   and how it differs from its non _once siblings. 
 */
static int vm_builtin_require_once(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyString sFile;
	sxi32 rc;
	if( nArg < 1 ){
		/* Nothing to evaluate,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* File to include */
	sFile.zString = ph7_value_to_string(apArg[0],(int *)&sFile.nByte);
	if( sFile.nByte < 1 ){
		/* Empty string,return NULL */
		ph7_result_null(pCtx);
		return SXRET_OK;
	}
	/* Open,compile and execute the desired script */
	rc = VmExecIncludedFile(&(*pCtx),&sFile,TRUE);
	if( rc == SXERR_EXISTS ){
		/* File already included,return TRUE */
		ph7_result_bool(pCtx,1);
		return SXRET_OK;
	}
	if( rc != SXRET_OK ){
		/* Fatal,abort VM execution immediately */
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"Fatal IO error while importing: '%z'",&sFile);
		ph7_result_bool(pCtx,0);
		return PH7_ABORT;
	}
	return SXRET_OK;
}
/*
 * Section:
 *  Command line arguments processing.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * Check if a short option argument [i.e: -c] is available in the command
 * line string. Return a pointer to the start of the stream on success.
 * NULL otherwise.
 */
static const char * VmFindShortOpt(int c,const char *zIn,const char *zEnd)
{
	while( zIn < zEnd ){
		if( zIn[0] == '-' && &zIn[1] < zEnd && (int)zIn[1] == c ){
			/* Got one */
			return &zIn[1];
		}
		/* Advance the cursor */
		zIn++;
	}
	/* No such option */
	return 0;
}
/*
 * Check if a long option argument [i.e: --opt] is available in the command
 * line string. Return a pointer to the start of the stream on success.
 * NULL otherwise.
 */
static const char * VmFindLongOpt(const char *zLong,int nByte,const char *zIn,const char *zEnd)
{
	const char *zOpt;
	while( zIn < zEnd ){
		if( zIn[0] == '-' && &zIn[1] < zEnd && (int)zIn[1] == '-' ){
			zIn += 2;
			zOpt = zIn;
			while( zIn < zEnd && !SyisSpace(zIn[0]) ){
				if( zIn[0] == '=' /* --opt=val */){
					break;
				}
				zIn++;
			}
			/* Test */
			if( (int)(zIn-zOpt) == nByte && SyMemcmp(zOpt,zLong,nByte) == 0 ){
				/* Got one,return it's value */
				return zIn;
			}

		}else{
			zIn++;
		}
	}
	/* No such option */
	return 0;
}
/*
 * Long option [i.e: --opt] arguments private data structure.
 */
struct getopt_long_opt
{
	const char *zArgIn,*zArgEnd; /* Command line arguments */
	ph7_value *pWorker;  /* Worker variable*/
	ph7_value *pArray;   /* getopt() return value */
	ph7_context *pCtx;   /* Call Context */
};
/* Forward declaration */
static int VmProcessLongOpt(ph7_value *pKey,ph7_value *pValue,void *pUserData);
/*
 * Extract short or long argument option values.
 */
static void VmExtractOptArgValue(
	ph7_value *pArray,  /* getopt() return value */
	ph7_value *pWorker, /* Worker variable */
	const char *zArg,   /* Argument stream */
	const char *zArgEnd,/* End of the argument stream  */
	int need_val,       /* TRUE to fetch option argument */
	ph7_context *pCtx,  /* Call Context */
	const char *zName   /* Option name */)
{
	ph7_value_bool(pWorker,0);
	if( !need_val ){
		/* 
		 * Option does not need arguments.
		 * Insert the option name and a boolean FALSE.
		 */
		ph7_array_add_strkey_elem(pArray,(const char *)zName,pWorker); /* Will make it's own copy */
	}else{
		const char *zCur;
		/* Extract option argument */
		zArg++;
		if( zArg < zArgEnd && zArg[0] == '=' ){
			zArg++;
		}
		while( zArg < zArgEnd && (unsigned char)zArg[0] < 0xc0 && SyisSpace(zArg[0]) ){
			zArg++;
		}
		if( zArg >= zArgEnd || zArg[0] == '-' ){
			/*
			 * Argument not found.
			 * Insert the option name and a boolean FALSE.
			 */
			ph7_array_add_strkey_elem(pArray,(const char *)zName,pWorker); /* Will make it's own copy */
			return;
		}
		/* Delimit the value */
		zCur = zArg;
		if( zArg[0] == '\'' || zArg[0] == '"' ){
			int d = zArg[0];
			/* Delimt the argument */
			zArg++;
			zCur = zArg;
			while( zArg < zArgEnd ){
				if( zArg[0] == d && zArg[-1] != '\\' ){
					/* Delimiter found,exit the loop  */
					break;
				}
				zArg++;
			}
			/* Save the value */
			ph7_value_string(pWorker,zCur,(int)(zArg-zCur));
			if( zArg < zArgEnd ){ zArg++; }
		}else{
			while( zArg < zArgEnd && !SyisSpace(zArg[0]) ){
				zArg++;
			}
			/* Save the value */
			ph7_value_string(pWorker,zCur,(int)(zArg-zCur));
		}
		/*
		 * Check if we are dealing with multiple values.
		 * If so,create an array to hold them,rather than a scalar variable.
		 */
		while( zArg < zArgEnd && (unsigned char)zArg[0] < 0xc0 && SyisSpace(zArg[0]) ){
			zArg++;
		}
		if( zArg < zArgEnd && zArg[0] != '-' ){
			ph7_value *pOptArg; /* Array of option arguments */
			pOptArg = ph7_context_new_array(pCtx);
			if( pOptArg == 0 ){
				ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			}else{
				/* Insert the first value */
				ph7_array_add_elem(pOptArg,0,pWorker); /* Will make it's own copy */
				for(;;){
					if( zArg >= zArgEnd || zArg[0] == '-' ){
						/* No more value */
						break;
					}
					/* Delimit the value */
					zCur = zArg;
					if( zArg < zArgEnd && zArg[0] == '\\' ){
						zArg++;
						zCur = zArg;
					}
					while( zArg < zArgEnd && !SyisSpace(zArg[0]) ){
						zArg++;
					}
					/* Reset the string cursor */
					ph7_value_reset_string_cursor(pWorker);
					/* Save the value */
					ph7_value_string(pWorker,zCur,(int)(zArg-zCur));
					/* Insert */
					ph7_array_add_elem(pOptArg,0,pWorker); /* Will make it's own copy */
					/* Jump trailing white spaces */
					while( zArg < zArgEnd && (unsigned char)zArg[0] < 0xc0 && SyisSpace(zArg[0]) ){
						zArg++;
					}
				}
				/* Insert the option arg array */
				ph7_array_add_strkey_elem(pArray,(const char *)zName,pOptArg); /* Will make it's own copy */
				/* Safely release */
				ph7_context_release_value(pCtx,pOptArg);
			}
		}else{
			/* Single value */
			ph7_array_add_strkey_elem(pArray,(const char *)zName,pWorker); /* Will make it's own copy */
		}
	}
}
/*
 * array getopt(string $options[,array $longopts ])
 *   Gets options from the command line argument list.
 * Parameters
 *  $options
 *   Each character in this string will be used as option characters
 *   and matched against options passed to the script starting with
 *   a single hyphen (-). For example, an option string "x" recognizes
 *   an option -x. Only a-z, A-Z and 0-9 are allowed.
 *  $longopts
 *   An array of options. Each element in this array will be used as option
 *   strings and matched against options passed to the script starting with
 *   two hyphens (--). For example, an longopts element "opt" recognizes an
 *   option --opt. 
 * Return
 *  This function will return an array of option / argument pairs or FALSE
 *  on failure. 
 */
static int vm_builtin_getopt(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn,*zEnd,*zArg,*zArgIn,*zArgEnd;
	struct getopt_long_opt sLong;
	ph7_value *pArray,*pWorker;
	SyBlob *pArg;
	int nByte;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Missing/Invalid option arguments");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract option arguments */
	zIn  = ph7_value_to_string(apArg[0],&nByte);
	zEnd = &zIn[nByte];
	/* Point to the string representation of the $argv[] array */
	pArg = &pCtx->pVm->sArgv;
	/* Create a new empty array and a worker variable */
	pArray = ph7_context_new_array(pCtx);
	pWorker = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pWorker == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( SyBlobLength(pArg) < 1 ){
		/* Empty command line,return the empty array*/
		ph7_result_value(pCtx,pArray);
		/* Everything will be released automatically when we return 
		 * from this function.
		 */
		return PH7_OK;
	}
	zArgIn = (const char *)SyBlobData(pArg);
	zArgEnd = &zArgIn[SyBlobLength(pArg)];
	/* Fill the long option structure */
	sLong.pArray = pArray;
	sLong.pWorker = pWorker;
	sLong.zArgIn =  zArgIn;
	sLong.zArgEnd = zArgEnd;
	sLong.pCtx = pCtx;
	/* Start processing */
	while( zIn < zEnd ){
		int c = zIn[0];
		int need_val = 0;
		/* Advance the stream cursor */
		zIn++;
		/* Ignore non-alphanum characters */
		if( !SyisAlphaNum(c) ){
			continue;
		}
		if( zIn < zEnd && zIn[0] == ':' ){
			zIn++;
			need_val = 1;
			if( zIn < zEnd && zIn[0] == ':' ){
				zIn++;
			}
		}
		/* Find option */
		zArg = VmFindShortOpt(c,zArgIn,zArgEnd);
		if( zArg == 0 ){
			/* No such option */
			continue;
		}
		/* Extract option argument value */
		VmExtractOptArgValue(pArray,pWorker,zArg,zArgEnd,need_val,pCtx,(const char *)&c);	
	}
	if( nArg > 1 && ph7_value_is_array(apArg[1]) && ph7_array_count(apArg[1]) > 0 ){
		/* Process long options */
		ph7_array_walk(apArg[1],VmProcessLongOpt,&sLong);
	}
	/* Return the option array */
	ph7_result_value(pCtx,pArray);
	/* 
	 * Don't worry about freeing memory, everything will be released
	 * automatically as soon we return from this foreign function.
	 */
	return PH7_OK;
}
/*
 * Array walker callback used for processing long options values.
 */
static int VmProcessLongOpt(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	struct getopt_long_opt *pOpt = (struct getopt_long_opt *)pUserData;
	const char *zArg,*zOpt,*zEnd;
	int need_value = 0;
	int nByte;
	/* Value must be of type string */
	if( !ph7_value_is_string(pValue) ){
		/* Simply ignore */
		return PH7_OK;
	}
	zOpt = ph7_value_to_string(pValue,&nByte);
	if( nByte < 1 ){
		/* Empty string,ignore */
		return PH7_OK;
	}
	zEnd = &zOpt[nByte - 1];
	if( zEnd[0] == ':' ){
		char *zTerm;
		/* Try to extract a value */
		need_value = 1;
		while( zEnd >= zOpt && zEnd[0] == ':' ){
			zEnd--;
		}
		if( zOpt >= zEnd ){
			/* Empty string,ignore */
			SXUNUSED(pKey);
			return PH7_OK;
		}
		zEnd++;
		zTerm = (char *)zEnd;
		zTerm[0] = 0;
	}else{
		zEnd = &zOpt[nByte];
	}
	/* Find the option */
	zArg = VmFindLongOpt(zOpt,(int)(zEnd-zOpt),pOpt->zArgIn,pOpt->zArgEnd);
	if( zArg == 0 ){
		/* No such option,return immediately */
		return PH7_OK;
	}
	/* Try to extract a value */
	VmExtractOptArgValue(pOpt->pArray,pOpt->pWorker,zArg,pOpt->zArgEnd,need_value,pOpt->pCtx,zOpt);
	return PH7_OK;
}
/*
 * Section: 
 *  JSON encoding/decoding routines.
 * Authors:
 *  Symisc Systems,devel@symisc.net.
 *  Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Devel.
 */
/* Forward reference */
static int VmJsonArrayEncode(ph7_value *pKey,ph7_value *pValue,void *pUserData);
static int VmJsonObjectEncode(const char *zAttr,ph7_value *pValue,void *pUserData);
/* 
 * JSON encoder state is stored in an instance 
 * of the following structure.
 */
typedef struct json_private_data json_private_data;
struct json_private_data
{
	ph7_context *pCtx; /* Call context */
	int isFirst;       /* True if first encoded entry */
	int iFlags;        /* JSON encoding flags */
	int nRecCount;     /* Recursion count */
};
/*
 * Returns the JSON representation of a value.In other word perform a JSON encoding operation.
 * According to wikipedia
 * JSON's basic types are:
 *   Number (double precision floating-point format in JavaScript, generally depends on implementation)
 *   String (double-quoted Unicode, with backslash escaping)
 *   Boolean (true or false)
 *   Array (an ordered sequence of values, comma-separated and enclosed in square brackets; the values
 *    do not need to be of the same type)
 *   Object (an unordered collection of key:value pairs with the ':' character separating the key 
 *     and the value, comma-separated and enclosed in curly braces; the keys must be strings and should
 *     be distinct from each other)
 *   null (empty)
 * Non-significant white space may be added freely around the "structural characters"
 * (i.e. the brackets "[{]}", colon ":" and comma ",").
 */
static sxi32 VmJsonEncode(
	ph7_value *pIn,          /* Encode this value */
	json_private_data *pData /* Context data */
	){
		ph7_context *pCtx = pData->pCtx;
		int iFlags = pData->iFlags;
		int nByte;
		if( ph7_value_is_null(pIn) || ph7_value_is_resource(pIn)){
			/* null */
			ph7_result_string(pCtx,"null",(int)sizeof("null")-1);
		}else if( ph7_value_is_bool(pIn) ){
			int iBool = ph7_value_to_bool(pIn);
			int iLen;
			/* true/false */
			iLen = iBool ? (int)sizeof("true") : (int)sizeof("false");
			ph7_result_string(pCtx,iBool ? "true" : "false",iLen-1);
		}else if(  ph7_value_is_numeric(pIn) && !ph7_value_is_string(pIn) ){
			const char *zNum;
			/* Get a string representation of the number */
			zNum = ph7_value_to_string(pIn,&nByte);
			ph7_result_string(pCtx,zNum,nByte);
		}else if( ph7_value_is_string(pIn) ){
			if( (iFlags & JSON_NUMERIC_CHECK) &&  ph7_value_is_numeric(pIn) ){
				const char *zNum;
				/* Encodes numeric strings as numbers. */
				PH7_MemObjToReal(pIn); /* Force a numeric cast */
				/* Get a string representation of the number */
				zNum = ph7_value_to_string(pIn,&nByte);
				ph7_result_string(pCtx,zNum,nByte);
			}else{
				const char *zIn,*zEnd;
				int c;
				/* Encode the string */
				zIn = ph7_value_to_string(pIn,&nByte);
				zEnd = &zIn[nByte];
				/* Append the double quote */
				ph7_result_string(pCtx,"\"",(int)sizeof(char));
				for(;;){
					if( zIn >= zEnd ){
						/* No more input to process */
						break;
					}
					c = zIn[0];
					/* Advance the stream cursor */
					zIn++;
					if( (c == '<' || c == '>') && (iFlags & JSON_HEX_TAG) ){
						/* All < and > are converted to \u003C and \u003E */
						if( c == '<' ){
							ph7_result_string(pCtx,"\\u003C",(int)sizeof("\\u003C")-1);
						}else{
							ph7_result_string(pCtx,"\\u003E",(int)sizeof("\\u003E")-1);
						}
						continue;
					}else if( c == '&' && (iFlags & JSON_HEX_AMP) ){
						/* All &s are converted to \u0026.  */
						ph7_result_string(pCtx,"\\u0026",(int)sizeof("\\u0026")-1);
						continue;
					}else if( c == '\'' && (iFlags & JSON_HEX_APOS) ){
						/* All ' are converted to \u0027.   */
						ph7_result_string(pCtx,"\\u0027",(int)sizeof("\\u0027")-1);
						continue;
					}else if( c == '"' && (iFlags & JSON_HEX_QUOT) ){
						/* All " are converted to \u0022. */
						ph7_result_string(pCtx,"\\u0022",(int)sizeof("\\u0022")-1);
						continue;
					}
					if( c == '"' || (c == '\\' && ((iFlags & JSON_UNESCAPED_SLASHES)==0)) ){
						/* Unescape the character */
						ph7_result_string(pCtx,"\\",(int)sizeof(char));
					}
					/* Append character verbatim */
					ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
				}
				/* Append the double quote */
				ph7_result_string(pCtx,"\"",(int)sizeof(char));
			}
		}else if( ph7_value_is_array(pIn) ){
			int c = '[',d = ']';
			/* Encode the array */
			pData->isFirst = 1;
			if( iFlags & JSON_FORCE_OBJECT ){
				/* Outputs an object rather than an array */
				c = '{';
				d = '}';
			}
			/* Append the square bracket or curly braces */
			ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
			/* Iterate throw array entries */
			ph7_array_walk(pIn,VmJsonArrayEncode,pData);
			/* Append the closing square bracket or curly braces */
			ph7_result_string(pCtx,(const char *)&d,(int)sizeof(char));
		}else if( ph7_value_is_object(pIn) ){
			/* Encode the class instance */
			pData->isFirst = 1;
			/* Append the curly braces */
			ph7_result_string(pCtx,"{",(int)sizeof(char));
			/* Iterate throw class attribute */
			ph7_object_walk(pIn,VmJsonObjectEncode,pData);
			/* Append the closing curly braces  */
			ph7_result_string(pCtx,"}",(int)sizeof(char));
		}else{
			/* Can't happen */
			ph7_result_string(pCtx,"null",(int)sizeof("null")-1);
		}
		/* All done */
		return PH7_OK;
}
/*
 * The following walker callback is invoked each time we need
 * to encode an array to JSON.
 */
static int VmJsonArrayEncode(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	json_private_data *pJson = (json_private_data *)pUserData;
	if( pJson->nRecCount > 31 ){
		/* Recursion limit reached,return immediately */
		return PH7_OK;
	}
	if( !pJson->isFirst ){
		/* Append the colon first */
		ph7_result_string(pJson->pCtx,",",(int)sizeof(char));
	}
	if( pJson->iFlags & JSON_FORCE_OBJECT ){
		/* Outputs an object rather than an array */
		const char *zKey;
		int nByte;
		/* Extract a string representation of the key */
		zKey = ph7_value_to_string(pKey,&nByte);
		/* Append the key and the double colon */
		ph7_result_string_format(pJson->pCtx,"\"%.*s\":",nByte,zKey);
	}
	/* Encode the value */
	pJson->nRecCount++;
	VmJsonEncode(pValue,pJson);
	pJson->nRecCount--;
	pJson->isFirst = 0;
	return PH7_OK;
}
/*
 * The following walker callback is invoked each time we need to encode
 * a class instance [i.e: Object in the PHP jargon] to JSON.
 */
static int VmJsonObjectEncode(const char *zAttr,ph7_value *pValue,void *pUserData)
{
	json_private_data *pJson = (json_private_data *)pUserData;
	if( pJson->nRecCount > 31 ){
		/* Recursion limit reached,return immediately */
		return PH7_OK;
	}
	if( !pJson->isFirst ){
		/* Append the colon first */
		ph7_result_string(pJson->pCtx,",",(int)sizeof(char));
	}
	/* Append the attribute name and the double colon first */
	ph7_result_string_format(pJson->pCtx,"\"%s\":",zAttr);
	/* Encode the value */
	pJson->nRecCount++;
	VmJsonEncode(pValue,pJson);
	pJson->nRecCount--;
	pJson->isFirst = 0;
	return PH7_OK;
}
/*
 * string json_encode(mixed $value [, int $options = 0 ])
 *  Returns a string containing the JSON representation of value.
 * Parameters
 *  $value
 *  The value being encoded. Can be any type except a resource.
 * $options
 *  Bitmask consisting of:
 *  JSON_HEX_TAG   All < and > are converted to \u003C and \u003E.
 *  JSON_HEX_AMP   All &s are converted to \u0026. 
 *  JSON_HEX_APOS  All ' are converted to \u0027.
 *  JSON_HEX_QUOT  All " are converted to \u0022.
 *  JSON_FORCE_OBJECT  Outputs an object rather than an array.
 *  JSON_NUMERIC_CHECK Encodes numeric strings as numbers.
 *  JSON_BIGINT_AS_STRING   Not used 
 *  JSON_PRETTY_PRINT       Use whitespace in returned data to format it.
 *  JSON_UNESCAPED_SLASHES  Don't escape '/' 
 *  JSON_UNESCAPED_UNICODE  Not used.
 * Return
 *  Returns a JSON encoded string on success. FALSE otherwise
 */
static int vm_builtin_json_encode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	json_private_data sJson;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Prepare the JSON data */
	sJson.nRecCount = 0;
	sJson.pCtx = pCtx;
	sJson.isFirst = 1;
	sJson.iFlags = 0;
	if( nArg > 1 && ph7_value_is_int(apArg[1]) ){
		/* Extract option flags */
		sJson.iFlags = ph7_value_to_int(apArg[1]);
	}
	/* Perform the encoding operation */
	VmJsonEncode(apArg[0],&sJson);
	/* All done */
	return PH7_OK;
}
/*
 * int json_last_error(void)
 *  Returns the last error (if any) occurred during the last JSON encoding/decoding.
 * Parameters
 *  None
 * Return
 *  Returns an integer, the value can be one of the following constants:
 *  JSON_ERROR_NONE            No error has occurred.
 *  JSON_ERROR_DEPTH           The maximum stack depth has been exceeded. 
 *  JSON_ERROR_STATE_MISMATCH  Invalid or malformed JSON.
 *  JSON_ERROR_CTRL_CHAR  	   Control character error, possibly incorrectly encoded.
 *  JSON_ERROR_SYNTAX          Syntax error.
 *  JSON_ERROR_UTF8_CHECK      Malformed UTF-8 characters.
 */
static int vm_builtin_json_last_error(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	/* Return the error code */
	ph7_result_int(pCtx,pVm->json_rc);
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	return PH7_OK;
}
/* Possible tokens from the JSON tokenization process */
#define JSON_TK_TRUE    0x001 /* Boolean true */
#define JSON_TK_FALSE   0x002 /* Boolean false */
#define JSON_TK_STR     0x004 /* String enclosed in double quotes */
#define JSON_TK_NULL    0x008 /* null */
#define JSON_TK_NUM     0x010 /* Numeric */
#define JSON_TK_OCB     0x020 /* Open curly braces '{' */
#define JSON_TK_CCB     0x040 /* Closing curly braces '}' */
#define JSON_TK_OSB     0x080 /* Open square bracke '[' */
#define JSON_TK_CSB     0x100 /* Closing square bracket ']' */
#define JSON_TK_COLON   0x200 /* Single colon ':' */
#define JSON_TK_COMMA   0x400 /* Single comma ',' */
#define JSON_TK_INVALID 0x800 /* Unexpected token */
/* 
 * Tokenize an entire JSON input.
 * Get a single low-level token from the input file.
 * Update the stream pointer so that it points to the first
 * character beyond the extracted token.
 */
static sxi32 VmJsonTokenize(SyStream *pStream,SyToken *pToken,void *pUserData,void *pCtxData)
{
	int *pJsonErr = (int *)pUserData;
	SyString *pStr;
	int c;
	/* Ignore leading white spaces */
	while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisSpace(pStream->zText[0]) ){
		/* Advance the stream cursor */
		if( pStream->zText[0] == '\n' ){
			/* Update line counter */
			pStream->nLine++;
		}
		pStream->zText++;
	}
	if( pStream->zText >= pStream->zEnd ){
		/* End of input reached */
		SXUNUSED(pCtxData); /* cc warning */
		return SXERR_EOF;
	}
	/* Record token starting position and line */
	pToken->nLine = pStream->nLine;
	pToken->pUserData = 0;
	pStr = &pToken->sData;
	SyStringInitFromBuf(pStr,pStream->zText,0);
	if( pStream->zText[0] == '{' || pStream->zText[0] == '[' || pStream->zText[0] == '}' || pStream->zText[0] == ']'
		|| pStream->zText[0] == ':' || pStream->zText[0] == ',' ){
			/* Single character */
			c = pStream->zText[0];
			/* Set token type */
			switch(c){
			case '[': pToken->nType = JSON_TK_OSB;   break;
			case '{': pToken->nType = JSON_TK_OCB;   break;
			case '}': pToken->nType = JSON_TK_CCB;   break;
			case ']': pToken->nType = JSON_TK_CSB;   break;
			case ':': pToken->nType = JSON_TK_COLON; break;
			case ',': pToken->nType = JSON_TK_COMMA; break;
			default:
				break;
			}
			/* Advance the stream cursor */
			pStream->zText++;
	}else if( pStream->zText[0] == '"') {
		/* JSON string */
		pStream->zText++;
		pStr->zString++;
		/* Delimit the string */
		while( pStream->zText < pStream->zEnd ){
			if( pStream->zText[0] == '"' && pStream->zText[-1] != '\\' ){
				break;
			}
			if( pStream->zText[0] == '\n' ){
				/* Update line counter */
				pStream->nLine++;
			}
			pStream->zText++;
		}
		if( pStream->zText >= pStream->zEnd ){
			/* Missing closing '"' */
			pToken->nType = JSON_TK_INVALID;
			*pJsonErr = JSON_ERROR_SYNTAX;
		}else{
			pToken->nType = JSON_TK_STR;
			pStream->zText++; /* Jump the closing double quotes */
		}
	}else if( pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
		/* Number */
		pStream->zText++;
		pToken->nType = JSON_TK_NUM;
		while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
			pStream->zText++;
		}
		if( pStream->zText < pStream->zEnd ){
			c = pStream->zText[0];
			if( c == '.' ){
					/* Real number */
					pStream->zText++;
					while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
						pStream->zText++;
					}
					if( pStream->zText < pStream->zEnd ){
						c = pStream->zText[0];
						if( c=='e' || c=='E' ){
							pStream->zText++;
							if( pStream->zText < pStream->zEnd ){
								c = pStream->zText[0];
								if( c =='+' || c=='-' ){
									pStream->zText++;
								}
								while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
									pStream->zText++;
								}
							}
						}
					}					
				}else if( c=='e' || c=='E' ){
					/* Real number */
					pStream->zText++;
					if( pStream->zText < pStream->zEnd ){
						c = pStream->zText[0];
						if( c =='+' || c=='-' ){
							pStream->zText++;
						}
						while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
							pStream->zText++;
						}
					}					
				}
			}
	}else if( XLEX_IN_LEN(pStream) >= sizeof("true") -1 && 
		SyStrnicmp((const char *)pStream->zText,"true",sizeof("true")-1) == 0 ){
			/* boolean true */
			pToken->nType = JSON_TK_TRUE;
			/* Advance the stream cursor */
			pStream->zText += sizeof("true")-1;
	}else if( XLEX_IN_LEN(pStream) >= sizeof("false") -1 && 
		SyStrnicmp((const char *)pStream->zText,"false",sizeof("false")-1) == 0 ){
			/* boolean false */
			pToken->nType = JSON_TK_FALSE;
			/* Advance the stream cursor */
			pStream->zText += sizeof("false")-1;
	}else if( XLEX_IN_LEN(pStream) >= sizeof("null") -1 && 
		SyStrnicmp((const char *)pStream->zText,"null",sizeof("null")-1) == 0 ){
			/* NULL */
			pToken->nType = JSON_TK_NULL;
			/* Advance the stream cursor */
			pStream->zText += sizeof("null")-1;
	}else{
		/* Unexpected token */
		pToken->nType = JSON_TK_INVALID;
		/* Advance the stream cursor */
		pStream->zText++;
		*pJsonErr = JSON_ERROR_SYNTAX;
		/* Abort processing immediatley */
		return SXERR_ABORT;
	}
	/* record token length */
	pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
	if( pToken->nType == JSON_TK_STR ){
		pStr->nByte--;
	}
	/* Return to the lexer */
	return SXRET_OK;
}
/*
 * JSON decoded input consumer callback signature.
 */
typedef int (*ProcJsonConsumer)(ph7_context *,ph7_value *,ph7_value *,void *); 
/* 
 * JSON decoder state is kept in the following structure.
 */
typedef struct json_decoder json_decoder;
struct json_decoder
{
	ph7_context *pCtx; /* Call context */
	ProcJsonConsumer xConsumer; /* Consumer callback */ 
	void *pUserData;   /* Last argument to xConsumer() */
	int iFlags;        /* Configuration flags */
	SyToken *pIn;      /* Token stream */
	SyToken *pEnd;     /* End of the token stream */
	int rec_depth;     /* Recursion limit */
	int rec_count;     /* Current nesting level */
	int *pErr;         /* JSON decoding error if any */
};
#define JSON_DECODE_ASSOC 0x01 /* Decode a JSON object as an associative array */
/* Forward declaration */
static int VmJsonArrayDecoder(ph7_context *pCtx,ph7_value *pKey,ph7_value *pWorker,void *pUserData);
/*
 * Dequote [i.e: Resolve all backslash escapes ] a JSON string and store
 * the result in the given ph7_value.
 */
static void VmJsonDequoteString(const SyString *pStr,ph7_value *pWorker)
{
	const char *zIn = pStr->zString;
	const char *zEnd = &pStr->zString[pStr->nByte];
	const char *zCur;
	int c;
	/* Mark the value as a string */
	ph7_value_string(pWorker,"",0); /* Empty string */
	for(;;){
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '\\' ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Append chunk verbatim */
			ph7_value_string(pWorker,zCur,(int)(zIn-zCur));
		}
		zIn++;
		if( zIn >= zEnd ){
			/* End of the input reached */
			break;
		}
		c = zIn[0];
		/* Unescape the character */
		switch(c){
		case '"':  ph7_value_string(pWorker,(const char *)&c,(int)sizeof(char)); break;
		case '\\': ph7_value_string(pWorker,(const char *)&c,(int)sizeof(char)); break;
		case 'n':  ph7_value_string(pWorker,"\n",(int)sizeof(char)); break;
		case 'r':  ph7_value_string(pWorker,"\r",(int)sizeof(char)); break;
		case 't':  ph7_value_string(pWorker,"\t",(int)sizeof(char)); break;
		case 'f':  ph7_value_string(pWorker,"\f",(int)sizeof(char)); break;
		default:
			ph7_value_string(pWorker,(const char *)&c,(int)sizeof(char));
			break;
		}
		/* Advance the stream cursor */
		zIn++;
	}
}
/*
 * Returns a ph7_value holding the image of a JSON string. In other word perform a JSON decoding operation.
 * According to wikipedia
 * JSON's basic types are:
 *   Number (double precision floating-point format in JavaScript, generally depends on implementation)
 *   String (double-quoted Unicode, with backslash escaping)
 *   Boolean (true or false)
 *   Array (an ordered sequence of values, comma-separated and enclosed in square brackets; the values
 *    do not need to be of the same type)
 *   Object (an unordered collection of key:value pairs with the ':' character separating the key 
 *     and the value, comma-separated and enclosed in curly braces; the keys must be strings and should
 *     be distinct from each other)
 *   null (empty)
 * Non-significant white space may be added freely around the "structural characters" (i.e. the brackets "[{]}", colon ":" and comma ",").
 */
static sxi32 VmJsonDecode(
	json_decoder *pDecoder, /* JSON decoder */      
	ph7_value *pArrayKey    /* Key for the decoded array */
	){
	ph7_value *pWorker; /* Worker variable */
	sxi32 rc;
	/* Check if we do not nest to much */
	if( pDecoder->rec_count >= pDecoder->rec_depth ){
		/* Nesting limit reached,abort decoding immediately */
		*pDecoder->pErr = JSON_ERROR_DEPTH;
		return SXERR_ABORT;
	}
	if( pDecoder->pIn->nType & (JSON_TK_STR|JSON_TK_TRUE|JSON_TK_FALSE|JSON_TK_NULL|JSON_TK_NUM) ){
		/* Scalar value */
		pWorker = ph7_context_new_scalar(pDecoder->pCtx);
		if( pWorker == 0 ){
			ph7_context_throw_error(pDecoder->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			/* Abort the decoding operation immediately */
			return SXERR_ABORT;
		}
		/* Reflect the JSON image */
		if( pDecoder->pIn->nType & JSON_TK_NULL ){
			/* Nullify the value.*/
			ph7_value_null(pWorker);
		}else if( pDecoder->pIn->nType & (JSON_TK_TRUE|JSON_TK_FALSE) ){
			/* Boolean value */
			ph7_value_bool(pWorker,(pDecoder->pIn->nType & JSON_TK_TRUE) ? 1 : 0 );
		}else if( pDecoder->pIn->nType & JSON_TK_NUM ){
			SyString *pStr = &pDecoder->pIn->sData;
			/* 
			 * Numeric value.
			 * Get a string representation first then try to get a numeric
			 * value.
			 */
			ph7_value_string(pWorker,pStr->zString,(int)pStr->nByte);
			/* Obtain a numeric representation */
			PH7_MemObjToNumeric(pWorker);
		}else{
			/* Dequote the string */
			VmJsonDequoteString(&pDecoder->pIn->sData,pWorker);
		}
		/* Invoke the consumer callback */
		rc = pDecoder->xConsumer(pDecoder->pCtx,pArrayKey,pWorker,pDecoder->pUserData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		/* All done,advance the stream cursor */
		pDecoder->pIn++;
	}else if( pDecoder->pIn->nType & JSON_TK_OSB /*'[' */) {
		ProcJsonConsumer xOld;
		void *pOld;
		/* Array representation*/
		pDecoder->pIn++;
		/* Create a working array */
		pWorker = ph7_context_new_array(pDecoder->pCtx);
		if( pWorker == 0 ){
			ph7_context_throw_error(pDecoder->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			/* Abort the decoding operation immediately */
			return SXERR_ABORT;
		}
		/* Save the old consumer */
		xOld = pDecoder->xConsumer;
		pOld = pDecoder->pUserData;
		/* Set the new consumer */
		pDecoder->xConsumer = VmJsonArrayDecoder;
		pDecoder->pUserData = pWorker;
		/* Decode the array */
		for(;;){
			/* Jump trailing comma. Note that the standard PHP engine will not let you
			 * do this.
			 */
			while( (pDecoder->pIn < pDecoder->pEnd) && (pDecoder->pIn->nType & JSON_TK_COMMA) ){
				pDecoder->pIn++;
			}
			if( pDecoder->pIn >= pDecoder->pEnd || (pDecoder->pIn->nType & JSON_TK_CSB) /*']'*/ ){
				if( pDecoder->pIn < pDecoder->pEnd ){
					pDecoder->pIn++; /* Jump the trailing ']' */
				}
				break;
			}
			/* Recurse and decode the entry */
			pDecoder->rec_count++;
			rc = VmJsonDecode(pDecoder,0);
			pDecoder->rec_count--;
			if( rc == SXERR_ABORT ){
				/* Abort processing immediately */
				return SXERR_ABORT;
			}
			/*The cursor is automatically advanced by the VmJsonDecode() function */
			if( (pDecoder->pIn < pDecoder->pEnd) &&
				((pDecoder->pIn->nType & (JSON_TK_CSB/*']'*/|JSON_TK_COMMA/*','*/))==0) ){
					/* Unexpected token,abort immediatley */
					*pDecoder->pErr = JSON_ERROR_SYNTAX;
					return SXERR_ABORT;
			}
		}
		/* Restore the old consumer */
		pDecoder->xConsumer = xOld;
		pDecoder->pUserData = pOld;
		/* Invoke the old consumer on the decoded array */
		xOld(pDecoder->pCtx,pArrayKey,pWorker,pOld);
	}else if( pDecoder->pIn->nType & JSON_TK_OCB /*'{' */) {
		ProcJsonConsumer xOld;
		ph7_value *pKey;
		void *pOld;
		/* Object representation*/
		pDecoder->pIn++;
		/* Return the object as an associative array */
		if( (pDecoder->iFlags & JSON_DECODE_ASSOC) == 0 ){
			ph7_context_throw_error(pDecoder->pCtx,PH7_CTX_WARNING,
				"JSON Objects are always returned as an associative array"
				);
		}
		/* Create a working array */
		pWorker = ph7_context_new_array(pDecoder->pCtx);
		pKey = ph7_context_new_scalar(pDecoder->pCtx);
		if( pWorker == 0 || pKey == 0){
			ph7_context_throw_error(pDecoder->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			/* Abort the decoding operation immediately */
			return SXERR_ABORT;
		}
		/* Save the old consumer */
		xOld = pDecoder->xConsumer;
		pOld = pDecoder->pUserData;
		/* Set the new consumer */
		pDecoder->xConsumer = VmJsonArrayDecoder;
		pDecoder->pUserData = pWorker;
		/* Decode the object */
		for(;;){
			/* Jump trailing comma. Note that the standard PHP engine will not let you
			 * do this.
			 */
			while( (pDecoder->pIn < pDecoder->pEnd) && (pDecoder->pIn->nType & JSON_TK_COMMA) ){
				pDecoder->pIn++;
			}
			if( pDecoder->pIn >= pDecoder->pEnd || (pDecoder->pIn->nType & JSON_TK_CCB) /*'}'*/ ){
				if( pDecoder->pIn < pDecoder->pEnd ){
					pDecoder->pIn++; /* Jump the trailing ']' */
				}
				break;
			}
			if( (pDecoder->pIn->nType & JSON_TK_STR) == 0 || &pDecoder->pIn[1] >= pDecoder->pEnd
				|| (pDecoder->pIn[1].nType & JSON_TK_COLON) == 0){
					/* Syntax error,return immediately */
					*pDecoder->pErr = JSON_ERROR_SYNTAX;
					return SXERR_ABORT;
			}
			/* Dequote the key */
			VmJsonDequoteString(&pDecoder->pIn->sData,pKey);
			/* Jump the key and the colon */
			pDecoder->pIn += 2; 
			/* Recurse and decode the value */
			pDecoder->rec_count++;
			rc = VmJsonDecode(pDecoder,pKey);
			pDecoder->rec_count--;
			if( rc == SXERR_ABORT ){
				/* Abort processing immediately */
				return SXERR_ABORT;
			}
			/* Reset the internal buffer of the key */
			ph7_value_reset_string_cursor(pKey);
			/*The cursor is automatically advanced by the VmJsonDecode() function */
		}
		/* Restore the old consumer */
		pDecoder->xConsumer = xOld;
		pDecoder->pUserData = pOld;
		/* Invoke the old consumer on the decoded object*/
		xOld(pDecoder->pCtx,pArrayKey,pWorker,pOld);
		/* Release the key */
		ph7_context_release_value(pDecoder->pCtx,pKey);
	}else{
		/* Unexpected token */
		return SXERR_ABORT; /* Abort immediately */
	}
	/* Release the worker variable */
	ph7_context_release_value(pDecoder->pCtx,pWorker);
	return SXRET_OK;
}
/*
 * The following JSON decoder callback is invoked each time
 * a JSON array representation [i.e: [15,"hello",FALSE] ]
 * is being decoded.
 */
static int VmJsonArrayDecoder(ph7_context *pCtx,ph7_value *pKey,ph7_value *pWorker,void *pUserData)
{
	ph7_value *pArray = (ph7_value *)pUserData;
	/* Insert the entry */
	ph7_array_add_elem(pArray,pKey,pWorker); /* Will make it's own copy */
	SXUNUSED(pCtx); /* cc warning */
	/* All done */
	return SXRET_OK;
}
/*
 * Standard JSON decoder callback.
 */
static int VmJsonDefaultDecoder(ph7_context *pCtx,ph7_value *pKey,ph7_value *pWorker,void *pUserData)
{
	/* Return the value directly */
	ph7_result_value(pCtx,pWorker); /* Will make it's own copy */
	SXUNUSED(pKey); /* cc warning */
	SXUNUSED(pUserData);
	/* All done */
	return SXRET_OK;
}
/*
 * mixed json_decode(string $json[,bool $assoc = false[,int $depth = 32[,int $options = 0 ]]])
 *  Takes a JSON encoded string and converts it into a PHP variable.
 * Parameters
 *  $json
 *    The json string being decoded.
 * $assoc
 *   When TRUE, returned objects will be converted into associative arrays.
 * $depth
 *   User specified recursion depth.
 * $options
 *   Bitmask of JSON decode options. Currently only JSON_BIGINT_AS_STRING is supported 
 * (default is to cast large integers as floats)
 * Return
 *  The value encoded in json in appropriate PHP type. Values true, false and null (case-insensitive)
 *  are returned as TRUE, FALSE and NULL respectively. NULL is returned if the json cannot be decoded
 *  or if the encoded data is deeper than the recursion limit.
 */
static int vm_builtin_json_decode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vm *pVm = pCtx->pVm;
	json_decoder sDecoder;
	const char *zIn;
	SySet sToken;
	SyLex sLex;
	int nByte;
	sxi32 rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments, return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the JSON string */
	zIn = ph7_value_to_string(apArg[0],&nByte);
	if( nByte < 1 ){
		/* Empty string,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Clear JSON error code */
	pVm->json_rc = JSON_ERROR_NONE;
	/* Tokenize the input */
	SySetInit(&sToken,&pVm->sAllocator,sizeof(SyToken));
	SyLexInit(&sLex,&sToken,VmJsonTokenize,&pVm->json_rc);
	SyLexTokenizeInput(&sLex,zIn,(sxu32)nByte,0,0,0);
	if( pVm->json_rc != JSON_ERROR_NONE ){
		/* Something goes wrong while tokenizing input. [i.e: Unexpected token] */
		SyLexRelease(&sLex);
		SySetRelease(&sToken);
		/* return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the decoder */
	sDecoder.pCtx = pCtx;
	sDecoder.pErr = &pVm->json_rc;
	sDecoder.pIn = (SyToken *)SySetBasePtr(&sToken);
	sDecoder.pEnd = &sDecoder.pIn[SySetUsed(&sToken)];
	sDecoder.iFlags = 0;
	if( nArg > 1 && ph7_value_to_bool(apArg[1]) != 0 ){
		/* Returned objects will be converted into associative arrays */
		sDecoder.iFlags |= JSON_DECODE_ASSOC;
	}
	sDecoder.rec_depth = 32;
	if( nArg > 2 && ph7_value_is_int(apArg[2]) ){
		int nDepth = ph7_value_to_int(apArg[2]);
		if( nDepth > 1 && nDepth < 32 ){
			sDecoder.rec_depth = nDepth;
		}
	}
	sDecoder.rec_count = 0;
	/* Set a default consumer */
	sDecoder.xConsumer = VmJsonDefaultDecoder;
	sDecoder.pUserData = 0;
	/* Decode the raw JSON input */
	rc = VmJsonDecode(&sDecoder,0);
	if( rc == SXERR_ABORT ||  pVm->json_rc != JSON_ERROR_NONE ){
		/* 
		 * Something goes wrong while decoding JSON input.Return NULL.
		 */
		ph7_result_null(pCtx);
	}
	/* Clean-up the mess left behind */
	SyLexRelease(&sLex);
	SySetRelease(&sToken);
	/* All done */
	return PH7_OK;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
/*
 * XML processing Functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Devel.
 */
enum ph7_xml_handler_id{
	PH7_XML_START_TAG = 0, /* Start element handlers ID */
	PH7_XML_END_TAG,       /* End element handler ID*/
	PH7_XML_CDATA,         /* Character data handler ID*/
	PH7_XML_PI,            /* Processing instruction (PI) handler ID*/
	PH7_XML_DEF,           /* Default handler ID */
	PH7_XML_UNPED,         /* Unparsed entity declaration handler */
	PH7_XML_ND,            /* Notation declaration handler ID*/
	PH7_XML_EER,           /* External entity reference handler */
	PH7_XML_NS_START,      /* Start namespace declaration handler */
	PH7_XML_NS_END         /* End namespace declaration handler */
};
#define XML_TOTAL_HANDLER (PH7_XML_NS_END + 1)
/* An instance of the following structure describe a working
 * XML engine instance.
 */
typedef struct ph7_xml_engine ph7_xml_engine;
struct ph7_xml_engine
{
	ph7_vm *pVm;         /* VM that own this instance */
	ph7_context *pCtx;   /* Call context */
	SyXMLParser sParser; /* Underlying XML parser */
	ph7_value aCB[XML_TOTAL_HANDLER]; /* User-defined callbacks */
	ph7_value sParserValue; /* ph7_value holding this instance which is forwarded
							  * as the first argument to the user callbacks.
							  */
	int ns_sep;      /* Namespace separator */
	SyBlob sErr;     /* Error message consumer */
	sxi32 iErrCode;  /* Last error code */
	sxi32 iNest;     /* Nesting level */
	sxu32 nLine;     /* Last processed line */
	sxu32 nMagic;    /* Magic number so that we avoid misuse  */
};
#define XML_ENGINE_MAGIC 0x851EFC52
#define IS_INVALID_XML_ENGINE(XML) (XML == 0 || (XML)->nMagic != XML_ENGINE_MAGIC)
/* 
 * Allocate and initialize an XML engine.
 */
static ph7_xml_engine * VmCreateXMLEngine(ph7_context *pCtx,int process_ns,int ns_sep)
{
	ph7_xml_engine *pEngine;
	ph7_vm *pVm = pCtx->pVm;
	ph7_value *pValue;
	sxu32 n;
	/* Allocate a new instance */
	pEngine = (ph7_xml_engine *)SyMemBackendAlloc(&pVm->sAllocator,sizeof(ph7_xml_engine));
	if( pEngine == 0 ){
		/* Out of memory */
		return 0;
	}
	/* Zero the structure */
	SyZero(pEngine,sizeof(ph7_xml_engine));
	/* Initialize fields */
	pEngine->pVm = pVm;
	pEngine->pCtx = 0;
	pEngine->ns_sep = ns_sep;
	SyXMLParserInit(&pEngine->sParser,&pVm->sAllocator,process_ns ? SXML_ENABLE_NAMESPACE : 0);
	SyBlobInit(&pEngine->sErr,&pVm->sAllocator);
	PH7_MemObjInit(pVm,&pEngine->sParserValue);
	for( n = 0 ; n < SX_ARRAYSIZE(pEngine->aCB) ; ++n ){
		pValue = &pEngine->aCB[n];
		/* NULLIFY the array entries,until someone register an event handler */
		PH7_MemObjInit(&(*pVm),pValue);
	}
	ph7_value_resource(&pEngine->sParserValue,pEngine);
	pEngine->iErrCode = SXML_ERROR_NONE;
	/* Finally set the magic number */
	pEngine->nMagic = XML_ENGINE_MAGIC;
	return pEngine;
}
/*
 * Release an XML engine.
 */
static void VmReleaseXMLEngine(ph7_xml_engine *pEngine)
{
	ph7_vm *pVm = pEngine->pVm;
	ph7_value *pValue;
	sxu32 n;
	/* Release fields */
	SyBlobRelease(&pEngine->sErr);
	SyXMLParserRelease(&pEngine->sParser);
	PH7_MemObjRelease(&pEngine->sParserValue);
	for( n = 0 ; n < SX_ARRAYSIZE(pEngine->aCB) ; ++n ){
		pValue = &pEngine->aCB[n];
		PH7_MemObjRelease(pValue);
	}
	pEngine->nMagic = 0x2621;
	/* Finally,release the whole instance */
	SyMemBackendFree(&pVm->sAllocator,pEngine);
}
/*
 * resource xml_parser_create([ string $encoding ])
 *  Create an UTF-8 XML parser.
 * Parameter
 *  $encoding
 *   (Only UTF-8 encoding is used) 
 * Return
 *  Returns a resource handle for the new XML parser.
 */
static int vm_builtin_xml_parser_create(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	/* Allocate a new instance */
	pEngine = VmCreateXMLEngine(&(*pCtx),0,':');
	if( pEngine == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		/* Return null */
		ph7_result_null(pCtx);
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		return PH7_OK;
	}
	/* Return the engine as a resource */
	ph7_result_resource(pCtx,pEngine);
	return PH7_OK;
}
/*
 * resource xml_parser_create_ns([ string $encoding[,string $separator = ':']])
 *  Create an UTF-8 XML parser with namespace support.
 * Parameter
 *  $encoding
 *   (Only UTF-8 encoding is supported) 
 *  $separtor
 *   Namespace separator (a single character)
 * Return
 *  Returns a resource handle for the new XML parser.
 */
static int vm_builtin_xml_parser_create_ns(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	int ns_sep = ':';
	if( nArg > 1 && ph7_value_is_string(apArg[1]) ){
		const char *zSep = ph7_value_to_string(apArg[1],0);
		if( zSep[0] != 0 ){
			ns_sep = zSep[0];
		}
	}
	/* Allocate a new instance */
	pEngine = VmCreateXMLEngine(&(*pCtx),TRUE,ns_sep);
	if( pEngine == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		/* Return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Return the engine as a resource */
	ph7_result_resource(pCtx,pEngine);
	return PH7_OK;
}
/*
 * bool xml_parser_free(resource $parser)
 *  Release an XML engine.
 * Parameter
 *  $parser
 *   A reference to the XML parser to free. 
 * Return
 *  This function returns FALSE if parser does not refer
 *  to a valid parser, or else it frees the parser and returns TRUE.
 */
static int vm_builtin_xml_parser_free(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Safely release the engine */
	VmReleaseXMLEngine(pEngine);
	/* Return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_element_handler(resource $parser,callback $start_element_handler,[callback $end_element_handler])
 * Sets the element handler functions for the XML parser. start_element_handler and end_element_handler
 * are strings containing the names of functions.
 * Parameters
 *  $parser
 *   A reference to the XML parser to set up start and end element handler functions.
 *  $start_element_handler
 *    The function named by start_element_handler must accept three parameters:
 *    start_element_handler(resource $parser,string $name,array $attribs)
 *    $parser
 *      The first parameter, parser, is a reference to the XML parser calling the handler. 
 *   $name
 *      The second parameter, name, contains the name of the element for which this handler
 *		is called.If case-folding is in effect for this parser, the element name will be in uppercase letters. 
 *  $attribs
 *      The third parameter, attribs, contains an associative array with the element's attributes (if any).
 *		The keys of this array are the attribute names, the values are the attribute values.
 *      Attribute names are case-folded on the same criteria as element names.Attribute values are not case-folded.
 *      The original order of the attributes can be retrieved by walking through attribs the normal way, using each().
 *      The first key in the array was the first attribute, and so on. 
 *      Note: Instead of a function name, an array containing an object reference and a method name can also be supplied.
 * $end_element_handler
 *     The function named by end_element_handler must accept two parameters:
 *     end_element_handler(resource $parser,string $name)
 *    $parser
 *      The first parameter, parser, is a reference to the XML parser calling the handler. 
 *   $name
 *      The second parameter, name, contains the name of the element for which this handler
 *      is called.If case-folding is in effect for this parser, the element name will be in uppercase
 *      letters. 
 *      If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
 * Return
 * TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_element_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the start_element_handler callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_START_TAG]);
		if( nArg > 2 ){
			/* Save the end_element_handler callback for later invocation */
			PH7_MemObjStore(apArg[2]/* User callback*/,&pEngine->aCB[PH7_XML_END_TAG]);
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_character_data_handler(resource $parser,callback $handler)
 *  Sets the character data handler function for the XML parser parser. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept two parameters:
 *   handler(resource $parser,string $data)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $data
 *   The second parameter, data, contains the character data as a string. 
 *   Character data handler is called for every piece of a text in the XML document.
 *   It can be called multiple times inside each fragment (e.g. for non-ASCII strings).
 *   If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
 *   Note: Instead of a function name, an array containing an object reference and a method name 
 *   can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_character_data_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_CDATA]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_default_handler(resource $parser,callback $handler)
 *  Set up default handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept two parameters:
 *   handler(resource $parser,string $data)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $data
 *   The second parameter, data, contains the character data.This may be the XML declaration
 *   document type declaration, entities or other data for which no other handler exists.
 *   Note: Instead of a function name, an array containing an object reference and a method name
 *   can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_default_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_DEF]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_end_namespace_decl_handler(resource $parser,callback $handler)
 *  Set up end namespace declaration handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept two parameters:
 *   handler(resource $parser,string $prefix)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $prefix
 *   The prefix is a string used to reference the namespace within an XML object.
 *   Note: Instead of a function name, an array containing an object reference and a method name
 *   can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_end_namespace_decl_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_NS_END]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_start_namespace_decl_handler(resource $parser,callback $handler)
 *  Set up start namespace declaration handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept two parameters:
 *   handler(resource $parser,string $prefix,string $uri)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $prefix
 *   The prefix is a string used to reference the namespace within an XML object.
 *  $uri
 *    Uniform Resource Identifier (URI) of namespace. 
 *   Note: Instead of a function name, an array containing an object reference and a method name
 *   can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_start_namespace_decl_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_NS_START]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_processing_instruction_handler(resource $parser,callback $handler)
 *  Set up processing instruction (PI) handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept three parameters:
 *   handler(resource $parser,string $target,string $data)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $target
 *   The second parameter, target, contains the PI target. 
 *  $data
     The third parameter, data, contains the PI data. 
 *   Note: Instead of a function name, an array containing an object reference and a method name
 *   can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_processing_instruction_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_PI]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_unparsed_entity_decl_handler(resource $parser,callback $handler)
 *  Set up unparsed entity declaration handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept six parameters:
 *  handler(resource $parser,string $entity_name,string $base,string $system_id,string $public_id,string $notation_name)
 *  $parser
 *   The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $entity_name
 *   The name of the entity that is about to be defined. 
 *  $base
 *   This is the base for resolving the system identifier (systemId) of the external entity.
 *   Currently this parameter will always be set to an empty string. 
 *  $system_id
 *   System identifier for the external entity. 
 *  $public_id
 *    Public identifier for the external entity. 
 *  $notation_name
 *    Name of the notation of this entity (see xml_set_notation_decl_handler()). 
 *   Note: Instead of a function name, an array containing an object reference and a method name
 *   can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_unparsed_entity_decl_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_UNPED]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_notation_decl_handler(resource $parser,callback $handler)
 *  Set up notation declaration handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept five parameters:
 *  handler(resource $parser,string $entity_name,string $base,string $system_id,string $public_id)
 *  $parser
 *   The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $entity_name
 *   The name of the entity that is about to be defined. 
 *  $base
 *   This is the base for resolving the system identifier (systemId) of the external entity.
 *   Currently this parameter will always be set to an empty string. 
 *  $system_id
 *   System identifier for the external entity. 
 *  $public_id
 *    Public identifier for the external entity.
 *  Note: Instead of a function name, an array containing an object reference and a method name
 *  can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_notation_decl_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_ND]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool xml_set_external_entity_ref_handler(resource $parser,callback $handler)
 *  Set up external entity reference handler. 
 * Parameters
 * $parser
 *   A reference to the XML parser to set up character data handler function.
 * $handler
 *  handler is a string containing the name of the callback.
 *  The function named by handler must accept five parameters:
 *   handler(resource $parser,string $open_entity_names,string $base,string $system_id,string $public_id)
 *  $parser
 *   The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $open_entity_names
 *   The second parameter, open_entity_names, is a space-separated list of the names 
 *   of the entities that are open for the parse of this entity (including the name of the referenced entity). 
 *  $base
 *   This is the base for resolving the system identifier (system_id) of the external entity.
 *   Currently this parameter will always be set to an empty string. 
 *  $system_id
 *   The fourth parameter, system_id, is the system identifier as specified in the entity declaration. 
 *  $public_id
 *   The fifth parameter, public_id, is the public identifier as specified in the entity declaration
 *   or an empty string if none was specified; the whitespace in the public identifier will have been
 *   normalized as required by the XML spec. 
 * Note: Instead of a function name, an array containing an object reference and a method name
 * can also be supplied.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int vm_builtin_xml_set_external_entity_ref_handler(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Save the user callback for later invocation */
		PH7_MemObjStore(apArg[1]/* User callback*/,&pEngine->aCB[PH7_XML_EER]);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * int xml_get_current_line_number(resource $parser)
 *  Gets the current line number for the given XML parser.
 * Parameters
 * $parser
 *   A reference to the XML parser.
 * Return
 *  This function returns FALSE if parser does not refer
 *  to a valid parser, or else it returns which line the parser
 *  is currently at in its data buffer. 
 */
static int vm_builtin_xml_get_current_line_number(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Return the line number */
	ph7_result_int(pCtx,(int)pEngine->nLine);
	return PH7_OK;
}
/*
 * int xml_get_current_byte_index(resource $parser)
 *  Gets the current byte index of the given XML parser.
 * Parameters
 * $parser
 *   A reference to the XML parser.
 * Return
 *  This function returns FALSE if parser does not refer to a valid 
 *  parser, or else it returns which byte index the parser is currently
 *  at in its data buffer (starting at 0).
 */
static int vm_builtin_xml_get_current_byte_index(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	SyStream *pStream;
	SyToken *pToken;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the current processed token */
	pToken = (SyToken *)SySetPeekCurrentEntry(&pEngine->sParser.sToken);
	if( pToken == 0 ){
		/* Stream not yet processed */
		ph7_result_int(pCtx,0);
		return 0;
	}
	/* Point to the input stream */
	pStream = &pEngine->sParser.sLex.sStream;
	/* Return the byte index */
	ph7_result_int64(pCtx,(ph7_int64)(pToken->sData.zString-(const char *)pStream->zInput));
	return PH7_OK;
}
/*
 * bool xml_set_object(resource $parser,object &$object)
 *  Use XML Parser within an object.
 * NOTE
 *  This function is depreceated and is a no-op.
 * Parameters
 * $parser
 *   A reference to the XML parser.
 * $object
 *  The object where to use the XML parser.
 * Return
 * Always FALSE.
 */
static int vm_builtin_xml_set_object(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) || !ph7_value_is_object(apArg[1]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/*  Throw a notice and return */ 
	ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"This function is depreceated and is a no-op."
		"In order to mimic this behaviour,you can supply instead of a function name an array "
		"containing an object reference and a method name."
		);
	/* Return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * int xml_get_current_column_number(resource $parser)
 *  Gets the current column number of the given XML parser.
 * Parameters
 * $parser
 *   A reference to the XML parser.
 * Return
 *  This function returns FALSE if parser does not refer to a valid parser, or else it returns
 *  which column on the current line (as given by xml_get_current_line_number()) the parser
 *  is currently at. 
 */
static int vm_builtin_xml_get_current_column_number(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	SyStream *pStream;
	SyToken *pToken;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the current processed token */
	pToken = (SyToken *)SySetPeekCurrentEntry(&pEngine->sParser.sToken);
	if( pToken == 0 ){
		/* Stream not yet processed */
		ph7_result_int(pCtx,0);
		return 0;
	}
	/* Point to the input stream */
	pStream = &pEngine->sParser.sLex.sStream;
	/* Return the byte index */
	ph7_result_int64(pCtx,(ph7_int64)(pToken->sData.zString-(const char *)pStream->zInput)/80);
	return PH7_OK;
}
/*
 * int xml_get_error_code(resource $parser)
 *  Get XML parser error code.
 * Parameters
 * $parser
 *   A reference to the XML parser.
 * Return
 *  This function returns FALSE if parser does not refer to a valid 
 *  parser, or else it returns one of the error codes listed in the error
 *  codes section.
 */
static int vm_builtin_xml_get_error_code(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Return the error code if any */
	ph7_result_int(pCtx,pEngine->iErrCode);
	return PH7_OK;
}
/*
 * XML parser event callbacks
 * Each time the unserlying XML parser extract a single token
 * from the input,one of the following callbacks are invoked.
 * IMP-XML-ENGINE-07-07-2012 22:02 FreeBSD [chm@symisc.net]
 */
/*
 * Create a scalar ph7_value holding the value
 * of an XML tag/attribute/CDATA and so on.
 */
static ph7_value * VmXMLValue(ph7_xml_engine *pEngine,SyXMLRawStr *pXML,SyXMLRawStr *pNsUri)
{
	ph7_value *pValue;
	/* Allocate a new scalar variable */
	pValue = ph7_context_new_scalar(pEngine->pCtx);
	if( pValue == 0 ){
		ph7_context_throw_error(pEngine->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		return 0;
	}
	if( pNsUri && pNsUri->nByte > 0 ){
		/* Append namespace URI and the separator */
		ph7_value_string_format(pValue,"%.*s%c",pNsUri->nByte,pNsUri->zString,pEngine->ns_sep);
	}
	/* Copy the tag value */
	ph7_value_string(pValue,pXML->zString,(int)pXML->nByte);
	return pValue;
}
/*
 * Create a 'ph7_value' of type array holding the values
 * of an XML tag attributes.
 */
static ph7_value * VmXMLAttrValue(ph7_xml_engine *pEngine,SyXMLRawStr *aAttr,sxu32 nAttr)
{
	ph7_value *pArray;
	/* Create an empty array */
	pArray = ph7_context_new_array(pEngine->pCtx);
	if( pArray == 0 ){
		ph7_context_throw_error(pEngine->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		return 0;
	}
	if( nAttr > 0 ){
		ph7_value *pKey,*pValue;
		sxu32 n;
		/* Create worker variables */
		pKey = ph7_context_new_scalar(pEngine->pCtx);
		pValue = ph7_context_new_scalar(pEngine->pCtx);
		if( pKey == 0 || pValue == 0 ){
			ph7_context_throw_error(pEngine->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			return 0;
		}
		/* Copy attributes */
		for( n = 0 ; n < nAttr ; n += 2 ){
			/* Reset string cursors */
			ph7_value_reset_string_cursor(pKey);
			ph7_value_reset_string_cursor(pValue);
			/* Copy attribute name and it's associated value */
			ph7_value_string(pKey,aAttr[n].zString,(int)aAttr[n].nByte); /* Attribute name */
			ph7_value_string(pValue,aAttr[n+1].zString,(int)aAttr[n+1].nByte); /* Attribute value */
			/* Insert in the array */
			ph7_array_add_elem(pArray,pKey,pValue); /* Will make it's own copy */
		}
		/* Release the worker variables */
		ph7_context_release_value(pEngine->pCtx,pKey);
		ph7_context_release_value(pEngine->pCtx,pValue);
	}
	/* Return the freshly created array */
	return pArray;
}
/*
 * Start element handler.
 * The user defined callback must accept three parameters:
 *    start_element_handler(resource $parser,string $name,array $attribs )
 *    $parser
 *      The first parameter, parser, is a reference to the XML parser calling the handler. 
 *    $name
 *      The second parameter, name, contains the name of the element for which this handler
 *		is called.If case-folding is in effect for this parser, the element name will be in uppercase letters. 
 *    $attribs
 *      The third parameter, attribs, contains an associative array with the element's attributes (if any).
 *		The keys of this array are the attribute names, the values are the attribute values.
 *      Attribute names are case-folded on the same criteria as element names.Attribute values are not case-folded.
 *      The original order of the attributes can be retrieved by walking through attribs the normal way, using each().
 *      The first key in the array was the first attribute, and so on. 
 *      Note: Instead of a function name, an array containing an object reference and a method name can also be supplied.
 */
static sxi32 VmXMLStartElementHandler(SyXMLRawStr *pStart,SyXMLRawStr *pNS,sxu32 nAttr,SyXMLRawStr *aAttr,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	ph7_value *pCallback,*pTag,*pAttr;
	/* Point to the target user defined callback */
	pCallback = &pEngine->aCB[PH7_XML_START_TAG];
	/* Make sure the given callback is callable */
	if( !PH7_VmIsCallable(pEngine->pVm,pCallback,0) ){
		/* Not callable,return immediately*/
		return SXRET_OK;
	}
	/* Create a ph7_value holding the tag name */
	pTag = VmXMLValue(pEngine,pStart,pNS);
	/* Create a ph7_value holding the tag attributes */
	pAttr = VmXMLAttrValue(pEngine,aAttr,nAttr);
	if( pTag == 0  || pAttr == 0 ){
		SXUNUSED(pNS); /* cc warning */
		/* Out of mem,return immediately */
		return SXRET_OK;
	}
	/* Invoke the user callback */
	PH7_VmCallUserFunctionAp(pEngine->pVm,pCallback,0,&pEngine->sParserValue,pTag,pAttr,0);
	/* Clean-up the mess left behind */
	ph7_context_release_value(pEngine->pCtx,pTag);
	ph7_context_release_value(pEngine->pCtx,pAttr);
	return SXRET_OK;
}
/*
 * End element handler.
 * The user defined callback must accept two parameters:
 *  end_element_handler(resource $parser,string $name)
 *  $parser
 *   The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $name
 *   The second parameter, name, contains the name of the element for which this handler is called.
 *   If case-folding is in effect for this parser, the element name will be in uppercase letters.
 *   Note: Instead of a function name, an array containing an object reference and a method name
 *   can also be supplied.
 */
static sxi32 VmXMLEndElementHandler(SyXMLRawStr *pEnd,SyXMLRawStr *pNS,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	ph7_value *pCallback,*pTag;
	/* Point to the target user defined callback */
	pCallback = &pEngine->aCB[PH7_XML_END_TAG];
	/* Make sure the given callback is callable */
	if( !PH7_VmIsCallable(pEngine->pVm,pCallback,0) ){
		/* Not callable,return immediately*/
		return SXRET_OK;
	}
	/* Create a ph7_value holding the tag name */
	pTag = VmXMLValue(pEngine,pEnd,pNS);
	if( pTag == 0  ){
		SXUNUSED(pNS); /* cc warning */
		/* Out of mem,return immediately */
		return SXRET_OK;
	}
	/* Invoke the user callback */
	PH7_VmCallUserFunctionAp(pEngine->pVm,pCallback,0,&pEngine->sParserValue,pTag,0);
	/* Clean-up the mess left behind */
	ph7_context_release_value(pEngine->pCtx,pTag);
	return SXRET_OK;
}
/*
 * Character data handler.
 *  The user defined callback must accept two parameters:
 *  handler(resource $parser,string $data)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $data
 *   The second parameter, data, contains the character data as a string. 
 *   Character data handler is called for every piece of a text in the XML document.
 *   It can be called multiple times inside each fragment (e.g. for non-ASCII strings).
 *   If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
 *   Note: Instead of a function name, an array containing an object reference and a method name can also be supplied.
 */
static sxi32 VmXMLTextHandler(SyXMLRawStr *pText,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	ph7_value *pCallback,*pData;
	/* Point to the target user defined callback */
	pCallback = &pEngine->aCB[PH7_XML_CDATA];
	/* Make sure the given callback is callable */
	if( !PH7_VmIsCallable(pEngine->pVm,pCallback,0) ){
		/* Not callable,return immediately*/
		return SXRET_OK;
	}
	/* Create a ph7_value holding the data */
	pData = VmXMLValue(pEngine,&(*pText),0);
	if( pData == 0  ){
		/* Out of mem,return immediately */
		return SXRET_OK;
	}
	/* Invoke the user callback */
	PH7_VmCallUserFunctionAp(pEngine->pVm,pCallback,0,&pEngine->sParserValue,pData,0);
	/* Clean-up the mess left behind */
	ph7_context_release_value(pEngine->pCtx,pData);
	return SXRET_OK;
}
/*
 * Processing instruction (PI) handler.
 * The user defined callback must accept two parameters:
 *   handler(resource $parser,string $target,string $data)
 *  $parser
 *    The first parameter, parser, is a reference to the XML parser calling the handler. 
 *  $target
 *   The second parameter, target, contains the PI target. 
 *  $data
 *    The third parameter, data, contains the PI data. 
 *    Note: Instead of a function name, an array containing an object reference
 *    and a method name can also be supplied.
 */
static sxi32 VmXMLPIHandler(SyXMLRawStr *pTargetStr,SyXMLRawStr *pDataStr,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	ph7_value *pCallback,*pTarget,*pData;
	/* Point to the target user defined callback */
	pCallback = &pEngine->aCB[PH7_XML_PI];
	/* Make sure the given callback is callable */
	if( !PH7_VmIsCallable(pEngine->pVm,pCallback,0) ){
		/* Not callable,return immediately*/
		return SXRET_OK;
	}
	/* Get a ph7_value holding the data */
	pTarget = VmXMLValue(pEngine,&(*pTargetStr),0);
	pData = VmXMLValue(pEngine,&(*pDataStr),0);
	if( pTarget == 0 || pData == 0  ){
		/* Out of mem,return immediately */
		return SXRET_OK;
	}
	/* Invoke the user callback */
	PH7_VmCallUserFunctionAp(pEngine->pVm,pCallback,0,&pEngine->sParserValue,pTarget,pData,0);
	/* Clean-up the mess left behind */
	ph7_context_release_value(pEngine->pCtx,pTarget);
	ph7_context_release_value(pEngine->pCtx,pData);
	return SXRET_OK;
}
/*
 * Namespace declaration handler.
 * The user defined callback must accept two parameters:
 *    handler(resource $parser,string $prefix,string $uri)
 * $parser
 *   The first parameter, parser, is a reference to the XML parser calling the handler. 
 * $prefix
 *   The prefix is a string used to reference the namespace within an XML object. 
 * $uri
 *   Uniform Resource Identifier (URI) of namespace. 
 *   Note: Instead of a function name, an array containing an object reference
 *   and a method name can also be supplied.
 */
static sxi32 VmXMLNSStartHandler(SyXMLRawStr *pUriStr,SyXMLRawStr *pPrefixStr,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	ph7_value *pCallback,*pUri,*pPrefix;
	/* Point to the target user defined callback */
	pCallback = &pEngine->aCB[PH7_XML_NS_START];
	/* Make sure the given callback is callable */
	if( !PH7_VmIsCallable(pEngine->pVm,pCallback,0) ){
		/* Not callable,return immediately*/
		return SXRET_OK;
	}
	/* Get a ph7_value holding the PREFIX/URI */
	pUri = VmXMLValue(pEngine,pUriStr,0);
	pPrefix = VmXMLValue(pEngine,pPrefixStr,0);
	if( pUri == 0 || pPrefix == 0  ){
		/* Out of mem,return immediately */
		return SXRET_OK;
	}
	/* Invoke the user callback */
	PH7_VmCallUserFunctionAp(pEngine->pVm,pCallback,0,&pEngine->sParserValue,pUri,pPrefix,0);
	/* Clean-up the mess left behind */
	ph7_context_release_value(pEngine->pCtx,pUri);
	ph7_context_release_value(pEngine->pCtx,pPrefix);
	return SXRET_OK;
}
/*
 * Namespace end declaration handler.
 * The user defined callback must accept two parameters:
 *    handler(resource $parser,string $prefix)
 * $parser
 *   The first parameter, parser, is a reference to the XML parser calling the handler.
 * $prefix
 *  The prefix is a string used to reference the namespace within an XML object.
 *   Note: Instead of a function name, an array containing an object reference
 *   and a method name can also be supplied.
 */
static sxi32 VmXMLNSEndHandler(SyXMLRawStr *pPrefixStr,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	ph7_value *pCallback,*pPrefix;
	/* Point to the target user defined callback */
	pCallback = &pEngine->aCB[PH7_XML_NS_END];
	/* Make sure the given callback is callable */
	if( !PH7_VmIsCallable(pEngine->pVm,pCallback,0) ){
		/* Not callable,return immediately*/
		return SXRET_OK;
	}
	/* Get a ph7_value holding the prefix */
	pPrefix = VmXMLValue(pEngine,pPrefixStr,0);
	if( pPrefix == 0 ){
		/* Out of mem,return immediately */
		return SXRET_OK;
	}
	/* Invoke the user callback */
	PH7_VmCallUserFunctionAp(pEngine->pVm,pCallback,0,&pEngine->sParserValue,pPrefix,0);
	/* Clean-up the mess left behind */
	ph7_context_release_value(pEngine->pCtx,pPrefix);
	return SXRET_OK;
}
/*
 * Error Message consumer handler.
 * Each time the XML parser encounter a syntaxt error or any other error
 * related to XML processing,the following callback is invoked by the 
 * underlying XML parser.
 */
static sxi32 VmXMLErrorHandler(const char *zMessage,sxi32 iErrCode,SyToken *pToken,void *pUserData)
{
	ph7_xml_engine *pEngine = (ph7_xml_engine *)pUserData;
	/* Save the error code */
	pEngine->iErrCode = iErrCode;
	SXUNUSED(zMessage); /* cc warning */
	if( pToken ){
		pEngine->nLine = pToken->nLine;
	}
	/* Abort XML processing immediately */
	return SXERR_ABORT;
}
/*
 * int xml_parse(resource $parser,string $data[,bool $is_final = false ])
 *  Parses an XML document. The handlers for the configured events are called
 *  as many times as necessary.
 * Parameters
 *  $parser
 *   A reference to the XML parser.
 *  $data
 *   Chunk of data to parse. A document may be parsed piece-wise by calling
 *   xml_parse() several times with new data, as long as the is_final parameter
 *   is set and TRUE when the last data is parsed.
 * $is_final
 *   NOT USED. This implementation require that all the processed input be
 *   entirely loaded in memory.
 * Return
 *  Returns 1 on success or 0 on failure.
 */
static int vm_builtin_xml_parse(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	SyXMLParser *pParser;
	const char *zData;
	int nByte;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Ivalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( pEngine->iNest > 0 ){
		/* This can happen when the user callback call xml_parse() again 
		 * in it's body which is forbidden.
		 */
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,
			"Recursive call to %s,PH7 is returning false",
			ph7_function_name(pCtx)
			);
		/* Return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pEngine->pCtx = pCtx;
	/* Point to the underlying XML parser */
	pParser = &pEngine->sParser;
	/* Register elements handler */
	SyXMLParserSetEventHandler(pParser,pEngine,
		VmXMLStartElementHandler,
		VmXMLTextHandler,
		VmXMLErrorHandler,
		0,
		VmXMLEndElementHandler,
		VmXMLPIHandler,
		0,
		0,
		VmXMLNSStartHandler,
		VmXMLNSEndHandler
		);
	pEngine->iErrCode = SXML_ERROR_NONE;
	/* Extract the raw XML input */
	zData = ph7_value_to_string(apArg[1],&nByte);
	/* Start the parse process */
	pEngine->iNest++;
	SyXMLProcess(pParser,zData,(sxu32)nByte);
	pEngine->iNest--;
	/* Return the parse result */
	ph7_result_int(pCtx,pEngine->iErrCode == SXML_ERROR_NONE ? 1 : 0);
	return PH7_OK;
}
/*
 * bool xml_parser_set_option(resource $parser,int $option,mixed $value)
 *  Sets an option in an XML parser.
 * Parameters
 *  $parser
 *   A reference to the XML parser to set an option in.
 *  $option
 *    Which option to set. See below.
 *   The following options are available:
 *   XML_OPTION_CASE_FOLDING 	integer  Controls whether case-folding is enabled for this XML parser.
 *   XML_OPTION_SKIP_TAGSTART 	integer  Specify how many characters should be skipped in the beginning of a tag name.
 *   XML_OPTION_SKIP_WHITE 	    integer  Whether to skip values consisting of whitespace characters.
 *   XML_OPTION_TARGET_ENCODING string 	 Sets which target encoding to use in this XML parser.
 * $value
 *   The option's new value.
 * Return
 *  Returns 1 on success or 0 on failure.
 * Note:
 *  Well,none of these options have meaning under the built-in XML parser so a call to this
 *  function is a no-op.
 */
static int vm_builtin_xml_parser_set_option(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Always return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * mixed xml_parser_get_option(resource $parser,int $option)
 *  Get options from an XML parser.
 * Parameters
 *  $parser
 *   A reference to the XML parser to set an option in.
 * $option
 *   Which option to fetch.
 * Return
 *  This function returns FALSE if parser does not refer to a valid parser
 *  or if option isn't valid.Else the option's value is returned.
 */
static int vm_builtin_xml_parser_get_option(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_xml_engine *pEngine;
	int nOp;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Ivalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the XML engine */
	pEngine = (ph7_xml_engine *)ph7_value_to_resource(apArg[0]);
	if( IS_INVALID_XML_ENGINE(pEngine) ){
		/* Corrupt engine,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the option */
	nOp = ph7_value_to_int(apArg[1]);
	switch(nOp){
	case SXML_OPTION_SKIP_TAGSTART:
	case SXML_OPTION_SKIP_WHITE:
	case SXML_OPTION_CASE_FOLDING:
		ph7_result_int(pCtx,0); break;
	case SXML_OPTION_TARGET_ENCODING:
		ph7_result_string(pCtx,"UTF-8",(int)sizeof("UTF-8")-1);
		break;
	default:
		/* Unknown option,return FALSE*/
		ph7_result_bool(pCtx,0);
		break;
	}
	return PH7_OK;
}
/*
 * string xml_error_string(int $code)
 *  Gets the XML parser error string associated with the given code.
 * Parameters
 *  $code
 *   An error code from xml_get_error_code().
 * Return
 *  Returns a string with a textual description of the error 
 *  code, or FALSE if no description was found.
 */
static int vm_builtin_xml_error_string(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int nErr = -1;
	if( nArg > 0 ){
		nErr = ph7_value_to_int(apArg[0]);
	}
	switch(nErr){
	case SXML_ERROR_DUPLICATE_ATTRIBUTE:
		ph7_result_string(pCtx,"Duplicate attribute",-1/*Compute length automatically*/);
		break;
	case SXML_ERROR_INCORRECT_ENCODING:
		ph7_result_string(pCtx,"Incorrect encoding",-1);
		break;
	case SXML_ERROR_INVALID_TOKEN:
		ph7_result_string(pCtx,"Unexpected token",-1);
		break;
	case SXML_ERROR_MISPLACED_XML_PI:
		ph7_result_string(pCtx,"Misplaced processing instruction",-1);
		break;
	case SXML_ERROR_NO_MEMORY:
		ph7_result_string(pCtx,"Out of memory",-1);
		break;
	case SXML_ERROR_NONE:
		ph7_result_string(pCtx,"Not an error",-1);
		break;
	case SXML_ERROR_TAG_MISMATCH:
		ph7_result_string(pCtx,"Tag mismatch",-1);
		break;
	case -1:
		ph7_result_string(pCtx,"Unknown error code",-1);
		break;
	default:
		ph7_result_string(pCtx,"Syntax error",-1);
		break;
	}
	return PH7_OK;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * int utf8_encode(string $input)
 *  UTF-8 encoding.
 *  This function encodes the string data to UTF-8, and returns the encoded version.
 *  UTF-8 is a standard mechanism used by Unicode for encoding wide character values
 * into a byte stream. UTF-8 is transparent to plain ASCII characters, is self-synchronized
 * (meaning it is possible for a program to figure out where in the bytestream characters start)
 * and can be used with normal string comparison functions for sorting and such.
 *  Notes on UTF-8 (According to SQLite3 authors):
 *  Byte-0    Byte-1    Byte-2    Byte-3    Value
 *  0xxxxxxx                                 00000000 00000000 0xxxxxxx
 *  110yyyyy  10xxxxxx                       00000000 00000yyy yyxxxxxx
 *  1110zzzz  10yyyyyy  10xxxxxx             00000000 zzzzyyyy yyxxxxxx
 *  11110uuu  10uuzzzz  10yyyyyy  10xxxxxx   000uuuuu zzzzyyyy yyxxxxxx
 * Parameters
 * $input
 *   String to encode or NULL on failure.
 * Return
 *  An UTF-8 encoded string.
 */
static int vm_builtin_utf8_encode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nByte,c,e;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = (const unsigned char *)ph7_value_to_string(apArg[0],&nByte);
	if( nByte < 1 ){
		/* Empty string,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	zEnd = &zIn[nByte];
	/* Start the encoding process */
	for(;;){
		if( zIn >= zEnd ){
			/* End of input */
			break;
		}
		c = zIn[0];
		/* Advance the stream cursor */
		zIn++;
		/* Encode */
		if( c<0x00080 ){
			e = (c&0xFF);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
		}else if( c<0x00800 ){
			e = 0xC0 + ((c>>6)&0x1F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
			e = 0x80 + (c & 0x3F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
		}else if( c<0x10000 ){
			e = 0xE0 + ((c>>12)&0x0F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
			e = 0x80 + ((c>>6) & 0x3F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
			e = 0x80 + (c & 0x3F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
		}else{
			e = 0xF0 + ((c>>18) & 0x07);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
			e = 0x80 + ((c>>12) & 0x3F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
			e = 0x80 + ((c>>6) & 0x3F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
			e = 0x80 + (c & 0x3F);
			ph7_result_string(pCtx,(const char *)&e,(int)sizeof(char));
		} 
	}
	/* All done */
	return PH7_OK;
}
/*
 * UTF-8 decoding routine extracted from the sqlite3 source tree.
 * Original author: D. Richard Hipp (http://www.sqlite.org)
 * Status: Public Domain
 */
/*
** This lookup table is used to help decode the first byte of
** a multi-byte UTF8 character.
*/
static const unsigned char UtfTrans1[] = {
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x00, 0x00,
};
/*
** Translate a single UTF-8 character.  Return the unicode value.
**
** During translation, assume that the byte that zTerm points
** is a 0x00.
**
** Write a pointer to the next unread byte back into *pzNext.
**
** Notes On Invalid UTF-8:
**
**  *  This routine never allows a 7-bit character (0x00 through 0x7f) to
**     be encoded as a multi-byte character.  Any multi-byte character that
**     attempts to encode a value between 0x00 and 0x7f is rendered as 0xfffd.
**
**  *  This routine never allows a UTF16 surrogate value to be encoded.
**     If a multi-byte character attempts to encode a value between
**     0xd800 and 0xe000 then it is rendered as 0xfffd.
**
**  *  Bytes in the range of 0x80 through 0xbf which occur as the first
**     byte of a character are interpreted as single-byte characters
**     and rendered as themselves even though they are technically
**     invalid characters.
**
**  *  This routine accepts an infinite number of different UTF8 encodings
**     for unicode values 0x80 and greater.  It do not change over-length
**     encodings to 0xfffd as some systems recommend.
*/
#define READ_UTF8(zIn, zTerm, c)                           \
  c = *(zIn++);                                            \
  if( c>=0xc0 ){                                           \
    c = UtfTrans1[c-0xc0];                                 \
    while( zIn!=zTerm && (*zIn & 0xc0)==0x80 ){            \
      c = (c<<6) + (0x3f & *(zIn++));                      \
    }                                                      \
    if( c<0x80                                             \
        || (c&0xFFFFF800)==0xD800                          \
        || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }        \
  }
PH7_PRIVATE int PH7_Utf8Read(
  const unsigned char *z,         /* First byte of UTF-8 character */
  const unsigned char *zTerm,     /* Pretend this byte is 0x00 */
  const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
){
  int c;
  READ_UTF8(z, zTerm, c);
  *pzNext = z;
  return c;
}
/*
 * string utf8_decode(string $data)
 *  This function decodes data, assumed to be UTF-8 encoded, to unicode.
 * Parameters
 * data
 *  An UTF-8 encoded string.
 * Return
 *  Unicode decoded string or NULL on failure.
 */
static int vm_builtin_utf8_decode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nByte,c;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = (const unsigned char *)ph7_value_to_string(apArg[0],&nByte);
	if( nByte < 1 ){
		/* Empty string,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	zEnd = &zIn[nByte];
	/* Start the decoding process */
	while( zIn < zEnd ){
		c = PH7_Utf8Read(zIn,zEnd,&zIn);
		if( c == 0x0 ){
			break;
		}
		ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
	}
	return PH7_OK;
}
/* Table of built-in VM functions. */
static const ph7_builtin_func aVmFunc[] = {
	{ "func_num_args"  , vm_builtin_func_num_args },
	{ "func_get_arg"   , vm_builtin_func_get_arg  },
	{ "func_get_args"  , vm_builtin_func_get_args },
	{ "func_get_args_byref" , vm_builtin_func_get_args_byref },
	{ "function_exists", vm_builtin_func_exists   },
	{ "is_callable"    , vm_builtin_is_callable   }, 
	{ "get_defined_functions", vm_builtin_get_defined_func },
	{ "register_shutdown_function",vm_builtin_register_shutdown_function },
	{ "call_user_func",        vm_builtin_call_user_func   },
	{ "call_user_func_array",  vm_builtin_call_user_func_array    },
	{ "forward_static_call",   vm_builtin_call_user_func   },
	{ "forward_static_call_array",vm_builtin_call_user_func_array },
	    /* Constants management */
	{ "defined",  vm_builtin_defined              },
	{ "define",   vm_builtin_define               },
	{ "constant", vm_builtin_constant             },
	{ "get_defined_constants", vm_builtin_get_defined_constants },
	   /* Class/Object functions */
	{ "class_alias",     vm_builtin_class_alias       },
	{ "class_exists",    vm_builtin_class_exists      },
	{ "property_exists", vm_builtin_property_exists   },
	{ "method_exists",   vm_builtin_method_exists     },
	{ "interface_exists",vm_builtin_interface_exists  },
	{ "get_class",       vm_builtin_get_class         },
	{ "get_parent_class",vm_builtin_get_parent_class  },
	{ "get_called_class",vm_builtin_get_called_class  },
	{ "get_declared_classes",    vm_builtin_get_declared_classes   },
	{ "get_defined_classes",     vm_builtin_get_declared_classes    },
	{ "get_declared_interfaces", vm_builtin_get_declared_interfaces},
	{ "get_class_methods",       vm_builtin_get_class_methods },
	{ "get_class_vars",          vm_builtin_get_class_vars    },
	{ "get_object_vars",         vm_builtin_get_object_vars   },
	{ "is_subclass_of",          vm_builtin_is_subclass_of    },
	{ "is_a", vm_builtin_is_a },
	   /* Random numbers/strings generators */
	{ "rand",          vm_builtin_rand            },
	{ "mt_rand",       vm_builtin_rand            },
	{ "rand_str",      vm_builtin_rand_str        },
	{ "getrandmax",    vm_builtin_getrandmax      },
	{ "mt_getrandmax", vm_builtin_getrandmax      },
#ifndef PH7_DISABLE_BUILTIN_FUNC
#if !defined(PH7_DISABLE_HASH_FUNC)
	{ "uniqid",        vm_builtin_uniqid          },
#endif /* PH7_DISABLE_HASH_FUNC */
#endif /* PH7_DISABLE_BUILTIN_FUNC */
	   /* Language constructs functions */
	{ "echo",  vm_builtin_echo                    },
	{ "print", vm_builtin_print                   },
	{ "exit",  vm_builtin_exit                    },
	{ "die",   vm_builtin_exit                    },
	{ "eval",  vm_builtin_eval                    },
	  /* Variable handling functions */
	{ "get_defined_vars",vm_builtin_get_defined_vars},
	{ "gettype",   vm_builtin_gettype              },
	{ "get_resource_type", vm_builtin_get_resource_type},
	{ "isset",     vm_builtin_isset                },
	{ "unset",     vm_builtin_unset                },
	{ "var_dump",  vm_builtin_var_dump             },
	{ "print_r",   vm_builtin_print_r              },
	{ "var_export",vm_builtin_var_export           },
	  /* Ouput control functions */
	{ "flush",        vm_builtin_ob_flush          },
	{ "ob_clean",     vm_builtin_ob_clean          },
	{ "ob_end_clean", vm_builtin_ob_end_clean      },
	{ "ob_end_flush", vm_builtin_ob_end_flush      },
	{ "ob_flush",     vm_builtin_ob_flush          },
	{ "ob_get_clean", vm_builtin_ob_get_clean      },
	{ "ob_get_contents", vm_builtin_ob_get_contents},
	{ "ob_get_flush",    vm_builtin_ob_get_clean   },
	{ "ob_get_length",   vm_builtin_ob_get_length  },
	{ "ob_get_level",    vm_builtin_ob_get_level   },
	{ "ob_implicit_flush", vm_builtin_ob_implicit_flush},
	{ "ob_get_level",      vm_builtin_ob_get_level },
	{ "ob_list_handlers",  vm_builtin_ob_list_handlers },
	{ "ob_start",          vm_builtin_ob_start     },
	  /* Assertion functions */
	{ "assert_options",  vm_builtin_assert_options },
	{ "assert",          vm_builtin_assert         },
	  /* Error reporting functions */
	{ "trigger_error",vm_builtin_trigger_error     },
	{ "user_error",   vm_builtin_trigger_error     },
	{ "error_reporting",vm_builtin_error_reporting },
	{ "error_log",       vm_builtin_error_log      },
	{ "restore_exception_handler", vm_builtin_restore_exception_handler },
	{ "set_exception_handler",     vm_builtin_set_exception_handler     },
	{ "restore_error_handler", vm_builtin_restore_error_handler },
	{ "set_error_handler",vm_builtin_set_error_handler },
	{ "debug_backtrace",  vm_builtin_debug_backtrace},
	{ "error_get_last" ,  vm_builtin_debug_backtrace },
	{ "debug_print_backtrace", vm_builtin_debug_print_backtrace  },
	{ "debug_string_backtrace",vm_builtin_debug_string_backtrace },
	  /* Release info */
	{"ph7version",       vm_builtin_ph7_version  },
	{"ph7credits",       vm_builtin_ph7_credits  },
	{"ph7info",          vm_builtin_ph7_credits  },
	{"ph7_info",         vm_builtin_ph7_credits  },
	{"phpinfo",          vm_builtin_ph7_credits  },
	{"ph7copyright",     vm_builtin_ph7_credits  },
	  /* hashmap */
	{"compact",          vm_builtin_compact       },
	{"extract",          vm_builtin_extract       },
	{"import_request_variables", vm_builtin_import_request_variables},
	  /* URL related function */
	{"parse_url",        vm_builtin_parse_url     },
	 /* Refer to 'builtin.c' for others string processing functions. */
#ifndef PH7_DISABLE_BUILTIN_FUNC
	   /* XML processing functions */
	{"xml_parser_create",        vm_builtin_xml_parser_create   },
	{"xml_parser_create_ns",     vm_builtin_xml_parser_create_ns},
	{"xml_parser_free",          vm_builtin_xml_parser_free     },
	{"xml_set_element_handler",  vm_builtin_xml_set_element_handler},
	{"xml_set_character_data_handler", vm_builtin_xml_set_character_data_handler},
	{"xml_set_default_handler",  vm_builtin_xml_set_default_handler },
	{"xml_set_end_namespace_decl_handler", vm_builtin_xml_set_end_namespace_decl_handler},
	{"xml_set_start_namespace_decl_handler",vm_builtin_xml_set_start_namespace_decl_handler},
	{"xml_set_processing_instruction_handler",vm_builtin_xml_set_processing_instruction_handler},
	{"xml_set_unparsed_entity_decl_handler",vm_builtin_xml_set_unparsed_entity_decl_handler},
	{"xml_set_notation_decl_handler",vm_builtin_xml_set_notation_decl_handler},
	{"xml_set_external_entity_ref_handler",vm_builtin_xml_set_external_entity_ref_handler},
	{"xml_get_current_line_number",  vm_builtin_xml_get_current_line_number},
	{"xml_get_current_byte_index",   vm_builtin_xml_get_current_byte_index },
	{"xml_set_object",               vm_builtin_xml_set_object},
	{"xml_get_current_column_number",vm_builtin_xml_get_current_column_number},
	{"xml_get_error_code",           vm_builtin_xml_get_error_code },
	{"xml_parse",                    vm_builtin_xml_parse },
	{"xml_parser_set_option",        vm_builtin_xml_parser_set_option},
	{"xml_parser_get_option",        vm_builtin_xml_parser_get_option},
	{"xml_error_string",             vm_builtin_xml_error_string     },
#endif /* PH7_DISABLE_BUILTIN_FUNC */
	   /* UTF-8 encoding/decoding */
	{"utf8_encode",    vm_builtin_utf8_encode},
	{"utf8_decode",    vm_builtin_utf8_decode},
	   /* Command line processing */
	{"getopt",         vm_builtin_getopt     },
	   /* JSON encoding/decoding */
	{"json_encode",    vm_builtin_json_encode },
	{"json_last_error",vm_builtin_json_last_error},
	{"json_decode",    vm_builtin_json_decode },
	{"serialize",      vm_builtin_json_encode },
	{"unserialize",    vm_builtin_json_decode },
	   /* Files/URI inclusion facility */
	{ "get_include_path",  vm_builtin_get_include_path },
	{ "get_included_files",vm_builtin_get_included_files}, 
	{ "include",      vm_builtin_include          },
	{ "include_once", vm_builtin_include_once     },
	{ "require",      vm_builtin_require          },
	{ "require_once", vm_builtin_require_once     },
};
/*
 * Register the built-in VM functions defined above.
 */
static sxi32 VmRegisterSpecialFunction(ph7_vm *pVm)
{
	sxi32 rc;
	sxu32 n;
	for( n = 0 ; n < SX_ARRAYSIZE(aVmFunc) ; ++n ){
		/* Note that these special functions have access
		 * to the underlying virtual machine as their
		 * private data.
		 */
		rc = ph7_create_function(&(*pVm),aVmFunc[n].zName,aVmFunc[n].xFunc,&(*pVm));
		if( rc != SXRET_OK ){
			return rc;
		}
	}
	return SXRET_OK;
}
/*
 * Check if the given name refer to an installed class.
 * Return a pointer to that class on success. NULL on failure.
 */
PH7_PRIVATE ph7_class * PH7_VmExtractClass(
	ph7_vm *pVm,        /* Target VM */
	const char *zName,  /* Name of the target class */
	sxu32 nByte,        /* zName length */
	sxi32 iLoadable,    /* TRUE to return only loadable class
						 * [i.e: no abstract classes or interfaces]
						 */
	sxi32 iNest         /* Nesting level (Not used) */
	)
{
	SyHashEntry *pEntry;
	ph7_class *pClass;
	/* Perform a hash lookup */
	pEntry = SyHashGet(&pVm->hClass,(const void *)zName,nByte);
	
	if( pEntry == 0 ){
		/* No such entry,return NULL */
		iNest = 0; /* cc warning */
		return 0;
	}
	pClass = (ph7_class *)pEntry->pUserData;
	if( !iLoadable ){
		/* Return the first class seen */
		return pClass;
	}else{
		/* Check the collision list */
		while(pClass){
			if( (pClass->iFlags & (PH7_CLASS_INTERFACE|PH7_CLASS_ABSTRACT)) == 0 ){
				/* Class is loadable */
				return pClass;
			}
			/* Point to the next entry */
			pClass = pClass->pNextName;
		}
	}
	/* No such loadable class */
	return 0;
}
/*
 * Reference Table Implementation 
 * Status: stable <chm@symisc.net>
 * Intro
 *  The implementation of the reference mechanism in the PH7 engine
 *  differ greatly from the one used by the zend engine. That is,
 *  the reference implementation is consistent,solid and it's
 *  behavior resemble the C++ reference mechanism.
 *  Refer to the official for more information on this powerful
 *  extension.
 */
/*
 * Allocate a new reference entry.
 */
static VmRefObj * VmNewRefObj(ph7_vm *pVm,sxu32 nIdx)
{
	VmRefObj *pRef;
	/* Allocate a new instance */
	pRef = (VmRefObj *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(VmRefObj));
	if( pRef == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pRef,sizeof(VmRefObj));
	/* Initialize fields */
	SySetInit(&pRef->aReference,&pVm->sAllocator,sizeof(SyHashEntry *));
	SySetInit(&pRef->aArrEntries,&pVm->sAllocator,sizeof(ph7_hashmap_node *));
	pRef->nIdx = nIdx;
	return pRef;
}
/*
 * Default hash function used by the reference table 
 * for lookup/insertion operations.
 */
static sxu32 VmRefHash(sxu32 nIdx)
{
	/* Calculate the hash based on the memory object index */
	return nIdx ^ (nIdx << 8) ^ (nIdx >> 8);
}
/*
 * Check if a memory object [i.e: a variable] is already installed
 * in the reference table.
 * Return a pointer to the entry (VmRefObj instance) on success.NULL
 * otherwise.
 * The implementation of the reference mechanism in the PH7 engine
 * differ greatly from the one used by the zend engine. That is,
 * the reference implementation is consistent,solid and it's
 * behavior resemble the C++ reference mechanism.
 * Refer to the official for more information on this powerful
 * extension.
 */
static VmRefObj * VmRefObjExtract(ph7_vm *pVm,sxu32 nObjIdx)
{
	VmRefObj *pRef;
	sxu32 nBucket;
	/* Point to the appropriate bucket */
	nBucket = VmRefHash(nObjIdx) & (pVm->nRefSize - 1);
	/* Perform the lookup */
	pRef = pVm->apRefObj[nBucket];
	for(;;){
		if( pRef == 0 ){
			break;
		}
		if( pRef->nIdx == nObjIdx ){
			/* Entry found */
			return pRef;
		}
		/* Point to the next entry */
		pRef = pRef->pNextCollide;
	}
	/* No such entry,return NULL */
	return 0;
}
/*
 * Install a memory object [i.e: a variable] in the reference table.
 *
 * The implementation of the reference mechanism in the PH7 engine
 * differ greatly from the one used by the zend engine. That is,
 * the reference implementation is consistent,solid and it's
 * behavior resemble the C++ reference mechanism.
 * Refer to the official for more information on this powerful
 * extension.
 */
static sxi32 VmRefObjInsert(ph7_vm *pVm,VmRefObj *pRef)
{
	sxu32 nBucket;
	if( pVm->nRefUsed * 3 >= pVm->nRefSize ){
		VmRefObj **apNew;
		sxu32 nNew;
		/* Allocate a larger table */
		nNew = pVm->nRefSize << 1;
		apNew = (VmRefObj **)SyMemBackendAlloc(&pVm->sAllocator,sizeof(VmRefObj *) * nNew);
		if( apNew ){
			VmRefObj *pEntry = pVm->pRefList;
			sxu32 n;
			/* Zero the structure */
			SyZero((void *)apNew,nNew * sizeof(VmRefObj *));
			/* Rehash all referenced entries */
			for( n = 0 ; n < pVm->nRefUsed ; ++n ){
				/* Remove old collision links */
				pEntry->pNextCollide = pEntry->pPrevCollide = 0;
				/* Point to the appropriate bucket */
				nBucket = VmRefHash(pEntry->nIdx) & (nNew - 1);
				/* Insert the entry  */
				pEntry->pNextCollide = apNew[nBucket];
				if( apNew[nBucket] ){
					apNew[nBucket]->pPrevCollide = pEntry;
				}
				apNew[nBucket] = pEntry;
				/* Point to the next entry */
				pEntry = pEntry->pNext;
			}
			/* Release the old table */
			SyMemBackendFree(&pVm->sAllocator,pVm->apRefObj);
			/* Install the new one */
			pVm->apRefObj = apNew;
			pVm->nRefSize = nNew;
		}
	}
	/* Point to the appropriate bucket */
	nBucket = VmRefHash(pRef->nIdx) & (pVm->nRefSize - 1);
	/* Insert the entry */
	pRef->pNextCollide = pVm->apRefObj[nBucket];
	if( pVm->apRefObj[nBucket] ){
		pVm->apRefObj[nBucket]->pPrevCollide = pRef;
	}
	pVm->apRefObj[nBucket] = pRef;
	MACRO_LD_PUSH(pVm->pRefList,pRef);
	pVm->nRefUsed++;
	return SXRET_OK;
}
/*
 * Destroy a memory object [i.e: a variable] and remove it from
 * the reference table.
 * This function is invoked when the user perform an unset
 * call [i.e: unset($var); ].
 * The implementation of the reference mechanism in the PH7 engine
 * differ greatly from the one used by the zend engine. That is,
 * the reference implementation is consistent,solid and it's
 * behavior resemble the C++ reference mechanism.
 * Refer to the official for more information on this powerful
 * extension.
 */
static sxi32 VmRefObjUnlink(ph7_vm *pVm,VmRefObj *pRef)
{
	ph7_hashmap_node **apNode;
	SyHashEntry **apEntry;
	sxu32 n;
	/* Point to the reference table */
	apNode = (ph7_hashmap_node **)SySetBasePtr(&pRef->aArrEntries);
	apEntry = (SyHashEntry **)SySetBasePtr(&pRef->aReference);
	/* Unlink the entry from the reference table */
	for( n = 0 ; n < SySetUsed(&pRef->aReference) ; n++ ){
		if( apEntry[n] ){
			SyHashDeleteEntry2(apEntry[n]);
		}
	}
	for(n = 0 ; n < SySetUsed(&pRef->aArrEntries) ; ++n ){
		if( apNode[n] ){
			PH7_HashmapUnlinkNode(apNode[n],FALSE);
		}
	}
	if( pRef->pPrevCollide ){
		pRef->pPrevCollide->pNextCollide = pRef->pNextCollide;
	}else{
		pVm->apRefObj[VmRefHash(pRef->nIdx) & (pVm->nRefSize - 1)] = pRef->pNextCollide;
	}
	if( pRef->pNextCollide ){
		pRef->pNextCollide->pPrevCollide = pRef->pPrevCollide;
	}
	MACRO_LD_REMOVE(pVm->pRefList,pRef);
	/* Release the node */
	SySetRelease(&pRef->aReference);
	SySetRelease(&pRef->aArrEntries);
	SyMemBackendPoolFree(&pVm->sAllocator,pRef);
	pVm->nRefUsed--;
	return SXRET_OK;
}
/*
 * Install a memory object [i.e: a variable] in the reference table.
 * The implementation of the reference mechanism in the PH7 engine
 * differ greatly from the one used by the zend engine. That is,
 * the reference implementation is consistent,solid and it's
 * behavior resemble the C++ reference mechanism.
 * Refer to the official for more information on this powerful
 * extension.
 */
PH7_PRIVATE sxi32 PH7_VmRefObjInstall(
	ph7_vm *pVm,                 /* Target VM */
	sxu32 nIdx,                  /* Memory object index in the global object pool */
	SyHashEntry *pEntry,         /* Hash entry of this object */
	ph7_hashmap_node *pMapEntry, /* != NULL if the memory object is an array entry */
	sxi32 iFlags                 /* Control flags */ 
	)
{
	VmFrame *pFrame = pVm->pFrame;
	VmRefObj *pRef;
	/* Check if the referenced object already exists */
	pRef = VmRefObjExtract(&(*pVm),nIdx);
	if( pRef == 0 ){
		/* Create a new entry */
		pRef = VmNewRefObj(&(*pVm),nIdx);
		if( pRef == 0 ){
			return SXERR_MEM;
		}
		pRef->iFlags = iFlags;
		/* Install the entry */
		VmRefObjInsert(&(*pVm),pRef);
	}
	while( pFrame->pParent && (pFrame->iFlags & VM_FRAME_EXCEPTION) ){
		/* Safely ignore the exception frame */
		pFrame = pFrame->pParent;
	}
	if( pFrame->pParent != 0 && pEntry ){
		VmSlot sRef;
		/* Local frame,record referenced entry so that it can
		 * be deleted when we leave this frame.
		 */
		sRef.nIdx = nIdx;
		sRef.pUserData = pEntry;
		if( SXRET_OK != SySetPut(&pFrame->sRef,(const void *)&sRef)) {
			pEntry = 0; /* Do not record this entry */
		}
	}
	if( pEntry ){
		/* Address of the hash-entry */
		SySetPut(&pRef->aReference,(const void *)&pEntry);
	}
	if( pMapEntry ){
		/* Address of the hashmap node [i.e: Array entry] */
		SySetPut(&pRef->aArrEntries,(const void *)&pMapEntry);
	}
	return SXRET_OK;
}
/*
 * Remove a memory object [i.e: a variable] from the reference table.
 * The implementation of the reference mechanism in the PH7 engine
 * differ greatly from the one used by the zend engine. That is,
 * the reference implementation is consistent,solid and it's
 * behavior resemble the C++ reference mechanism.
 * Refer to the official for more information on this powerful
 * extension.
 */
PH7_PRIVATE sxi32 PH7_VmRefObjRemove(
	ph7_vm *pVm,                 /* Target VM */
	sxu32 nIdx,                  /* Memory object index in the global object pool */
	SyHashEntry *pEntry,         /* Hash entry of this object */
	ph7_hashmap_node *pMapEntry  /* != NULL if the memory object is an array entry */
	)
{
	VmRefObj *pRef;
	sxu32 n;
	/* Check if the referenced object already exists */
	pRef = VmRefObjExtract(&(*pVm),nIdx);
	if( pRef == 0 ){
		/* Not such entry */
		return SXERR_NOTFOUND;
	}
	/* Remove the desired entry */
	if( pEntry ){
		SyHashEntry **apEntry;
		apEntry = (SyHashEntry **)SySetBasePtr(&pRef->aReference);
		for( n = 0 ; n < SySetUsed(&pRef->aReference) ; n++ ){
			if( apEntry[n] == pEntry ){
				/* Nullify the entry */
				apEntry[n] = 0;
				/*
				 * NOTE:
				 * In future releases,think to add a free pool of entries,so that
				 * we avoid wasting spaces. 
				 */
			}
		}
	}
	if( pMapEntry ){
		ph7_hashmap_node **apNode;
		apNode = (ph7_hashmap_node **)SySetBasePtr(&pRef->aArrEntries);
		for(n = 0 ; n < SySetUsed(&pRef->aArrEntries) ; n++ ){
			if( apNode[n] == pMapEntry ){
				/* nullify the entry */
				apNode[n] = 0;
			}
		}
	}
	return SXRET_OK;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
/*
 * Extract the IO stream device associated with a given scheme.
 * Return a pointer to an instance of ph7_io_stream when the scheme
 * have an associated IO stream registered with it. NULL otherwise.
 * If no scheme:// is avalilable then the file:// scheme is assumed.
 * For more information on how to register IO stream devices,please
 * refer to the official documentation.
 */
PH7_PRIVATE const ph7_io_stream * PH7_VmGetStreamDevice(
	ph7_vm *pVm,           /* Target VM */
	const char **pzDevice, /* Full path,URI,... */
	int nByte              /* *pzDevice length*/
	)
{
	const char *zIn,*zEnd,*zCur,*zNext;
	ph7_io_stream **apStream,*pStream;
	SyString sDev,sCur;
	sxu32 n,nEntry;
	int rc;
	/* Check if a scheme [i.e: file://,http://,zip://...] is available */
	zNext = zCur = zIn = *pzDevice;
	zEnd = &zIn[nByte];
	while( zIn < zEnd ){
		if( zIn < &zEnd[-3]/*://*/ && zIn[0] == ':' && zIn[1] == '/' && zIn[2] == '/' ){
			/* Got one */
			zNext = &zIn[sizeof("://")-1];
			break;
		}
		/* Advance the cursor */
		zIn++;
	}
	if( zIn >= zEnd ){
		/* No such scheme,return the default stream */
		return pVm->pDefStream;
	}
	SyStringInitFromBuf(&sDev,zCur,zIn-zCur);
	/* Remove leading and trailing white spaces */
	SyStringFullTrim(&sDev);
	/* Perform a linear lookup on the installed stream devices */
	apStream = (ph7_io_stream **)SySetBasePtr(&pVm->aIOstream);
	nEntry = SySetUsed(&pVm->aIOstream);
	for( n = 0 ; n < nEntry ; n++ ){
		pStream = apStream[n];
		SyStringInitFromBuf(&sCur,pStream->zName,SyStrlen(pStream->zName));
		/* Perfrom a case-insensitive comparison */
		rc = SyStringCmp(&sDev,&sCur,SyStrnicmp);
		if( rc == 0 ){
			/* Stream device found */
			*pzDevice = zNext;
			return pStream;
		}
	}
	/* No such stream,return NULL */
	return 0;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * Section:
 *    HTTP/URI related routines.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */ 
 /*
  * URI Parser: Split an URI into components [i.e: Host,Path,Query,...].
  * URI syntax: [method:/][/[user[:pwd]@]host[:port]/][document]
  * This almost, but not quite, RFC1738 URI syntax.
  * This routine is not a validator,it does not check for validity
  * nor decode URI parts,the only thing this routine does is splitting
  * the input to its fields.
  * Upper layer are responsible of decoding and validating URI parts.
  * On success,this function populate the "SyhttpUri" structure passed
  * as the first argument. Otherwise SXERR_* is returned when a malformed
  * input is encountered.
  */
 static sxi32 VmHttpSplitURI(SyhttpUri *pOut,const char *zUri,sxu32 nLen)
 {
	 const char *zEnd = &zUri[nLen];
	 sxu8 bHostOnly = FALSE;
	 sxu8 bIPv6 = FALSE	; 
	 const char *zCur;
	 SyString *pComp;
	 sxu32 nPos = 0;
	 sxi32 rc;
	 /* Zero the structure first */
	 SyZero(pOut,sizeof(SyhttpUri));
	 /* Remove leading and trailing white spaces  */
	 SyStringInitFromBuf(&pOut->sRaw,zUri,nLen);
	 SyStringFullTrim(&pOut->sRaw);
	 /* Find the first '/' separator */
	 rc = SyByteFind(zUri,(sxu32)(zEnd - zUri),'/',&nPos);
	 if( rc != SXRET_OK ){
		 /* Assume a host name only */
		 zCur = zEnd;
		 bHostOnly = TRUE;
		 goto ProcessHost;
	 }
	 zCur = &zUri[nPos];
	 if( zUri != zCur && zCur[-1] == ':' ){
		 /* Extract a scheme:
		  * Not that we can get an invalid scheme here.
		  * Fortunately the caller can discard any URI by comparing this scheme with its 
		  * registered schemes and will report the error as soon as his comparison function
		  * fail.
		  */
	 	pComp = &pOut->sScheme;
		SyStringInitFromBuf(pComp,zUri,(sxu32)(zCur - zUri - 1));
		SyStringLeftTrim(pComp);		
	 }
	 if( zCur[1] != '/' ){
		 if( zCur == zUri || zCur[-1] == ':' ){
		  /* No authority */
		  goto PathSplit;
		}
		 /* There is something here , we will assume its an authority
		  * and someone has forgot the two prefix slashes "//",
		  * sooner or later we will detect if we are dealing with a malicious
		  * user or not,but now assume we are dealing with an authority
		  * and let the caller handle all the validation process.
		  */
		 goto ProcessHost;
	 }	 
	 zUri = &zCur[2];
	 zCur = zEnd;
	 rc = SyByteFind(zUri,(sxu32)(zEnd - zUri),'/',&nPos);
	 if( rc == SXRET_OK ){
		 zCur = &zUri[nPos];
	 }
 ProcessHost:
	 /* Extract user information if present */
	 rc = SyByteFind(zUri,(sxu32)(zCur - zUri),'@',&nPos);
	 if( rc == SXRET_OK ){
		 if( nPos > 0 ){
			 sxu32 nPassOfft; /* Password offset */
			 pComp = &pOut->sUser;
			 SyStringInitFromBuf(pComp,zUri,nPos);
			 /* Extract the password if available */
			 rc = SyByteFind(zUri,(sxu32)(zCur - zUri),':',&nPassOfft);
			 if( rc == SXRET_OK && nPassOfft < nPos){
				 pComp->nByte = nPassOfft;
				 pComp = &pOut->sPass;
				 pComp->zString = &zUri[nPassOfft+sizeof(char)];
				 pComp->nByte = nPos - nPassOfft - 1;
			 }
			 /* Update the cursor */
			 zUri = &zUri[nPos+1];
		 }else{
			 zUri++;
		 }
	 }
	 pComp = &pOut->sHost;
	 while( zUri < zCur && SyisSpace(zUri[0])){
		 zUri++;
	 }	
	 SyStringInitFromBuf(pComp,zUri,(sxu32)(zCur - zUri));
	 if( pComp->zString[0] == '[' ){
		 /* An IPv6 Address: Make a simple naive test
		  */
		 zUri++; pComp->zString++; pComp->nByte = 0;
		 while( ((unsigned char)zUri[0] < 0xc0 && SyisHex(zUri[0])) || zUri[0] == ':' ){
			 zUri++; pComp->nByte++;
		 }
		 if( zUri[0] != ']' ){
			 return SXERR_CORRUPT; /* Malformed IPv6 address */
		 }
		 zUri++;
		 bIPv6 = TRUE;
	 }
	 /* Extract a port number if available */
	 rc = SyByteFind(zUri,(sxu32)(zCur - zUri),':',&nPos);
	 if( rc == SXRET_OK ){
		 if( bIPv6 == FALSE ){
			 pComp->nByte = (sxu32)(&zUri[nPos] - zUri);
		 }
		 pComp = &pOut->sPort;
		 SyStringInitFromBuf(pComp,&zUri[nPos+1],(sxu32)(zCur - &zUri[nPos+1]));	
	 }
	 if( bHostOnly == TRUE ){
		 return SXRET_OK;
	 }
PathSplit:
	 zUri = zCur;
	 pComp = &pOut->sPath;
	 SyStringInitFromBuf(pComp,zUri,(sxu32)(zEnd-zUri));
	 if( pComp->nByte == 0 ){
		 return SXRET_OK; /* Empty path */
	 }
	 if( SXRET_OK == SyByteFind(zUri,(sxu32)(zEnd-zUri),'?',&nPos) ){
		 pComp->nByte = nPos; /* Update path length */
		 pComp = &pOut->sQuery;
		 SyStringInitFromBuf(pComp,&zUri[nPos+1],(sxu32)(zEnd-&zUri[nPos+1]));
	 }
	 if( SXRET_OK == SyByteFind(zUri,(sxu32)(zEnd-zUri),'#',&nPos) ){
		 /* Update path or query length */
		 if( pComp == &pOut->sPath ){
			 pComp->nByte = nPos;
		 }else{
			 if( &zUri[nPos] < (char *)SyStringData(pComp) ){
				 /* Malformed syntax : Query must be present before fragment */
				 return SXERR_SYNTAX;
			 }
			 pComp->nByte -= (sxu32)(zEnd - &zUri[nPos]);
		 }
		 pComp = &pOut->sFragment;
		 SyStringInitFromBuf(pComp,&zUri[nPos+1],(sxu32)(zEnd-&zUri[nPos+1]))
	 }
	 return SXRET_OK;
 }
 /*
 * Extract a single line from a raw HTTP request.
 * Return SXRET_OK on success,SXERR_EOF when end of input
 * and SXERR_MORE when more input is needed.
 */
static sxi32 VmGetNextLine(SyString *pCursor,SyString *pCurrent)
{ 
  	const char *zIn;
  	sxu32 nPos; 
	/* Jump leading white spaces */
	SyStringLeftTrim(pCursor);
	if( pCursor->nByte < 1 ){
		SyStringInitFromBuf(pCurrent,0,0);
		return SXERR_EOF; /* End of input */
	}
	zIn = SyStringData(pCursor);
	if( SXRET_OK != SyByteListFind(pCursor->zString,pCursor->nByte,"\r\n",&nPos) ){
		/* Line not found,tell the caller to read more input from source */
		SyStringDupPtr(pCurrent,pCursor);
		return SXERR_MORE;
	}
  	pCurrent->zString = zIn;
  	pCurrent->nByte	= nPos;	
  	/* advance the cursor so we can call this routine again */
  	pCursor->zString = &zIn[nPos];
  	pCursor->nByte -= nPos;
  	return SXRET_OK;
 }
 /*
  * Split a single MIME header into a name value pair. 
  * This function return SXRET_OK,SXERR_CONTINUE on success.
  * Otherwise SXERR_NEXT is returned when a malformed header
  * is encountered.
  * Note: This function handle also mult-line headers.
  */
 static sxi32 VmHttpProcessOneHeader(SyhttpHeader *pHdr,SyhttpHeader *pLast,const char *zLine,sxu32 nLen)
 {
	 SyString *pName;
	 sxu32 nPos;
	 sxi32 rc;
	 if( nLen < 1 ){
		 return SXERR_NEXT;
	 }
	 /* Check for multi-line header */
	if( pLast && (zLine[-1] == ' ' || zLine[-1] == '\t') ){
		SyString *pTmp = &pLast->sValue;
		SyStringFullTrim(pTmp);
		if( pTmp->nByte == 0 ){
			SyStringInitFromBuf(pTmp,zLine,nLen);
		}else{
			/* Update header value length */
			pTmp->nByte = (sxu32)(&zLine[nLen] - pTmp->zString);
		}
		 /* Simply tell the caller to reset its states and get another line */
		 return SXERR_CONTINUE;
	 }
	/* Split the header */
	pName = &pHdr->sName;
	rc = SyByteFind(zLine,nLen,':',&nPos);
	if(rc != SXRET_OK ){
		return SXERR_NEXT; /* Malformed header;Check the next entry */
	}
	SyStringInitFromBuf(pName,zLine,nPos);
	SyStringFullTrim(pName);
	/* Extract a header value */
	SyStringInitFromBuf(&pHdr->sValue,&zLine[nPos + 1],nLen - nPos - 1);
	/* Remove leading and trailing whitespaces */
	SyStringFullTrim(&pHdr->sValue);
	return SXRET_OK;
 }
 /*
  * Extract all MIME headers associated with a HTTP request.
  * After processing the first line of a HTTP request,the following
  * routine is called in order to extract MIME headers.
  * This function return SXRET_OK on success,SXERR_MORE when it needs
  * more inputs.
  * Note: Any malformed header is simply discarded.
  */
 static sxi32 VmHttpExtractHeaders(SyString *pRequest,SySet *pOut)
 {
	 SyhttpHeader *pLast = 0;
	 SyString sCurrent;
	 SyhttpHeader sHdr;
	 sxu8 bEol;
	 sxi32 rc;
	 if( SySetUsed(pOut) > 0 ){
		 pLast = (SyhttpHeader *)SySetAt(pOut,SySetUsed(pOut)-1);
	 }
	 bEol = FALSE;
	 for(;;){
		 SyZero(&sHdr,sizeof(SyhttpHeader));
		 /* Extract a single line from the raw HTTP request */
		 rc = VmGetNextLine(pRequest,&sCurrent);
		 if(rc != SXRET_OK ){
			 if( sCurrent.nByte < 1 ){
				 break;
			 }
			 bEol = TRUE;
		 }
		 /* Process the header */
		 if( SXRET_OK == VmHttpProcessOneHeader(&sHdr,pLast,sCurrent.zString,sCurrent.nByte)){
			 if( SXRET_OK != SySetPut(pOut,(const void *)&sHdr) ){
				 break;
			 }
			 /* Retrieve the last parsed header so we can handle multi-line header
			  * in case we face one of them.
			  */
			 pLast = (SyhttpHeader *)SySetPeek(pOut);
		 }
		 if( bEol ){
			 break;
		 }
	 } /* for(;;) */
	 return SXRET_OK;
 }
 /*
  * Process the first line of a HTTP request.
  * This routine perform the following operations
  *  1) Extract the HTTP method.
  *  2) Split the request URI to it's fields [ie: host,path,query,...].
  *  3) Extract the HTTP protocol version.
  */
 static sxi32 VmHttpProcessFirstLine(
	 SyString *pRequest, /* Raw HTTP request */
	 sxi32 *pMethod,     /* OUT: HTTP method */
	 SyhttpUri *pUri,    /* OUT: Parse of the URI */
	 sxi32 *pProto       /* OUT: HTTP protocol */
	 )
 {
	 static const char *azMethods[] = { "get","post","head","put"};
	 static const sxi32 aMethods[]  = { HTTP_METHOD_GET,HTTP_METHOD_POST,HTTP_METHOD_HEAD,HTTP_METHOD_PUT};
	 const char *zIn,*zEnd,*zPtr;
	 SyString sLine;
	 sxu32 nLen;
	 sxi32 rc;
	 /* Extract the first line and update the pointer */
	 rc = VmGetNextLine(pRequest,&sLine);
	 if( rc != SXRET_OK ){
		 return rc;
	 }
	 if ( sLine.nByte < 1 ){
		 /* Empty HTTP request */
		 return SXERR_EMPTY;
	 }
	 /* Delimit the line and ignore trailing and leading white spaces */
	 zIn = sLine.zString;
	 zEnd = &zIn[sLine.nByte];
	 while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		 zIn++;
	 }
	 /* Extract the HTTP method */
	 zPtr = zIn;
	 while( zIn < zEnd && !SyisSpace(zIn[0]) ){
		 zIn++;
	 }
	 *pMethod = HTTP_METHOD_OTHR;
	 if( zIn > zPtr ){
		 sxu32 i;
		 nLen = (sxu32)(zIn-zPtr);
		 for( i = 0 ; i < SX_ARRAYSIZE(azMethods) ; ++i ){
			 if( SyStrnicmp(azMethods[i],zPtr,nLen) == 0 ){
				 *pMethod = aMethods[i];
				 break;
			 }
		 }
	 }
	 /* Jump trailing white spaces */
	 while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		 zIn++;
	 }
	  /* Extract the request URI */
	 zPtr = zIn;
	 while( zIn < zEnd && !SyisSpace(zIn[0]) ){
		 zIn++;
	 } 
	 if( zIn > zPtr ){
		 nLen = (sxu32)(zIn-zPtr);
		 /* Split raw URI to it's fields */
		 VmHttpSplitURI(pUri,zPtr,nLen);
	 }
	 /* Jump trailing white spaces */
	 while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		 zIn++;
	 }
	 /* Extract the HTTP version */
	 zPtr = zIn;
	 while( zIn < zEnd && !SyisSpace(zIn[0]) ){
		 zIn++;
	 }
	 *pProto = HTTP_PROTO_11; /* HTTP/1.1 */
	 rc = 1;
	 if( zIn > zPtr ){
		 rc = SyStrnicmp(zPtr,"http/1.0",(sxu32)(zIn-zPtr));
	 }
	 if( !rc ){
		 *pProto = HTTP_PROTO_10; /* HTTP/1.0 */
	 }
	 return SXRET_OK;
 }
 /*
  * Tokenize,decode and split a raw query encoded as: "x-www-form-urlencoded" 
  * into a name value pair.
  * Note that this encoding is implicit in GET based requests.
  * After the tokenization process,register the decoded queries
  * in the $_GET/$_POST/$_REQUEST superglobals arrays.
  */
 static sxi32 VmHttpSplitEncodedQuery(
	 ph7_vm *pVm,       /* Target VM */
	 SyString *pQuery,  /* Raw query to decode */
	 SyBlob *pWorker,   /* Working buffer */
	 int is_post        /* TRUE if we are dealing with a POST request */
	 )
 {
	 const char *zEnd = &pQuery->zString[pQuery->nByte];
	 const char *zIn = pQuery->zString;
	 ph7_value *pGet,*pRequest;
	 SyString sName,sValue;
	 const char *zPtr;
	 sxu32 nBlobOfft;
	 /* Extract superglobals */
	 if( is_post ){
		 /* $_POST superglobal */
		 pGet = VmExtractSuper(&(*pVm),"_POST",sizeof("_POST")-1);
	 }else{
		 /* $_GET superglobal */
		 pGet = VmExtractSuper(&(*pVm),"_GET",sizeof("_GET")-1);
	 }
	 pRequest = VmExtractSuper(&(*pVm),"_REQUEST",sizeof("_REQUEST")-1);
	 /* Split up the raw query */
	 for(;;){
		 /* Jump leading white spaces */
		 while(zIn < zEnd  && SyisSpace(zIn[0]) ){
			 zIn++;
		 }
		 if( zIn >= zEnd ){
			 break;
		 }
		 zPtr = zIn;
		 while( zPtr < zEnd && zPtr[0] != '=' && zPtr[0] != '&' && zPtr[0] != ';' ){
			 zPtr++;
		 }
		 /* Reset the working buffer */
		 SyBlobReset(pWorker);
		 /* Decode the entry */
		 SyUriDecode(zIn,(sxu32)(zPtr-zIn),PH7_VmBlobConsumer,pWorker,TRUE);
		 /* Save the entry */
		 sName.nByte = SyBlobLength(pWorker);
		 sValue.zString = 0;
		 sValue.nByte = 0;
		 if( zPtr < zEnd && zPtr[0] == '=' ){
			 zPtr++;
			 zIn = zPtr;
			 /* Store field value */
			 while( zPtr < zEnd && zPtr[0] != '&' && zPtr[0] != ';' ){
				 zPtr++;
			 }
			 if( zPtr > zIn ){
				 /* Decode the value */
				  nBlobOfft = SyBlobLength(pWorker);
				  SyUriDecode(zIn,(sxu32)(zPtr-zIn),PH7_VmBlobConsumer,pWorker,TRUE);
				  sValue.zString = (const char *)SyBlobDataAt(pWorker,nBlobOfft);
				  sValue.nByte = SyBlobLength(pWorker) - nBlobOfft;
				 
			 }
			 /* Synchronize pointers */
			 zIn = zPtr;
		 }
		 sName.zString = (const char *)SyBlobData(pWorker);
		 /* Install the decoded query in the $_GET/$_REQUEST array */
		 if( pGet && (pGet->iFlags & MEMOBJ_HASHMAP) ){
			 VmHashmapInsert((ph7_hashmap *)pGet->x.pOther,
				 sName.zString,(int)sName.nByte,
				 sValue.zString,(int)sValue.nByte
				 );
		 }
		 if( pRequest && (pRequest->iFlags & MEMOBJ_HASHMAP) ){
			 VmHashmapInsert((ph7_hashmap *)pRequest->x.pOther,
				 sName.zString,(int)sName.nByte,
				 sValue.zString,(int)sValue.nByte
					 );
		 }
		 /* Advance the pointer */
		 zIn = &zPtr[1];
	 }
	/* All done*/
	return SXRET_OK;
 }
 /*
  * Extract MIME header value from the given set.
  * Return header value on success. NULL otherwise.
  */
 static SyString * VmHttpExtractHeaderValue(SySet *pSet,const char *zMime,sxu32 nByte)
 {
	 SyhttpHeader *aMime,*pMime;
	 SyString sMime;
	 sxu32 n;
	 SyStringInitFromBuf(&sMime,zMime,nByte);
	 /* Point to the MIME entries */
	 aMime = (SyhttpHeader *)SySetBasePtr(pSet);
	 /* Perform the lookup */
	 for( n = 0 ; n < SySetUsed(pSet) ; ++n ){
		 pMime = &aMime[n];
		 if( SyStringCmp(&sMime,&pMime->sName,SyStrnicmp) == 0 ){
			 /* Header found,return it's associated value */
			 return &pMime->sValue;
		 }
	 }
	 /* No such MIME header */
	 return 0;
 }
 /*
  * Tokenize and decode a raw "Cookie:" MIME header into a name value pair
  * and insert it's fields [i.e name,value] in the $_COOKIE superglobal.
  */
 static sxi32 VmHttpPorcessCookie(ph7_vm *pVm,SyBlob *pWorker,const char *zIn,sxu32 nByte)
 {
	 const char *zPtr,*zDelimiter,*zEnd = &zIn[nByte];
	 SyString sName,sValue;
	 ph7_value *pCookie;
	 sxu32 nOfft;
	 /* Make sure the $_COOKIE superglobal is available */
	 pCookie = VmExtractSuper(&(*pVm),"_COOKIE",sizeof("_COOKIE")-1);
	 if( pCookie == 0 || (pCookie->iFlags & MEMOBJ_HASHMAP) == 0 ){
		 /* $_COOKIE superglobal not available */
		 return SXERR_NOTFOUND;
	 }	
	 for(;;){
		  /* Jump leading white spaces */
		 while( zIn < zEnd && SyisSpace(zIn[0]) ){
			 zIn++;
		 }
		 if( zIn >= zEnd ){
			 break;
		 }
		  /* Reset the working buffer */
		 SyBlobReset(pWorker);
		 zDelimiter = zIn;
		 /* Delimit the name[=value]; pair */ 
		 while( zDelimiter < zEnd && zDelimiter[0] != ';' ){
			 zDelimiter++;
		 }
		 zPtr = zIn;
		 while( zPtr < zDelimiter && zPtr[0] != '=' ){
			 zPtr++;
		 }
		 /* Decode the cookie */
		 SyUriDecode(zIn,(sxu32)(zPtr-zIn),PH7_VmBlobConsumer,pWorker,TRUE);
		 sName.nByte = SyBlobLength(pWorker);
		 zPtr++;
		 sValue.zString = 0;
		 sValue.nByte = 0;
		 if( zPtr < zDelimiter ){
			 /* Got a Cookie value */
			 nOfft = SyBlobLength(pWorker);
			 SyUriDecode(zPtr,(sxu32)(zDelimiter-zPtr),PH7_VmBlobConsumer,pWorker,TRUE);
			 SyStringInitFromBuf(&sValue,SyBlobDataAt(pWorker,nOfft),SyBlobLength(pWorker)-nOfft);
		 }
		 /* Synchronize pointers */
		 zIn = &zDelimiter[1];
		 /* Perform the insertion */
		 sName.zString = (const char *)SyBlobData(pWorker);
		 VmHashmapInsert((ph7_hashmap *)pCookie->x.pOther,
			 sName.zString,(int)sName.nByte,
			 sValue.zString,(int)sValue.nByte
			 );
	 }
	 return SXRET_OK;
 }
 /*
  * Process a full HTTP request and populate the appropriate arrays
  * such as $_SERVER,$_GET,$_POST,$_COOKIE,$_REQUEST,... with the information
  * extracted from the raw HTTP request. As an extension Symisc introduced 
  * the $_HEADER array which hold a copy of the processed HTTP MIME headers
  * and their associated values. [i.e: $_HEADER['Server'],$_HEADER['User-Agent'],...].
  * This function return SXRET_OK on success. Any other return value indicates
  * a malformed HTTP request.
  */
 static sxi32 VmHttpProcessRequest(ph7_vm *pVm,const char *zRequest,int nByte)
 {
	 SyString *pName,*pValue,sRequest; /* Raw HTTP request */
	 ph7_value *pHeaderArray;          /* $_HEADER superglobal (Symisc eXtension to the PHP specification)*/
	 SyhttpHeader *pHeader;            /* MIME header */
	 SyhttpUri sUri;     /* Parse of the raw URI*/
	 SyBlob sWorker;     /* General purpose working buffer */
	 SySet sHeader;      /* MIME headers set */
	 sxi32 iMethod;      /* HTTP method [i.e: GET,POST,HEAD...]*/
	 sxi32 iVer;         /* HTTP protocol version */
	 sxi32 rc;
	 SyStringInitFromBuf(&sRequest,zRequest,nByte);
	 SySetInit(&sHeader,&pVm->sAllocator,sizeof(SyhttpHeader));
	 SyBlobInit(&sWorker,&pVm->sAllocator);
	 /* Ignore leading and trailing white spaces*/
	 SyStringFullTrim(&sRequest);
	 /* Process the first line */
	 rc = VmHttpProcessFirstLine(&sRequest,&iMethod,&sUri,&iVer);
	 if( rc != SXRET_OK ){
		 return rc;
	 }
	 /* Process MIME headers */
	 VmHttpExtractHeaders(&sRequest,&sHeader);
	 /*
	  * Setup $_SERVER environments 
	  */
	 /* 'SERVER_PROTOCOL': Name and revision of the information protocol via which the page was requested */
	 ph7_vm_config(pVm,
		 PH7_VM_CONFIG_SERVER_ATTR,
		 "SERVER_PROTOCOL",
		 iVer == HTTP_PROTO_10 ? "HTTP/1.0" : "HTTP/1.1",
		 sizeof("HTTP/1.1")-1
		 );
	 /* 'REQUEST_METHOD':  Which request method was used to access the page */
	 ph7_vm_config(pVm,
		 PH7_VM_CONFIG_SERVER_ATTR,
		 "REQUEST_METHOD",
		 iMethod == HTTP_METHOD_GET ?   "GET" : 
		 (iMethod == HTTP_METHOD_POST ? "POST":
		 (iMethod == HTTP_METHOD_PUT  ? "PUT" :
		 (iMethod == HTTP_METHOD_HEAD ?  "HEAD" : "OTHER"))),
		 -1 /* Compute attribute length automatically */
		 );
	 if( SyStringLength(&sUri.sQuery) > 0 && iMethod == HTTP_METHOD_GET ){
		 pValue = &sUri.sQuery;
		 /* 'QUERY_STRING': The query string, if any, via which the page was accessed */
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "QUERY_STRING",
			 pValue->zString,
			 pValue->nByte
			 );
		 /* Decoded the raw query */
		 VmHttpSplitEncodedQuery(&(*pVm),pValue,&sWorker,FALSE);
	 }
	 /* REQUEST_URI: The URI which was given in order to access this page; for instance, '/index.html' */
	 pValue = &sUri.sRaw;
	 ph7_vm_config(pVm,
		 PH7_VM_CONFIG_SERVER_ATTR,
		 "REQUEST_URI",
		 pValue->zString,
		 pValue->nByte
		 );
	 /*
	  * 'PATH_INFO'
	  * 'ORIG_PATH_INFO' 
      * Contains any client-provided pathname information trailing the actual script filename but preceding
	  * the query string, if available. For instance, if the current script was accessed via the URL
	  * http://www.example.com/php/path_info.php/some/stuff?foo=bar, then $_SERVER['PATH_INFO'] would contain
	  * /some/stuff. 
	  */
	 pValue = &sUri.sPath;
	 ph7_vm_config(pVm,
		 PH7_VM_CONFIG_SERVER_ATTR,
		 "PATH_INFO",
		 pValue->zString,
		 pValue->nByte
		 );
	 ph7_vm_config(pVm,
		 PH7_VM_CONFIG_SERVER_ATTR,
		 "ORIG_PATH_INFO",
		 pValue->zString,
		 pValue->nByte
		 );
	 /* 'HTTP_ACCEPT': Contents of the Accept: header from the current request, if there is one */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Accept",sizeof("Accept")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_ACCEPT",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* 'HTTP_ACCEPT_CHARSET': Contents of the Accept-Charset: header from the current request, if there is one. */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Accept-Charset",sizeof("Accept-Charset")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_ACCEPT_CHARSET",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* 'HTTP_ACCEPT_ENCODING': Contents of the Accept-Encoding: header from the current request, if there is one. */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Accept-Encoding",sizeof("Accept-Encoding")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_ACCEPT_ENCODING",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	  /* 'HTTP_ACCEPT_LANGUAGE': Contents of the Accept-Language: header from the current request, if there is one */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Accept-Language",sizeof("Accept-Language")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_ACCEPT_LANGUAGE",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* 'HTTP_CONNECTION': Contents of the Connection: header from the current request, if there is one. */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Connection",sizeof("Connection")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_CONNECTION",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* 'HTTP_HOST': Contents of the Host: header from the current request, if there is one. */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Host",sizeof("Host")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_HOST",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* 'HTTP_REFERER': Contents of the Referer: header from the current request, if there is one. */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Referer",sizeof("Referer")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_REFERER",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* 'HTTP_USER_AGENT': Contents of the Referer: header from the current request, if there is one. */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"User-Agent",sizeof("User-Agent")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "HTTP_USER_AGENT",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	  /* 'PHP_AUTH_DIGEST': When doing Digest HTTP authentication this variable is set to the 'Authorization'
	   * header sent by the client (which you should then use to make the appropriate validation).
	   */
	 pValue = VmHttpExtractHeaderValue(&sHeader,"Authorization",sizeof("Authorization")-1);
	 if( pValue ){
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "PHP_AUTH_DIGEST",
			 pValue->zString,
			 pValue->nByte
		 );
		 ph7_vm_config(pVm,
			 PH7_VM_CONFIG_SERVER_ATTR,
			 "PHP_AUTH",
			 pValue->zString,
			 pValue->nByte
		 );
	 }
	 /* Install all clients HTTP headers in the $_HEADER superglobal */
	 pHeaderArray = VmExtractSuper(&(*pVm),"_HEADER",sizeof("_HEADER")-1);
	 /* Iterate throw the available MIME headers*/
	 SySetResetCursor(&sHeader);
	 pHeader = 0; /* stupid cc warning */
	 while( SXRET_OK == SySetGetNextEntry(&sHeader,(void **)&pHeader) ){
		 pName  = &pHeader->sName;
		 pValue = &pHeader->sValue;
		 if( pHeaderArray && (pHeaderArray->iFlags & MEMOBJ_HASHMAP)){
			 /* Insert the MIME header and it's associated value */
			 VmHashmapInsert((ph7_hashmap *)pHeaderArray->x.pOther,
				 pName->zString,(int)pName->nByte,
				 pValue->zString,(int)pValue->nByte
				 );
		 }
		 if( pName->nByte == sizeof("Cookie")-1 && SyStrnicmp(pName->zString,"Cookie",sizeof("Cookie")-1) == 0 
			 && pValue->nByte > 0){
				 /* Process the name=value pair and insert them in the $_COOKIE superglobal array */
				 VmHttpPorcessCookie(&(*pVm),&sWorker,pValue->zString,pValue->nByte);
		 }
	 }
	 if( iMethod == HTTP_METHOD_POST ){
		 /* Extract raw POST data */
		 pValue = VmHttpExtractHeaderValue(&sHeader,"Content-Type",sizeof("Content-Type") - 1);
		 if( pValue && pValue->nByte >= sizeof("application/x-www-form-urlencoded") - 1 &&
			 SyMemcmp("application/x-www-form-urlencoded",pValue->zString,pValue->nByte) == 0 ){
				 /* Extract POST data length */
				 pValue = VmHttpExtractHeaderValue(&sHeader,"Content-Length",sizeof("Content-Length") - 1);
				 if( pValue ){
					 sxi32 iLen = 0; /* POST data length */
					 SyStrToInt32(pValue->zString,pValue->nByte,(void *)&iLen,0);
					 if( iLen > 0 ){
						 /* Remove leading and trailing white spaces */
						 SyStringFullTrim(&sRequest);
						 if( (int)sRequest.nByte > iLen ){
							 sRequest.nByte = (sxu32)iLen;
						 }
						 /* Decode POST data now */
						 VmHttpSplitEncodedQuery(&(*pVm),&sRequest,&sWorker,TRUE);
					 }
				 }
		 }
	 }
	 /* All done,clean-up the mess left behind */
	 SySetRelease(&sHeader);
	 SyBlobRelease(&sWorker);
	 return SXRET_OK;
 }

/*
 * ----------------------------------------------------------
 * File: vfs.c
 * MD5: bfe61218da83cefd9f25149de0610d3b
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: vfs.c v2.1 Win7 2012-05-24 01:18 devel <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/*
 * This file implement a virtual file systems (VFS) for the PH7 engine.
 */
/*
 * Given a string containing the path of a file or directory, this function 
 * return the parent directory's path.
 */
PH7_PRIVATE const char * PH7_ExtractDirName(const char *zPath,int nByte,int *pLen)
{
	const char *zEnd = &zPath[nByte - 1];
	int c,d;
	c = d = '/';
#ifdef __WINNT__
	d = '\\';
#endif
	while( zEnd > zPath && ( (int)zEnd[0] != c && (int)zEnd[0] != d ) ){
		zEnd--;
	}
	*pLen = (int)(zEnd-zPath);
#ifdef __WINNT__
	if( (*pLen) == (int)sizeof(char) && zPath[0] == '/' ){
		/* Normalize path on windows */
		return "\\";
	}
#endif
	if( zEnd == zPath && ( (int)zEnd[0] != c && (int)zEnd[0] != d) ){
		/* No separator,return "." as the current directory */
		*pLen = sizeof(char);
		return ".";
	}
	if( (*pLen) == 0 ){
		*pLen = sizeof(char);
#ifdef __WINNT__
		return "\\";
#else
		return "/";
#endif
	}
	return zPath;
}
/*
 * Omit the vfs layer implementation from the built if the PH7_DISABLE_BUILTIN_FUNC directive is defined.
 */
#ifndef PH7_DISABLE_BUILTIN_FUNC
/*
 * bool chdir(string $directory)
 *  Change the current directory.
 * Parameters
 *  $directory
 *   The new current directory
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_chdir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xChdir == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xChdir(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool chroot(string $directory)
 *  Change the root directory.
 * Parameters
 *  $directory
 *   The path to change the root directory to
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_chroot(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xChroot == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xChroot(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * string getcwd(void)
 *  Gets the current working directory.
 * Parameters
 *  None
 * Return
 *  Returns the current working directory on success, or FALSE on failure.
 */
static int PH7_vfs_getcwd(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	int rc;
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xGetcwd == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	ph7_result_string(pCtx,"",0);
	/* Perform the requested operation */
	rc = pVfs->xGetcwd(pCtx);
	if( rc != PH7_OK ){
		/* Error,return FALSE */
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * bool rmdir(string $directory)
 *  Removes directory.
 * Parameters
 *  $directory
 *   The path to the directory
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_rmdir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xRmdir == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xRmdir(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool is_dir(string $filename)
 *  Tells whether the given filename is a directory.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_is_dir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xIsdir == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xIsdir(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool mkdir(string $pathname[,int $mode = 0777 [,bool $recursive = false])
 *  Make a directory.
 * Parameters
 *  $pathname
 *   The directory path.
 * $mode
 *  The mode is 0777 by default, which means the widest possible access.
 *  Note:
 *   mode is ignored on Windows.
 *   Note that you probably want to specify the mode as an octal number, which means
 *   it should have a leading zero. The mode is also modified by the current umask
 *   which you can change using umask().
 * $recursive
 *  Allows the creation of nested directories specified in the pathname.
 *  Defaults to FALSE. (Not used)
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_mkdir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iRecursive = 0;
	const char *zPath;
	ph7_vfs *pVfs;
	int iMode,rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xMkdir == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
#ifdef __WINNT__
	iMode = 0;
#else
	/* Assume UNIX */
	iMode = 0777;
#endif
	if( nArg > 1 ){
		iMode = ph7_value_to_int(apArg[1]);
		if( nArg > 2 ){
			iRecursive = ph7_value_to_bool(apArg[2]);
		}
	}
	/* Perform the requested operation */
	rc = pVfs->xMkdir(zPath,iMode,iRecursive);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool rename(string $oldname,string $newname)
 *  Attempts to rename oldname to newname.
 * Parameters
 *  $oldname
 *   Old name.
 *  $newname
 *   New name.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_rename(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zOld,*zNew;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xRename == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zOld = ph7_value_to_string(apArg[0],0);
	zNew = ph7_value_to_string(apArg[1],0);
	rc = pVfs->xRename(zOld,zNew);
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK );
	return PH7_OK;
}
/*
 * string realpath(string $path)
 *  Returns canonicalized absolute pathname.
 * Parameters
 *  $path
 *   Target path.
 * Return
 *  Canonicalized absolute pathname on success. or FALSE on failure.
 */
static int PH7_vfs_realpath(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
        int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xRealpath == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Set an empty string untnil the underlying OS interface change that */
	ph7_result_string(pCtx,"",0);
	/* Perform the requested operation */
	zPath = ph7_value_to_string(apArg[0],0);
	rc = pVfs->xRealpath(zPath,pCtx);
	if( rc != PH7_OK ){
	 ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int sleep(int $seconds)
 *  Delays the program execution for the given number of seconds.
 * Parameters
 *  $seconds
 *   Halt time in seconds.
 * Return
 *  Zero on success or FALSE on failure.
 */
static int PH7_vfs_sleep(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	int rc,nSleep;
	if( nArg < 1 || !ph7_value_is_int(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xSleep == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Amount to sleep */
	nSleep = ph7_value_to_int(apArg[0]);
	if( nSleep < 0 ){
		/* Invalid value,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation (Microseconds) */
	rc = pVfs->xSleep((unsigned int)(nSleep * SX_USEC_PER_SEC));
	if( rc != PH7_OK ){
		/* Return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return zero */
		ph7_result_int(pCtx,0);
	}
	return PH7_OK;
}
/*
 * void usleep(int $micro_seconds)
 *  Delays program execution for the given number of micro seconds.
 * Parameters
 *  $micro_seconds
 *   Halt time in micro seconds. A micro second is one millionth of a second.
 * Return
 *  None.
 */
static int PH7_vfs_usleep(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	int nSleep;
	if( nArg < 1 || !ph7_value_is_int(apArg[0]) ){
		/* Missing/Invalid argument,return immediately */
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xSleep == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);
		return PH7_OK;
	}
	/* Amount to sleep */
	nSleep = ph7_value_to_int(apArg[0]);
	if( nSleep < 0 ){
		/* Invalid value,return immediately */
		return PH7_OK;
	}
	/* Perform the requested operation (Microseconds) */
	pVfs->xSleep((unsigned int)nSleep);
	return PH7_OK;
}
/*
 * bool unlink (string $filename)
 *  Delete a file.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_unlink(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xUnlink == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xUnlink(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool chmod(string $filename,int $mode)
 *  Attempts to change the mode of the specified file to that given in mode.
 * Parameters
 *  $filename
 *   Path to the file.
 * $mode
 *   Mode (Must be an integer)
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_chmod(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int iMode;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xChmod == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Extract the mode */
	iMode = ph7_value_to_int(apArg[1]);
	/* Perform the requested operation */
	rc = pVfs->xChmod(zPath,iMode);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool chown(string $filename,string $user)
 *  Attempts to change the owner of the file filename to user user.
 * Parameters
 *  $filename
 *   Path to the file.
 * $user
 *   Username.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_chown(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath,*zUser;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xChown == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Extract the user */
	zUser = ph7_value_to_string(apArg[1],0);
	/* Perform the requested operation */
	rc = pVfs->xChown(zPath,zUser);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool chgrp(string $filename,string $group)
 *  Attempts to change the group of the file filename to group.
 * Parameters
 *  $filename
 *   Path to the file.
 * $group
 *   groupname.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_chgrp(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath,*zGroup;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xChgrp == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Extract the user */
	zGroup = ph7_value_to_string(apArg[1],0);
	/* Perform the requested operation */
	rc = pVfs->xChgrp(zPath,zGroup);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * int64 disk_free_space(string $directory)
 *  Returns available space on filesystem or disk partition.
 * Parameters
 *  $directory
 *   A directory of the filesystem or disk partition.
 * Return
 *  Returns the number of available bytes as a 64-bit integer or FALSE on failure.
 */
static int PH7_vfs_disk_free_space(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_int64 iSize;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFreeSpace == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	iSize = pVfs->xFreeSpace(zPath);
	/* IO return value */
	ph7_result_int64(pCtx,iSize);
	return PH7_OK;
}
/*
 * int64 disk_total_space(string $directory)
 *  Returns the total size of a filesystem or disk partition.
 * Parameters
 *  $directory
 *   A directory of the filesystem or disk partition.
 * Return
 *  Returns the number of available bytes as a 64-bit integer or FALSE on failure.
 */
static int PH7_vfs_disk_total_space(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_int64 iSize;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xTotalSpace == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	iSize = pVfs->xTotalSpace(zPath);
	/* IO return value */
	ph7_result_int64(pCtx,iSize);
	return PH7_OK;
}
/*
 * bool file_exists(string $filename)
 *  Checks whether a file or directory exists.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_file_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFileExists == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xFileExists(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * int64 file_size(string $filename)
 *  Gets the size for the given file.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  File size on success or FALSE on failure.
 */
static int PH7_vfs_file_size(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_int64 iSize;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFileSize == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	iSize = pVfs->xFileSize(zPath);
	/* IO return value */
	ph7_result_int64(pCtx,iSize);
	return PH7_OK;
}
/*
 * int64 fileatime(string $filename)
 *  Gets the last access time of the given file.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  File atime on success or FALSE on failure.
 */
static int PH7_vfs_file_atime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_int64 iTime;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFileAtime == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	iTime = pVfs->xFileAtime(zPath);
	/* IO return value */
	ph7_result_int64(pCtx,iTime);
	return PH7_OK;
}
/*
 * int64 filemtime(string $filename)
 *  Gets file modification time.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  File mtime on success or FALSE on failure.
 */
static int PH7_vfs_file_mtime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_int64 iTime;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFileMtime == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	iTime = pVfs->xFileMtime(zPath);
	/* IO return value */
	ph7_result_int64(pCtx,iTime);
	return PH7_OK;
}
/*
 * int64 filectime(string $filename)
 *  Gets inode change time of file.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  File ctime on success or FALSE on failure.
 */
static int PH7_vfs_file_ctime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_int64 iTime;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFileCtime == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	iTime = pVfs->xFileCtime(zPath);
	/* IO return value */
	ph7_result_int64(pCtx,iTime);
	return PH7_OK;
}
/*
 * bool is_file(string $filename)
 *  Tells whether the filename is a regular file.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_is_file(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xIsfile == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xIsfile(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool is_link(string $filename)
 *  Tells whether the filename is a symbolic link.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_is_link(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xIslink == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xIslink(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool is_readable(string $filename)
 *  Tells whether a file exists and is readable.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_is_readable(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xReadable == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xReadable(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool is_writable(string $filename)
 *  Tells whether the filename is writable.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_is_writable(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xWritable == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xWritable(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * bool is_executable(string $filename)
 *  Tells whether the filename is executable.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_is_executable(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xExecutable == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xExecutable(zPath);
	/* IO return value */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * string filetype(string $filename)
 *  Gets file type.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  The type of the file. Possible values are fifo, char, dir, block, link
 *  file, socket and unknown.
 */
static int PH7_vfs_filetype(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	ph7_vfs *pVfs;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return 'unknown' */
		ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xFiletype == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the desired directory */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Set the empty string as the default return value */
	ph7_result_string(pCtx,"",0);
	/* Perform the requested operation */
	pVfs->xFiletype(zPath,pCtx);
	return PH7_OK;
}
/*
 * array stat(string $filename)
 *  Gives information about a file.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  An associative array on success holding the following entries on success
 *  0   dev     device number
 * 1    ino     inode number (zero on windows)
 * 2    mode    inode protection mode
 * 3    nlink   number of links
 * 4    uid     userid of owner (zero on windows)
 * 5    gid     groupid of owner (zero on windows)
 * 6    rdev    device type, if inode device
 * 7    size    size in bytes
 * 8    atime   time of last access (Unix timestamp)
 * 9    mtime   time of last modification (Unix timestamp)
 * 10   ctime   time of last inode change (Unix timestamp)
 * 11   blksize blocksize of filesystem IO (zero on windows)
 * 12   blocks  number of 512-byte blocks allocated.
 * Note:
 *  FALSE is returned on failure.
 */
static int PH7_vfs_stat(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pValue;
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xStat == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Create the array and the working value */
	pArray = ph7_context_new_array(pCtx);
	pValue = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pValue == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xStat(zPath,pArray,pValue);
	if( rc != PH7_OK ){
		/* IO error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return the associative array */
		ph7_result_value(pCtx,pArray);
	}
	/* Don't worry about freeing memory here,everything will be released
	 * automatically as soon we return from this function. */
	return PH7_OK;
}
/*
 * array lstat(string $filename)
 *  Gives information about a file or symbolic link.
 * Parameters
 *  $filename
 *   Path to the file.
 * Return
 *  An associative array on success holding the following entries on success
 *  0   dev     device number
 * 1    ino     inode number (zero on windows)
 * 2    mode    inode protection mode
 * 3    nlink   number of links
 * 4    uid     userid of owner (zero on windows)
 * 5    gid     groupid of owner (zero on windows)
 * 6    rdev    device type, if inode device
 * 7    size    size in bytes
 * 8    atime   time of last access (Unix timestamp)
 * 9    mtime   time of last modification (Unix timestamp)
 * 10   ctime   time of last inode change (Unix timestamp)
 * 11   blksize blocksize of filesystem IO (zero on windows)
 * 12   blocks  number of 512-byte blocks allocated.
 * Note:
 *  FALSE is returned on failure.
 */
static int PH7_vfs_lstat(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pValue;
	const char *zPath;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xlStat == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Create the array and the working value */
	pArray = ph7_context_new_array(pCtx);
	pValue = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pValue == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zPath = ph7_value_to_string(apArg[0],0);
	/* Perform the requested operation */
	rc = pVfs->xlStat(zPath,pArray,pValue);
	if( rc != PH7_OK ){
		/* IO error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return the associative array */
		ph7_result_value(pCtx,pArray);
	}
	/* Don't worry about freeing memory here,everything will be released
	 * automatically as soon we return from this function. */
	return PH7_OK;
}
/*
 * string getenv(string $varname)
 *  Gets the value of an environment variable.
 * Parameters
 *  $varname
 *   The variable name.
 * Return
 *  Returns the value of the environment variable varname, or FALSE if the environment
 * variable varname does not exist. 
 */
static int PH7_vfs_getenv(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zEnv;
	ph7_vfs *pVfs;
	int iLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xGetenv == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the environment variable */
	zEnv = ph7_value_to_string(apArg[0],&iLen);
	/* Set a boolean FALSE as the default return value */
	ph7_result_bool(pCtx,0);
	if( iLen < 1 ){
		/* Empty string */
		return PH7_OK;
	}
	/* Perform the requested operation */
	pVfs->xGetenv(zEnv,pCtx);
	return PH7_OK;
}
/*
 * bool putenv(string $settings)
 *  Set the value of an environment variable.
 * Parameters
 *  $setting
 *   The setting, like "FOO=BAR"
 * Return
 *  TRUE on success or FALSE on failure.  
 */
static int PH7_vfs_putenv(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zName,*zValue;
	char *zSettings,*zEnd;
	ph7_vfs *pVfs;
	int iLen,rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the setting variable */
	zSettings = (char *)ph7_value_to_string(apArg[0],&iLen);
	if( iLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Parse the setting */
	zEnd = &zSettings[iLen];
	zValue = 0;
	zName = zSettings;
	while( zSettings < zEnd ){
		if( zSettings[0] == '=' ){
			/* Null terminate the name */
			zSettings[0] = 0;
			zValue = &zSettings[1];
			break;
		}
		zSettings++;
	}
	/* Install the environment variable in the $_Env array */
	if( zValue == 0 || zName[0] == 0 || zValue >= zEnd || zName >= zValue ){
		/* Invalid settings,retun FALSE */
		ph7_result_bool(pCtx,0);
		if( zSettings  < zEnd ){
			zSettings[0] = '=';
		}
		return PH7_OK;
	}
	ph7_vm_config(pCtx->pVm,PH7_VM_CONFIG_ENV_ATTR,zName,zValue,(int)(zEnd-zValue));
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xSetenv == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		zSettings[0] = '=';
		return PH7_OK;
	}
	/* Perform the requested operation */
	rc = pVfs->xSetenv(zName,zValue);
	ph7_result_bool(pCtx,rc == PH7_OK );
	zSettings[0] = '=';
	return PH7_OK;
}
/*
 * bool touch(string $filename[,int64 $time = time()[,int64 $atime]])
 *  Sets access and modification time of file.
 * Note: On windows
 *   If the file does not exists,it will not be created.
 * Parameters
 *  $filename
 *   The name of the file being touched.
 *  $time
 *   The touch time. If time is not supplied, the current system time is used.
 * $atime
 *   If present, the access time of the given filename is set to the value of atime.
 *   Otherwise, it is set to the value passed to the time parameter. If neither are 
 *   present, the current system time is used.
 * Return
 *  TRUE on success or FALSE on failure.
*/
static int PH7_vfs_touch(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_int64 nTime,nAccess;
	const char *zFile;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xTouch == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nTime = nAccess = -1;
	zFile = ph7_value_to_string(apArg[0],0);
	if( nArg > 1 ){
		nTime = ph7_value_to_int64(apArg[1]);
		if( nArg > 2 ){
			nAccess = ph7_value_to_int64(apArg[1]);
		}else{
			nAccess = nTime;
		}
	}
	rc = pVfs->xTouch(zFile,nTime,nAccess);
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * Path processing functions that do not need access to the VFS layer
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * string dirname(string $path)
 *  Returns parent directory's path.
 * Parameters
 * $path
 *  Target path.
 *  On Windows, both slash (/) and backslash (\) are used as directory separator character.
 *  In other environments, it is the forward slash (/).
 * Return
 *  The path of the parent directory. If there are no slashes in path, a dot ('.') 
 *  is returned, indicating the current directory.
 */
static int PH7_builtin_dirname(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath,*zDir;
	int iLen,iDirlen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Point to the target path */
	zPath = ph7_value_to_string(apArg[0],&iLen);
	if( iLen < 1 ){
		/* Reuturn "." */
		ph7_result_string(pCtx,".",sizeof(char));
		return PH7_OK;
	}
	/* Perform the requested operation */
	zDir = PH7_ExtractDirName(zPath,iLen,&iDirlen);
	/* Return directory name */
	ph7_result_string(pCtx,zDir,iDirlen);
	return PH7_OK;
}
/*
 * string basename(string $path[, string $suffix ])
 *  Returns trailing name component of path.
 * Parameters
 * $path
 *  Target path.
 *  On Windows, both slash (/) and backslash (\) are used as directory separator character.
 *  In other environments, it is the forward slash (/).
 * $suffix
 *  If the name component ends in suffix this will also be cut off.
 * Return
 *  The base name of the given path. 
 */
static int PH7_builtin_basename(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath,*zBase,*zEnd;
	int c,d,iLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	c = d = '/';
#ifdef __WINNT__
	d = '\\';
#endif
	/* Point to the target path */
	zPath = ph7_value_to_string(apArg[0],&iLen);
	if( iLen < 1 ){
		/* Empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zPath[iLen - 1];
	/* Ignore trailing '/' */
	while( zEnd > zPath && ( (int)zEnd[0] == c || (int)zEnd[0] == d ) ){
		zEnd--;
	}
	iLen = (int)(&zEnd[1]-zPath);
	while( zEnd > zPath && ( (int)zEnd[0] != c && (int)zEnd[0] != d ) ){
		zEnd--;
	}
	zBase = (zEnd > zPath) ? &zEnd[1] : zPath;
	zEnd = &zPath[iLen];
	if( nArg > 1 && ph7_value_is_string(apArg[1]) ){
		const char *zSuffix;
		int nSuffix;
		/* Strip suffix */
		zSuffix = ph7_value_to_string(apArg[1],&nSuffix);
		if( nSuffix > 0 && nSuffix < iLen && SyMemcmp(&zEnd[-nSuffix],zSuffix,nSuffix) == 0 ){
			zEnd -= nSuffix;
		}
	}
	/* Store the basename */
	ph7_result_string(pCtx,zBase,(int)(zEnd-zBase));
	return PH7_OK;
}
/*
 * value pathinfo(string $path [,int $options = PATHINFO_DIRNAME | PATHINFO_BASENAME | PATHINFO_EXTENSION | PATHINFO_FILENAME ])
 *  Returns information about a file path.
 * Parameter
 *  $path
 *   The path to be parsed.
 *  $options
 *    If present, specifies a specific element to be returned; one of
 *      PATHINFO_DIRNAME, PATHINFO_BASENAME, PATHINFO_EXTENSION or PATHINFO_FILENAME.
 * Return
 *  If the options parameter is not passed, an associative array containing the following
 *  elements is returned: dirname, basename, extension (if any), and filename. 
 *  If options is present, returns a string containing the requested element. 
 */
typedef struct path_info path_info;
struct path_info
{
	SyString sDir; /* Directory [i.e: /var/www] */
	SyString sBasename; /* Basename [i.e httpd.conf] */
	SyString sExtension; /* File extension [i.e xml,pdf..] */
	SyString sFilename;  /* Filename */
};
/*
 * Extract path fields.
 */
static sxi32 ExtractPathInfo(const char *zPath,int nByte,path_info *pOut)
{
	const char *zPtr,*zEnd = &zPath[nByte - 1];
	SyString *pCur;
	int c,d;
	c = d = '/';
#ifdef __WINNT__
	d = '\\';
#endif
	/* Zero the structure */
	SyZero(pOut,sizeof(path_info));
	/* Handle special case */
	if( nByte == sizeof(char) && ( (int)zPath[0] == c || (int)zPath[0] == d ) ){
#ifdef __WINNT__
		SyStringInitFromBuf(&pOut->sDir,"\\",sizeof(char));
#else
		SyStringInitFromBuf(&pOut->sDir,"/",sizeof(char));
#endif
		return SXRET_OK;
	}
	/* Extract the basename */
	while( zEnd > zPath && ( (int)zEnd[0] != c && (int)zEnd[0] != d ) ){
		zEnd--;
	}
	zPtr = (zEnd > zPath) ? &zEnd[1] : zPath;
	zEnd = &zPath[nByte];
	/* dirname */
	pCur = &pOut->sDir;
	SyStringInitFromBuf(pCur,zPath,zPtr-zPath);
	if( pCur->nByte > 1 ){
		SyStringTrimTrailingChar(pCur,'/');
#ifdef __WINNT__
		SyStringTrimTrailingChar(pCur,'\\');
#endif
	}else if( (int)zPath[0] == c || (int)zPath[0] == d ){
#ifdef __WINNT__
		SyStringInitFromBuf(&pOut->sDir,"\\",sizeof(char));
#else
		SyStringInitFromBuf(&pOut->sDir,"/",sizeof(char));
#endif
	}
	/* basename/filename */
	pCur = &pOut->sBasename;
	SyStringInitFromBuf(pCur,zPtr,zEnd-zPtr);
	SyStringTrimLeadingChar(pCur,'/');
#ifdef __WINNT__
	SyStringTrimLeadingChar(pCur,'\\');
#endif
	SyStringDupPtr(&pOut->sFilename,pCur);
	if( pCur->nByte > 0 ){
		/* extension */
		zEnd--;
		while( zEnd > pCur->zString /*basename*/ && zEnd[0] != '.' ){
			zEnd--;
		}
		if( zEnd > pCur->zString ){
			zEnd++; /* Jump leading dot */
			SyStringInitFromBuf(&pOut->sExtension,zEnd,&zPath[nByte]-zEnd);
			/* Fix filename */
			pCur = &pOut->sFilename;
			if( pCur->nByte > SyStringLength(&pOut->sExtension) ){
				pCur->nByte -= 1 + SyStringLength(&pOut->sExtension);
			}
		}
	}
	return SXRET_OK;
}
/*
 * value pathinfo(string $path [,int $options = PATHINFO_DIRNAME | PATHINFO_BASENAME | PATHINFO_EXTENSION | PATHINFO_FILENAME ])
 *  See block comment above.
 */
static int PH7_builtin_pathinfo(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zPath;
	path_info sInfo;
	SyString *pComp;
	int iLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Point to the target path */
	zPath = ph7_value_to_string(apArg[0],&iLen);
	if( iLen < 1 ){
		/* Empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract path info */
	ExtractPathInfo(zPath,iLen,&sInfo);
	if( nArg > 1 && ph7_value_is_int(apArg[1]) ){
		/* Return path component */
		int nComp = ph7_value_to_int(apArg[1]);
		switch(nComp){
		case 1: /* PATHINFO_DIRNAME */
			pComp = &sInfo.sDir;
			if( pComp->nByte > 0 ){
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}else{
				/* Expand the empty string */
				ph7_result_string(pCtx,"",0);
			}
			break;
		case 2: /*PATHINFO_BASENAME*/
			pComp = &sInfo.sBasename;
			if( pComp->nByte > 0 ){
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}else{
				/* Expand the empty string */
				ph7_result_string(pCtx,"",0);
			}
			break;
		case 3: /*PATHINFO_EXTENSION*/
			pComp = &sInfo.sExtension;
			if( pComp->nByte > 0 ){
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}else{
				/* Expand the empty string */
				ph7_result_string(pCtx,"",0);
			}
			break;
		case 4: /*PATHINFO_FILENAME*/
			pComp = &sInfo.sFilename;
			if( pComp->nByte > 0 ){
				ph7_result_string(pCtx,pComp->zString,(int)pComp->nByte);
			}else{
				/* Expand the empty string */
				ph7_result_string(pCtx,"",0);
			}
			break;
		default:
			/* Expand the empty string */
			ph7_result_string(pCtx,"",0);
			break;
		}
	}else{
		/* Return an associative array */
		ph7_value *pArray,*pValue;
		pArray = ph7_context_new_array(pCtx);
		pValue = ph7_context_new_scalar(pCtx);
		if( pArray == 0 || pValue == 0 ){
			/* Out of mem,return NULL */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* dirname */
		pComp = &sInfo.sDir;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			/* Perform the insertion */
			ph7_array_add_strkey_elem(pArray,"dirname",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		/* basername */
		pComp = &sInfo.sBasename;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			/* Perform the insertion */
			ph7_array_add_strkey_elem(pArray,"basename",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		/* extension */
		pComp = &sInfo.sExtension;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			/* Perform the insertion */
			ph7_array_add_strkey_elem(pArray,"extension",pValue); /* Will make it's own copy */
		}
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		/* filename */
		pComp = &sInfo.sFilename;
		if( pComp->nByte > 0 ){
			ph7_value_string(pValue,pComp->zString,(int)pComp->nByte);
			/* Perform the insertion */
			ph7_array_add_strkey_elem(pArray,"filename",pValue); /* Will make it's own copy */
		}
		/* Return the created array */
		ph7_result_value(pCtx,pArray);
		/* Don't worry about freeing memory, everything will be released
		 * automatically as soon we return from this foreign function.
		 */
	}
	return PH7_OK;
}
/*
 * Globbing implementation extracted from the sqlite3 source tree.
 * Original author: D. Richard Hipp (http://www.sqlite.org)
 * Status: Public Domain
 */
typedef unsigned char u8;
/* An array to map all upper-case characters into their corresponding
** lower-case character. 
**
** SQLite only considers US-ASCII (or EBCDIC) characters.  We do not
** handle case conversions for the UTF character set since the tables
** involved are nearly as big or bigger than SQLite itself.
*/
static const unsigned char sqlite3UpperToLower[] = {
      0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17,
     18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
     36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53,
     54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 97, 98, 99,100,101,102,103,
    104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,
    122, 91, 92, 93, 94, 95, 96, 97, 98, 99,100,101,102,103,104,105,106,107,
    108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,
    126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
    144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,
    162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,
    180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,
    198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,
    216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,
    234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,
    252,253,254,255
};
#define GlogUpperToLower(A)     if( A<0x80 ){ A = sqlite3UpperToLower[A]; }
/*
** Assuming zIn points to the first byte of a UTF-8 character,
** advance zIn to point to the first byte of the next UTF-8 character.
*/
#define SQLITE_SKIP_UTF8(zIn) {                        \
  if( (*(zIn++))>=0xc0 ){                              \
    while( (*zIn & 0xc0)==0x80 ){ zIn++; }             \
  }                                                    \
}
/*
** Compare two UTF-8 strings for equality where the first string can
** potentially be a "glob" expression.  Return true (1) if they
** are the same and false (0) if they are different.
**
** Globbing rules:
**
**      '*'       Matches any sequence of zero or more characters.
**
**      '?'       Matches exactly one character.
**
**     [...]      Matches one character from the enclosed list of
**                characters.
**
**     [^...]     Matches one character not in the enclosed list.
**
** With the [...] and [^...] matching, a ']' character can be included
** in the list by making it the first character after '[' or '^'.  A
** range of characters can be specified using '-'.  Example:
** "[a-z]" matches any single lower-case letter.  To match a '-', make
** it the last character in the list.
**
** This routine is usually quick, but can be N**2 in the worst case.
**
** Hints: to match '*' or '?', put them in "[]".  Like this:
**
**         abc[*]xyz        Matches "abc*xyz" only
*/
static int patternCompare(
  const u8 *zPattern,              /* The glob pattern */
  const u8 *zString,               /* The string to compare against the glob */
  const int esc,                    /* The escape character */
  int noCase
){
  int c, c2;
  int invert;
  int seen;
  u8 matchOne = '?';
  u8 matchAll = '*';
  u8 matchSet = '[';
  int prevEscape = 0;     /* True if the previous character was 'escape' */

  if( !zPattern || !zString ) return 0;
  while( (c = PH7_Utf8Read(zPattern,0,&zPattern))!=0 ){
    if( !prevEscape && c==matchAll ){
      while( (c=PH7_Utf8Read(zPattern,0,&zPattern)) == matchAll
               || c == matchOne ){
        if( c==matchOne && PH7_Utf8Read(zString, 0, &zString)==0 ){
          return 0;
        }
      }
      if( c==0 ){
        return 1;
      }else if( c==esc ){
        c = PH7_Utf8Read(zPattern, 0, &zPattern);
        if( c==0 ){
          return 0;
        }
      }else if( c==matchSet ){
	  if( (esc==0) || (matchSet<0x80) ) return 0;
	  while( *zString && patternCompare(&zPattern[-1],zString,esc,noCase)==0 ){
          SQLITE_SKIP_UTF8(zString);
        }
        return *zString!=0;
      }
      while( (c2 = PH7_Utf8Read(zString,0,&zString))!=0 ){
        if( noCase ){
          GlogUpperToLower(c2);
          GlogUpperToLower(c);
          while( c2 != 0 && c2 != c ){
            c2 = PH7_Utf8Read(zString, 0, &zString);
            GlogUpperToLower(c2);
          }
        }else{
          while( c2 != 0 && c2 != c ){
            c2 = PH7_Utf8Read(zString, 0, &zString);
          }
        }
        if( c2==0 ) return 0;
		if( patternCompare(zPattern,zString,esc,noCase) ) return 1;
      }
      return 0;
    }else if( !prevEscape && c==matchOne ){
      if( PH7_Utf8Read(zString, 0, &zString)==0 ){
        return 0;
      }
    }else if( c==matchSet ){
      int prior_c = 0;
      if( esc == 0 ) return 0;
      seen = 0;
      invert = 0;
      c = PH7_Utf8Read(zString, 0, &zString);
      if( c==0 ) return 0;
      c2 = PH7_Utf8Read(zPattern, 0, &zPattern);
      if( c2=='^' ){
        invert = 1;
        c2 = PH7_Utf8Read(zPattern, 0, &zPattern);
      }
      if( c2==']' ){
        if( c==']' ) seen = 1;
        c2 = PH7_Utf8Read(zPattern, 0, &zPattern);
      }
      while( c2 && c2!=']' ){
        if( c2=='-' && zPattern[0]!=']' && zPattern[0]!=0 && prior_c>0 ){
          c2 = PH7_Utf8Read(zPattern, 0, &zPattern);
          if( c>=prior_c && c<=c2 ) seen = 1;
          prior_c = 0;
        }else{
          if( c==c2 ){
            seen = 1;
          }
          prior_c = c2;
        }
        c2 = PH7_Utf8Read(zPattern, 0, &zPattern);
      }
      if( c2==0 || (seen ^ invert)==0 ){
        return 0;
      }
    }else if( esc==c && !prevEscape ){
      prevEscape = 1;
    }else{
      c2 = PH7_Utf8Read(zString, 0, &zString);
      if( noCase ){
        GlogUpperToLower(c);
        GlogUpperToLower(c2);
      }
      if( c!=c2 ){
        return 0;
      }
      prevEscape = 0;
    }
  }
  return *zString==0;
}
/*
 * Wrapper around patternCompare() defined above.
 * See block comment above for more information.
 */
static int Glob(const unsigned char *zPattern,const unsigned char *zString,int iEsc,int CaseCompare)
{
	int rc;
	if( iEsc < 0 ){
		iEsc = '\\';
	}
	rc = patternCompare(zPattern,zString,iEsc,CaseCompare);
	return rc;
}
/*
 * bool fnmatch(string $pattern,string $string[,int $flags = 0 ])
 *  Match filename against a pattern.
 * Parameters
 *  $pattern
 *   The shell wildcard pattern.
 * $string
 *  The tested string.
 * $flags
 *   A list of possible flags:
 *    FNM_NOESCAPE 	Disable backslash escaping.
 *    FNM_PATHNAME 	Slash in string only matches slash in the given pattern.
 *    FNM_PERIOD 	Leading period in string must be exactly matched by period in the given pattern.
 *    FNM_CASEFOLD 	Caseless match.
 * Return
 *  TRUE if there is a match, FALSE otherwise. 
 */
static int PH7_builtin_fnmatch(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zPattern;
	int iEsc = '\\';
	int noCase = 0;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the pattern and the string */
	zPattern  = ph7_value_to_string(apArg[0],0);
	zString = ph7_value_to_string(apArg[1],0);
	/* Extract the flags if avaialble */
	if( nArg > 2 && ph7_value_is_int(apArg[2]) ){
		rc = ph7_value_to_int(apArg[2]);
		if( rc & 0x01 /*FNM_NOESCAPE*/){
			iEsc = 0;
		}
		if( rc & 0x08 /*FNM_CASEFOLD*/){
			noCase = 1;
		}
	}
	/* Go globbing */
	rc = Glob((const unsigned char *)zPattern,(const unsigned char *)zString,iEsc,noCase);
	/* Globbing result */
	ph7_result_bool(pCtx,rc);
	return PH7_OK;
}
/*
 * bool strglob(string $pattern,string $string)
 *  Match string against a pattern.
 * Parameters
 *  $pattern
 *   The shell wildcard pattern.
 * $string
 *  The tested string.
 * Return
 *  TRUE if there is a match, FALSE otherwise. 
 * Note that this a symisc eXtension.
 */
static int PH7_builtin_strglob(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zPattern;
	int iEsc = '\\';
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the pattern and the string */
	zPattern  = ph7_value_to_string(apArg[0],0);
	zString = ph7_value_to_string(apArg[1],0);
	/* Go globbing */
	rc = Glob((const unsigned char *)zPattern,(const unsigned char *)zString,iEsc,0);
	/* Globbing result */
	ph7_result_bool(pCtx,rc);
	return PH7_OK;
}
/*
 * bool link(string $target,string $link)
 *  Create a hard link.
 * Parameters
 *  $target
 *   Target of the link.
 *  $link
 *   The link name.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_link(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zTarget,*zLink;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xLink == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the given arguments */
	zTarget  = ph7_value_to_string(apArg[0],0);
	zLink = ph7_value_to_string(apArg[1],0);
	/* Perform the requested operation */
	rc = pVfs->xLink(zTarget,zLink,0/*Not a symbolic link */);
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK );
	return PH7_OK;
}
/*
 * bool symlink(string $target,string $link)
 *  Creates a symbolic link.
 * Parameters
 *  $target
 *   Target of the link.
 *  $link
 *   The link name.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_vfs_symlink(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zTarget,*zLink;
	ph7_vfs *pVfs;
	int rc;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xLink == 0 ){
		/* IO routine not implemented,return NULL */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS,PH7 is returning FALSE",
			ph7_function_name(pCtx)
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the given arguments */
	zTarget  = ph7_value_to_string(apArg[0],0);
	zLink = ph7_value_to_string(apArg[1],0);
	/* Perform the requested operation */
	rc = pVfs->xLink(zTarget,zLink,1/*A symbolic link */);
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK );
	return PH7_OK;
}
/*
 * int umask([ int $mask ])
 *  Changes the current umask.
 * Parameters
 *  $mask
 *   The new umask.
 * Return
 *  umask() without arguments simply returns the current umask.
 *  Otherwise the old umask is returned.
 */
static int PH7_vfs_umask(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iOld,iNew;
	ph7_vfs *pVfs;
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xUmask == 0 ){
		/* IO routine not implemented,return -1 */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	iNew = 0;
	if( nArg > 0 ){
		iNew = ph7_value_to_int(apArg[0]);
	}
	/* Perform the requested operation */
	iOld = pVfs->xUmask(iNew);
	/* Old mask */
	ph7_result_int(pCtx,iOld);
	return PH7_OK;
}
/*
 * string sys_get_temp_dir()
 *  Returns directory path used for temporary files.
 * Parameters
 *  None
 * Return
 *  Returns the path of the temporary directory.
 */
static int PH7_vfs_sys_get_temp_dir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	/* Set the empty string as the default return value */
	ph7_result_string(pCtx,"",0);
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xTempDir == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* IO routine not implemented,return "" */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);		
		return PH7_OK;
	}
	/* Perform the requested operation */
	pVfs->xTempDir(pCtx);
	return PH7_OK;
}
/*
 * string get_current_user()
 *  Returns the name of the current working user.
 * Parameters
 *  None
 * Return
 *  Returns the name of the current working user.
 */
static int PH7_vfs_get_current_user(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xUsername == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* IO routine not implemented */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);		
		/* Set a dummy username */
		ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pVfs->xUsername(pCtx);
	return PH7_OK;
}
/*
 * int64 getmypid()
 *  Gets process ID.
 * Parameters
 *  None
 * Return
 *  Returns the process ID.
 */
static int PH7_vfs_getmypid(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_int64 nProcessId;
	ph7_vfs *pVfs;
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xProcessId == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* IO routine not implemented,return -1 */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nProcessId = (ph7_int64)pVfs->xProcessId();
	/* Set the result */
	ph7_result_int64(pCtx,nProcessId);
	return PH7_OK;
}
/*
 * int getmyuid()
 *  Get user ID.
 * Parameters
 *  None
 * Return
 *  Returns the user ID.
 */
static int PH7_vfs_getmyuid(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	int nUid;
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xUid == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* IO routine not implemented,return -1 */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nUid = pVfs->xUid();
	/* Set the result */
	ph7_result_int(pCtx,nUid);
	return PH7_OK;
}
/*
 * int getmygid()
 *  Get group ID.
 * Parameters
 *  None
 * Return
 *  Returns the group ID.
 */
static int PH7_vfs_getmygid(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_vfs *pVfs;
	int nGid;
	/* Point to the underlying vfs */
	pVfs = (ph7_vfs *)ph7_context_user_data(pCtx);
	if( pVfs == 0 || pVfs->xGid == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* IO routine not implemented,return -1 */
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying VFS",
			ph7_function_name(pCtx)
			);
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nGid = pVfs->xGid();
	/* Set the result */
	ph7_result_int(pCtx,nGid);
	return PH7_OK;
}
#ifdef __WINNT__
#include <Windows.h>
#elif defined(__UNIXES__)
#include <sys/utsname.h>
#endif
/*
 * string php_uname([ string $mode = "a" ])
 *  Returns information about the host operating system.
 * Parameters
 *  $mode
 *   mode is a single character that defines what information is returned:
 *    'a': This is the default. Contains all modes in the sequence "s n r v m".
 *    's': Operating system name. eg. FreeBSD.
 *    'n': Host name. eg. localhost.example.com.
 *    'r': Release name. eg. 5.1.2-RELEASE.
 *    'v': Version information. Varies a lot between operating systems.
 *    'm': Machine type. eg. i386.
 * Return
 *  OS description as a string.
 */
static int PH7_vfs_ph7_uname(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
#if defined(__WINNT__)
	const char *zName = "Microsoft Windows";
	OSVERSIONINFOW sVer;
#elif defined(__UNIXES__)
	struct utsname sName;
#endif
	const char *zMode = "a";
	if( nArg > 0 && ph7_value_is_string(apArg[0]) ){
		/* Extract the desired mode */
		zMode = ph7_value_to_string(apArg[0],0);
	}
#if defined(__WINNT__)
	sVer.dwOSVersionInfoSize = sizeof(sVer);
	if( TRUE != GetVersionExW(&sVer)){
		ph7_result_string(pCtx,zName,-1);
		return PH7_OK;
	}
	if( sVer.dwPlatformId == VER_PLATFORM_WIN32_NT ){
		if( sVer.dwMajorVersion <= 4 ){
			zName = "Microsoft Windows NT";
		}else if( sVer.dwMajorVersion == 5 ){
			switch(sVer.dwMinorVersion){
				case 0:	zName = "Microsoft Windows 2000"; break;
				case 1: zName = "Microsoft Windows XP";   break;
				case 2: zName = "Microsoft Windows Server 2003"; break;
			}
		}else if( sVer.dwMajorVersion == 6){
				switch(sVer.dwMinorVersion){
					case 0: zName = "Microsoft Windows Vista"; break;
					case 1: zName = "Microsoft Windows 7"; break;
					case 2: zName = "Microsoft Windows Server 2008"; break;
					case 3: zName = "Microsoft Windows 8"; break;
					default: break;
				}
		}
	}
	switch(zMode[0]){
	case 's':
		/* Operating system name */
		ph7_result_string(pCtx,zName,-1/* Compute length automatically*/);
		break;
	case 'n':
		/* Host name */
		ph7_result_string(pCtx,"localhost",(int)sizeof("localhost")-1);
		break;
	case 'r':
	case 'v':
		/* Version information. */
		ph7_result_string_format(pCtx,"%u.%u build %u",
			sVer.dwMajorVersion,sVer.dwMinorVersion,sVer.dwBuildNumber
			);
		break;
	case 'm':
		/* Machine name */
		ph7_result_string(pCtx,"x86",(int)sizeof("x86")-1);
		break;
	default:
		ph7_result_string_format(pCtx,"%s localhost %u.%u build %u x86",
			zName,
			sVer.dwMajorVersion,sVer.dwMinorVersion,sVer.dwBuildNumber
			);
		break;
	}
#elif defined(__UNIXES__)
	if( uname(&sName) != 0 ){
		ph7_result_string(pCtx,"Unix",(int)sizeof("Unix")-1);
		return PH7_OK;
	}
	switch(zMode[0]){
	case 's':
		/* Operating system name */
		ph7_result_string(pCtx,sName.sysname,-1/* Compute length automatically*/);
		break;
	case 'n':
		/* Host name */
		ph7_result_string(pCtx,sName.nodename,-1/* Compute length automatically*/);
		break;
	case 'r':
		/* Release information */
		ph7_result_string(pCtx,sName.release,-1/* Compute length automatically*/);
		break;
	case 'v':
		/* Version information. */
		ph7_result_string(pCtx,sName.version,-1/* Compute length automatically*/);
		break;
	case 'm':
		/* Machine name */
		ph7_result_string(pCtx,sName.machine,-1/* Compute length automatically*/);
		break;
	default:
		ph7_result_string_format(pCtx,
			"%s %s %s %s %s",
			sName.sysname,
			sName.release,
			sName.version,
			sName.nodename,
			sName.machine
			);
		break;
	}
#else
	ph7_result_string(pCtx,"Unknown Operating System",(int)sizeof("Unknown Operating System")-1);
#endif
	return PH7_OK;
}
/*
 * Section:
 *    IO stream implementation.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
typedef struct io_private io_private;
struct io_private
{
	const ph7_io_stream *pStream; /* Underlying IO device */
	void *pHandle; /* IO handle */
	/* Unbuffered IO */
	SyBlob sBuffer; /* Working buffer */
	sxu32 nOfft;    /* Current read offset */
	sxu32 iMagic;   /* Sanity check to avoid misuse */
};
#define IO_PRIVATE_MAGIC 0xFEAC14
/* Make sure we are dealing with a valid io_private instance */
#define IO_PRIVATE_INVALID(IO) ( IO == 0 || IO->iMagic != IO_PRIVATE_MAGIC ) 
/* Forward declaration */
static void ResetIOPrivate(io_private *pDev);
/*
 * bool ftruncate(resource $handle,int64 $size)
 *  Truncates a file to a given length.
 * Parameters
 *  $handle
 *   The file pointer.
 *   Note:
 *    The handle must be open for writing.
 * $size
 *   The size to truncate to.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_builtin_ftruncate(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int rc;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xTrunc == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	rc = pStream->xTrunc(pDev->pHandle,ph7_value_to_int64(apArg[1]));
	if( rc == PH7_OK ){
		/* Discard buffered data */
		ResetIOPrivate(pDev);
	}
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;	
}
/*
 * int fseek(resource $handle,int $offset[,int $whence = SEEK_SET ])
 *  Seeks on a file pointer.
 * Parameters
 *  $handle
 *   A file system pointer resource that is typically created using fopen().
 * $offset
 *   The offset.
 *   To move to a position before the end-of-file, you need to pass a negative
 *   value in offset and set whence to SEEK_END.
 *   whence
 *   whence values are:
 *    SEEK_SET - Set position equal to offset bytes.
 *    SEEK_CUR - Set position to current location plus offset.
 *    SEEK_END - Set position to end-of-file plus offset.
 * Return
 *  0 on success,-1 on failure
 */
static int PH7_builtin_fseek(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	ph7_int64 iOfft;
	int whence;  
	int rc;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xSeek == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Extract the offset */
	iOfft = ph7_value_to_int64(apArg[1]);
	whence = 0;/* SEEK_SET */
	if( nArg > 2 && ph7_value_is_int(apArg[2]) ){
		whence = ph7_value_to_int(apArg[2]);
	}
	/* Perform the requested operation */
	rc = pStream->xSeek(pDev->pHandle,iOfft,whence);
	if( rc == PH7_OK ){
		/* Ignore buffered data */
		ResetIOPrivate(pDev);
	}
	/* IO result */
	ph7_result_int(pCtx,rc == PH7_OK ? 0 : - 1);
	return PH7_OK;	
}
/*
 * int64 ftell(resource $handle)
 *  Returns the current position of the file read/write pointer.
 * Parameters
 *  $handle
 *   The file pointer.
 * Return
 *  Returns the position of the file pointer referenced by handle
 *  as an integer; i.e., its offset into the file stream.
 *  FALSE is returned on failure.
 */
static int PH7_builtin_ftell(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	ph7_int64 iOfft;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xTell == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	iOfft = pStream->xTell(pDev->pHandle);
	/* IO result */
	ph7_result_int64(pCtx,iOfft);
	return PH7_OK;	
}
/*
 * bool rewind(resource $handle)
 *  Rewind the position of a file pointer.
 * Parameters
 *  $handle
 *   The file pointer.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_builtin_rewind(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int rc;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xSeek == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	rc = pStream->xSeek(pDev->pHandle,0,0/*SEEK_SET*/);
	if( rc == PH7_OK ){
		/* Ignore buffered data */
		ResetIOPrivate(pDev);
	}
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;	
}
/*
 * bool fflush(resource $handle)
 *  Flushes the output to a file.
 * Parameters
 *  $handle
 *   The file pointer.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_builtin_fflush(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int rc;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0 || pStream->xSync == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	rc = pStream->xSync(pDev->pHandle);
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;	
}
/*
 * bool feof(resource $handle)
 *  Tests for end-of-file on a file pointer.
 * Parameters
 *  $handle
 *   The file pointer.
 * Return
 *  Returns TRUE if the file pointer is at EOF.FALSE otherwise
 */
static int PH7_builtin_feof(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int rc;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,1);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,1);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,1);
		return PH7_OK;
	}
	rc = SXERR_EOF;
	/* Perform the requested operation */
	if( SyBlobLength(&pDev->sBuffer) - pDev->nOfft > 0 ){
		/* Data is available */
		rc = PH7_OK;
	}else{
		char zBuf[4096];
		ph7_int64 n;
		/* Perform a buffered read */
		n = pStream->xRead(pDev->pHandle,zBuf,sizeof(zBuf));
		if( n > 0 ){
			/* Copy buffered data */
			SyBlobAppend(&pDev->sBuffer,zBuf,(sxu32)n);
			rc = PH7_OK;
		}
	}
	/* EOF or not */
	ph7_result_bool(pCtx,rc == SXERR_EOF);
	return PH7_OK;	
}
/*
 * Read n bytes from the underlying IO stream device.
 * Return total numbers of bytes readen on success. A number < 1 on failure 
 * [i.e: IO error ] or EOF.
 */
static ph7_int64 StreamRead(io_private *pDev,void *pBuf,ph7_int64 nLen)
{
	const ph7_io_stream *pStream = pDev->pStream;
	char *zBuf = (char *)pBuf;
	ph7_int64 n,nRead;
	n = SyBlobLength(&pDev->sBuffer) - pDev->nOfft;
	if( n > 0 ){
		if( n > nLen ){
			n = nLen;
		}
		/* Copy the buffered data */
		SyMemcpy(SyBlobDataAt(&pDev->sBuffer,pDev->nOfft),pBuf,(sxu32)n);
		/* Update the read offset */
		pDev->nOfft += (sxu32)n;
		if( pDev->nOfft >= SyBlobLength(&pDev->sBuffer) ){
			/* Reset the working buffer so that we avoid excessive memory allocation */
			SyBlobReset(&pDev->sBuffer);
			pDev->nOfft = 0;
		}
		nLen -= n;
		if( nLen < 1 ){
			/* All done */
			return n;
		}
		/* Advance the cursor */
		zBuf += n;
	}
	/* Read without buffering */
	nRead = pStream->xRead(pDev->pHandle,zBuf,nLen);
	if( nRead > 0 ){
		n += nRead;
	}else if( n < 1 ){
		/* EOF or IO error */
		return nRead;
	}
	return n;
}
/*
 * Extract a single line from the buffered input.
 */
static sxi32 GetLine(io_private *pDev,ph7_int64 *pLen,const char **pzLine)
{
	const char *zIn,*zEnd,*zPtr;
	zIn = (const char *)SyBlobDataAt(&pDev->sBuffer,pDev->nOfft);
	zEnd = &zIn[SyBlobLength(&pDev->sBuffer)-pDev->nOfft];
	zPtr = zIn;
	while( zIn < zEnd ){
		if( zIn[0] == '\n' ){
			/* Line found */
			zIn++; /* Include the line ending as requested by the PHP specification */
			*pLen = (ph7_int64)(zIn-zPtr);
			*pzLine = zPtr;
			return SXRET_OK;
		}
		zIn++;
	}
	/* No line were found */
	return SXERR_NOTFOUND;
}
/*
 * Read a single line from the underlying IO stream device.
 */
static ph7_int64 StreamReadLine(io_private *pDev,const char **pzData,ph7_int64 nMaxLen)
{
	const ph7_io_stream *pStream = pDev->pStream;
	char zBuf[8192];
	ph7_int64 n;
	sxi32 rc;
	n = 0;
	if( pDev->nOfft >= SyBlobLength(&pDev->sBuffer) ){
		/* Reset the working buffer so that we avoid excessive memory allocation */
		SyBlobReset(&pDev->sBuffer);
		pDev->nOfft = 0;
	}
	if( SyBlobLength(&pDev->sBuffer) - pDev->nOfft > 0 ){
		/* Check if there is a line */
		rc = GetLine(pDev,&n,pzData);
		if( rc == SXRET_OK ){
			/* Got line,update the cursor  */
			pDev->nOfft += (sxu32)n;
			return n;
		}
	}
	/* Perform the read operation until a new line is extracted or length
	 * limit is reached.
	 */
	for(;;){
		n = pStream->xRead(pDev->pHandle,zBuf,(nMaxLen > 0 && nMaxLen < sizeof(zBuf)) ? nMaxLen : sizeof(zBuf));
		if( n < 1 ){
			/* EOF or IO error */
			break;
		}
		/* Append the data just read */
		SyBlobAppend(&pDev->sBuffer,zBuf,(sxu32)n);
		/* Try to extract a line */
		rc = GetLine(pDev,&n,pzData);
		if( rc == SXRET_OK ){
			/* Got one,return immediately */
			pDev->nOfft += (sxu32)n;
			return n;
		}
		if( nMaxLen > 0 && (SyBlobLength(&pDev->sBuffer) - pDev->nOfft >= nMaxLen) ){
			/* Read limit reached,return the available data */
			*pzData = (const char *)SyBlobDataAt(&pDev->sBuffer,pDev->nOfft);
			n = SyBlobLength(&pDev->sBuffer) - pDev->nOfft;
			/* Reset the working buffer */
			SyBlobReset(&pDev->sBuffer);
			pDev->nOfft = 0;
			return n;
		}
	}
	if( SyBlobLength(&pDev->sBuffer) - pDev->nOfft > 0 ){
		/* Read limit reached,return the available data */
		*pzData = (const char *)SyBlobDataAt(&pDev->sBuffer,pDev->nOfft);
		n = SyBlobLength(&pDev->sBuffer) - pDev->nOfft;
		/* Reset the working buffer */
		SyBlobReset(&pDev->sBuffer);
		pDev->nOfft = 0;
	}
	return n;
}
/*
 * Open an IO stream handle.
 * Notes on stream:
 * According to the PHP reference manual.
 * In its simplest definition, a stream is a resource object which exhibits streamable behavior.
 * That is, it can be read from or written to in a linear fashion, and may be able to fseek() 
 * to an arbitrary locations within the stream.
 * A wrapper is additional code which tells the stream how to handle specific protocols/encodings.
 * For example, the http wrapper knows how to translate a URL into an HTTP/1.0 request for a file
 * on a remote server.
 * A stream is referenced as: scheme://target
 *   scheme(string) - The name of the wrapper to be used. Examples include: file, http...
 *   If no wrapper is specified, the function default is used (typically file://).
 *   target - Depends on the wrapper used. For filesystem related streams this is typically a path
 *  and filename of the desired file. For network related streams this is typically a hostname, often
 *  with a path appended. 
 *
 * Note that PH7 IO streams looks like PHP streams but their implementation differ greately.
 * Please refer to the official documentation for a full discussion.
 * This function return a handle on success. Otherwise null.
 */
PH7_PRIVATE void * PH7_StreamOpenHandle(ph7_vm *pVm,const ph7_io_stream *pStream,const char *zFile,
	int iFlags,int use_include,ph7_value *pResource,int bPushInclude,int *pNew)
{
	void *pHandle = 0; /* cc warning */
	SyString sFile;
	int rc;
	if( pStream == 0 ){
		/* No such stream device */
		return 0;
	}
	SyStringInitFromBuf(&sFile,zFile,SyStrlen(zFile));
	if( use_include ){
		if(	sFile.zString[0] == '/' ||
#ifdef __WINNT__
			(sFile.nByte > 2 && sFile.zString[1] == ':' && (sFile.zString[2] == '\\' || sFile.zString[2] == '/') ) ||
#endif
			(sFile.nByte > 1 && sFile.zString[0] == '.' && sFile.zString[1] == '/') ||
			(sFile.nByte > 2 && sFile.zString[0] == '.' && sFile.zString[1] == '.' && sFile.zString[2] == '/') ){
				/*  Open the file directly */
				rc = pStream->xOpen(zFile,iFlags,pResource,&pHandle);
		}else{
			SyString *pPath;
			SyBlob sWorker;
#ifdef __WINNT__
			static const int c = '\\';
#else
			static const int c = '/';
#endif
			/* Init the path builder working buffer */
			SyBlobInit(&sWorker,&pVm->sAllocator);
			/* Build a path from the set of include path */
			SySetResetCursor(&pVm->aPaths);
			rc = SXERR_IO;
			while( SXRET_OK == SySetGetNextEntry(&pVm->aPaths,(void **)&pPath) ){
				/* Build full path */
				SyBlobFormat(&sWorker,"%z%c%z",pPath,c,&sFile);
				/* Append null terminator */
				if( SXRET_OK != SyBlobNullAppend(&sWorker) ){
					continue;
				}
				/* Try to open the file */
				rc = pStream->xOpen((const char *)SyBlobData(&sWorker),iFlags,pResource,&pHandle);
				if( rc == PH7_OK ){
					if( bPushInclude ){
						/* Mark as included */
						PH7_VmPushFilePath(pVm,(const char *)SyBlobData(&sWorker),SyBlobLength(&sWorker),FALSE,pNew);
					}
					break;
				}
				/* Reset the working buffer */
				SyBlobReset(&sWorker);
				/* Check the next path */
			}
			SyBlobRelease(&sWorker);
		}
		if( rc == PH7_OK ){
			if( bPushInclude ){
				/* Mark as included */
				PH7_VmPushFilePath(pVm,sFile.zString,sFile.nByte,FALSE,pNew);
			}
		}
	}else{
		/* Open the URI direcly */
		rc = pStream->xOpen(zFile,iFlags,pResource,&pHandle);
	}
	if( rc != PH7_OK ){
		/* IO error */
		return 0;
	}
	/* Return the file handle */
	return pHandle;
}
/*
 * Read the whole contents of an open IO stream handle [i.e local file/URL..]
 * Store the read data in the given BLOB (last argument).
 * The read operation is stopped when he hit the EOF or an IO error occurs.
 */
PH7_PRIVATE sxi32 PH7_StreamReadWholeFile(void *pHandle,const ph7_io_stream *pStream,SyBlob *pOut)
{
	ph7_int64 nRead;
	char zBuf[8192]; /* 8K */
	int rc;
	/* Perform the requested operation */
	for(;;){
		nRead = pStream->xRead(pHandle,zBuf,sizeof(zBuf));
		if( nRead < 1 ){
			/* EOF or IO error */
			break;
		}
		/* Append contents */
		rc = SyBlobAppend(pOut,zBuf,(sxu32)nRead);
		if( rc != SXRET_OK ){
			break;
		}
	}
	return SyBlobLength(pOut) > 0 ? SXRET_OK : -1;
}
/*
 * Close an open IO stream handle [i.e local file/URI..].
 */
PH7_PRIVATE void PH7_StreamCloseHandle(const ph7_io_stream *pStream,void *pHandle)
{
	if( pStream->xClose ){
		pStream->xClose(pHandle);
	}
}
/*
 * string fgetc(resource $handle)
 *  Gets a character from the given file pointer.
 * Parameters
 *  $handle
 *   The file pointer.
 * Return
 *  Returns a string containing a single character read from the file
 *  pointed to by handle. Returns FALSE on EOF. 
 * WARNING
 *  This operation is extremely slow.Avoid using it.
 */
static int PH7_builtin_fgetc(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int c,n;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	n = (int)StreamRead(pDev,(void *)&c,sizeof(char));
	/* IO result */
	if( n < 1 ){
		/* EOF or error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return the string holding the character */
		ph7_result_string(pCtx,(const char *)&c,sizeof(char));
	}
	return PH7_OK;	
}
/*
 * string fgets(resource $handle[,int64 $length ])
 *  Gets line from file pointer.
 * Parameters
 *  $handle
 *   The file pointer.
 * $length
 *  Reading ends when length - 1 bytes have been read, on a newline
 *  (which is included in the return value), or on EOF (whichever comes first).
 *  If no length is specified, it will keep reading from the stream until it reaches
 *  the end of the line. 
 * Return
 *  Returns a string of up to length - 1 bytes read from the file pointed to by handle.
 *  If there is no more data to read in the file pointer, then FALSE is returned.
 *  If an error occurs, FALSE is returned.
 */
static int PH7_builtin_fgets(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zLine;
	io_private *pDev;
	ph7_int64 n,nLen;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	nLen = -1;
	if( nArg > 1 ){
		/* Maximum data to read */
		nLen = ph7_value_to_int64(apArg[1]);
	}
	/* Perform the requested operation */
	n = StreamReadLine(pDev,&zLine,nLen);
	if( n < 1 ){
		/* EOF or IO error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return the freshly extracted line */
		ph7_result_string(pCtx,zLine,(int)n);
	}
	return PH7_OK;	
}
/*
 * string fread(resource $handle,int64 $length)
 *  Binary-safe file read.
 * Parameters
 *  $handle
 *   The file pointer.
 * $length
 *  Up to length number of bytes read.
 * Return
 *  The data readen on success or FALSE on failure. 
 */
static int PH7_builtin_fread(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	ph7_int64 nRead;
	void *pBuf;
	int nLen;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
        nLen = 4096;
	if( nArg > 1 ){
 	  nLen = ph7_value_to_int(apArg[1]);
	  if( nLen < 1 ){
		/* Invalid length,set a default length */
		nLen = 4096;
	  }
        }
	/* Allocate enough buffer */
	pBuf = ph7_context_alloc_chunk(pCtx,(unsigned int)nLen,FALSE,FALSE);
	if( pBuf == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");			
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nRead = StreamRead(pDev,pBuf,(ph7_int64)nLen);
	if( nRead < 1 ){
		/* Nothing read,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Make a copy of the data just read */
		ph7_result_string(pCtx,(const char *)pBuf,(int)nRead);
	}
	/* Release the buffer */
	ph7_context_free_chunk(pCtx,pBuf);
	return PH7_OK;	
}
/*
 * array fgetcsv(resource $handle [, int $length = 0 
 *         [,string $delimiter = ','[,string $enclosure = '"'[,string $escape='\\']]]])
 * Gets line from file pointer and parse for CSV fields.
 * Parameters
 * $handle
 *   The file pointer.
 * $length
 *  Reading ends when length - 1 bytes have been read, on a newline
 *  (which is included in the return value), or on EOF (whichever comes first).
 *  If no length is specified, it will keep reading from the stream until it reaches
 *  the end of the line. 
 * $delimiter
 *   Set the field delimiter (one character only).
 * $enclosure
 *   Set the field enclosure character (one character only).
 * $escape
 *   Set the escape character (one character only). Defaults as a backslash (\)
 * Return
 *  Returns a string of up to length - 1 bytes read from the file pointed to by handle.
 *  If there is no more data to read in the file pointer, then FALSE is returned.
 *  If an error occurs, FALSE is returned.
 */
static int PH7_builtin_fgetcsv(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zLine;
	io_private *pDev;
	ph7_int64 n,nLen;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	nLen = -1;
	if( nArg > 1 ){
		/* Maximum data to read */
		nLen = ph7_value_to_int64(apArg[1]);
	}
	/* Perform the requested operation */
	n = StreamReadLine(pDev,&zLine,nLen);
	if( n < 1 ){
		/* EOF or IO error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		ph7_value *pArray;
		int delim  = ',';   /* Delimiter */
		int encl   = '"' ;  /* Enclosure */
		int escape = '\\';  /* Escape character */
		if( nArg > 2 ){
			const char *zPtr;
			int i;
			if( ph7_value_is_string(apArg[2]) ){
				/* Extract the delimiter */
				zPtr = ph7_value_to_string(apArg[2],&i);
				if( i > 0 ){
					delim = zPtr[0];
				}
			}
			if( nArg > 3 ){
				if( ph7_value_is_string(apArg[3]) ){
					/* Extract the enclosure */
					zPtr = ph7_value_to_string(apArg[3],&i);
					if( i > 0 ){
						encl = zPtr[0];
					}
				}
				if( nArg > 4 ){
					if( ph7_value_is_string(apArg[4]) ){
						/* Extract the escape character */
						zPtr = ph7_value_to_string(apArg[4],&i);
						if( i > 0 ){
							escape = zPtr[0];
						}
					}
				}
			}
		}
		/* Create our array */
		pArray = ph7_context_new_array(pCtx);
		if( pArray == 0 ){
			ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			ph7_result_null(pCtx);
			return PH7_OK;
		}
		/* Parse the raw input */
		PH7_ProcessCsv(zLine,(int)n,delim,encl,escape,PH7_CsvConsumer,pArray);
		/* Return the freshly created array  */
		ph7_result_value(pCtx,pArray);
	}
	return PH7_OK;	
}
/*
 * string fgetss(resource $handle [,int $length [,string $allowable_tags ]])
 *  Gets line from file pointer and strip HTML tags.
 * Parameters
 * $handle
 *   The file pointer.
 * $length
 *  Reading ends when length - 1 bytes have been read, on a newline
 *  (which is included in the return value), or on EOF (whichever comes first).
 *  If no length is specified, it will keep reading from the stream until it reaches
 *  the end of the line. 
 * $allowable_tags
 *  You can use the optional second parameter to specify tags which should not be stripped. 
 * Return
 *  Returns a string of up to length - 1 bytes read from the file pointed to by 
 *  handle, with all HTML and PHP code stripped. If an error occurs, returns FALSE. 
 */
static int PH7_builtin_fgetss(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zLine;
	io_private *pDev;
	ph7_int64 n,nLen;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	nLen = -1;
	if( nArg > 1 ){
		/* Maximum data to read */
		nLen = ph7_value_to_int64(apArg[1]);
	}
	/* Perform the requested operation */
	n = StreamReadLine(pDev,&zLine,nLen);
	if( n < 1 ){
		/* EOF or IO error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		const char *zTaglist = 0;
		int nTaglen = 0;
		if( nArg > 2 && ph7_value_is_string(apArg[2]) ){
			/* Allowed tag */
			zTaglist = ph7_value_to_string(apArg[2],&nTaglen);
		}
		/* Process data just read */
		PH7_StripTagsFromString(pCtx,zLine,(int)n,zTaglist,nTaglen);
	}
	return PH7_OK;	
}
/*
 * string readdir(resource $dir_handle)
 *   Read entry from directory handle.
 * Parameter
 *  $dir_handle
 *   The directory handle resource previously opened with opendir().
 * Return
 *  Returns the filename on success or FALSE on failure.
 */
static int PH7_builtin_readdir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int rc;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xReadDir == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	ph7_result_bool(pCtx,0);
	/* Perform the requested operation */
	rc = pStream->xReadDir(pDev->pHandle,pCtx);
	if( rc != PH7_OK ){
		/* Return FALSE */
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * void rewinddir(resource $dir_handle)
 *   Rewind directory handle.
 * Parameter
 *  $dir_handle
 *   The directory handle resource previously opened with opendir().
 * Return
 *  FALSE on failure.
 */
static int PH7_builtin_rewinddir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xRewindDir == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pStream->xRewindDir(pDev->pHandle);
	return PH7_OK;
 }
/* Forward declaration */
static void InitIOPrivate(ph7_vm *pVm,const ph7_io_stream *pStream,io_private *pOut);
static void ReleaseIOPrivate(ph7_context *pCtx,io_private *pDev);
/*
 * void closedir(resource $dir_handle)
 *   Close directory handle.
 * Parameter
 *  $dir_handle
 *   The directory handle resource previously opened with opendir().
 * Return
 *  FALSE on failure.
 */
static int PH7_builtin_closedir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xCloseDir == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pStream->xCloseDir(pDev->pHandle);
	/* Release the private stucture */
	ReleaseIOPrivate(pCtx,pDev);
	PH7_MemObjRelease(apArg[0]);
	return PH7_OK;
 }
/*
 * resource opendir(string $path[,resource $context])
 *  Open directory handle.
 * Parameters
 * $path
 *   The directory path that is to be opened.
 * $context
 *   A context stream resource.
 * Return
 *  A directory handle resource on success,or FALSE on failure.
 */
static int PH7_builtin_opendir(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zPath;
	io_private *pDev;
	int iLen,rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a directory path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target path */
	zPath  = ph7_value_to_string(apArg[0],&iLen);
	/* Try to extract a stream */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zPath,iLen);
	if( pStream == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"No stream device is associated with the given path(%s)",zPath);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( pStream->xOpenDir == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device",
			ph7_function_name(pCtx),pStream->zName
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Allocate a new IO private instance */
	pDev = (io_private *)ph7_context_alloc_chunk(pCtx,sizeof(io_private),TRUE,FALSE);
	if( pDev == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Initialize the structure */
	InitIOPrivate(pCtx->pVm,pStream,pDev);
	/* Open the target directory */
	rc = pStream->xOpenDir(zPath,nArg > 1 ? apArg[1] : 0,&pDev->pHandle);
	if( rc != PH7_OK ){
		/* IO error,return FALSE */
		ReleaseIOPrivate(pCtx,pDev);
		ph7_result_bool(pCtx,0);
	}else{
		/* Return the handle as a resource */
		ph7_result_resource(pCtx,pDev);
	}
	return PH7_OK;
}
/*
 * int readfile(string $filename[,bool $use_include_path = false [,resource $context ]])
 *  Reads a file and writes it to the output buffer.
 * Parameters
 *  $filename
 *   The filename being read.
 *  $use_include_path
 *   You can use the optional second parameter and set it to
 *   TRUE, if you want to search for the file in the include_path, too.
 *  $context
 *   A context stream resource.
 * Return
 *  The number of bytes read from the file on success or FALSE on failure.
 */
static int PH7_builtin_readfile(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int use_include  = FALSE;
	const ph7_io_stream *pStream;
	ph7_int64 n,nRead;
	const char *zFile;
	char zBuf[8192];
	void *pHandle;
	int rc,nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		use_include = ph7_value_to_bool(apArg[1]);
	}
	/* Try to open the file in read-only mode */
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,
		use_include,nArg > 2 ? apArg[2] : 0,FALSE,0);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nRead = 0;
	for(;;){
		n = pStream->xRead(pHandle,zBuf,sizeof(zBuf));
		if( n < 1 ){
			/* EOF or IO error,break immediately */
			break;
		}
		/* Output data */
		rc = ph7_context_output(pCtx,zBuf,(int)n);
		if( rc == PH7_ABORT ){
			break;
		}
		/* Increment counter */
		nRead += n;
	}
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pHandle);
	/* Total number of bytes readen */
	ph7_result_int64(pCtx,nRead);
	return PH7_OK;
}
/*
 * string file_get_contents(string $filename[,bool $use_include_path = false 
 *         [, resource $context [, int $offset = -1 [, int $maxlen ]]]])
 *  Reads entire file into a string.
 * Parameters
 *  $filename
 *   The filename being read.
 *  $use_include_path
 *   You can use the optional second parameter and set it to
 *   TRUE, if you want to search for the file in the include_path, too.
 *  $context
 *   A context stream resource.
 *  $offset
 *   The offset where the reading starts on the original stream.
 *  $maxlen
 *    Maximum length of data read. The default is to read until end of file 
 *    is reached. Note that this parameter is applied to the stream processed by the filters.
 * Return
 *   The function returns the read data or FALSE on failure.
 */
static int PH7_builtin_file_get_contents(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	ph7_int64 n,nRead,nMaxlen;
	int use_include  = FALSE;
	const char *zFile;
	char zBuf[8192];
	void *pHandle;
	int nLen;
	
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	nMaxlen = -1;
	if( nArg > 1 ){
		use_include = ph7_value_to_bool(apArg[1]);
	}
	/* Try to open the file in read-only mode */
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,use_include,nArg > 2 ? apArg[2] : 0,FALSE,0);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 3 ){
		/* Extract the offset */
		n = ph7_value_to_int64(apArg[3]);
		if( n > 0 ){
			if( pStream->xSeek ){
				/* Seek to the desired offset */
				pStream->xSeek(pHandle,n,0/*SEEK_SET*/);
			}
		}
		if( nArg > 4 ){
			/* Maximum data to read */
			nMaxlen = ph7_value_to_int64(apArg[4]);
		}
	}
	/* Perform the requested operation */
	nRead = 0;
	for(;;){
		n = pStream->xRead(pHandle,zBuf,
			(nMaxlen > 0 && (nMaxlen < sizeof(zBuf))) ? nMaxlen : sizeof(zBuf));
		if( n < 1 ){
			/* EOF or IO error,break immediately */
			break;
		}
		/* Append data */
		ph7_result_string(pCtx,zBuf,(int)n);
		/* Increment read counter */
		nRead += n;
		if( nMaxlen > 0 && nRead >= nMaxlen ){
			/* Read limit reached */
			break;
		}
	}
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pHandle);
	/* Check if we have read something */
	if( ph7_context_result_buf_length(pCtx) < 1 ){
		/* Nothing read,return FALSE */
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int file_put_contents(string $filename,mixed $data[,int $flags = 0[,resource $context]])
 *  Write a string to a file.
 * Parameters
 *  $filename
 *  Path to the file where to write the data.
 * $data
 *  The data to write(Must be a string).
 * $flags
 *  The value of flags can be any combination of the following
 * flags, joined with the binary OR (|) operator.
 *   FILE_USE_INCLUDE_PATH 	Search for filename in the include directory. See include_path for more information.
 *   FILE_APPEND 	        If file filename already exists, append the data to the file instead of overwriting it.
 *   LOCK_EX 	            Acquire an exclusive lock on the file while proceeding to the writing.
 * context
 *  A context stream resource.
 * Return
 *  The function returns the number of bytes that were written to the file, or FALSE on failure. 
 */
static int PH7_builtin_file_put_contents(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int use_include  = FALSE;
	const ph7_io_stream *pStream;
	const char *zFile;
	const char *zData;
	int iOpenFlags;
	void *pHandle;
	int iFlags;
	int nLen;
	
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Data to write */
	zData = ph7_value_to_string(apArg[1],&nLen);
	if( nLen < 1 ){
		/* Nothing to write,return immediately */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Try to open the file in read-write mode */
	iOpenFlags = PH7_IO_OPEN_CREATE|PH7_IO_OPEN_RDWR|PH7_IO_OPEN_TRUNC;
	/* Extract the flags */
	iFlags = 0;
	if( nArg > 2 ){
		iFlags = ph7_value_to_int(apArg[2]);
		if( iFlags & 0x01 /*FILE_USE_INCLUDE_PATH*/){
			use_include = TRUE;
		}
		if( iFlags & 0x08 /* FILE_APPEND */){
			/* If the file already exists, append the data to the file
			 * instead of overwriting it.
			 */
			iOpenFlags &= ~PH7_IO_OPEN_TRUNC;
			/* Append mode */
			iOpenFlags |= PH7_IO_OPEN_APPEND;
		}
	}
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,iOpenFlags,use_include,
		nArg > 3 ? apArg[3] : 0,FALSE,FALSE);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( pStream->xWrite ){
		ph7_int64 n;
		if( (iFlags & 0x01/* LOCK_EX */) && pStream->xLock ){
			/* Try to acquire an exclusive lock */
			pStream->xLock(pHandle,1/* LOCK_EX */);
		}
		/* Perform the write operation */
		n = pStream->xWrite(pHandle,(const void *)zData,nLen);
		if( n < 1 ){
			/* IO error,return FALSE */
			ph7_result_bool(pCtx,0);
		}else{
			/* Total number of bytes written */
			ph7_result_int64(pCtx,n);
		}
	}else{
		/* Read-only stream */
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,
			"Read-only stream(%s): Cannot perform write operation",
			pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
	}
	/* Close the handle */
	PH7_StreamCloseHandle(pStream,pHandle);
	return PH7_OK;
}
/*
 * array file(string $filename[,int $flags = 0[,resource $context]])
 *  Reads entire file into an array.
 * Parameters
 *  $filename
 *   The filename being read.
 *  $flags
 *   The optional parameter flags can be one, or more, of the following constants:
 *   FILE_USE_INCLUDE_PATH
 *       Search for the file in the include_path. 
 *   FILE_IGNORE_NEW_LINES
 *       Do not add newline at the end of each array element 
 *   FILE_SKIP_EMPTY_LINES
 *       Skip empty lines 
 *  $context
 *   A context stream resource.
 * Return
 *   The function returns the read data or FALSE on failure.
 */
static int PH7_builtin_file(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFile,*zPtr,*zEnd,*zBuf;
	ph7_value *pArray,*pLine;
	const ph7_io_stream *pStream;
	int use_include = 0;
	io_private *pDev;
	ph7_int64 n;
	int iFlags;
	int nLen;
	
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Allocate a new IO private instance */
	pDev = (io_private *)ph7_context_alloc_chunk(pCtx,sizeof(io_private),TRUE,FALSE);
	if( pDev == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Initialize the structure */
	InitIOPrivate(pCtx->pVm,pStream,pDev);
	iFlags = 0;
	if( nArg > 1 ){
		iFlags = ph7_value_to_int(apArg[1]);
	}
	if( iFlags & 0x01 /*FILE_USE_INCLUDE_PATH*/ ){
		use_include = TRUE;
	}
	/* Create the array and the working value */
	pArray = ph7_context_new_array(pCtx);
	pLine = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pLine == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Try to open the file in read-only mode */
	pDev->pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,use_include,nArg > 2 ? apArg[2] : 0,FALSE,0);
	if( pDev->pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		/* Don't worry about freeing memory, everything will be released automatically
		 * as soon we return from this function.
		 */
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		/* Try to extract a line */
		n = StreamReadLine(pDev,&zBuf,-1);
		if( n < 1 ){
			/* EOF or IO error */
			break;
		}
		/* Reset the cursor */
		ph7_value_reset_string_cursor(pLine);
		/* Remove line ending if requested by the caller */
		zPtr = zBuf;
		zEnd = &zBuf[n];
		if( iFlags & 0x02 /* FILE_IGNORE_NEW_LINES */ ){
			/* Ignore trailig lines */
			while( zPtr < zEnd && (zEnd[-1] == '\n' 
#ifdef __WINNT__
				|| zEnd[-1] == '\r'
#endif
				)){
					n--;
					zEnd--;
			}
		}
		if( iFlags & 0x04 /* FILE_SKIP_EMPTY_LINES */ ){
			/* Ignore empty lines */
			while( zPtr < zEnd && (unsigned char)zPtr[0] < 0xc0 && SyisSpace(zPtr[0]) ){
				zPtr++;
			}
			if( zPtr >= zEnd ){
				/* Empty line */
				continue;
			}
		}
		ph7_value_string(pLine,zBuf,(int)(zEnd-zBuf));
		/* Insert line */
		ph7_array_add_elem(pArray,0/* Automatic index assign*/,pLine);
	}
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pDev->pHandle);
	/* Release the io_private instance */
	ReleaseIOPrivate(pCtx,pDev);
	/* Return the created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * bool copy(string $source,string $dest[,resource $context ] )
 *  Makes a copy of the file source to dest.
 * Parameters
 *  $source
 *   Path to the source file.
 *  $dest
 *   The destination path. If dest is a URL, the copy operation 
 *   may fail if the wrapper does not support overwriting of existing files. 
 *  $context
 *   A context stream resource.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_builtin_copy(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pSin,*pSout;	
	const char *zFile;
	char zBuf[8192];
	void *pIn,*pOut;
	ph7_int64 n;
	int nLen;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_string(apArg[1])){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a source and a destination path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the source name */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pSin = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pSin == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Try to open the source file in a read-only mode */
	pIn = PH7_StreamOpenHandle(pCtx->pVm,pSin,zFile,PH7_IO_OPEN_RDONLY,FALSE,nArg > 2 ? apArg[2] : 0,FALSE,0);
	if( pIn == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening source: '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the destination name */
	zFile = ph7_value_to_string(apArg[1],&nLen);
	/* Point to the target IO stream device */
	pSout = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pSout == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		PH7_StreamCloseHandle(pSin,pIn);
		return PH7_OK;
	}
	if( pSout->xWrite == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pSin->zName
			);
		ph7_result_bool(pCtx,0);
		PH7_StreamCloseHandle(pSin,pIn);
		return PH7_OK;
	}
	/* Try to open the destination file in a read-write mode */
	pOut = PH7_StreamOpenHandle(pCtx->pVm,pSout,zFile,
		PH7_IO_OPEN_CREATE|PH7_IO_OPEN_TRUNC|PH7_IO_OPEN_RDWR,FALSE,nArg > 2 ? apArg[2] : 0,FALSE,0);
	if( pOut == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening destination: '%s'",zFile);
		ph7_result_bool(pCtx,0);
		PH7_StreamCloseHandle(pSin,pIn);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		/* Read from source */
		n = pSin->xRead(pIn,zBuf,sizeof(zBuf));
		if( n < 1 ){
			/* EOF or IO error,break immediately */
			break;
		}
		/* Write to dest */
		n = pSout->xWrite(pOut,zBuf,n);
		if( n < 1 ){
			/* IO error,break immediately */
			break;
		}
	}
	/* Close the streams */
	PH7_StreamCloseHandle(pSin,pIn);
	PH7_StreamCloseHandle(pSout,pOut);
	/* Return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * array fstat(resource $handle)
 *  Gets information about a file using an open file pointer.
 * Parameters
 *  $handle
 *   The file pointer.
 * Return
 *  Returns an array with the statistics of the file or FALSE on failure.
 */
static int PH7_builtin_fstat(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pValue;
	const ph7_io_stream *pStream;
	io_private *pDev;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/* Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xStat == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Create the array and the working value */
	pArray = ph7_context_new_array(pCtx);
	pValue = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pValue == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pStream->xStat(pDev->pHandle,pArray,pValue);
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	/* Don't worry about freeing memory here,everything will be
	 * released automatically as soon we return from this function.
	 */
	return PH7_OK;
}
/*
 * int fwrite(resource $handle,string $string[,int $length])
 *  Writes the contents of string to the file stream pointed to by handle.
 * Parameters
 *  $handle
 *   The file pointer.
 *  $string
 *   The string that is to be written.
 *  $length
 *   If the length argument is given, writing will stop after length bytes have been written
 *   or the end of string is reached, whichever comes first. 
 * Return
 *  Returns the number of bytes written, or FALSE on error.
 */
static int PH7_builtin_fwrite(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zString;
	io_private *pDev;
	int nLen,n;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/* Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xWrite == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the data to write */
	zString = ph7_value_to_string(apArg[1],&nLen);
	if( nArg > 2 ){
		/* Maximum data length to write */
		n = ph7_value_to_int(apArg[2]);
		if( n >= 0 && n < nLen ){
			nLen = n;
		}
	}
	if( nLen < 1 ){
		/* Nothing to write */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	n = (int)pStream->xWrite(pDev->pHandle,(const void *)zString,nLen);
	if( n <  0 ){
		/* IO error,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* #Bytes written */
		ph7_result_int(pCtx,n);
	}
	return PH7_OK;
}
/*
 * bool flock(resource $handle,int $operation)
 *  Portable advisory file locking.
 * Parameters
 *  $handle
 *   The file pointer.
 *  $operation
 *   operation is one of the following:
 *      LOCK_SH to acquire a shared lock (reader).
 *      LOCK_EX to acquire an exclusive lock (writer).
 *      LOCK_UN to release a lock (shared or exclusive).
 * Return
 *  Returns TRUE on success or FALSE on failure.
 */
static int PH7_builtin_flock(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	int nLock;
	int rc;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xLock == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Requested lock operation */
	nLock = ph7_value_to_int(apArg[1]);
	/* Lock operation */
	rc = pStream->xLock(pDev->pHandle,nLock);
	/* IO result */
	ph7_result_bool(pCtx,rc == PH7_OK);
	return PH7_OK;
}
/*
 * int fpassthru(resource $handle)
 *  Output all remaining data on a file pointer.
 * Parameters
 *  $handle
 *   The file pointer. 
 * Return
 *  Total number of characters read from handle and passed through
 *  to the output on success or FALSE on failure.
 */
static int PH7_builtin_fpassthru(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	ph7_int64 n,nRead;
	char zBuf[8192];
	int rc;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	nRead = 0;
	for(;;){
		n = StreamRead(pDev,zBuf,sizeof(zBuf));
		if( n < 1 ){
			/* Error or EOF */
			break;
		}
		/* Increment the read counter */
		nRead += n;
		/* Output data */
		rc = ph7_context_output(pCtx,zBuf,(int)nRead /* FIXME: 64-bit issues */);
		if( rc == PH7_ABORT ){
			/* Consumer callback request an operation abort */
			break;
		}
	}
	/* Total number of bytes readen */
	ph7_result_int64(pCtx,nRead);
	return PH7_OK;
}
/* CSV reader/writer private data */
struct csv_data
{
	int delimiter;    /* Delimiter. Default ',' */
	int enclosure;    /* Enclosure. Default '"'*/
	io_private *pDev; /* Open stream handle */
	int iCount;       /* Counter */
};
/* 
 * The following callback is used by the fputcsv() function inorder to iterate
 * throw array entries and output CSV data based on the current key and it's
 * associated data.
 */
static int csv_write_callback(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	struct csv_data *pData = (struct csv_data *)pUserData;
	const char *zData;
	int nLen,c2;
	sxu32 n;
	/* Point to the raw data */
	zData = ph7_value_to_string(pValue,&nLen);
	if( nLen < 1 ){
		/* Nothing to write */
		return PH7_OK;
	}
	if( pData->iCount > 0 ){
		/* Write the delimiter */
		pData->pDev->pStream->xWrite(pData->pDev->pHandle,(const void *)&pData->delimiter,sizeof(char));
	}
	n = 1;
	c2 = 0;
	if( SyByteFind(zData,(sxu32)nLen,pData->delimiter,0) == SXRET_OK || 
		SyByteFind(zData,(sxu32)nLen,pData->enclosure,&n) == SXRET_OK ){
			c2 = 1;
			if( n == 0 ){
				c2 = 2;
			}
			/* Write the enclosure */
			pData->pDev->pStream->xWrite(pData->pDev->pHandle,(const void *)&pData->enclosure,sizeof(char));
			if( c2 > 1 ){
				pData->pDev->pStream->xWrite(pData->pDev->pHandle,(const void *)&pData->enclosure,sizeof(char));
			}
	}
	/* Write the data */
	if( pData->pDev->pStream->xWrite(pData->pDev->pHandle,(const void *)zData,(ph7_int64)nLen) < 1 ){
		SXUNUSED(pKey); /* cc warning */
		return PH7_ABORT;
	}
	if( c2 > 0 ){
		/* Write the enclosure */
		pData->pDev->pStream->xWrite(pData->pDev->pHandle,(const void *)&pData->enclosure,sizeof(char));
		if( c2 > 1 ){
			pData->pDev->pStream->xWrite(pData->pDev->pHandle,(const void *)&pData->enclosure,sizeof(char));
		}
	}
	pData->iCount++;
	return PH7_OK;
}
/*
 * int fputcsv(resource $handle,array $fields[,string $delimiter = ','[,string $enclosure = '"' ]])
 *  Format line as CSV and write to file pointer.
 * Parameters
 *  $handle
 *   Open file handle.
 * $fields
 *   An array of values.
 * $delimiter
 *   The optional delimiter parameter sets the field delimiter (one character only).
 * $enclosure
 *  The optional enclosure parameter sets the field enclosure (one character only).
 */
static int PH7_builtin_fputcsv(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	struct csv_data sCsv;
	io_private *pDev;
	char *zEol;
	int eolen;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) || !ph7_value_is_array(apArg[1]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Missing/Invalid arguments");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0  || pStream->xWrite == 0){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Set default csv separator */
	sCsv.delimiter = ',';
	sCsv.enclosure = '"';
	sCsv.pDev = pDev;
	sCsv.iCount = 0;
	if( nArg > 2 ){
		/* User delimiter */
		const char *z;
		int n;
		z = ph7_value_to_string(apArg[2],&n);
		if( n > 0 ){
			sCsv.delimiter = z[0];
		}
		if( nArg > 3 ){
			z = ph7_value_to_string(apArg[3],&n);
			if( n > 0 ){
				sCsv.enclosure = z[0];
			}
		}
	}
	/* Iterate throw array entries and write csv data */
	ph7_array_walk(apArg[1],csv_write_callback,&sCsv);
	/* Write a line ending */
#ifdef __WINNT__
	zEol = "\r\n";
	eolen = (int)sizeof("\r\n")-1;
#else
	/* Assume UNIX LF */
	zEol = "\n";
	eolen = (int)sizeof(char);
#endif
	pDev->pStream->xWrite(pDev->pHandle,(const void *)zEol,eolen);
	return PH7_OK;
}
/*
 * fprintf,vfprintf private data.
 * An instance of the following structure is passed to the formatted
 * input consumer callback defined below.
 */
typedef struct fprintf_data fprintf_data;
struct fprintf_data
{
	io_private *pIO;        /* IO stream */
	ph7_int64 nCount;       /* Total number of bytes written */
};
/*
 * Callback [i.e: Formatted input consumer] for the fprintf function.
 */
static int fprintfConsumer(ph7_context *pCtx,const char *zInput,int nLen,void *pUserData)
{
	fprintf_data *pFdata = (fprintf_data *)pUserData;
	ph7_int64 n;
	/* Write the formatted data */
	n = pFdata->pIO->pStream->xWrite(pFdata->pIO->pHandle,(const void *)zInput,nLen);
	if( n < 1 ){
		SXUNUSED(pCtx); /* cc warning */
		/* IO error,abort immediately */
		return SXERR_ABORT;
	}
	/* Increment counter */
	pFdata->nCount += n;
	return PH7_OK;
}
/*
 * int fprintf(resource $handle,string $format[,mixed $args [, mixed $... ]])
 *  Write a formatted string to a stream.
 * Parameters
 *  $handle
 *   The file pointer.
 *  $format
 *   String format (see sprintf()).
 * Return
 *  The length of the written string.
 */
static int PH7_builtin_fprintf(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	fprintf_data sFdata;
	const char *zFormat;
	io_private *pDev;
	int nLen;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) || !ph7_value_is_string(apArg[1]) ){
		/* Missing/Invalid arguments,return zero */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Invalid arguments");
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	if( pDev->pStream == 0  || pDev->pStream->xWrite == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device",
			ph7_function_name(pCtx),pDev->pStream ? pDev->pStream->zName : "null_stream"
			);
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the string format */
	zFormat = ph7_value_to_string(apArg[1],&nLen);
	if( nLen < 1 ){
		/* Empty string,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Prepare our private data */
	sFdata.nCount = 0;
	sFdata.pIO = pDev;
	/* Format the string */
	PH7_InputFormat(fprintfConsumer,pCtx,zFormat,nLen,nArg - 1,&apArg[1],(void *)&sFdata,FALSE);
	/* Return total number of bytes written */
	ph7_result_int64(pCtx,sFdata.nCount);
	return PH7_OK;
}
/*
 * int vfprintf(resource $handle,string $format,array $args)
 *  Write a formatted string to a stream.
 * Parameters
 *  $handle
 *   The file pointer.
 *  $format
 *   String format (see sprintf()).
 * $args
 *   User arguments.
 * Return
 *  The length of the written string.
 */
static int PH7_builtin_vfprintf(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	fprintf_data sFdata;
	const char *zFormat;
	ph7_hashmap *pMap;
	io_private *pDev;
	SySet sArg;
	int n,nLen;
	if( nArg < 3 || !ph7_value_is_resource(apArg[0]) || !ph7_value_is_string(apArg[1])  || !ph7_value_is_array(apArg[2]) ){
		/* Missing/Invalid arguments,return zero */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Invalid arguments");
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	if( pDev->pStream == 0  || pDev->pStream->xWrite == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device",
			ph7_function_name(pCtx),pDev->pStream ? pDev->pStream->zName : "null_stream"
			);
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the string format */
	zFormat = ph7_value_to_string(apArg[1],&nLen);
	if( nLen < 1 ){
		/* Empty string,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to hashmap */
	pMap = (ph7_hashmap *)apArg[2]->x.pOther;
	/* Extract arguments from the hashmap */
	n = PH7_HashmapValuesToSet(pMap,&sArg);
	/* Prepare our private data */
	sFdata.nCount = 0;
	sFdata.pIO = pDev;
	/* Format the string */
	PH7_InputFormat(fprintfConsumer,pCtx,zFormat,nLen,n,(ph7_value **)SySetBasePtr(&sArg),(void *)&sFdata,TRUE);
	/* Return total number of bytes written*/
	ph7_result_int64(pCtx,sFdata.nCount);
	SySetRelease(&sArg);
	return PH7_OK;
}
/*
 * Convert open modes (string passed to the fopen() function) [i.e: 'r','w+','a',...] into PH7 flags.
 * According to the PHP reference manual:
 *  The mode parameter specifies the type of access you require to the stream. It may be any of the following
 *   'r' 	Open for reading only; place the file pointer at the beginning of the file.
 *   'r+' 	Open for reading and writing; place the file pointer at the beginning of the file.
 *   'w' 	Open for writing only; place the file pointer at the beginning of the file and truncate the file
 *          to zero length. If the file does not exist, attempt to create it.
 *   'w+' 	Open for reading and writing; place the file pointer at the beginning of the file and truncate
 *              the file to zero length. If the file does not exist, attempt to create it.
 *   'a' 	Open for writing only; place the file pointer at the end of the file. If the file does not 
 *         exist, attempt to create it.
 *   'a+' 	Open for reading and writing; place the file pointer at the end of the file. If the file does 
 *          not exist, attempt to create it.
 *   'x' 	Create and open for writing only; place the file pointer at the beginning of the file. If the file
 *         already exists,
 *         the fopen() call will fail by returning FALSE and generating an error of level E_WARNING. If the file
 *         does not exist attempt to create it. This is equivalent to specifying O_EXCL|O_CREAT flags for
 *         the underlying open(2) system call.
 *   'x+' 	Create and open for reading and writing; otherwise it has the same behavior as 'x'.
 *   'c' 	Open the file for writing only. If the file does not exist, it is created. If it exists, it is neither truncated
 *          (as opposed to 'w'), nor the call to this function fails (as is the case with 'x'). The file pointer
 *          is positioned on the beginning of the file.
 *          This may be useful if it's desired to get an advisory lock (see flock()) before attempting to modify the file
 *          as using 'w' could truncate the file before the lock was obtained (if truncation is desired, ftruncate() can
 *          be used after the lock is requested).
 *   'c+' 	Open the file for reading and writing; otherwise it has the same behavior as 'c'. 
 */
static int StrModeToFlags(ph7_context *pCtx,const char *zMode,int nLen)
{
	const char *zEnd = &zMode[nLen];
	int iFlag = 0;
	int c;
	if( nLen < 1 ){
		/* Open in a read-only mode */
		return PH7_IO_OPEN_RDONLY;
	}
	c = zMode[0];
	if( c == 'r' || c == 'R' ){
		/* Read-only access */
		iFlag = PH7_IO_OPEN_RDONLY;
		zMode++; /* Advance */
		if( zMode < zEnd ){
			c = zMode[0];
			if( c == '+' || c == 'w' || c == 'W' ){
				/* Read+Write access */
				iFlag = PH7_IO_OPEN_RDWR;
			}
		}
	}else if( c == 'w' || c == 'W' ){
		/* Overwrite mode.
		 * If the file does not exists,try to create it
		 */
		iFlag = PH7_IO_OPEN_WRONLY|PH7_IO_OPEN_TRUNC|PH7_IO_OPEN_CREATE;
		zMode++; /* Advance */
		if( zMode < zEnd ){
			c = zMode[0];
			if( c == '+' || c == 'r' || c == 'R' ){
				/* Read+Write access */
				iFlag &= ~PH7_IO_OPEN_WRONLY;
				iFlag |= PH7_IO_OPEN_RDWR;
			}
		}
	}else if( c == 'a' || c == 'A' ){
		/* Append mode (place the file pointer at the end of the file).
		 * Create the file if it does not exists.
		 */
		iFlag = PH7_IO_OPEN_WRONLY|PH7_IO_OPEN_APPEND|PH7_IO_OPEN_CREATE;
		zMode++; /* Advance */
		if( zMode < zEnd ){
			c = zMode[0];
			if( c == '+' ){
				/* Read-Write access */
				iFlag &= ~PH7_IO_OPEN_WRONLY;
				iFlag |= PH7_IO_OPEN_RDWR;
			}
		}
	}else if( c == 'x' || c == 'X' ){
		/* Exclusive access.
		 * If the file already exists,return immediately with a failure code.
		 * Otherwise create a new file.
		 */
		iFlag = PH7_IO_OPEN_WRONLY|PH7_IO_OPEN_EXCL;
		zMode++; /* Advance */
		if( zMode < zEnd ){
			c = zMode[0];
			if( c == '+' || c == 'r' || c == 'R' ){
				/* Read-Write access */
				iFlag &= ~PH7_IO_OPEN_WRONLY;
				iFlag |= PH7_IO_OPEN_RDWR;
			}
		}
	}else if( c == 'c' || c == 'C' ){
		/* Overwrite mode.Create the file if it does not exists.*/
		iFlag = PH7_IO_OPEN_WRONLY|PH7_IO_OPEN_CREATE;
		zMode++; /* Advance */
		if( zMode < zEnd ){
			c = zMode[0];
			if( c == '+' ){
				/* Read-Write access */
				iFlag &= ~PH7_IO_OPEN_WRONLY;
				iFlag |= PH7_IO_OPEN_RDWR;
			}
		}
	}else{
		/* Invalid mode. Assume a read only open */
		ph7_context_throw_error(pCtx,PH7_CTX_NOTICE,"Invalid open mode,PH7 is assuming a Read-Only open");
		iFlag = PH7_IO_OPEN_RDONLY;
	}
	while( zMode < zEnd ){
		c = zMode[0];
		if( c == 'b' || c == 'B' ){
			iFlag &= ~PH7_IO_OPEN_TEXT;
			iFlag |= PH7_IO_OPEN_BINARY;
		}else if( c == 't' || c == 'T' ){
			iFlag &= ~PH7_IO_OPEN_BINARY;
			iFlag |= PH7_IO_OPEN_TEXT;
		}
		zMode++;
	}
	return iFlag;
}
/*
 * Initialize the IO private structure.
 */
static void InitIOPrivate(ph7_vm *pVm,const ph7_io_stream *pStream,io_private *pOut)
{
	pOut->pStream = pStream;
	SyBlobInit(&pOut->sBuffer,&pVm->sAllocator);
	pOut->nOfft = 0;
	/* Set the magic number */
	pOut->iMagic = IO_PRIVATE_MAGIC;
}
/*
 * Release the IO private structure.
 */
static void ReleaseIOPrivate(ph7_context *pCtx,io_private *pDev)
{
	SyBlobRelease(&pDev->sBuffer);
	pDev->iMagic = 0x2126; /* Invalid magic number so we can detetct misuse */
	/* Release the whole structure */
	ph7_context_free_chunk(pCtx,pDev);
}
/*
 * Reset the IO private structure.
 */
static void ResetIOPrivate(io_private *pDev)
{
	SyBlobReset(&pDev->sBuffer);
	pDev->nOfft = 0;
}
/* Forward declaration */
static int is_php_stream(const ph7_io_stream *pStream);
/*
 * resource fopen(string $filename,string $mode [,bool $use_include_path = false[,resource $context ]])
 *  Open a file,a URL or any other IO stream.
 * Parameters
 *  $filename
 *   If filename is of the form "scheme://...", it is assumed to be a URL and PHP will search
 *   for a protocol handler (also known as a wrapper) for that scheme. If no scheme is given
 *   then a regular file is assumed.
 *  $mode
 *   The mode parameter specifies the type of access you require to the stream
 *   See the block comment associated with the StrModeToFlags() for the supported 
 *   modes.
 *  $use_include_path
 *   You can use the optional second parameter and set it to
 *   TRUE, if you want to search for the file in the include_path, too.
 *  $context
 *   A context stream resource.
 * Return
 *  File handle on success or FALSE on failure.
 */
static int PH7_builtin_fopen(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zUri,*zMode;
	ph7_value *pResource;
	io_private *pDev;
	int iLen,imLen;
	int iOpenFlags;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path or URL");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the URI and the desired access mode */
	zUri  = ph7_value_to_string(apArg[0],&iLen);
	if( nArg > 1 ){
		zMode = ph7_value_to_string(apArg[1],&imLen);
	}else{
		/* Set a default read-only mode */
		zMode = "r";
		imLen = (int)sizeof(char);
	}
	/* Try to extract a stream */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zUri,iLen);
	if( pStream == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"No stream device is associated with the given URI(%s)",zUri);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Allocate a new IO private instance */
	pDev = (io_private *)ph7_context_alloc_chunk(pCtx,sizeof(io_private),TRUE,FALSE);
	if( pDev == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pResource = 0;
	if( nArg > 3 ){
		pResource = apArg[3];
	}else if( is_php_stream(pStream) ){
		/* TICKET 1433-80: The php:// stream need a ph7_value to access the underlying
		 * virtual machine.
		 */
		pResource = apArg[0];
	}
	/* Initialize the structure */
	InitIOPrivate(pCtx->pVm,pStream,pDev);
	/* Convert open mode to PH7 flags */
	iOpenFlags = StrModeToFlags(pCtx,zMode,imLen);
	/* Try to get a handle */
	pDev->pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zUri,iOpenFlags,
		nArg > 2 ? ph7_value_to_bool(apArg[2]) : FALSE,pResource,FALSE,0);
	if( pDev->pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zUri);
		ph7_result_bool(pCtx,0);
		ph7_context_free_chunk(pCtx,pDev);
		return PH7_OK;
	}
	/* All done,return the io_private instance as a resource */
	ph7_result_resource(pCtx,pDev);
	return PH7_OK;
}
/*
 * bool fclose(resource $handle)
 *  Closes an open file pointer
 * Parameters
 *  $handle
 *   The file pointer. 
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int PH7_builtin_fclose(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	io_private *pDev;
	ph7_vm *pVm;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract our private data */
	pDev = (io_private *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid io_private instance */
	if( IO_PRIVATE_INVALID(pDev) ){
		/*Expecting an IO handle */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting an IO handle");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target IO stream device */
	pStream = pDev->pStream;
	if( pStream == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_WARNING,
			"IO routine(%s) not implemented in the underlying stream(%s) device,PH7 is returning FALSE",
			ph7_function_name(pCtx),pStream ? pStream->zName : "null_stream"
			);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the VM that own this context */
	pVm = pCtx->pVm;
	/* TICKET 1433-62: Keep the STDIN/STDOUT/STDERR handles open */
	if( pDev != pVm->pStdin && pDev != pVm->pStdout && pDev != pVm->pStderr ){
		/* Perform the requested operation */
		PH7_StreamCloseHandle(pStream,pDev->pHandle);
		/* Release the IO private structure */
		ReleaseIOPrivate(pCtx,pDev);
		/* Invalidate the resource handle */
		ph7_value_release(apArg[0]);
	}
	/* Return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
#if !defined(PH7_DISABLE_HASH_FUNC)
/*
 * MD5/SHA1 digest consumer.
 */
static int vfsHashConsumer(const void *pData,unsigned int nLen,void *pUserData)
{
	/* Append hex chunk verbatim */
	ph7_result_string((ph7_context *)pUserData,(const char *)pData,(int)nLen);
	return SXRET_OK;
}
/*
 * string md5_file(string $uri[,bool $raw_output = false ])
 *  Calculates the md5 hash of a given file.
 * Parameters
 *  $uri
 *   Target URI (file(/path/to/something) or URL(http://www.symisc.net/))
 *  $raw_output
 *   When TRUE, returns the digest in raw binary format with a length of 16.
 * Return
 *  Return the MD5 digest on success or FALSE on failure.
 */
static int PH7_builtin_md5_file(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	unsigned char zDigest[16];
	int raw_output  = FALSE;
	const char *zFile;
	MD5Context sCtx;
	char zBuf[8192];
	void *pHandle;
	ph7_int64 n;
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		raw_output = ph7_value_to_bool(apArg[1]);
	}
	/* Try to open the file in read-only mode */
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,FALSE,0,FALSE,0);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Init the MD5 context */
	MD5Init(&sCtx);
	/* Perform the requested operation */ 
	for(;;){
		n = pStream->xRead(pHandle,zBuf,sizeof(zBuf));
		if( n < 1 ){
			/* EOF or IO error,break immediately */
			break;
		}
		MD5Update(&sCtx,(const unsigned char *)zBuf,(unsigned int)n);
	}
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pHandle);
	/* Extract the digest */
	MD5Final(zDigest,&sCtx);
	if( raw_output ){
		/* Output raw digest */
		ph7_result_string(pCtx,(const char *)zDigest,sizeof(zDigest));
	}else{
		/* Perform a binary to hex conversion */
		SyBinToHexConsumer((const void *)zDigest,sizeof(zDigest),vfsHashConsumer,pCtx);
	}
	return PH7_OK;
}
/*
 * string sha1_file(string $uri[,bool $raw_output = false ])
 *  Calculates the SHA1 hash of a given file.
 * Parameters
 *  $uri
 *   Target URI (file(/path/to/something) or URL(http://www.symisc.net/))
 *  $raw_output
 *   When TRUE, returns the digest in raw binary format with a length of 20.
 * Return
 *  Return the SHA1 digest on success or FALSE on failure.
 */
static int PH7_builtin_sha1_file(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	unsigned char zDigest[20];
	int raw_output  = FALSE;
	const char *zFile;
	SHA1Context sCtx;
	char zBuf[8192];
	void *pHandle;
	ph7_int64 n;
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 1 ){
		raw_output = ph7_value_to_bool(apArg[1]);
	}
	/* Try to open the file in read-only mode */
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,FALSE,0,FALSE,0);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Init the SHA1 context */
	SHA1Init(&sCtx);
	/* Perform the requested operation */ 
	for(;;){
		n = pStream->xRead(pHandle,zBuf,sizeof(zBuf));
		if( n < 1 ){
			/* EOF or IO error,break immediately */
			break;
		}
		SHA1Update(&sCtx,(const unsigned char *)zBuf,(unsigned int)n);
	}
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pHandle);
	/* Extract the digest */
	SHA1Final(&sCtx,zDigest);
	if( raw_output ){
		/* Output raw digest */
		ph7_result_string(pCtx,(const char *)zDigest,sizeof(zDigest));
	}else{
		/* Perform a binary to hex conversion */
		SyBinToHexConsumer((const void *)zDigest,sizeof(zDigest),vfsHashConsumer,pCtx);
	}
	return PH7_OK;
}
#endif /* PH7_DISABLE_HASH_FUNC */
/*
 * array parse_ini_file(string $filename[, bool $process_sections = false [, int $scanner_mode = INI_SCANNER_NORMAL ]] )
 *  Parse a configuration file.
 * Parameters
 * $filename
 *  The filename of the ini file being parsed.
 * $process_sections
 *  By setting the process_sections parameter to TRUE, you get a multidimensional array
 *  with the section names and settings included.
 *  The default for process_sections is FALSE.
 * $scanner_mode
 *  Can either be INI_SCANNER_NORMAL (default) or INI_SCANNER_RAW.
 *  If INI_SCANNER_RAW is supplied, then option values will not be parsed.
 * Return
 *  The settings are returned as an associative array on success.
 *  Otherwise is returned.
 */
static int PH7_builtin_parse_ini_file(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	const char *zFile;
	SyBlob sContents;
	void *pHandle;
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Try to open the file in read-only mode */
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,FALSE,0,FALSE,0);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	SyBlobInit(&sContents,&pCtx->pVm->sAllocator);
	/* Read the whole file */
	PH7_StreamReadWholeFile(pHandle,pStream,&sContents);
	if( SyBlobLength(&sContents) < 1 ){
		/* Empty buffer,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Process the raw INI buffer */
		PH7_ParseIniString(pCtx,(const char *)SyBlobData(&sContents),SyBlobLength(&sContents),
			nArg > 1 ? ph7_value_to_bool(apArg[1]) : 0);
	}
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pHandle);
	/* Release the working buffer */
	SyBlobRelease(&sContents);
	return PH7_OK;
}
/*
 * Section:
 *    ZIP archive processing.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
typedef struct zip_raw_data zip_raw_data;
struct zip_raw_data
{
	int iType;         /* Where the raw data is stored */
	union raw_data{
		struct mmap_data{
			void *pMap;          /* Memory mapped data */
			ph7_int64 nSize;     /* Map size */
			const ph7_vfs *pVfs; /* Underlying vfs */
		}mmap;
		SyBlob sBlob;  /* Memory buffer */
	}raw;
};
#define ZIP_RAW_DATA_MMAPED 1 /* Memory mapped ZIP raw data */
#define ZIP_RAW_DATA_MEMBUF 2 /* ZIP raw data stored in a dynamically
                               * allocated memory chunk.
							   */
 /*
  * mixed zip_open(string $filename)
  *  Opens a new zip archive for reading.
  * Parameters
  *  $filename
  *   The file name of the ZIP archive to open.
  * Return
  *  A resource handle for later use with zip_read() and zip_close() or FALSE on failure.
  */
static int PH7_builtin_zip_open(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const ph7_io_stream *pStream;
	SyArchive *pArchive;
	zip_raw_data *pRaw;
	const char *zFile;
	SyBlob *pContents;
	void *pHandle;
	int nLen;
	sxi32 rc;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Expecting a file path");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the file path */
	zFile = ph7_value_to_string(apArg[0],&nLen);
	/* Point to the target IO stream device */
	pStream = PH7_VmGetStreamDevice(pCtx->pVm,&zFile,nLen);
	if( pStream == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"No such stream device,PH7 is returning FALSE");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Create an in-memory archive */
	pArchive = (SyArchive *)ph7_context_alloc_chunk(pCtx,sizeof(SyArchive)+sizeof(zip_raw_data),TRUE,FALSE);
	if( pArchive == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"PH7 is running out of memory");
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pRaw = (zip_raw_data *)&pArchive[1];
	/* Initialize the archive */
	SyArchiveInit(pArchive,&pCtx->pVm->sAllocator,0,0);
	/* Extract the default stream */
	if( pStream == pCtx->pVm->pDefStream /* file:// stream*/){
		const ph7_vfs *pVfs;
		/* Try to get a memory view of the whole file since ZIP files
		 * tends to be very big this days,this is a huge performance win.
		 */
		pVfs = PH7_ExportBuiltinVfs();
		if( pVfs && pVfs->xMmap ){
			rc = pVfs->xMmap(zFile,&pRaw->raw.mmap.pMap,&pRaw->raw.mmap.nSize);
			if( rc == PH7_OK ){
				/* Nice,Extract the whole archive */
				rc = SyZipExtractFromBuf(pArchive,(const char *)pRaw->raw.mmap.pMap,(sxu32)pRaw->raw.mmap.nSize);
				if( rc != SXRET_OK ){
					if( pVfs->xUnmap ){
						pVfs->xUnmap(pRaw->raw.mmap.pMap,pRaw->raw.mmap.nSize);
					}
					/* Release the allocated chunk */
					ph7_context_free_chunk(pCtx,pArchive);
					/* Something goes wrong with this ZIP archive,return FALSE */
					ph7_result_bool(pCtx,0);
					return PH7_OK;
				}
				/* Archive successfully opened */
				pRaw->iType = ZIP_RAW_DATA_MMAPED;
				pRaw->raw.mmap.pVfs = pVfs;
				goto success;
			}
		}
		/* FALL THROUGH */
	}
	/* Try to open the file in read-only mode */
	pHandle = PH7_StreamOpenHandle(pCtx->pVm,pStream,zFile,PH7_IO_OPEN_RDONLY,FALSE,0,FALSE,0);
	if( pHandle == 0 ){
		ph7_context_throw_error_format(pCtx,PH7_CTX_ERR,"IO error while opening '%s'",zFile);
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pContents = &pRaw->raw.sBlob;
	SyBlobInit(pContents,&pCtx->pVm->sAllocator);
	/* Read the whole file */
	PH7_StreamReadWholeFile(pHandle,pStream,pContents);
	/* Assume an invalid ZIP file */
	rc = SXERR_INVALID;
	if( SyBlobLength(pContents) > 0 ){
		/* Extract archive entries */
		rc = SyZipExtractFromBuf(pArchive,(const char *)SyBlobData(pContents),SyBlobLength(pContents));
	}
	pRaw->iType = ZIP_RAW_DATA_MEMBUF;
	/* Close the stream */
	PH7_StreamCloseHandle(pStream,pHandle);
	if( rc != SXRET_OK ){
		/* Release the working buffer */
		SyBlobRelease(pContents);
		/* Release the allocated chunk */
		ph7_context_free_chunk(pCtx,pArchive);
		/* Something goes wrong with this ZIP archive,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
success:
	/* Reset the loop cursor */
	SyArchiveResetLoopCursor(pArchive);
	/* Return the in-memory archive as a resource handle */
	ph7_result_resource(pCtx,pArchive);
	return PH7_OK;
}
/*
  * void zip_close(resource $zip)
  *  Close an in-memory ZIP archive.
  * Parameters
  *  $zip
  *   A ZIP file previously opened with zip_open().
  * Return
  *  null.
  */
static int PH7_builtin_zip_close(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchive *pArchive;
	zip_raw_data *pRaw;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive");
		return PH7_OK;
	}
	/* Point to the in-memory archive */
	pArchive = (SyArchive *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid ZIP archive */
	if( SXARCH_INVALID(pArchive) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive");
		return PH7_OK;
	}
	/* Release the archive */
	SyArchiveRelease(pArchive);
	pRaw = (zip_raw_data *)&pArchive[1];
	if( pRaw->iType == ZIP_RAW_DATA_MEMBUF ){
		SyBlobRelease(&pRaw->raw.sBlob);
	}else{
		const ph7_vfs *pVfs = pRaw->raw.mmap.pVfs;
		if( pVfs->xUnmap ){
			/* Unmap the memory view */
			pVfs->xUnmap(pRaw->raw.mmap.pMap,pRaw->raw.mmap.nSize);
		}
	}
	/* Release the memory chunk */
	ph7_context_free_chunk(pCtx,pArchive);
	return PH7_OK;
}
/*
  * mixed zip_read(resource $zip)
  *  Reads the next entry from an in-memory ZIP archive.
  * Parameters
  *  $zip
  *   A ZIP file previously opened with zip_open().
  * Return
  *  A directory entry resource for later use with the zip_entry_... functions
  *  or FALSE if there are no more entries to read, or an error code if an error occurred.
  */
static int PH7_builtin_zip_read(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pNext = 0; /* cc warning */
	SyArchive *pArchive;
	sxi32 rc;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the in-memory archive */
	pArchive = (SyArchive *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid ZIP archive */
	if( SXARCH_INVALID(pArchive) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the next entry */
	rc = SyArchiveGetNextEntry(pArchive,&pNext);
	if( rc != SXRET_OK ){
		/* No more entries in the central directory,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return as a resource handle */
		ph7_result_resource(pCtx,pNext);
		/* Point to the ZIP raw data */
		pNext->pUserData = (void *)&pArchive[1];
	}
	return PH7_OK;
}
/*
  * bool zip_entry_open(resource $zip,resource $zip_entry[,string $mode ])
  *  Open a directory entry for reading
  * Parameters
  *  $zip
  *   A ZIP file previously opened with zip_open().
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * $mode
  *   Not used
  * Return
  *  A directory entry resource for later use with the zip_entry_... functions
  *  or FALSE if there are no more entries to read, or an error code if an error occurred.
  */
static int PH7_builtin_zip_entry_open(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	SyArchive *pArchive;
	if( nArg < 2 || !ph7_value_is_resource(apArg[0]) || !ph7_value_is_resource(apArg[1]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the in-memory archive */
	pArchive = (SyArchive *)ph7_value_to_resource(apArg[0]);
	/* Make sure we are dealing with a valid ZIP archive */
	if( SXARCH_INVALID(pArchive) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[1]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* All done. Actually this function is a no-op,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
  * bool zip_entry_close(resource $zip_entry)
  *  Close a directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * Return
  *  Returns TRUE on success or FALSE on failure.
  */
static int PH7_builtin_zip_entry_close(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Reset the read cursor */
	pEntry->nReadCount = 0;
	/*All done. Actually this function is a no-op,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
  * string zip_entry_name(resource $zip_entry)
  *  Retrieve the name of a directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * Return
  *  The name of the directory entry.
  */
static int PH7_builtin_zip_entry_name(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	SyString *pName;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Return entry name */
	pName = &pEntry->sFileName;
	ph7_result_string(pCtx,pName->zString,(int)pName->nByte);
	return PH7_OK;
}
/*
  * int64 zip_entry_filesize(resource $zip_entry)
  *  Retrieve the actual file size of a directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * Return
  *  The size of the directory entry.
  */
static int PH7_builtin_zip_entry_filesize(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Return entry size */
	ph7_result_int64(pCtx,(ph7_int64)pEntry->nByte);
	return PH7_OK;
}
/*
  * int64 zip_entry_compressedsize(resource $zip_entry)
  *  Retrieve the compressed size of a directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * Return
  *  The compressed size.
  */
static int PH7_builtin_zip_entry_compressedsize(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Return entry compressed size */
	ph7_result_int64(pCtx,(ph7_int64)pEntry->nByteCompr);
	return PH7_OK;
}
/*
  * string zip_entry_read(resource $zip_entry[,int $length])
  *  Reads from an open directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  *  $length
  *   The number of bytes to return. If not specified, this function
  *   will attempt to read 1024 bytes.
  * Return
  *  Returns the data read, or FALSE if the end of the file is reached.
  */
static int PH7_builtin_zip_entry_read(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	zip_raw_data *pRaw;
	const char *zData;
	int iLength;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	zData = 0;
	if( pEntry->nReadCount >= pEntry->nByteCompr ){
		/* No more data to read,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Set a default read length */
	iLength = 1024;
	if( nArg > 1 ){
		iLength = ph7_value_to_int(apArg[1]);
		if( iLength < 1 ){
			iLength = 1024;
		}
	}
	if( (sxu32)iLength > pEntry->nByteCompr - pEntry->nReadCount ){
		iLength = (int)(pEntry->nByteCompr - pEntry->nReadCount);
	}
	/* Return the entry contents */
	pRaw = (zip_raw_data *)pEntry->pUserData;
	if( pRaw->iType == ZIP_RAW_DATA_MEMBUF ){
		zData = (const char *)SyBlobDataAt(&pRaw->raw.sBlob,(pEntry->nOfft+pEntry->nReadCount));
	}else{
		const char *zMap = (const char *)pRaw->raw.mmap.pMap;
		/* Memory mmaped chunk */
		zData = &zMap[pEntry->nOfft+pEntry->nReadCount];
	}
	/* Increment the read counter */
	pEntry->nReadCount += iLength;
	/* Return the raw data */
	ph7_result_string(pCtx,zData,iLength);
	return PH7_OK;
}
/*
  * bool zip_entry_reset_read_cursor(resource $zip_entry)
  *  Reset the read cursor of an open directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * Return
  *  TRUE on success,FALSE on failure.
  * Note that this is a symisc eXtension.
  */
static int PH7_builtin_zip_entry_reset_read_cursor(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Reset the cursor */
	pEntry->nReadCount = 0;
	/* Return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
  * string zip_entry_compressionmethod(resource $zip_entry)
  *  Retrieve the compression method of a directory entry.
  * Parameters
  *  $zip_entry
  *   A directory entry returned by zip_read().
  * Return
  *  The compression method on success or FALSE on failure.
  */
static int PH7_builtin_zip_entry_compressionmethod(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyArchiveEntry *pEntry;
	if( nArg < 1 || !ph7_value_is_resource(apArg[0]) ){
		/* Missing/Invalid arguments */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid ZIP archive entry */
	pEntry = (SyArchiveEntry *)ph7_value_to_resource(apArg[0]);
	if( SXARCH_ENTRY_INVALID(pEntry) ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"Expecting a ZIP archive entry");
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	switch(pEntry->nComprMeth){
	case 0:
		/* No compression;entry is stored */
		ph7_result_string(pCtx,"stored",(int)sizeof("stored")-1);
		break;
	case 8:
		/* Entry is deflated (Default compression algorithm)  */
		ph7_result_string(pCtx,"deflate",(int)sizeof("deflate")-1);
		break;
		/* Exotic compression algorithms */ 
	case 1:
		ph7_result_string(pCtx,"shrunk",(int)sizeof("shrunk")-1);
		break;
	case 2:
	case 3:
	case 4:
	case 5:
		/* Entry is reduced */
		ph7_result_string(pCtx,"reduced",(int)sizeof("reduced")-1);
		break;
	case 6:
		/* Entry is imploded */
		ph7_result_string(pCtx,"implode",(int)sizeof("implode")-1);
		break;
	default:
		ph7_result_string(pCtx,"unknown",(int)sizeof("unknown")-1);
		break;
	}
	return PH7_OK;
}
#endif /* #ifndef PH7_DISABLE_BUILTIN_FUNC*/
/* NULL VFS [i.e: a no-op VFS]*/
static const ph7_vfs null_vfs = {
	"null_vfs",
	PH7_VFS_VERSION,
	0, /* int (*xChdir)(const char *) */
	0, /* int (*xChroot)(const char *); */
	0, /* int (*xGetcwd)(ph7_context *) */
	0, /* int (*xMkdir)(const char *,int,int) */
	0, /* int (*xRmdir)(const char *) */ 
	0, /* int (*xIsdir)(const char *) */
	0, /* int (*xRename)(const char *,const char *) */
	0, /*int (*xRealpath)(const char *,ph7_context *)*/
	0, /* int (*xSleep)(unsigned int) */
	0, /* int (*xUnlink)(const char *) */
	0, /* int (*xFileExists)(const char *) */
	0, /*int (*xChmod)(const char *,int)*/
	0, /*int (*xChown)(const char *,const char *)*/
	0, /*int (*xChgrp)(const char *,const char *)*/
	0, /* ph7_int64 (*xFreeSpace)(const char *) */
	0, /* ph7_int64 (*xTotalSpace)(const char *) */
	0, /* ph7_int64 (*xFileSize)(const char *) */
	0, /* ph7_int64 (*xFileAtime)(const char *) */
	0, /* ph7_int64 (*xFileMtime)(const char *) */
	0, /* ph7_int64 (*xFileCtime)(const char *) */
	0, /* int (*xStat)(const char *,ph7_value *,ph7_value *) */
	0, /* int (*xlStat)(const char *,ph7_value *,ph7_value *) */
	0, /* int (*xIsfile)(const char *) */
	0, /* int (*xIslink)(const char *) */
	0, /* int (*xReadable)(const char *) */
	0, /* int (*xWritable)(const char *) */
	0, /* int (*xExecutable)(const char *) */
	0, /* int (*xFiletype)(const char *,ph7_context *) */
	0, /* int (*xGetenv)(const char *,ph7_context *) */
	0, /* int (*xSetenv)(const char *,const char *) */ 
	0, /* int (*xTouch)(const char *,ph7_int64,ph7_int64) */
	0, /* int (*xMmap)(const char *,void **,ph7_int64 *) */
	0, /* void (*xUnmap)(void *,ph7_int64);  */
	0, /* int (*xLink)(const char *,const char *,int) */
	0, /* int (*xUmask)(int) */
	0, /* void (*xTempDir)(ph7_context *) */
	0, /* unsigned int (*xProcessId)(void) */
	0, /* int (*xUid)(void) */
	0, /* int (*xGid)(void) */
	0, /* void (*xUsername)(ph7_context *) */
	0  /* int (*xExec)(const char *,ph7_context *) */
};
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_DISK_IO
#ifdef __WINNT__
/*
 * Windows VFS implementation for the PH7 engine.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/* What follows here is code that is specific to windows systems. */
#include <Windows.h>
/*
** Convert a UTF-8 string to microsoft unicode (UTF-16?).
**
** Space to hold the returned string is obtained from HeapAlloc().
** Taken from the sqlite3 source tree
** status: Public Domain
*/
static WCHAR *utf8ToUnicode(const char *zFilename){
  int nChar;
  WCHAR *zWideFilename;

  nChar = MultiByteToWideChar(CP_UTF8, 0, zFilename, -1, 0, 0);
  zWideFilename = (WCHAR *)HeapAlloc(GetProcessHeap(),0,nChar*sizeof(zWideFilename[0]));
  if( zWideFilename == 0 ){
 	return 0;
  } 
  nChar = MultiByteToWideChar(CP_UTF8, 0, zFilename, -1, zWideFilename, nChar);
  if( nChar==0 ){
    HeapFree(GetProcessHeap(),0,zWideFilename);
    return 0;
  }
  return zWideFilename;
}
/*
** Convert a UTF-8 filename into whatever form the underlying
** operating system wants filenames in.Space to hold the result
** is obtained from HeapAlloc() and must be freed by the calling
** function.
** Taken from the sqlite3 source tree
** status: Public Domain
*/
static void *convertUtf8Filename(const char *zFilename){
  void *zConverted;
  zConverted = utf8ToUnicode(zFilename);
  return zConverted;
}
/*
** Convert microsoft unicode to UTF-8.  Space to hold the returned string is
** obtained from HeapAlloc().
** Taken from the sqlite3 source tree
** status: Public Domain
*/
static char *unicodeToUtf8(const WCHAR *zWideFilename){
  char *zFilename;
  int nByte;

  nByte = WideCharToMultiByte(CP_UTF8, 0, zWideFilename, -1, 0, 0, 0, 0);
  zFilename = (char *)HeapAlloc(GetProcessHeap(),0,nByte);
  if( zFilename == 0 ){
  	return 0;
  }
  nByte = WideCharToMultiByte(CP_UTF8, 0, zWideFilename, -1, zFilename, nByte,0, 0);
  if( nByte == 0 ){
    HeapFree(GetProcessHeap(),0,zFilename);
    return 0;
  }
  return zFilename;
}
/* int (*xchdir)(const char *) */
static int WinVfs_chdir(const char *zPath)
{
	void * pConverted;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	rc = SetCurrentDirectoryW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	return rc ? PH7_OK : -1;
}
/* int (*xGetcwd)(ph7_context *) */
static int WinVfs_getcwd(ph7_context *pCtx)
{
	WCHAR zDir[2048];
	char *zConverted;
	DWORD rc;
	/* Get the current directory */
	rc = GetCurrentDirectoryW(sizeof(zDir),zDir);
	if( rc < 1 ){
		return -1;
	}
	zConverted = unicodeToUtf8(zDir);
	if( zConverted == 0 ){
		return -1;
	}
	ph7_result_string(pCtx,zConverted,-1/*Compute length automatically*/); /* Will make it's own copy */
	HeapFree(GetProcessHeap(),0,zConverted);
	return PH7_OK;
}
/* int (*xMkdir)(const char *,int,int) */
static int WinVfs_mkdir(const char *zPath,int mode,int recursive)
{
	void * pConverted;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	mode= 0; /* MSVC warning */
	recursive = 0;
	rc = CreateDirectoryW((LPCWSTR)pConverted,0);
	HeapFree(GetProcessHeap(),0,pConverted);
	return rc ? PH7_OK : -1;
}
/* int (*xRmdir)(const char *) */
static int WinVfs_rmdir(const char *zPath)
{
	void * pConverted;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	rc = RemoveDirectoryW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	return rc ? PH7_OK : -1;
}
/* int (*xIsdir)(const char *) */
static int WinVfs_isdir(const char *zPath)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		return -1;
	}
	return (dwAttr & FILE_ATTRIBUTE_DIRECTORY) ? PH7_OK : -1;
}
/* int (*xRename)(const char *,const char *) */
static int WinVfs_Rename(const char *zOld,const char *zNew)
{
	void *pOld,*pNew;
	BOOL rc = 0;
	pOld = convertUtf8Filename(zOld);
	if( pOld == 0 ){
		return -1;
	}
	pNew = convertUtf8Filename(zNew);
	if( pNew  ){
		rc = MoveFileW((LPCWSTR)pOld,(LPCWSTR)pNew);
	}
	HeapFree(GetProcessHeap(),0,pOld);
	if( pNew ){
		HeapFree(GetProcessHeap(),0,pNew);
	}
	return rc ? PH7_OK : - 1;
}
/* int (*xRealpath)(const char *,ph7_context *) */
static int WinVfs_Realpath(const char *zPath,ph7_context *pCtx)
{
	WCHAR zTemp[2048];
	void *pPath;
	char *zReal;
	DWORD n;
	pPath = convertUtf8Filename(zPath);
	if( pPath == 0 ){
		return -1;
	}
	n = GetFullPathNameW((LPCWSTR)pPath,0,0,0);
	if( n > 0 ){
		if( n >= sizeof(zTemp) ){
			n = sizeof(zTemp) - 1;
		}
		GetFullPathNameW((LPCWSTR)pPath,n,zTemp,0);
	}
	HeapFree(GetProcessHeap(),0,pPath);
	if( !n ){
		return -1;
	}
	zReal = unicodeToUtf8(zTemp);
	if( zReal == 0 ){
		return -1;
	}
	ph7_result_string(pCtx,zReal,-1); /* Will make it's own copy */
	HeapFree(GetProcessHeap(),0,zReal);
	return PH7_OK;
}
/* int (*xSleep)(unsigned int) */
static int WinVfs_Sleep(unsigned int uSec)
{
	Sleep(uSec/1000/*uSec per Millisec */);
	return PH7_OK;
}
/* int (*xUnlink)(const char *) */
static int WinVfs_unlink(const char *zPath)
{
	void * pConverted;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	rc = DeleteFileW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	return rc ? PH7_OK : - 1;
}
/* ph7_int64 (*xFreeSpace)(const char *) */
static ph7_int64 WinVfs_DiskFreeSpace(const char *zPath)
{
#ifdef _WIN32_WCE
	/* GetDiskFreeSpace is not supported under WINCE */
	SXUNUSED(zPath);
	return 0;
#else
	DWORD dwSectPerClust,dwBytesPerSect,dwFreeClusters,dwTotalClusters;
	void * pConverted;
	WCHAR *p;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return 0;
	}
	p = (WCHAR *)pConverted;
	for(;*p;p++){
		if( *p == '\\' || *p == '/'){
			*p = '\0';
			break;
		}
	}
	rc = GetDiskFreeSpaceW((LPCWSTR)pConverted,&dwSectPerClust,&dwBytesPerSect,&dwFreeClusters,&dwTotalClusters);
	if( !rc ){
		return 0;
	}
	return (ph7_int64)dwFreeClusters * dwSectPerClust * dwBytesPerSect;
#endif
}
/* ph7_int64 (*xTotalSpace)(const char *) */
static ph7_int64 WinVfs_DiskTotalSpace(const char *zPath)
{
#ifdef _WIN32_WCE
	/* GetDiskFreeSpace is not supported under WINCE */
	SXUNUSED(zPath);
	return 0;
#else
	DWORD dwSectPerClust,dwBytesPerSect,dwFreeClusters,dwTotalClusters;
	void * pConverted;
	WCHAR *p;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return 0;
	}
	p = (WCHAR *)pConverted;
	for(;*p;p++){
		if( *p == '\\' || *p == '/'){
			*p = '\0';
			break;
		}
	}
	rc = GetDiskFreeSpaceW((LPCWSTR)pConverted,&dwSectPerClust,&dwBytesPerSect,&dwFreeClusters,&dwTotalClusters);
	if( !rc ){
		return 0;
	}
	return (ph7_int64)dwTotalClusters * dwSectPerClust * dwBytesPerSect;
#endif
}
/* int (*xFileExists)(const char *) */
static int WinVfs_FileExists(const char *zPath)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		return -1;
	}
	return PH7_OK;
}
/* Open a file in a read-only mode */
static HANDLE OpenReadOnly(LPCWSTR pPath)
{
	DWORD dwType = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS;
	DWORD dwShare = FILE_SHARE_READ | FILE_SHARE_WRITE;
	DWORD dwAccess = GENERIC_READ;
	DWORD dwCreate = OPEN_EXISTING;	
	HANDLE pHandle;
	pHandle = CreateFileW(pPath,dwAccess,dwShare,0,dwCreate,dwType,0);
	if( pHandle == INVALID_HANDLE_VALUE){
		return 0;
	}
	return pHandle;
}
/* ph7_int64 (*xFileSize)(const char *) */
static ph7_int64 WinVfs_FileSize(const char *zPath)
{
	DWORD dwLow,dwHigh;
	void * pConverted;
	ph7_int64 nSize;
	HANDLE pHandle;
	
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	/* Open the file in read-only mode */
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( pHandle ){
		dwLow = GetFileSize(pHandle,&dwHigh);
		nSize = dwHigh;
		nSize <<= 32;
		nSize += dwLow;
		CloseHandle(pHandle);
	}else{
		nSize = -1;
	}
	return nSize;
}
#define TICKS_PER_SECOND 10000000
#define EPOCH_DIFFERENCE 11644473600LL
/* Convert Windows timestamp to UNIX timestamp */
static ph7_int64 convertWindowsTimeToUnixTime(LPFILETIME pTime)
{
    ph7_int64 input,temp;
	input = pTime->dwHighDateTime;
	input <<= 32;
	input += pTime->dwLowDateTime;
    temp = input / TICKS_PER_SECOND; /*convert from 100ns intervals to seconds*/
    temp = temp - EPOCH_DIFFERENCE;  /*subtract number of seconds between epochs*/
    return temp;
}
/* Convert UNIX timestamp to Windows timestamp */
static void convertUnixTimeToWindowsTime(ph7_int64 nUnixtime,LPFILETIME pOut)
{
  ph7_int64 result = EPOCH_DIFFERENCE;
  result += nUnixtime;
  result *= 10000000LL;
  pOut->dwHighDateTime = (DWORD)(nUnixtime>>32);
  pOut->dwLowDateTime = (DWORD)nUnixtime;
}
/* int (*xTouch)(const char *,ph7_int64,ph7_int64) */
static int WinVfs_Touch(const char *zPath,ph7_int64 touch_time,ph7_int64 access_time)
{
	FILETIME sTouch,sAccess;
	void *pConverted;
	void *pHandle;
	BOOL rc = 0;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	if( pHandle ){
		if( touch_time < 0 ){
			GetSystemTimeAsFileTime(&sTouch);
		}else{
			convertUnixTimeToWindowsTime(touch_time,&sTouch);
		}
		if( access_time < 0 ){
			/* Use the touch time */
			sAccess = sTouch; /* Structure assignment */
		}else{
			convertUnixTimeToWindowsTime(access_time,&sAccess);
		}
		rc = SetFileTime(pHandle,&sTouch,&sAccess,0);
		/* Close the handle */
		CloseHandle(pHandle);
	}
	HeapFree(GetProcessHeap(),0,pConverted);
	return rc ? PH7_OK : -1;
}
/* ph7_int64 (*xFileAtime)(const char *) */
static ph7_int64 WinVfs_FileAtime(const char *zPath)
{
	BY_HANDLE_FILE_INFORMATION sInfo;
	void * pConverted;
	ph7_int64 atime;
	HANDLE pHandle;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	/* Open the file in read-only mode */
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	if( pHandle ){
		BOOL rc;
		rc = GetFileInformationByHandle(pHandle,&sInfo);
		if( rc ){
			atime = convertWindowsTimeToUnixTime(&sInfo.ftLastAccessTime);
		}else{
			atime = -1;
		}
		CloseHandle(pHandle);
	}else{
		atime = -1;
	}
	HeapFree(GetProcessHeap(),0,pConverted);
	return atime;
}
/* ph7_int64 (*xFileMtime)(const char *) */
static ph7_int64 WinVfs_FileMtime(const char *zPath)
{
	BY_HANDLE_FILE_INFORMATION sInfo;
	void * pConverted;
	ph7_int64 mtime;
	HANDLE pHandle;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	/* Open the file in read-only mode */
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	if( pHandle ){
		BOOL rc;
		rc = GetFileInformationByHandle(pHandle,&sInfo);
		if( rc ){
			mtime = convertWindowsTimeToUnixTime(&sInfo.ftLastWriteTime);
		}else{
			mtime = -1;
		}
		CloseHandle(pHandle);
	}else{
		mtime = -1;
	}
	HeapFree(GetProcessHeap(),0,pConverted);
	return mtime;
}
/* ph7_int64 (*xFileCtime)(const char *) */
static ph7_int64 WinVfs_FileCtime(const char *zPath)
{
	BY_HANDLE_FILE_INFORMATION sInfo;
	void * pConverted;
	ph7_int64 ctime;
	HANDLE pHandle;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	/* Open the file in read-only mode */
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	if( pHandle ){
		BOOL rc;
		rc = GetFileInformationByHandle(pHandle,&sInfo);
		if( rc ){
			ctime = convertWindowsTimeToUnixTime(&sInfo.ftCreationTime);
		}else{
			ctime = -1;
		}
		CloseHandle(pHandle);
	}else{
		ctime = -1;
	}
	HeapFree(GetProcessHeap(),0,pConverted);
	return ctime;
}
/* int (*xStat)(const char *,ph7_value *,ph7_value *) */
/* int (*xlStat)(const char *,ph7_value *,ph7_value *) */
static int WinVfs_Stat(const char *zPath,ph7_value *pArray,ph7_value *pWorker)
{
	BY_HANDLE_FILE_INFORMATION sInfo;
	void *pConverted;
	HANDLE pHandle;
	BOOL rc;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	/* Open the file in read-only mode */
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( pHandle == 0 ){
		return -1;
	}
	rc = GetFileInformationByHandle(pHandle,&sInfo);
	CloseHandle(pHandle);
	if( !rc ){
		return -1;
	}
	/* dev */
	ph7_value_int64(pWorker,(ph7_int64)sInfo.dwVolumeSerialNumber);
	ph7_array_add_strkey_elem(pArray,"dev",pWorker); /* Will make it's own copy */
	/* ino */
	ph7_value_int64(pWorker,(ph7_int64)(((ph7_int64)sInfo.nFileIndexHigh << 32) | sInfo.nFileIndexLow));
	ph7_array_add_strkey_elem(pArray,"ino",pWorker); /* Will make it's own copy */
	/* mode */
	ph7_value_int(pWorker,0);
	ph7_array_add_strkey_elem(pArray,"mode",pWorker);
	/* nlink */
	ph7_value_int(pWorker,(int)sInfo.nNumberOfLinks);
	ph7_array_add_strkey_elem(pArray,"nlink",pWorker); /* Will make it's own copy */
	/* uid,gid,rdev */
	ph7_value_int(pWorker,0);
	ph7_array_add_strkey_elem(pArray,"uid",pWorker);
	ph7_array_add_strkey_elem(pArray,"gid",pWorker);
	ph7_array_add_strkey_elem(pArray,"rdev",pWorker);
	/* size */
	ph7_value_int64(pWorker,(ph7_int64)(((ph7_int64)sInfo.nFileSizeHigh << 32) | sInfo.nFileSizeLow));
	ph7_array_add_strkey_elem(pArray,"size",pWorker); /* Will make it's own copy */
	/* atime */
	ph7_value_int64(pWorker,convertWindowsTimeToUnixTime(&sInfo.ftLastAccessTime));
	ph7_array_add_strkey_elem(pArray,"atime",pWorker); /* Will make it's own copy */
	/* mtime */
	ph7_value_int64(pWorker,convertWindowsTimeToUnixTime(&sInfo.ftLastWriteTime));
	ph7_array_add_strkey_elem(pArray,"mtime",pWorker); /* Will make it's own copy */
	/* ctime */
	ph7_value_int64(pWorker,convertWindowsTimeToUnixTime(&sInfo.ftCreationTime));
	ph7_array_add_strkey_elem(pArray,"ctime",pWorker); /* Will make it's own copy */
	/* blksize,blocks */
	ph7_value_int(pWorker,0);		
	ph7_array_add_strkey_elem(pArray,"blksize",pWorker);
	ph7_array_add_strkey_elem(pArray,"blocks",pWorker);
	return PH7_OK;
}
/* int (*xIsfile)(const char *) */
static int WinVfs_isfile(const char *zPath)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		return -1;
	}
	return (dwAttr & (FILE_ATTRIBUTE_NORMAL|FILE_ATTRIBUTE_ARCHIVE)) ? PH7_OK : -1;
}
/* int (*xIslink)(const char *) */
static int WinVfs_islink(const char *zPath)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		return -1;
	}
	return (dwAttr & FILE_ATTRIBUTE_REPARSE_POINT) ? PH7_OK : -1;
}
/* int (*xWritable)(const char *) */
static int WinVfs_iswritable(const char *zPath)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		return -1;
	}
	if( (dwAttr & (FILE_ATTRIBUTE_ARCHIVE|FILE_ATTRIBUTE_NORMAL)) == 0 ){
		/* Not a regular file */
		return -1;
	}
	if( dwAttr & FILE_ATTRIBUTE_READONLY ){
		/* Read-only file */
		return -1;
	}
	/* File is writable */
	return PH7_OK;
}
/* int (*xExecutable)(const char *) */
static int WinVfs_isexecutable(const char *zPath)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		return -1;
	}
	if( (dwAttr & FILE_ATTRIBUTE_NORMAL) == 0 ){
		/* Not a regular file */
		return -1;
	}
	/* File is executable */
	return PH7_OK;
}
/* int (*xFiletype)(const char *,ph7_context *) */
static int WinVfs_Filetype(const char *zPath,ph7_context *pCtx)
{
	void * pConverted;
	DWORD dwAttr;
	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		/* Expand 'unknown' */
		ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
		return -1;
	}
	dwAttr = GetFileAttributesW((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( dwAttr == INVALID_FILE_ATTRIBUTES ){
		/* Expand 'unknown' */
		ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
		return -1;
	}
	if(dwAttr & (FILE_ATTRIBUTE_HIDDEN|FILE_ATTRIBUTE_NORMAL|FILE_ATTRIBUTE_ARCHIVE) ){
		ph7_result_string(pCtx,"file",sizeof("file")-1);
	}else if(dwAttr & FILE_ATTRIBUTE_DIRECTORY){
		ph7_result_string(pCtx,"dir",sizeof("dir")-1);
	}else if(dwAttr & FILE_ATTRIBUTE_REPARSE_POINT){
		ph7_result_string(pCtx,"link",sizeof("link")-1);
	}else if(dwAttr & (FILE_ATTRIBUTE_DEVICE)){
		ph7_result_string(pCtx,"block",sizeof("block")-1);
	}else{
		ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
	}
	return PH7_OK;
}
/* int (*xGetenv)(const char *,ph7_context *) */
static int WinVfs_Getenv(const char *zVar,ph7_context *pCtx)
{
	char zValue[1024];
	DWORD n;
	/*
	 * According to MSDN
	 * If lpBuffer is not large enough to hold the data, the return 
	 * value is the buffer size, in characters, required to hold the 
	 * string and its terminating null character and the contents 
	 * of lpBuffer are undefined.
	 */
	n = sizeof(zValue);
	SyMemcpy("Undefined",zValue,sizeof("Undefined")-1);
	/* Extract the environment value */
	n = GetEnvironmentVariableA(zVar,zValue,sizeof(zValue));
	if( !n ){
		/* No such variable*/
		return -1;
	}
	ph7_result_string(pCtx,zValue,(int)n);
	return PH7_OK;
}
/* int (*xSetenv)(const char *,const char *) */
static int WinVfs_Setenv(const char *zName,const char *zValue)
{
	BOOL rc;
	rc = SetEnvironmentVariableA(zName,zValue);
	return rc ? PH7_OK : -1;
}
/* int (*xMmap)(const char *,void **,ph7_int64 *) */
static int WinVfs_Mmap(const char *zPath,void **ppMap,ph7_int64 *pSize)
{
	DWORD dwSizeLow,dwSizeHigh;
	HANDLE pHandle,pMapHandle;
	void *pConverted,*pView;

	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	pHandle = OpenReadOnly((LPCWSTR)pConverted);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( pHandle == 0 ){
		return -1;
	}
	/* Get the file size */
	dwSizeLow = GetFileSize(pHandle,&dwSizeHigh);
	/* Create the mapping */
	pMapHandle = CreateFileMappingW(pHandle,0,PAGE_READONLY,dwSizeHigh,dwSizeLow,0);
	if( pMapHandle == 0 ){
		CloseHandle(pHandle);
		return -1;
	}
	*pSize = ((ph7_int64)dwSizeHigh << 32) | dwSizeLow;
	/* Obtain the view */
	pView = MapViewOfFile(pMapHandle,FILE_MAP_READ,0,0,(SIZE_T)(*pSize));
	if( pView ){
		/* Let the upper layer point to the view */
		*ppMap = pView;
	}
	/* Close the handle
	 * According to MSDN it's OK the close the HANDLES.
	 */
	CloseHandle(pMapHandle);
	CloseHandle(pHandle);
	return pView ? PH7_OK : -1;
}
/* void (*xUnmap)(void *,ph7_int64)  */
static void WinVfs_Unmap(void *pView,ph7_int64 nSize)
{
	nSize = 0; /* Compiler warning */
	UnmapViewOfFile(pView);
}
/* void (*xTempDir)(ph7_context *) */
static void WinVfs_TempDir(ph7_context *pCtx)
{
	CHAR zTemp[1024];
	DWORD n;
	n = GetTempPathA(sizeof(zTemp),zTemp);
	if( n < 1 ){
		/* Assume the default windows temp directory */
		ph7_result_string(pCtx,"C:\\Windows\\Temp",-1/*Compute length automatically*/);
	}else{
		ph7_result_string(pCtx,zTemp,(int)n);
	}
}
/* unsigned int (*xProcessId)(void) */
static unsigned int WinVfs_ProcessId(void)
{
	DWORD nID = 0;
#ifndef __MINGW32__
	nID = GetProcessId(GetCurrentProcess());
#endif /* __MINGW32__ */
	return (unsigned int)nID;
}
/* void (*xUsername)(ph7_context *) */
static void WinVfs_Username(ph7_context *pCtx)
{
	WCHAR zUser[1024];
	DWORD nByte;
	BOOL rc;
	nByte = sizeof(zUser);
	rc = GetUserNameW(zUser,&nByte);
	if( !rc ){
		/* Set a dummy name */
		ph7_result_string(pCtx,"Unknown",sizeof("Unknown")-1);
	}else{
		char *zName;
		zName = unicodeToUtf8(zUser);
		if( zName == 0 ){
			ph7_result_string(pCtx,"Unknown",sizeof("Unknown")-1);
		}else{
			ph7_result_string(pCtx,zName,-1/*Compute length automatically*/); /* Will make it's own copy */
			HeapFree(GetProcessHeap(),0,zName);
		}
	}

}
/* Export the windows vfs */
static const ph7_vfs sWinVfs = {
	"Windows_vfs",
	PH7_VFS_VERSION,
	WinVfs_chdir,    /* int (*xChdir)(const char *) */
	0,               /* int (*xChroot)(const char *); */
	WinVfs_getcwd,   /* int (*xGetcwd)(ph7_context *) */
	WinVfs_mkdir,    /* int (*xMkdir)(const char *,int,int) */
	WinVfs_rmdir,    /* int (*xRmdir)(const char *) */ 
	WinVfs_isdir,    /* int (*xIsdir)(const char *) */
	WinVfs_Rename,   /* int (*xRename)(const char *,const char *) */
	WinVfs_Realpath, /*int (*xRealpath)(const char *,ph7_context *)*/
	WinVfs_Sleep,               /* int (*xSleep)(unsigned int) */
	WinVfs_unlink,   /* int (*xUnlink)(const char *) */
	WinVfs_FileExists, /* int (*xFileExists)(const char *) */
	0, /*int (*xChmod)(const char *,int)*/
	0, /*int (*xChown)(const char *,const char *)*/
	0, /*int (*xChgrp)(const char *,const char *)*/
	WinVfs_DiskFreeSpace,/* ph7_int64 (*xFreeSpace)(const char *) */
	WinVfs_DiskTotalSpace,/* ph7_int64 (*xTotalSpace)(const char *) */
	WinVfs_FileSize, /* ph7_int64 (*xFileSize)(const char *) */
	WinVfs_FileAtime,/* ph7_int64 (*xFileAtime)(const char *) */
	WinVfs_FileMtime,/* ph7_int64 (*xFileMtime)(const char *) */
	WinVfs_FileCtime,/* ph7_int64 (*xFileCtime)(const char *) */
	WinVfs_Stat, /* int (*xStat)(const char *,ph7_value *,ph7_value *) */
	WinVfs_Stat, /* int (*xlStat)(const char *,ph7_value *,ph7_value *) */
	WinVfs_isfile,     /* int (*xIsfile)(const char *) */
	WinVfs_islink,     /* int (*xIslink)(const char *) */
	WinVfs_isfile,     /* int (*xReadable)(const char *) */
	WinVfs_iswritable, /* int (*xWritable)(const char *) */
	WinVfs_isexecutable, /* int (*xExecutable)(const char *) */
	WinVfs_Filetype,   /* int (*xFiletype)(const char *,ph7_context *) */
	WinVfs_Getenv,     /* int (*xGetenv)(const char *,ph7_context *) */
	WinVfs_Setenv,     /* int (*xSetenv)(const char *,const char *) */ 
	WinVfs_Touch,      /* int (*xTouch)(const char *,ph7_int64,ph7_int64) */
	WinVfs_Mmap,       /* int (*xMmap)(const char *,void **,ph7_int64 *) */
	WinVfs_Unmap,      /* void (*xUnmap)(void *,ph7_int64);  */
	0,                 /* int (*xLink)(const char *,const char *,int) */
	0,                 /* int (*xUmask)(int) */
	WinVfs_TempDir,    /* void (*xTempDir)(ph7_context *) */
	WinVfs_ProcessId,  /* unsigned int (*xProcessId)(void) */
	0, /* int (*xUid)(void) */
	0, /* int (*xGid)(void) */
	WinVfs_Username,    /* void (*xUsername)(ph7_context *) */
	0 /* int (*xExec)(const char *,ph7_context *) */
};
/* Windows file IO */
#ifndef INVALID_SET_FILE_POINTER
# define INVALID_SET_FILE_POINTER ((DWORD)-1)
#endif
/* int (*xOpen)(const char *,int,ph7_value *,void **) */
static int WinFile_Open(const char *zPath,int iOpenMode,ph7_value *pResource,void **ppHandle)
{
	DWORD dwType = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS;
	DWORD dwAccess = GENERIC_READ;
	DWORD dwShare,dwCreate;	
	void *pConverted;
	HANDLE pHandle;

	pConverted = convertUtf8Filename(zPath);
	if( pConverted == 0 ){
		return -1;
	}
	/* Set the desired flags according to the open mode */
	if( iOpenMode & PH7_IO_OPEN_CREATE ){
		/* Open existing file, or create if it doesn't exist */
		dwCreate = OPEN_ALWAYS;
		if( iOpenMode & PH7_IO_OPEN_TRUNC ){
			/* If the specified file exists and is writable, the function overwrites the file */
			dwCreate = CREATE_ALWAYS;
		}
	}else if( iOpenMode & PH7_IO_OPEN_EXCL ){
		/* Creates a new file, only if it does not already exist.
		* If the file exists, it fails.
		*/
		dwCreate = CREATE_NEW;
	}else if( iOpenMode & PH7_IO_OPEN_TRUNC ){
		/* Opens a file and truncates it so that its size is zero bytes
		 * The file must exist.
		 */
		dwCreate = TRUNCATE_EXISTING;
	}else{
		/* Opens a file, only if it exists. */
		dwCreate = OPEN_EXISTING;
	}
	if( iOpenMode & PH7_IO_OPEN_RDWR ){
		/* Read+Write access */
		dwAccess |= GENERIC_WRITE;
	}else if( iOpenMode & PH7_IO_OPEN_WRONLY ){
		/* Write only access */
		dwAccess = GENERIC_WRITE;
	}
	if( iOpenMode & PH7_IO_OPEN_APPEND ){
		/* Append mode */
		dwAccess = FILE_APPEND_DATA;
	}
	if( iOpenMode & PH7_IO_OPEN_TEMP ){
		/* File is temporary */
		dwType = FILE_ATTRIBUTE_TEMPORARY;
	}
	dwShare = FILE_SHARE_READ | FILE_SHARE_WRITE;
	pHandle = CreateFileW((LPCWSTR)pConverted,dwAccess,dwShare,0,dwCreate,dwType,0);
	HeapFree(GetProcessHeap(),0,pConverted);
	if( pHandle == INVALID_HANDLE_VALUE){
		SXUNUSED(pResource); /* MSVC warning */
		return -1;
	}
	/* Make the handle accessible to the upper layer */
	*ppHandle = (void *)pHandle;
	return PH7_OK;
}
/* An instance of the following structure is used to record state information 
 * while iterating throw directory entries.
 */
typedef struct WinDir_Info WinDir_Info;
struct WinDir_Info
{
	HANDLE pDirHandle;
	void *pPath;
	WIN32_FIND_DATAW sInfo;
	int rc;
};
/* int (*xOpenDir)(const char *,ph7_value *,void **) */
static int WinDir_Open(const char *zPath,ph7_value *pResource,void **ppHandle)
{
	WinDir_Info *pDirInfo;
	void *pConverted;
	char *zPrep;
	sxu32 n;
	/* Prepare the path */
	n = SyStrlen(zPath);
	zPrep = (char *)HeapAlloc(GetProcessHeap(),0,n+sizeof("\\*")+4);
	if( zPrep == 0 ){
		return -1;
	}
	SyMemcpy((const void *)zPath,zPrep,n);
	zPrep[n]   = '\\';
	zPrep[n+1] =  '*';
	zPrep[n+2] = 0;
	pConverted = convertUtf8Filename(zPrep);
	HeapFree(GetProcessHeap(),0,zPrep);
	if( pConverted == 0 ){
		return -1;
	}
	/* Allocate a new instance */
	pDirInfo = (WinDir_Info *)HeapAlloc(GetProcessHeap(),0,sizeof(WinDir_Info));
	if( pDirInfo == 0 ){
		pResource = 0; /* Compiler warning */
		return -1;
	}
	pDirInfo->rc = SXRET_OK;
	pDirInfo->pDirHandle = FindFirstFileW((LPCWSTR)pConverted,&pDirInfo->sInfo);
	if( pDirInfo->pDirHandle == INVALID_HANDLE_VALUE ){
		/* Cannot open directory */
		HeapFree(GetProcessHeap(),0,pConverted);
		HeapFree(GetProcessHeap(),0,pDirInfo);
		return -1;
	}
	/* Save the path */
	pDirInfo->pPath = pConverted;
	/* Save our structure */
	*ppHandle = pDirInfo;
	return PH7_OK;
}
/* void (*xCloseDir)(void *) */
static void WinDir_Close(void *pUserData)
{
	WinDir_Info *pDirInfo = (WinDir_Info *)pUserData;
	if( pDirInfo->pDirHandle != INVALID_HANDLE_VALUE ){
		FindClose(pDirInfo->pDirHandle);
	}
	HeapFree(GetProcessHeap(),0,pDirInfo->pPath);
	HeapFree(GetProcessHeap(),0,pDirInfo);
}
/* void (*xClose)(void *); */
static void WinFile_Close(void *pUserData)
{
	HANDLE pHandle = (HANDLE)pUserData;
	CloseHandle(pHandle);
}
/* int (*xReadDir)(void *,ph7_context *) */
static int WinDir_Read(void *pUserData,ph7_context *pCtx)
{
	WinDir_Info *pDirInfo = (WinDir_Info *)pUserData;
	LPWIN32_FIND_DATAW pData;
	char *zName;
	BOOL rc;
	sxu32 n;
	if( pDirInfo->rc != SXRET_OK ){
		/* No more entry to process */
		return -1;
	}
	pData = &pDirInfo->sInfo;
	for(;;){
		zName = unicodeToUtf8(pData->cFileName);
		if( zName == 0 ){
			/* Out of memory */
			return -1;
		}
		n = SyStrlen(zName);
		/* Ignore '.' && '..' */
		if( n > sizeof("..")-1 || zName[0] != '.' || ( n == sizeof("..")-1 && zName[1] != '.') ){
			break;
		}
		HeapFree(GetProcessHeap(),0,zName);
		rc = FindNextFileW(pDirInfo->pDirHandle,&pDirInfo->sInfo);
		if( !rc ){
			return -1;
		}
	}
	/* Return the current file name */
	ph7_result_string(pCtx,zName,-1);
	HeapFree(GetProcessHeap(),0,zName);
	/* Point to the next entry */
	rc = FindNextFileW(pDirInfo->pDirHandle,&pDirInfo->sInfo);
	if( !rc ){
		pDirInfo->rc = SXERR_EOF;
	}
	return PH7_OK;
}
/* void (*xRewindDir)(void *) */
static void WinDir_RewindDir(void *pUserData)
{
	WinDir_Info *pDirInfo = (WinDir_Info *)pUserData;
	FindClose(pDirInfo->pDirHandle);
	pDirInfo->pDirHandle = FindFirstFileW((LPCWSTR)pDirInfo->pPath,&pDirInfo->sInfo);
	if( pDirInfo->pDirHandle == INVALID_HANDLE_VALUE ){
		pDirInfo->rc = SXERR_EOF;
	}else{
		pDirInfo->rc = SXRET_OK;
	}
}
/* ph7_int64 (*xRead)(void *,void *,ph7_int64); */
static ph7_int64 WinFile_Read(void *pOS,void *pBuffer,ph7_int64 nDatatoRead)
{
	HANDLE pHandle = (HANDLE)pOS;
	DWORD nRd;
	BOOL rc;
	rc = ReadFile(pHandle,pBuffer,(DWORD)nDatatoRead,&nRd,0);
	if( !rc ){
		/* EOF or IO error */
		return -1;
	}
	return (ph7_int64)nRd;
}
/* ph7_int64 (*xWrite)(void *,const void *,ph7_int64); */
static ph7_int64 WinFile_Write(void *pOS,const void *pBuffer,ph7_int64 nWrite)
{
	const char *zData = (const char *)pBuffer;
	HANDLE pHandle = (HANDLE)pOS;
	ph7_int64 nCount;
	DWORD nWr;
	BOOL rc;
	nWr = 0;
	nCount = 0;
	for(;;){
		if( nWrite < 1 ){
			break;
		}
		rc = WriteFile(pHandle,zData,(DWORD)nWrite,&nWr,0);
		if( !rc ){
			/* IO error */
			break;
		}
		nWrite -= nWr;
		nCount += nWr;
		zData += nWr;
	}
	if( nWrite > 0 ){
		return -1;
	}
	return nCount;
}
/* int (*xSeek)(void *,ph7_int64,int) */
static int WinFile_Seek(void *pUserData,ph7_int64 iOfft,int whence)
{
	HANDLE pHandle = (HANDLE)pUserData;
	DWORD dwMove,dwNew;
	LONG nHighOfft;
	switch(whence){
	case 1:/*SEEK_CUR*/
		dwMove = FILE_CURRENT;
		break;
	case 2: /* SEEK_END */
		dwMove = FILE_END;
		break;
	case 0: /* SEEK_SET */
	default:
		dwMove = FILE_BEGIN;
		break;
	}
	nHighOfft = (LONG)(iOfft >> 32);
	dwNew = SetFilePointer(pHandle,(LONG)iOfft,&nHighOfft,dwMove);
	if( dwNew == INVALID_SET_FILE_POINTER ){
		return -1;
	}
	return PH7_OK;
}
/* int (*xLock)(void *,int) */
static int WinFile_Lock(void *pUserData,int lock_type)
{
	HANDLE pHandle = (HANDLE)pUserData;
	static DWORD dwLo = 0,dwHi = 0; /* xx: MT-SAFE */
	OVERLAPPED sDummy;
	BOOL rc;
	SyZero(&sDummy,sizeof(sDummy));
	/* Get the file size */
	if( lock_type < 1 ){
		/* Unlock the file */
		rc = UnlockFileEx(pHandle,0,dwLo,dwHi,&sDummy);
	}else{
		DWORD dwFlags = LOCKFILE_FAIL_IMMEDIATELY; /* Shared non-blocking lock by default*/
		/* Lock the file */
		if( lock_type == 1 /* LOCK_EXCL */ ){
			dwFlags |= LOCKFILE_EXCLUSIVE_LOCK;
		}
		dwLo = GetFileSize(pHandle,&dwHi);
		rc = LockFileEx(pHandle,dwFlags,0,dwLo,dwHi,&sDummy);
	}
	return rc ? PH7_OK : -1 /* Lock error */;
}
/* ph7_int64 (*xTell)(void *) */
static ph7_int64 WinFile_Tell(void *pUserData)
{
	HANDLE pHandle = (HANDLE)pUserData;
	DWORD dwNew;
	dwNew = SetFilePointer(pHandle,0,0,FILE_CURRENT/* SEEK_CUR */);
	if( dwNew == INVALID_SET_FILE_POINTER ){
		return -1;
	}
	return (ph7_int64)dwNew;
}
/* int (*xTrunc)(void *,ph7_int64) */
static int WinFile_Trunc(void *pUserData,ph7_int64 nOfft)
{
	HANDLE pHandle = (HANDLE)pUserData;
	LONG HighOfft;
	DWORD dwNew;
	BOOL rc;
	HighOfft = (LONG)(nOfft >> 32);
	dwNew = SetFilePointer(pHandle,(LONG)nOfft,&HighOfft,FILE_BEGIN);
	if( dwNew == INVALID_SET_FILE_POINTER ){
		return -1;
	}
	rc = SetEndOfFile(pHandle);
	return rc ? PH7_OK : -1;
}
/* int (*xSync)(void *); */
static int WinFile_Sync(void *pUserData)
{
	HANDLE pHandle = (HANDLE)pUserData;
	BOOL rc;
	rc = FlushFileBuffers(pHandle);
	return rc ? PH7_OK : - 1;
}
/* int (*xStat)(void *,ph7_value *,ph7_value *) */
static int WinFile_Stat(void *pUserData,ph7_value *pArray,ph7_value *pWorker)
{
	BY_HANDLE_FILE_INFORMATION sInfo;
	HANDLE pHandle = (HANDLE)pUserData;
	BOOL rc;
	rc = GetFileInformationByHandle(pHandle,&sInfo);
	if( !rc ){
		return -1;
	}
	/* dev */
	ph7_value_int64(pWorker,(ph7_int64)sInfo.dwVolumeSerialNumber);
	ph7_array_add_strkey_elem(pArray,"dev",pWorker); /* Will make it's own copy */
	/* ino */
	ph7_value_int64(pWorker,(ph7_int64)(((ph7_int64)sInfo.nFileIndexHigh << 32) | sInfo.nFileIndexLow));
	ph7_array_add_strkey_elem(pArray,"ino",pWorker); /* Will make it's own copy */
	/* mode */
	ph7_value_int(pWorker,0);
	ph7_array_add_strkey_elem(pArray,"mode",pWorker);
	/* nlink */
	ph7_value_int(pWorker,(int)sInfo.nNumberOfLinks);
	ph7_array_add_strkey_elem(pArray,"nlink",pWorker); /* Will make it's own copy */
	/* uid,gid,rdev */
	ph7_value_int(pWorker,0);
	ph7_array_add_strkey_elem(pArray,"uid",pWorker);
	ph7_array_add_strkey_elem(pArray,"gid",pWorker);
	ph7_array_add_strkey_elem(pArray,"rdev",pWorker);
	/* size */
	ph7_value_int64(pWorker,(ph7_int64)(((ph7_int64)sInfo.nFileSizeHigh << 32) | sInfo.nFileSizeLow));
	ph7_array_add_strkey_elem(pArray,"size",pWorker); /* Will make it's own copy */
	/* atime */
	ph7_value_int64(pWorker,convertWindowsTimeToUnixTime(&sInfo.ftLastAccessTime));
	ph7_array_add_strkey_elem(pArray,"atime",pWorker); /* Will make it's own copy */
	/* mtime */
	ph7_value_int64(pWorker,convertWindowsTimeToUnixTime(&sInfo.ftLastWriteTime));
	ph7_array_add_strkey_elem(pArray,"mtime",pWorker); /* Will make it's own copy */
	/* ctime */
	ph7_value_int64(pWorker,convertWindowsTimeToUnixTime(&sInfo.ftCreationTime));
	ph7_array_add_strkey_elem(pArray,"ctime",pWorker); /* Will make it's own copy */
	/* blksize,blocks */
	ph7_value_int(pWorker,0);		
	ph7_array_add_strkey_elem(pArray,"blksize",pWorker);
	ph7_array_add_strkey_elem(pArray,"blocks",pWorker);
	return PH7_OK;
}
/* Export the file:// stream */
static const ph7_io_stream sWinFileStream = {
	"file", /* Stream name */
	PH7_IO_STREAM_VERSION,
	WinFile_Open,  /* xOpen */
	WinDir_Open,   /* xOpenDir */
	WinFile_Close, /* xClose */
	WinDir_Close,  /* xCloseDir */
	WinFile_Read,  /* xRead */
	WinDir_Read,   /* xReadDir */
	WinFile_Write, /* xWrite */
	WinFile_Seek,  /* xSeek */
	WinFile_Lock,  /* xLock */
	WinDir_RewindDir, /* xRewindDir */
	WinFile_Tell,  /* xTell */
	WinFile_Trunc, /* xTrunc */
	WinFile_Sync,  /* xSeek */
	WinFile_Stat   /* xStat */
};
#elif defined(__UNIXES__)
/*
 * UNIX VFS implementation for the PH7 engine.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
#include <sys/types.h>
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/file.h>
#include <pwd.h>
#include <grp.h>
#include <dirent.h>
#include <utime.h>
#include <stdio.h>
#include <stdlib.h>
/* int (*xchdir)(const char *) */
static int UnixVfs_chdir(const char *zPath)
{
  int rc;
  rc = chdir(zPath);
  return rc == 0 ? PH7_OK : -1;
}
/* int (*xGetcwd)(ph7_context *) */
static int UnixVfs_getcwd(ph7_context *pCtx)
{
	char zBuf[4096];
	char *zDir;
	/* Get the current directory */
	zDir = getcwd(zBuf,sizeof(zBuf));
	if( zDir == 0 ){
	  return -1;
    }
	ph7_result_string(pCtx,zDir,-1/*Compute length automatically*/);
	return PH7_OK;
}
/* int (*xMkdir)(const char *,int,int) */
static int UnixVfs_mkdir(const char *zPath,int mode,int recursive)
{
	int rc;
        rc = mkdir(zPath,mode);
	recursive = 0; /* cc warning */
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xRmdir)(const char *) */
static int UnixVfs_rmdir(const char *zPath)
{
	int rc;
	rc = rmdir(zPath);
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xIsdir)(const char *) */
static int UnixVfs_isdir(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){
	 return -1;
	}
	rc = S_ISDIR(st.st_mode);
	return rc ? PH7_OK : -1 ;
}
/* int (*xRename)(const char *,const char *) */
static int UnixVfs_Rename(const char *zOld,const char *zNew)
{
	int rc;
	rc = rename(zOld,zNew);
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xRealpath)(const char *,ph7_context *) */
static int UnixVfs_Realpath(const char *zPath,ph7_context *pCtx)
{
#ifndef PH7_UNIX_OLD_LIBC
	char *zReal;
	zReal = realpath(zPath,0);
	if( zReal == 0 ){
	  return -1;
	}
	ph7_result_string(pCtx,zReal,-1/*Compute length automatically*/);
        /* Release the allocated buffer */
	free(zReal);
	return PH7_OK;
#else
    zPath = 0; /* cc warning */
    pCtx = 0;
    return -1;
#endif
}
/* int (*xSleep)(unsigned int) */
static int UnixVfs_Sleep(unsigned int uSec)
{
	usleep(uSec);
	return PH7_OK;
}
/* int (*xUnlink)(const char *) */
static int UnixVfs_unlink(const char *zPath)
{
	int rc;
	rc = unlink(zPath);
	return rc == 0 ? PH7_OK : -1 ;
}
/* int (*xFileExists)(const char *) */
static int UnixVfs_FileExists(const char *zPath)
{
	int rc;
	rc = access(zPath,F_OK);
	return rc == 0 ? PH7_OK : -1;
}
/* ph7_int64 (*xFileSize)(const char *) */
static ph7_int64 UnixVfs_FileSize(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){ 
	 return -1;
	}
	return (ph7_int64)st.st_size;
}
/* int (*xTouch)(const char *,ph7_int64,ph7_int64) */
static int UnixVfs_Touch(const char *zPath,ph7_int64 touch_time,ph7_int64 access_time)
{
	struct utimbuf ut;
	int rc;
	ut.actime  = (time_t)access_time;
	ut.modtime = (time_t)touch_time;
	rc = utime(zPath,&ut);
	if( rc != 0 ){
	 return -1;
	}
	return PH7_OK;
}
/* ph7_int64 (*xFileAtime)(const char *) */
static ph7_int64 UnixVfs_FileAtime(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){ 
	 return -1;
	}
	return (ph7_int64)st.st_atime;
}
/* ph7_int64 (*xFileMtime)(const char *) */
static ph7_int64 UnixVfs_FileMtime(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){ 
	 return -1;
	}
	return (ph7_int64)st.st_mtime;
}
/* ph7_int64 (*xFileCtime)(const char *) */
static ph7_int64 UnixVfs_FileCtime(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){ 
	 return -1;
	}
	return (ph7_int64)st.st_ctime;
}
/* int (*xStat)(const char *,ph7_value *,ph7_value *) */
static int UnixVfs_Stat(const char *zPath,ph7_value *pArray,ph7_value *pWorker)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){ 
	 return -1;
	}
	/* dev */
	ph7_value_int64(pWorker,(ph7_int64)st.st_dev);
	ph7_array_add_strkey_elem(pArray,"dev",pWorker); /* Will make it's own copy */
	/* ino */
	ph7_value_int64(pWorker,(ph7_int64)st.st_ino);
	ph7_array_add_strkey_elem(pArray,"ino",pWorker); /* Will make it's own copy */
	/* mode */
	ph7_value_int(pWorker,(int)st.st_mode);
	ph7_array_add_strkey_elem(pArray,"mode",pWorker);
	/* nlink */
	ph7_value_int(pWorker,(int)st.st_nlink);
	ph7_array_add_strkey_elem(pArray,"nlink",pWorker); /* Will make it's own copy */
	/* uid,gid,rdev */
	ph7_value_int(pWorker,(int)st.st_uid);
	ph7_array_add_strkey_elem(pArray,"uid",pWorker);
	ph7_value_int(pWorker,(int)st.st_gid);
	ph7_array_add_strkey_elem(pArray,"gid",pWorker);
	ph7_value_int(pWorker,(int)st.st_rdev);
	ph7_array_add_strkey_elem(pArray,"rdev",pWorker);
	/* size */
	ph7_value_int64(pWorker,(ph7_int64)st.st_size);
	ph7_array_add_strkey_elem(pArray,"size",pWorker); /* Will make it's own copy */
	/* atime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_atime);
	ph7_array_add_strkey_elem(pArray,"atime",pWorker); /* Will make it's own copy */
	/* mtime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_mtime);
	ph7_array_add_strkey_elem(pArray,"mtime",pWorker); /* Will make it's own copy */
	/* ctime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_ctime);
	ph7_array_add_strkey_elem(pArray,"ctime",pWorker); /* Will make it's own copy */
	/* blksize,blocks */
	ph7_value_int(pWorker,(int)st.st_blksize);		
	ph7_array_add_strkey_elem(pArray,"blksize",pWorker);
	ph7_value_int(pWorker,(int)st.st_blocks);
	ph7_array_add_strkey_elem(pArray,"blocks",pWorker);
	return PH7_OK;
}
/* int (*xlStat)(const char *,ph7_value *,ph7_value *) */
static int UnixVfs_lStat(const char *zPath,ph7_value *pArray,ph7_value *pWorker)
{
	struct stat st;
	int rc;
	rc = lstat(zPath,&st);
	if( rc != 0 ){ 
	 return -1;
	}
	/* dev */
	ph7_value_int64(pWorker,(ph7_int64)st.st_dev);
	ph7_array_add_strkey_elem(pArray,"dev",pWorker); /* Will make it's own copy */
	/* ino */
	ph7_value_int64(pWorker,(ph7_int64)st.st_ino);
	ph7_array_add_strkey_elem(pArray,"ino",pWorker); /* Will make it's own copy */
	/* mode */
	ph7_value_int(pWorker,(int)st.st_mode);
	ph7_array_add_strkey_elem(pArray,"mode",pWorker);
	/* nlink */
	ph7_value_int(pWorker,(int)st.st_nlink);
	ph7_array_add_strkey_elem(pArray,"nlink",pWorker); /* Will make it's own copy */
	/* uid,gid,rdev */
	ph7_value_int(pWorker,(int)st.st_uid);
	ph7_array_add_strkey_elem(pArray,"uid",pWorker);
	ph7_value_int(pWorker,(int)st.st_gid);
	ph7_array_add_strkey_elem(pArray,"gid",pWorker);
	ph7_value_int(pWorker,(int)st.st_rdev);
	ph7_array_add_strkey_elem(pArray,"rdev",pWorker);
	/* size */
	ph7_value_int64(pWorker,(ph7_int64)st.st_size);
	ph7_array_add_strkey_elem(pArray,"size",pWorker); /* Will make it's own copy */
	/* atime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_atime);
	ph7_array_add_strkey_elem(pArray,"atime",pWorker); /* Will make it's own copy */
	/* mtime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_mtime);
	ph7_array_add_strkey_elem(pArray,"mtime",pWorker); /* Will make it's own copy */
	/* ctime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_ctime);
	ph7_array_add_strkey_elem(pArray,"ctime",pWorker); /* Will make it's own copy */
	/* blksize,blocks */
	ph7_value_int(pWorker,(int)st.st_blksize);		
	ph7_array_add_strkey_elem(pArray,"blksize",pWorker);
	ph7_value_int(pWorker,(int)st.st_blocks);
	ph7_array_add_strkey_elem(pArray,"blocks",pWorker);
	return PH7_OK;
}
/* int (*xChmod)(const char *,int) */
static int UnixVfs_Chmod(const char *zPath,int mode)
{
    int rc;
    rc = chmod(zPath,(mode_t)mode);
    return rc == 0 ? PH7_OK : - 1;
}
/* int (*xChown)(const char *,const char *) */
static int UnixVfs_Chown(const char *zPath,const char *zUser)
{
#ifndef PH7_UNIX_STATIC_BUILD
  struct passwd *pwd;
  uid_t uid;
  int rc;
  pwd = getpwnam(zUser);   /* Try getting UID for username */
  if (pwd == 0) {
    return -1;
  }
  uid = pwd->pw_uid;
  rc = chown(zPath,uid,-1);
  return rc == 0 ? PH7_OK : -1;
#else
	SXUNUSED(zPath);
	SXUNUSED(zUser);
	return -1;
#endif /* PH7_UNIX_STATIC_BUILD */
}
/* int (*xChgrp)(const char *,const char *) */
static int UnixVfs_Chgrp(const char *zPath,const char *zGroup)
{
#ifndef PH7_UNIX_STATIC_BUILD
  struct group *group;
  gid_t gid;
  int rc;
  group = getgrnam(zGroup);
  if (group == 0) {
    return -1;
  }
  gid = group->gr_gid;
  rc = chown(zPath,-1,gid);
  return rc == 0 ? PH7_OK : -1;
#else
	SXUNUSED(zPath);
	SXUNUSED(zGroup);
	return -1;
#endif /* PH7_UNIX_STATIC_BUILD */
}
/* int (*xIsfile)(const char *) */
static int UnixVfs_isfile(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){
	 return -1;
	}
	rc = S_ISREG(st.st_mode);
	return rc ? PH7_OK : -1 ;
}
/* int (*xIslink)(const char *) */
static int UnixVfs_islink(const char *zPath)
{
	struct stat st;
	int rc;
	rc = stat(zPath,&st);
	if( rc != 0 ){
	 return -1;
	}
	rc = S_ISLNK(st.st_mode);
	return rc ? PH7_OK : -1 ;
}
/* int (*xReadable)(const char *) */
static int UnixVfs_isreadable(const char *zPath)
{
	int rc;
	rc = access(zPath,R_OK);
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xWritable)(const char *) */
static int UnixVfs_iswritable(const char *zPath)
{
	int rc;
	rc = access(zPath,W_OK);
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xExecutable)(const char *) */
static int UnixVfs_isexecutable(const char *zPath)
{
	int rc;
	rc = access(zPath,X_OK);
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xFiletype)(const char *,ph7_context *) */
static int UnixVfs_Filetype(const char *zPath,ph7_context *pCtx)
{
	struct stat st;
	int rc;
    rc = stat(zPath,&st);
	if( rc != 0 ){
	  /* Expand 'unknown' */
	  ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
	  return -1;
	}
	if(S_ISREG(st.st_mode) ){
		ph7_result_string(pCtx,"file",sizeof("file")-1);
	}else if(S_ISDIR(st.st_mode)){
		ph7_result_string(pCtx,"dir",sizeof("dir")-1);
	}else if(S_ISLNK(st.st_mode)){
		ph7_result_string(pCtx,"link",sizeof("link")-1);
	}else if(S_ISBLK(st.st_mode)){
		ph7_result_string(pCtx,"block",sizeof("block")-1);
    }else if(S_ISSOCK(st.st_mode)){
		ph7_result_string(pCtx,"socket",sizeof("socket")-1);
	}else if(S_ISFIFO(st.st_mode)){
       ph7_result_string(pCtx,"fifo",sizeof("fifo")-1);
	}else{
		ph7_result_string(pCtx,"unknown",sizeof("unknown")-1);
	}
	return PH7_OK;
}
/* int (*xGetenv)(const char *,ph7_context *) */
static int UnixVfs_Getenv(const char *zVar,ph7_context *pCtx)
{
	char *zEnv;
	zEnv = getenv(zVar);
	if( zEnv == 0 ){
	  return -1;
	}
	ph7_result_string(pCtx,zEnv,-1/*Compute length automatically*/);
	return PH7_OK;
}
/* int (*xSetenv)(const char *,const char *) */
static int UnixVfs_Setenv(const char *zName,const char *zValue)
{
   int rc;
   rc = setenv(zName,zValue,1);
   return rc == 0 ? PH7_OK : -1;
}
/* int (*xMmap)(const char *,void **,ph7_int64 *) */
static int UnixVfs_Mmap(const char *zPath,void **ppMap,ph7_int64 *pSize)
{
	struct stat st;
	void *pMap;
	int fd;
	int rc;
	/* Open the file in a read-only mode */
	fd = open(zPath,O_RDONLY);
	if( fd < 0 ){
		return -1;
	}
	/* stat the handle */
	fstat(fd,&st);
	/* Obtain a memory view of the whole file */
	pMap = mmap(0,st.st_size,PROT_READ,MAP_PRIVATE|MAP_FILE,fd,0);
	rc = PH7_OK;
	if( pMap == MAP_FAILED ){
		rc = -1;
	}else{
		/* Point to the memory view */
		*ppMap = pMap;
		*pSize = (ph7_int64)st.st_size;
	}
	close(fd);
	return rc;
}
/* void (*xUnmap)(void *,ph7_int64)  */
static void UnixVfs_Unmap(void *pView,ph7_int64 nSize)
{
	munmap(pView,(size_t)nSize);
}
/* void (*xTempDir)(ph7_context *) */
static void UnixVfs_TempDir(ph7_context *pCtx)
{
	static const char *azDirs[] = {
     "/var/tmp",
     "/usr/tmp",
	 "/usr/local/tmp"
  };
  unsigned int i;
  struct stat buf;
  const char *zDir;
  zDir = getenv("TMPDIR");
  if( zDir && zDir[0] != 0 && !access(zDir,07) ){
	  ph7_result_string(pCtx,zDir,-1);
	  return;
  }
  for(i=0; i<sizeof(azDirs)/sizeof(azDirs[0]); i++){
	zDir=azDirs[i];
    if( zDir==0 ) continue;
    if( stat(zDir, &buf) ) continue;
    if( !S_ISDIR(buf.st_mode) ) continue;
    if( access(zDir, 07) ) continue;
    /* Got one */
	ph7_result_string(pCtx,zDir,-1);
	return;
  }
  /* Default temp dir */
  ph7_result_string(pCtx,"/tmp",(int)sizeof("/tmp")-1);
}
/* unsigned int (*xProcessId)(void) */
static unsigned int UnixVfs_ProcessId(void)
{
	return (unsigned int)getpid();
}
/* int (*xUid)(void) */
static int UnixVfs_uid(void)
{
	return (int)getuid();
}
/* int (*xGid)(void) */
static int UnixVfs_gid(void)
{
	return (int)getgid();
}
/* int (*xUmask)(int) */
static int UnixVfs_Umask(int new_mask)
{
	int old_mask;
	old_mask = umask(new_mask);
	return old_mask;
}
/* void (*xUsername)(ph7_context *) */
static void UnixVfs_Username(ph7_context *pCtx)
{
#ifndef PH7_UNIX_STATIC_BUILD
  struct passwd *pwd;
  uid_t uid;
  uid = getuid();
  pwd = getpwuid(uid);   /* Try getting UID for username */
  if (pwd == 0) {
    return;
  }
  /* Return the username */
  ph7_result_string(pCtx,pwd->pw_name,-1);
#else
  ph7_result_string(pCtx,"Unknown",-1);
#endif /* PH7_UNIX_STATIC_BUILD */
  return;
}
/* int (*xLink)(const char *,const char *,int) */
static int UnixVfs_link(const char *zSrc,const char *zTarget,int is_sym)
{
	int rc;
	if( is_sym ){
		/* Symbolic link */
		rc = symlink(zSrc,zTarget);
	}else{
		/* Hard link */
		rc = link(zSrc,zTarget);
	}
	return rc == 0 ? PH7_OK : -1;
}
/* int (*xChroot)(const char *) */
static int UnixVfs_chroot(const char *zRootDir)
{
	int rc;
	rc = chroot(zRootDir);
	return rc == 0 ? PH7_OK : -1;
}
/* Export the UNIX vfs */
static const ph7_vfs sUnixVfs = {
	"Unix_vfs",
	PH7_VFS_VERSION,
	UnixVfs_chdir,    /* int (*xChdir)(const char *) */
	UnixVfs_chroot,   /* int (*xChroot)(const char *); */
	UnixVfs_getcwd,   /* int (*xGetcwd)(ph7_context *) */
	UnixVfs_mkdir,    /* int (*xMkdir)(const char *,int,int) */
	UnixVfs_rmdir,    /* int (*xRmdir)(const char *) */ 
	UnixVfs_isdir,    /* int (*xIsdir)(const char *) */
	UnixVfs_Rename,   /* int (*xRename)(const char *,const char *) */
	UnixVfs_Realpath, /*int (*xRealpath)(const char *,ph7_context *)*/
	UnixVfs_Sleep,    /* int (*xSleep)(unsigned int) */
	UnixVfs_unlink,   /* int (*xUnlink)(const char *) */
	UnixVfs_FileExists, /* int (*xFileExists)(const char *) */
	UnixVfs_Chmod, /*int (*xChmod)(const char *,int)*/
	UnixVfs_Chown, /*int (*xChown)(const char *,const char *)*/
	UnixVfs_Chgrp, /*int (*xChgrp)(const char *,const char *)*/
	0,             /* ph7_int64 (*xFreeSpace)(const char *) */
	0,             /* ph7_int64 (*xTotalSpace)(const char *) */
	UnixVfs_FileSize, /* ph7_int64 (*xFileSize)(const char *) */
	UnixVfs_FileAtime,/* ph7_int64 (*xFileAtime)(const char *) */
	UnixVfs_FileMtime,/* ph7_int64 (*xFileMtime)(const char *) */
	UnixVfs_FileCtime,/* ph7_int64 (*xFileCtime)(const char *) */
	UnixVfs_Stat,  /* int (*xStat)(const char *,ph7_value *,ph7_value *) */
	UnixVfs_lStat, /* int (*xlStat)(const char *,ph7_value *,ph7_value *) */
	UnixVfs_isfile,     /* int (*xIsfile)(const char *) */
	UnixVfs_islink,     /* int (*xIslink)(const char *) */
	UnixVfs_isreadable, /* int (*xReadable)(const char *) */
	UnixVfs_iswritable, /* int (*xWritable)(const char *) */
	UnixVfs_isexecutable,/* int (*xExecutable)(const char *) */
	UnixVfs_Filetype,   /* int (*xFiletype)(const char *,ph7_context *) */
	UnixVfs_Getenv,     /* int (*xGetenv)(const char *,ph7_context *) */
	UnixVfs_Setenv,     /* int (*xSetenv)(const char *,const char *) */ 
	UnixVfs_Touch,      /* int (*xTouch)(const char *,ph7_int64,ph7_int64) */
	UnixVfs_Mmap,       /* int (*xMmap)(const char *,void **,ph7_int64 *) */
	UnixVfs_Unmap,      /* void (*xUnmap)(void *,ph7_int64);  */
	UnixVfs_link,       /* int (*xLink)(const char *,const char *,int) */
	UnixVfs_Umask,      /* int (*xUmask)(int) */
	UnixVfs_TempDir,    /* void (*xTempDir)(ph7_context *) */
	UnixVfs_ProcessId,  /* unsigned int (*xProcessId)(void) */
	UnixVfs_uid, /* int (*xUid)(void) */
	UnixVfs_gid, /* int (*xGid)(void) */
	UnixVfs_Username,    /* void (*xUsername)(ph7_context *) */
	0 /* int (*xExec)(const char *,ph7_context *) */
};
/* UNIX File IO */
#define PH7_UNIX_OPEN_MODE	0640 /* Default open mode */
/* int (*xOpen)(const char *,int,ph7_value *,void **) */
static int UnixFile_Open(const char *zPath,int iOpenMode,ph7_value *pResource,void **ppHandle)
{
	int iOpen = O_RDONLY;
	int fd;
	/* Set the desired flags according to the open mode */
	if( iOpenMode & PH7_IO_OPEN_CREATE ){
		/* Open existing file, or create if it doesn't exist */
		iOpen = O_CREAT;
		if( iOpenMode & PH7_IO_OPEN_TRUNC ){
			/* If the specified file exists and is writable, the function overwrites the file */
			iOpen |= O_TRUNC;
			SXUNUSED(pResource); /* cc warning */
		}
	}else if( iOpenMode & PH7_IO_OPEN_EXCL ){
		/* Creates a new file, only if it does not already exist.
		* If the file exists, it fails.
		*/
		iOpen = O_CREAT|O_EXCL;
	}else if( iOpenMode & PH7_IO_OPEN_TRUNC ){
		/* Opens a file and truncates it so that its size is zero bytes
		 * The file must exist.
		 */
		iOpen = O_RDWR|O_TRUNC;
	}
	if( iOpenMode & PH7_IO_OPEN_RDWR ){
		/* Read+Write access */
		iOpen &= ~O_RDONLY;
		iOpen |= O_RDWR;
	}else if( iOpenMode & PH7_IO_OPEN_WRONLY ){
		/* Write only access */
		iOpen &= ~O_RDONLY;
		iOpen |= O_WRONLY;
	}
	if( iOpenMode & PH7_IO_OPEN_APPEND ){
		/* Append mode */
		iOpen |= O_APPEND;
	}
#ifdef O_TEMP
	if( iOpenMode & PH7_IO_OPEN_TEMP ){
		/* File is temporary */
		iOpen |= O_TEMP;
	}
#endif
	/* Open the file now */
	fd = open(zPath,iOpen,PH7_UNIX_OPEN_MODE);
	if( fd < 0 ){
		/* IO error */
		return -1;
	}
	/* Save the handle */
	*ppHandle = SX_INT_TO_PTR(fd);
	return PH7_OK;
}
/* int (*xOpenDir)(const char *,ph7_value *,void **) */
static int UnixDir_Open(const char *zPath,ph7_value *pResource,void **ppHandle)
{
	DIR *pDir;
	/* Open the target directory */
	pDir = opendir(zPath);
	if( pDir == 0 ){
		pResource = 0; /* Compiler warning */
		return -1;
	}
	/* Save our structure */
	*ppHandle = pDir;
	return PH7_OK;
}
/* void (*xCloseDir)(void *) */
static void UnixDir_Close(void *pUserData)
{
	closedir((DIR *)pUserData);
}
/* void (*xClose)(void *); */
static void UnixFile_Close(void *pUserData)
{
	close(SX_PTR_TO_INT(pUserData));
}
/* int (*xReadDir)(void *,ph7_context *) */
static int UnixDir_Read(void *pUserData,ph7_context *pCtx)
{
	DIR *pDir = (DIR *)pUserData;
	struct dirent *pEntry;
	char *zName = 0; /* cc warning */
	sxu32 n = 0;
	for(;;){
		pEntry = readdir(pDir);
		if( pEntry == 0 ){
			/* No more entries to process */
			return -1;
		}
		zName = pEntry->d_name; 
		n = SyStrlen(zName);
		/* Ignore '.' && '..' */
		if( n > sizeof("..")-1 || zName[0] != '.' || ( n == sizeof("..")-1 && zName[1] != '.') ){
			break;
		}
		/* Next entry */
	}
	/* Return the current file name */
	ph7_result_string(pCtx,zName,(int)n);
	return PH7_OK;
}
/* void (*xRewindDir)(void *) */
static void UnixDir_Rewind(void *pUserData)
{
	rewinddir((DIR *)pUserData);
}
/* ph7_int64 (*xRead)(void *,void *,ph7_int64); */
static ph7_int64 UnixFile_Read(void *pUserData,void *pBuffer,ph7_int64 nDatatoRead)
{
	ssize_t nRd;
	nRd = read(SX_PTR_TO_INT(pUserData),pBuffer,(size_t)nDatatoRead);
	if( nRd < 1 ){
		/* EOF or IO error */
		return -1;
	}
	return (ph7_int64)nRd;
}
/* ph7_int64 (*xWrite)(void *,const void *,ph7_int64); */
static ph7_int64 UnixFile_Write(void *pUserData,const void *pBuffer,ph7_int64 nWrite)
{
	const char *zData = (const char *)pBuffer;
	int fd = SX_PTR_TO_INT(pUserData);
	ph7_int64 nCount;
	ssize_t nWr;
	nCount = 0;
	for(;;){
		if( nWrite < 1 ){
			break;
		}
		nWr = write(fd,zData,(size_t)nWrite);
		if( nWr < 1 ){
			/* IO error */
			break;
		}
		nWrite -= nWr;
		nCount += nWr;
		zData += nWr;
	}
	if( nWrite > 0 ){
		return -1;
	}
	return nCount;
}
/* int (*xSeek)(void *,ph7_int64,int) */
static int UnixFile_Seek(void *pUserData,ph7_int64 iOfft,int whence)
{
	off_t iNew;
	switch(whence){
	case 1:/*SEEK_CUR*/
		whence = SEEK_CUR;
		break;
	case 2: /* SEEK_END */
		whence = SEEK_END;
		break;
	case 0: /* SEEK_SET */
	default:
		whence = SEEK_SET;
		break;
	}
	iNew = lseek(SX_PTR_TO_INT(pUserData),(off_t)iOfft,whence);
	if( iNew < 0 ){
		return -1;
	}
	return PH7_OK;
}
/* int (*xLock)(void *,int) */
static int UnixFile_Lock(void *pUserData,int lock_type)
{
	int fd = SX_PTR_TO_INT(pUserData);
	int rc = PH7_OK; /* cc warning */
	if( lock_type < 0 ){
		/* Unlock the file */
		rc = flock(fd,LOCK_UN);
	}else{
		if( lock_type == 1 ){
			/* Exculsive lock */
			rc = flock(fd,LOCK_EX);
		}else{
			/* Shared lock */
			rc = flock(fd,LOCK_SH);
		}
	}
	return !rc ? PH7_OK : -1;
}
/* ph7_int64 (*xTell)(void *) */
static ph7_int64 UnixFile_Tell(void *pUserData)
{
	off_t iNew;
	iNew = lseek(SX_PTR_TO_INT(pUserData),0,SEEK_CUR);
	return (ph7_int64)iNew;
}
/* int (*xTrunc)(void *,ph7_int64) */
static int UnixFile_Trunc(void *pUserData,ph7_int64 nOfft)
{
	int rc;
	rc = ftruncate(SX_PTR_TO_INT(pUserData),(off_t)nOfft);
	if( rc != 0 ){
		return -1;
	}
	return PH7_OK;
}
/* int (*xSync)(void *); */
static int UnixFile_Sync(void *pUserData)
{
	int rc;	
	rc = fsync(SX_PTR_TO_INT(pUserData));
	return rc == 0 ? PH7_OK : - 1;
}
/* int (*xStat)(void *,ph7_value *,ph7_value *) */
static int UnixFile_Stat(void *pUserData,ph7_value *pArray,ph7_value *pWorker)
{
	struct stat st;
	int rc;
	rc = fstat(SX_PTR_TO_INT(pUserData),&st);
	if( rc != 0 ){ 
	 return -1;
	}
	/* dev */
	ph7_value_int64(pWorker,(ph7_int64)st.st_dev);
	ph7_array_add_strkey_elem(pArray,"dev",pWorker); /* Will make it's own copy */
	/* ino */
	ph7_value_int64(pWorker,(ph7_int64)st.st_ino);
	ph7_array_add_strkey_elem(pArray,"ino",pWorker); /* Will make it's own copy */
	/* mode */
	ph7_value_int(pWorker,(int)st.st_mode);
	ph7_array_add_strkey_elem(pArray,"mode",pWorker);
	/* nlink */
	ph7_value_int(pWorker,(int)st.st_nlink);
	ph7_array_add_strkey_elem(pArray,"nlink",pWorker); /* Will make it's own copy */
	/* uid,gid,rdev */
	ph7_value_int(pWorker,(int)st.st_uid);
	ph7_array_add_strkey_elem(pArray,"uid",pWorker);
	ph7_value_int(pWorker,(int)st.st_gid);
	ph7_array_add_strkey_elem(pArray,"gid",pWorker);
	ph7_value_int(pWorker,(int)st.st_rdev);
	ph7_array_add_strkey_elem(pArray,"rdev",pWorker);
	/* size */
	ph7_value_int64(pWorker,(ph7_int64)st.st_size);
	ph7_array_add_strkey_elem(pArray,"size",pWorker); /* Will make it's own copy */
	/* atime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_atime);
	ph7_array_add_strkey_elem(pArray,"atime",pWorker); /* Will make it's own copy */
	/* mtime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_mtime);
	ph7_array_add_strkey_elem(pArray,"mtime",pWorker); /* Will make it's own copy */
	/* ctime */
	ph7_value_int64(pWorker,(ph7_int64)st.st_ctime);
	ph7_array_add_strkey_elem(pArray,"ctime",pWorker); /* Will make it's own copy */
	/* blksize,blocks */
	ph7_value_int(pWorker,(int)st.st_blksize);		
	ph7_array_add_strkey_elem(pArray,"blksize",pWorker);
	ph7_value_int(pWorker,(int)st.st_blocks);
	ph7_array_add_strkey_elem(pArray,"blocks",pWorker);
	return PH7_OK;
}
/* Export the file:// stream */
static const ph7_io_stream sUnixFileStream = {
	"file", /* Stream name */
	PH7_IO_STREAM_VERSION,
	UnixFile_Open,  /* xOpen */
	UnixDir_Open,   /* xOpenDir */
	UnixFile_Close, /* xClose */
	UnixDir_Close,  /* xCloseDir */
	UnixFile_Read,  /* xRead */
	UnixDir_Read,   /* xReadDir */
	UnixFile_Write, /* xWrite */
	UnixFile_Seek,  /* xSeek */
	UnixFile_Lock,  /* xLock */
	UnixDir_Rewind, /* xRewindDir */
	UnixFile_Tell,  /* xTell */
	UnixFile_Trunc, /* xTrunc */
	UnixFile_Sync,  /* xSeek */
	UnixFile_Stat   /* xStat */
};
#endif /* __WINNT__/__UNIXES__ */
#endif /* PH7_DISABLE_DISK_IO */
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/* 
 * Export the builtin vfs.
 * Return a pointer to the builtin vfs if available.
 * Otherwise return the null_vfs [i.e: a no-op vfs] instead.
 * Note:
 *  The built-in vfs is always available for Windows/UNIX systems.
 * Note:
 *  If the engine is compiled with the PH7_DISABLE_DISK_IO/PH7_DISABLE_BUILTIN_FUNC
 *  directives defined then this function return the null_vfs instead.
 */
PH7_PRIVATE const ph7_vfs * PH7_ExportBuiltinVfs(void)
{
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifdef PH7_DISABLE_DISK_IO
	return &null_vfs;
#else
#ifdef __WINNT__
	return &sWinVfs;
#elif defined(__UNIXES__)
	return &sUnixVfs;
#else
	return &null_vfs;
#endif /* __WINNT__/__UNIXES__ */
#endif /*PH7_DISABLE_DISK_IO*/
#else
	return &null_vfs;
#endif /* PH7_DISABLE_BUILTIN_FUNC */
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_DISK_IO
/*
 * The following defines are mostly used by the UNIX built and have
 * no particular meaning on windows.
 */
#ifndef STDIN_FILENO
#define STDIN_FILENO	0
#endif
#ifndef STDOUT_FILENO
#define STDOUT_FILENO	1
#endif
#ifndef STDERR_FILENO
#define STDERR_FILENO	2
#endif
/*
 * php:// Accessing various I/O streams
 * According to the PHP langage reference manual
 * PHP provides a number of miscellaneous I/O streams that allow access to PHP's own input
 * and output streams, the standard input, output and error file descriptors.
 * php://stdin, php://stdout and php://stderr:
 *  Allow direct access to the corresponding input or output stream of the PHP process.
 *  The stream references a duplicate file descriptor, so if you open php://stdin and later
 *  close it, you close only your copy of the descriptor-the actual stream referenced by STDIN is unaffected.
 *  php://stdin is read-only, whereas php://stdout and php://stderr are write-only.
 * php://output
 *  php://output is a write-only stream that allows you to write to the output buffer 
 *  mechanism in the same way as print and echo. 
 */
typedef struct ph7_stream_data ph7_stream_data;
/* Supported IO streams */
#define PH7_IO_STREAM_STDIN  1 /* php://stdin */
#define PH7_IO_STREAM_STDOUT 2 /* php://stdout */
#define PH7_IO_STREAM_STDERR 3 /* php://stderr */
#define PH7_IO_STREAM_OUTPUT 4 /* php://output */
 /* The following structure is the private data associated with the php:// stream */
struct ph7_stream_data
{
	ph7_vm *pVm; /* VM that own this instance */
	int iType;   /* Stream type */
	union{
		void *pHandle; /* Stream handle */
		ph7_output_consumer sConsumer; /* VM output consumer */
	}x;
};
/*
 * Allocate a new instance of the ph7_stream_data structure.
 */
static ph7_stream_data * PHPStreamDataInit(ph7_vm *pVm,int iType)
{
	ph7_stream_data *pData;
	if( pVm == 0 ){
		return 0;
	}
	/* Allocate a new instance */
	pData = (ph7_stream_data *)SyMemBackendAlloc(&pVm->sAllocator,sizeof(ph7_stream_data));
	if( pData == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pData,sizeof(ph7_stream_data));
	/* Initialize fields */
	pData->iType = iType;
	if( iType == PH7_IO_STREAM_OUTPUT ){
		/* Point to the default VM consumer routine. */
		pData->x.sConsumer = pVm->sVmConsumer; 
	}else{
#ifdef __WINNT__
		DWORD nChannel;
		switch(iType){
		case PH7_IO_STREAM_STDOUT:	nChannel = STD_OUTPUT_HANDLE; break;
		case PH7_IO_STREAM_STDERR:  nChannel = STD_ERROR_HANDLE; break;
		default:
			nChannel = STD_INPUT_HANDLE; 
			break;
		}
		pData->x.pHandle = GetStdHandle(nChannel);
#else
		/* Assume an UNIX system */
		int ifd = STDIN_FILENO;
		switch(iType){
		case PH7_IO_STREAM_STDOUT:  ifd = STDOUT_FILENO; break;
		case PH7_IO_STREAM_STDERR:  ifd = STDERR_FILENO; break;
		default:
			break;
		}
		pData->x.pHandle = SX_INT_TO_PTR(ifd);
#endif
	}
	pData->pVm = pVm;
	return pData;
}
/* 
 * Implementation of the php:// IO streams routines
 * Authors:
 *  Symisc Systems,devel@symisc.net.
 *  Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *   Stable.
 */
/* int (*xOpen)(const char *,int,ph7_value *,void **) */
static int PHPStreamData_Open(const char *zName,int iMode,ph7_value *pResource,void ** ppHandle)
{
	ph7_stream_data *pData;
	SyString sStream;
	SyStringInitFromBuf(&sStream,zName,SyStrlen(zName));
	/* Trim leading and trailing white spaces */
	SyStringFullTrim(&sStream);
	/* Stream to open */
	if( SyStrnicmp(sStream.zString,"stdin",sizeof("stdin")-1) == 0 ){
		iMode = PH7_IO_STREAM_STDIN;
	}else if( SyStrnicmp(sStream.zString,"output",sizeof("output")-1) == 0 ){
		iMode = PH7_IO_STREAM_OUTPUT;
	}else if( SyStrnicmp(sStream.zString,"stdout",sizeof("stdout")-1) == 0 ){
		iMode = PH7_IO_STREAM_STDOUT;
	}else if( SyStrnicmp(sStream.zString,"stderr",sizeof("stderr")-1) == 0 ){
		iMode = PH7_IO_STREAM_STDERR;
	}else{
		/* unknown stream name */
		return -1;
	}
	/* Create our handle */
	pData = PHPStreamDataInit(pResource?pResource->pVm:0,iMode);
	if( pData == 0 ){
		return -1;
	}
	/* Make the handle public */
	*ppHandle = (void *)pData;
	return PH7_OK;
}
/* ph7_int64 (*xRead)(void *,void *,ph7_int64) */
static ph7_int64 PHPStreamData_Read(void *pHandle,void *pBuffer,ph7_int64 nDatatoRead)
{
	ph7_stream_data *pData = (ph7_stream_data *)pHandle;
	if( pData == 0 ){
		return -1;
	}
	if( pData->iType != PH7_IO_STREAM_STDIN ){
		/* Forbidden */
		return -1;
	}
#ifdef __WINNT__
	{
		DWORD nRd;
		BOOL rc;
		rc = ReadFile(pData->x.pHandle,pBuffer,(DWORD)nDatatoRead,&nRd,0);
		if( !rc ){
			/* IO error */
			return -1;
		}
		return (ph7_int64)nRd;
	}
#elif defined(__UNIXES__)
	{
		ssize_t nRd;
		int fd;
		fd = SX_PTR_TO_INT(pData->x.pHandle);
		nRd = read(fd,pBuffer,(size_t)nDatatoRead);
		if( nRd < 1 ){
			return -1;
		}
		return (ph7_int64)nRd;
	}
#else
	return -1;
#endif
}
/* ph7_int64 (*xWrite)(void *,const void *,ph7_int64) */
static ph7_int64 PHPStreamData_Write(void *pHandle,const void *pBuf,ph7_int64 nWrite)
{
	ph7_stream_data *pData = (ph7_stream_data *)pHandle;
	if( pData == 0 ){
		return -1;
	}
	if( pData->iType == PH7_IO_STREAM_STDIN ){
		/* Forbidden */
		return -1;
	}else if( pData->iType == PH7_IO_STREAM_OUTPUT ){
		ph7_output_consumer *pCons = &pData->x.sConsumer;
		int rc;
		/* Call the vm output consumer */
		rc = pCons->xConsumer(pBuf,(unsigned int)nWrite,pCons->pUserData);
		if( rc == PH7_ABORT ){
			return -1;
		}
		return nWrite;
	}
#ifdef __WINNT__
	{
		DWORD nWr;
		BOOL rc;
		rc = WriteFile(pData->x.pHandle,pBuf,(DWORD)nWrite,&nWr,0);
		if( !rc ){
			/* IO error */
			return -1;
		}
		return (ph7_int64)nWr;
	}
#elif defined(__UNIXES__)
	{
		ssize_t nWr;
		int fd;
		fd = SX_PTR_TO_INT(pData->x.pHandle);
		nWr = write(fd,pBuf,(size_t)nWrite);
		if( nWr < 1 ){
			return -1;
		}
		return (ph7_int64)nWr;
	}
#else
	return -1;
#endif
}
/* void (*xClose)(void *) */
static void PHPStreamData_Close(void *pHandle)
{
	ph7_stream_data *pData = (ph7_stream_data *)pHandle;
	ph7_vm *pVm;
	if( pData == 0 ){
		return;
	}
	pVm = pData->pVm;
	/* Free the instance */
	SyMemBackendFree(&pVm->sAllocator,pData);
}
/* Export the php:// stream */
static const ph7_io_stream sPHP_Stream = {
	"php",
	PH7_IO_STREAM_VERSION,
	PHPStreamData_Open,  /* xOpen */
	0,   /* xOpenDir */
	PHPStreamData_Close, /* xClose */
	0,  /* xCloseDir */
	PHPStreamData_Read,  /* xRead */
	0,  /* xReadDir */
	PHPStreamData_Write, /* xWrite */
	0,  /* xSeek */
	0,  /* xLock */
	0,  /* xRewindDir */
	0,  /* xTell */
	0,  /* xTrunc */
	0,  /* xSeek */
	0   /* xStat */
};
#endif /* PH7_DISABLE_DISK_IO */
/*
 * Return TRUE if we are dealing with the php:// stream.
 * FALSE otherwise.
 */
static int is_php_stream(const ph7_io_stream *pStream)
{
#ifndef PH7_DISABLE_DISK_IO
	return pStream == &sPHP_Stream;
#else
	SXUNUSED(pStream); /* cc warning */
	return 0;
#endif /* PH7_DISABLE_DISK_IO */
}

#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * Export the IO routines defined above and the built-in IO streams
 * [i.e: file://,php://].
 * Note:
 *  If the engine is compiled with the PH7_DISABLE_BUILTIN_FUNC directive
 *  defined then this function is a no-op.
 */
PH7_PRIVATE sxi32 PH7_RegisterIORoutine(ph7_vm *pVm)
{
#ifndef PH7_DISABLE_BUILTIN_FUNC
	      /* VFS functions */
	static const ph7_builtin_func aVfsFunc[] = {
		{"chdir",   PH7_vfs_chdir   },
		{"chroot",  PH7_vfs_chroot  },
		{"getcwd",  PH7_vfs_getcwd  },
		{"rmdir",   PH7_vfs_rmdir   },
		{"is_dir",  PH7_vfs_is_dir  },
		{"mkdir",   PH7_vfs_mkdir   },
		{"rename",  PH7_vfs_rename  },
		{"realpath",PH7_vfs_realpath},
		{"sleep",   PH7_vfs_sleep   },
		{"usleep",  PH7_vfs_usleep  },
		{"unlink",  PH7_vfs_unlink  },
		{"delete",  PH7_vfs_unlink  },
		{"chmod",   PH7_vfs_chmod   },
		{"chown",   PH7_vfs_chown   },
		{"chgrp",   PH7_vfs_chgrp   },
		{"disk_free_space",PH7_vfs_disk_free_space  },
		{"diskfreespace",  PH7_vfs_disk_free_space  },
		{"disk_total_space",PH7_vfs_disk_total_space},
		{"file_exists", PH7_vfs_file_exists },
		{"filesize",    PH7_vfs_file_size   },
		{"fileatime",   PH7_vfs_file_atime  },
		{"filemtime",   PH7_vfs_file_mtime  },
		{"filectime",   PH7_vfs_file_ctime  },
		{"is_file",     PH7_vfs_is_file  },
		{"is_link",     PH7_vfs_is_link  },
		{"is_readable", PH7_vfs_is_readable   },
		{"is_writable", PH7_vfs_is_writable   },
		{"is_executable",PH7_vfs_is_executable},
		{"filetype",    PH7_vfs_filetype },
		{"stat",        PH7_vfs_stat     },
		{"lstat",       PH7_vfs_lstat    },
		{"getenv",      PH7_vfs_getenv   },
		{"setenv",      PH7_vfs_putenv   },
		{"putenv",      PH7_vfs_putenv   },
		{"touch",       PH7_vfs_touch    },
		{"link",        PH7_vfs_link     },
		{"symlink",     PH7_vfs_symlink  },
		{"umask",       PH7_vfs_umask    },
		{"sys_get_temp_dir", PH7_vfs_sys_get_temp_dir },
		{"get_current_user", PH7_vfs_get_current_user },
		{"getmypid",    PH7_vfs_getmypid },
		{"getpid",      PH7_vfs_getmypid },
		{"getmyuid",    PH7_vfs_getmyuid },
		{"getuid",      PH7_vfs_getmyuid },
		{"getmygid",    PH7_vfs_getmygid },
		{"getgid",      PH7_vfs_getmygid },
		{"ph7_uname",   PH7_vfs_ph7_uname},
		{"php_uname",   PH7_vfs_ph7_uname},
		     /* Path processing */ 
		{"dirname",     PH7_builtin_dirname  },
		{"basename",    PH7_builtin_basename },
		{"pathinfo",    PH7_builtin_pathinfo },
		{"strglob",     PH7_builtin_strglob  },
		{"fnmatch",     PH7_builtin_fnmatch  },
		     /* ZIP processing */
		{"zip_open",    PH7_builtin_zip_open },
		{"zip_close",   PH7_builtin_zip_close},
		{"zip_read",    PH7_builtin_zip_read },
		{"zip_entry_open", PH7_builtin_zip_entry_open },
		{"zip_entry_close",PH7_builtin_zip_entry_close},
		{"zip_entry_name", PH7_builtin_zip_entry_name },
		{"zip_entry_filesize",      PH7_builtin_zip_entry_filesize       },
		{"zip_entry_compressedsize",PH7_builtin_zip_entry_compressedsize },
		{"zip_entry_read", PH7_builtin_zip_entry_read },
		{"zip_entry_reset_read_cursor",PH7_builtin_zip_entry_reset_read_cursor},
		{"zip_entry_compressionmethod",PH7_builtin_zip_entry_compressionmethod}
	};
	    /* IO stream functions */
	static const ph7_builtin_func aIOFunc[] = {
		{"ftruncate", PH7_builtin_ftruncate },
		{"fseek",     PH7_builtin_fseek  },
		{"ftell",     PH7_builtin_ftell  },
		{"rewind",    PH7_builtin_rewind },
		{"fflush",    PH7_builtin_fflush },
		{"feof",      PH7_builtin_feof   },
		{"fgetc",     PH7_builtin_fgetc  },
		{"fgets",     PH7_builtin_fgets  },
		{"fread",     PH7_builtin_fread  },
		{"fgetcsv",   PH7_builtin_fgetcsv},
		{"fgetss",    PH7_builtin_fgetss },
		{"readdir",   PH7_builtin_readdir},
		{"rewinddir", PH7_builtin_rewinddir },
		{"closedir",  PH7_builtin_closedir},
		{"opendir",   PH7_builtin_opendir },
		{"readfile",  PH7_builtin_readfile},
		{"file_get_contents", PH7_builtin_file_get_contents},
		{"file_put_contents", PH7_builtin_file_put_contents}, 
		{"file",      PH7_builtin_file   },
		{"copy",      PH7_builtin_copy   },
		{"fstat",     PH7_builtin_fstat  },
		{"fwrite",    PH7_builtin_fwrite },
		{"fputs",     PH7_builtin_fwrite },
		{"flock",     PH7_builtin_flock  },
		{"fclose",    PH7_builtin_fclose },
		{"fopen",     PH7_builtin_fopen  },
		{"fpassthru", PH7_builtin_fpassthru },
		{"fputcsv",   PH7_builtin_fputcsv },
		{"fprintf",   PH7_builtin_fprintf },
#if !defined(PH7_DISABLE_HASH_FUNC)
		{"md5_file",  PH7_builtin_md5_file},
		{"sha1_file", PH7_builtin_sha1_file},
#endif /* PH7_DISABLE_HASH_FUNC */
		{"parse_ini_file", PH7_builtin_parse_ini_file},
		{"vfprintf",  PH7_builtin_vfprintf}
	};
	const ph7_io_stream *pFileStream = 0;
	sxu32 n = 0;
	/* Register the functions defined above */
	for( n = 0 ; n < SX_ARRAYSIZE(aVfsFunc) ; ++n ){
		ph7_create_function(&(*pVm),aVfsFunc[n].zName,aVfsFunc[n].xFunc,(void *)pVm->pEngine->pVfs);
	}
	for( n = 0 ; n < SX_ARRAYSIZE(aIOFunc) ; ++n ){
		ph7_create_function(&(*pVm),aIOFunc[n].zName,aIOFunc[n].xFunc,pVm);
	}
#ifndef PH7_DISABLE_DISK_IO
	/* Register the file stream if available */
#ifdef __WINNT__
	pFileStream = &sWinFileStream;
#elif defined(__UNIXES__)
	pFileStream = &sUnixFileStream;
#endif
	/* Install the php:// stream */
	ph7_vm_config(pVm,PH7_VM_CONFIG_IO_STREAM,&sPHP_Stream);
#endif /* PH7_DISABLE_DISK_IO */
	if( pFileStream ){
		/* Install the file:// stream */
		ph7_vm_config(pVm,PH7_VM_CONFIG_IO_STREAM,pFileStream);
	}
#else
   SXUNUSED(pVm); /* cc warning */
#endif /* PH7_DISABLE_BUILTIN_FUNC */
	return SXRET_OK;
}
/*
 * Export the STDIN handle.
 */
PH7_PRIVATE void * PH7_ExportStdin(ph7_vm *pVm)
{
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_DISK_IO
	if( pVm->pStdin == 0  ){
		io_private *pIn;
		/* Allocate an IO private instance */
		pIn = (io_private *)SyMemBackendAlloc(&pVm->sAllocator,sizeof(io_private));
		if( pIn == 0 ){
			return 0;
		}
		InitIOPrivate(pVm,&sPHP_Stream,pIn);
		/* Initialize the handle */
		pIn->pHandle = PHPStreamDataInit(pVm,PH7_IO_STREAM_STDIN);
		/* Install the STDIN stream */
		pVm->pStdin = pIn;
		return pIn;
	}else{
		/* NULL or STDIN */
		return pVm->pStdin;
	}
#else
	return 0;
#endif
#else
	SXUNUSED(pVm); /* cc warning */
	return 0;
#endif
}
/*
 * Export the STDOUT handle.
 */
PH7_PRIVATE void * PH7_ExportStdout(ph7_vm *pVm)
{
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_DISK_IO
	if( pVm->pStdout == 0  ){
		io_private *pOut;
		/* Allocate an IO private instance */
		pOut = (io_private *)SyMemBackendAlloc(&pVm->sAllocator,sizeof(io_private));
		if( pOut == 0 ){
			return 0;
		}
		InitIOPrivate(pVm,&sPHP_Stream,pOut);
		/* Initialize the handle */
		pOut->pHandle = PHPStreamDataInit(pVm,PH7_IO_STREAM_STDOUT);
		/* Install the STDOUT stream */
		pVm->pStdout = pOut;
		return pOut;
	}else{
		/* NULL or STDOUT */
		return pVm->pStdout;
	}
#else
	return 0;
#endif
#else
	SXUNUSED(pVm); /* cc warning */
	return 0;
#endif
}
/*
 * Export the STDERR handle.
 */
PH7_PRIVATE void * PH7_ExportStderr(ph7_vm *pVm)
{
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_DISK_IO
	if( pVm->pStderr == 0  ){
		io_private *pErr;
		/* Allocate an IO private instance */
		pErr = (io_private *)SyMemBackendAlloc(&pVm->sAllocator,sizeof(io_private));
		if( pErr == 0 ){
			return 0;
		}
		InitIOPrivate(pVm,&sPHP_Stream,pErr);
		/* Initialize the handle */
		pErr->pHandle = PHPStreamDataInit(pVm,PH7_IO_STREAM_STDERR);
		/* Install the STDERR stream */
		pVm->pStderr = pErr;
		return pErr;
	}else{
		/* NULL or STDERR */
		return pVm->pStderr;
	}
#else
	return 0;
#endif
#else
	SXUNUSED(pVm); /* cc warning */
	return 0;
#endif
}

/*
 * ----------------------------------------------------------
 * File: parse.c
 * MD5: 56ca16eaf7ac65c2fd5a9a8b67345f21
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: parse.c v3.7 FreeBSD 2011-12-20 22:46 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/*
 * This file implement a hand-coded, thread-safe, full-reentrant and highly-efficient
 * expression parser for the PH7 engine.
 * Besides from the one introudced by PHP (Over 60), the PH7 engine have introduced three new
 * operators. These are 'eq', 'ne' and the comma operator ','.
 * The eq and ne operators are borrowed from the Perl world. They are used for strict
 * string comparison. The reason why they have been implemented in the PH7 engine
 * and introduced as an extension to the PHP programming language is due to the confusion
 * introduced by the standard PHP comparison operators ('==' or '===') especially if you
 * are comparing strings with numbers.
 * Take the following example: 
 * var_dump( 0xFF == '255' ); // bool(true) ???
 * // use the type equal operator by adding a single space to one of the operand
 * var_dump( '255  ' === '255' ); //bool(true) depending on the PHP version
 * That is, if one of the operand looks like a number (either integer or float) then PHP
 * will internally convert the two operands to numbers and then a numeric comparison is performed.
 * This is what the PHP language reference manual says:
 * If you compare a number with a string or the comparison involves numerical strings, then each
 * string is converted to a number and the comparison performed numerically. 
 * Bummer, if you ask me,this is broken, badly broken. I mean,the programmer cannot dictate
 * it's comparison rule, it's the underlying engine who decides in it's place and perform
 * the internal conversion. In most cases,PHP developers wants simple string comparison and they
 * are stuck to use the ugly and inefficient strcmp() function and it's variants instead.
 * This is the big reason why we have introduced these two operators.
 * The eq operator is used to compare two strings byte per byte. If you came from the C/C++ world
 * think of this operator as a barebone implementation of the memcmp() C standard library function.
 * Keep in mind that if you are comparing two ASCII strings then the capital letters and their lowercase
 * letters are completely different and so this example will output false.
 * var_dump('allo' eq 'Allo'); //bool(FALSE)
 * The ne operator perform the opposite operation of the eq operator and is used to test for string
 * inequality. This example will output true
 * var_dump('allo' ne 'Allo'); //bool(TRUE) unequal strings
 * The eq operator return a Boolean true if and only if the two strings are identical while the
 * ne operator return a Boolean true if and only if the two strings are different. Otherwise
 * a Boolean false is returned (equal strings).
 * Note that the comparison is performed only if the two strings are of the same length.
 * Otherwise the eq and ne operators return a Boolean false without performing any comparison
 * and avoid us wasting CPU time for nothing.
 * Again remember that we talk about a low level byte per byte comparison and nothing else.
 * Also remember that zero length strings are always equal.
 *
 * Again, another powerful mechanism borrowed from the C/C++ world and introduced as an extension
 * to the PHP programming language.
 * A comma expression contains two operands of any type separated by a comma and has left-to-right
 * associativity. The left operand is fully evaluated, possibly producing side effects, and its
 * value, if there is one, is discarded. The right operand is then evaluated. The type and value
 * of the result of a comma expression are those of its right operand, after the usual unary conversions. 
 * Any number of expressions separated by commas can form a single expression because the comma operator
 * is associative. The use of the comma operator guarantees that the sub-expressions will be evaluated
 * in left-to-right order, and the value of the last becomes the value of the entire expression.
 * The following example assign the value 25 to the variable $a, multiply the value of $a with 2
 * and assign the result to variable $b and finally we call a test function to output the value
 * of $a and $b. Keep-in mind that all theses operations are done in a single expression using
 * the comma operator to create side effect.
 * $a = 25,$b = $a << 1 ,test();
 * //Output the value of $a and $b 
 * function test(){
 *	 global $a,$b;
 *	 echo "\$a = $a \$b= $b\n"; // You should see: $a = 25 $b = 50
 * }
 *
 * For a full discussions on these extensions, please refer to  offical
 * documentation(http://ph7.symisc.net/features.html) or visit the offical forums
 * (http://forums.symisc.net/) if you want to share your point of view.
 *
 * Exprressions: According to the PHP language reference manual
 *
 * Expressions are the most important building stones of PHP. In PHP, almost anything you write is an expression.
 * The simplest yet most accurate way to define an expression is "anything that has a value".
 * The most basic forms of expressions are constants and variables. When you type "$a = 5", you're assigning
 * '5' into $a. '5', obviously, has the value 5, or in other words '5' is an expression with the value of 5
 * (in this case, '5' is an integer constant).
 * After this assignment, you'd expect $a's value to be 5 as well, so if you wrote $b = $a, you'd expect
 * it to behave just as if you wrote $b = 5. In other words, $a is an expression with the value of 5 as well.
 * If everything works right, this is exactly what will happen.
 * Slightly more complex examples for expressions are functions. For instance, consider the following function:
 * <?php
 * function foo ()
 * {
 *   return 5;
 * }
 * ?>
 * Assuming you're familiar with the concept of functions (if you're not, take a look at the chapter about functions)
 * you'd assume that typing $c = foo() is essentially just like writing $c = 5, and you're right.
 * Functions are expressions with the value of their return value. Since foo() returns 5, the value of the expression
 * 'foo()' is 5. Usually functions don't just return a static value but compute something.
 * Of course, values in PHP don't have to be integers, and very often they aren't.
 * PHP supports four scalar value types: integer values, floating point values (float), string values and boolean values
 * (scalar values are values that you can't 'break' into smaller pieces, unlike arrays, for instance).
 * PHP also supports two composite (non-scalar) types: arrays and objects. Each of these value types can be assigned
 * into variables or returned from functions.
 * PHP takes expressions much further, in the same way many other languages do. PHP is an expression-oriented language
 * in the sense that almost everything is an expression. Consider the example we've already dealt with, '$a = 5'.
 * It's easy to see that there are two values involved here, the value of the integer constant '5', and the value 
 * of $a which is being updated to 5 as well. But the truth is that there's one additional value involved here
 * and that's the value of the assignment itself. The assignment itself evaluates to the assigned value, in this case 5.
 * In practice, it means that '$a = 5', regardless of what it does, is an expression with the value 5. Thus, writing 
 * something like '$b = ($a = 5)' is like writing '$a = 5; $b = 5;' (a semicolon marks the end of a statement).
 * Since assignments are parsed in a right to left order, you can also write '$b = $a = 5'.
 * Another good example of expression orientation is pre- and post-increment and decrement.
 * Users of PHP and many other languages may be familiar with the notation of variable++ and variable--.
 * These are increment and decrement operators. In PHP, like in C, there are two types of increment - pre-increment
 * and post-increment. Both pre-increment and post-increment essentially increment the variable, and the effect
 * on the variable is identical. The difference is with the value of the increment expression. Pre-increment, which is written
 * '++$variable', evaluates to the incremented value (PHP increments the variable before reading its value, thus the name 'pre-increment').
 * Post-increment, which is written '$variable++' evaluates to the original value of $variable, before it was incremented 
 * (PHP increments the variable after reading its value, thus the name 'post-increment').
 * A very common type of expressions are comparison expressions. These expressions evaluate to either FALSE or TRUE.
 * PHP supports > (bigger than), >= (bigger than or equal to), == (equal), != (not equal), < (smaller than) and <= (smaller than or equal to).
 * The language also supports a set of strict equivalence operators: === (equal to and same type) and !== (not equal to or not same type).
 * These expressions are most commonly used inside conditional execution, such as if statements.
 * The last example of expressions we'll deal with here is combined operator-assignment expressions.
 * You already know that if you want to increment $a by 1, you can simply write '$a++' or '++$a'.
 * But what if you want to add more than one to it, for instance 3? You could write '$a++' multiple times, but this is obviously not a very
 * efficient or comfortable way. A much more common practice is to write '$a = $a + 3'. '$a + 3' evaluates to the value of $a plus 3
 * and is assigned back into $a, which results in incrementing $a by 3. In PHP, as in several other languages like C, you can write
 * this in a shorter way, which with time would become clearer and quicker to understand as well. Adding 3 to the current value of $a
 * can be written '$a += 3'. This means exactly "take the value of $a, add 3 to it, and assign it back into $a".
 * In addition to being shorter and clearer, this also results in faster execution. The value of '$a += 3', like the value of a regular
 * assignment, is the assigned value. Notice that it is NOT 3, but the combined value of $a plus 3 (this is the value that's assigned into $a).
 * Any two-place operator can be used in this operator-assignment mode, for example '$a -= 5' (subtract 5 from the value of $a), '$b *= 7'
 * (multiply the value of $b by 7), etc.
 * There is one more expression that may seem odd if you haven't seen it in other languages, the ternary conditional operator:
 * <?php
 * $first ? $second : $third
 * ?>
 * If the value of the first subexpression is TRUE (non-zero), then the second subexpression is evaluated, and that is the result
 * of the conditional expression. Otherwise, the third subexpression is evaluated, and that is the value. 
 */
/* Operators associativity */
#define EXPR_OP_ASSOC_LEFT   0x01 /* Left associative operator */
#define EXPR_OP_ASSOC_RIGHT  0x02 /* Right associative operator */
#define EXPR_OP_NON_ASSOC    0x04 /* Non-associative operator */
/* 
 * Operators table
 * This table is sorted by operators priority (highest to lowest) according
 * the PHP language reference manual.
 * PH7 implements all the 60 PHP operators and have introduced the eq and ne operators.
 * The operators precedence table have been improved dramatically so that you can do same
 * amazing things now such as array dereferencing,on the fly function call,anonymous function
 * as array values,class member access on instantiation and so on.
 * Refer to the following page for a full discussion on these improvements:
 * http://ph7.symisc.net/features.html#improved_precedence
 */
static const ph7_expr_op aOpTable[] = {
	/* Precedence 1: non-associative */
	{ {"new",sizeof("new")-1},     EXPR_OP_NEW,   1, EXPR_OP_NON_ASSOC, PH7_OP_NEW  },
	{ {"clone",sizeof("clone")-1}, EXPR_OP_CLONE, 1, EXPR_OP_NON_ASSOC, PH7_OP_CLONE},
	                              /* Postfix operators */
	/* Precedence 2(Highest),left-associative */
	{ {"->",sizeof(char)*2}, EXPR_OP_ARROW,     2, EXPR_OP_ASSOC_LEFT , PH7_OP_MEMBER},
	{ {"::",sizeof(char)*2}, EXPR_OP_DC,        2, EXPR_OP_ASSOC_LEFT , PH7_OP_MEMBER},
	{ {"[",sizeof(char)},    EXPR_OP_SUBSCRIPT, 2, EXPR_OP_ASSOC_LEFT , PH7_OP_LOAD_IDX},
	/* Precedence 3,non-associative  */
	{ {"++",sizeof(char)*2}, EXPR_OP_INCR, 3, EXPR_OP_NON_ASSOC , PH7_OP_INCR},
	{ {"--",sizeof(char)*2}, EXPR_OP_DECR, 3, EXPR_OP_NON_ASSOC , PH7_OP_DECR},
	                              /* Unary operators */
	/* Precedence 4,right-associative  */
	{ {"-",sizeof(char)},                 EXPR_OP_UMINUS,    4, EXPR_OP_ASSOC_RIGHT, PH7_OP_UMINUS },
	{ {"+",sizeof(char)},                 EXPR_OP_UPLUS,     4, EXPR_OP_ASSOC_RIGHT, PH7_OP_UPLUS },
	{ {"~",sizeof(char)},                 EXPR_OP_BITNOT,    4, EXPR_OP_ASSOC_RIGHT, PH7_OP_BITNOT },
	{ {"!",sizeof(char)},                 EXPR_OP_LOGNOT,    4, EXPR_OP_ASSOC_RIGHT, PH7_OP_LNOT },
	{ {"@",sizeof(char)},                 EXPR_OP_ALT,       4, EXPR_OP_ASSOC_RIGHT, PH7_OP_ERR_CTRL},
	                             /* Cast operators */
	{ {"(int)",    sizeof("(int)")-1   }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_INT  },
	{ {"(bool)",   sizeof("(bool)")-1  }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_BOOL },
	{ {"(string)", sizeof("(string)")-1}, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_STR  },
	{ {"(float)",  sizeof("(float)")-1 }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_REAL },
	{ {"(array)",  sizeof("(array)")-1 }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_ARRAY},
	{ {"(object)", sizeof("(object)")-1}, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_OBJ  },
	{ {"(unset)",  sizeof("(unset)")-1 }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_NULL },
	                           /* Binary operators */
	/* Precedence 7,left-associative */
	{ {"instanceof",sizeof("instanceof")-1}, EXPR_OP_INSTOF, 7, EXPR_OP_NON_ASSOC, PH7_OP_IS_A},
	{ {"*",sizeof(char)}, EXPR_OP_MUL, 7, EXPR_OP_ASSOC_LEFT , PH7_OP_MUL},
	{ {"/",sizeof(char)}, EXPR_OP_DIV, 7, EXPR_OP_ASSOC_LEFT , PH7_OP_DIV},
	{ {"%",sizeof(char)}, EXPR_OP_MOD, 7, EXPR_OP_ASSOC_LEFT , PH7_OP_MOD},
	/* Precedence 8,left-associative */
	{ {"+",sizeof(char)}, EXPR_OP_ADD, 8,  EXPR_OP_ASSOC_LEFT, PH7_OP_ADD},
	{ {"-",sizeof(char)}, EXPR_OP_SUB, 8,  EXPR_OP_ASSOC_LEFT, PH7_OP_SUB},
	{ {".",sizeof(char)}, EXPR_OP_DOT, 8,  EXPR_OP_ASSOC_LEFT, PH7_OP_CAT},
	/* Precedence 9,left-associative */
	{ {"<<",sizeof(char)*2}, EXPR_OP_SHL, 9, EXPR_OP_ASSOC_LEFT, PH7_OP_SHL},
	{ {">>",sizeof(char)*2}, EXPR_OP_SHR, 9, EXPR_OP_ASSOC_LEFT, PH7_OP_SHR},
	/* Precedence 10,non-associative */
	{ {"<",sizeof(char)},    EXPR_OP_LT,  10, EXPR_OP_NON_ASSOC, PH7_OP_LT},
	{ {">",sizeof(char)},    EXPR_OP_GT,  10, EXPR_OP_NON_ASSOC, PH7_OP_GT},
	{ {"<=",sizeof(char)*2}, EXPR_OP_LE,  10, EXPR_OP_NON_ASSOC, PH7_OP_LE},
	{ {">=",sizeof(char)*2}, EXPR_OP_GE,  10, EXPR_OP_NON_ASSOC, PH7_OP_GE},
	{ {"<>",sizeof(char)*2}, EXPR_OP_NE,  10, EXPR_OP_NON_ASSOC, PH7_OP_NEQ},
	/* Precedence 11,non-associative */
	{ {"==",sizeof(char)*2},  EXPR_OP_EQ,  11, EXPR_OP_NON_ASSOC, PH7_OP_EQ},
	{ {"!=",sizeof(char)*2},  EXPR_OP_NE,  11, EXPR_OP_NON_ASSOC, PH7_OP_NEQ},
	{ {"eq",sizeof(char)*2},  EXPR_OP_SEQ, 11, EXPR_OP_NON_ASSOC, PH7_OP_SEQ}, /* IMP-0137-EQ: Symisc eXtension */
	{ {"ne",sizeof(char)*2},  EXPR_OP_SNE, 11, EXPR_OP_NON_ASSOC, PH7_OP_SNE}, /* IMP-0138-NE: Symisc eXtension */
	{ {"===",sizeof(char)*3}, EXPR_OP_TEQ, 11, EXPR_OP_NON_ASSOC, PH7_OP_TEQ},
	{ {"!==",sizeof(char)*3}, EXPR_OP_TNE, 11, EXPR_OP_NON_ASSOC, PH7_OP_TNE},
	/* Precedence 12,left-associative */
	{ {"&",sizeof(char)}, EXPR_OP_BAND, 12, EXPR_OP_ASSOC_LEFT, PH7_OP_BAND},
	/* Precedence 12,left-associative */
	{ {"=&",sizeof(char)*2}, EXPR_OP_REF, 12, EXPR_OP_ASSOC_LEFT, PH7_OP_STORE_REF},
	                         /* Binary operators */
	/* Precedence 13,left-associative */
	{ {"^",sizeof(char)}, EXPR_OP_XOR,13, EXPR_OP_ASSOC_LEFT, PH7_OP_BXOR},
	/* Precedence 14,left-associative */
	{ {"|",sizeof(char)}, EXPR_OP_BOR,14, EXPR_OP_ASSOC_LEFT, PH7_OP_BOR},
	/* Precedence 15,left-associative */
	{ {"&&",sizeof(char)*2}, EXPR_OP_LAND,15, EXPR_OP_ASSOC_LEFT, PH7_OP_LAND},
	/* Precedence 16,left-associative */
	{ {"||",sizeof(char)*2}, EXPR_OP_LOR, 16, EXPR_OP_ASSOC_LEFT, PH7_OP_LOR},
	                      /* Ternary operator */
	/* Precedence 17,left-associative */
    { {"?",sizeof(char)}, EXPR_OP_QUESTY, 17, EXPR_OP_ASSOC_LEFT, 0},
	                     /* Combined binary operators */
	/* Precedence 18,right-associative */
	{ {"=",sizeof(char)},     EXPR_OP_ASSIGN,     18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_STORE},
	{ {"+=",sizeof(char)*2},  EXPR_OP_ADD_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_ADD_STORE },
	{ {"-=",sizeof(char)*2},  EXPR_OP_SUB_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_SUB_STORE },
	{ {".=",sizeof(char)*2},  EXPR_OP_DOT_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_CAT_STORE },
	{ {"*=",sizeof(char)*2},  EXPR_OP_MUL_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_MUL_STORE },
	{ {"/=",sizeof(char)*2},  EXPR_OP_DIV_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_DIV_STORE },
	{ {"%=",sizeof(char)*2},  EXPR_OP_MOD_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_MOD_STORE },
	{ {"&=",sizeof(char)*2},  EXPR_OP_AND_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_BAND_STORE },
	{ {"|=",sizeof(char)*2},  EXPR_OP_OR_ASSIGN,  18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_BOR_STORE  },
	{ {"^=",sizeof(char)*2},  EXPR_OP_XOR_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_BXOR_STORE },
	{ {"<<=",sizeof(char)*3}, EXPR_OP_SHL_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_SHL_STORE },
	{ {">>=",sizeof(char)*3}, EXPR_OP_SHR_ASSIGN, 18,  EXPR_OP_ASSOC_RIGHT, PH7_OP_SHR_STORE },
	/* Precedence 19,left-associative */
	{ {"and",sizeof("and")-1},   EXPR_OP_LAND, 19, EXPR_OP_ASSOC_LEFT, PH7_OP_LAND},
	/* Precedence 20,left-associative */
	{ {"xor", sizeof("xor") -1}, EXPR_OP_LXOR, 20, EXPR_OP_ASSOC_LEFT, PH7_OP_LXOR},
	/* Precedence 21,left-associative */
	{ {"or",sizeof("or")-1},     EXPR_OP_LOR,  21, EXPR_OP_ASSOC_LEFT, PH7_OP_LOR},
	/* Precedence 22,left-associative [Lowest operator] */
	{ {",",sizeof(char)},        EXPR_OP_COMMA,22, EXPR_OP_ASSOC_LEFT, 0}, /* IMP-0139-COMMA: Symisc eXtension */
};
/* Function call operator need special handling */
static const ph7_expr_op sFCallOp = {{"(",sizeof(char)}, EXPR_OP_FUNC_CALL, 2, EXPR_OP_ASSOC_LEFT , PH7_OP_CALL};
/*
 * Check if the given token is a potential operator or not.
 * This function is called by the lexer each time it extract a token that may 
 * look like an operator.
 * Return a structure [i.e: ph7_expr_op instnace ] that describe the operator on success.
 * Otherwise NULL.
 * Note that the function take care of handling ambiguity [i.e: whether we are dealing with
 * a binary minus or unary minus.]
 */
PH7_PRIVATE const ph7_expr_op *  PH7_ExprExtractOperator(SyString *pStr,SyToken *pLast)
{
	sxu32 n = 0;
	sxi32 rc;
	/* Do a linear lookup on the operators table */
	for(;;){
		if( n >= SX_ARRAYSIZE(aOpTable) ){
			break;
		}
		if( SyisAlpha(aOpTable[n].sOp.zString[0]) ){
			/* TICKET 1433-012: Alpha stream operators [i.e: and,or,xor,new...] */
			rc = SyStringCmp(pStr,&aOpTable[n].sOp,SyStrnicmp);
		}else{
			rc = SyStringCmp(pStr,&aOpTable[n].sOp,SyMemcmp);
		}
		if( rc == 0 ){
			if( aOpTable[n].sOp.nByte != sizeof(char) || (aOpTable[n].iOp != EXPR_OP_UMINUS && aOpTable[n].iOp != EXPR_OP_UPLUS) || pLast == 0 ){
				/* There is no ambiguity here,simply return the first operator seen */
				return &aOpTable[n];
			}
			/* Handle ambiguity */
			if( pLast->nType & (PH7_TK_LPAREN/*'('*/|PH7_TK_OCB/*'{'*/|PH7_TK_OSB/*'['*/|PH7_TK_COLON/*:*/|PH7_TK_COMMA/*,'*/) ){
				/* Unary opertors have prcedence here over binary operators */
				return &aOpTable[n];
			}
			if( pLast->nType & PH7_TK_OP ){
				const ph7_expr_op *pOp = (const ph7_expr_op *)pLast->pUserData;
				/* Ticket 1433-31: Handle the '++','--' operators case */
				if( pOp->iOp != EXPR_OP_INCR && pOp->iOp != EXPR_OP_DECR ){
					/* Unary opertors have prcedence here over binary operators */
					return &aOpTable[n];
				}
			
			}
		}
		++n; /* Next operator in the table */
	}
	/* No such operator */
	return 0;
}
/*
 * Delimit a set of token stream.
 * This function take care of handling the nesting level and stops when it hit
 * the end of the input or the ending token is found and the nesting level is zero.
 */
PH7_PRIVATE void PH7_DelimitNestedTokens(SyToken *pIn,SyToken *pEnd,sxu32 nTokStart,sxu32 nTokEnd,SyToken **ppEnd)
{
	SyToken *pCur = pIn;
	sxi32 iNest = 1;
	for(;;){
		if( pCur >= pEnd ){
			break;
		}
		if( pCur->nType & nTokStart ){
			/* Increment nesting level */
			iNest++;
		}else if( pCur->nType & nTokEnd ){
			/* Decrement nesting level */
			iNest--;
			if( iNest <= 0 ){
				break;
			}
		}
		/* Advance cursor */
		pCur++;
	}
	/* Point to the end of the chunk */
	*ppEnd = pCur;
}
/*
 * Retrun TRUE if the given ID represent a language construct [i.e: print,echo..]. FALSE otherwise.
 * Note on reserved keywords.
 *  According to the PHP language reference manual:
 *   These words have special meaning in PHP. Some of them represent things which look like 
 *   functions, some look like constants, and so on--but they're not, really: they are language
 *   constructs. You cannot use any of the following words as constants, class names, function
 *   or method names. Using them as variable names is generally OK, but could lead to confusion.
 */
PH7_PRIVATE int PH7_IsLangConstruct(sxu32 nKeyID,sxu8 bCheckFunc)
{
	if( nKeyID == PH7_TKWRD_ECHO || nKeyID == PH7_TKWRD_PRINT || nKeyID == PH7_TKWRD_INCLUDE
		|| nKeyID == PH7_TKWRD_INCONCE || nKeyID == PH7_TKWRD_REQUIRE || nKeyID == PH7_TKWRD_REQONCE
		){
			return TRUE;
	}
	if( bCheckFunc ){
		if(  nKeyID == PH7_TKWRD_ISSET || nKeyID == PH7_TKWRD_UNSET || nKeyID == PH7_TKWRD_EVAL
			|| nKeyID == PH7_TKWRD_EMPTY || nKeyID == PH7_TKWRD_ARRAY || nKeyID == PH7_TKWRD_LIST
			|| /* TICKET 1433-012 */ nKeyID == PH7_TKWRD_NEW || nKeyID == PH7_TKWRD_CLONE  ){
				return TRUE;
		}
	}
	/* Not a language construct */
	return FALSE; 
}
/*
 * Make sure we are dealing with a valid expression tree.
 * This function check for balanced parenthesis,braces,brackets and so on.
 * When errors,PH7 take care of generating the appropriate error message.
 * Return SXRET_OK on success. Any other return value indicates syntax error.
 */
static sxi32 ExprVerifyNodes(ph7_gen_state *pGen,ph7_expr_node **apNode,sxi32 nNode)
{
	sxi32 iParen,iSquare,iQuesty,iBraces;
	sxi32 i,rc;

	if( nNode > 0 && apNode[0]->pOp && (apNode[0]->pOp->iOp == EXPR_OP_ADD || apNode[0]->pOp->iOp == EXPR_OP_SUB) ){
		/* Fix and mark as an unary not binary plus/minus operator */
		apNode[0]->pOp = PH7_ExprExtractOperator(&apNode[0]->pStart->sData,0);
		apNode[0]->pStart->pUserData = (void *)apNode[0]->pOp;
	}
	iParen = iSquare = iQuesty = iBraces = 0;
	for( i = 0 ; i < nNode ; ++i ){
		if( apNode[i]->pStart->nType & PH7_TK_LPAREN /*'('*/){
			if( i > 0 && ( apNode[i-1]->xCode == PH7_CompileVariable || apNode[i-1]->xCode == PH7_CompileLiteral ||
				(apNode[i - 1]->pStart->nType & (PH7_TK_ID|PH7_TK_KEYWORD|PH7_TK_SSTR|PH7_TK_DSTR|PH7_TK_RPAREN/*')'*/|PH7_TK_CSB/*']'*/|PH7_TK_CCB/*'}'*/))) ){
					/* Ticket 1433-033: Take care to ignore alpha-stream [i.e: or,xor] operators followed by an opening parenthesis */
					if( (apNode[i - 1]->pStart->nType & PH7_TK_OP) == 0 ){
						/* We are dealing with a postfix [i.e: function call]  operator
						 * not a simple left parenthesis. Mark the node.
						 */
						apNode[i]->pStart->nType |= PH7_TK_OP;
						apNode[i]->pStart->pUserData = (void *)&sFCallOp; /* Function call operator */
						apNode[i]->pOp = &sFCallOp;
					}
			}
			iParen++;
		}else if( apNode[i]->pStart->nType & PH7_TK_RPAREN/*')*/){
			if( iParen <= 0 ){
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,apNode[i]->pStart->nLine,"Syntax error: Unexpected token ')'");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				return rc;
			}
			iParen--;
		}else if( apNode[i]->pStart->nType & PH7_TK_OSB /*'['*/){
			iSquare++;
		}else if (apNode[i]->pStart->nType & PH7_TK_CSB /*']'*/){
			if( iSquare <= 0 ){
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,apNode[i]->pStart->nLine,"Syntax error: Unexpected token ']'");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				return rc;
			}
			iSquare--;
		}else if( apNode[i]->pStart->nType & PH7_TK_OCB /*'{'*/){
			iBraces++;
			if( i > 0 && ( apNode[i - 1]->xCode == PH7_CompileVariable || (apNode[i - 1]->pStart->nType & PH7_TK_CSB/*]*/)) ){
				const ph7_expr_op *pOp,*pEnd;
				int iNest = 1;
				sxi32 j=i+1;
				/* 
				 * Dirty Hack: $a{'x'} == > $a['x']
				 */
				apNode[i]->pStart->nType &= ~PH7_TK_OCB /*'{'*/;
				apNode[i]->pStart->nType |= PH7_TK_OSB /*'['*/;
				pOp =  aOpTable;
				pEnd = &pOp[sizeof(aOpTable)];
				while( pOp < pEnd ){
					if( pOp->iOp == EXPR_OP_SUBSCRIPT ){
						break;
					}
					pOp++;
				}
				if( pOp >= pEnd ){
					pOp = 0;
				}
				if( pOp ){
					apNode[i]->pOp = pOp;
					apNode[i]->pStart->nType |= PH7_TK_OP;
				}
				iBraces--;
				iSquare++;
				while( j < nNode ){
					if( apNode[j]->pStart->nType & PH7_TK_OCB /*{*/){
						/* Increment nesting level */
						iNest++;
					}else if( apNode[j]->pStart->nType & PH7_TK_CCB/*}*/ ){
						/* Decrement nesting level */
						iNest--;
						if( iNest < 1 ){
							break;
						}
					}
					j++;
				}
				if( j < nNode ){
					apNode[j]->pStart->nType &= ~PH7_TK_CCB /*'}'*/;
					apNode[j]->pStart->nType |= PH7_TK_CSB /*']'*/;
				}

			}
		}else if (apNode[i]->pStart->nType & PH7_TK_CCB /*'}'*/){
			if( iBraces <= 0 ){
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,apNode[i]->pStart->nLine,"Syntax error: Unexpected token '}'");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				return rc;
			}
			iBraces--;
		}else if ( apNode[i]->pStart->nType & PH7_TK_COLON ){
			if( iQuesty <= 0 ){
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,apNode[i]->pStart->nLine,"Syntax error: Unexpected token ':'");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				return rc;
			}
			iQuesty--;
		}else if( apNode[i]->pStart->nType & PH7_TK_OP ){
			const ph7_expr_op *pOp = (const ph7_expr_op *)apNode[i]->pOp;
			if( pOp->iOp == EXPR_OP_QUESTY ){
				iQuesty++;
			}else if( i > 0 && (pOp->iOp == EXPR_OP_UMINUS || pOp->iOp == EXPR_OP_UPLUS)){
				if( apNode[i-1]->xCode == PH7_CompileVariable || apNode[i-1]->xCode == PH7_CompileLiteral ){
					sxi32 iExprOp = EXPR_OP_SUB; /* Binary minus */
					sxu32 n = 0;
					if( pOp->iOp == EXPR_OP_UPLUS ){
						iExprOp = EXPR_OP_ADD; /* Binary plus */
					}
					/*
					 * TICKET 1433-013: This is a fix around an obscure bug when the user uses
					 * a variable name which is an alpha-stream operator [i.e: $and,$xor,$eq..].
					 */
					while( n < SX_ARRAYSIZE(aOpTable) && aOpTable[n].iOp != iExprOp ){
						++n;
					}
					pOp = &aOpTable[n];
					/* Mark as binary '+' or '-',not an unary */
					apNode[i]->pOp = pOp;
					apNode[i]->pStart->pUserData = (void *)pOp;
				}
			}
		}
	}
	if( iParen != 0 || iSquare != 0 || iQuesty != 0 || iBraces != 0){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,apNode[0]->pStart->nLine,"Syntax error,mismatched '(','[','{' or '?'");
		if( rc != SXERR_ABORT ){
			rc = SXERR_SYNTAX;
		}
		return rc;
	}
	return SXRET_OK;
}
/*
 * Collect and assemble tokens holding a namespace path [i.e: namespace\to\const] 
 * or a simple literal [i.e: PHP_EOL].
 */
static void ExprAssembleLiteral(SyToken **ppCur,SyToken *pEnd)
{
	SyToken *pIn = *ppCur;
	/* Jump the first literal seen */
	if( (pIn->nType & PH7_TK_NSSEP) == 0 ){
		pIn++;
	}
	for(;;){
		if(pIn < pEnd && (pIn->nType & PH7_TK_NSSEP) ){
			pIn++;
			if(pIn < pEnd && (pIn->nType & (PH7_TK_ID|PH7_TK_KEYWORD)) ){
				pIn++;
			}
		}else{
			break;
		}
	}
	/* Synchronize pointers */
	*ppCur = pIn;
}
/*
 * Collect and assemble tokens holding annonymous functions/closure body.
 * When errors,PH7 take care of generating the appropriate error message.
 * Note on annonymous functions.
 *  According to the PHP language reference manual:
 *  Anonymous functions, also known as closures, allow the creation of functions
 *  which have no specified name. They are most useful as the value of callback
 *  parameters, but they have many other uses. 
 *  Closures may also inherit variables from the parent scope. Any such variables
 *  must be declared in the function header. Inheriting variables from the parent
 *  scope is not the same as using global variables. Global variables exist in the global scope
 *  which is the same no matter what function is executing. The parent scope of a closure is the 
 *  function in which the closure was declared (not necessarily the function it was called from).
 *
 * Some example:
 *  $greet = function($name)
 * {
 *   printf("Hello %s\r\n", $name);
 * };
 *  $greet('World');
 *  $greet('PHP');
 *
 * $double = function($a) {
 *   return $a * 2;
 * };
 * // This is our range of numbers
 * $numbers = range(1, 5);
 * // Use the Annonymous function as a callback here to 
 * // double the size of each element in our 
 * // range
 * $new_numbers = array_map($double, $numbers);
 * print implode(' ', $new_numbers);
 */
static sxi32 ExprAssembleAnnon(ph7_gen_state *pGen,SyToken **ppCur,SyToken *pEnd)
{
	SyToken *pIn = *ppCur;
	sxu32 nLine;
	sxi32 rc;
	/* Jump the 'function' keyword */
	nLine = pIn->nLine;
	pIn++;
	if( pIn < pEnd && (pIn->nType & (PH7_TK_ID|PH7_TK_KEYWORD)) ){
		pIn++;
	}
	if( pIn >= pEnd || (pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Missing opening parenthesis '(' while declaring annonymous function");
		if( rc != SXERR_ABORT ){
			rc = SXERR_SYNTAX;
		}
		goto Synchronize;
	}
	pIn++; /* Jump the leading parenthesis '(' */
	PH7_DelimitNestedTokens(pIn,pEnd,PH7_TK_LPAREN/*'('*/,PH7_TK_RPAREN/*')'*/,&pIn);
	if( pIn >= pEnd || &pIn[1] >= pEnd ){
		/* Syntax error */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Syntax error while declaring annonymous function");
		if( rc != SXERR_ABORT ){
			rc = SXERR_SYNTAX;
		}
		goto Synchronize;
	}
	pIn++; /* Jump the trailing parenthesis */
	if( pIn->nType & PH7_TK_KEYWORD ){
		sxu32 nKey = SX_PTR_TO_INT(pIn->pUserData);
		/* Check if we are dealing with a closure */
		if( nKey == PH7_TKWRD_USE ){
			pIn++; /* Jump the 'use' keyword */
			if( pIn >= pEnd || (pIn->nType & PH7_TK_LPAREN) == 0 ){
				/* Syntax error */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Syntax error while declaring annonymous function");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				goto Synchronize;
			}
			pIn++; /* Jump the leading parenthesis '(' */
			PH7_DelimitNestedTokens(pIn,pEnd,PH7_TK_LPAREN/*'('*/,PH7_TK_RPAREN/*')'*/,&pIn);
			if( pIn >= pEnd || &pIn[1] >= pEnd ){
				/* Syntax error */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Syntax error while declaring annonymous function");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				goto Synchronize;
			}
			pIn++;
		}else{
			/* Syntax error */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Syntax error while declaring annonymous function");
			if( rc != SXERR_ABORT ){
				rc = SXERR_SYNTAX;
			}
			goto Synchronize;
		}
	}
	if( pIn->nType & PH7_TK_OCB /*'{'*/ ){
		pIn++; /* Jump the leading curly '{' */
		PH7_DelimitNestedTokens(pIn,pEnd,PH7_TK_OCB/*'{'*/,PH7_TK_CCB/*'}'*/,&pIn);
		if( pIn < pEnd ){
			pIn++;
		}
	}else{
		/* Syntax error */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Syntax error while declaring annonymous function,missing '{'");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}			
	}
	rc = SXRET_OK;
Synchronize:
	/* Synchronize pointers */
	*ppCur = pIn;
	return rc;
}
/*
 * Extract a single expression node from the input.
 * On success store the freshly extractd node in ppNode.
 * When errors,PH7 take care of generating the appropriate error message.
 * An expression node can be a variable [i.e: $var],an operator [i.e: ++] 
 * an annonymous function [i.e: function(){ return "Hello"; }, a double/single
 * quoted string, a heredoc/nowdoc,a literal [i.e: PHP_EOL],a namespace path
 * [i.e: namespaces\path\to..],a array/list [i.e: array(4,5,6)] and so on.
 */
static sxi32 ExprExtractNode(ph7_gen_state *pGen,ph7_expr_node **ppNode)
{
	ph7_expr_node *pNode;
	SyToken *pCur;
	sxi32 rc;
	/* Allocate a new node */
	pNode = (ph7_expr_node *)SyMemBackendPoolAlloc(&pGen->pVm->sAllocator,sizeof(ph7_expr_node));
	if( pNode == 0 ){
		/* If the supplied memory subsystem is so sick that we are unable to allocate
		 * a tiny chunk of memory, there is no much we can do here.
		 */
		return SXERR_MEM;
	}
	/* Zero the structure */
	SyZero(pNode,sizeof(ph7_expr_node));
	SySetInit(&pNode->aNodeArgs,&pGen->pVm->sAllocator,sizeof(ph7_expr_node **));
	/* Point to the head of the token stream */
	pCur = pNode->pStart = pGen->pIn;
	/* Start collecting tokens */
	if( pCur->nType & PH7_TK_OP ){
		/* Point to the instance that describe this operator */
		pNode->pOp = (const ph7_expr_op *)pCur->pUserData;
		/* Advance the stream cursor */
		pCur++;
	}else if( pCur->nType & PH7_TK_DOLLAR ){
		/* Isolate variable */
		while( pCur < pGen->pEnd && (pCur->nType & PH7_TK_DOLLAR) ){
			pCur++; /* Variable variable */
		}
		if( pCur < pGen->pEnd ){
			if (pCur->nType & (PH7_TK_ID|PH7_TK_KEYWORD) ){
				/* Variable name */
				pCur++;
			}else if( pCur->nType & PH7_TK_OCB /* '{' */ ){
				pCur++;
				/* Dynamic variable name,Collect until the next non nested '}' */
				PH7_DelimitNestedTokens(pCur,pGen->pEnd,PH7_TK_OCB, PH7_TK_CCB,&pCur);
				if( pCur < pGen->pEnd ){
					pCur++;
				}else{
					rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"Syntax error: Missing closing brace '}'");
					if( rc != SXERR_ABORT ){
						rc = SXERR_SYNTAX;
					}
					SyMemBackendPoolFree(&pGen->pVm->sAllocator,pNode);
					return rc;
				}
			}
		}
		pNode->xCode = PH7_CompileVariable;
	 }else if( pCur->nType & PH7_TK_KEYWORD ){
		 sxu32 nKeyword = (sxu32)SX_PTR_TO_INT(pCur->pUserData);
		 if( nKeyword == PH7_TKWRD_ARRAY ||  nKeyword == PH7_TKWRD_LIST ){
			 /* List/Array node */
			 if( &pCur[1] >= pGen->pEnd || (pCur[1].nType & PH7_TK_LPAREN) == 0 ){
				 /* Assume a literal */
				 ExprAssembleLiteral(&pCur,pGen->pEnd);
				 pNode->xCode = PH7_CompileLiteral;
			 }else{
				 pCur += 2; 
				 /* Collect array/list tokens */
				 PH7_DelimitNestedTokens(pCur,pGen->pEnd,PH7_TK_LPAREN /* '(' */, PH7_TK_RPAREN /* ')' */,&pCur);
				 if( pCur < pGen->pEnd ){
					 pCur++;
				 }else{
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,
						 "%s: Missing closing parenthesis ')'",nKeyword == PH7_TKWRD_LIST ? "list" : "array");
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 SyMemBackendPoolFree(&pGen->pVm->sAllocator,pNode);
					 return rc; 
				 }
				 pNode->xCode = (nKeyword == PH7_TKWRD_LIST) ? PH7_CompileList : PH7_CompileArray;
				 if( pNode->xCode == PH7_CompileList ){
					 ph7_expr_op *pOp = (pCur < pGen->pEnd) ? (ph7_expr_op *)pCur->pUserData : 0;
					 if( pCur >= pGen->pEnd || (pCur->nType & PH7_TK_OP) == 0  || pOp == 0 || pOp->iVmOp != PH7_OP_STORE /*'='*/){
						 /* Syntax error */
						 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"list(): expecting '=' after construct");
						 if( rc != SXERR_ABORT ){
							 rc = SXERR_SYNTAX;
						 }
						 SyMemBackendPoolFree(&pGen->pVm->sAllocator,pNode);
						 return rc; 
					 }
				 }
			 }
		 }else if( nKeyword == PH7_TKWRD_FUNCTION ){
			 /* Annonymous function */
			  if( &pCur[1] >= pGen->pEnd ){
				 /* Assume a literal */
				ExprAssembleLiteral(&pCur,pGen->pEnd);
				pNode->xCode = PH7_CompileLiteral;
			 }else{
				 /* Assemble annonymous functions body */
				 rc = ExprAssembleAnnon(&(*pGen),&pCur,pGen->pEnd);
				 if( rc != SXRET_OK ){
					 SyMemBackendPoolFree(&pGen->pVm->sAllocator,pNode);
					 return rc; 
				 }
				 pNode->xCode = PH7_CompileAnnonFunc;
			  }
		 }else if( PH7_IsLangConstruct(nKeyword,FALSE) == TRUE && &pCur[1] < pGen->pEnd ){
			 /* Language constructs [i.e: print,echo,die...] require special handling */
			 PH7_DelimitNestedTokens(pCur,pGen->pEnd,PH7_TK_LPAREN|PH7_TK_OCB|PH7_TK_OSB, PH7_TK_RPAREN|PH7_TK_CCB|PH7_TK_CSB,&pCur);
			 pNode->xCode = PH7_CompileLangConstruct;
		 }else{
			 /* Assume a literal */
			 ExprAssembleLiteral(&pCur,pGen->pEnd);
			 pNode->xCode = PH7_CompileLiteral;
		 }
	 }else if( pCur->nType & (PH7_TK_NSSEP|PH7_TK_ID) ){
		 /* Constants,function name,namespace path,class name... */
		 ExprAssembleLiteral(&pCur,pGen->pEnd);
		 pNode->xCode = PH7_CompileLiteral;
	 }else{
		 if( (pCur->nType & (PH7_TK_LPAREN|PH7_TK_RPAREN|PH7_TK_COMMA|PH7_TK_COLON|PH7_TK_CSB|PH7_TK_OCB|PH7_TK_CCB)) == 0 ){
			 /* Point to the code generator routine */
			 pNode->xCode = PH7_GetNodeHandler(pCur->nType);
			 if( pNode->xCode == 0 ){
				 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"Syntax error: Unexpected token '%z'",&pNode->pStart->sData);
				 if( rc != SXERR_ABORT ){
					 rc = SXERR_SYNTAX;
				 }
				 SyMemBackendPoolFree(&pGen->pVm->sAllocator,pNode);
				 return rc;
			 }
		 }
		/* Advance the stream cursor */
		pCur++;
	 }
	/* Point to the end of the token stream */
	pNode->pEnd = pCur;
	/* Save the node for later processing */
	*ppNode = pNode;
	/* Synchronize cursors */
	pGen->pIn = pCur;
	return SXRET_OK;
}
/*
 * Point to the next expression that should be evaluated shortly.
 * The cursor stops when it hit a comma ',' or a semi-colon and the nesting
 * level is zero.
 */
PH7_PRIVATE sxi32 PH7_GetNextExpr(SyToken *pStart,SyToken *pEnd,SyToken **ppNext)
{
	SyToken *pCur = pStart;
	sxi32 iNest = 0;
	if( pCur >= pEnd || (pCur->nType & PH7_TK_SEMI/*';'*/) ){
		/* Last expression */
		return SXERR_EOF;
	}
	while( pCur < pEnd ){
		if( (pCur->nType & (PH7_TK_COMMA/*','*/|PH7_TK_SEMI/*';'*/)) && iNest <= 0){
			break;
		}
		if( pCur->nType & (PH7_TK_LPAREN/*'('*/|PH7_TK_OSB/*'['*/|PH7_TK_OCB/*'{'*/) ){
			iNest++;
		}else if( pCur->nType & (PH7_TK_RPAREN/*')'*/|PH7_TK_CSB/*']'*/|PH7_TK_CCB/*'}*/) ){
			iNest--;
		}
		pCur++;
	}
	*ppNext = pCur;
	return SXRET_OK;
}
/*
 * Free an expression tree.
 */
static void ExprFreeTree(ph7_gen_state *pGen,ph7_expr_node *pNode)
{
	if( pNode->pLeft ){
		/* Release the left tree */
		ExprFreeTree(&(*pGen),pNode->pLeft);
	}
	if( pNode->pRight ){
		/* Release the right tree */
		ExprFreeTree(&(*pGen),pNode->pRight);
	}
	if( pNode->pCond ){
		/* Release the conditional tree used by the ternary operator */
		ExprFreeTree(&(*pGen),pNode->pCond);
	}
	if( SySetUsed(&pNode->aNodeArgs) > 0 ){
		ph7_expr_node **apArg;
		sxu32 n;
		/* Release node arguments */
		apArg = (ph7_expr_node **)SySetBasePtr(&pNode->aNodeArgs);
		for( n = 0 ; n < SySetUsed(&pNode->aNodeArgs) ; ++n ){
			ExprFreeTree(&(*pGen),apArg[n]);
		}
		SySetRelease(&pNode->aNodeArgs);
	}
	/* Finally,release this node */
	SyMemBackendPoolFree(&pGen->pVm->sAllocator,pNode);
}
/*
 * Free an expression tree.
 * This function is a wrapper around ExprFreeTree() defined above.
 */
PH7_PRIVATE sxi32 PH7_ExprFreeTree(ph7_gen_state *pGen,SySet *pNodeSet)
{
	ph7_expr_node **apNode;
	sxu32 n;
	apNode = (ph7_expr_node **)SySetBasePtr(pNodeSet);
	for( n = 0  ; n < SySetUsed(pNodeSet) ; ++n ){
		if( apNode[n] ){
			ExprFreeTree(&(*pGen),apNode[n]);
		}
	}
	return SXRET_OK;
}
/*
 * Check if the given node is a modifialbe l/r-value.
 * Return TRUE if modifiable.FALSE otherwise.
 */
static int ExprIsModifiableValue(ph7_expr_node *pNode,sxu8 bFunc)
{
	sxi32 iExprOp;
	if( pNode->pOp == 0 ){
		return pNode->xCode == PH7_CompileVariable ? TRUE : FALSE;
	}
	iExprOp = pNode->pOp->iOp;
	if( iExprOp == EXPR_OP_ARROW /*'->' */ || iExprOp == EXPR_OP_DC /*'::'*/ ){
			return TRUE;
	}
	if( iExprOp == EXPR_OP_SUBSCRIPT/*'[]'*/ ){
		if( pNode->pLeft->pOp ) {
			if( pNode->pLeft->pOp->iOp != EXPR_OP_SUBSCRIPT /*'['*/ && pNode->pLeft->pOp->iOp != EXPR_OP_ARROW /*'->'*/
				&& pNode->pLeft->pOp->iOp != EXPR_OP_DC /*'::'*/){
				return FALSE;
			}
		}else if( pNode->pLeft->xCode != PH7_CompileVariable ){
			return FALSE;
		}
		return TRUE;
	}
	if( bFunc && iExprOp == EXPR_OP_FUNC_CALL ){
		return TRUE;
	}
	/* Not a modifiable l or r-value */
	return FALSE;
}
/* Forward declaration */
static sxi32 ExprMakeTree(ph7_gen_state *pGen,ph7_expr_node **apNode,sxi32 nToken);
/* Macro to check if the given node is a terminal */
#define NODE_ISTERM(NODE) (apNode[NODE] && (!apNode[NODE]->pOp || apNode[NODE]->pLeft ))
/*
 * Buid an expression tree for each given function argument.
 * When errors,PH7 take care of generating the appropriate error message.
 */
static sxi32 ExprProcessFuncArguments(ph7_gen_state *pGen,ph7_expr_node *pOp,ph7_expr_node **apNode,sxi32 nToken)
{
	sxi32 iNest,iCur,iNode;
	sxi32 rc;
	/* Process function arguments from left to right */
	iCur = 0;
	for(;;){
		if( iCur >= nToken ){
			/* No more arguments to process */
			break;
		}
		iNode = iCur;
		iNest = 0;
		while( iCur < nToken ){
			if( apNode[iCur] ){
				if( (apNode[iCur]->pStart->nType & PH7_TK_COMMA) && apNode[iCur]->pLeft == 0 && iNest <= 0 ){
					break;
				}else if( apNode[iCur]->pStart->nType & (PH7_TK_LPAREN|PH7_TK_OSB|PH7_TK_OCB) ){
					iNest++;
				}else if( apNode[iCur]->pStart->nType & (PH7_TK_RPAREN|PH7_TK_CCB|PH7_TK_CSB) ){
					iNest--;
				}
			}
			iCur++;
		}
		if( iCur > iNode ){
			if( apNode[iNode] && (apNode[iNode]->pStart->nType & PH7_TK_AMPER /*'&'*/) && ((iCur - iNode) == 2)
				&& apNode[iNode+1]->xCode == PH7_CompileVariable ){
					PH7_GenCompileError(&(*pGen),E_WARNING,apNode[iNode]->pStart->nLine,
						"call-time pass-by-reference is depreceated");
					ExprFreeTree(&(*pGen),apNode[iNode]);
					apNode[iNode] = 0;
			}
			ExprMakeTree(&(*pGen),&apNode[iNode],iCur-iNode);
			if( apNode[iNode] ){
				/* Put a pointer to the root of the tree in the arguments set */
				SySetPut(&pOp->aNodeArgs,(const void *)&apNode[iNode]);
			}else{
				/* Empty function argument */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pOp->pStart->nLine,"Empty function argument");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				return rc;
			}
		}else{
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pOp->pStart->nLine,"Missing function argument");
			if( rc != SXERR_ABORT ){
				rc = SXERR_SYNTAX;
			}
			return rc;
		}
		/* Jump trailing comma */
		if( iCur < nToken && apNode[iCur] && (apNode[iCur]->pStart->nType & PH7_TK_COMMA) ){
			iCur++;
			if( iCur >= nToken ){
				/* missing function argument */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pOp->pStart->nLine,"Missing function argument");
				if( rc != SXERR_ABORT ){
					rc = SXERR_SYNTAX;
				}
				return rc;
			}
		}
	}
	return SXRET_OK;
}
 /*
  * Create an expression tree from an array of tokens.
  * If successful, the root of the tree is stored in apNode[0].
  * When errors,PH7 take care of generating the appropriate error message.
  */
 static sxi32 ExprMakeTree(ph7_gen_state *pGen,ph7_expr_node **apNode,sxi32 nToken)
 {
	 sxi32 i,iLeft,iRight;
	 ph7_expr_node *pNode;
	 sxi32 iCur;
	 sxi32 rc;
	 if( nToken <= 0 || (nToken == 1 && apNode[0]->xCode) ){
		 /* TICKET 1433-17: self evaluating node */
		 return SXRET_OK;
	 }
	 /* Process expressions enclosed in parenthesis first */
	 for( iCur =  0 ; iCur < nToken ; ++iCur ){
		 sxi32 iNest;
		 /* Note that, we use strict comparison here '!=' instead of the bitwise and '&' operator
		  * since the LPAREN token can also be an operator [i.e: Function call].
		  */
		 if( apNode[iCur] == 0 || apNode[iCur]->pStart->nType != PH7_TK_LPAREN ){
			 continue;
		 }
		 iNest = 1;
		 iLeft = iCur;
		 /* Find the closing parenthesis */
		 iCur++;
		 while( iCur < nToken ){
			 if( apNode[iCur] ){
				 if( apNode[iCur]->pStart->nType & PH7_TK_RPAREN /* ')' */){
					 /* Decrement nesting level */
					 iNest--;
					 if( iNest <= 0 ){
						 break;
					 }
				 }else if( apNode[iCur]->pStart->nType & PH7_TK_LPAREN /* '(' */ ){
					 /* Increment nesting level */
					 iNest++;
				 }
			 }
			 iCur++;
		 }
		 if( iCur - iLeft > 1 ){
			 /* Recurse and process this expression */
			 rc = ExprMakeTree(&(*pGen),&apNode[iLeft + 1],iCur - iLeft - 1);
			 if( rc != SXRET_OK ){
				 return rc;
			 }
		 }
		 /* Free the left and right nodes */
		 ExprFreeTree(&(*pGen),apNode[iLeft]);
		 ExprFreeTree(&(*pGen),apNode[iCur]);
		 apNode[iLeft] = 0;
		 apNode[iCur] = 0;
	 }
	  /* Process expressions enclosed in braces */
	 for( iCur =  0 ; iCur < nToken ; ++iCur ){
		 sxi32 iNest;
		 /* Note that, we use strict comparison here '!=' instead of the bitwise and '&' operator
		  * since the OCB '{' token can also be an operator [i.e: subscripting].
		  */
		 if( apNode[iCur] == 0 || apNode[iCur]->pStart->nType != PH7_TK_OCB ){
			 continue;
		 }
		 iNest = 1;
		 iLeft = iCur;
		 /* Find the closing parenthesis */
		 iCur++;
		 while( iCur < nToken ){
			 if( apNode[iCur] ){
				 if( apNode[iCur]->pStart->nType & PH7_TK_CCB/*'}'*/){
					 /* Decrement nesting level */
					 iNest--;
					 if( iNest <= 0 ){
						 break;
					 }
				 }else if( apNode[iCur]->pStart->nType & PH7_TK_OCB /*'{'*/ ){
					 /* Increment nesting level */
					 iNest++;
				 }
			 }
			 iCur++;
		 }
		 if( iCur - iLeft > 1 ){
			 /* Recurse and process this expression */
			 rc = ExprMakeTree(&(*pGen),&apNode[iLeft + 1],iCur - iLeft - 1);
			 if( rc != SXRET_OK ){
				 return rc;
			 }
		 }
		 /* Free the left and right nodes */
		 ExprFreeTree(&(*pGen),apNode[iLeft]);
		 ExprFreeTree(&(*pGen),apNode[iCur]);
		 apNode[iLeft] = 0;
		 apNode[iCur] = 0;
	 }
	 /* Handle postfix [i.e: function call,subscripting,member access] operators with precedence 2 */
	 iLeft = -1;
	 for( iCur = 0 ; iCur < nToken ; ++iCur ){
		 if( apNode[iCur] == 0 ){
			 continue;
		 }
		 pNode = apNode[iCur];
		 if( pNode->pOp && pNode->pOp->iPrec == 2 && pNode->pLeft == 0  ){
			 if( pNode->pOp->iOp == EXPR_OP_FUNC_CALL ){
				 /* Collect function arguments */
				 sxi32 iPtr = 0;
				 sxi32 nFuncTok = 0;
				 while( nFuncTok + iCur < nToken ){
					 if( apNode[nFuncTok+iCur] ){
						 if( apNode[nFuncTok+iCur]->pStart->nType & PH7_TK_LPAREN /*'('*/ ){
							 iPtr++;
						 }else if ( apNode[nFuncTok+iCur]->pStart->nType & PH7_TK_RPAREN /*')'*/){
							 iPtr--;
							 if( iPtr <= 0 ){
								 break;
							 }
						 }
					 }
					 nFuncTok++;
				 }
				 if( nFuncTok + iCur >= nToken ){
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"Missing right parenthesis ')'");
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc; 
				 }
				 if(  iLeft < 0 || !NODE_ISTERM(iLeft) /*|| ( apNode[iLeft]->pOp && apNode[iLeft]->pOp->iPrec != 2)*/ ){
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"Invalid function name");
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc;
				 }
				 if( nFuncTok > 1 ){
					 /* Process function arguments */
					 rc = ExprProcessFuncArguments(&(*pGen),pNode,&apNode[iCur+1],nFuncTok-1);
					 if( rc != SXRET_OK ){
						 return rc;
					 }
				 }
				 /* Link the node to the tree */
				 pNode->pLeft = apNode[iLeft];
				 apNode[iLeft] = 0;
				 for( iPtr = 1; iPtr <= nFuncTok ; iPtr++ ){
					 apNode[iCur+iPtr] = 0;
				 }
			 }else if (pNode->pOp->iOp == EXPR_OP_SUBSCRIPT ){
				 /* Subscripting */
				 sxi32 iArrTok = iCur + 1;
				 sxi32 iNest = 1;
				 if(  iLeft < 0 || apNode[iLeft] == 0 || (apNode[iLeft]->pOp == 0 && (apNode[iLeft]->xCode != PH7_CompileVariable &&
					 apNode[iLeft]->xCode != PH7_CompileSimpleString && apNode[iLeft]->xCode != PH7_CompileString ) ) ||
					 ( apNode[iLeft]->pOp && apNode[iLeft]->pOp->iPrec != 2 /* postfix */) ){
						 /* Syntax error */
						 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"Invalid array name");
						 if( rc != SXERR_ABORT ){
							 rc = SXERR_SYNTAX;
						 }
						 return rc;
				 }
				 /* Collect index tokens */
				 while( iArrTok < nToken ){
					 if( apNode[iArrTok] ){
						 if( apNode[iArrTok]->pOp && apNode[iArrTok]->pOp->iOp == EXPR_OP_SUBSCRIPT &&  apNode[iArrTok]->pLeft == 0){
							 /* Increment nesting level */
							 iNest++;
						 }else if( apNode[iArrTok]->pStart->nType & PH7_TK_CSB /*']'*/){
							 /* Decrement nesting level */
							 iNest--;
							 if( iNest <= 0 ){
								 break;
							 }
						 }
					 }
					 ++iArrTok;
				 }
				 if( iArrTok > iCur + 1 ){
					 /* Recurse and process this expression */
					 rc = ExprMakeTree(&(*pGen),&apNode[iCur+1],iArrTok - iCur - 1);
					 if( rc != SXRET_OK ){
						 return rc;
					 }
					 /* Link the node to it's index */
					 SySetPut(&pNode->aNodeArgs,(const void *)&apNode[iCur+1]);
				 }
				 /* Link the node to the tree */
				 pNode->pLeft = apNode[iLeft];
				 pNode->pRight = 0;
				 apNode[iLeft] = 0;
				 for( iNest = iCur + 1 ; iNest <= iArrTok ; ++iNest ){
					 apNode[iNest] = 0;
				 }
			 }else{
				 /* Member access operators [i.e: '->','::'] */
				  iRight = iCur + 1;
				 while( iRight < nToken && apNode[iRight] == 0 ){
					 iRight++;
				 }
				 if( iRight >= nToken || iLeft < 0 || !NODE_ISTERM(iRight) || !NODE_ISTERM(iLeft) ){
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing/Invalid member name",&pNode->pOp->sOp);
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc;
				 }
				 /* Link the node to the tree */
				 pNode->pLeft = apNode[iLeft];
				 if( pNode->pOp->iOp == EXPR_OP_ARROW /*'->'*/ && pNode->pLeft->pOp == 0 &&
					 pNode->pLeft->xCode != PH7_CompileVariable ){
						 /* Syntax error */
						 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,
							 "'%z': Expecting a variable as left operand",&pNode->pOp->sOp);
						 if( rc != SXERR_ABORT ){
							 rc = SXERR_SYNTAX;
						 }
						 return rc;
				 }
				 pNode->pRight = apNode[iRight];
				 apNode[iLeft] = apNode[iRight] = 0;
			 }
		 }
		 iLeft = iCur;
	 }
	 /* Handle left associative (new, clone) operators */
	 for( iCur = 0 ; iCur < nToken ; ++iCur ){
		 if( apNode[iCur] == 0 ){
			 continue;
		 }
		 pNode = apNode[iCur];
		 if( pNode->pOp && pNode->pOp->iPrec == 1 && pNode->pLeft == 0 ){
			 SyToken *pToken;
			 /* Get the left node */
			 iLeft = iCur + 1;
			 while( iLeft < nToken && apNode[iLeft] == 0 ){
				 iLeft++;
			 }
			 if( iLeft >= nToken || !NODE_ISTERM(iLeft) ){
				  /* Syntax error */
				 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Expecting class constructor call",
					 &pNode->pOp->sOp);
				 if( rc != SXERR_ABORT ){
					 rc = SXERR_SYNTAX;
				 }
				 return rc;
			 }
			 /* Make sure the operand are of a valid type */
			 if( pNode->pOp->iOp == EXPR_OP_CLONE ){
				 /* Clone:
				  * Symisc eXtension: 'clone' accepts now as it's left operand:
				  *  ++ function call (including annonymous)
				  *  ++ array member
				  *  ++ 'new' operator
				  * Example:
				  *   clone $pObj;
				  *   clone obj(); // function obj(){ return new Class(); }
				  *   clone $a['object']; // $a = array('object' => new Class());   
				  */
				 if( apNode[iLeft]->pOp == 0 ){
					 if( apNode[iLeft]->xCode != PH7_CompileVariable  ){
						 pToken = apNode[iLeft]->pStart;
						 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Unexpected token '%z'",
							 &pNode->pOp->sOp,&pToken->sData);
						 if( rc != SXERR_ABORT ){
							 rc = SXERR_SYNTAX;
						 }
						 return rc; 
					 }
				 }
			 }else{
				 /* New */
				 if( apNode[iLeft]->pOp == 0 ){
					 ProcNodeConstruct xCons = apNode[iLeft]->xCode;
					 if( xCons != PH7_CompileVariable && xCons != PH7_CompileLiteral && xCons != PH7_CompileSimpleString){
						 pToken = apNode[iLeft]->pStart;
						 /* Syntax error */
						 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,
							 "'%z': Unexpected token '%z', expecting literal, variable or constructor call",
							 &pNode->pOp->sOp,&pToken->sData);
						 if( rc != SXERR_ABORT ){
							 rc = SXERR_SYNTAX;
						 }
						 return rc; 
					 }
				 }
			 }
			  /* Link the node to the tree */
			 pNode->pLeft = apNode[iLeft];
			 apNode[iLeft] = 0;
			 pNode->pRight = 0; /* Paranoid */
		 }
	 }
	  /* Handle post/pre icrement/decrement [i.e: ++/--] operators with precedence 3 */
	 iLeft = -1;
	 for( iCur = 0 ; iCur < nToken ; ++iCur ){
		 if( apNode[iCur] == 0 ){
			 continue;
		 }
		 pNode = apNode[iCur];
		 if( pNode->pOp && pNode->pOp->iPrec == 3 && pNode->pLeft == 0){
			 if( iLeft >= 0 && ((apNode[iLeft]->pOp && apNode[iLeft]->pOp->iPrec == 2 /* Postfix */)
				 || apNode[iLeft]->xCode == PH7_CompileVariable) ){
					 /* Link the node to the tree */
					 pNode->pLeft = apNode[iLeft];
					 apNode[iLeft] = 0; 
			 }
		  }
		 iLeft = iCur;
	  }
	 iLeft = -1;
	 for( iCur = nToken -  1 ; iCur >= 0 ; iCur-- ){
		 if( apNode[iCur] == 0 ){
			 continue;
		 }
		 pNode = apNode[iCur];
		 if( pNode->pOp && pNode->pOp->iPrec == 3 && pNode->pLeft == 0){
			 if( iLeft < 0 || (apNode[iLeft]->pOp == 0 && apNode[iLeft]->xCode != PH7_CompileVariable)
				 || ( apNode[iLeft]->pOp && apNode[iLeft]->pOp->iPrec != 2 /* Postfix */) ){
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z' operator needs l-value",&pNode->pOp->sOp);
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc;
			 }
			 /* Link the node to the tree */
			 pNode->pLeft = apNode[iLeft];
			 apNode[iLeft] = 0;
			 /* Mark as pre-increment/decrement node */
			 pNode->iFlags |= EXPR_NODE_PRE_INCR;
		  }
		 iLeft = iCur;
	 }
	 /* Handle right associative unary and cast operators [i.e: !,(string),~...]  with precedence 4*/
	  iLeft = 0;
	  for( iCur = nToken -  1 ; iCur >= 0 ; iCur-- ){
		  if( apNode[iCur] ){
			  pNode = apNode[iCur];
			  if( pNode->pOp && pNode->pOp->iPrec == 4 && pNode->pLeft == 0){
				  if( iLeft > 0 ){
					  /* Link the node to the tree */
					  pNode->pLeft = apNode[iLeft];
					  apNode[iLeft] = 0;
					  if( pNode->pLeft && pNode->pLeft->pOp && pNode->pLeft->pOp->iPrec > 4 ){
						  if( pNode->pLeft->pLeft == 0 || pNode->pLeft->pRight == 0 ){
							   /* Syntax error */
							  rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pLeft->pStart->nLine,"'%z': Missing operand",&pNode->pLeft->pOp->sOp);
							  if( rc != SXERR_ABORT ){
								  rc = SXERR_SYNTAX;
							  }
							  return rc;
						  }
					  }
				  }else{
					  /* Syntax error */
					  rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing operand",&pNode->pOp->sOp);
					  if( rc != SXERR_ABORT ){
						  rc = SXERR_SYNTAX;
					  }
					  return rc;
				  }
			  }
			  /* Save terminal position */
			  iLeft = iCur;
		  }
	  }	 
	 /* Process left and non-associative binary operators [i.e: *,/,&&,||...]*/
	 for( i = 7 ; i < 17 ; i++ ){
		 iLeft = -1;
		 for( iCur = 0 ; iCur < nToken ; ++iCur ){
			 if( apNode[iCur] == 0 ){
				 continue;
			 }
			 pNode = apNode[iCur];
			 if( pNode->pOp && pNode->pOp->iPrec == i && pNode->pLeft == 0 ){
				 /* Get the right node */
				 iRight = iCur + 1;
				 while( iRight < nToken && apNode[iRight] == 0 ){
					 iRight++;
				 }
				 if( iRight >= nToken || iLeft < 0 || !NODE_ISTERM(iRight) || !NODE_ISTERM(iLeft) ){
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing/Invalid operand",&pNode->pOp->sOp);
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc; 
				 }
				 if( pNode->pOp->iOp == EXPR_OP_REF ){
					 sxi32  iTmp;
					 /* Reference operator [i.e: '&=' ]*/
					 if( ExprIsModifiableValue(apNode[iLeft],FALSE) == FALSE || (apNode[iLeft]->pOp && apNode[iLeft]->pOp->iVmOp == PH7_OP_MEMBER /*->,::*/) ){
						 /* Left operand must be a modifiable l-value */
						 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'&': Left operand must be a modifiable l-value");
						 if( rc != SXERR_ABORT ){
							 rc = SXERR_SYNTAX;
						 }
						 return rc; 
					 }
					 if( apNode[iLeft]->pOp == 0 || apNode[iLeft]->pOp->iOp != EXPR_OP_SUBSCRIPT /*$a[] =& 14*/) {
						 if(  ExprIsModifiableValue(apNode[iRight],TRUE) == FALSE ){
							 if( apNode[iRight]->pOp == 0 ||  (apNode[iRight]->pOp->iOp != EXPR_OP_NEW /* new */ 
								 && apNode[iRight]->pOp->iOp != EXPR_OP_CLONE /* clone */) ){
									 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,
										 "Reference operator '&' require a variable not a constant expression as it's right operand");
									 if( rc != SXERR_ABORT ){
										 rc = SXERR_SYNTAX;
									 }
									 return rc; 
							 }
						 }
					 }
					 /* Swap operands */
					 iTmp = iRight;
					 iRight = iLeft;
					 iLeft = iTmp;
				 }
				 /* Link the node to the tree */
				 pNode->pLeft = apNode[iLeft];
				 pNode->pRight = apNode[iRight];
				 apNode[iLeft] = apNode[iRight] = 0;
			 }
			 iLeft = iCur;
		 }
	 }
	 /* Handle the ternary operator. (expr1) ? (expr2) : (expr3) 
	  * Note that we do not need a precedence loop here since
	  * we are dealing with a single operator.
	  */
	  iLeft = -1;
	  for( iCur = 0 ; iCur < nToken ; ++iCur ){
		  if( apNode[iCur] == 0 ){
			  continue;
		  }
		  pNode = apNode[iCur];
		  if( pNode->pOp && pNode->pOp->iOp == EXPR_OP_QUESTY && pNode->pLeft == 0 ){
			  sxi32 iNest = 1;
			  if( iLeft < 0 || !NODE_ISTERM(iLeft) ){
				  /* Missing condition */
				  rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Syntax error",&pNode->pOp->sOp);
				  if( rc != SXERR_ABORT ){
					  rc = SXERR_SYNTAX;
				  }
				  return rc;
			  }
			  /* Get the right node */
			  iRight = iCur + 1;
			  while( iRight < nToken  ){
				  if( apNode[iRight] ){
					  if( apNode[iRight]->pOp && apNode[iRight]->pOp->iOp == EXPR_OP_QUESTY && apNode[iRight]->pCond == 0){
						  /* Increment nesting level */
						  ++iNest;
					  }else if( apNode[iRight]->pStart->nType & PH7_TK_COLON /*:*/ ){
						  /* Decrement nesting level */
						  --iNest;
						  if( iNest <= 0 ){
							  break;
						  }
					  }
				  }
				  iRight++;
			  }
			  if( iRight > iCur + 1 ){
				  /* Recurse and process the then expression */
				  rc = ExprMakeTree(&(*pGen),&apNode[iCur + 1],iRight - iCur - 1);
				  if( rc != SXRET_OK ){
					  return rc;
				  }
				  /* Link the node to the tree */
				  pNode->pLeft = apNode[iCur + 1];
			  }else{
				  rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing 'then' expression",&pNode->pOp->sOp);
				  if( rc != SXERR_ABORT ){
					 rc = SXERR_SYNTAX;
				 }
				 return rc;
			  }
			  apNode[iCur + 1] = 0;
			  if( iRight + 1 < nToken ){
				  /* Recurse and process the else expression */
				  rc = ExprMakeTree(&(*pGen),&apNode[iRight + 1],nToken - iRight - 1);
				  if( rc != SXRET_OK ){
					  return rc;
				  }
				  /* Link the node to the tree */
				  pNode->pRight = apNode[iRight + 1];
				  apNode[iRight + 1] =  apNode[iRight] = 0;
			  }else{
				  rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing 'else' expression",&pNode->pOp->sOp);
				  if( rc != SXERR_ABORT ){
					 rc = SXERR_SYNTAX;
				 }
				 return rc;
			  }
			  /* Point to the condition */
			  pNode->pCond  = apNode[iLeft];
			  apNode[iLeft] = 0;
			  break;
		  }
		  iLeft = iCur;
	  }
	 /* Process right associative binary operators [i.e: '=','+=','/='] 
	  * Note: All right associative binary operators have precedence 18
	  * so there is no need for a precedence loop here.
	  */
	 iRight = -1;
	 for( iCur = nToken -  1 ; iCur >= 0 ; iCur--){
		 if( apNode[iCur] == 0 ){
			 continue;
		 }
		 pNode = apNode[iCur];
		 if( pNode->pOp && pNode->pOp->iPrec == 18 && pNode->pLeft == 0 ){
			 /* Get the left node */
			 iLeft = iCur - 1;
			 while( iLeft >= 0 && apNode[iLeft] == 0 ){
				 iLeft--;
			 }
			 if( iLeft < 0 || iRight < 0 || !NODE_ISTERM(iRight) || !NODE_ISTERM(iLeft) ){
				 /* Syntax error */
				 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing/Invalid operand",&pNode->pOp->sOp);
				 if( rc != SXERR_ABORT ){
					 rc = SXERR_SYNTAX;
				 }
				 return rc;
			 }
			 if( ExprIsModifiableValue(apNode[iLeft],FALSE) == FALSE ){
				 if( pNode->pOp->iVmOp != PH7_OP_STORE || apNode[iLeft]->xCode != PH7_CompileList ){
					 /* Left operand must be a modifiable l-value */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,
						 "'%z': Left operand must be a modifiable l-value",&pNode->pOp->sOp);
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc; 
				 }
			 }
			 /* Link the node to the tree (Reverse) */
			 pNode->pLeft = apNode[iRight];
			 pNode->pRight = apNode[iLeft];
			 apNode[iLeft] = apNode[iRight] = 0;
		 }
		 iRight = iCur;
	 }
	 /* Process left associative binary operators that have the lowest precedence [i.e: and,or,xor] */
	 for( i = 19 ; i < 23 ; i++ ){
		 iLeft = -1;
		 for( iCur = 0 ; iCur < nToken ; ++iCur ){
			 if( apNode[iCur] == 0 ){
				 continue;
			 }
			 pNode = apNode[iCur];
			 if( pNode->pOp && pNode->pOp->iPrec == i && pNode->pLeft == 0 ){
				 /* Get the right node */
				 iRight = iCur + 1;
				 while( iRight < nToken && apNode[iRight] == 0 ){
					 iRight++;
				 }
				 if( iRight >= nToken || iLeft < 0 || !NODE_ISTERM(iRight) || !NODE_ISTERM(iLeft) ){
					 /* Syntax error */
					 rc = PH7_GenCompileError(pGen,E_ERROR,pNode->pStart->nLine,"'%z': Missing/Invalid operand",&pNode->pOp->sOp);
					 if( rc != SXERR_ABORT ){
						 rc = SXERR_SYNTAX;
					 }
					 return rc;  
				 }
				 /* Link the node to the tree */
				 pNode->pLeft = apNode[iLeft];
				 pNode->pRight = apNode[iRight];
				 apNode[iLeft] = apNode[iRight] = 0;
			 }
			 iLeft = iCur;
		 }
	 }
	 /* Point to the root of the expression tree */
	 for( iCur = 1 ; iCur < nToken ; ++iCur ){
		 if( apNode[iCur] ){
			 if( (apNode[iCur]->pOp || apNode[iCur]->xCode ) && apNode[0] != 0){
				 rc = PH7_GenCompileError(pGen,E_ERROR,apNode[iCur]->pStart->nLine,"Unexpected token '%z'",&apNode[iCur]->pStart->sData);
				  if( rc != SXERR_ABORT ){
					  rc = SXERR_SYNTAX;
				  }
				  return rc;  
			 }
			 apNode[0] = apNode[iCur];
			 apNode[iCur] = 0;
		 }
	 }
	 return SXRET_OK;
 }
 /*
  * Build an expression tree from the freshly extracted raw tokens.
  * If successful, the root of the tree is stored in ppRoot.
  * When errors,PH7 take care of generating the appropriate error message.
  * This is the public interface used by the most code generator routines.
  */
PH7_PRIVATE sxi32 PH7_ExprMakeTree(ph7_gen_state *pGen,SySet *pExprNode,ph7_expr_node **ppRoot)
{
	ph7_expr_node **apNode;
	ph7_expr_node *pNode;
	sxi32 rc;
	/* Reset node container */
	SySetReset(pExprNode);
	pNode = 0; /* Prevent compiler warning */
	/* Extract nodes one after one until we hit the end of the input */
	while( pGen->pIn < pGen->pEnd ){
		rc = ExprExtractNode(&(*pGen),&pNode);
		if( rc != SXRET_OK ){
			return rc;
		}
		/* Save the extracted node */
		SySetPut(pExprNode,(const void *)&pNode);
	}
	if( SySetUsed(pExprNode) < 1 ){
		/* Empty expression [i.e: A semi-colon;] */
		*ppRoot = 0;
		return SXRET_OK;
	}
	apNode = (ph7_expr_node **)SySetBasePtr(pExprNode);
	/* Make sure we are dealing with valid nodes */
	rc = ExprVerifyNodes(&(*pGen),apNode,(sxi32)SySetUsed(pExprNode));
	if( rc != SXRET_OK ){
		/* Don't worry about freeing memory,upper layer will
		 * cleanup the mess left behind.
		 */
		*ppRoot = 0;
		return rc;
	}
	/* Build the tree */
	rc = ExprMakeTree(&(*pGen),apNode,(sxi32)SySetUsed(pExprNode));
	if( rc != SXRET_OK ){
		/* Something goes wrong [i.e: Syntax error] */
		*ppRoot = 0;
		return rc;
	}
	/* Point to the root of the tree */
	*ppRoot = apNode[0];
	return SXRET_OK;
}
/*
 * ----------------------------------------------------------
 * File: oo.c
 * MD5: 4b7cc68a49eca23fc71ff7f103f5dfc7
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: oo.c v1.9 FeeBSD 2012-07-17 03:44 devel <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/*
 * This file implement an Object Oriented (OO) subsystem for the PH7 engine.
 */
/*
 * Create an empty class.
 * Return a pointer to a raw class (ph7_class instance) on success. NULL otherwise.
 */
PH7_PRIVATE ph7_class * PH7_NewRawClass(ph7_vm *pVm,const SyString *pName,sxu32 nLine)
{
	ph7_class *pClass;
	char *zName;
	/* Allocate a new instance */
	pClass = (ph7_class *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_class));
	if( pClass == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pClass,sizeof(ph7_class));
	/* Duplicate class name */
	zName = SyMemBackendStrDup(&pVm->sAllocator,pName->zString,pName->nByte);
	if( zName == 0 ){
		SyMemBackendPoolFree(&pVm->sAllocator,pClass);
		return 0;
	}
	/* Initialize fields */
	SyStringInitFromBuf(&pClass->sName,zName,pName->nByte);
	SyHashInit(&pClass->hMethod,&pVm->sAllocator,0,0);
	SyHashInit(&pClass->hAttr,&pVm->sAllocator,0,0);
	SyHashInit(&pClass->hDerived,&pVm->sAllocator,0,0);
	SySetInit(&pClass->aInterface,&pVm->sAllocator,sizeof(ph7_class *));
	pClass->nLine = nLine;
	/* All done */
	return pClass;
}
/*
 * Allocate and initialize a new class attribute.
 * Return a pointer to the class attribute on success. NULL otherwise.
 */
PH7_PRIVATE ph7_class_attr * PH7_NewClassAttr(ph7_vm *pVm,const SyString *pName,sxu32 nLine,sxi32 iProtection,sxi32 iFlags)
{
	ph7_class_attr *pAttr;
	char *zName;
	pAttr = (ph7_class_attr *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_class_attr));
	if( pAttr == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pAttr,sizeof(ph7_class_attr));
	/* Duplicate attribute name */
	zName = SyMemBackendStrDup(&pVm->sAllocator,pName->zString,pName->nByte);
	if( zName == 0 ){
		SyMemBackendPoolFree(&pVm->sAllocator,pAttr);
		return 0;
	}
	/* Initialize fields */
	SySetInit(&pAttr->aByteCode,&pVm->sAllocator,sizeof(VmInstr));
	SyStringInitFromBuf(&pAttr->sName,zName,pName->nByte);
	pAttr->iProtection = iProtection;
	pAttr->nIdx = SXU32_HIGH;
	pAttr->iFlags = iFlags;
	pAttr->nLine = nLine;
	return pAttr;
}
/*
 * Allocate and initialize a new class method.
 * Return a pointer to the class method on success. NULL otherwise
 * This function associate with the newly created method an automatically generated
 * random unique name.
 */
PH7_PRIVATE ph7_class_method * PH7_NewClassMethod(ph7_vm *pVm,ph7_class *pClass,const SyString *pName,sxu32 nLine,
	sxi32 iProtection,sxi32 iFlags,sxi32 iFuncFlags)
{
	ph7_class_method *pMeth;
	SyHashEntry *pEntry;
	SyString *pNamePtr;
	char zSalt[10];
	char *zName;
	sxu32 nByte;
	/* Allocate a new class method instance */
	pMeth = (ph7_class_method *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_class_method));
	if( pMeth == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pMeth,sizeof(ph7_class_method));
	/* Check for an already installed method with the same name */
	pEntry = SyHashGet(&pClass->hMethod,(const void *)pName->zString,pName->nByte);
	if( pEntry == 0 ){
		/* Associate an unique VM name to this method */
		nByte = sizeof(zSalt) + pName->nByte + SyStringLength(&pClass->sName)+sizeof(char)*7/*[[__'\0'*/;
		zName = (char *)SyMemBackendAlloc(&pVm->sAllocator,nByte);
		if( zName == 0 ){
			SyMemBackendPoolFree(&pVm->sAllocator,pMeth);
			return 0;
		}
		pNamePtr = &pMeth->sVmName;
		/* Generate a random string */
		PH7_VmRandomString(&(*pVm),zSalt,sizeof(zSalt));
		pNamePtr->nByte = SyBufferFormat(zName,nByte,"[__%z@%z_%.*s]",&pClass->sName,pName,sizeof(zSalt),zSalt);
		pNamePtr->zString = zName;
	}else{
		/* Method is condidate for 'overloading' */
		ph7_class_method *pCurrent = (ph7_class_method *)pEntry->pUserData;
		pNamePtr = &pMeth->sVmName;
		/* Use the same VM name */
		SyStringDupPtr(pNamePtr,&pCurrent->sVmName);
		zName = (char *)pNamePtr->zString;
	}
	if( iProtection != PH7_CLASS_PROT_PUBLIC ){
		if( (pName->nByte == sizeof("__construct") - 1 && SyMemcmp(pName->zString,"__construct",sizeof("__construct") - 1 ) == 0)
			|| (pName->nByte == sizeof("__destruct") - 1 && SyMemcmp(pName->zString,"__destruct",sizeof("__destruct") - 1 ) == 0)
			|| SyStringCmp(pName,&pClass->sName,SyMemcmp) == 0 ){
				/* Switch to public visibility when dealing with constructor/destructor */
				iProtection = PH7_CLASS_PROT_PUBLIC;
		}
	}
	/* Initialize method fields */
	pMeth->iProtection = iProtection;
	pMeth->iFlags = iFlags;
	pMeth->nLine = nLine;
	PH7_VmInitFuncState(&(*pVm),&pMeth->sFunc,&zName[sizeof(char)*4/*[__@*/+SyStringLength(&pClass->sName)],
		pName->nByte,iFuncFlags|VM_FUNC_CLASS_METHOD,pClass);
	return pMeth;
}
/*
 * Check if the given name have a class method associated with it.
 * Return the desired method [i.e: ph7_class_method instance] on success. NULL otherwise.
 */
PH7_PRIVATE ph7_class_method * PH7_ClassExtractMethod(ph7_class *pClass,const char *zName,sxu32 nByte)
{
	SyHashEntry *pEntry;
	/* Perform a hash lookup */
	pEntry = SyHashGet(&pClass->hMethod,(const void *)zName,nByte);
	if( pEntry == 0 ){
		/* No such entry */
		return 0;
	}
	/* Point to the desired method */
	return (ph7_class_method *)pEntry->pUserData;
}
/*
 * Check if the given name is a class attribute.
 * Return the desired attribute [i.e: ph7_class_attr instance] on success.NULL otherwise.
 */
PH7_PRIVATE ph7_class_attr * PH7_ClassExtractAttribute(ph7_class *pClass,const char *zName,sxu32 nByte)
{
	SyHashEntry *pEntry;
	/* Perform a hash lookup */
	pEntry = SyHashGet(&pClass->hAttr,(const void *)zName,nByte);
	if( pEntry == 0 ){
		/* No such entry */
		return 0;
	}
	/* Point to the desierd method */
	return (ph7_class_attr *)pEntry->pUserData;
}
/*
 * Install a class attribute in the corresponding container.
 * Return SXRET_OK on success. Any other return value indicates failure.
 */
PH7_PRIVATE sxi32 PH7_ClassInstallAttr(ph7_class *pClass,ph7_class_attr *pAttr)
{
	SyString *pName = &pAttr->sName;
	sxi32 rc;
	rc = SyHashInsert(&pClass->hAttr,(const void *)pName->zString,pName->nByte,pAttr);
	return rc;
}
/*
 * Install a class method in the corresponding container.
 * Return SXRET_OK on success. Any other return value indicates failure.
 */
PH7_PRIVATE sxi32 PH7_ClassInstallMethod(ph7_class *pClass,ph7_class_method *pMeth)
{
	SyString *pName = &pMeth->sFunc.sName;
	sxi32 rc;
	rc = SyHashInsert(&pClass->hMethod,(const void *)pName->zString,pName->nByte,pMeth);
	return rc;
}
/*
 * Perform an inheritance operation.
 * According to the PHP language reference manual
 *  When you extend a class, the subclass inherits all of the public and protected methods
 *  from the parent class. Unless a class Overwrites those methods, they will retain their original
 *  functionality.
 *  This is useful for defining and abstracting functionality, and permits the implementation
 *  of additional functionality in similar objects without the need to reimplement all of the shared
 *  functionality.
 *  Example #1 Inheritance Example
 * <?php
 * class foo
 * {
 *   public function printItem($string)
 *   {
 *       echo 'Foo: ' . $string . PHP_EOL;
 *   }
 *   
 *   public function printPHP()
 *   {
 *       echo 'PHP is great.' . PHP_EOL;
 *   }
 * }
 * class bar extends foo
 * {
 *   public function printItem($string)
 *   {
 *       echo 'Bar: ' . $string . PHP_EOL;
 *   }
 * }
 * $foo = new foo();
 * $bar = new bar();
 * $foo->printItem('baz'); // Output: 'Foo: baz'
 * $foo->printPHP();       // Output: 'PHP is great' 
 * $bar->printItem('baz'); // Output: 'Bar: baz'
 * $bar->printPHP();       // Output: 'PHP is great'
 *
 * This function return SXRET_OK if the inheritance operation was successfully performed.
 * Any other return value indicates failure and the upper layer must generate an appropriate
 * error message.
 */
PH7_PRIVATE sxi32 PH7_ClassInherit(ph7_gen_state *pGen,ph7_class *pSub,ph7_class *pBase)
{
	ph7_class_method *pMeth;
	ph7_class_attr *pAttr;
	SyHashEntry *pEntry;
	SyString *pName;
	sxi32 rc;
	/* Install in the derived hashtable */
	rc = SyHashInsert(&pBase->hDerived,(const void *)SyStringData(&pSub->sName),SyStringLength(&pSub->sName),pSub);
	if( rc != SXRET_OK ){
		return rc;
	}
	/* Copy public/protected attributes from the base class */
	SyHashResetLoopCursor(&pBase->hAttr);
	while((pEntry = SyHashGetNextEntry(&pBase->hAttr)) != 0 ){
		/* Make sure the private attributes are not redeclared in the subclass */
		pAttr = (ph7_class_attr *)pEntry->pUserData;
		pName = &pAttr->sName;
		if( (pEntry = SyHashGet(&pSub->hAttr,(const void *)pName->zString,pName->nByte)) != 0 ){
			if( pAttr->iProtection == PH7_CLASS_PROT_PRIVATE && 
				((ph7_class_attr *)pEntry->pUserData)->iProtection != PH7_CLASS_PROT_PUBLIC ){
					/* Cannot redeclare private attribute */
					PH7_GenCompileError(&(*pGen),E_WARNING,((ph7_class_attr *)pEntry->pUserData)->nLine,
						"Private attribute '%z::%z' redeclared inside child class '%z'",
						&pBase->sName,pName,&pSub->sName);
					
			}
			continue;
		}
		/* Install the attribute */
		if( pAttr->iProtection != PH7_CLASS_PROT_PRIVATE ){
			rc = SyHashInsert(&pSub->hAttr,(const void *)pName->zString,pName->nByte,pAttr);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
	}
	SyHashResetLoopCursor(&pBase->hMethod);
	while((pEntry = SyHashGetNextEntry(&pBase->hMethod)) != 0 ){
		/* Make sure the private/final methods are not redeclared in the subclass */
		pMeth = (ph7_class_method *)pEntry->pUserData;
		pName = &pMeth->sFunc.sName;
		if( (pEntry = SyHashGet(&pSub->hMethod,(const void *)pName->zString,pName->nByte)) != 0 ){
			 if( pMeth->iFlags & PH7_CLASS_ATTR_FINAL ){
				/* Cannot Overwrite final method */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,((ph7_class_method *)pEntry->pUserData)->nLine,
					"Cannot Overwrite final method '%z:%z' inside child class '%z'",
					&pBase->sName,pName,&pSub->sName);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			continue;
		}else{
			if( pMeth->iFlags & PH7_CLASS_ATTR_ABSTRACT ){
				/* Abstract method must be defined in the child class */
				PH7_GenCompileError(&(*pGen),E_WARNING,pMeth->nLine,
					"Abstract method '%z:%z' must be defined inside child class '%z'",
					&pBase->sName,pName,&pSub->sName);
				continue;
			}
		}
		/* Install the method */
		if( pMeth->iProtection != PH7_CLASS_PROT_PRIVATE ){
			rc = SyHashInsert(&pSub->hMethod,(const void *)pName->zString,pName->nByte,pMeth);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
	}
	/* Mark as subclass */
	pSub->pBase = pBase;
	/* All done */
	return SXRET_OK;
}
/*
 * Inherit an object interface from another object interface.
 * According to the PHP language reference manual.
 *  Object interfaces allow you to create code which specifies which methods a class
 *  must implement, without having to define how these methods are handled.
 *  Interfaces are defined using the interface keyword, in the same way as a standard
 *  class, but without any of the methods having their contents defined.
 *  All methods declared in an interface must be public, this is the nature of an interface.
 *
 * This function return SXRET_OK if the interface inheritance operation was successfully performed.
 * Any other return value indicates failure and the upper layer must generate an appropriate
 * error message.
 */
PH7_PRIVATE sxi32 PH7_ClassInterfaceInherit(ph7_class *pSub,ph7_class *pBase)
{
	ph7_class_method *pMeth;
	ph7_class_attr *pAttr;
	SyHashEntry *pEntry;
	SyString *pName;
	sxi32 rc;
	/* Install in the derived hashtable */
	SyHashInsert(&pBase->hDerived,(const void *)SyStringData(&pSub->sName),SyStringLength(&pSub->sName),pSub);
	SyHashResetLoopCursor(&pBase->hAttr);
	/* Copy constants */
	while((pEntry = SyHashGetNextEntry(&pBase->hAttr)) != 0 ){
		/* Make sure the constants are not redeclared in the subclass */
		pAttr = (ph7_class_attr *)pEntry->pUserData;
		pName = &pAttr->sName;
		if( SyHashGet(&pSub->hAttr,(const void *)pName->zString,pName->nByte) == 0 ){
			/* Install the constant in the subclass */
			rc = SyHashInsert(&pSub->hAttr,(const void *)pName->zString,pName->nByte,pAttr);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
	}
	SyHashResetLoopCursor(&pBase->hMethod);
	/* Copy methods signature */
	while((pEntry = SyHashGetNextEntry(&pBase->hMethod)) != 0 ){
		/* Make sure the method are not redeclared in the subclass */
		pMeth = (ph7_class_method *)pEntry->pUserData;
		pName = &pMeth->sFunc.sName;
		if( SyHashGet(&pSub->hMethod,(const void *)pName->zString,pName->nByte) == 0 ){
			/* Install the method */
			rc = SyHashInsert(&pSub->hMethod,(const void *)pName->zString,pName->nByte,pMeth);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
	}
	/* Mark as subclass */
	pSub->pBase = pBase;
	/* All done */
	return SXRET_OK;
}
/*
 * Implements an object interface in the given main class.
 * According to the PHP language reference manual.
 *  Object interfaces allow you to create code which specifies which methods a class
 *  must implement, without having to define how these methods are handled.
 *  Interfaces are defined using the interface keyword, in the same way as a standard
 *  class, but without any of the methods having their contents defined.
 *  All methods declared in an interface must be public, this is the nature of an interface.
 *
 * This function return SXRET_OK if the interface was successfully implemented.
 * Any other return value indicates failure and the upper layer must generate an appropriate
 * error message.
 */
PH7_PRIVATE sxi32 PH7_ClassImplement(ph7_class *pMain,ph7_class *pInterface)
{
	ph7_class_attr *pAttr;
	SyHashEntry *pEntry;
	SyString *pName;
	sxi32 rc;
	/* First off,copy all constants declared inside the interface */
	SyHashResetLoopCursor(&pInterface->hAttr);
	while((pEntry = SyHashGetNextEntry(&pInterface->hAttr)) != 0 ){
		/* Point to the constant declaration */
		pAttr = (ph7_class_attr *)pEntry->pUserData;
		pName = &pAttr->sName;
		/* Make sure the attribute is not redeclared in the main class */
		if( SyHashGet(&pMain->hAttr,pName->zString,pName->nByte) == 0 ){
			/* Install the attribute */
			rc = SyHashInsert(&pMain->hAttr,pName->zString,pName->nByte,pAttr);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
	}
	/* Install in the interface container */
	SySetPut(&pMain->aInterface,(const void *)&pInterface);
	/* TICKET 1433-49/1: Symisc eXtension 
	 *  A class may not implemnt all declared interface methods,so there
	 *  is no need for a method installer loop here.
	 */
	return SXRET_OK;
}
/*
 * Create a class instance [i.e: Object in the PHP jargon] at run-time.
 * The following function is called when an object is created at run-time
 * typically when the PH7_OP_NEW/PH7_OP_CLONE instructions are executed.
 * Notes on object creation.
 *
 * According to PHP language reference manual.
 * To create an instance of a class, the new keyword must be used. An object will always
 * be created unless the object has a constructor defined that throws an exception on error.
 * Classes should be defined before instantiation (and in some cases this is a requirement).
 * If a string containing the name of a class is used with new, a new instance of that class
 * will be created. If the class is in a namespace, its fully qualified name must be used when
 * doing this.
 * Example #3 Creating an instance
 * <?php
 *  $instance = new SimpleClass();
 *   // This can also be done with a variable:
 * $className = 'Foo';
 * $instance = new $className(); // Foo()
 * ?>
 * In the class context, it is possible to create a new object by new self and new parent.
 * When assigning an already created instance of a class to a new variable, the new variable
 * will access the same instance as the object that was assigned. This behaviour is the same
 * when passing instances to a function. A copy of an already created object can be made by 
 * cloning it.
 * Example #4 Object Assignment
 * <?php
 *  class SimpleClass(){
 *    public $var;
 *  };
 *  $instance = new SimpleClass();
 *  $assigned   =  $instance;
 *  $reference  =& $instance;
 *  $instance->var = '$assigned will have this value';
 *  $instance = null; // $instance and $reference become null
 *  var_dump($instance);
 *  var_dump($reference);
 *  var_dump($assigned);
 * ?>
 * The above example will output:
 * NULL
 * NULL
 * object(SimpleClass)#1 (1) {
 *  ["var"]=>
 *    string(30) "$assigned will have this value"
 * }
 * Example #5 Creating new objects
 * <?php
 * class Test 
 * {
 *   static public function getNew()
 *   {
 *       return new static;
 *   }
 * }
 * class Child extends Test
 * {}
 * $obj1 = new Test();
 * $obj2 = new $obj1;
 * var_dump($obj1 !== $obj2);
 * $obj3 = Test::getNew();
 * var_dump($obj3 instanceof Test);
 * $obj4 = Child::getNew();
 * var_dump($obj4 instanceof Child);
 * ?>
 * The above example will output:
 * bool(true)
 * bool(true)
 * bool(true)
 * Note that Symisc Systems have introduced powerfull extension to
 * OO subsystem. For example a class attribute may have any complex
 * expression associated with it when declaring the attribute unlike
 * the standard PHP engine which would allow a single value.
 * Example:
 *  class myClass{
 *    public $var = 25<<1+foo()/bar();
 *  };
 * Refer to the official documentation for more information.
 */
static ph7_class_instance * NewClassInstance(ph7_vm *pVm,ph7_class *pClass)
{
	ph7_class_instance *pThis;
	/* Allocate a new instance */
	pThis = (ph7_class_instance *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_class_instance));
	if( pThis == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pThis,sizeof(ph7_class_instance));
	/* Initialize fields */
	pThis->iRef = 1;
	pThis->pVm = pVm;
	pThis->pClass = pClass;
	SyHashInit(&pThis->hAttr,&pVm->sAllocator,0,0);
	return pThis;
}
/*
 * Wrapper around the NewClassInstance() function defined above.
 * See the block comment above for more information.
 */
PH7_PRIVATE ph7_class_instance * PH7_NewClassInstance(ph7_vm *pVm,ph7_class *pClass)
{
	ph7_class_instance *pNew;
	sxi32 rc;
	pNew = NewClassInstance(&(*pVm),&(*pClass));
	if( pNew == 0 ){
		return 0;
	}
	/* Associate a private VM frame with this class instance */
	rc = PH7_VmCreateClassInstanceFrame(&(*pVm),pNew);
	if( rc != SXRET_OK ){
		SyMemBackendPoolFree(&pVm->sAllocator,pNew);
		return 0;
	}
	return pNew;
}
/*
 * Extract the value of a class instance [i.e: Object in the PHP jargon] attribute.
 * This function never fail.
 */
static ph7_value * ExtractClassAttrValue(ph7_vm *pVm,VmClassAttr *pAttr)
{
	/* Extract the value */
	ph7_value *pValue;
	pValue = (ph7_value *)SySetAt(&pVm->aMemObj,pAttr->nIdx);
	return pValue;
}
/*
 * Perform a clone operation on a class instance [i.e: Object in the PHP jargon].
 * The following function is called when an object is cloned at run-time
 * typically when the PH7_OP_CLONE instruction is executed.
 * Notes on object cloning.
 *
 * According to PHP language reference manual.
 * Creating a copy of an object with fully replicated properties is not always the wanted behavior.
 * A good example of the need for copy constructors. Another example is if your object holds a reference
 * to another object which it uses and when you replicate the parent object you want to create 
 * a new instance of this other object so that the replica has its own separate copy.
 * An object copy is created by using the clone keyword (which calls the object's __clone() method if possible).
 * An object's __clone() method cannot be called directly.
 * $copy_of_object = clone $object;
 * When an object is cloned, PHP 5 will perform a shallow copy of all of the object's properties.
 * Any properties that are references to other variables, will remain references.
 * Once the cloning is complete, if a __clone() method is defined, then the newly created object's __clone() method 
 * will be called, to allow any necessary properties that need to be changed.
 * Example #1 Cloning an object
 * <?php
 * class SubObject
 * {
 *   static $instances = 0;
 *   public $instance;
 *
 *   public function __construct() {
 *       $this->instance = ++self::$instances;
 *   }
 *
 *   public function __clone() {
 *       $this->instance = ++self::$instances;
 *   }
 * }
 * 
 * class MyCloneable
 * {
 *   public $object1;
 *   public $object2;
 *
 *   function __clone()
 *   {
 *       // Force a copy of this->object, otherwise
 *       // it will point to same object.
 *       $this->object1 = clone $this->object1;
 *   }
 * }
 * $obj = new MyCloneable();
 * $obj->object1 = new SubObject();
 * $obj->object2 = new SubObject();
 * $obj2 = clone $obj;
 * print("Original Object:\n");
 * print_r($obj);
 * print("Cloned Object:\n");
 * print_r($obj2);
 * ?>
 * The above example will output:
 * Original Object:
 * MyCloneable Object
 * (
 *   [object1] => SubObject Object
 *       (
 *           [instance] => 1
 *       )
 *
 *   [object2] => SubObject Object
 *       (
 *           [instance] => 2
 *       )
 *
 * )
 * Cloned Object:
 * MyCloneable Object
 * (
 *   [object1] => SubObject Object
 *       (
 *           [instance] => 3
 *       )
 *
 *   [object2] => SubObject Object
 *       (
 *           [instance] => 2
 *       )
 * )
 */
PH7_PRIVATE ph7_class_instance * PH7_CloneClassInstance(ph7_class_instance *pSrc)
{
	ph7_class_instance *pClone;
	ph7_class_method *pMethod;
	SyHashEntry *pEntry2;
	SyHashEntry *pEntry;
	ph7_vm *pVm;
	sxi32 rc;
	/* Allocate a new instance */
	pVm = pSrc->pVm;
	pClone = NewClassInstance(pVm,pSrc->pClass);
	if( pClone == 0 ){
		return 0;
	}
	/* Associate a private VM frame with this class instance */
	rc = PH7_VmCreateClassInstanceFrame(pVm,pClone);
	if( rc != SXRET_OK ){
		SyMemBackendPoolFree(&pVm->sAllocator,pClone);
		return 0;
	}
	/* Duplicate object values */
	SyHashResetLoopCursor(&pSrc->hAttr);
	SyHashResetLoopCursor(&pClone->hAttr);
	while((pEntry = SyHashGetNextEntry(&pSrc->hAttr)) != 0 && (pEntry2 = SyHashGetNextEntry(&pClone->hAttr)) != 0 ){
		VmClassAttr *pSrcAttr = (VmClassAttr *)pEntry->pUserData;
		VmClassAttr *pDestAttr = (VmClassAttr *)pEntry2->pUserData;
		/* Duplicate non-static attribute */
		if( (pSrcAttr->pAttr->iFlags & (PH7_CLASS_ATTR_STATIC|PH7_CLASS_ATTR_CONSTANT)) == 0 ){
			ph7_value *pvSrc,*pvDest;
			pvSrc = ExtractClassAttrValue(pVm,pSrcAttr);
			pvDest = ExtractClassAttrValue(pVm,pDestAttr);
			if( pvSrc && pvDest ){
				PH7_MemObjStore(pvSrc,pvDest);
			}
		}
	}
	/* call the __clone method on the cloned object if available */
	pMethod = PH7_ClassExtractMethod(pClone->pClass,"__clone",sizeof("__clone")-1);
	if( pMethod ){
		if( pMethod->iCloneDepth < 16 ){
			pMethod->iCloneDepth++;
			PH7_VmCallClassMethod(pVm,pClone,pMethod,0,0,0);
		}else{
			/* Nesting limit reached */
			PH7_VmThrowError(pVm,0,PH7_CTX_ERR,"Object clone limit reached,no more call to __clone()");
		}
		/* Reset the cursor */
		pMethod->iCloneDepth = 0;
	}
	/* Return the cloned object */
	return pClone;
}
#define CLASS_INSTANCE_DESTROYED 0x001 /* Instance is released */
/*
 * Release a class instance [i.e: Object in the PHP jargon] and invoke any defined destructor.
 * This routine is invoked as soon as there are no other references to a particular
 * class instance.
 */
static void PH7_ClassInstanceRelease(ph7_class_instance *pThis)
{
	ph7_class_method *pDestr;
	SyHashEntry *pEntry;
	ph7_class *pClass;
	ph7_vm *pVm;
	if( pThis->iFlags & CLASS_INSTANCE_DESTROYED ){
		/*
		 * Already destroyed,return immediately.
		 * This could happend if someone perform unset($this) in the destructor body.
		 */
		return;
	}
	/* Mark as destroyed */
	pThis->iFlags |= CLASS_INSTANCE_DESTROYED;
	/* Invoke any defined destructor if available */
	pVm = pThis->pVm;
	pClass = pThis->pClass;
	pDestr = PH7_ClassExtractMethod(pClass,"__destruct",sizeof("__destruct")-1);
	if( pDestr ){
		/* Invoke the destructor */
		pThis->iRef = 2; /* Prevent garbage collection */
		PH7_VmCallClassMethod(pVm,pThis,pDestr,0,0,0);
	}
	/* Release non-static attributes */
	SyHashResetLoopCursor(&pThis->hAttr);
	while((pEntry = SyHashGetNextEntry(&pThis->hAttr)) != 0 ){
		VmClassAttr *pVmAttr = (VmClassAttr *)pEntry->pUserData;
		if( (pVmAttr->pAttr->iFlags & (PH7_CLASS_ATTR_STATIC|PH7_CLASS_ATTR_CONSTANT)) == 0 ){
			PH7_VmUnsetMemObj(pVm,pVmAttr->nIdx,TRUE);
		}
		SyMemBackendPoolFree(&pVm->sAllocator,pVmAttr);
	}
	/* Release the whole structure */
	SyHashRelease(&pThis->hAttr);
	SyMemBackendPoolFree(&pVm->sAllocator,pThis);
}
/*
 * Decrement the reference count of a class instance [i.e Object in the PHP jargon].
 * If the reference count reaches zero,release the whole instance.
 */
PH7_PRIVATE void PH7_ClassInstanceUnref(ph7_class_instance *pThis)
{
	pThis->iRef--;
	if( pThis->iRef < 1 ){
		/* No more reference to this instance */
		PH7_ClassInstanceRelease(&(*pThis));
	}
}
/*
 * Compare two class instances [i.e: Objects in the PHP jargon]
 * Note on objects comparison:
 *  According to the PHP langauge reference manual
 *  When using the comparison operator (==), object variables are compared in a simple manner
 *  namely: Two object instances are equal if they have the same attributes and values, and are
 *  instances of the same class.
 *  On the other hand, when using the identity operator (===), object variables are identical
 *  if and only if they refer to the same instance of the same class.
 *  An example will clarify these rules.
 *  Example #1 Example of object comparison
 *  <?php
 *    function bool2str($bool)
 * {
 *   if ($bool === false) {
 *       return 'FALSE';
 *   } else {
 *       return 'TRUE';
 *   }
 * }
 * function compareObjects(&$o1, &$o2)
 * {
 *   echo 'o1 == o2 : ' . bool2str($o1 == $o2) . "\n";
 *   echo 'o1 != o2 : ' . bool2str($o1 != $o2) . "\n";
 *   echo 'o1 === o2 : ' . bool2str($o1 === $o2) . "\n";
 *   echo 'o1 !== o2 : ' . bool2str($o1 !== $o2) . "\n";
 * }
 * class Flag
 * {
 *   public $flag;
 *
 *   function Flag($flag = true) {
 *       $this->flag = $flag;
 *   }
 * }
 *
 * class OtherFlag
 * {
 *   public $flag;
 *
 *   function OtherFlag($flag = true) {
 *       $this->flag = $flag;
 *   }
 * }
 * 
 * $o = new Flag();
 * $p = new Flag();
 * $q = $o;
 * $r = new OtherFlag();
 *
 * echo "Two instances of the same class\n";
 * compareObjects($o, $p);
 * echo "\nTwo references to the same instance\n";
 * compareObjects($o, $q);
 * echo "\nInstances of two different classes\n";
 * compareObjects($o, $r);
 * ?>
 * The above example will output:
 * Two instances of the same class
 * o1 == o2 : TRUE
 * o1 != o2 : FALSE
 * o1 === o2 : FALSE
 * o1 !== o2 : TRUE
 * Two references to the same instance
 * o1 == o2 : TRUE
 * o1 != o2 : FALSE
 * o1 === o2 : TRUE
 * o1 !== o2 : FALSE
 * Instances of two different classes
 * o1 == o2 : FALSE
 * o1 != o2 : TRUE
 * o1 === o2 : FALSE
 * o1 !== o2 : TRUE
 *
 * This function return 0 if the objects are equals according to the comprison rules defined above.
 * Any other return values indicates difference.
 */
PH7_PRIVATE sxi32 PH7_ClassInstanceCmp(ph7_class_instance *pLeft,ph7_class_instance *pRight,int bStrict,int iNest)
{
	SyHashEntry *pEntry,*pEntry2;
	ph7_value sV1,sV2;
	sxi32 rc;
	if( iNest > 31 ){
		/* Nesting limit reached */
		PH7_VmThrowError(pLeft->pVm,0,PH7_CTX_ERR,"Nesting limit reached: Infinite recursion?");
		return 1;
	}
	/* Comparison is performed only if the objects are instance of the same class */
	if( pLeft->pClass != pRight->pClass ){
		return 1;
	}
	if( bStrict ){
		/*
		 * According to the PHP language reference manual:
		 *  when using the identity operator (===), object variables
		 *  are identical if and only if they refer to the same instance
		 *  of the same class.
		 */
		return !(pLeft == pRight);
	}
	/*
	 * Attribute comparison.
	 * According to the PHP reference manual:
	 *  When using the comparison operator (==), object variables are compared 
	 *  in a simple manner, namely: Two object instances are equal if they have
	 *  the same attributes and values, and are instances of the same class. 
	 */
	if( pLeft == pRight ){
		/* Same instance,don't bother processing,object are equals */
		return 0;
	}
	SyHashResetLoopCursor(&pLeft->hAttr);
	SyHashResetLoopCursor(&pRight->hAttr);
	PH7_MemObjInit(pLeft->pVm,&sV1);
	PH7_MemObjInit(pLeft->pVm,&sV2);
	sV1.nIdx = sV2.nIdx = SXU32_HIGH;
	while((pEntry = SyHashGetNextEntry(&pLeft->hAttr)) != 0 && (pEntry2 = SyHashGetNextEntry(&pRight->hAttr)) != 0 ){
		VmClassAttr *p1 = (VmClassAttr *)pEntry->pUserData;
		VmClassAttr *p2 = (VmClassAttr *)pEntry2->pUserData;
		/* Compare only non-static attribute */
		if( (p1->pAttr->iFlags & (PH7_CLASS_ATTR_CONSTANT|PH7_CLASS_ATTR_STATIC)) == 0 ){
			ph7_value *pL,*pR;
			pL = ExtractClassAttrValue(pLeft->pVm,p1);
			pR = ExtractClassAttrValue(pRight->pVm,p2);
			if( pL && pR ){
				PH7_MemObjLoad(pL,&sV1);
				PH7_MemObjLoad(pR,&sV2);
				/* Compare the two values now */
				rc = PH7_MemObjCmp(&sV1,&sV2,bStrict,iNest+1);
				PH7_MemObjRelease(&sV1);
				PH7_MemObjRelease(&sV2);
				if( rc != 0 ){
					/* Not equals */
					return rc;
				}
			}
		}
	}
	/* Object are equals */
	return 0;
}
/*
 * Dump a class instance and the store the dump in the BLOB given
 * as the first argument.
 * Note that only non-static/non-constants attribute are dumped.
 * This function is typically invoked when the user issue a call
 * to [var_dump(),var_export(),print_r(),...].
 * This function SXRET_OK on success. Any other return value including
 * SXERR_LIMIT(infinite recursion) indicates failure.
 */
PH7_PRIVATE sxi32 PH7_ClassInstanceDump(SyBlob *pOut,ph7_class_instance *pThis,int ShowType,int nTab,int nDepth)
{
	SyHashEntry *pEntry;
	ph7_value *pValue;
	sxi32 rc;
	int i;
	if( nDepth > 31 ){
		static const char zInfinite[] = "Nesting limit reached: Infinite recursion?";
		/* Nesting limit reached..halt immediately*/
		SyBlobAppend(&(*pOut),zInfinite,sizeof(zInfinite)-1);
		if( ShowType ){
			SyBlobAppend(&(*pOut),")",sizeof(char));
		}
		return SXERR_LIMIT;
	}
	rc = SXRET_OK;
	if( !ShowType ){
		SyBlobAppend(&(*pOut),"Object(",sizeof("Object(")-1);
	}
	/* Append class name */
	SyBlobFormat(&(*pOut),"%z) {",&pThis->pClass->sName);
#ifdef __WINNT__
	SyBlobAppend(&(*pOut),"\r\n",sizeof("\r\n")-1);
#else
	SyBlobAppend(&(*pOut),"\n",sizeof(char));
#endif
	/* Dump object attributes */
	SyHashResetLoopCursor(&pThis->hAttr);
	while((pEntry = SyHashGetNextEntry(&pThis->hAttr)) != 0){
		VmClassAttr *pVmAttr = (VmClassAttr *)pEntry->pUserData;
		if((pVmAttr->pAttr->iFlags & (PH7_CLASS_ATTR_CONSTANT|PH7_CLASS_ATTR_STATIC)) == 0 ){
			/* Dump non-static/constant attribute only */
			for( i = 0 ; i < nTab ; i++ ){
				SyBlobAppend(&(*pOut)," ",sizeof(char));
			}
			pValue = ExtractClassAttrValue(pThis->pVm,pVmAttr);
			if( pValue ){
				SyBlobFormat(&(*pOut),"['%z'] =>",&pVmAttr->pAttr->sName);
#ifdef __WINNT__
				SyBlobAppend(&(*pOut),"\r\n",sizeof("\r\n")-1);
#else
				SyBlobAppend(&(*pOut),"\n",sizeof(char));
#endif
				rc = PH7_MemObjDump(&(*pOut),pValue,ShowType,nTab+1,nDepth,0);
				if( rc == SXERR_LIMIT ){
					break;
				}
			}
		}
	}
	for( i = 0 ; i < nTab ; i++ ){
		SyBlobAppend(&(*pOut)," ",sizeof(char));
	}
	SyBlobAppend(&(*pOut),"}",sizeof(char));
	return rc;
}
/*
 * Call a magic method [i.e: __toString(),__toBool(),__Invoke()...]
 * Return SXRET_OK on successfull call. Any other return value indicates failure.
 * Notes on magic methods.
 * According to the PHP language reference manual.
 *  The function names __construct(), __destruct(), __call(), __callStatic()
 *  __get(),  __toString(), __invoke(), __clone() are magical in PHP classes.
 * You cannot have functions with these names in any of your classes unless
 * you want the magic functionality associated with them.
 * Example of magical methods:
 * __toString()
 *  The __toString() method allows a class to decide how it will react when it is treated like
 *  a string. For example, what echo $obj; will print. This method must return a string.
 *  Example #2 Simple example
 * <?php
 * // Declare a simple class
 * class TestClass
 * {
 *   public $foo;
 *
 *   public function __construct($foo)
 *   {
 *       $this->foo = $foo;
 *   }
 *
 *   public function __toString()
 *   {
 *       return $this->foo;
 *   }
 * }
 * $class = new TestClass('Hello');
 * echo $class;
 * ?>
 * The above example will output:
 *  Hello
 *
 * Note that PH7 does not support all the magical method and introudces __toFloat(),__toInt()
 * which have the same behaviour as __toString() but for float and integer types
 * respectively.
 * Refer to the official documentation for more information.
 */
PH7_PRIVATE sxi32 PH7_ClassInstanceCallMagicMethod(
	ph7_vm *pVm,               /* VM that own all this stuff */
	ph7_class *pClass,         /* Target class */
	ph7_class_instance *pThis, /* Target object */
	const char *zMethod,       /* Magic method name [i.e: __toString()]*/
	sxu32 nByte,               /* zMethod length*/
	const SyString *pAttrName  /* Attribute name */
	)
{
	ph7_value *apArg[2] = { 0 , 0 };
	ph7_class_method *pMeth;
	ph7_value sAttr; /* cc warning */
	sxi32 rc;
	int nArg;
	/* Make sure the magic method is available */
	pMeth = PH7_ClassExtractMethod(&(*pClass),zMethod,nByte);
	if( pMeth == 0 ){
		/* No such method,return immediately */
		return SXERR_NOTFOUND;
	}
	nArg = 0;
	/* Copy arguments */
	if( pAttrName ){
		PH7_MemObjInitFromString(pVm,&sAttr,pAttrName);
		sAttr.nIdx = SXU32_HIGH; /* Mark as constant */
		apArg[0] = &sAttr;
		nArg = 1;
	}
	/* Call the magic method now */
	rc = PH7_VmCallClassMethod(pVm,&(*pThis),pMeth,0,nArg,apArg);
	/* Clean up */
	if( pAttrName ){
		PH7_MemObjRelease(&sAttr);
	}
	return rc;
}
/*
 * Extract the value of a class instance [i.e: Object in the PHP jargon].
 * This function is simply a wrapper on ExtractClassAttrValue().
 */
PH7_PRIVATE ph7_value * PH7_ClassInstanceExtractAttrValue(ph7_class_instance *pThis,VmClassAttr *pAttr)
{
   /* Extract the attribute value */
	ph7_value *pValue;	
	pValue = ExtractClassAttrValue(pThis->pVm,pAttr);
	return pValue;
}
/*
 * Convert a class instance [i.e: Object in the PHP jargon] into a hashmap [i.e: array in the PHP jargon].
 * Return SXRET_OK on success. Any other value indicates failure.
 * Note on object conversion to array:
 *  Acccording to the PHP language reference manual
 *  If an object is converted to an array, the result is an array whose elements are the object's properties.
 *  The keys are the member variable names.
 *
 *  The following example:
 *  class Test {
 *   public $A = 25<<1;  // 50 
 *	 public $c = rand_str(3);   // Random string of length 3
 *	 public $d = rand() & 1023; // Random number between 0..1023
 *  }
 *  var_dump((array) new Test());
 *	Will output:
 *  array(3) {
 *   [A] =>
 *      int(50)
 *   [c] =>
 *     string(3 'aps')
 *   [d] =>
 *     int(991)
 *  }
 * You have noticed that PH7 allow class attributes [i.e: $a,$c,$d in the example above]
 * have any complex expression (even function calls/Annonymous functions) as their default
 * value unlike the standard PHP engine.
 * This is a very powerful feature that you have to look at. 
 */
PH7_PRIVATE sxi32 PH7_ClassInstanceToHashmap(ph7_class_instance *pThis,ph7_hashmap *pMap)
{
	SyHashEntry *pEntry;
	SyString *pAttrName;
	VmClassAttr *pAttr;
	ph7_value *pValue;
	ph7_value sName;
	/* Reset the loop cursor */
	SyHashResetLoopCursor(&pThis->hAttr);
	PH7_MemObjInitFromString(pThis->pVm,&sName,0);
	while((pEntry = SyHashGetNextEntry(&pThis->hAttr)) != 0 ){
		/* Point to the current attribute */
		pAttr = (VmClassAttr *)pEntry->pUserData;
		/* Extract attribute value */
		pValue = ExtractClassAttrValue(pThis->pVm,pAttr);
		if( pValue ){
			/* Build attribute name */
			pAttrName = &pAttr->pAttr->sName;
			PH7_MemObjStringAppend(&sName,pAttrName->zString,pAttrName->nByte);
			/* Perform the insertion */
			PH7_HashmapInsert(pMap,&sName,pValue);
			/* Reset the string cursor */
			SyBlobReset(&sName.sBlob);
		}
	}
	PH7_MemObjRelease(&sName);
	return SXRET_OK;
}
/*
 * Iterate throw class attributes and invoke the given callback [i.e: xWalk()] for each 
 * retrieved attribute.
 * Note that argument are passed to the callback by copy. That is,any modification to 
 * the attribute value in the callback body will not alter the real attribute value.
 * If the callback wishes to abort processing [i.e: it's invocation] it must return
 * a value different from PH7_OK.
 * Refer to [ph7_object_walk()] for more information.
 */
PH7_PRIVATE sxi32 PH7_ClassInstanceWalk(
	ph7_class_instance *pThis, /* Target object */
	int (*xWalk)(const char *,ph7_value *,void *), /* Walker callback */
	void *pUserData /* Last argument to xWalk() */
	)
{
	SyHashEntry *pEntry; /* Hash entry */
	VmClassAttr *pAttr;  /* Pointer to the attribute */
	ph7_value *pValue;   /* Attribute value */
	ph7_value sValue;    /* Copy of the attribute value */
	int rc;
	/* Reset the loop cursor */
	SyHashResetLoopCursor(&pThis->hAttr);
	PH7_MemObjInit(pThis->pVm,&sValue);
	/* Start the walk process */
	while((pEntry = SyHashGetNextEntry(&pThis->hAttr)) != 0 ){
		/* Point to the current attribute */
		pAttr = (VmClassAttr *)pEntry->pUserData;
		/* Extract attribute value */
		pValue = ExtractClassAttrValue(pThis->pVm,pAttr);
		if( pValue ){
			PH7_MemObjLoad(pValue,&sValue);
			/* Invoke the supplied callback */
			rc =  xWalk(SyStringData(&pAttr->pAttr->sName),&sValue,pUserData);
			PH7_MemObjRelease(&sValue);
			if( rc != PH7_OK){
				/* User callback request an operation abort */
				return SXERR_ABORT;
			}
		}
	}
	/* All done */
	return SXRET_OK;
}
/*
 * Extract a class atrribute value.
 * Return a pointer to the attribute value on success. Otherwise NULL.
 * Note:
 *  Access to static and constant attribute is not allowed. That is,the function
 *  will return NULL in case someone (host-application code) try to extract
 *  a static/constant attribute.
 */
PH7_PRIVATE ph7_value * PH7_ClassInstanceFetchAttr(ph7_class_instance *pThis,const SyString *pName)
{
	SyHashEntry *pEntry;
	VmClassAttr *pAttr;
	/* Query the attribute hashtable */
	pEntry = SyHashGet(&pThis->hAttr,(const void *)pName->zString,pName->nByte);
	if( pEntry == 0 ){
		/* No such attribute */
		return 0;
	}
	/* Point to the class atrribute */
	pAttr = (VmClassAttr *)pEntry->pUserData;
	/* Check if we are dealing with a static/constant attribute */
	if( pAttr->pAttr->iFlags & (PH7_CLASS_ATTR_CONSTANT|PH7_CLASS_ATTR_STATIC) ){
		/* Access is forbidden */
		return 0;
	}
	/* Return the attribute value */
	return ExtractClassAttrValue(pThis->pVm,pAttr);
}
/*
 * ----------------------------------------------------------
 * File: memobj.c
 * MD5: 02f3ad7da7ab382b1d5bf779013b4d7b
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: memobj.c v2.7 FreeBSD 2012-08-09 03:40 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/* This file handle low-level stuff related to indexed memory objects [i.e: ph7_value] */
/*
 * Notes on memory objects [i.e: ph7_value].
 * Internally, the PH7 virtual machine manipulates nearly all PHP values
 * [i.e: string,int,float,resource,object,bool,null..] as ph7_values structures.
 * Each ph7_values struct may cache multiple representations (string,
 * integer etc.) of the same value.
 */
/*
 * Convert a 64-bit IEEE double into a 64-bit signed integer.
 * If the double is too large, return 0x8000000000000000.
 *
 * Most systems appear to do this simply by assigning ariables and without
 * the extra range tests.
 * But there are reports that windows throws an expection if the floating 
 * point value is out of range.
 */
static sxi64 MemObjRealToInt(ph7_value *pObj)
{
#ifdef PH7_OMIT_FLOATING_POINT
	/* Real and 64bit integer are the same when floating point arithmetic
	 * is omitted from the build.
	 */
	return pObj->rVal;
#else
 /*
  ** Many compilers we encounter do not define constants for the
  ** minimum and maximum 64-bit integers, or they define them
  ** inconsistently.  And many do not understand the "LL" notation.
  ** So we define our own static constants here using nothing
  ** larger than a 32-bit integer constant.
  */
  static const sxi64 maxInt = LARGEST_INT64;
  static const sxi64 minInt = SMALLEST_INT64;
  ph7_real r = pObj->rVal;
  if( r<(ph7_real)minInt ){
    return minInt;
  }else if( r>(ph7_real)maxInt ){
    /* minInt is correct here - not maxInt.  It turns out that assigning
    ** a very large positive number to an integer results in a very large
    ** negative integer.  This makes no sense, but it is what x86 hardware
    ** does so for compatibility we will do the same in software. */
    return minInt;
  }else{
    return (sxi64)r;
  }
#endif
}
/*
 * Convert a raw token value typically a stream of digit [i.e: hex,octal,binary or decimal] 
 * to a 64-bit integer.
 */
PH7_PRIVATE sxi64 PH7_TokenValueToInt64(SyString *pVal)
{
	sxi64 iVal = 0;
	if( pVal->nByte <= 0 ){
		return 0;
	}
	if( pVal->zString[0] == '0' ){
		sxi32 c;
		if( pVal->nByte == sizeof(char) ){
			return 0;
		}
		c = pVal->zString[1];
		if( c  == 'x' || c == 'X' ){
			/* Hex digit stream */
			SyHexStrToInt64(pVal->zString,pVal->nByte,(void *)&iVal,0);
		}else if( c == 'b' || c == 'B' ){
			/* Binary digit stream */
			SyBinaryStrToInt64(pVal->zString,pVal->nByte,(void *)&iVal,0);
		}else{
			/* Octal digit stream */
			SyOctalStrToInt64(pVal->zString,pVal->nByte,(void *)&iVal,0);
		}
	}else{
		/* Decimal digit stream */
		SyStrToInt64(pVal->zString,pVal->nByte,(void *)&iVal,0);
	}
	return iVal;
}
/*
 * Return some kind of 64-bit integer value which is the best we can
 * do at representing the value that pObj describes as a string
 * representation.
 */
static sxi64 MemObjStringToInt(ph7_value *pObj)
{
	SyString sVal;
	SyStringInitFromBuf(&sVal,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob));
	return PH7_TokenValueToInt64(&sVal);	
}
/*
 * Call a magic class method [i.e: __toString(),__toInt(),...]
 * Return SXRET_OK if the magic method is available and have been
 * successfully called. Any other return value indicates failure.
 */
static sxi32 MemObjCallClassCastMethod(
	ph7_vm *pVm,               /* VM that trigger the invocation */
	ph7_class_instance *pThis, /* Target class instance [i.e: Object] */
	const char *zMethod,       /* Magic method name [i.e: __toString] */
	sxu32 nLen,                /* Method name length */
	ph7_value *pResult         /* OUT: Store the return value of the magic method here */
	)
{
	ph7_class_method *pMethod;
	/* Check if the method is available */
	pMethod = PH7_ClassExtractMethod(pThis->pClass,zMethod,nLen);
	if( pMethod == 0 ){
		/* No such method */
		return SXERR_NOTFOUND;
	}
	/* Invoke the desired method */
	PH7_VmCallClassMethod(&(*pVm),&(*pThis),pMethod,&(*pResult),0,0);
	/* Method successfully called,pResult should hold the return value */
	return SXRET_OK;
}
/*
 * Return some kind of integer value which is the best we can
 * do at representing the value that pObj describes as an integer.
 * If pObj is an integer, then the value is exact. If pObj is
 * a floating-point then  the value returned is the integer part.
 * If pObj is a string, then we make an attempt to convert it into
 * a integer and return that. 
 * If pObj represents a NULL value, return 0.
 */
static sxi64 MemObjIntValue(ph7_value *pObj)
{
	sxi32 iFlags;
	iFlags = pObj->iFlags;
	if (iFlags & MEMOBJ_REAL ){
		return MemObjRealToInt(&(*pObj));
	}else if( iFlags & (MEMOBJ_INT|MEMOBJ_BOOL) ){
		return pObj->x.iVal;
	}else if (iFlags & MEMOBJ_STRING) {
		return MemObjStringToInt(&(*pObj));
	}else if( iFlags & MEMOBJ_NULL ){
		return 0;
	}else if( iFlags & MEMOBJ_HASHMAP ){
		ph7_hashmap *pMap = (ph7_hashmap *)pObj->x.pOther;
		sxu32 n = pMap->nEntry;
		PH7_HashmapUnref(pMap);
		/* Return total number of entries in the hashmap */
		return n; 
	}else if( iFlags & MEMOBJ_OBJ ){
		ph7_value sResult;
		sxi64 iVal = 1;
		sxi32 rc;
		/* Invoke the [__toInt()] magic method if available [note that this is a symisc extension]  */
		PH7_MemObjInit(pObj->pVm,&sResult);
		rc = MemObjCallClassCastMethod(pObj->pVm,(ph7_class_instance *)pObj->x.pOther,
			"__toInt",sizeof("__toInt")-1,&sResult);
		if( rc == SXRET_OK && (sResult.iFlags & MEMOBJ_INT) ){
			/* Extract method return value */
			iVal = sResult.x.iVal;
		}
		PH7_ClassInstanceUnref((ph7_class_instance *)pObj->x.pOther);
		PH7_MemObjRelease(&sResult);
		return iVal;
	}else if(iFlags & MEMOBJ_RES ){
		return pObj->x.pOther != 0;
	}
	/* CANT HAPPEN */
	return 0;
}
/*
 * Return some kind of real value which is the best we can
 * do at representing the value that pObj describes as a real.
 * If pObj is a real, then the value is exact.If pObj is an
 * integer then the integer  is promoted to real and that value
 * is returned.
 * If pObj is a string, then we make an attempt to convert it
 * into a real and return that. 
 * If pObj represents a NULL value, return 0.0
 */
static ph7_real MemObjRealValue(ph7_value *pObj)
{
	sxi32 iFlags;
	iFlags = pObj->iFlags;
	if( iFlags & MEMOBJ_REAL ){
		return pObj->rVal;
	}else if (iFlags & (MEMOBJ_INT|MEMOBJ_BOOL) ){
		return (ph7_real)pObj->x.iVal;
	}else if (iFlags & MEMOBJ_STRING){
		SyString sString;
#ifdef PH7_OMIT_FLOATING_POINT
		ph7_real rVal = 0;
#else
		ph7_real rVal = 0.0;
#endif
		SyStringInitFromBuf(&sString,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob));
		if( SyBlobLength(&pObj->sBlob) > 0 ){
			/* Convert as much as we can */
#ifdef PH7_OMIT_FLOATING_POINT
			rVal = MemObjStringToInt(&(*pObj));
#else
			SyStrToReal(sString.zString,sString.nByte,(void *)&rVal,0);
#endif
		}
		return rVal;
	}else if( iFlags & MEMOBJ_NULL ){
#ifdef PH7_OMIT_FLOATING_POINT
		return 0;
#else
		return 0.0;
#endif
	}else if( iFlags & MEMOBJ_HASHMAP ){
		/* Return the total number of entries in the hashmap */
		ph7_hashmap *pMap = (ph7_hashmap *)pObj->x.pOther;
		ph7_real n = (ph7_real)pMap->nEntry;
		PH7_HashmapUnref(pMap);
		return n;
	}else if( iFlags & MEMOBJ_OBJ ){
		ph7_value sResult;
		ph7_real rVal = 1;
		sxi32 rc;
		/* Invoke the [__toFloat()] magic method if available [note that this is a symisc extension]  */
		PH7_MemObjInit(pObj->pVm,&sResult);
		rc = MemObjCallClassCastMethod(pObj->pVm,(ph7_class_instance *)pObj->x.pOther,
			"__toFloat",sizeof("__toFloat")-1,&sResult);
		if( rc == SXRET_OK && (sResult.iFlags & MEMOBJ_REAL) ){
			/* Extract method return value */
			rVal = sResult.rVal;
		}
		PH7_ClassInstanceUnref((ph7_class_instance *)pObj->x.pOther);
		PH7_MemObjRelease(&sResult);
		return rVal;
	}else if(iFlags & MEMOBJ_RES ){
		return (ph7_real)(pObj->x.pOther != 0);
	}
	/* NOT REACHED  */
	return 0;
}
/* 
 * Return the string representation of a given ph7_value.
 * This function never fail and always return SXRET_OK.
 */
static sxi32 MemObjStringValue(SyBlob *pOut,ph7_value *pObj,sxu8 bStrictBool)
{
	if( pObj->iFlags & MEMOBJ_REAL ){
		SyBlobFormat(&(*pOut),"%.15g",pObj->rVal);
	}else if( pObj->iFlags & MEMOBJ_INT ){
		SyBlobFormat(&(*pOut),"%qd",pObj->x.iVal);
		/* %qd (BSD quad) is equivalent to %lld in the libc printf */
	}else if( pObj->iFlags & MEMOBJ_BOOL ){
		if( pObj->x.iVal ){
			SyBlobAppend(&(*pOut),"TRUE",sizeof("TRUE")-1);
		}else{
			if( !bStrictBool ){
				SyBlobAppend(&(*pOut),"FALSE",sizeof("FALSE")-1);
			}
		}
	}else if( pObj->iFlags & MEMOBJ_HASHMAP ){
		SyBlobAppend(&(*pOut),"Array",sizeof("Array")-1);
		PH7_HashmapUnref((ph7_hashmap *)pObj->x.pOther);
	}else if( pObj->iFlags & MEMOBJ_OBJ ){
		ph7_value sResult;
		sxi32 rc;
		/* Invoke the __toString() method if available */
		PH7_MemObjInit(pObj->pVm,&sResult);
		rc = MemObjCallClassCastMethod(pObj->pVm,(ph7_class_instance *)pObj->x.pOther,
			"__toString",sizeof("__toString")-1,&sResult);
		if( rc == SXRET_OK && (sResult.iFlags & MEMOBJ_STRING) && SyBlobLength(&sResult.sBlob) > 0){
			/* Expand method return value */
			SyBlobDup(&sResult.sBlob,pOut);
		}else{
			/* Expand "Object" as requested by the PHP language reference manual */
			SyBlobAppend(&(*pOut),"Object",sizeof("Object")-1);
		}
		PH7_ClassInstanceUnref((ph7_class_instance *)pObj->x.pOther);
		PH7_MemObjRelease(&sResult);
	}else if(pObj->iFlags & MEMOBJ_RES ){
		SyBlobFormat(&(*pOut),"ResourceID_%#x",pObj->x.pOther);
	}
	return SXRET_OK;
}
/*
 * Return some kind of boolean value which is the best we can do
 * at representing the value that pObj describes as a boolean.
 * When converting to boolean, the following values are considered FALSE:
 * NULL
 * the boolean FALSE itself.
 * the integer 0 (zero).
 * the real 0.0 (zero).
 * the empty string,a stream of zero [i.e: "0","00","000",...] and the string
 * "false".
 * an array with zero elements. 
 */
static sxi32 MemObjBooleanValue(ph7_value *pObj)
{
	sxi32 iFlags;	
	iFlags = pObj->iFlags;
	if (iFlags & MEMOBJ_REAL ){
#ifdef PH7_OMIT_FLOATING_POINT
		return pObj->rVal ? 1 : 0;
#else
		return pObj->rVal != 0.0 ? 1 : 0;
#endif
	}else if( iFlags & MEMOBJ_INT ){
		return pObj->x.iVal ? 1 : 0;
	}else if (iFlags & MEMOBJ_STRING) {
		SyString sString;
		SyStringInitFromBuf(&sString,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob));
		if( sString.nByte == 0 ){
			/* Empty string */
			return 0;
		}else if( (sString.nByte == sizeof("true") - 1 && SyStrnicmp(sString.zString,"true",sizeof("true")-1) == 0) ||
			(sString.nByte == sizeof("on") - 1 && SyStrnicmp(sString.zString,"on",sizeof("on")-1) == 0) ||
			(sString.nByte == sizeof("yes") - 1 && SyStrnicmp(sString.zString,"yes",sizeof("yes")-1) == 0) ){
				return 1;
		}else if( sString.nByte == sizeof("false") - 1 && SyStrnicmp(sString.zString,"false",sizeof("false")-1) == 0 ){
			return 0;
		}else{
			const char *zIn,*zEnd;
			zIn = sString.zString;
			zEnd = &zIn[sString.nByte];
			while( zIn < zEnd && zIn[0] == '0' ){
				zIn++;
			}
			return zIn >= zEnd ? 0 : 1;
		}
	}else if( iFlags & MEMOBJ_NULL ){
		return 0;
	}else if( iFlags & MEMOBJ_HASHMAP ){
		ph7_hashmap *pMap = (ph7_hashmap *)pObj->x.pOther;
		sxu32 n = pMap->nEntry;
		PH7_HashmapUnref(pMap);
		return n > 0 ? TRUE : FALSE;
	}else if( iFlags & MEMOBJ_OBJ ){
		ph7_value sResult;
		sxi32 iVal = 1;
		sxi32 rc;
		/* Invoke the __toBool() method if available [note that this is a symisc extension]  */
		PH7_MemObjInit(pObj->pVm,&sResult);
		rc = MemObjCallClassCastMethod(pObj->pVm,(ph7_class_instance *)pObj->x.pOther,
			"__toBool",sizeof("__toBool")-1,&sResult);
		if( rc == SXRET_OK && (sResult.iFlags & (MEMOBJ_INT|MEMOBJ_BOOL)) ){
			/* Extract method return value */
			iVal = (sxi32)(sResult.x.iVal != 0); /* Stupid cc warning -W -Wall -O6 */
		}
		PH7_ClassInstanceUnref((ph7_class_instance *)pObj->x.pOther);
		PH7_MemObjRelease(&sResult);
		return iVal;
	}else if(iFlags & MEMOBJ_RES ){
		return pObj->x.pOther != 0;
	}
	/* NOT REACHED */
	return 0;
}
/*
 * If the ph7_value is of type real,try to make it an integer also.
 */
static sxi32 MemObjTryIntger(ph7_value *pObj)
{
	pObj->x.iVal = MemObjRealToInt(&(*pObj));
  /* Only mark the value as an integer if
  **
  **    (1) the round-trip conversion real->int->real is a no-op, and
  **    (2) The integer is neither the largest nor the smallest
  **        possible integer
  **
  ** The second and third terms in the following conditional enforces
  ** the second condition under the assumption that addition overflow causes
  ** values to wrap around.  On x86 hardware, the third term is always
  ** true and could be omitted.  But we leave it in because other
  ** architectures might behave differently.
  */
	if( pObj->rVal ==(ph7_real)pObj->x.iVal && pObj->x.iVal>SMALLEST_INT64
      && pObj->x.iVal<LARGEST_INT64 ){
		  pObj->iFlags |= MEMOBJ_INT;
	}
	return SXRET_OK;
}
/*
 * Convert a ph7_value to type integer.Invalidate any prior representations.
 */
PH7_PRIVATE sxi32 PH7_MemObjToInteger(ph7_value *pObj)
{
	if( (pObj->iFlags & MEMOBJ_INT) == 0 ){
		/* Preform the conversion */
		pObj->x.iVal = MemObjIntValue(&(*pObj));
		/* Invalidate any prior representations */
		SyBlobRelease(&pObj->sBlob);
		MemObjSetType(pObj,MEMOBJ_INT);
	}
	return SXRET_OK;
}
/*
 * Convert a ph7_value to type real (Try to get an integer representation also).
 * Invalidate any prior representations
 */
PH7_PRIVATE sxi32 PH7_MemObjToReal(ph7_value *pObj)
{
	if((pObj->iFlags & MEMOBJ_REAL) == 0 ){
		/* Preform the conversion */
		pObj->rVal = MemObjRealValue(&(*pObj));
		/* Invalidate any prior representations */
		SyBlobRelease(&pObj->sBlob);
		MemObjSetType(pObj,MEMOBJ_REAL);
		/* Try to get an integer representation */
		MemObjTryIntger(&(*pObj));
	}
	return SXRET_OK;
}
/*
 * Convert a ph7_value to type boolean.Invalidate any prior representations.
 */
PH7_PRIVATE sxi32 PH7_MemObjToBool(ph7_value *pObj)
{
	if( (pObj->iFlags & MEMOBJ_BOOL) == 0 ){
		/* Preform the conversion */
		pObj->x.iVal = MemObjBooleanValue(&(*pObj));
		/* Invalidate any prior representations */
		SyBlobRelease(&pObj->sBlob);
		MemObjSetType(pObj,MEMOBJ_BOOL);
	}
	return SXRET_OK;
}
/*
 * Convert a ph7_value to type string.Prior representations are NOT invalidated.
 */
PH7_PRIVATE sxi32 PH7_MemObjToString(ph7_value *pObj)
{
	sxi32 rc = SXRET_OK;
	if( (pObj->iFlags & MEMOBJ_STRING) == 0 ){
		/* Perform the conversion */
		SyBlobReset(&pObj->sBlob); /* Reset the internal buffer */
		rc = MemObjStringValue(&pObj->sBlob,&(*pObj),TRUE);
		MemObjSetType(pObj,MEMOBJ_STRING);
	}
	return rc;
}
/*
 * Nullify a ph7_value.In other words invalidate any prior
 * representation.
 */
PH7_PRIVATE sxi32 PH7_MemObjToNull(ph7_value *pObj)
{
	return PH7_MemObjRelease(pObj);
}
/*
 * Convert a ph7_value to type array.Invalidate any prior representations.
  * According to the PHP language reference manual.
  *   For any of the types: integer, float, string, boolean converting a value
  *   to an array results in an array with a single element with index zero 
  *   and the value of the scalar which was converted.
  */
PH7_PRIVATE sxi32 PH7_MemObjToHashmap(ph7_value *pObj)
{
	if( (pObj->iFlags & MEMOBJ_HASHMAP) == 0 ){
		ph7_hashmap *pMap;
		/* Allocate a new hashmap instance */
		pMap = PH7_NewHashmap(pObj->pVm,0,0);
		if( pMap == 0 ){
			return SXERR_MEM;
		}
		if( (pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_RES)) == 0 ){
			/* 
			 * According to the PHP language reference manual.
			 *   For any of the types: integer, float, string, boolean converting a value
			 *   to an array results in an array with a single element with index zero 
			 *   and the value of the scalar which was converted.
			 */
			if( pObj->iFlags & MEMOBJ_OBJ ){
				/* Object cast */
				PH7_ClassInstanceToHashmap((ph7_class_instance *)pObj->x.pOther,pMap);
			}else{
				/* Insert a single element */
				PH7_HashmapInsert(pMap,0/* Automatic index assign */,&(*pObj));
			}
			SyBlobRelease(&pObj->sBlob);
		}
		/* Invalidate any prior representation */
		MemObjSetType(pObj,MEMOBJ_HASHMAP);
		pObj->x.pOther = pMap;
	}
	return SXRET_OK;
}
/*
 * Convert a ph7_value to type object.Invalidate any prior representations.
 * The new object is instantiated from the builtin stdClass().
 * The stdClass() class have a single attribute which is '$value'. This attribute
 * hold a copy of the converted ph7_value.
 * The internal of the stdClass is as follows:
 * class stdClass{
 *	 public $value;
 *	 public function __toInt(){ return (int)$this->value; }
 *	 public function __toBool(){ return (bool)$this->value; }
 *	 public function __toFloat(){ return (float)$this->value; }
 *	 public function __toString(){ return (string)$this->value; }
 *	 function __construct($v){ $this->value = $v; }"
 *  }
 * Refer to the official documentation for more information.
 */
PH7_PRIVATE sxi32 PH7_MemObjToObject(ph7_value *pObj)
{
	if( (pObj->iFlags & MEMOBJ_OBJ) == 0 ){
		ph7_class_instance *pStd;
		ph7_class_method *pCons;
		ph7_class *pClass;
		ph7_vm *pVm;
		/* Point to the underlying VM */
		pVm = pObj->pVm;
		/* Point to the stdClass() */
		pClass = PH7_VmExtractClass(pVm,"stdClass",sizeof("stdClass")-1,0,0);
		if( pClass == 0 ){
			/* Can't happen,load null instead */
			PH7_MemObjRelease(pObj);
			return SXRET_OK;
		}
		/* Instanciate a new stdClass() object */
		pStd = PH7_NewClassInstance(pVm,pClass);
		if( pStd == 0 ){
			/* Out of memory */
			PH7_MemObjRelease(pObj);
			return SXRET_OK;
		}
		/* Check if a constructor is available */
		pCons = PH7_ClassExtractMethod(pClass,"__construct",sizeof("__construct")-1);
		if( pCons ){
			ph7_value *apArg[2];
			/* Invoke the constructor with one argument */
			apArg[0] = pObj;
			PH7_VmCallClassMethod(pVm,pStd,pCons,0,1,apArg);
			if( pStd->iRef < 1 ){
				pStd->iRef = 1;
			}
		}
		/* Invalidate any prior representation */
		PH7_MemObjRelease(pObj);
		/* Save the new instance */
		pObj->x.pOther = pStd;
		MemObjSetType(pObj,MEMOBJ_OBJ);
	}
	return SXRET_OK;
}
/*
 * Return a pointer to the appropriate convertion method associated 
 * with the given type. 
 * Note on type juggling.
 * Accoding to the PHP language reference manual
 *  PHP does not require (or support) explicit type definition in variable
 *  declaration; a variable's type is determined by the context in which
 *  the variable is used. That is to say, if a string value is assigned 
 *  to variable $var, $var becomes a string. If an integer value is then
 *  assigned to $var, it becomes an integer. 
 */
PH7_PRIVATE ProcMemObjCast PH7_MemObjCastMethod(sxi32 iFlags)
{
	if( iFlags & MEMOBJ_STRING ){
		return PH7_MemObjToString;
	}else if( iFlags & MEMOBJ_INT ){
		return PH7_MemObjToInteger;
	}else if( iFlags & MEMOBJ_REAL ){
		return PH7_MemObjToReal;
	}else if( iFlags & MEMOBJ_BOOL ){
		return PH7_MemObjToBool;
	}else if( iFlags & MEMOBJ_HASHMAP ){
		return PH7_MemObjToHashmap;
	}else if( iFlags & MEMOBJ_OBJ ){
		return PH7_MemObjToObject;
	}
	/* NULL cast */
	return PH7_MemObjToNull;
}
/*
 * Check whether the ph7_value is numeric [i.e: int/float/bool] or looks
 * like a numeric number [i.e: if the ph7_value is of type string.].
 * Return TRUE if numeric.FALSE otherwise.
 */
PH7_PRIVATE sxi32 PH7_MemObjIsNumeric(ph7_value *pObj)
{
	if( pObj->iFlags & ( MEMOBJ_BOOL|MEMOBJ_INT|MEMOBJ_REAL) ){
		return TRUE;
	}else if( pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES) ){
		return FALSE;
	}else if( pObj->iFlags & MEMOBJ_STRING ){
		SyString sStr;
		sxi32 rc;
		SyStringInitFromBuf(&sStr,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob));
		if( sStr.nByte <= 0 ){
			/* Empty string */
			return FALSE;
		}
		/* Check if the string representation looks like a numeric number */
		rc = SyStrIsNumeric(sStr.zString,sStr.nByte,0,0);
		return rc == SXRET_OK ? TRUE : FALSE;
	}
	/* NOT REACHED */
	return FALSE;
}
/*
 * Check whether the ph7_value is empty.Return TRUE if empty.
 * FALSE otherwise.
 * An ph7_value is considered empty if the following are true:
 * NULL value.
 * Boolean FALSE.
 * Integer/Float with a 0 (zero) value.
 * An empty string or a stream of 0 (zero) [i.e: "0","00","000",...].
 * An empty array.
 * NOTE
 *  OBJECT VALUE MUST NOT BE MODIFIED.
 */
PH7_PRIVATE sxi32 PH7_MemObjIsEmpty(ph7_value *pObj)
{
	if( pObj->iFlags & MEMOBJ_NULL ){
		return TRUE;
	}else if( pObj->iFlags & MEMOBJ_INT ){
		return pObj->x.iVal == 0 ? TRUE : FALSE;
	}else if( pObj->iFlags & MEMOBJ_REAL ){
		return pObj->rVal == (ph7_real)0 ? TRUE : FALSE;
	}else if( pObj->iFlags & MEMOBJ_BOOL ){
		return !pObj->x.iVal;
	}else if( pObj->iFlags & MEMOBJ_STRING ){
		if( SyBlobLength(&pObj->sBlob) <= 0 ){
			return TRUE;
		}else{
			const char *zIn,*zEnd;
			zIn = (const char *)SyBlobData(&pObj->sBlob);
			zEnd = &zIn[SyBlobLength(&pObj->sBlob)];
			while( zIn < zEnd ){
				if( zIn[0] != '0' ){
					break;
				}
				zIn++;
			}
			return zIn >= zEnd ? TRUE : FALSE;
		}
	}else if( pObj->iFlags & MEMOBJ_HASHMAP ){
		ph7_hashmap *pMap = (ph7_hashmap *)pObj->x.pOther;
		return pMap->nEntry == 0 ? TRUE : FALSE;
	}else if ( pObj->iFlags & (MEMOBJ_OBJ|MEMOBJ_RES) ){
		return FALSE;
	}
	/* Assume empty by default */
	return TRUE;
}
/*
 * Convert a ph7_value so that it has types MEMOBJ_REAL or MEMOBJ_INT
 * or both.
 * Invalidate any prior representations. Every effort is made to force
 * the conversion, even if the input is a string that does not look 
 * completely like a number.Convert as much of the string as we can
 * and ignore the rest.
 */
PH7_PRIVATE sxi32 PH7_MemObjToNumeric(ph7_value *pObj)
{
	if( pObj->iFlags & (MEMOBJ_INT|MEMOBJ_REAL|MEMOBJ_BOOL|MEMOBJ_NULL) ){
		if( pObj->iFlags & (MEMOBJ_BOOL|MEMOBJ_NULL) ){
			if( pObj->iFlags & MEMOBJ_NULL ){
				pObj->x.iVal = 0;
			}
			MemObjSetType(pObj,MEMOBJ_INT);
		}
		/* Already numeric */
		return  SXRET_OK;
	}
	if( pObj->iFlags & MEMOBJ_STRING ){
		sxi32 rc = SXERR_INVALID;
		sxu8 bReal = FALSE;
		SyString sString;
		SyStringInitFromBuf(&sString,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob));
		/* Check if the given string looks like a numeric number */
		if( sString.nByte > 0 ){
			rc = SyStrIsNumeric(sString.zString,sString.nByte,&bReal,0);
		}
		if( bReal ){
			PH7_MemObjToReal(&(*pObj));
		}else{
			if( rc != SXRET_OK ){
				/* The input does not look at all like a number,set the value to 0 */
				pObj->x.iVal = 0;
			}else{
				/* Convert as much as we can */
				pObj->x.iVal = MemObjStringToInt(&(*pObj));
			}
			MemObjSetType(pObj,MEMOBJ_INT);
			SyBlobRelease(&pObj->sBlob);
		}
	}else if(pObj->iFlags & (MEMOBJ_OBJ|MEMOBJ_HASHMAP|MEMOBJ_RES)){
		PH7_MemObjToInteger(pObj);
	}else{
		/* Perform a blind cast */
		PH7_MemObjToReal(&(*pObj));
	}
	return SXRET_OK;
}
/*
 * Try a get an integer representation of the given ph7_value.
 * If the ph7_value is not of type real,this function is a no-op.
 */
PH7_PRIVATE sxi32 PH7_MemObjTryInteger(ph7_value *pObj)
{
	if( pObj->iFlags & MEMOBJ_REAL ){
		/* Work only with reals */
		MemObjTryIntger(&(*pObj));
	}
	return SXRET_OK;
}
/*
 * Initialize a ph7_value to the null type.
 */
PH7_PRIVATE sxi32 PH7_MemObjInit(ph7_vm *pVm,ph7_value *pObj)
{
	/* Zero the structure */
	SyZero(pObj,sizeof(ph7_value));
	/* Initialize fields */
	pObj->pVm = pVm;
	SyBlobInit(&pObj->sBlob,&pVm->sAllocator);
	/* Set the NULL type */
	pObj->iFlags = MEMOBJ_NULL;
	return SXRET_OK;
}
/*
 * Initialize a ph7_value to the integer type.
 */
PH7_PRIVATE sxi32 PH7_MemObjInitFromInt(ph7_vm *pVm,ph7_value *pObj,sxi64 iVal)
{
	/* Zero the structure */
	SyZero(pObj,sizeof(ph7_value));
	/* Initialize fields */
	pObj->pVm = pVm;
	SyBlobInit(&pObj->sBlob,&pVm->sAllocator);
	/* Set the desired type */
	pObj->x.iVal = iVal;
	pObj->iFlags = MEMOBJ_INT;
	return SXRET_OK;
}
/*
 * Initialize a ph7_value to the boolean type.
 */
PH7_PRIVATE sxi32 PH7_MemObjInitFromBool(ph7_vm *pVm,ph7_value *pObj,sxi32 iVal)
{
	/* Zero the structure */
	SyZero(pObj,sizeof(ph7_value));
	/* Initialize fields */
	pObj->pVm = pVm;
	SyBlobInit(&pObj->sBlob,&pVm->sAllocator);
	/* Set the desired type */
	pObj->x.iVal = iVal ? 1 : 0;
	pObj->iFlags = MEMOBJ_BOOL;
	return SXRET_OK;
}
#if 0
/*
 * Initialize a ph7_value to the real type.
 */
PH7_PRIVATE sxi32 PH7_MemObjInitFromReal(ph7_vm *pVm,ph7_value *pObj,ph7_real rVal)
{
	/* Zero the structure */
	SyZero(pObj,sizeof(ph7_value));
	/* Initialize fields */
	pObj->pVm = pVm;
	SyBlobInit(&pObj->sBlob,&pVm->sAllocator);
	/* Set the desired type */
	pObj->rVal = rVal;
	pObj->iFlags = MEMOBJ_REAL;
	return SXRET_OK;
}
#endif
/*
 * Initialize a ph7_value to the array type.
 */
PH7_PRIVATE sxi32 PH7_MemObjInitFromArray(ph7_vm *pVm,ph7_value *pObj,ph7_hashmap *pArray)
{
	/* Zero the structure */
	SyZero(pObj,sizeof(ph7_value));
	/* Initialize fields */
	pObj->pVm = pVm;
	SyBlobInit(&pObj->sBlob,&pVm->sAllocator);
	/* Set the desired type */
	pObj->iFlags = MEMOBJ_HASHMAP;
	pObj->x.pOther = pArray;
	return SXRET_OK;
}
/*
 * Initialize a ph7_value to the string type.
 */
PH7_PRIVATE sxi32 PH7_MemObjInitFromString(ph7_vm *pVm,ph7_value *pObj,const SyString *pVal)
{
	/* Zero the structure */
	SyZero(pObj,sizeof(ph7_value));
	/* Initialize fields */
	pObj->pVm = pVm;
	SyBlobInit(&pObj->sBlob,&pVm->sAllocator);
	if( pVal ){
		/* Append contents */
		SyBlobAppend(&pObj->sBlob,(const void *)pVal->zString,pVal->nByte);
	}
	/* Set the desired type */
	pObj->iFlags = MEMOBJ_STRING;
	return SXRET_OK;
}
/*
 * Append some contents to the internal buffer of a given ph7_value.
 * If the given ph7_value is not of type string,this function
 * invalidate any prior representation and set the string type.
 * Then a simple append operation is performed.
 */
PH7_PRIVATE sxi32 PH7_MemObjStringAppend(ph7_value *pObj,const char *zData,sxu32 nLen)
{
	sxi32 rc;
	if( (pObj->iFlags & MEMOBJ_STRING) == 0 ){
		/* Invalidate any prior representation */
		PH7_MemObjRelease(pObj);
		MemObjSetType(pObj,MEMOBJ_STRING);
	}
	/* Append contents */
	rc = SyBlobAppend(&pObj->sBlob,zData,nLen);
	return rc;
}
#if 0
/*
 * Format and append some contents to the internal buffer of a given ph7_value.
 * If the given ph7_value is not of type string,this function invalidate
 * any prior representation and set the string type.
 * Then a simple format and append operation is performed.
 */
PH7_PRIVATE sxi32 PH7_MemObjStringFormat(ph7_value *pObj,const char *zFormat,va_list ap)
{
	sxi32 rc;
	if( (pObj->iFlags & MEMOBJ_STRING) == 0 ){
		/* Invalidate any prior representation */
		PH7_MemObjRelease(pObj);
		MemObjSetType(pObj,MEMOBJ_STRING);
	}
	/* Format and append contents */
	rc = SyBlobFormatAp(&pObj->sBlob,zFormat,ap);
	return rc;
}
#endif
/*
 * Duplicate the contents of a ph7_value.
 */
PH7_PRIVATE sxi32 PH7_MemObjStore(ph7_value *pSrc,ph7_value *pDest)
{
	ph7_class_instance *pObj = 0;
	ph7_hashmap *pMap = 0;
	sxi32 rc;
	if( pSrc->iFlags & MEMOBJ_HASHMAP ){
		/* Increment reference count */
		((ph7_hashmap *)pSrc->x.pOther)->iRef++;
	}else if( pSrc->iFlags & MEMOBJ_OBJ ){
		/* Increment reference count */
		((ph7_class_instance *)pSrc->x.pOther)->iRef++;
	}
	if( pDest->iFlags & MEMOBJ_HASHMAP ){
		pMap = (ph7_hashmap *)pDest->x.pOther;
	}else if( pDest->iFlags & MEMOBJ_OBJ ){
		pObj = (ph7_class_instance *)pDest->x.pOther;
	}
	SyMemcpy((const void *)&(*pSrc),&(*pDest),sizeof(ph7_value)-(sizeof(ph7_vm *)+sizeof(SyBlob)+sizeof(sxu32)));
	pDest->iFlags &= ~MEMOBJ_AUX;
	rc = SXRET_OK;
	if( SyBlobLength(&pSrc->sBlob) > 0 ){
		SyBlobReset(&pDest->sBlob);
		rc = SyBlobDup(&pSrc->sBlob,&pDest->sBlob);
	}else{
		if( SyBlobLength(&pDest->sBlob) > 0 ){
			SyBlobRelease(&pDest->sBlob);
		}
	}
	if( pMap ){
		PH7_HashmapUnref(pMap);
	}else if( pObj ){
		PH7_ClassInstanceUnref(pObj);
	}
	return rc;
}
/*
 * Duplicate the contents of a ph7_value but do not copy internal
 * buffer contents,simply point to it.
 */
PH7_PRIVATE sxi32 PH7_MemObjLoad(ph7_value *pSrc,ph7_value *pDest)
{
	SyMemcpy((const void *)&(*pSrc),&(*pDest),
		sizeof(ph7_value)-(sizeof(ph7_vm *)+sizeof(SyBlob)+sizeof(sxu32)));
	if( pSrc->iFlags & MEMOBJ_HASHMAP ){
		/* Increment reference count */
		((ph7_hashmap *)pSrc->x.pOther)->iRef++;
	}else if( pSrc->iFlags & MEMOBJ_OBJ ){
		/* Increment reference count */
		((ph7_class_instance *)pSrc->x.pOther)->iRef++;
	}
	if( SyBlobLength(&pDest->sBlob) > 0 ){
		SyBlobRelease(&pDest->sBlob);
	}
	if( SyBlobLength(&pSrc->sBlob) > 0 ){
		SyBlobReadOnly(&pDest->sBlob,SyBlobData(&pSrc->sBlob),SyBlobLength(&pSrc->sBlob));
	}
	return SXRET_OK;
}
/*
 * Invalidate any prior representation of a given ph7_value.
 */
PH7_PRIVATE sxi32 PH7_MemObjRelease(ph7_value *pObj)
{
	if( (pObj->iFlags & MEMOBJ_NULL) == 0 ){
		if( pObj->iFlags & MEMOBJ_HASHMAP ){
			PH7_HashmapUnref((ph7_hashmap *)pObj->x.pOther);
		}else if( pObj->iFlags & MEMOBJ_OBJ ){
			PH7_ClassInstanceUnref((ph7_class_instance *)pObj->x.pOther);
		}
		/* Release the internal buffer */
		SyBlobRelease(&pObj->sBlob);
		/* Invalidate any prior representation */
		pObj->iFlags = MEMOBJ_NULL;
	}
	return SXRET_OK;
}
/*
 * Compare two ph7_values.
 * Return 0 if the values are equals, > 0 if pObj1 is greater than pObj2
 * or < 0 if pObj2 is greater than pObj1.
 * Type comparison table taken from the PHP language reference manual.
 * Comparisons of $x with PHP functions Expression
 *              gettype() 	empty() 	is_null() 	isset() 	boolean : if($x)
 * $x = ""; 	string 	    TRUE 	FALSE 	TRUE 	FALSE
 * $x = null 	NULL 	    TRUE 	TRUE 	FALSE 	FALSE
 * var $x; 	    NULL 	TRUE 	TRUE 	FALSE 	FALSE
 * $x is undefined 	NULL 	TRUE 	TRUE 	FALSE 	FALSE
 *  $x = array(); 	array 	TRUE 	FALSE 	TRUE 	FALSE
 * $x = false; 	boolean 	TRUE 	FALSE 	TRUE 	FALSE
 * $x = true; 	boolean 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = 1; 	    integer 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = 42; 	integer 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = 0; 	    integer 	TRUE 	FALSE 	TRUE 	FALSE
 * $x = -1; 	integer 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = "1"; 	string 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = "0"; 	string 	TRUE 	FALSE 	TRUE 	FALSE
 * $x = "-1"; 	string 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = "php"; 	string 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = "true"; string 	FALSE 	FALSE 	TRUE 	TRUE
 * $x = "false"; string 	FALSE 	FALSE 	TRUE 	TRUE
 *      Loose comparisons with == 
 * TRUE 	FALSE 	1 	0 	-1 	"1" 	"0" 	"-1" 	NULL 	array() 	"php" 	""
 * TRUE 	TRUE 	FALSE 	TRUE 	FALSE 	TRUE 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE
 * FALSE 	FALSE 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	TRUE 	TRUE 	FALSE 	TRUE
 * 1 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * 0 	FALSE 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	TRUE 	FALSE 	TRUE 	TRUE
 * -1 	TRUE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE
 * "1" 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * "0" 	FALSE 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * "-1" 	TRUE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE
 * NULL 	FALSE 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	TRUE 	FALSE 	TRUE
 * array() 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	TRUE 	FALSE 	FALSE
 * "php" 	TRUE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE
 * "" 	FALSE 	TRUE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	TRUE
 *    Strict comparisons with === 
 * TRUE 	FALSE 	1 	0 	-1 	"1" 	"0" 	"-1" 	NULL 	array() 	"php" 	""
 * TRUE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * 1 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * 0 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * -1 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * "1" 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * "0" 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE
 * "-1" 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE 	FALSE 
 * NULL 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE 	FALSE
 * array() 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE 	FALSE
 * "php" 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE 	FALSE
 * "" 	    FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	FALSE 	TRUE
 */
PH7_PRIVATE sxi32 PH7_MemObjCmp(ph7_value *pObj1,ph7_value *pObj2,int bStrict,int iNest)
{
	sxi32 iComb; 
	sxi32 rc;
	if( bStrict ){
		sxi32 iF1,iF2;
		/* Strict comparisons with === */
		iF1 = pObj1->iFlags&~MEMOBJ_AUX;
		iF2 = pObj2->iFlags&~MEMOBJ_AUX;
		if( iF1 != iF2 ){
			/* Not of the same type */
			return 1;
		}
	}
	/* Combine flag together */
	iComb = pObj1->iFlags|pObj2->iFlags;
	if( iComb & (MEMOBJ_NULL|MEMOBJ_RES|MEMOBJ_BOOL) ){
		/* Convert to boolean: Keep in mind FALSE < TRUE */
		if( (pObj1->iFlags & MEMOBJ_BOOL) == 0 ){
			PH7_MemObjToBool(pObj1);
		}
		if( (pObj2->iFlags & MEMOBJ_BOOL) == 0 ){
			PH7_MemObjToBool(pObj2);
		}
		return (sxi32)((pObj1->x.iVal != 0) - (pObj2->x.iVal != 0));
	}else if ( iComb & MEMOBJ_HASHMAP ){
		/* Hashmap aka 'array' comparison */
		if( (pObj1->iFlags & MEMOBJ_HASHMAP) == 0 ){
			/* Array is always greater */
			return -1;
		}
		if( (pObj2->iFlags & MEMOBJ_HASHMAP) == 0 ){
			/* Array is always greater */
			return 1;
		}
		/* Perform the comparison */
		rc = PH7_HashmapCmp((ph7_hashmap *)pObj1->x.pOther,(ph7_hashmap *)pObj2->x.pOther,bStrict);
		return rc;
	}else if(iComb & MEMOBJ_OBJ ){
		/* Object comparison */
		if( (pObj1->iFlags & MEMOBJ_OBJ) == 0 ){
			/* Object is always greater */
			return -1;
		}
		if( (pObj2->iFlags & MEMOBJ_OBJ) == 0 ){
			/* Object is always greater */
			return 1;
		}
		/* Perform the comparison */
		rc = PH7_ClassInstanceCmp((ph7_class_instance *)pObj1->x.pOther,(ph7_class_instance *)pObj2->x.pOther,bStrict,iNest);
		return rc;
	}else if ( iComb & MEMOBJ_STRING ){
		SyString s1,s2;
		if( !bStrict ){
			/*
			 * According to the PHP language reference manual:
			 *
			 *  If you compare a number with a string or the comparison involves numerical
			 *  strings, then each string is converted to a number and the comparison
			 *  performed numerically.
			 */
			if( PH7_MemObjIsNumeric(pObj1) ){
				/* Perform a numeric comparison */
				goto Numeric;
			}
			if( PH7_MemObjIsNumeric(pObj2) ){
				/* Perform a numeric comparison */
				goto Numeric;
			}
		}
		/* Perform a strict string comparison.*/
		if( (pObj1->iFlags&MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(pObj1);
		}
		if( (pObj2->iFlags&MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(pObj2);
		}
		SyStringInitFromBuf(&s1,SyBlobData(&pObj1->sBlob),SyBlobLength(&pObj1->sBlob));
		SyStringInitFromBuf(&s2,SyBlobData(&pObj2->sBlob),SyBlobLength(&pObj2->sBlob));
		/*
		 * Strings are compared using memcmp(). If one value is an exact prefix of the
		 * other, then the shorter value is less than the longer value.
		 */
		rc = SyMemcmp((const void *)s1.zString,(const void *)s2.zString,SXMIN(s1.nByte,s2.nByte));
		if( rc == 0 ){
			if( s1.nByte != s2.nByte ){
				rc = s1.nByte < s2.nByte ? -1 : 1;
			}
		}
		return rc;
	}else if( iComb & (MEMOBJ_INT|MEMOBJ_REAL) ){
Numeric:
		/* Perform a numeric comparison if one of the operand is numeric(integer or real) */
		if( (pObj1->iFlags & (MEMOBJ_INT|MEMOBJ_REAL)) == 0 ){
			PH7_MemObjToNumeric(pObj1);
		}
		if( (pObj2->iFlags & (MEMOBJ_INT|MEMOBJ_REAL)) == 0 ){
			PH7_MemObjToNumeric(pObj2);
		}
		if( (pObj1->iFlags & pObj2->iFlags & MEMOBJ_INT) == 0) {
			/*
			 * Symisc eXtension to the PHP language:
			 *  Floating point comparison is introduced and works as expected.
			 */
			ph7_real r1,r2;
			/* Compare as reals */
			if( (pObj1->iFlags & MEMOBJ_REAL) == 0 ){
				PH7_MemObjToReal(pObj1);
			}
			r1 = pObj1->rVal;	
			if( (pObj2->iFlags & MEMOBJ_REAL) == 0 ){
				PH7_MemObjToReal(pObj2);
			}
			r2 = pObj2->rVal;
			if( r1 > r2 ){
				return 1;
			}else if( r1 < r2 ){
				return -1;
			}
			return 0;
		}else{
			/* Integer comparison */
			if( pObj1->x.iVal > pObj2->x.iVal ){
				return 1;
			}else if( pObj1->x.iVal < pObj2->x.iVal ){
				return -1;
			}
			return 0;
		}
	}
	/* NOT REACHED */
	return 0;
}
/*
 * Perform an addition operation of two ph7_values.
 * The reason this function is implemented here rather than 'vm.c'
 * is that the '+' operator is overloaded.
 * That is,the '+' operator is used for arithmetic operation and also 
 * used for operation on arrays [i.e: union]. When used with an array 
 * The + operator returns the right-hand array appended to the left-hand array.
 * For keys that exist in both arrays, the elements from the left-hand array
 * will be used, and the matching elements from the right-hand array will
 * be ignored.
 * This function take care of handling all the scenarios.
 */
PH7_PRIVATE sxi32 PH7_MemObjAdd(ph7_value *pObj1,ph7_value *pObj2,int bAddStore)
{
	if( ((pObj1->iFlags|pObj2->iFlags) & MEMOBJ_HASHMAP) == 0 ){
			/* Arithemtic operation */
			PH7_MemObjToNumeric(pObj1);
			PH7_MemObjToNumeric(pObj2);
			if( (pObj1->iFlags|pObj2->iFlags) & MEMOBJ_REAL ){
				/* Floating point arithmetic */
				ph7_real a,b;
				if( (pObj1->iFlags & MEMOBJ_REAL) == 0 ){
					PH7_MemObjToReal(pObj1);
				}
				if( (pObj2->iFlags & MEMOBJ_REAL) == 0 ){
					PH7_MemObjToReal(pObj2);
				}
				a = pObj1->rVal;
				b = pObj2->rVal;
				pObj1->rVal = a+b;
				MemObjSetType(pObj1,MEMOBJ_REAL);
				/* Try to get an integer representation also */
				MemObjTryIntger(&(*pObj1));
			}else{
				/* Integer arithmetic */
				sxi64 a,b;
				a = pObj1->x.iVal;
				b = pObj2->x.iVal;
				pObj1->x.iVal = a+b;
				MemObjSetType(pObj1,MEMOBJ_INT);
			}
	}else{
		if( (pObj1->iFlags|pObj2->iFlags) & MEMOBJ_HASHMAP ){
			ph7_hashmap *pMap;
			sxi32 rc;
			if( bAddStore ){
				/* Do not duplicate the hashmap,use the left one since its an add&store operation.
				 */
				if( (pObj1->iFlags & MEMOBJ_HASHMAP) == 0 ){				
					/* Force a hashmap cast */
					rc = PH7_MemObjToHashmap(pObj1);
					if( rc != SXRET_OK ){
						PH7_VmThrowError(pObj1->pVm,0,PH7_CTX_ERR,"PH7 is running out of memory while creating array");
						return rc;
					}
				}
				/* Point to the structure that describe the hashmap */
				pMap = (ph7_hashmap *)pObj1->x.pOther;
			}else{
				/* Create a new hashmap */
				pMap = PH7_NewHashmap(pObj1->pVm,0,0);
				if( pMap == 0){
					PH7_VmThrowError(pObj1->pVm,0,PH7_CTX_ERR,"PH7 is running out of memory while creating array");
					return SXERR_MEM;
				}
			}
			if( !bAddStore ){
				if(pObj1->iFlags & MEMOBJ_HASHMAP ){
					/* Perform a hashmap duplication */
					PH7_HashmapDup((ph7_hashmap *)pObj1->x.pOther,pMap);
				}else{
					if((pObj1->iFlags & MEMOBJ_NULL) == 0 ){
						/* Simple insertion */
						PH7_HashmapInsert(pMap,0,pObj1);
					}
				}
			}
			/* Perform the union */
			if(pObj2->iFlags & MEMOBJ_HASHMAP ){
				PH7_HashmapUnion(pMap,(ph7_hashmap *)pObj2->x.pOther);
			}else{
				if((pObj2->iFlags & MEMOBJ_NULL) == 0 ){
					/* Simple insertion */
					PH7_HashmapInsert(pMap,0,pObj2);
				}
			}
			/* Reflect the change */
			if( pObj1->iFlags & MEMOBJ_STRING ){
				SyBlobRelease(&pObj1->sBlob);
			}
			pObj1->x.pOther = pMap;
			MemObjSetType(pObj1,MEMOBJ_HASHMAP);
		}
	}
	return SXRET_OK;
}
/*
 * Return a printable representation of the type of a given 
 * ph7_value.
 */
PH7_PRIVATE const char * PH7_MemObjTypeDump(ph7_value *pVal)
{
	const char *zType = "";
	if( pVal->iFlags & MEMOBJ_NULL ){
		zType = "null";
	}else if( pVal->iFlags & MEMOBJ_INT ){
		zType = "int";
	}else if( pVal->iFlags & MEMOBJ_REAL ){
		zType = "float";
	}else if( pVal->iFlags & MEMOBJ_STRING ){
		zType = "string";
	}else if( pVal->iFlags & MEMOBJ_BOOL ){
		zType = "bool";
	}else if( pVal->iFlags & MEMOBJ_HASHMAP ){
		zType = "array";
	}else if( pVal->iFlags & MEMOBJ_OBJ ){
		zType = "object";
	}else if( pVal->iFlags & MEMOBJ_RES ){
		zType = "resource";
	}
	return zType;
}
/*
 * Dump a ph7_value [i.e: get a printable representation of it's type and contents.].
 * Store the dump in the given blob.
 */
PH7_PRIVATE sxi32 PH7_MemObjDump(
	SyBlob *pOut,      /* Store the dump here */
	ph7_value *pObj,   /* Dump this */
	int ShowType,      /* TRUE to output value type */
	int nTab,          /* # of Whitespace to insert */
	int nDepth,        /* Nesting level */
	int isRef          /* TRUE if referenced object */
	)
{
	sxi32 rc = SXRET_OK;
	const char *zType;
	int i;
	for( i = 0 ; i < nTab ; i++ ){
		SyBlobAppend(&(*pOut)," ",sizeof(char));
	}
	if( ShowType ){
		if( isRef ){
			SyBlobAppend(&(*pOut),"&",sizeof(char));
		}
		/* Get value type first */
		zType = PH7_MemObjTypeDump(pObj);
		SyBlobAppend(&(*pOut),zType,SyStrlen(zType));
	}
	if((pObj->iFlags & MEMOBJ_NULL) == 0 ){
		if ( ShowType ){
			SyBlobAppend(&(*pOut),"(",sizeof(char));
		}
		if( pObj->iFlags & MEMOBJ_HASHMAP ){
			/* Dump hashmap entries */
			rc = PH7_HashmapDump(&(*pOut),(ph7_hashmap *)pObj->x.pOther,ShowType,nTab+1,nDepth+1);
		}else if(pObj->iFlags & MEMOBJ_OBJ ){
			/* Dump class instance attributes */
			rc = PH7_ClassInstanceDump(&(*pOut),(ph7_class_instance *)pObj->x.pOther,ShowType,nTab+1,nDepth+1);
		}else{
			SyBlob *pContents = &pObj->sBlob;
			/* Get a printable representation of the contents */
			if((pObj->iFlags & MEMOBJ_STRING) == 0 ){
				MemObjStringValue(&(*pOut),&(*pObj),FALSE);
			}else{
				/* Append length first */
				if( ShowType ){
					SyBlobFormat(&(*pOut),"%u '",SyBlobLength(&pObj->sBlob));
				}
				if( SyBlobLength(pContents) > 0 ){
					SyBlobAppend(&(*pOut),SyBlobData(pContents),SyBlobLength(pContents));
				}
				if( ShowType ){
					SyBlobAppend(&(*pOut),"'",sizeof(char));
				}
			}
		}
		if( ShowType ){
			if( (pObj->iFlags & (MEMOBJ_HASHMAP|MEMOBJ_OBJ)) == 0 ){
				SyBlobAppend(&(*pOut),")",sizeof(char));
			}
		}
	}
#ifdef __WINNT__
	SyBlobAppend(&(*pOut),"\r\n",sizeof("\r\n")-1);
#else
	SyBlobAppend(&(*pOut),"\n",sizeof(char));
#endif
	return rc;
}
/*
 * ----------------------------------------------------------
 * File: lib.c
 * MD5: 1d998050126fa9f31b5a52c757d498cb
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: lib.c v5.1 Win7 2012-08-08 04:19 stable <chm@symisc.net> $ */
/*
 * Symisc Run-Time API: A modern thread safe replacement of the standard libc
 * Copyright (C) Symisc Systems 2007-2012, http://www.symisc.net/
 *
 * The Symisc Run-Time API is an independent project developed by symisc systems
 * internally as a secure replacement of the standard libc.
 * The library is re-entrant,thread-safe and platform independent.
 */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
#if defined(__WINNT__)
#include <Windows.h>
#else
#include <stdlib.h>
#endif
#if defined(PH7_ENABLE_THREADS)
/* SyRunTimeApi: sxmutex.c */
#if defined(__WINNT__)
struct SyMutex
{
	CRITICAL_SECTION sMutex;
	sxu32 nType; /* Mutex type,one of SXMUTEX_TYPE_* */
};
/* Preallocated static mutex */
static SyMutex aStaticMutexes[] = {
		{{0},SXMUTEX_TYPE_STATIC_1},
		{{0},SXMUTEX_TYPE_STATIC_2},
		{{0},SXMUTEX_TYPE_STATIC_3},
		{{0},SXMUTEX_TYPE_STATIC_4},
		{{0},SXMUTEX_TYPE_STATIC_5},
		{{0},SXMUTEX_TYPE_STATIC_6}
};
static BOOL winMutexInit = FALSE;
static LONG winMutexLock = 0;

static sxi32 WinMutexGlobaInit(void)
{
	LONG rc;
	rc = InterlockedCompareExchange(&winMutexLock,1,0);
	if ( rc == 0 ){
		sxu32 n;
		for( n = 0 ; n  < SX_ARRAYSIZE(aStaticMutexes) ; ++n ){
			InitializeCriticalSection(&aStaticMutexes[n].sMutex);
		}
		winMutexInit = TRUE;
	}else{
		/* Someone else is doing this for us */
		while( winMutexInit == FALSE ){
			Sleep(1);
		}
	}
	return SXRET_OK;
}
static void WinMutexGlobalRelease(void)
{
	LONG rc;
	rc = InterlockedCompareExchange(&winMutexLock,0,1);
	if( rc == 1 ){
		/* The first to decrement to zero does the actual global release */
		if( winMutexInit == TRUE ){
			sxu32 n;
			for( n = 0 ; n < SX_ARRAYSIZE(aStaticMutexes) ; ++n ){
				DeleteCriticalSection(&aStaticMutexes[n].sMutex);
			}
			winMutexInit = FALSE;
		}
	}
}
static SyMutex * WinMutexNew(int nType)
{
	SyMutex *pMutex = 0;
	if( nType == SXMUTEX_TYPE_FAST || nType == SXMUTEX_TYPE_RECURSIVE ){
		/* Allocate a new mutex */
		pMutex = (SyMutex *)HeapAlloc(GetProcessHeap(),0,sizeof(SyMutex));
		if( pMutex == 0 ){
			return 0;
		}
		InitializeCriticalSection(&pMutex->sMutex);
	}else{
		/* Use a pre-allocated static mutex */
		if( nType > SXMUTEX_TYPE_STATIC_6 ){
			nType = SXMUTEX_TYPE_STATIC_6;
		}
		pMutex = &aStaticMutexes[nType - 3];
	}
	pMutex->nType = nType;
	return pMutex;
}
static void WinMutexRelease(SyMutex *pMutex)
{
	if( pMutex->nType == SXMUTEX_TYPE_FAST || pMutex->nType == SXMUTEX_TYPE_RECURSIVE ){
		DeleteCriticalSection(&pMutex->sMutex);
		HeapFree(GetProcessHeap(),0,pMutex);
	}
}
static void WinMutexEnter(SyMutex *pMutex)
{
	EnterCriticalSection(&pMutex->sMutex);
}
static sxi32 WinMutexTryEnter(SyMutex *pMutex)
{
#ifdef _WIN32_WINNT
	BOOL rc;
	/* Only WindowsNT platforms */
	rc = TryEnterCriticalSection(&pMutex->sMutex);
	if( rc ){
		return SXRET_OK;
	}else{
		return SXERR_BUSY;
	}
#else
	return SXERR_NOTIMPLEMENTED;
#endif
}
static void WinMutexLeave(SyMutex *pMutex)
{
	LeaveCriticalSection(&pMutex->sMutex);
}
/* Export Windows mutex interfaces */
static const SyMutexMethods sWinMutexMethods = {
	WinMutexGlobaInit,  /* xGlobalInit() */
	WinMutexGlobalRelease, /* xGlobalRelease() */
	WinMutexNew,     /* xNew() */
	WinMutexRelease, /* xRelease() */
	WinMutexEnter,   /* xEnter() */
	WinMutexTryEnter, /* xTryEnter() */
	WinMutexLeave     /* xLeave() */
};
PH7_PRIVATE const SyMutexMethods * SyMutexExportMethods(void)
{
	return &sWinMutexMethods;
}
#elif defined(__UNIXES__)
#include <pthread.h>
struct SyMutex
{
	pthread_mutex_t sMutex;
	sxu32 nType;
};
static SyMutex * UnixMutexNew(int nType)
{
	static SyMutex aStaticMutexes[] = {
		{PTHREAD_MUTEX_INITIALIZER,SXMUTEX_TYPE_STATIC_1},
		{PTHREAD_MUTEX_INITIALIZER,SXMUTEX_TYPE_STATIC_2},
		{PTHREAD_MUTEX_INITIALIZER,SXMUTEX_TYPE_STATIC_3},
		{PTHREAD_MUTEX_INITIALIZER,SXMUTEX_TYPE_STATIC_4},
		{PTHREAD_MUTEX_INITIALIZER,SXMUTEX_TYPE_STATIC_5},
		{PTHREAD_MUTEX_INITIALIZER,SXMUTEX_TYPE_STATIC_6}
	};
	SyMutex *pMutex;
	
	if( nType == SXMUTEX_TYPE_FAST || nType == SXMUTEX_TYPE_RECURSIVE ){
		pthread_mutexattr_t sRecursiveAttr;
  		/* Allocate a new mutex */
  		pMutex = (SyMutex *)malloc(sizeof(SyMutex));
  		if( pMutex == 0 ){
  			return 0;
  		}
  		if( nType == SXMUTEX_TYPE_RECURSIVE ){
  			pthread_mutexattr_init(&sRecursiveAttr);
  			pthread_mutexattr_settype(&sRecursiveAttr,PTHREAD_MUTEX_RECURSIVE);
  		}
  		pthread_mutex_init(&pMutex->sMutex,nType == SXMUTEX_TYPE_RECURSIVE ? &sRecursiveAttr : 0 );
		if(	nType == SXMUTEX_TYPE_RECURSIVE ){
   			pthread_mutexattr_destroy(&sRecursiveAttr);
		}
	}else{
		/* Use a pre-allocated static mutex */
		if( nType > SXMUTEX_TYPE_STATIC_6 ){
			nType = SXMUTEX_TYPE_STATIC_6;
		}
		pMutex = &aStaticMutexes[nType - 3];
	}
  pMutex->nType = nType;
  
  return pMutex;
}
static void UnixMutexRelease(SyMutex *pMutex)
{
	if( pMutex->nType == SXMUTEX_TYPE_FAST || pMutex->nType == SXMUTEX_TYPE_RECURSIVE ){
		pthread_mutex_destroy(&pMutex->sMutex);
		free(pMutex);
	}
}
static void UnixMutexEnter(SyMutex *pMutex)
{
	pthread_mutex_lock(&pMutex->sMutex);
}
static void UnixMutexLeave(SyMutex *pMutex)
{
	pthread_mutex_unlock(&pMutex->sMutex);
}
/* Export pthread mutex interfaces */
static const SyMutexMethods sPthreadMutexMethods = {
	0, /* xGlobalInit() */
	0, /* xGlobalRelease() */
	UnixMutexNew,      /* xNew() */
	UnixMutexRelease,  /* xRelease() */
	UnixMutexEnter,    /* xEnter() */
	0,                 /* xTryEnter() */
	UnixMutexLeave     /* xLeave() */
};
PH7_PRIVATE const SyMutexMethods * SyMutexExportMethods(void)
{
	return &sPthreadMutexMethods;
}
#else
/* Host application must register their own mutex subsystem if the target
 * platform is not an UNIX-like or windows systems.
 */
struct SyMutex
{
	sxu32 nType;
};
static SyMutex * DummyMutexNew(int nType)
{
	static SyMutex sMutex;
	SXUNUSED(nType);
	return &sMutex;
}
static void DummyMutexRelease(SyMutex *pMutex)
{
	SXUNUSED(pMutex);
}
static void DummyMutexEnter(SyMutex *pMutex)
{
	SXUNUSED(pMutex);
}
static void DummyMutexLeave(SyMutex *pMutex)
{
	SXUNUSED(pMutex);
}
/* Export the dummy mutex interfaces */
static const SyMutexMethods sDummyMutexMethods = {
	0, /* xGlobalInit() */
	0, /* xGlobalRelease() */
	DummyMutexNew,      /* xNew() */
	DummyMutexRelease,  /* xRelease() */
	DummyMutexEnter,    /* xEnter() */
	0,                  /* xTryEnter() */
	DummyMutexLeave     /* xLeave() */
};
PH7_PRIVATE const SyMutexMethods * SyMutexExportMethods(void)
{
	return &sDummyMutexMethods;
}
#endif /* __WINNT__ */
#endif /* PH7_ENABLE_THREADS */
static void * SyOSHeapAlloc(sxu32 nByte)
{
	void *pNew;
#if defined(__WINNT__)
	pNew = HeapAlloc(GetProcessHeap(),0,nByte);
#else
	pNew = malloc((size_t)nByte);
#endif
	return pNew;
}
static void * SyOSHeapRealloc(void *pOld,sxu32 nByte)
{
	void *pNew;
#if defined(__WINNT__)
	pNew = HeapReAlloc(GetProcessHeap(),0,pOld,nByte);
#else
	pNew = realloc(pOld,(size_t)nByte);
#endif
	return pNew;	
}
static void SyOSHeapFree(void *pPtr)
{
#if defined(__WINNT__)
	HeapFree(GetProcessHeap(),0,pPtr);
#else
	free(pPtr);
#endif
}
/* SyRunTimeApi:sxstr.c */
PH7_PRIVATE sxu32 SyStrlen(const char *zSrc)
{
	register const char *zIn = zSrc;
#if defined(UNTRUST)
	if( zIn == 0 ){
		return 0;
	}
#endif
	for(;;){
		if( !zIn[0] ){ break; } zIn++;
		if( !zIn[0] ){ break; } zIn++;
		if( !zIn[0] ){ break; } zIn++;
		if( !zIn[0] ){ break; } zIn++;	
	}
	return (sxu32)(zIn - zSrc);
}
PH7_PRIVATE sxi32 SyByteFind(const char *zStr,sxu32 nLen,sxi32 c,sxu32 *pPos)
{
	const char *zIn = zStr;
	const char *zEnd;
	
	zEnd = &zIn[nLen];
	for(;;){
		if( zIn >= zEnd ){ break; }if( zIn[0] == c ){ if( pPos ){ *pPos = (sxu32)(zIn - zStr); } return SXRET_OK; } zIn++;
		if( zIn >= zEnd ){ break; }if( zIn[0] == c ){ if( pPos ){ *pPos = (sxu32)(zIn - zStr); } return SXRET_OK; } zIn++;
		if( zIn >= zEnd ){ break; }if( zIn[0] == c ){ if( pPos ){ *pPos = (sxu32)(zIn - zStr); } return SXRET_OK; } zIn++;
		if( zIn >= zEnd ){ break; }if( zIn[0] == c ){ if( pPos ){ *pPos = (sxu32)(zIn - zStr); } return SXRET_OK; } zIn++;
	}
	return SXERR_NOTFOUND;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyByteFind2(const char *zStr,sxu32 nLen,sxi32 c,sxu32 *pPos)
{
	const char *zIn = zStr;
	const char *zEnd;
	
	zEnd = &zIn[nLen - 1];
	for( ;; ){
		if( zEnd < zIn ){ break; } if( zEnd[0] == c ){ if( pPos ){ *pPos =  (sxu32)(zEnd - zIn);} return SXRET_OK; } zEnd--;
		if( zEnd < zIn ){ break; } if( zEnd[0] == c ){ if( pPos ){ *pPos =  (sxu32)(zEnd - zIn);} return SXRET_OK; } zEnd--;
		if( zEnd < zIn ){ break; } if( zEnd[0] == c ){ if( pPos ){ *pPos =  (sxu32)(zEnd - zIn);} return SXRET_OK; } zEnd--;
		if( zEnd < zIn ){ break; } if( zEnd[0] == c ){ if( pPos ){ *pPos =  (sxu32)(zEnd - zIn);} return SXRET_OK; } zEnd--;
	}
	return SXERR_NOTFOUND; 
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE sxi32 SyByteListFind(const char *zSrc,sxu32 nLen,const char *zList,sxu32 *pFirstPos)
{
	const char *zIn = zSrc;
	const char *zPtr;
	const char *zEnd;
	sxi32 c;
	zEnd = &zSrc[nLen];
	for(;;){
		if( zIn >= zEnd ){ break; }	for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++ ){ if( zIn[0] == c ){ if( pFirstPos ){ *pFirstPos = (sxu32)(zIn - zSrc); } return SXRET_OK; } } zIn++;
		if( zIn >= zEnd ){ break; }	for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++ ){ if( zIn[0] == c ){ if( pFirstPos ){ *pFirstPos = (sxu32)(zIn - zSrc); } return SXRET_OK; } } zIn++;
		if( zIn >= zEnd ){ break; }	for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++ ){ if( zIn[0] == c ){ if( pFirstPos ){ *pFirstPos = (sxu32)(zIn - zSrc); } return SXRET_OK; } } zIn++;
		if( zIn >= zEnd ){ break; }	for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++ ){ if( zIn[0] == c ){ if( pFirstPos ){ *pFirstPos = (sxu32)(zIn - zSrc); } return SXRET_OK; } } zIn++;
	}	
	return SXERR_NOTFOUND; 
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyStrncmp(const char *zLeft,const char *zRight,sxu32 nLen)
{
	const unsigned char *zP = (const unsigned char *)zLeft;
	const unsigned char *zQ = (const unsigned char *)zRight;

	if( SX_EMPTY_STR(zP) || SX_EMPTY_STR(zQ)  ){
			return SX_EMPTY_STR(zP) ? (SX_EMPTY_STR(zQ) ? 0 : -1) :1;
	}
	if( nLen <= 0 ){
		return 0;
	}
	for(;;){
		if( nLen <= 0 ){ return 0; } if( zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0] ){ break; } zP++; zQ++; nLen--;
		if( nLen <= 0 ){ return 0; } if( zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0] ){ break; } zP++; zQ++; nLen--;
		if( nLen <= 0 ){ return 0; } if( zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0] ){ break; } zP++; zQ++; nLen--;
		if( nLen <= 0 ){ return 0; } if( zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0] ){ break; } zP++; zQ++; nLen--;
	}
	return (sxi32)(zP[0] - zQ[0]);
}	
#endif
PH7_PRIVATE sxi32 SyStrnicmp(const char *zLeft, const char *zRight,sxu32 SLen)
{
  	register unsigned char *p = (unsigned char *)zLeft;
	register unsigned char *q = (unsigned char *)zRight;
	
	if( SX_EMPTY_STR(p) || SX_EMPTY_STR(q) ){
		return SX_EMPTY_STR(p)? SX_EMPTY_STR(q) ? 0 : -1 :1;
	}
	for(;;){
		if( !SLen ){ return 0; }if( !*p || !*q || SyCharToLower(*p) != SyCharToLower(*q) ){ break; }p++;q++;--SLen;
		if( !SLen ){ return 0; }if( !*p || !*q || SyCharToLower(*p) != SyCharToLower(*q) ){ break; }p++;q++;--SLen;
		if( !SLen ){ return 0; }if( !*p || !*q || SyCharToLower(*p) != SyCharToLower(*q) ){ break; }p++;q++;--SLen;
		if( !SLen ){ return 0; }if( !*p || !*q || SyCharToLower(*p) != SyCharToLower(*q) ){ break; }p++;q++;--SLen;
		
	}
	return (sxi32)(SyCharToLower(p[0]) - SyCharToLower(q[0]));
}
PH7_PRIVATE sxi32 SyStrnmicmp(const void *pLeft, const void *pRight,sxu32 SLen)
{
	return SyStrnicmp((const char *)pLeft,(const char *)pRight,SLen);
}
static sxu32 Systrcpy(char *zDest,sxu32 nDestLen,const char *zSrc,sxu32 nLen)
{
	unsigned char *zBuf = (unsigned char *)zDest;
	unsigned char *zIn = (unsigned char *)zSrc;
	unsigned char *zEnd;
#if defined(UNTRUST)
	if( zSrc == (const char *)zDest ){
			return 0;
	}
#endif
	if( nLen <= 0 ){
		nLen = SyStrlen(zSrc);
	}
	zEnd = &zBuf[nDestLen - 1]; /* reserve a room for the null terminator */
	for(;;){
		if( zBuf >= zEnd || nLen == 0 ){ break;} zBuf[0] = zIn[0]; zIn++; zBuf++; nLen--;
		if( zBuf >= zEnd || nLen == 0 ){ break;} zBuf[0] = zIn[0]; zIn++; zBuf++; nLen--;
		if( zBuf >= zEnd || nLen == 0 ){ break;} zBuf[0] = zIn[0]; zIn++; zBuf++; nLen--;
		if( zBuf >= zEnd || nLen == 0 ){ break;} zBuf[0] = zIn[0]; zIn++; zBuf++; nLen--;
	}
	zBuf[0] = 0;
	return (sxu32)(zBuf-(unsigned char *)zDest);
}
/* SyRunTimeApi:sxmem.c */
PH7_PRIVATE void SyZero(void *pSrc,sxu32 nSize)
{
	register unsigned char *zSrc = (unsigned char *)pSrc;
	unsigned char *zEnd;
#if defined(UNTRUST)
	if( zSrc == 0 || nSize <= 0 ){
		return ;
	}
#endif
	zEnd = &zSrc[nSize];
	for(;;){
		if( zSrc >= zEnd ){break;} zSrc[0] = 0; zSrc++;
		if( zSrc >= zEnd ){break;} zSrc[0] = 0; zSrc++;
		if( zSrc >= zEnd ){break;} zSrc[0] = 0; zSrc++;
		if( zSrc >= zEnd ){break;} zSrc[0] = 0; zSrc++;
	}
}
PH7_PRIVATE sxi32 SyMemcmp(const void *pB1,const void *pB2,sxu32 nSize)
{
	sxi32 rc;
	if( nSize <= 0 ){
		return 0;
	}
	if( pB1 == 0 || pB2 == 0 ){
		return pB1 != 0 ? 1 : (pB2 == 0 ? 0 : -1);
	}
	SX_MACRO_FAST_CMP(pB1,pB2,nSize,rc);
	return rc;
}
PH7_PRIVATE sxu32 SyMemcpy(const void *pSrc,void *pDest,sxu32 nLen)
{
#if defined(UNTRUST)
	if( pSrc == 0 || pDest == 0 ){
		return 0;
	}
#endif
	if( pSrc == (const void *)pDest ){
		return nLen;
	}
	SX_MACRO_FAST_MEMCPY(pSrc,pDest,nLen);
	return nLen;
}
static void * MemOSAlloc(sxu32 nBytes)
{
	sxu32 *pChunk;
	pChunk = (sxu32 *)SyOSHeapAlloc(nBytes + sizeof(sxu32));
	if( pChunk == 0 ){
		return 0;
	}
	pChunk[0] = nBytes;
	return (void *)&pChunk[1];
}
static void * MemOSRealloc(void *pOld,sxu32 nBytes)
{
	sxu32 *pOldChunk;
	sxu32 *pChunk;
	pOldChunk = (sxu32 *)(((char *)pOld)-sizeof(sxu32));
	if( pOldChunk[0] >= nBytes ){
		return pOld;
	}
	pChunk = (sxu32 *)SyOSHeapRealloc(pOldChunk,nBytes + sizeof(sxu32));
	if( pChunk == 0 ){
		return 0;
	}
	pChunk[0] = nBytes;
	return (void *)&pChunk[1];
}
static void MemOSFree(void *pBlock)
{
	void *pChunk;
	pChunk = (void *)(((char *)pBlock)-sizeof(sxu32));
	SyOSHeapFree(pChunk);
}
static sxu32 MemOSChunkSize(void *pBlock)
{
	sxu32 *pChunk;
	pChunk = (sxu32 *)(((char *)pBlock)-sizeof(sxu32));
	return pChunk[0];
}
/* Export OS allocation methods */
static const SyMemMethods sOSAllocMethods = {
	MemOSAlloc,
	MemOSRealloc,
	MemOSFree,
	MemOSChunkSize,
	0,
	0,
	0
};
static void * MemBackendAlloc(SyMemBackend *pBackend,sxu32 nByte)
{
	SyMemBlock *pBlock;
	sxi32 nRetry = 0;

	/* Append an extra block so we can tracks allocated chunks and avoid memory
	 * leaks.
	 */
	nByte += sizeof(SyMemBlock);
	for(;;){
		pBlock = (SyMemBlock *)pBackend->pMethods->xAlloc(nByte);
		if( pBlock != 0 || pBackend->xMemError == 0 || nRetry > SXMEM_BACKEND_RETRY 
			|| SXERR_RETRY != pBackend->xMemError(pBackend->pUserData) ){
				break;
		}
		nRetry++;
	}
	if( pBlock  == 0 ){
		return 0;
	}
	pBlock->pNext = pBlock->pPrev = 0;
	/* Link to the list of already tracked blocks */
	MACRO_LD_PUSH(pBackend->pBlocks,pBlock);
#if defined(UNTRUST)
	pBlock->nGuard = SXMEM_BACKEND_MAGIC;
#endif
	pBackend->nBlock++;
	return (void *)&pBlock[1];
}
PH7_PRIVATE void * SyMemBackendAlloc(SyMemBackend *pBackend,sxu32 nByte)
{
	void *pChunk;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) ){
		return 0;
	}
#endif
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	pChunk = MemBackendAlloc(&(*pBackend),nByte);
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return pChunk;
}
static void * MemBackendRealloc(SyMemBackend *pBackend,void * pOld,sxu32 nByte)
{
	SyMemBlock *pBlock,*pNew,*pPrev,*pNext;
	sxu32 nRetry = 0;

	if( pOld == 0 ){
		return MemBackendAlloc(&(*pBackend),nByte);
	}
	pBlock = (SyMemBlock *)(((char *)pOld) - sizeof(SyMemBlock));
#if defined(UNTRUST)
	if( pBlock->nGuard != SXMEM_BACKEND_MAGIC ){
		return 0;
	}
#endif
	nByte += sizeof(SyMemBlock);
	pPrev = pBlock->pPrev;
	pNext = pBlock->pNext;
	for(;;){
		pNew = (SyMemBlock *)pBackend->pMethods->xRealloc(pBlock,nByte);
		if( pNew != 0 || pBackend->xMemError == 0 || nRetry > SXMEM_BACKEND_RETRY ||
			SXERR_RETRY != pBackend->xMemError(pBackend->pUserData) ){
				break;
		}
		nRetry++;
	}
	if( pNew == 0 ){
		return 0;
	}
	if( pNew != pBlock ){
		if( pPrev == 0 ){
			pBackend->pBlocks = pNew;
		}else{
			pPrev->pNext = pNew;
		}
		if( pNext ){
			pNext->pPrev = pNew;
		}
#if defined(UNTRUST)
		pNew->nGuard = SXMEM_BACKEND_MAGIC;
#endif
	}
	return (void *)&pNew[1];
}
PH7_PRIVATE void * SyMemBackendRealloc(SyMemBackend *pBackend,void * pOld,sxu32 nByte)
{
	void *pChunk;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend)  ){
		return 0;
	}
#endif
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	pChunk = MemBackendRealloc(&(*pBackend),pOld,nByte);
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return pChunk;
}
static sxi32 MemBackendFree(SyMemBackend *pBackend,void * pChunk)
{
	SyMemBlock *pBlock;
	pBlock = (SyMemBlock *)(((char *)pChunk) - sizeof(SyMemBlock));
#if defined(UNTRUST)
	if( pBlock->nGuard != SXMEM_BACKEND_MAGIC ){
		return SXERR_CORRUPT;
	}
#endif
	/* Unlink from the list of active blocks */
	if( pBackend->nBlock > 0 ){
		/* Release the block */
#if defined(UNTRUST)
		/* Mark as stale block */
		pBlock->nGuard = 0x635B;
#endif
		MACRO_LD_REMOVE(pBackend->pBlocks,pBlock);
		pBackend->nBlock--;
		pBackend->pMethods->xFree(pBlock);
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMemBackendFree(SyMemBackend *pBackend,void * pChunk)
{
	sxi32 rc;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) ){
		return SXERR_CORRUPT;
	}
#endif
	if( pChunk == 0 ){
		return SXRET_OK;
	}
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	rc = MemBackendFree(&(*pBackend),pChunk);
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return rc;
}
#if defined(PH7_ENABLE_THREADS)
PH7_PRIVATE sxi32 SyMemBackendMakeThreadSafe(SyMemBackend *pBackend,const SyMutexMethods *pMethods)
{
	SyMutex *pMutex;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) || pMethods == 0 || pMethods->xNew == 0){
		return SXERR_CORRUPT;
	}
#endif
	pMutex = pMethods->xNew(SXMUTEX_TYPE_FAST);
	if( pMutex == 0 ){
		return SXERR_OS;
	}
	/* Attach the mutex to the memory backend */
	pBackend->pMutex = pMutex;
	pBackend->pMutexMethods = pMethods;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMemBackendDisbaleMutexing(SyMemBackend *pBackend)
{
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) ){
		return SXERR_CORRUPT;
	}
#endif
	if( pBackend->pMutex == 0 ){
		/* There is no mutex subsystem at all */
		return SXRET_OK;
	}
	SyMutexRelease(pBackend->pMutexMethods,pBackend->pMutex);
	pBackend->pMutexMethods = 0;
	pBackend->pMutex = 0; 
	return SXRET_OK;
}
#endif
/*
 * Memory pool allocator
 */
#define SXMEM_POOL_MAGIC		0xDEAD
#define SXMEM_POOL_MAXALLOC		(1<<(SXMEM_POOL_NBUCKETS+SXMEM_POOL_INCR)) 
#define SXMEM_POOL_MINALLOC		(1<<(SXMEM_POOL_INCR))
static sxi32 MemPoolBucketAlloc(SyMemBackend *pBackend,sxu32 nBucket)
{
	char *zBucket,*zBucketEnd;
	SyMemHeader *pHeader;
	sxu32 nBucketSize;
	
	/* Allocate one big block first */
	zBucket = (char *)MemBackendAlloc(&(*pBackend),SXMEM_POOL_MAXALLOC);
	if( zBucket == 0 ){
		return SXERR_MEM;
	}
	zBucketEnd = &zBucket[SXMEM_POOL_MAXALLOC];
	/* Divide the big block into mini bucket pool */
	nBucketSize = 1 << (nBucket + SXMEM_POOL_INCR);
	pBackend->apPool[nBucket] = pHeader = (SyMemHeader *)zBucket;
	for(;;){
		if( &zBucket[nBucketSize] >= zBucketEnd ){
			break;
		}
		pHeader->pNext = (SyMemHeader *)&zBucket[nBucketSize];
		/* Advance the cursor to the next available chunk */
		pHeader = pHeader->pNext;
		zBucket += nBucketSize;	
	}
	pHeader->pNext = 0;
	
	return SXRET_OK;
}
static void * MemBackendPoolAlloc(SyMemBackend *pBackend,sxu32 nByte)
{
	SyMemHeader *pBucket,*pNext;
	sxu32 nBucketSize;
	sxu32 nBucket;

	if( nByte + sizeof(SyMemHeader) >= SXMEM_POOL_MAXALLOC ){
		/* Allocate a big chunk directly */
		pBucket = (SyMemHeader *)MemBackendAlloc(&(*pBackend),nByte+sizeof(SyMemHeader));
		if( pBucket == 0 ){
			return 0;
		}
		/* Record as big block */
		pBucket->nBucket = (sxu32)(SXMEM_POOL_MAGIC << 16) | SXU16_HIGH;
		return (void *)(pBucket+1);
	}
	/* Locate the appropriate bucket */
	nBucket = 0;
	nBucketSize = SXMEM_POOL_MINALLOC;
	while( nByte + sizeof(SyMemHeader) > nBucketSize  ){
		nBucketSize <<= 1;
		nBucket++;
	}
	pBucket = pBackend->apPool[nBucket];
	if( pBucket == 0 ){
		sxi32 rc;
		rc = MemPoolBucketAlloc(&(*pBackend),nBucket);
		if( rc != SXRET_OK ){
			return 0;
		}
		pBucket = pBackend->apPool[nBucket];
	}
	/* Remove from the free list */
	pNext = pBucket->pNext;
	pBackend->apPool[nBucket] = pNext;
	/* Record bucket&magic number */
	pBucket->nBucket = (SXMEM_POOL_MAGIC << 16) | nBucket;
	return (void *)&pBucket[1];
}
PH7_PRIVATE void * SyMemBackendPoolAlloc(SyMemBackend *pBackend,sxu32 nByte)
{
	void *pChunk;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) ){
		return 0;
	}
#endif
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	pChunk = MemBackendPoolAlloc(&(*pBackend),nByte);
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return pChunk;
}
static sxi32 MemBackendPoolFree(SyMemBackend *pBackend,void * pChunk)
{
	SyMemHeader *pHeader;
	sxu32 nBucket;
	/* Get the corresponding bucket */
	pHeader = (SyMemHeader *)(((char *)pChunk) - sizeof(SyMemHeader));
	/* Sanity check to avoid misuse */
	if( (pHeader->nBucket >> 16) != SXMEM_POOL_MAGIC ){
		return SXERR_CORRUPT;
	}
	nBucket = pHeader->nBucket & 0xFFFF;
	if( nBucket == SXU16_HIGH ){
		/* Free the big block */
		MemBackendFree(&(*pBackend),pHeader);
	}else{
		/* Return to the free list */
		pHeader->pNext = pBackend->apPool[nBucket & 0x0f];
		pBackend->apPool[nBucket & 0x0f] = pHeader;
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMemBackendPoolFree(SyMemBackend *pBackend,void * pChunk)
{
	sxi32 rc;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) || pChunk == 0 ){
		return SXERR_CORRUPT;
	}
#endif
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	rc = MemBackendPoolFree(&(*pBackend),pChunk);
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return rc;
}
#if 0
static void * MemBackendPoolRealloc(SyMemBackend *pBackend,void * pOld,sxu32 nByte)
{
	sxu32 nBucket,nBucketSize;
	SyMemHeader *pHeader;
	void * pNew;

	if( pOld == 0 ){
		/* Allocate a new pool */
		pNew = MemBackendPoolAlloc(&(*pBackend),nByte);
		return pNew;
	}
	/* Get the corresponding bucket */
	pHeader = (SyMemHeader *)(((char *)pOld) - sizeof(SyMemHeader));
	/* Sanity check to avoid misuse */
	if( (pHeader->nBucket >> 16) != SXMEM_POOL_MAGIC ){
		return 0;
	}
	nBucket = pHeader->nBucket & 0xFFFF;
	if( nBucket == SXU16_HIGH ){
		/* Big block */
		return MemBackendRealloc(&(*pBackend),pHeader,nByte);
	}
	nBucketSize = 1 << (nBucket + SXMEM_POOL_INCR);
	if( nBucketSize >= nByte + sizeof(SyMemHeader) ){
		/* The old bucket can honor the requested size */
		return pOld;
	}
	/* Allocate a new pool */
	pNew = MemBackendPoolAlloc(&(*pBackend),nByte);
	if( pNew == 0 ){
		return 0;
	}
	/* Copy the old data into the new block */
	SyMemcpy(pOld,pNew,nBucketSize);
	/* Free the stale block */
	MemBackendPoolFree(&(*pBackend),pOld);
	return pNew;
}
PH7_PRIVATE void * SyMemBackendPoolRealloc(SyMemBackend *pBackend,void * pOld,sxu32 nByte)
{
	void *pChunk;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) ){
		return 0;
	}
#endif
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	pChunk = MemBackendPoolRealloc(&(*pBackend),pOld,nByte);
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return pChunk;
}
#endif
PH7_PRIVATE sxi32 SyMemBackendInit(SyMemBackend *pBackend,ProcMemError xMemErr,void * pUserData)
{
#if defined(UNTRUST)
	if( pBackend == 0 ){
		return SXERR_EMPTY;
	}
#endif
	/* Zero the allocator first */
	SyZero(&(*pBackend),sizeof(SyMemBackend));
	pBackend->xMemError = xMemErr;
	pBackend->pUserData = pUserData;
	/* Switch to the OS memory allocator */
	pBackend->pMethods = &sOSAllocMethods;
	if( pBackend->pMethods->xInit ){
		/* Initialize the backend  */
		if( SXRET_OK != pBackend->pMethods->xInit(pBackend->pMethods->pUserData) ){
			return SXERR_ABORT;
		}
	}
#if defined(UNTRUST)
	pBackend->nMagic = SXMEM_BACKEND_MAGIC;
#endif
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMemBackendInitFromOthers(SyMemBackend *pBackend,const SyMemMethods *pMethods,ProcMemError xMemErr,void * pUserData)
{
#if defined(UNTRUST)
	if( pBackend == 0 || pMethods == 0){
		return SXERR_EMPTY;
	}
#endif
	if( pMethods->xAlloc == 0 || pMethods->xRealloc == 0 || pMethods->xFree == 0 || pMethods->xChunkSize == 0 ){
		/* mandatory methods are missing */
		return SXERR_INVALID;
	}
	/* Zero the allocator first */
	SyZero(&(*pBackend),sizeof(SyMemBackend));
	pBackend->xMemError = xMemErr;
	pBackend->pUserData = pUserData;
	/* Switch to the host application memory allocator */
	pBackend->pMethods = pMethods;
	if( pBackend->pMethods->xInit ){
		/* Initialize the backend  */
		if( SXRET_OK != pBackend->pMethods->xInit(pBackend->pMethods->pUserData) ){
			return SXERR_ABORT;
		}
	}
#if defined(UNTRUST)
	pBackend->nMagic = SXMEM_BACKEND_MAGIC;
#endif
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMemBackendInitFromParent(SyMemBackend *pBackend,SyMemBackend *pParent)
{
	sxu8 bInheritMutex;
#if defined(UNTRUST)
	if( pBackend == 0 || SXMEM_BACKEND_CORRUPT(pParent) ){
		return SXERR_CORRUPT;
	}
#endif
	/* Zero the allocator first */
	SyZero(&(*pBackend),sizeof(SyMemBackend));
	pBackend->pMethods  = pParent->pMethods;
	pBackend->xMemError = pParent->xMemError;
	pBackend->pUserData = pParent->pUserData;
	bInheritMutex = pParent->pMutexMethods ? TRUE : FALSE;
	if( bInheritMutex ){
		pBackend->pMutexMethods = pParent->pMutexMethods;
		/* Create a private mutex */
		pBackend->pMutex = pBackend->pMutexMethods->xNew(SXMUTEX_TYPE_FAST);
		if( pBackend->pMutex ==  0){
			return SXERR_OS;
		}
	}
#if defined(UNTRUST)
	pBackend->nMagic = SXMEM_BACKEND_MAGIC;
#endif
	return SXRET_OK;
}
static sxi32 MemBackendRelease(SyMemBackend *pBackend)
{
	SyMemBlock *pBlock,*pNext;

	pBlock = pBackend->pBlocks;
	for(;;){
		if( pBackend->nBlock == 0 ){
			break;
		}
		pNext  = pBlock->pNext;
		pBackend->pMethods->xFree(pBlock);
		pBlock = pNext;
		pBackend->nBlock--;
		/* LOOP ONE */
		if( pBackend->nBlock == 0 ){
			break;
		}
		pNext  = pBlock->pNext;
		pBackend->pMethods->xFree(pBlock);
		pBlock = pNext;
		pBackend->nBlock--;
		/* LOOP TWO */
		if( pBackend->nBlock == 0 ){
			break;
		}
		pNext  = pBlock->pNext;
		pBackend->pMethods->xFree(pBlock);
		pBlock = pNext;
		pBackend->nBlock--;
		/* LOOP THREE */
		if( pBackend->nBlock == 0 ){
			break;
		}
		pNext  = pBlock->pNext;
		pBackend->pMethods->xFree(pBlock);
		pBlock = pNext;
		pBackend->nBlock--;
		/* LOOP FOUR */
	}
	if( pBackend->pMethods->xRelease ){
		pBackend->pMethods->xRelease(pBackend->pMethods->pUserData);
	}
	pBackend->pMethods = 0;
	pBackend->pBlocks  = 0;
#if defined(UNTRUST)
	pBackend->nMagic = 0x2626;
#endif
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMemBackendRelease(SyMemBackend *pBackend)
{
	sxi32 rc;
#if defined(UNTRUST)
	if( SXMEM_BACKEND_CORRUPT(pBackend) ){
		return SXERR_INVALID;
	}
#endif
	if( pBackend->pMutexMethods ){
		SyMutexEnter(pBackend->pMutexMethods,pBackend->pMutex);
	}
	rc = MemBackendRelease(&(*pBackend));
	if( pBackend->pMutexMethods ){
		SyMutexLeave(pBackend->pMutexMethods,pBackend->pMutex);
		SyMutexRelease(pBackend->pMutexMethods,pBackend->pMutex);
	}
	return SXRET_OK;
}
PH7_PRIVATE void * SyMemBackendDup(SyMemBackend *pBackend,const void *pSrc,sxu32 nSize)
{
	void *pNew;
#if defined(UNTRUST)
	if( pSrc == 0 || nSize <= 0 ){
		return 0;
	}
#endif
	pNew = SyMemBackendAlloc(&(*pBackend),nSize);
	if( pNew ){
		SyMemcpy(pSrc,pNew,nSize);
	}
	return pNew;
}
PH7_PRIVATE char * SyMemBackendStrDup(SyMemBackend *pBackend,const char *zSrc,sxu32 nSize)
{
	char *zDest;
	zDest = (char *)SyMemBackendAlloc(&(*pBackend),nSize + 1);
	if( zDest ){
		Systrcpy(zDest,nSize+1,zSrc,nSize);
	}
	return zDest;
}
PH7_PRIVATE sxi32 SyBlobInitFromBuf(SyBlob *pBlob,void *pBuffer,sxu32 nSize)
{
#if defined(UNTRUST)
	if( pBlob == 0 || pBuffer == 0 || nSize < 1 ){
		return SXERR_EMPTY;
	}
#endif
	pBlob->pBlob = pBuffer;
	pBlob->mByte = nSize;
	pBlob->nByte = 0;
	pBlob->pAllocator = 0;
	pBlob->nFlags = SXBLOB_LOCKED|SXBLOB_STATIC;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyBlobInit(SyBlob *pBlob,SyMemBackend *pAllocator)
{
#if defined(UNTRUST)
	if( pBlob == 0  ){
		return SXERR_EMPTY;
	}
#endif
	pBlob->pBlob = 0;
	pBlob->mByte = pBlob->nByte	= 0;
	pBlob->pAllocator = &(*pAllocator);
	pBlob->nFlags = 0;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyBlobReadOnly(SyBlob *pBlob,const void *pData,sxu32 nByte)
{
#if defined(UNTRUST)
	if( pBlob == 0  ){
		return SXERR_EMPTY;
	}
#endif
	pBlob->pBlob = (void *)pData;
	pBlob->nByte = nByte;
	pBlob->mByte = 0;
	pBlob->nFlags |= SXBLOB_RDONLY;
	return SXRET_OK;
}
#ifndef SXBLOB_MIN_GROWTH
#define SXBLOB_MIN_GROWTH 16
#endif
static sxi32 BlobPrepareGrow(SyBlob *pBlob,sxu32 *pByte)
{
	sxu32 nByte;
	void *pNew;
	nByte = *pByte;
	if( pBlob->nFlags & (SXBLOB_LOCKED|SXBLOB_STATIC) ){
		if ( SyBlobFreeSpace(pBlob) < nByte ){
			*pByte = SyBlobFreeSpace(pBlob);
			if( (*pByte) == 0 ){
				return SXERR_SHORT;
			}
		}
		return SXRET_OK;
	}
	if( pBlob->nFlags & SXBLOB_RDONLY ){
		/* Make a copy of the read-only item */
		if( pBlob->nByte > 0 ){
			pNew = SyMemBackendDup(pBlob->pAllocator,pBlob->pBlob,pBlob->nByte);
			if( pNew == 0 ){
				return SXERR_MEM;
			}
			pBlob->pBlob = pNew;
			pBlob->mByte = pBlob->nByte;
		}else{
			pBlob->pBlob = 0;
			pBlob->mByte = 0;
		}
		/* Remove the read-only flag */
		pBlob->nFlags &= ~SXBLOB_RDONLY;
	}
	if( SyBlobFreeSpace(pBlob) >= nByte ){
		return SXRET_OK;
	}
	if( pBlob->mByte > 0 ){
		nByte = nByte + pBlob->mByte * 2 + SXBLOB_MIN_GROWTH;
	}else if ( nByte < SXBLOB_MIN_GROWTH ){
		nByte = SXBLOB_MIN_GROWTH;
	}
	pNew = SyMemBackendRealloc(pBlob->pAllocator,pBlob->pBlob,nByte);
	if( pNew == 0 ){
		return SXERR_MEM;
	}
	pBlob->pBlob = pNew;
	pBlob->mByte = nByte;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyBlobAppend(SyBlob *pBlob,const void *pData,sxu32 nSize)
{
	sxu8 *zBlob;
	sxi32 rc;
	if( nSize < 1 ){
		return SXRET_OK;
	}
	rc = BlobPrepareGrow(&(*pBlob),&nSize);
	if( SXRET_OK != rc ){
		return rc;
	}
	if( pData ){
		zBlob = (sxu8 *)pBlob->pBlob ;
		zBlob = &zBlob[pBlob->nByte];
		pBlob->nByte += nSize;
		SX_MACRO_FAST_MEMCPY(pData,zBlob,nSize);
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyBlobNullAppend(SyBlob *pBlob)
{
	sxi32 rc;
	sxu32 n;
	n = pBlob->nByte;
	rc = SyBlobAppend(&(*pBlob),(const void *)"\0",sizeof(char));
	if (rc == SXRET_OK ){
		pBlob->nByte = n;
	}
	return rc;
}
PH7_PRIVATE sxi32 SyBlobDup(SyBlob *pSrc,SyBlob *pDest)
{
	sxi32 rc = SXRET_OK;
#ifdef UNTRUST
	if( pSrc == 0 || pDest == 0 ){
		return SXERR_EMPTY;
	}
#endif
	if( pSrc->nByte > 0 ){
		rc = SyBlobAppend(&(*pDest),pSrc->pBlob,pSrc->nByte);
	}
	return rc;
}
PH7_PRIVATE sxi32 SyBlobCmp(SyBlob *pLeft,SyBlob *pRight)
{
	sxi32 rc;
#ifdef UNTRUST
	if( pLeft == 0 || pRight == 0 ){
		return pLeft ? 1 : -1;
	}
#endif
	if( pLeft->nByte != pRight->nByte ){
		/* Length differ */
		return pLeft->nByte - pRight->nByte;
	}
	if( pLeft->nByte == 0 ){
		return 0;
	}
	/* Perform a standard memcmp() operation */
	rc = SyMemcmp(pLeft->pBlob,pRight->pBlob,pLeft->nByte);
	return rc;
}
PH7_PRIVATE sxi32 SyBlobReset(SyBlob *pBlob)
{
	pBlob->nByte = 0;
	if( pBlob->nFlags & SXBLOB_RDONLY ){
		pBlob->pBlob = 0;
		pBlob->mByte = 0;
		pBlob->nFlags &= ~SXBLOB_RDONLY;
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyBlobRelease(SyBlob *pBlob)
{
	if( (pBlob->nFlags & (SXBLOB_STATIC|SXBLOB_RDONLY)) == 0 && pBlob->mByte > 0 ){
		SyMemBackendFree(pBlob->pAllocator,pBlob->pBlob);
	}
	pBlob->pBlob = 0;
	pBlob->nByte = pBlob->mByte = 0;
	pBlob->nFlags = 0;
	return SXRET_OK;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyBlobSearch(const void *pBlob,sxu32 nLen,const void *pPattern,sxu32 pLen,sxu32 *pOfft)
{
	const char *zIn = (const char *)pBlob;
	const char *zEnd;
	sxi32 rc;
	if( pLen > nLen ){
		return SXERR_NOTFOUND;
	}
	zEnd = &zIn[nLen-pLen];
	for(;;){
		if( zIn > zEnd ){break;} SX_MACRO_FAST_CMP(zIn,pPattern,pLen,rc); if( rc == 0 ){ if( pOfft ){ *pOfft = (sxu32)(zIn - (const char *)pBlob);} return SXRET_OK; } zIn++;
		if( zIn > zEnd ){break;} SX_MACRO_FAST_CMP(zIn,pPattern,pLen,rc); if( rc == 0 ){ if( pOfft ){ *pOfft = (sxu32)(zIn - (const char *)pBlob);} return SXRET_OK; } zIn++;
		if( zIn > zEnd ){break;} SX_MACRO_FAST_CMP(zIn,pPattern,pLen,rc); if( rc == 0 ){ if( pOfft ){ *pOfft = (sxu32)(zIn - (const char *)pBlob);} return SXRET_OK; } zIn++;
		if( zIn > zEnd ){break;} SX_MACRO_FAST_CMP(zIn,pPattern,pLen,rc); if( rc == 0 ){ if( pOfft ){ *pOfft = (sxu32)(zIn - (const char *)pBlob);} return SXRET_OK; } zIn++;
	}
	return SXERR_NOTFOUND;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/* SyRunTimeApi:sxds.c */
PH7_PRIVATE sxi32 SySetInit(SySet *pSet,SyMemBackend *pAllocator,sxu32 ElemSize)
{
	pSet->nSize = 0 ;
	pSet->nUsed = 0;
	pSet->nCursor = 0;
	pSet->eSize = ElemSize;
	pSet->pAllocator = pAllocator;
	pSet->pBase =  0;
	pSet->pUserData = 0;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SySetPut(SySet *pSet,const void *pItem)
{
	unsigned char *zbase;
	if( pSet->nUsed >= pSet->nSize ){
		void *pNew;
		if( pSet->pAllocator == 0 ){
			return  SXERR_LOCKED;
		}
		if( pSet->nSize <= 0 ){
			pSet->nSize = 4;
		}
		pNew = SyMemBackendRealloc(pSet->pAllocator,pSet->pBase,pSet->eSize * pSet->nSize * 2);
		if( pNew == 0 ){
			return SXERR_MEM;
		}
		pSet->pBase = pNew;
		pSet->nSize <<= 1;
	}
	zbase = (unsigned char *)pSet->pBase;
	SX_MACRO_FAST_MEMCPY(pItem,&zbase[pSet->nUsed * pSet->eSize],pSet->eSize);
	pSet->nUsed++;	
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SySetAlloc(SySet *pSet,sxi32 nItem)
{
	if( pSet->nSize > 0 ){
		return SXERR_LOCKED;
	}
	if( nItem < 8 ){
		nItem = 8;
	}
	pSet->pBase = SyMemBackendAlloc(pSet->pAllocator,pSet->eSize * nItem);
	if( pSet->pBase == 0 ){
		return SXERR_MEM;
	}
	pSet->nSize = nItem;
	return SXRET_OK;
} 
PH7_PRIVATE sxi32 SySetReset(SySet *pSet)
{
	pSet->nUsed   = 0;
	pSet->nCursor = 0;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SySetResetCursor(SySet *pSet)
{
	pSet->nCursor = 0;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SySetGetNextEntry(SySet *pSet,void **ppEntry)
{
	register unsigned char *zSrc;
	if( pSet->nCursor >= pSet->nUsed ){
		/* Reset cursor */
		pSet->nCursor = 0;
		return SXERR_EOF;
	}
	zSrc = (unsigned char *)SySetBasePtr(pSet);
	if( ppEntry ){
		*ppEntry = (void *)&zSrc[pSet->nCursor * pSet->eSize];
	}
	pSet->nCursor++;
	return SXRET_OK;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE void * SySetPeekCurrentEntry(SySet *pSet)
{
	register unsigned char *zSrc;
	if( pSet->nCursor >= pSet->nUsed ){
		return 0;
	}
	zSrc = (unsigned char *)SySetBasePtr(pSet);
	return (void *)&zSrc[pSet->nCursor * pSet->eSize];
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
PH7_PRIVATE sxi32 SySetTruncate(SySet *pSet,sxu32 nNewSize)
{
	if( nNewSize < pSet->nUsed ){
		pSet->nUsed = nNewSize;
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SySetRelease(SySet *pSet)
{
	sxi32 rc = SXRET_OK;
	if( pSet->pAllocator && pSet->pBase ){
		rc = SyMemBackendFree(pSet->pAllocator,pSet->pBase);
	}
	pSet->pBase = 0;
	pSet->nUsed = 0;
	pSet->nCursor = 0;
	return rc;
}
PH7_PRIVATE void * SySetPeek(SySet *pSet)
{
	const char *zBase;
	if( pSet->nUsed <= 0 ){
		return 0;
	}
	zBase = (const char *)pSet->pBase;
	return (void *)&zBase[(pSet->nUsed - 1) * pSet->eSize]; 
}
PH7_PRIVATE void * SySetPop(SySet *pSet)
{
	const char *zBase;
	void *pData;
	if( pSet->nUsed <= 0 ){
		return 0;
	}
	zBase = (const char *)pSet->pBase;
	pSet->nUsed--;
	pData =  (void *)&zBase[pSet->nUsed * pSet->eSize]; 
	return pData;
}
PH7_PRIVATE void * SySetAt(SySet *pSet,sxu32 nIdx)
{
	const char *zBase;
	if( nIdx >= pSet->nUsed ){
		/* Out of range */
		return 0;
	}
	zBase = (const char *)pSet->pBase;
	return (void *)&zBase[nIdx * pSet->eSize]; 
}
/* Private hash entry */
struct SyHashEntry_Pr
{
	const void *pKey; /* Hash key */
	sxu32 nKeyLen;    /* Key length */
	void *pUserData;  /* User private data */
	/* Private fields */
	sxu32 nHash;
	SyHash *pHash;
	SyHashEntry_Pr *pNext,*pPrev; /* Next and previous entry in the list */
	SyHashEntry_Pr *pNextCollide,*pPrevCollide; /* Collision list */
};
#define INVALID_HASH(H) ((H)->apBucket == 0)
/* Forward declarartion */
static sxu32 SyBinHash(const void *pSrc,sxu32 nLen);
PH7_PRIVATE sxi32 SyHashInit(SyHash *pHash,SyMemBackend *pAllocator,ProcHash xHash,ProcCmp xCmp)
{
	SyHashEntry_Pr **apNew;
#if defined(UNTRUST)
	if( pHash == 0 ){
		return SXERR_EMPTY;
	}
#endif
	/* Allocate a new table */
	apNew = (SyHashEntry_Pr **)SyMemBackendAlloc(&(*pAllocator),sizeof(SyHashEntry_Pr *) * SXHASH_BUCKET_SIZE);
	if( apNew == 0 ){
		return SXERR_MEM;
	}
	SyZero((void *)apNew,sizeof(SyHashEntry_Pr *) * SXHASH_BUCKET_SIZE);
	pHash->pAllocator = &(*pAllocator);
	pHash->xHash = xHash ? xHash : SyBinHash;
	pHash->xCmp = xCmp ? xCmp : SyMemcmp;
	pHash->pCurrent = pHash->pList = 0;
	pHash->nEntry = 0;
	pHash->apBucket = apNew;
	pHash->nBucketSize = SXHASH_BUCKET_SIZE;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyHashRelease(SyHash *pHash)
{
	SyHashEntry_Pr *pEntry,*pNext;
#if defined(UNTRUST)
	if( INVALID_HASH(pHash)  ){
		return SXERR_EMPTY;
	}
#endif
	pEntry = pHash->pList;
	for(;;){
		if( pHash->nEntry == 0 ){
			break;
		}
		pNext = pEntry->pNext;
		SyMemBackendPoolFree(pHash->pAllocator,pEntry);
		pEntry = pNext;
		pHash->nEntry--;
	}
	if( pHash->apBucket ){
		SyMemBackendFree(pHash->pAllocator,(void *)pHash->apBucket);
	}
	pHash->apBucket = 0;
	pHash->nBucketSize = 0;
	pHash->pAllocator = 0;
	return SXRET_OK;
}
static SyHashEntry_Pr * HashGetEntry(SyHash *pHash,const void *pKey,sxu32 nKeyLen)
{
	SyHashEntry_Pr *pEntry;
	sxu32 nHash;

	nHash = pHash->xHash(pKey,nKeyLen);
	pEntry = pHash->apBucket[nHash & (pHash->nBucketSize - 1)];
	for(;;){
		if( pEntry == 0 ){
			break;
		}
		if( pEntry->nHash == nHash && pEntry->nKeyLen == nKeyLen && 
			pHash->xCmp(pEntry->pKey,pKey,nKeyLen) == 0 ){
				return pEntry;
		}
		pEntry = pEntry->pNextCollide;
	}
	/* Entry not found */
	return 0;
}
PH7_PRIVATE SyHashEntry * SyHashGet(SyHash *pHash,const void *pKey,sxu32 nKeyLen)
{
	SyHashEntry_Pr *pEntry;
#if defined(UNTRUST)
	if( INVALID_HASH(pHash) ){
		return 0;
	}
#endif
	if( pHash->nEntry < 1 || nKeyLen < 1 ){
		/* Don't bother hashing,return immediately */
		return 0;
	}
	pEntry = HashGetEntry(&(*pHash),pKey,nKeyLen);
	if( pEntry == 0 ){
		return 0;
	}
	return (SyHashEntry *)pEntry;
}
static sxi32 HashDeleteEntry(SyHash *pHash,SyHashEntry_Pr *pEntry,void **ppUserData)
{
	sxi32 rc;
	if( pEntry->pPrevCollide == 0 ){
		pHash->apBucket[pEntry->nHash & (pHash->nBucketSize - 1)] = pEntry->pNextCollide;
	}else{
		pEntry->pPrevCollide->pNextCollide = pEntry->pNextCollide;
	}
	if( pEntry->pNextCollide ){
		pEntry->pNextCollide->pPrevCollide = pEntry->pPrevCollide;
	}
	MACRO_LD_REMOVE(pHash->pList,pEntry);
	pHash->nEntry--;
	if( ppUserData ){
		/* Write a pointer to the user data */
		*ppUserData = pEntry->pUserData;
	}
	/* Release the entry */
	rc = SyMemBackendPoolFree(pHash->pAllocator,pEntry);
	return rc;
}
PH7_PRIVATE sxi32 SyHashDeleteEntry(SyHash *pHash,const void *pKey,sxu32 nKeyLen,void **ppUserData)
{
	SyHashEntry_Pr *pEntry;
	sxi32 rc;
#if defined(UNTRUST)
	if( INVALID_HASH(pHash) ){
		return SXERR_CORRUPT;
	}
#endif
	pEntry = HashGetEntry(&(*pHash),pKey,nKeyLen);
	if( pEntry == 0 ){
		return SXERR_NOTFOUND;
	}
	rc = HashDeleteEntry(&(*pHash),pEntry,ppUserData);
	return rc;
}
PH7_PRIVATE sxi32 SyHashDeleteEntry2(SyHashEntry *pEntry)
{
	SyHashEntry_Pr *pPtr = (SyHashEntry_Pr *)pEntry;
	sxi32 rc;
#if defined(UNTRUST)
	if( pPtr == 0 || INVALID_HASH(pPtr->pHash) ){
		return SXERR_CORRUPT;
	}
#endif
	rc = HashDeleteEntry(pPtr->pHash,pPtr,0);
	return rc;
}
PH7_PRIVATE sxi32 SyHashResetLoopCursor(SyHash *pHash)
{
#if defined(UNTRUST)
	if( INVALID_HASH(pHash)  ){
		return SXERR_CORRUPT;
	}
#endif
	pHash->pCurrent = pHash->pList;
	return SXRET_OK;
}
PH7_PRIVATE SyHashEntry * SyHashGetNextEntry(SyHash *pHash)
{
	SyHashEntry_Pr *pEntry;
#if defined(UNTRUST)
	if( INVALID_HASH(pHash) ){
		return 0;
	}
#endif
	if( pHash->pCurrent == 0 || pHash->nEntry <= 0 ){
		pHash->pCurrent = pHash->pList;
		return 0;
	}
	pEntry = pHash->pCurrent;
	/* Advance the cursor */
	pHash->pCurrent = pEntry->pNext;
	/* Return the current entry */
	return (SyHashEntry *)pEntry;
}
PH7_PRIVATE sxi32 SyHashForEach(SyHash *pHash,sxi32 (*xStep)(SyHashEntry *,void *),void *pUserData)
{
	SyHashEntry_Pr *pEntry;
	sxi32 rc;
	sxu32 n;
#if defined(UNTRUST)
	if( INVALID_HASH(pHash) || xStep == 0){
		return 0;
	}
#endif
	pEntry = pHash->pList;
	for( n = 0 ; n < pHash->nEntry ; n++ ){
		/* Invoke the callback */
		rc = xStep((SyHashEntry *)pEntry,pUserData);
		if( rc != SXRET_OK ){
			return rc;
		}
		/* Point to the next entry */
		pEntry = pEntry->pNext;
	}
	return SXRET_OK;
}
static sxi32 HashGrowTable(SyHash *pHash)
{
	sxu32 nNewSize = pHash->nBucketSize * 2;
	SyHashEntry_Pr *pEntry;
	SyHashEntry_Pr **apNew;
	sxu32 n,iBucket;

	/* Allocate a new larger table */
	apNew = (SyHashEntry_Pr **)SyMemBackendAlloc(pHash->pAllocator,nNewSize * sizeof(SyHashEntry_Pr *));
	if( apNew == 0 ){
		/* Not so fatal,simply a performance hit */
		return SXRET_OK;
	}
	/* Zero the new table */
	SyZero((void *)apNew,nNewSize * sizeof(SyHashEntry_Pr *));
	/* Rehash all entries */
	for( n = 0,pEntry = pHash->pList; n < pHash->nEntry ; n++  ){
		pEntry->pNextCollide = pEntry->pPrevCollide = 0;
		/* Install in the new bucket */
		iBucket = pEntry->nHash & (nNewSize - 1);
		pEntry->pNextCollide = apNew[iBucket];
		if( apNew[iBucket] != 0 ){
			apNew[iBucket]->pPrevCollide = pEntry;
		}
		apNew[iBucket] = pEntry;
		/* Point to the next entry */
		pEntry = pEntry->pNext;
	}
	/* Release the old table and reflect the change */
	SyMemBackendFree(pHash->pAllocator,(void *)pHash->apBucket);
	pHash->apBucket = apNew;
	pHash->nBucketSize = nNewSize;
	return SXRET_OK;
}
static sxi32 HashInsert(SyHash *pHash,SyHashEntry_Pr *pEntry)
{
	sxu32 iBucket = pEntry->nHash & (pHash->nBucketSize - 1);
	/* Insert the entry in its corresponding bcuket */
	pEntry->pNextCollide = pHash->apBucket[iBucket];
	if( pHash->apBucket[iBucket] != 0 ){
		pHash->apBucket[iBucket]->pPrevCollide = pEntry;
	}
	pHash->apBucket[iBucket] = pEntry;
	/* Link to the entry list */
	MACRO_LD_PUSH(pHash->pList,pEntry);
	if( pHash->nEntry == 0 ){
		pHash->pCurrent = pHash->pList;
	}
	pHash->nEntry++;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyHashInsert(SyHash *pHash,const void *pKey,sxu32 nKeyLen,void *pUserData)
{
	SyHashEntry_Pr *pEntry;
	sxi32 rc;
#if defined(UNTRUST)
	if( INVALID_HASH(pHash) || pKey == 0 ){
		return SXERR_CORRUPT;
	}
#endif
	if( pHash->nEntry >= pHash->nBucketSize * SXHASH_FILL_FACTOR ){
		rc = HashGrowTable(&(*pHash));
		if( rc != SXRET_OK ){
			return rc;
		}
	}
	/* Allocate a new hash entry */
	pEntry = (SyHashEntry_Pr *)SyMemBackendPoolAlloc(pHash->pAllocator,sizeof(SyHashEntry_Pr));
	if( pEntry == 0 ){
		return SXERR_MEM;
	}
	/* Zero the entry */
	SyZero(pEntry,sizeof(SyHashEntry_Pr));
	pEntry->pHash = pHash;
	pEntry->pKey = pKey;
	pEntry->nKeyLen = nKeyLen;
	pEntry->pUserData = pUserData;
	pEntry->nHash = pHash->xHash(pEntry->pKey,pEntry->nKeyLen);
	/* Finally insert the entry in its corresponding bucket */
	rc = HashInsert(&(*pHash),pEntry);
	return rc;
}
PH7_PRIVATE SyHashEntry * SyHashLastEntry(SyHash *pHash)
{
#if defined(UNTRUST)
	if( INVALID_HASH(pHash) ){
		return 0;
	}
#endif
	/* Last inserted entry */
	return (SyHashEntry *)pHash->pList;
}
/* SyRunTimeApi:sxutils.c */
PH7_PRIVATE sxi32 SyStrIsNumeric(const char *zSrc,sxu32 nLen,sxu8 *pReal,const char  **pzTail)
{
	const char *zCur,*zEnd;
#ifdef UNTRUST
	if( SX_EMPTY_STR(zSrc) ){
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	/* Jump leading white spaces */
	while( zSrc < zEnd && (unsigned char)zSrc[0] < 0xc0  && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zSrc < zEnd && (zSrc[0] == '+' || zSrc[0] == '-') ){
		zSrc++;
	}
	zCur = zSrc;
	if( pReal ){
		*pReal = FALSE;
	}
	for(;;){
		if( zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0]) ){ break; } zSrc++;
		if( zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0]) ){ break; } zSrc++;
		if( zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0]) ){ break; } zSrc++;
		if( zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0]) ){ break; } zSrc++;
	};
	if( zSrc < zEnd && zSrc > zCur ){
		int c = zSrc[0];
		if( c == '.' ){
			zSrc++;
			if( pReal ){
				*pReal = TRUE;
			}
			if( pzTail ){
				while( zSrc < zEnd && (unsigned char)zSrc[0] < 0xc0 && SyisDigit(zSrc[0]) ){
					zSrc++;
				}
				if( zSrc < zEnd && (zSrc[0] == 'e' || zSrc[0] == 'E') ){
					zSrc++;
					if( zSrc < zEnd && (zSrc[0] == '+' || zSrc[0] == '-') ){
						zSrc++;
					}
					while( zSrc < zEnd && (unsigned char)zSrc[0] < 0xc0 && SyisDigit(zSrc[0]) ){
						zSrc++;
					}
				}
			}
		}else if( c == 'e' || c == 'E' ){
			zSrc++;
			if( pReal ){
				*pReal = TRUE;
			}
			if( pzTail ){
				if( zSrc < zEnd && (zSrc[0] == '+' || zSrc[0] == '-') ){
					zSrc++;
				}
				while( zSrc < zEnd && (unsigned char)zSrc[0] < 0xc0 && SyisDigit(zSrc[0]) ){
					zSrc++;
				}
			}
		}
	}
	if( pzTail ){
		/* Point to the non numeric part */
		*pzTail = zSrc;
	}
	return zSrc > zCur ? SXRET_OK /* String prefix is numeric */ : SXERR_INVALID /* Not a digit stream */;
}
#define SXINT32_MIN_STR		"2147483648"
#define SXINT32_MAX_STR		"2147483647"
#define SXINT64_MIN_STR		"9223372036854775808"
#define SXINT64_MAX_STR		"9223372036854775807"
PH7_PRIVATE sxi32 SyStrToInt32(const char *zSrc,sxu32 nLen,void * pOutVal,const char **zRest)
{
	int isNeg = FALSE;
	const char *zEnd;
	sxi32 nVal = 0;
	sxi16 i;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) ){
		if( pOutVal ){
			*(sxi32 *)pOutVal = 0;
		}
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	while(zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zSrc < zEnd && ( zSrc[0] == '-' || zSrc[0] == '+' ) ){
		isNeg = (zSrc[0] == '-') ? TRUE :FALSE;
		zSrc++;
	}
	/* Skip leading zero */
	while(zSrc < zEnd && zSrc[0] == '0' ){
		zSrc++; 
	}
	i = 10;
	if( (sxu32)(zEnd-zSrc) >= 10 ){
		/* Handle overflow */
		i = SyMemcmp(zSrc,(isNeg == TRUE) ? SXINT32_MIN_STR : SXINT32_MAX_STR,nLen) <= 0 ? 10 : 9; 
	}
	for(;;){
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
	}
	/* Skip trailing spaces */
	while(zSrc < zEnd && SyisSpace(zSrc[0])){
		zSrc++;
	}
	if( zRest ){
		*zRest = (char *)zSrc;
	}	
	if( pOutVal ){
		if( isNeg == TRUE && nVal != 0 ){
			nVal = -nVal;
		}
		*(sxi32 *)pOutVal = nVal;
	}
	return (zSrc >= zEnd) ? SXRET_OK : SXERR_SYNTAX;
}
PH7_PRIVATE sxi32 SyStrToInt64(const char *zSrc,sxu32 nLen,void * pOutVal,const char **zRest)
{
	int isNeg = FALSE;
	const char *zEnd;
	sxi64 nVal;
	sxi16 i;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) ){
		if( pOutVal ){
			*(sxi32 *)pOutVal = 0;
		}
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	while(zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zSrc < zEnd && ( zSrc[0] == '-' || zSrc[0] == '+' ) ){
		isNeg = (zSrc[0] == '-') ? TRUE :FALSE;
		zSrc++;
	}
	/* Skip leading zero */
	while(zSrc < zEnd && zSrc[0] == '0' ){
		zSrc++;
	}
	i = 19;
	if( (sxu32)(zEnd-zSrc) >= 19 ){
		i = SyMemcmp(zSrc,isNeg ? SXINT64_MIN_STR : SXINT64_MAX_STR,19) <= 0 ? 19 : 18 ;
	}
	nVal = 0;
	for(;;){
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])){ break; } nVal = nVal * 10 + ( zSrc[0] - '0' ) ; --i ; zSrc++;
	}
	/* Skip trailing spaces */
	while(zSrc < zEnd && SyisSpace(zSrc[0])){
		zSrc++;
	}
	if( zRest ){
		*zRest = (char *)zSrc;
	}	
	if( pOutVal ){
		if( isNeg == TRUE && nVal != 0 ){
			nVal = -nVal;
		}
		*(sxi64 *)pOutVal = nVal;
	}
	return (zSrc >= zEnd) ? SXRET_OK : SXERR_SYNTAX;
}
PH7_PRIVATE sxi32 SyHexToint(sxi32 c)
{
	switch(c){
	case '0': return 0;
	case '1': return 1;
	case '2': return 2;
	case '3': return 3;
	case '4': return 4;
	case '5': return 5;
	case '6': return 6;
	case '7': return 7;
	case '8': return 8;
	case '9': return 9;
	case 'A': case 'a': return 10;
	case 'B': case 'b': return 11;
	case 'C': case 'c': return 12;
	case 'D': case 'd': return 13;
	case 'E': case 'e': return 14;
	case 'F': case 'f': return 15;
	}
	return -1; 	
}
PH7_PRIVATE sxi32 SyHexStrToInt64(const char *zSrc,sxu32 nLen,void * pOutVal,const char **zRest)
{
	const char *zIn,*zEnd;
	int isNeg = FALSE;
	sxi64 nVal = 0;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) ){
		if( pOutVal ){
			*(sxi32 *)pOutVal = 0;
		}
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	while( zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zSrc < zEnd && ( *zSrc == '-' || *zSrc == '+' ) ){
		isNeg = (zSrc[0] == '-') ? TRUE :FALSE;
		zSrc++;
	}
	if( zSrc < &zEnd[-2] && zSrc[0] == '0' && (zSrc[1] == 'x' || zSrc[1] == 'X') ){
		/* Bypass hex prefix */
		zSrc += sizeof(char) * 2;
	}	
	/* Skip leading zero */
	while(zSrc < zEnd && zSrc[0] == '0' ){
		zSrc++;
	}
	zIn = zSrc;
	for(;;){
		if(zSrc >= zEnd || !SyisHex(zSrc[0]) || (int)(zSrc-zIn) > 15) break; nVal = nVal * 16 + SyHexToint(zSrc[0]);  zSrc++ ;
		if(zSrc >= zEnd || !SyisHex(zSrc[0]) || (int)(zSrc-zIn) > 15) break; nVal = nVal * 16 + SyHexToint(zSrc[0]);  zSrc++ ;
		if(zSrc >= zEnd || !SyisHex(zSrc[0]) || (int)(zSrc-zIn) > 15) break; nVal = nVal * 16 + SyHexToint(zSrc[0]);  zSrc++ ;
		if(zSrc >= zEnd || !SyisHex(zSrc[0]) || (int)(zSrc-zIn) > 15) break; nVal = nVal * 16 + SyHexToint(zSrc[0]);  zSrc++ ;
	}
	while( zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}	
	if( zRest ){
		*zRest = zSrc;
	}
	if( pOutVal ){
		if( isNeg == TRUE && nVal != 0 ){
			nVal = -nVal;
		}
		*(sxi64 *)pOutVal = nVal;
	}
	return zSrc >= zEnd ? SXRET_OK : SXERR_SYNTAX;
}
PH7_PRIVATE sxi32 SyOctalStrToInt64(const char *zSrc,sxu32 nLen,void * pOutVal,const char **zRest)
{
	const char *zIn,*zEnd;
	int isNeg = FALSE;
	sxi64 nVal = 0;
	int c;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) ){
		if( pOutVal ){
			*(sxi32 *)pOutVal = 0;
		}
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	while(zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zSrc < zEnd && ( zSrc[0] == '-' || zSrc[0] == '+' ) ){
		isNeg = (zSrc[0] == '-') ? TRUE :FALSE;
		zSrc++;
	}
	/* Skip leading zero */
	while(zSrc < zEnd && zSrc[0] == '0' ){
		zSrc++; 
	}
	zIn = zSrc;
	for(;;){
		if(zSrc >= zEnd || !SyisDigit(zSrc[0])){ break; } if( (c=zSrc[0]-'0') > 7 || (int)(zSrc-zIn) > 20){ break;} nVal = nVal * 8 +  c; zSrc++;
		if(zSrc >= zEnd || !SyisDigit(zSrc[0])){ break; } if( (c=zSrc[0]-'0') > 7 || (int)(zSrc-zIn) > 20){ break;} nVal = nVal * 8 +  c; zSrc++;
		if(zSrc >= zEnd || !SyisDigit(zSrc[0])){ break; } if( (c=zSrc[0]-'0') > 7 || (int)(zSrc-zIn) > 20){ break;} nVal = nVal * 8 +  c; zSrc++;
		if(zSrc >= zEnd || !SyisDigit(zSrc[0])){ break; } if( (c=zSrc[0]-'0') > 7 || (int)(zSrc-zIn) > 20){ break;} nVal = nVal * 8 +  c; zSrc++;
	}
	/* Skip trailing spaces */
	while(zSrc < zEnd && SyisSpace(zSrc[0])){
		zSrc++;
	}
	if( zRest ){
		*zRest = zSrc;
	}	
	if( pOutVal ){
		if( isNeg == TRUE && nVal != 0 ){
			nVal = -nVal;
		}
		*(sxi64 *)pOutVal = nVal;
	}
	return (zSrc >= zEnd) ? SXRET_OK : SXERR_SYNTAX;
}
PH7_PRIVATE sxi32 SyBinaryStrToInt64(const char *zSrc,sxu32 nLen,void * pOutVal,const char **zRest)
{
	const char *zIn,*zEnd;
	int isNeg = FALSE;
	sxi64 nVal = 0;
	int c;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) ){
		if( pOutVal ){
			*(sxi32 *)pOutVal = 0;
		}
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	while(zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zSrc < zEnd && ( zSrc[0] == '-' || zSrc[0] == '+' ) ){
		isNeg = (zSrc[0] == '-') ? TRUE :FALSE;
		zSrc++;
	}
	if( zSrc < &zEnd[-2] && zSrc[0] == '0' && (zSrc[1] == 'b' || zSrc[1] == 'B') ){
		/* Bypass binary prefix */
		zSrc += sizeof(char) * 2;
	}
	/* Skip leading zero */
	while(zSrc < zEnd && zSrc[0] == '0' ){
		zSrc++; 
	}
	zIn = zSrc;
	for(;;){
		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc-zIn) > 62){ break; } c = zSrc[0] - '0'; nVal = (nVal << 1) + c; zSrc++;
		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc-zIn) > 62){ break; } c = zSrc[0] - '0'; nVal = (nVal << 1) + c; zSrc++;
		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc-zIn) > 62){ break; } c = zSrc[0] - '0'; nVal = (nVal << 1) + c; zSrc++;
		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc-zIn) > 62){ break; } c = zSrc[0] - '0'; nVal = (nVal << 1) + c; zSrc++;
	}
	/* Skip trailing spaces */
	while(zSrc < zEnd && SyisSpace(zSrc[0])){
		zSrc++;
	}
	if( zRest ){
		*zRest = zSrc;
	}	
	if( pOutVal ){
		if( isNeg == TRUE && nVal != 0 ){
			nVal = -nVal;
		}
		*(sxi64 *)pOutVal = nVal;
	}
	return (zSrc >= zEnd) ? SXRET_OK : SXERR_SYNTAX;
}
PH7_PRIVATE sxi32 SyStrToReal(const char *zSrc,sxu32 nLen,void * pOutVal,const char **zRest)
{
#define SXDBL_DIG        15
#define SXDBL_MAX_EXP    308
#define SXDBL_MIN_EXP_PLUS	307
	static const sxreal aTab[] = {
	10,
	1.0e2,
	1.0e4,
	1.0e8,
	1.0e16,
	1.0e32,
	1.0e64,
	1.0e128,
	1.0e256
	};
	sxu8 neg = FALSE;
	sxreal Val = 0.0;
	const char *zEnd;
	sxi32 Lim,exp;
	sxreal *p = 0;
#ifdef UNTRUST
	if( SX_EMPTY_STR(zSrc)  ){
		if( pOutVal ){
			*(sxreal *)pOutVal = 0.0;
		}
		return SXERR_EMPTY;
	}
#endif
	zEnd = &zSrc[nLen];
	while( zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++; 
	}
	if( zSrc < zEnd && (zSrc[0] == '-' || zSrc[0] == '+' ) ){
		neg =  zSrc[0] == '-' ? TRUE : FALSE ;
		zSrc++;
	}
	Lim = SXDBL_DIG ;
	for(;;){
		if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; zSrc++ ; --Lim;
		if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; zSrc++ ; --Lim;
		if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; zSrc++ ; --Lim;
		if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; zSrc++ ; --Lim;
	}
	if( zSrc < zEnd && ( zSrc[0] == '.' || zSrc[0] == ',' ) ){
		sxreal dec = 1.0;
		zSrc++;
		for(;;){
			if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; dec *= 10.0; zSrc++ ;--Lim;
			if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; dec *= 10.0; zSrc++ ;--Lim;
			if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; dec *= 10.0; zSrc++ ;--Lim;
			if(zSrc >= zEnd||!Lim||!SyisDigit(zSrc[0])) break ; Val = Val * 10.0 + (zSrc[0] - '0') ; dec *= 10.0; zSrc++ ;--Lim;
		}
		Val /= dec;
	}
	if( neg == TRUE && Val != 0.0 ) {
		Val = -Val ; 
	}
	if( Lim <= 0 ){
		/* jump overflow digit */
		while( zSrc < zEnd ){
			if( zSrc[0] == 'e' || zSrc[0] == 'E' ){
				break;  
			}
			zSrc++;
		}
	}
	neg = FALSE;
	if( zSrc < zEnd && ( zSrc[0] == 'e' || zSrc[0] == 'E' ) ){
		zSrc++;
		if( zSrc < zEnd && ( zSrc[0] == '-' || zSrc[0] == '+') ){
			neg = zSrc[0] == '-' ? TRUE : FALSE ;
			zSrc++;
		}
		exp = 0;
		while( zSrc < zEnd && SyisDigit(zSrc[0]) && exp < SXDBL_MAX_EXP ){
			exp = exp * 10 + (zSrc[0] - '0');
			zSrc++;
		}
		if( neg  ){
			if( exp > SXDBL_MIN_EXP_PLUS ) exp = SXDBL_MIN_EXP_PLUS ;
		}else if ( exp > SXDBL_MAX_EXP ){
			exp = SXDBL_MAX_EXP; 
		}		
		for( p = (sxreal *)aTab ; exp ; exp >>= 1 , p++ ){
			if( exp & 01 ){
				if( neg ){
					Val /= *p ;
				}else{
					Val *= *p;
				}
			}
		}
	}
	while( zSrc < zEnd && SyisSpace(zSrc[0]) ){
		zSrc++;
	}
	if( zRest ){
		*zRest = zSrc; 
	}
	if( pOutVal ){
		*(sxreal *)pOutVal = Val;
	}
	return zSrc >= zEnd ? SXRET_OK : SXERR_SYNTAX;
}
/* SyRunTimeApi:sxlib.c  */
static sxu32 SyBinHash(const void *pSrc,sxu32 nLen)
{
	register unsigned char *zIn = (unsigned char *)pSrc;
	unsigned char *zEnd;
	sxu32 nH = 5381;
	zEnd = &zIn[nLen];
	for(;;){
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
	}	
	return nH;
}
PH7_PRIVATE sxu32 SyStrHash(const void *pSrc,sxu32 nLen)
{
	register unsigned char *zIn = (unsigned char *)pSrc;
	unsigned char *zEnd;
	sxu32 nH = 5381;	
	zEnd = &zIn[nLen];
	for(;;){
		if( zIn >= zEnd ){ break; } nH = nH * 33 + SyToLower(zIn[0]); zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + SyToLower(zIn[0]); zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + SyToLower(zIn[0]); zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + SyToLower(zIn[0]); zIn++;
	}	
	return nH;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyBase64Encode(const char *zSrc,sxu32 nLen,ProcConsumer xConsumer,void *pUserData)
{
	static const unsigned char zBase64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	unsigned char *zIn = (unsigned char *)zSrc;
	unsigned char z64[4];
	sxu32 i;
	sxi32 rc;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) || xConsumer == 0){
		return SXERR_EMPTY;
	}
#endif
	for(i = 0; i + 2 < nLen; i += 3){
		z64[0] = zBase64[(zIn[i] >> 2) & 0x3F];
		z64[1] = zBase64[( ((zIn[i] & 0x03) << 4)   | (zIn[i+1] >> 4)) & 0x3F]; 
		z64[2] = zBase64[( ((zIn[i+1] & 0x0F) << 2) | (zIn[i + 2] >> 6) ) & 0x3F];
		z64[3] = zBase64[ zIn[i + 2] & 0x3F];
		
		rc = xConsumer((const void *)z64,sizeof(z64),pUserData);
		if( rc != SXRET_OK ){return SXERR_ABORT;}

	}	
	if ( i+1 < nLen ){
		z64[0] = zBase64[(zIn[i] >> 2) & 0x3F];
		z64[1] = zBase64[( ((zIn[i] & 0x03) << 4)   | (zIn[i+1] >> 4)) & 0x3F]; 
		z64[2] = zBase64[(zIn[i+1] & 0x0F) << 2 ];
		z64[3] = '=';
		
		rc = xConsumer((const void *)z64,sizeof(z64),pUserData);
		if( rc != SXRET_OK ){return SXERR_ABORT;}

	}else if( i < nLen ){
		z64[0] = zBase64[(zIn[i] >> 2) & 0x3F];
		z64[1]   = zBase64[(zIn[i] & 0x03) << 4];
		z64[2] = '=';
		z64[3] = '=';
		
		rc = xConsumer((const void *)z64,sizeof(z64),pUserData);
		if( rc != SXRET_OK ){return SXERR_ABORT;}
	}

	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyBase64Decode(const char *zB64,sxu32 nLen,ProcConsumer xConsumer,void *pUserData)
{
	static const sxu32 aBase64Trans[] = {
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,62,0,0,0,63,52,53,54,55,56,57,58,59,60,61,0,0,0,0,0,0,0,0,1,2,3,4,
	5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,0,0,0,0,0,0,26,27,
	28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,0,0,
	0,0,0
	};
	sxu32 n,w,x,y,z;
	sxi32 rc;
	unsigned char zOut[10];
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zB64) || xConsumer == 0 ){
		return SXERR_EMPTY;
	}
#endif
	while(nLen > 0 && zB64[nLen - 1] == '=' ){
		nLen--;
	}
	for( n = 0 ; n+3<nLen ; n += 4){
		w = aBase64Trans[zB64[n] & 0x7F];
		x = aBase64Trans[zB64[n+1] & 0x7F];
		y = aBase64Trans[zB64[n+2] & 0x7F];
		z = aBase64Trans[zB64[n+3] & 0x7F];
		zOut[0] = ((w<<2) & 0xFC) | ((x>>4) & 0x03);
		zOut[1] = ((x<<4) & 0xF0) | ((y>>2) & 0x0F);
		zOut[2] = ((y<<6) & 0xC0) | (z & 0x3F);

		rc = xConsumer((const void *)zOut,sizeof(unsigned char)*3,pUserData);
		if( rc != SXRET_OK ){ return SXERR_ABORT;}
	}
	if( n+2 < nLen ){
		w = aBase64Trans[zB64[n] & 0x7F];
		x = aBase64Trans[zB64[n+1] & 0x7F];
		y = aBase64Trans[zB64[n+2] & 0x7F];

		zOut[0] = ((w<<2) & 0xFC) | ((x>>4) & 0x03);
		zOut[1] = ((x<<4) & 0xF0) | ((y>>2) & 0x0F);

		rc = xConsumer((const void *)zOut,sizeof(unsigned char)*2,pUserData);
		if( rc != SXRET_OK ){ return SXERR_ABORT;}
	}else if( n+1 < nLen ){
		w = aBase64Trans[zB64[n] & 0x7F];
		x = aBase64Trans[zB64[n+1] & 0x7F];

		zOut[0] = ((w<<2) & 0xFC) | ((x>>4) & 0x03);

		rc = xConsumer((const void *)zOut,sizeof(unsigned char)*1,pUserData);
		if( rc != SXRET_OK ){ return SXERR_ABORT;}
	}
	return SXRET_OK;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
#define INVALID_LEXER(LEX)	(  LEX == 0  || LEX->xTokenizer == 0 )
PH7_PRIVATE sxi32 SyLexInit(SyLex *pLex,SySet *pSet,ProcTokenizer xTokenizer,void *pUserData)
{
	SyStream *pStream;
#if defined (UNTRUST)
	if ( pLex == 0 || xTokenizer == 0 ){
		return SXERR_CORRUPT;
	}
#endif
	pLex->pTokenSet = 0;
	/* Initialize lexer fields */
	if( pSet ){
		if ( SySetElemSize(pSet) != sizeof(SyToken) ){
			return SXERR_INVALID;
		}
		pLex->pTokenSet = pSet;
	}
	pStream = &pLex->sStream;
	pLex->xTokenizer = xTokenizer;
	pLex->pUserData = pUserData;
	
	pStream->nLine = 1;
	pStream->nIgn  = 0;
	pStream->zText = pStream->zEnd = 0;
	pStream->pSet  = pSet;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyLexTokenizeInput(SyLex *pLex,const char *zInput,sxu32 nLen,void *pCtxData,ProcSort xSort,ProcCmp xCmp)
{
	const unsigned char *zCur;
	SyStream *pStream;
	SyToken sToken;
	sxi32 rc;
#if defined (UNTRUST)
	if ( INVALID_LEXER(pLex) || zInput == 0 ){
		return SXERR_CORRUPT;
	}
#endif
	pStream = &pLex->sStream;
	/* Point to the head of the input */
	pStream->zText = pStream->zInput = (const unsigned char *)zInput;
	/* Point to the end of the input */
	pStream->zEnd = &pStream->zInput[nLen];
	for(;;){
		if( pStream->zText >= pStream->zEnd ){
			/* End of the input reached */
			break;
		}
		zCur = pStream->zText;
		/* Call the tokenizer callback */
		rc = pLex->xTokenizer(pStream,&sToken,pLex->pUserData,pCtxData);
		if( rc != SXRET_OK && rc != SXERR_CONTINUE ){
			/* Tokenizer callback request an operation abort */
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			break;
		}
		if( rc == SXERR_CONTINUE ){
			/* Request to ignore this token */
			pStream->nIgn++;
		}else if( pLex->pTokenSet  ){
			/* Put the token in the set */
			rc = SySetPut(pLex->pTokenSet,(const void *)&sToken);
			if( rc != SXRET_OK ){
				break;
			}
		}
		if( zCur >= pStream->zText ){
			/* Automatic advance of the stream cursor */
			pStream->zText = &zCur[1];
		}
	}
	if( xSort &&  pLex->pTokenSet ){
		SyToken *aToken = (SyToken *)SySetBasePtr(pLex->pTokenSet);
		/* Sort the extrated tokens */
		if( xCmp == 0 ){
			/* Use a default comparison function */
			xCmp = SyMemcmp;
		}
		xSort(aToken,SySetUsed(pLex->pTokenSet),sizeof(SyToken),xCmp);
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyLexRelease(SyLex *pLex)
{
	sxi32 rc = SXRET_OK;
#if defined (UNTRUST)
	if ( INVALID_LEXER(pLex) ){
		return SXERR_CORRUPT;
	}
#else
	SXUNUSED(pLex); /* Prevent compiler warning */
#endif
	return rc;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
#define SAFE_HTTP(C)	(SyisAlphaNum(c) || c == '_' || c == '-' || c == '$' || c == '.' )
PH7_PRIVATE sxi32 SyUriEncode(const char *zSrc,sxu32 nLen,ProcConsumer xConsumer,void *pUserData)
{
	unsigned char *zIn = (unsigned char *)zSrc;
	unsigned char zHex[3] = { '%',0,0 };
	unsigned char zOut[2];
	unsigned char *zCur,*zEnd;
	sxi32 c;
	sxi32 rc;
#ifdef UNTRUST
	if( SX_EMPTY_STR(zSrc) || xConsumer == 0 ){
		return SXERR_EMPTY;
	}
#endif
	rc = SXRET_OK;
	zEnd = &zIn[nLen]; zCur = zIn;
	for(;;){
		if( zCur >= zEnd ){
			if( zCur != zIn ){
				rc = xConsumer(zIn,(sxu32)(zCur-zIn),pUserData);
			}
			break;
		}
		c = zCur[0];
		if( SAFE_HTTP(c) ){
			zCur++; continue;
		}
		if( zCur != zIn && SXRET_OK != (rc = xConsumer(zIn,(sxu32)(zCur-zIn),pUserData))){
			break;
		}		
		if( c == ' ' ){
			zOut[0] = '+';
			rc = xConsumer((const void *)zOut,sizeof(unsigned char),pUserData);
		}else{
			zHex[1]	= "0123456789ABCDEF"[(c >> 4) & 0x0F];
			zHex[2] = "0123456789ABCDEF"[c & 0x0F];
			rc = xConsumer(zHex,sizeof(zHex),pUserData);
		}
		if( SXRET_OK != rc ){
			break;
		}				
		zIn = &zCur[1]; zCur = zIn ;
	}
	return rc == SXRET_OK ? SXRET_OK : SXERR_ABORT;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
static sxi32 SyAsciiToHex(sxi32 c)
{
	if( c >= 'a' && c <= 'f' ){
		c += 10 - 'a';
		return c;
	}
	if( c >= '0' && c <= '9' ){
		c -= '0';
		return c;
	}
	if( c >= 'A' && c <= 'F') {
		c += 10 - 'A';
		return c;
	}		
	return 0; 
}
PH7_PRIVATE sxi32 SyUriDecode(const char *zSrc,sxu32 nLen,ProcConsumer xConsumer,void *pUserData,int bUTF8)
{
	static const sxu8 Utf8Trans[] = {
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
		0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
		0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x00, 0x00
	};
	const char *zIn = zSrc;
	const char *zEnd;
	const char *zCur;
	sxu8 *zOutPtr;
	sxu8 zOut[10];
	sxi32 c,d;
	sxi32 rc;
#if defined(UNTRUST)
	if( SX_EMPTY_STR(zSrc) || xConsumer == 0 ){
		return SXERR_EMPTY;
	}
#endif
	rc = SXRET_OK;
	zEnd = &zSrc[nLen];
	zCur = zIn;
	for(;;){
		while(zCur < zEnd && zCur[0] != '%' && zCur[0] != '+' ){
			zCur++;
		}
		if( zCur != zIn ){
			/* Consume input */
			rc = xConsumer(zIn,(unsigned int)(zCur-zIn),pUserData);
			if( rc != SXRET_OK ){
				/* User consumer routine request an operation abort */
				break;
			}
		}
		if( zCur >= zEnd ){
			rc = SXRET_OK;
			break;
		}
		/* Decode unsafe HTTP characters */
		zOutPtr = zOut;
		if( zCur[0] == '+' ){
			*zOutPtr++ = ' ';
			zCur++;
		}else{
			if( &zCur[2] >= zEnd ){
				rc = SXERR_OVERFLOW;
				break;
			}
			c = (SyAsciiToHex(zCur[1]) <<4) | SyAsciiToHex(zCur[2]);
			zCur += 3;
			if( c < 0x000C0 ){
				*zOutPtr++ = (sxu8)c;
			}else{
				c = Utf8Trans[c-0xC0];
				while( zCur[0] == '%' ){
					d = (SyAsciiToHex(zCur[1]) <<4) | SyAsciiToHex(zCur[2]);
					if( (d&0xC0) != 0x80 ){
						break;
					}
					c = (c<<6) + (0x3f & d);
					zCur += 3;
				}
				if( bUTF8 == FALSE ){
					*zOutPtr++ = (sxu8)c;
				}else{
					SX_WRITE_UTF8(zOutPtr,c);
				}
			}
			
		}
		/* Consume the decoded characters */
		rc = xConsumer((const void *)zOut,(unsigned int)(zOutPtr-zOut),pUserData);
		if( rc != SXRET_OK ){
			break;
		}
		/* Synchronize pointers */
		zIn = zCur;
	}
	return rc;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
static const char *zEngDay[] = { 
	"Sunday","Monday","Tuesday","Wednesday",
	"Thursday","Friday","Saturday"
};
static const char *zEngMonth[] = {
	"January","February","March","April",
	"May","June","July","August",
	"September","October","November","December"
};
static const char * GetDay(sxi32 i)
{
	return zEngDay[ i % 7 ];
}
static const char * GetMonth(sxi32 i)
{
	return zEngMonth[ i % 12 ];
}
PH7_PRIVATE const char * SyTimeGetDay(sxi32 iDay)
{
	return GetDay(iDay);
}
PH7_PRIVATE const char * SyTimeGetMonth(sxi32 iMonth)
{
	return GetMonth(iMonth);
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/* SyRunTimeApi: sxfmt.c */
#define SXFMT_BUFSIZ 1024 /* Conversion buffer size */
/*
** Conversion types fall into various categories as defined by the
** following enumeration.
*/
#define SXFMT_RADIX       1 /* Integer types.%d, %x, %o, and so forth */
#define SXFMT_FLOAT       2 /* Floating point.%f */
#define SXFMT_EXP         3 /* Exponentional notation.%e and %E */
#define SXFMT_GENERIC     4 /* Floating or exponential, depending on exponent.%g */
#define SXFMT_SIZE        5 /* Total number of characters processed so far.%n */
#define SXFMT_STRING      6 /* Strings.%s */
#define SXFMT_PERCENT     7 /* Percent symbol.%% */
#define SXFMT_CHARX       8 /* Characters.%c */
#define SXFMT_ERROR       9 /* Used to indicate no such conversion type */
/* Extension by Symisc Systems */
#define SXFMT_RAWSTR     13 /* %z Pointer to raw string (SyString *) */
#define SXFMT_UNUSED     15 
/*
** Allowed values for SyFmtInfo.flags
*/
#define SXFLAG_SIGNED	0x01
#define SXFLAG_UNSIGNED 0x02
/* Allowed values for SyFmtConsumer.nType */
#define SXFMT_CONS_PROC		1	/* Consumer is a procedure */
#define SXFMT_CONS_STR		2	/* Consumer is a managed string */
#define SXFMT_CONS_FILE		5	/* Consumer is an open File */
#define SXFMT_CONS_BLOB		6	/* Consumer is a BLOB */
/*
** Each builtin conversion character (ex: the 'd' in "%d") is described
** by an instance of the following structure
*/
typedef struct SyFmtInfo SyFmtInfo;
struct SyFmtInfo
{
  char fmttype;  /* The format field code letter [i.e: 'd','s','x'] */
  sxu8 base;     /* The base for radix conversion */
  int flags;    /* One or more of SXFLAG_ constants below */
  sxu8 type;     /* Conversion paradigm */
  char *charset; /* The character set for conversion */
  char *prefix;  /* Prefix on non-zero values in alt format */
};
typedef struct SyFmtConsumer SyFmtConsumer;
struct SyFmtConsumer
{
	sxu32 nLen; /* Total output length */
	sxi32 nType; /* Type of the consumer see below */
	sxi32 rc;	/* Consumer return value;Abort processing if rc != SXRET_OK */
 union{
	struct{	
	ProcConsumer xUserConsumer;
	void *pUserData;
	}sFunc;  
	SyBlob *pBlob;
 }uConsumer;	
}; 
#ifndef SX_OMIT_FLOATINGPOINT
static int getdigit(sxlongreal *val,int *cnt)
{
  sxlongreal d;
  int digit;

  if( (*cnt)++ >= 16 ){
	  return '0';
  }
  digit = (int)*val;
  d = digit;
   *val = (*val - d)*10.0;
  return digit + '0' ;
}
#endif /* SX_OMIT_FLOATINGPOINT */
/*
 * The following routine was taken from the SQLITE2 source tree and was
 * extended by Symisc Systems to fit its need.
 * Status: Public Domain
 */
static sxi32 InternFormat(ProcConsumer xConsumer,void *pUserData,const char *zFormat,va_list ap)
{
	/*
	 * The following table is searched linearly, so it is good to put the most frequently
	 * used conversion types first.
	 */
static const SyFmtInfo aFmt[] = {
  {  'd', 10, SXFLAG_SIGNED, SXFMT_RADIX, "0123456789",0    },
  {  's',  0, 0, SXFMT_STRING,     0,                  0    },
  {  'c',  0, 0, SXFMT_CHARX,      0,                  0    },
  {  'x', 16, 0, SXFMT_RADIX,      "0123456789abcdef", "x0" },
  {  'X', 16, 0, SXFMT_RADIX,      "0123456789ABCDEF", "X0" },
         /* -- Extensions by Symisc Systems -- */
  {  'z',  0, 0, SXFMT_RAWSTR,     0,                   0   }, /* Pointer to a raw string (SyString *) */
  {  'B',  2, 0, SXFMT_RADIX,      "01",                "b0"},
         /* -- End of Extensions -- */
  {  'o',  8, 0, SXFMT_RADIX,      "01234567",         "0"  },
  {  'u', 10, 0, SXFMT_RADIX,      "0123456789",       0    },
#ifndef SX_OMIT_FLOATINGPOINT
  {  'f',  0, SXFLAG_SIGNED, SXFMT_FLOAT,       0,     0    },
  {  'e',  0, SXFLAG_SIGNED, SXFMT_EXP,        "e",    0    },
  {  'E',  0, SXFLAG_SIGNED, SXFMT_EXP,        "E",    0    },
  {  'g',  0, SXFLAG_SIGNED, SXFMT_GENERIC,    "e",    0    },
  {  'G',  0, SXFLAG_SIGNED, SXFMT_GENERIC,    "E",    0    },
#endif
  {  'i', 10, SXFLAG_SIGNED, SXFMT_RADIX,"0123456789", 0    },
  {  'n',  0, 0, SXFMT_SIZE,       0,                  0    },
  {  '%',  0, 0, SXFMT_PERCENT,    0,                  0    },
  {  'p', 10, 0, SXFMT_RADIX,      "0123456789",       0    }
};
  int c;                     /* Next character in the format string */
  char *bufpt;               /* Pointer to the conversion buffer */
  int precision;             /* Precision of the current field */
  int length;                /* Length of the field */
  int idx;                   /* A general purpose loop counter */
  int width;                 /* Width of the current field */
  sxu8 flag_leftjustify;   /* True if "-" flag is present */
  sxu8 flag_plussign;      /* True if "+" flag is present */
  sxu8 flag_blanksign;     /* True if " " flag is present */
  sxu8 flag_alternateform; /* True if "#" flag is present */
  sxu8 flag_zeropad;       /* True if field width constant starts with zero */
  sxu8 flag_long;          /* True if "l" flag is present */
  sxi64 longvalue;         /* Value for integer types */
  const SyFmtInfo *infop;  /* Pointer to the appropriate info structure */
  char buf[SXFMT_BUFSIZ];  /* Conversion buffer */
  char prefix;             /* Prefix character."+" or "-" or " " or '\0'.*/
  sxu8 errorflag = 0;      /* True if an error is encountered */
  sxu8 xtype;              /* Conversion paradigm */
  char *zExtra;    
  static char spaces[] = "                                                  ";
#define etSPACESIZE ((int)sizeof(spaces)-1)
#ifndef SX_OMIT_FLOATINGPOINT
  sxlongreal realvalue;    /* Value for real types */
  int  exp;                /* exponent of real numbers */
  double rounder;          /* Used for rounding floating point values */
  sxu8 flag_dp;            /* True if decimal point should be shown */
  sxu8 flag_rtz;           /* True if trailing zeros should be removed */
  sxu8 flag_exp;           /* True to force display of the exponent */
  int nsd;                 /* Number of significant digits returned */
#endif
  int rc;

  length = 0;
  bufpt = 0;
  for(; (c=(*zFormat))!=0; ++zFormat){
    if( c!='%' ){
      unsigned int amt;
      bufpt = (char *)zFormat;
      amt = 1;
      while( (c=(*++zFormat))!='%' && c!=0 ) amt++;
	  rc = xConsumer((const void *)bufpt,amt,pUserData);
	  if( rc != SXRET_OK ){
		  return SXERR_ABORT; /* Consumer routine request an operation abort */
	  }
      if( c==0 ){
		  return errorflag > 0 ? SXERR_FORMAT : SXRET_OK;
	  }
    }
    if( (c=(*++zFormat))==0 ){
      errorflag = 1;
	  rc = xConsumer("%",sizeof("%")-1,pUserData);
	  if( rc != SXRET_OK ){
		  return SXERR_ABORT; /* Consumer routine request an operation abort */
	  }
      return errorflag > 0 ? SXERR_FORMAT : SXRET_OK;
    }
    /* Find out what flags are present */
    flag_leftjustify = flag_plussign = flag_blanksign = 
     flag_alternateform = flag_zeropad = 0;
    do{
      switch( c ){
        case '-':   flag_leftjustify = 1;     c = 0;   break;
        case '+':   flag_plussign = 1;        c = 0;   break;
        case ' ':   flag_blanksign = 1;       c = 0;   break;
        case '#':   flag_alternateform = 1;   c = 0;   break;
        case '0':   flag_zeropad = 1;         c = 0;   break;
        default:                                       break;
      }
    }while( c==0 && (c=(*++zFormat))!=0 );
    /* Get the field width */
    width = 0;
    if( c=='*' ){
      width = va_arg(ap,int);
      if( width<0 ){
        flag_leftjustify = 1;
        width = -width;
      }
      c = *++zFormat;
    }else{
      while( c>='0' && c<='9' ){
        width = width*10 + c - '0';
        c = *++zFormat;
      }
    }
    if( width > SXFMT_BUFSIZ-10 ){
      width = SXFMT_BUFSIZ-10;
    }
    /* Get the precision */
	precision = -1;
    if( c=='.' ){
      precision = 0;
      c = *++zFormat;
      if( c=='*' ){
        precision = va_arg(ap,int);
        if( precision<0 ) precision = -precision;
        c = *++zFormat;
      }else{
        while( c>='0' && c<='9' ){
          precision = precision*10 + c - '0';
          c = *++zFormat;
        }
      }
    }
    /* Get the conversion type modifier */
	flag_long = 0;
    if( c=='l' || c == 'q' /* BSD quad (expect a 64-bit integer) */ ){
      flag_long = (c == 'q') ? 2 : 1;
      c = *++zFormat;
	  if( c == 'l' ){
		  /* Standard printf emulation 'lld' (expect a 64bit integer) */
		  flag_long = 2;
	  }
    }
    /* Fetch the info entry for the field */
    infop = 0;
    xtype = SXFMT_ERROR;
	for(idx=0; idx< (int)SX_ARRAYSIZE(aFmt); idx++){
      if( c==aFmt[idx].fmttype ){
        infop = &aFmt[idx];
		xtype = infop->type;
        break;
      }
    }
    zExtra = 0;

    /*
    ** At this point, variables are initialized as follows:
    **
    **   flag_alternateform          TRUE if a '#' is present.
    **   flag_plussign               TRUE if a '+' is present.
    **   flag_leftjustify            TRUE if a '-' is present or if the
    **                               field width was negative.
    **   flag_zeropad                TRUE if the width began with 0.
    **   flag_long                   TRUE if the letter 'l' (ell) or 'q'(BSD quad) prefixed
    **                               the conversion character.
    **   flag_blanksign              TRUE if a ' ' is present.
    **   width                       The specified field width.This is
    **                               always non-negative.Zero is the default.
    **   precision                   The specified precision.The default
    **                               is -1.
    **   xtype                       The class of the conversion.
    **   infop                       Pointer to the appropriate info struct.
    */
    switch( xtype ){
      case SXFMT_RADIX:
        if( flag_long > 0 ){
			if( flag_long > 1 ){
				/* BSD quad: expect a 64-bit integer */
				longvalue = va_arg(ap,sxi64);
			}else{
				longvalue = va_arg(ap,sxlong);
			}
		}else{
			if( infop->flags & SXFLAG_SIGNED ){
				longvalue = va_arg(ap,sxi32);
			}else{
				longvalue = va_arg(ap,sxu32);
			}
		}
		/* Limit the precision to prevent overflowing buf[] during conversion */
      if( precision>SXFMT_BUFSIZ-40 ) precision = SXFMT_BUFSIZ-40;
#if 1
        /* For the format %#x, the value zero is printed "0" not "0x0".
        ** I think this is stupid.*/
        if( longvalue==0 ) flag_alternateform = 0;
#else
        /* More sensible: turn off the prefix for octal (to prevent "00"),
        ** but leave the prefix for hex.*/
        if( longvalue==0 && infop->base==8 ) flag_alternateform = 0;
#endif
        if( infop->flags & SXFLAG_SIGNED ){
          if( longvalue<0 ){ 
            longvalue = -longvalue;
			/* Ticket 1433-003 */
			if( longvalue < 0 ){
				/* Overflow */
				longvalue= 0x7FFFFFFFFFFFFFFF;
			}
            prefix = '-';
          }else if( flag_plussign )  prefix = '+';
          else if( flag_blanksign )  prefix = ' ';
          else                       prefix = 0;
        }else{
			if( longvalue<0 ){
				longvalue = -longvalue;
				/* Ticket 1433-003 */
				if( longvalue < 0 ){
					/* Overflow */
					longvalue= 0x7FFFFFFFFFFFFFFF;
				}
			}
			prefix = 0;
		}
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        bufpt = &buf[SXFMT_BUFSIZ-1];
        {
          register char *cset;      /* Use registers for speed */
          register int base;
          cset = infop->charset;
          base = infop->base;
          do{                                           /* Convert to ascii */
            *(--bufpt) = cset[longvalue%base];
            longvalue = longvalue/base;
          }while( longvalue>0 );
        }
        length = &buf[SXFMT_BUFSIZ-1]-bufpt;
        for(idx=precision-length; idx>0; idx--){
          *(--bufpt) = '0';                             /* Zero pad */
        }
        if( prefix ) *(--bufpt) = prefix;               /* Add sign */
        if( flag_alternateform && infop->prefix ){      /* Add "0" or "0x" */
          char *pre, x;
          pre = infop->prefix;
          if( *bufpt!=pre[0] ){
            for(pre=infop->prefix; (x=(*pre))!=0; pre++) *(--bufpt) = x;
          }
        }
        length = &buf[SXFMT_BUFSIZ-1]-bufpt;
        break;
      case SXFMT_FLOAT:
      case SXFMT_EXP:
      case SXFMT_GENERIC:
#ifndef SX_OMIT_FLOATINGPOINT
		realvalue = va_arg(ap,double);
        if( precision<0 ) precision = 6;         /* Set default precision */
        if( precision>SXFMT_BUFSIZ-40) precision = SXFMT_BUFSIZ-40;
        if( realvalue<0.0 ){
          realvalue = -realvalue;
          prefix = '-';
        }else{
          if( flag_plussign )          prefix = '+';
          else if( flag_blanksign )    prefix = ' ';
          else                         prefix = 0;
        }
        if( infop->type==SXFMT_GENERIC && precision>0 ) precision--;
        rounder = 0.0;
#if 0
        /* Rounding works like BSD when the constant 0.4999 is used.Wierd! */
        for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
#else
        /* It makes more sense to use 0.5 */
        for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1);
#endif
        if( infop->type==SXFMT_FLOAT ) realvalue += rounder;
        /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
        exp = 0;
        if( realvalue>0.0 ){
          while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
          while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
          while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; }
          while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; }
          if( exp>350 || exp<-350 ){
            bufpt = "NaN";
            length = 3;
            break;
          }
        }
        bufpt = buf;
        /*
        ** If the field type is etGENERIC, then convert to either etEXP
        ** or etFLOAT, as appropriate.
        */
        flag_exp = xtype==SXFMT_EXP;
        if( xtype!=SXFMT_FLOAT ){
          realvalue += rounder;
          if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
        }
        if( xtype==SXFMT_GENERIC ){
          flag_rtz = !flag_alternateform;
          if( exp<-4 || exp>precision ){
            xtype = SXFMT_EXP;
          }else{
            precision = precision - exp;
            xtype = SXFMT_FLOAT;
          }
        }else{
          flag_rtz = 0;
        }
        /*
        ** The "exp+precision" test causes output to be of type etEXP if
        ** the precision is too large to fit in buf[].
        */
        nsd = 0;
        if( xtype==SXFMT_FLOAT && exp+precision<SXFMT_BUFSIZ-30 ){
          flag_dp = (precision>0 || flag_alternateform);
          if( prefix ) *(bufpt++) = prefix;         /* Sign */
          if( exp<0 )  *(bufpt++) = '0';            /* Digits before "." */
          else for(; exp>=0; exp--) *(bufpt++) = (char)getdigit(&realvalue,&nsd);
          if( flag_dp ) *(bufpt++) = '.';           /* The decimal point */
          for(exp++; exp<0 && precision>0; precision--, exp++){
            *(bufpt++) = '0';
          }
          while( (precision--)>0 ) *(bufpt++) = (char)getdigit(&realvalue,&nsd);
          *(bufpt--) = 0;                           /* Null terminate */
          if( flag_rtz && flag_dp ){     /* Remove trailing zeros and "." */
            while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0;
            if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0;
          }
          bufpt++;                            /* point to next free slot */
        }else{    /* etEXP or etGENERIC */
          flag_dp = (precision>0 || flag_alternateform);
          if( prefix ) *(bufpt++) = prefix;   /* Sign */
          *(bufpt++) = (char)getdigit(&realvalue,&nsd);  /* First digit */
          if( flag_dp ) *(bufpt++) = '.';     /* Decimal point */
          while( (precision--)>0 ) *(bufpt++) = (char)getdigit(&realvalue,&nsd);
          bufpt--;                            /* point to last digit */
          if( flag_rtz && flag_dp ){          /* Remove tail zeros */
            while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0;
            if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0;
          }
          bufpt++;                            /* point to next free slot */
          if( exp || flag_exp ){
            *(bufpt++) = infop->charset[0];
            if( exp<0 ){ *(bufpt++) = '-'; exp = -exp; } /* sign of exp */
            else       { *(bufpt++) = '+'; }
            if( exp>=100 ){
              *(bufpt++) = (char)((exp/100)+'0');                /* 100's digit */
              exp %= 100;
            }
            *(bufpt++) = (char)(exp/10+'0');                     /* 10's digit */
            *(bufpt++) = (char)(exp%10+'0');                     /* 1's digit */
          }
        }
        /* The converted number is in buf[] and zero terminated.Output it.
        ** Note that the number is in the usual order, not reversed as with
        ** integer conversions.*/
        length = bufpt-buf;
        bufpt = buf;

        /* Special case:  Add leading zeros if the flag_zeropad flag is
        ** set and we are not left justified */
        if( flag_zeropad && !flag_leftjustify && length < width){
          int i;
          int nPad = width - length;
          for(i=width; i>=nPad; i--){
            bufpt[i] = bufpt[i-nPad];
          }
          i = prefix!=0;
          while( nPad-- ) bufpt[i++] = '0';
          length = width;
        }
#else
         bufpt = " ";
		 length = (int)sizeof(" ") - 1;
#endif /* SX_OMIT_FLOATINGPOINT */
        break;
      case SXFMT_SIZE:{
		 int *pSize = va_arg(ap,int *);
		 *pSize = ((SyFmtConsumer *)pUserData)->nLen;
		 length = width = 0;
					  }
        break;
      case SXFMT_PERCENT:
        buf[0] = '%';
        bufpt = buf;
        length = 1;
        break;
      case SXFMT_CHARX:
        c = va_arg(ap,int);
		buf[0] = (char)c;
		/* Limit the precision to prevent overflowing buf[] during conversion */
		if( precision>SXFMT_BUFSIZ-40 ) precision = SXFMT_BUFSIZ-40;
        if( precision>=0 ){
          for(idx=1; idx<precision; idx++) buf[idx] = (char)c;
          length = precision;
        }else{
          length =1;
        }
        bufpt = buf;
        break;
      case SXFMT_STRING:
        bufpt = va_arg(ap,char*);
        if( bufpt==0 ){
          bufpt = " ";
		  length = (int)sizeof(" ")-1;
		  break;
        }
		length = precision;
		if( precision < 0 ){
			/* Symisc extension */
			length = (int)SyStrlen(bufpt);
		}
        if( precision>=0 && precision<length ) length = precision;
        break;
	case SXFMT_RAWSTR:{
		/* Symisc extension */
		SyString *pStr = va_arg(ap,SyString *);
		if( pStr == 0 || pStr->zString == 0 ){
			 bufpt = " ";
		     length = (int)sizeof(char);
		     break;
		}
		bufpt = (char *)pStr->zString;
		length = (int)pStr->nByte;
		break;
					  }
      case SXFMT_ERROR:
        buf[0] = '?';
        bufpt = buf;
		length = (int)sizeof(char);
        if( c==0 ) zFormat--;
        break;
    }/* End switch over the format type */
    /*
    ** The text of the conversion is pointed to by "bufpt" and is
    ** "length" characters long.The field width is "width".Do
    ** the output.
    */
    if( !flag_leftjustify ){
      register int nspace;
      nspace = width-length;
      if( nspace>0 ){
        while( nspace>=etSPACESIZE ){
			rc = xConsumer(spaces,etSPACESIZE,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
			nspace -= etSPACESIZE;
        }
        if( nspace>0 ){
			rc = xConsumer(spaces,(unsigned int)nspace,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
		}
      }
    }
    if( length>0 ){
		rc = xConsumer(bufpt,(unsigned int)length,pUserData);
		if( rc != SXRET_OK ){
		  return SXERR_ABORT; /* Consumer routine request an operation abort */
		}
    }
    if( flag_leftjustify ){
      register int nspace;
      nspace = width-length;
      if( nspace>0 ){
        while( nspace>=etSPACESIZE ){
			rc = xConsumer(spaces,etSPACESIZE,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
			nspace -= etSPACESIZE;
        }
        if( nspace>0 ){
			rc = xConsumer(spaces,(unsigned int)nspace,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
		}
      }
    }
  }/* End for loop over the format string */
  return errorflag ? SXERR_FORMAT : SXRET_OK;
} 
static sxi32 FormatConsumer(const void *pSrc,unsigned int nLen,void *pData)
{
	SyFmtConsumer *pConsumer = (SyFmtConsumer *)pData;
	sxi32 rc = SXERR_ABORT;
	switch(pConsumer->nType){
	case SXFMT_CONS_PROC:
			/* User callback */
			rc = pConsumer->uConsumer.sFunc.xUserConsumer(pSrc,nLen,pConsumer->uConsumer.sFunc.pUserData);
			break;
	case SXFMT_CONS_BLOB:
			/* Blob consumer */
			rc = SyBlobAppend(pConsumer->uConsumer.pBlob,pSrc,(sxu32)nLen);
			break;
		default: 
			/* Unknown consumer */
			break;
	}
	/* Update total number of bytes consumed so far */
	pConsumer->nLen += nLen;
	pConsumer->rc = rc;
	return rc;	
}
static sxi32 FormatMount(sxi32 nType,void *pConsumer,ProcConsumer xUserCons,void *pUserData,sxu32 *pOutLen,const char *zFormat,va_list ap)
{
	SyFmtConsumer sCons;
	sCons.nType = nType;
	sCons.rc = SXRET_OK;
	sCons.nLen = 0;
	if( pOutLen ){
		*pOutLen = 0;
	}
	switch(nType){
	case SXFMT_CONS_PROC:
#if defined(UNTRUST)
			if( xUserCons == 0 ){
				return SXERR_EMPTY;
			}
#endif
			sCons.uConsumer.sFunc.xUserConsumer = xUserCons;
			sCons.uConsumer.sFunc.pUserData	    = pUserData;
		break;
		case SXFMT_CONS_BLOB:
			sCons.uConsumer.pBlob = (SyBlob *)pConsumer;
			break;
		default: 
			return SXERR_UNKNOWN;
	}
	InternFormat(FormatConsumer,&sCons,zFormat,ap); 
	if( pOutLen ){
		*pOutLen = sCons.nLen;
	}
	return sCons.rc;
}
PH7_PRIVATE sxi32 SyProcFormat(ProcConsumer xConsumer,void *pData,const char *zFormat,...)
{
	va_list ap;
	sxi32 rc;
#if defined(UNTRUST)	
	if( SX_EMPTY_STR(zFormat) ){
		return SXERR_EMPTY;
	}
#endif
	va_start(ap,zFormat);
	rc = FormatMount(SXFMT_CONS_PROC,0,xConsumer,pData,0,zFormat,ap);
	va_end(ap);
	return rc;
}
PH7_PRIVATE sxu32 SyBlobFormat(SyBlob *pBlob,const char *zFormat,...)
{
	va_list ap;
	sxu32 n;
#if defined(UNTRUST)	
	if( SX_EMPTY_STR(zFormat) ){
		return 0;
	}
#endif			
	va_start(ap,zFormat);
	FormatMount(SXFMT_CONS_BLOB,&(*pBlob),0,0,&n,zFormat,ap);
	va_end(ap);
	return n;
}
PH7_PRIVATE sxu32 SyBlobFormatAp(SyBlob *pBlob,const char *zFormat,va_list ap)
{
	sxu32 n = 0; /* cc warning */
#if defined(UNTRUST)	
	if( SX_EMPTY_STR(zFormat) ){
		return 0;
	}
#endif	
	FormatMount(SXFMT_CONS_BLOB,&(*pBlob),0,0,&n,zFormat,ap);
	return n;
}
PH7_PRIVATE sxu32 SyBufferFormat(char *zBuf,sxu32 nLen,const char *zFormat,...)
{
	SyBlob sBlob;
	va_list ap;
	sxu32 n;
#if defined(UNTRUST)	
	if( SX_EMPTY_STR(zFormat) ){
		return 0;
	}
#endif	
	if( SXRET_OK != SyBlobInitFromBuf(&sBlob,zBuf,nLen - 1) ){
		return 0;
	}		
	va_start(ap,zFormat);
	FormatMount(SXFMT_CONS_BLOB,&sBlob,0,0,0,zFormat,ap);
	va_end(ap);
	n = SyBlobLength(&sBlob);
	/* Append the null terminator */
	sBlob.mByte++;
	SyBlobAppend(&sBlob,"\0",sizeof(char));
	return n;
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
/*
* Symisc XML Parser Engine (UTF-8) SAX(Event Driven) API
* @author Mrad Chems Eddine <chm@symisc.net>
* @started 08/03/2010 21:32 FreeBSD
* @finished	07/04/2010 23:24 Win32[VS8]
*/
/* 
 * An XML raw text,CDATA,tag name is parsed out and stored
 * in an instance of the following structure.
 */
typedef struct SyXMLRawStrNS SyXMLRawStrNS; 
struct SyXMLRawStrNS
{	
	/* Public field [Must match the SyXMLRawStr fields ] */
	const char *zString; /* Raw text [UTF-8 ENCODED EXCEPT CDATA] [NOT NULL TERMINATED] */
	sxu32 nByte; /* Text length */
	sxu32 nLine; /* Line number this text occurs */
	/* Private fields */
	SySet sNSset; /* Namespace entries */
};
/*
 * Lexer token codes
 * The following set of constants are the token value recognized 
 * by the lexer when processing XML input.
 */
#define SXML_TOK_INVALID	0xFFFF /* Invalid Token */
#define SXML_TOK_COMMENT	0x01   /* Comment */
#define SXML_TOK_PI	        0x02   /* Processing instruction */
#define SXML_TOK_DOCTYPE	0x04   /* Doctype directive */
#define SXML_TOK_RAW		0x08   /* Raw text */
#define SXML_TOK_START_TAG	0x10   /* Starting tag */
#define SXML_TOK_CDATA		0x20   /* CDATA */
#define SXML_TOK_END_TAG	0x40   /* Ending tag */
#define SXML_TOK_START_END	0x80   /* Tag */
#define SXML_TOK_SPACE		0x100  /* Spaces (including new lines) */
#define IS_XML_DIRTY(c) \
	( c == '<' || c == '$'|| c == '"' || c == '\''|| c == '&'|| c == '(' || c == ')' || c == '*' ||\
	c == '%'  || c == '#' || c == '|' || c == '/'|| c == '~' || c == '{' || c == '}' ||\
	c == '['  || c == ']' || c == '\\'|| c == ';'||c == '^'  || c == '`' )
/* Tokenize an entire XML input */
static sxi32 XML_Tokenize(SyStream *pStream,SyToken *pToken,void *pUserData,void *pUnused2)
{
	SyXMLParser *pParse = (SyXMLParser *)pUserData;
	SyString *pStr;
	sxi32 rc;
	int c;
	/* Jump leading white spaces */
	while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisSpace(pStream->zText[0]) ){
		/* Advance the stream cursor */
		if( pStream->zText[0] == '\n' ){
			/* Increment line counter */
			pStream->nLine++;
		}
		pStream->zText++;
	}
	if( pStream->zText >= pStream->zEnd ){
		SXUNUSED(pUnused2);
		/* End of input reached */
		return SXERR_EOF;
	}
	/* Record token starting position and line */
	pToken->nLine = pStream->nLine;
	pToken->pUserData = 0;
	pStr = &pToken->sData;
	SyStringInitFromBuf(pStr,pStream->zText,0);
	/* Extract the current token */
	c = pStream->zText[0];
	if( c == '<' ){
		pStream->zText++;
		pStr->zString++;
		if( pStream->zText >= pStream->zEnd ){
			if( pParse->xError ){
				rc = pParse->xError("Illegal syntax,expecting valid start name character",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			/* End of input reached */
			return SXERR_EOF;
		}
		c = pStream->zText[0];
		if( c == '?' ){
			/* Processing instruction */
			pStream->zText++;
			pStr->zString++;
			pToken->nType = SXML_TOK_PI;
			while( XLEX_IN_LEN(pStream) >= sizeof("?>")-1 &&
				SyMemcmp((const void *)pStream->zText,"?>",sizeof("?>")-1) != 0 ){
					if( pStream->zText[0] == '\n' ){
						/* Increment line counter */
						pStream->nLine++;
					}
					pStream->zText++;
			}
			/* Record token length */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
			if( XLEX_IN_LEN(pStream) < sizeof("?>")-1 ){
				if( pParse->xError ){
					rc = pParse->xError("End of input found,but processing instruction was not found",SXML_ERROR_UNCLOSED_TOKEN,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				return SXERR_EOF;
			}
			pStream->zText += sizeof("?>")-1;
		}else if( c == '!' ){
			pStream->zText++;
			if( XLEX_IN_LEN(pStream) >= sizeof("--")-1 && pStream->zText[0] == '-' && pStream->zText[1] == '-' ){
				/* Comment */
				pStream->zText += sizeof("--") - 1;
				while( XLEX_IN_LEN(pStream) >= sizeof("-->")-1 &&
					SyMemcmp((const void *)pStream->zText,"-->",sizeof("-->")-1) != 0 ){
						if( pStream->zText[0] == '\n' ){
							/* Increment line counter */
							pStream->nLine++;
						}
						pStream->zText++;
				}
				pStream->zText += sizeof("-->")-1;
				/* Tell the lexer to ignore this token */
				return SXERR_CONTINUE;
			}
			if( XLEX_IN_LEN(pStream) >= sizeof("[CDATA[") - 1 && SyMemcmp((const void *)pStream->zText,"[CDATA[",sizeof("[CDATA[")-1) == 0 ){
				/* CDATA */
				pStream->zText += sizeof("[CDATA[") - 1;
				pStr->zString = (const char *)pStream->zText;
				while( XLEX_IN_LEN(pStream) >= sizeof("]]>")-1 &&
					SyMemcmp((const void *)pStream->zText,"]]>",sizeof("]]>")-1) != 0 ){
						if( pStream->zText[0] == '\n' ){
							/* Increment line counter */
							pStream->nLine++;
						}
						pStream->zText++;
				}
				/* Record token type and length */
				pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
				pToken->nType = SXML_TOK_CDATA;
				if( XLEX_IN_LEN(pStream) < sizeof("]]>")-1 ){
					if( pParse->xError ){
						rc = pParse->xError("End of input found,but ]]> was not found",SXML_ERROR_UNCLOSED_TOKEN,pToken,pParse->pUserData);
						if( rc == SXERR_ABORT ){
							return SXERR_ABORT;
						}
					}
					return SXERR_EOF;
				}
				pStream->zText += sizeof("]]>")-1;
				return SXRET_OK;
			}
			if( XLEX_IN_LEN(pStream) >= sizeof("DOCTYPE") - 1 && SyMemcmp((const void *)pStream->zText,"DOCTYPE",sizeof("DOCTYPE")-1) == 0 ){
				SyString sDelim = { ">" , sizeof(char) }; /* Default delimiter */
				int c = 0;
				/* DOCTYPE */
				pStream->zText += sizeof("DOCTYPE") - 1;
				pStr->zString = (const char *)pStream->zText;
				/* Check for element declaration */
				while( pStream->zText < pStream->zEnd && pStream->zText[0] != '\n' ){
					if( pStream->zText[0] >= 0xc0 || !SyisSpace(pStream->zText[0]) ){
						c = pStream->zText[0];
						if( c == '>' ){
							break;
						}
					}
					pStream->zText++;
				}
				if( c == '[' ){
					/* Change the delimiter */
					SyStringInitFromBuf(&sDelim,"]>",sizeof("]>")-1);
				}
				if( c != '>' ){
					while( XLEX_IN_LEN(pStream) >= sDelim.nByte &&
						SyMemcmp((const void *)pStream->zText,sDelim.zString,sDelim.nByte) != 0 ){
							if( pStream->zText[0] == '\n' ){
								/* Increment line counter */
								pStream->nLine++;
							}
							pStream->zText++;
					}
				}
				/* Record token type and length */
				pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
				pToken->nType = SXML_TOK_DOCTYPE;
				if( XLEX_IN_LEN(pStream) < sDelim.nByte ){
					if( pParse->xError ){
						rc = pParse->xError("End of input found,but ]> or > was not found",SXML_ERROR_UNCLOSED_TOKEN,pToken,pParse->pUserData);
						if( rc == SXERR_ABORT ){
							return SXERR_ABORT;
						}
					}
					return SXERR_EOF;
				}
				pStream->zText += sDelim.nByte;
				return SXRET_OK;
			}
		}else{
			int c;
			c = pStream->zText[0];
			rc = SXRET_OK;
			pToken->nType = SXML_TOK_START_TAG;
			if( c == '/' ){
				/* End tag */
				pToken->nType = SXML_TOK_END_TAG;
				pStream->zText++;
				pStr->zString++;
				if( pStream->zText >= pStream->zEnd ){
					if( pParse->xError ){
						rc = pParse->xError("Illegal syntax,expecting valid start name character",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
						if( rc == SXERR_ABORT ){
							return SXERR_ABORT;
						}
					}
					return SXERR_EOF;
				}
				c = pStream->zText[0];
			}
			if( c == '>' ){
				/*<>*/
				if( pParse->xError ){
					rc = pParse->xError("Illegal syntax,expecting valid start name character",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				/* Ignore the token */
				return SXERR_CONTINUE;
			}
			if( c < 0xc0 && (SyisSpace(c) || SyisDigit(c) || c == '.' || c == '-' ||IS_XML_DIRTY(c) ) ){
				if( pParse->xError ){
					rc = pParse->xError("Illegal syntax,expecting valid start name character",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				rc = SXERR_INVALID;
			}
			pStream->zText++;
			/* Delimit the tag */
			while( pStream->zText < pStream->zEnd && pStream->zText[0] != '>' ){
				c = pStream->zText[0];
				if( c >= 0xc0 ){
					/* UTF-8 stream */
					pStream->zText++;
					SX_JMP_UTF8(pStream->zText,pStream->zEnd);
				}else{
					if( c == '/' && &pStream->zText[1] < pStream->zEnd && pStream->zText[1] == '>' ){
						pStream->zText++;
						if( pToken->nType != SXML_TOK_START_TAG ){
							if( pParse->xError ){
								rc = pParse->xError("Unexpected closing tag,expecting '>'",
									SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
								if( rc == SXERR_ABORT ){
									return SXERR_ABORT;
								}
							}
							/* Ignore the token */
							rc = SXERR_INVALID;
						}else{
							pToken->nType = SXML_TOK_START_END;
						}
						break;
					}
					if( pStream->zText[0] == '\n' ){
						/* Increment line counter */
						pStream->nLine++;
					}
					/* Advance the stream cursor */
					pStream->zText++;
				}
			}
			if( rc != SXRET_OK ){
				/* Tell the lexer to ignore this token */
				return SXERR_CONTINUE;
			}
			/* Record token length */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
			if( pToken->nType == SXML_TOK_START_END && pStr->nByte > 0){
				pStr->nByte -= sizeof(char);
			}
			if ( pStream->zText < pStream->zEnd ){
				pStream->zText++;
			}else{
				if( pParse->xError ){
					rc = pParse->xError("End of input found,but closing tag '>' was not found",SXML_ERROR_UNCLOSED_TOKEN,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
			}
		}
	}else{
		/* Raw input */
		while( pStream->zText < pStream->zEnd ){
			c = pStream->zText[0];
			if( c < 0xc0 ){
				if( c == '<' ){
					break;
				}else if( c == '\n' ){
					/* Increment line counter */
					pStream->nLine++;
				}
				/* Advance the stream cursor */
				pStream->zText++;
			}else{
				/* UTF-8 stream */
				pStream->zText++;
				SX_JMP_UTF8(pStream->zText,pStream->zEnd);
			}
		}
		/* Record token type,length */
		pToken->nType = SXML_TOK_RAW;
		pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
	}
	/* Return to the lexer */
	return SXRET_OK;
}
static int XMLCheckDuplicateAttr(SyXMLRawStr *aSet,sxu32 nEntry,SyXMLRawStr *pEntry)
{
	sxu32 n;
	for( n = 0 ; n < nEntry ; n += 2 ){
		SyXMLRawStr *pAttr = &aSet[n];
		if( pAttr->nByte == pEntry->nByte && SyMemcmp(pAttr->zString,pEntry->zString,pEntry->nByte) == 0 ){
			/* Attribute found */
			return 1;
		}
	}
	/* No duplicates */
	return 0;
}
static sxi32 XMLProcessNamesSpace(SyXMLParser *pParse,SyXMLRawStrNS *pTag,SyToken *pToken,SySet *pAttr)
{
	SyXMLRawStr *pPrefix,*pUri; /* Namespace prefix/URI */
	SyHashEntry *pEntry;
	SyXMLRawStr *pDup;
	sxi32 rc;
	/* Extract the URI first */
	pUri = (SyXMLRawStr *)SySetPeek(pAttr);
	/* Extract the prefix */
	pPrefix =  (SyXMLRawStr *)SySetAt(pAttr,SySetUsed(pAttr) - 2);
	/* Prefix name */
	if( pPrefix->nByte == sizeof("xmlns")-1 ){
		/* Default namespace */
		pPrefix->nByte = 0;
		pPrefix->zString = ""; /* Empty string */
	}else{
		pPrefix->nByte   -= sizeof("xmlns")-1; 
		pPrefix->zString += sizeof("xmlns")-1;
		if( pPrefix->zString[0] != ':' ){
			return SXRET_OK;
		}
		pPrefix->nByte--;
		pPrefix->zString++;
		if( pPrefix->nByte < 1 ){
			if( pParse->xError ){
				rc = pParse->xError("Invalid namespace name",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			/* POP the last insertred two entries */
			(void)SySetPop(pAttr);
			(void)SySetPop(pAttr);
			return SXERR_SYNTAX;
		}
	}
	/* Invoke the namespace callback if available */
	if( pParse->xNameSpace ){
		rc = pParse->xNameSpace(pPrefix,pUri,pParse->pUserData);
		if( rc == SXERR_ABORT ){
			/* User callback request an operation abort */
			return SXERR_ABORT;
		}
	}
	/* Duplicate structure */
	pDup = (SyXMLRawStr *)SyMemBackendAlloc(pParse->pAllocator,sizeof(SyXMLRawStr));
	if( pDup == 0 ){
		if( pParse->xError ){
			pParse->xError("Out of memory",SXML_ERROR_NO_MEMORY,pToken,pParse->pUserData);
		}
		/* Abort processing immediately */
		return SXERR_ABORT;
	}
	*pDup = *pUri; /* Structure assignement */
	/* Save the namespace */
	if( pPrefix->nByte == 0 ){
		pPrefix->zString = "Default";
		pPrefix->nByte = sizeof("Default")-1;
	}
	SyHashInsert(&pParse->hns,(const void *)pPrefix->zString,pPrefix->nByte,pDup);
	/* Peek the last inserted entry */
	pEntry = SyHashLastEntry(&pParse->hns);
	/* Store in the corresponding tag container*/
	SySetPut(&pTag->sNSset,(const void *)&pEntry);
	/* POP the last insertred two entries */
	(void)SySetPop(pAttr);
	(void)SySetPop(pAttr);
	return SXRET_OK;
}
static sxi32 XMLProcessStartTag(SyXMLParser *pParse,SyToken *pToken,SyXMLRawStrNS *pTag,SySet  *pAttrSet,SySet *pTagStack)
{
	SyString *pIn = &pToken->sData;
	const char *zIn,*zCur,*zEnd;
	SyXMLRawStr sEntry;
	sxi32 rc;
	int c;
	/* Reset the working set */
	SySetReset(pAttrSet);
	/* Delimit the raw tag */
	zIn = pIn->zString;
	zEnd = &zIn[pIn->nByte];
	while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		zIn++;
	}
	/* Isolate tag name */
	sEntry.nLine = pTag->nLine = pToken->nLine;
	zCur = zIn;
	while( zIn < zEnd ){
		if( (unsigned char)zIn[0] >= 0xc0 ){
			/* UTF-8 stream */
			zIn++;
			SX_JMP_UTF8(zIn,zEnd);
		}else if( SyisSpace(zIn[0])){
			break;
		}else{
			if( IS_XML_DIRTY(zIn[0]) ){
				if( pParse->xError ){
					rc = pParse->xError("Illegal character in XML name",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
			}
			zIn++;
		}
	}
	if( zCur >= zIn ){
		if( pParse->xError ){
			rc = pParse->xError("Invalid XML name",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		return SXERR_SYNTAX;
	}
	pTag->zString = zCur;
	pTag->nByte = (sxu32)(zIn-zCur);
	/* Process tag attribute */
	for(;;){
		int is_ns = 0;
		while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
			zIn++;
		}
		if( zIn >= zEnd ){
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '=' ){
			if( (unsigned char)zIn[0] >= 0xc0 ){
				/* UTF-8 stream */
				zIn++;
				SX_JMP_UTF8(zIn,zEnd);
			}else if( SyisSpace(zIn[0]) ){
				break;
			}else{
				zIn++;
			}
		}
		if( zCur >= zIn ){
			if( pParse->xError ){
				rc = pParse->xError("Missing attribute name",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			return SXERR_SYNTAX;
		}
		/* Store attribute name */
		sEntry.zString = zCur;
		sEntry.nByte = (sxu32)(zIn-zCur);
		if( (pParse->nFlags & SXML_ENABLE_NAMESPACE) && sEntry.nByte >= sizeof("xmlns") - 1 &&
			SyMemcmp(sEntry.zString,"xmlns",sizeof("xmlns") - 1) == 0 ){
				is_ns = 1;
		}
		while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
			zIn++;
		}
		if( zIn >= zEnd || zIn[0] != '=' ){
			if( pParse->xError ){
				rc = pParse->xError("Missing attribute value",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			return SXERR_SYNTAX;
		}
		while( sEntry.nByte > 0 && (unsigned char)zCur[sEntry.nByte - 1] < 0xc0 
			&& SyisSpace(zCur[sEntry.nByte - 1])){
				sEntry.nByte--;
		}
		/* Check for duplicates first */
		if( XMLCheckDuplicateAttr((SyXMLRawStr *)SySetBasePtr(pAttrSet),SySetUsed(pAttrSet),&sEntry) ){
			if( pParse->xError ){
				rc = pParse->xError("Duplicate attribute",SXML_ERROR_DUPLICATE_ATTRIBUTE,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			return SXERR_SYNTAX;
		}
		if( SXRET_OK != SySetPut(pAttrSet,(const void *)&sEntry) ){
			return SXERR_ABORT;
		}
		/* Extract attribute value */
		zIn++; /* Jump the trailing '=' */
		while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
			zIn++;
		}
		if( zIn >= zEnd ){
			if( pParse->xError ){
				rc = pParse->xError("Missing attribute value",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			(void)SySetPop(pAttrSet);
			return SXERR_SYNTAX;
		}
		if( zIn[0] != '\'' && zIn[0] != '"' ){
			if( pParse->xError ){
				rc = pParse->xError("Missing quotes on attribute value",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			(void)SySetPop(pAttrSet);
			return SXERR_SYNTAX;
		}
		c = zIn[0];
		zIn++;
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != c ){
			zIn++;
		}
		if( zIn >= zEnd ){
			if( pParse->xError ){
				rc = pParse->xError("Missing quotes on attribute value",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			(void)SySetPop(pAttrSet);
			return SXERR_SYNTAX;
		}
		/* Store attribute value */
		sEntry.zString = zCur;
		sEntry.nByte = (sxu32)(zIn-zCur);
		if( SXRET_OK != SySetPut(pAttrSet,(const void *)&sEntry) ){
			return SXERR_ABORT;
		}
		zIn++;
		if( is_ns ){
			/* Process namespace declaration */
			XMLProcessNamesSpace(pParse,pTag,pToken,pAttrSet);
		}
	}
	/* Store in the tag stack */
	if( pToken->nType == SXML_TOK_START_TAG ){
		rc = SySetPut(pTagStack,(const void *)pTag);
	}
	return SXRET_OK;
}
static void XMLExtactPI(SyToken *pToken,SyXMLRawStr *pTarget,SyXMLRawStr *pData,int *pXML)
{
	SyString *pIn = &pToken->sData;
	const char *zIn,*zCur,*zEnd;
	
	pTarget->nLine = pData->nLine = pToken->nLine;
	/* Nullify the entries first */
	pTarget->zString = pData->zString = 0;
	/* Ignore leading and traing white spaces */
	SyStringFullTrim(pIn);
	/* Delimit the raw PI */
	zIn  = pIn->zString;
	zEnd = &zIn[pIn->nByte];
	if( pXML ){
		*pXML = 0;
	}
	/* Extract the target */
	zCur = zIn;
	while( zIn < zEnd ){
		if( (unsigned char)zIn[0] >= 0xc0 ){
			/* UTF-8 stream */
			zIn++;
			SX_JMP_UTF8(zIn,zEnd);
		}else if( SyisSpace(zIn[0])){
			break;
		}else{
			zIn++;
		}
	}
	if( zIn > zCur ){
		pTarget->zString = zCur;
		pTarget->nByte = (sxu32)(zIn-zCur);
		if( pXML && pTarget->nByte == sizeof("xml")-1 && SyStrnicmp(pTarget->zString,"xml",sizeof("xml")-1) == 0 ){
			*pXML = 1;
		}
	}
	/* Extract the PI data  */
	while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		zIn++;
	}
	if( zIn < zEnd ){
		pData->zString = zIn;
		pData->nByte = (sxu32)(zEnd-zIn);
	}
}
static sxi32 XMLExtractEndTag(SyXMLParser *pParse,SyToken *pToken,SyXMLRawStrNS *pOut)
{
	SyString *pIn = &pToken->sData;
	const char *zEnd = &pIn->zString[pIn->nByte];
	const char *zIn = pIn->zString;
	/* Ignore leading white spaces */
	while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		zIn++;
	}
	pOut->nLine = pToken->nLine;
	pOut->zString = zIn;
	pOut->nByte = (sxu32)(zEnd-zIn);
	/* Ignore trailing white spaces */
	while( pOut->nByte > 0 && (unsigned char)pOut->zString[pOut->nByte - 1] < 0xc0
		&& SyisSpace(pOut->zString[pOut->nByte - 1]) ){
			pOut->nByte--;
	}
	if( pOut->nByte < 1 ){
		if( pParse->xError ){
			sxi32 rc;
			rc  = pParse->xError("Invalid end tag name",SXML_ERROR_INVALID_TOKEN,pToken,pParse->pUserData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		return SXERR_SYNTAX;
	}
	return SXRET_OK;
}
static void TokenToXMLString(SyToken *pTok,SyXMLRawStrNS *pOut)
{
	/* Remove leading and trailing white spaces first */
	SyStringFullTrim(&pTok->sData);
	pOut->zString = SyStringData(&pTok->sData); 
	pOut->nByte = SyStringLength(&pTok->sData);
}
static sxi32 XMLExtractNS(SyXMLParser *pParse,SyToken *pToken,SyXMLRawStrNS *pTag,SyXMLRawStr *pnsUri)
{
	SyXMLRawStr *pUri,sPrefix;
	SyHashEntry *pEntry;
	sxu32 nOfft;
	sxi32 rc;
	/* Extract a prefix if available */
	rc = SyByteFind(pTag->zString,pTag->nByte,':',&nOfft);
	if( rc != SXRET_OK ){
		/* Check if there is a default namespace */
		pEntry = SyHashGet(&pParse->hns,"Default",sizeof("Default")-1);
		if( pEntry  ){
			/* Extract the ns URI */
			pUri = (SyXMLRawStr *)pEntry->pUserData;
			/* Save the ns URI */
			pnsUri->zString = pUri->zString;
			pnsUri->nByte = pUri->nByte;
		}
		return SXRET_OK;
	}
	if( nOfft < 1 ){
		if( pParse->xError ){
			rc = pParse->xError("Empty prefix is not allowed according to XML namespace specification",
				SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		return SXERR_SYNTAX;
	}
	sPrefix.zString = pTag->zString;
	sPrefix.nByte = nOfft;
	sPrefix.nLine = pTag->nLine;
	pTag->zString += nOfft + 1;
	pTag->nByte -= nOfft;
	if( pTag->nByte < 1 ){
		if( pParse->xError ){
			rc = pParse->xError("Missing tag name",SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		return SXERR_SYNTAX;
	}
	/* Check if the prefix is already registered */
	pEntry = SyHashGet(&pParse->hns,sPrefix.zString,sPrefix.nByte);
	if( pEntry == 0 ){
		if( pParse->xError ){
			rc = pParse->xError("Namespace prefix is not defined",SXML_ERROR_SYNTAX,
				pToken,pParse->pUserData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		return SXERR_SYNTAX;
	}
	/* Extract the ns URI */
	pUri = (SyXMLRawStr *)pEntry->pUserData;
	/* Save the ns URI */
	pnsUri->zString = pUri->zString;
	pnsUri->nByte = pUri->nByte;
	/* All done */
	return SXRET_OK;
}
static sxi32 XMLnsUnlink(SyXMLParser *pParse,SyXMLRawStrNS *pLast,SyToken *pToken)
{
	SyHashEntry **apEntry,*pEntry;
	void *pUserData;
	sxu32 n;
	/* Release namespace entries */
	apEntry = (SyHashEntry **)SySetBasePtr(&pLast->sNSset);
	for( n = 0 ; n < SySetUsed(&pLast->sNSset) ; ++n ){
		pEntry = apEntry[n];
		/* Invoke the end namespace declaration callback */
		if( pParse->xNameSpaceEnd && (pParse->nFlags & SXML_ENABLE_NAMESPACE) && pToken ){
			SyXMLRawStr sPrefix;
			sxi32 rc;
			sPrefix.zString = (const char *)pEntry->pKey;
			sPrefix.nByte = pEntry->nKeyLen;
			sPrefix.nLine = pToken->nLine;
			rc = pParse->xNameSpaceEnd(&sPrefix,pParse->pUserData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		pUserData = pEntry->pUserData;
		/* Remove from the namespace hashtable */
		SyHashDeleteEntry2(pEntry);
		SyMemBackendFree(pParse->pAllocator,pUserData);
	}
	SySetRelease(&pLast->sNSset);
	return SXRET_OK;
}
/* Process XML tokens */
static sxi32  ProcessXML(SyXMLParser *pParse,SySet *pTagStack,SySet *pWorker)	
{
	SySet *pTokenSet = &pParse->sToken;
	SyXMLRawStrNS sEntry;
	SyXMLRawStr sNs;
	SyToken *pToken;
	int bGotTag;
	sxi32 rc;
	/* Initialize fields */
	bGotTag = 0;
	/* Start processing */		
	if( pParse->xStartDoc && (SXERR_ABORT == pParse->xStartDoc(pParse->pUserData)) ){
		/* User callback request an operation abort */
		return SXERR_ABORT;
	}
	/* Reset the loop cursor */
	SySetResetCursor(pTokenSet);
	/* Extract the current token */
	while( SXRET_OK == (SySetGetNextEntry(&(*pTokenSet),(void **)&pToken)) ){
		SyZero(&sEntry,sizeof(SyXMLRawStrNS));
		SyZero(&sNs,sizeof(SyXMLRawStr));
		SySetInit(&sEntry.sNSset,pParse->pAllocator,sizeof(SyHashEntry *));
		sEntry.nLine = sNs.nLine = pToken->nLine;
		switch(pToken->nType){
		case SXML_TOK_DOCTYPE:
			if( SySetUsed(pTagStack) > 1 || bGotTag ){
				if( pParse->xError ){
					rc = pParse->xError("DOCTYPE must be declared first",SXML_ERROR_MISPLACED_XML_PI,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				break;
			}
			/* Invoke the supplied callback if any */
			if( pParse->xDoctype ){
				TokenToXMLString(pToken,&sEntry);
				rc = pParse->xDoctype((SyXMLRawStr *)&sEntry,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			break;
		case SXML_TOK_CDATA:
			if( SySetUsed(pTagStack) < 1 ){
				if( pParse->xError ){
					rc = pParse->xError("CDATA without matching tag",SXML_ERROR_TAG_MISMATCH,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
			}
			/* Invoke the supplied callback if any */
			if( pParse->xRaw ){
				TokenToXMLString(pToken,&sEntry);
				rc = pParse->xRaw((SyXMLRawStr *)&sEntry,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			break;
		case SXML_TOK_PI:{
			SyXMLRawStr sTarget,sData;
			int isXML = 0;
			/* Extract the target and data */
			XMLExtactPI(pToken,&sTarget,&sData,&isXML);
			if( isXML && SySetCursor(pTokenSet) - 1 > 0 ){
				if( pParse->xError ){
					rc = pParse->xError("Unexpected XML declaration. The XML declaration must be the first node in the document",
						SXML_ERROR_MISPLACED_XML_PI,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
			}else if( pParse->xPi ){
				/* Invoke the supplied callback*/
				rc = pParse->xPi(&sTarget,&sData,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}						 
			break;
						 }
		case SXML_TOK_RAW:
			if( SySetUsed(pTagStack) < 1 ){
				if( pParse->xError ){
					rc = pParse->xError("Text (Raw data) without matching tag",SXML_ERROR_TAG_MISMATCH,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				break;
			}
			/* Invoke the supplied callback if any */
			if( pParse->xRaw ){
				TokenToXMLString(pToken,&sEntry);
				rc = pParse->xRaw((SyXMLRawStr *)&sEntry,pParse->pUserData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			break;
		case SXML_TOK_END_TAG:{
			SyXMLRawStrNS *pLast = 0; /* cc warning */
			if( SySetUsed(pTagStack) < 1 ){
				if( pParse->xError ){
					rc = pParse->xError("Unexpected closing tag",SXML_ERROR_TAG_MISMATCH,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				break;
			}
			rc = XMLExtractEndTag(pParse,pToken,&sEntry);
			if( rc == SXRET_OK ){
				/* Extract the last inserted entry */
				pLast = (SyXMLRawStrNS *)SySetPeek(pTagStack);
				if( pLast == 0 || pLast->nByte != sEntry.nByte ||
					SyMemcmp(pLast->zString,sEntry.zString,sEntry.nByte) != 0 ){
						if( pParse->xError ){
							rc = pParse->xError("Unexpected closing tag",SXML_ERROR_TAG_MISMATCH,pToken,pParse->pUserData);
							if( rc == SXERR_ABORT ){
								return SXERR_ABORT;
							}
						}
				}else{
					/* Invoke the supllied callback if any */
					if( pParse->xEndTag ){
						rc = SXRET_OK;
						if( pParse->nFlags & SXML_ENABLE_NAMESPACE ){
							/* Extract namespace URI */
							rc = XMLExtractNS(pParse,pToken,&sEntry,&sNs);
							if( rc == SXERR_ABORT ){
								return SXERR_ABORT;
							}
						}
						if( rc == SXRET_OK ){
							rc = pParse->xEndTag((SyXMLRawStr *)&sEntry,&sNs,pParse->pUserData);
							if( rc == SXERR_ABORT ){
								return SXERR_ABORT;
							}
						}
					}
				}
			}else if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			if( pLast ){
				rc = XMLnsUnlink(pParse,pLast,pToken);
				(void)SySetPop(pTagStack);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			break;							  
							  }
		case SXML_TOK_START_TAG:
		case SXML_TOK_START_END:
			if( SySetUsed(pTagStack) < 1 && bGotTag ){
				if( pParse->xError ){
					rc = pParse->xError("XML document cannot contain multiple root level elements documents",
						SXML_ERROR_SYNTAX,pToken,pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				break;
			}
			bGotTag = 1;
			/* Extract the tag and it's supplied attribute */
			rc = XMLProcessStartTag(pParse,pToken,&sEntry,pWorker,pTagStack);
			if( rc == SXRET_OK ){
				if( pParse->nFlags & SXML_ENABLE_NAMESPACE ){
					/* Extract namespace URI */
					rc = XMLExtractNS(pParse,pToken,&sEntry,&sNs);
				}
			}
			if( rc == SXRET_OK ){
				/* Invoke the supplied callback */
				if( pParse->xStartTag ){
					rc = pParse->xStartTag((SyXMLRawStr *)&sEntry,&sNs,SySetUsed(pWorker),
						(SyXMLRawStr *)SySetBasePtr(pWorker),pParse->pUserData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				if( pToken->nType == SXML_TOK_START_END ){
					if ( pParse->xEndTag ){
						rc = pParse->xEndTag((SyXMLRawStr *)&sEntry,&sNs,pParse->pUserData);
						if( rc == SXERR_ABORT ){
							return SXERR_ABORT;
						}
					}
					rc = XMLnsUnlink(pParse,&sEntry,pToken);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
			}else if( rc == SXERR_ABORT ){
				/* Abort processing immediately */
				return SXERR_ABORT;
			}
			break;
		default:
			/* Can't happen */
			break;
		}
	}
	if( SySetUsed(pTagStack) > 0 && pParse->xError){
		pParse->xError("Missing closing tag",SXML_ERROR_SYNTAX,
			(SyToken *)SySetPeek(&pParse->sToken),pParse->pUserData);
	}
	if( pParse->xEndDoc ){
		pParse->xEndDoc(pParse->pUserData);
	}
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyXMLParserInit(SyXMLParser *pParser,SyMemBackend *pAllocator,sxi32 iFlags)
{
	/* Zero the structure first */
	SyZero(pParser,sizeof(SyXMLParser));
	/* Initilaize fields */
	SySetInit(&pParser->sToken,pAllocator,sizeof(SyToken));
	SyLexInit(&pParser->sLex,&pParser->sToken,XML_Tokenize,pParser);
	SyHashInit(&pParser->hns,pAllocator,0,0);
	pParser->pAllocator = pAllocator;
	pParser->nFlags = iFlags;
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyXMLParserSetEventHandler(SyXMLParser *pParser,
	void *pUserData,
	ProcXMLStartTagHandler xStartTag,
	ProcXMLTextHandler xRaw,
	ProcXMLSyntaxErrorHandler xErr,
	ProcXMLStartDocument xStartDoc,
	ProcXMLEndTagHandler xEndTag,
	ProcXMLPIHandler   xPi,
	ProcXMLEndDocument xEndDoc,
	ProcXMLDoctypeHandler xDoctype,
	ProcXMLNameSpaceStart xNameSpace,
	ProcXMLNameSpaceEnd   xNameSpaceEnd
	){
	/* Install user callbacks */
	if( xErr ){
		pParser->xError = xErr;
	}
	if( xStartDoc ){
		pParser->xStartDoc = xStartDoc;
	}
	if( xStartTag ){
		pParser->xStartTag = xStartTag;
	}
	if( xRaw ){
		pParser->xRaw = xRaw;
	}
	if( xEndTag ){
		pParser->xEndTag = xEndTag;
	}
	if( xPi ){
		pParser->xPi = xPi;
	}
	if( xEndDoc ){
		pParser->xEndDoc = xEndDoc;
	}
	if( xDoctype ){
		pParser->xDoctype = xDoctype;
	}
	if( xNameSpace ){
		pParser->xNameSpace	= xNameSpace;
	}
	if( xNameSpaceEnd ){
		pParser->xNameSpaceEnd = xNameSpaceEnd;
	}
	pParser->pUserData = pUserData;
	return SXRET_OK;
}
/* Process an XML chunk */
PH7_PRIVATE sxi32 SyXMLProcess(SyXMLParser *pParser,const char *zInput,sxu32 nByte)
{
	SySet sTagStack;
	SySet sWorker;
	sxi32 rc;
	/* Initialize working sets */
	SySetInit(&sWorker,pParser->pAllocator,sizeof(SyXMLRawStr)); /* Tag container */
	SySetInit(&sTagStack,pParser->pAllocator,sizeof(SyXMLRawStrNS)); /* Tag stack */
	/* Tokenize the entire input */
	rc = SyLexTokenizeInput(&pParser->sLex,zInput,nByte,0,0,0);
	if( rc == SXERR_ABORT ){
		/* Tokenize callback request an operation abort */
		return SXERR_ABORT;
	}
	if( SySetUsed(&pParser->sToken) < 1 ){
		/* Nothing to process [i.e: white spaces] */
		rc = SXRET_OK;
	}else{
		/* Process XML Tokens */
		rc = ProcessXML(&(*pParser),&sTagStack,&sWorker);
		if( pParser->nFlags & SXML_ENABLE_NAMESPACE ){
			if( SySetUsed(&sTagStack) > 0  ){
				SyXMLRawStrNS *pEntry;
				SyHashEntry **apEntry;
				sxu32 n;
				SySetResetCursor(&sTagStack);
				while( SySetGetNextEntry(&sTagStack,(void **)&pEntry) == SXRET_OK ){
					/* Release namespace entries */
					apEntry = (SyHashEntry **)SySetBasePtr(&pEntry->sNSset);
					for( n = 0 ; n < SySetUsed(&pEntry->sNSset) ; ++n ){
						SyMemBackendFree(pParser->pAllocator,apEntry[n]->pUserData);
					}
					SySetRelease(&pEntry->sNSset);
				}
			}
		}
	}
	/* Clean-up the mess left behind */
	SySetRelease(&sWorker);
	SySetRelease(&sTagStack);
	/* Processing result */
	return rc;
}
PH7_PRIVATE sxi32 SyXMLParserRelease(SyXMLParser *pParser)
{
	SyLexRelease(&pParser->sLex);
	SySetRelease(&pParser->sToken);
	SyHashRelease(&pParser->hns);
	return SXRET_OK;
}
/*
 * Zip File Format:
 *
 * Byte order: Little-endian
 * 
 * [Local file header + Compressed data [+ Extended local header]?]*
 * [Central directory]*
 * [End of central directory record]
 * 
 * Local file header:*
 * Offset   Length   Contents
 *  0      4 bytes  Local file header signature (0x04034b50)
 *  4      2 bytes  Version needed to extract
 *  6      2 bytes  General purpose bit flag
 *  8      2 bytes  Compression method
 * 10      2 bytes  Last mod file time
 * 12      2 bytes  Last mod file date
 * 14      4 bytes  CRC-32
 * 18      4 bytes  Compressed size (n)
 * 22      4 bytes  Uncompressed size
 * 26      2 bytes  Filename length (f)
 * 28      2 bytes  Extra field length (e)
 * 30     (f)bytes  Filename
 *        (e)bytes  Extra field
 *        (n)bytes  Compressed data
 *
 * Extended local header:*
 * Offset   Length   Contents
 *  0      4 bytes  Extended Local file header signature (0x08074b50)
 *  4      4 bytes  CRC-32
 *  8      4 bytes  Compressed size
 * 12      4 bytes  Uncompressed size
 *
 * Extra field:?(if any)
 * Offset 	Length		Contents
 * 0	  	2 bytes		Header ID (0x001 until 0xfb4a) see extended appnote from Info-zip
 * 2	  	2 bytes		Data size (g)
 * 		  	(g) bytes	(g) bytes of extra field
 * 
 * Central directory:*
 * Offset   Length   Contents
 *  0      4 bytes  Central file header signature (0x02014b50)
 *  4      2 bytes  Version made by
 *  6      2 bytes  Version needed to extract
 *  8      2 bytes  General purpose bit flag
 * 10      2 bytes  Compression method
 * 12      2 bytes  Last mod file time
 * 14      2 bytes  Last mod file date
 * 16      4 bytes  CRC-32
 * 20      4 bytes  Compressed size
 * 24      4 bytes  Uncompressed size
 * 28      2 bytes  Filename length (f)
 * 30      2 bytes  Extra field length (e)
 * 32      2 bytes  File comment length (c)
 * 34      2 bytes  Disk number start
 * 36      2 bytes  Internal file attributes
 * 38      4 bytes  External file attributes
 * 42      4 bytes  Relative offset of local header
 * 46     (f)bytes  Filename
 *        (e)bytes  Extra field
 *        (c)bytes  File comment
 *
 * End of central directory record:
 * Offset   Length   Contents
 *  0      4 bytes  End of central dir signature (0x06054b50)
 *  4      2 bytes  Number of this disk
 *  6      2 bytes  Number of the disk with the start of the central directory
 *  8      2 bytes  Total number of entries in the central dir on this disk
 * 10      2 bytes  Total number of entries in the central dir
 * 12      4 bytes  Size of the central directory
 * 16      4 bytes  Offset of start of central directory with respect to the starting disk number
 * 20      2 bytes  zipfile comment length (c)
 * 22     (c)bytes  zipfile comment
 *
 * compression method: (2 bytes)
 *          0 - The file is stored (no compression)
 *          1 - The file is Shrunk
 *          2 - The file is Reduced with compression factor 1
 *          3 - The file is Reduced with compression factor 2
 *          4 - The file is Reduced with compression factor 3
 *          5 - The file is Reduced with compression factor 4
 *          6 - The file is Imploded
 *          7 - Reserved for Tokenizing compression algorithm
 *          8 - The file is Deflated
 */ 

#define SXMAKE_ZIP_WORKBUF	(SXU16_HIGH/2)	/* 32KB Initial working buffer size */
#define SXMAKE_ZIP_EXTRACT_VER	0x000a	/* Version needed to extract */
#define SXMAKE_ZIP_VER	0x003	/* Version made by */

#define SXZIP_CENTRAL_MAGIC			0x02014b50
#define SXZIP_END_CENTRAL_MAGIC		0x06054b50
#define SXZIP_LOCAL_MAGIC			0x04034b50
/*#define SXZIP_CRC32_START			0xdebb20e3*/

#define SXZIP_LOCAL_HDRSZ		30	/* Local header size */
#define SXZIP_LOCAL_EXT_HDRZ	16	/* Extended local header(footer) size */
#define SXZIP_CENTRAL_HDRSZ		46	/* Central directory header size */
#define SXZIP_END_CENTRAL_HDRSZ	22	/* End of central directory header size */
	 
#define SXARCHIVE_HASH_SIZE	64 /* Starting hash table size(MUST BE POWER OF 2)*/
static sxi32 SyLittleEndianUnpack32(sxu32 *uNB,const unsigned char *buf,sxu32 Len)
{
	if( Len < sizeof(sxu32) ){ 
		return SXERR_SHORT;
	}
	*uNB =  buf[0] + (buf[1] << 8) + (buf[2] << 16) + (buf[3] << 24);
	return SXRET_OK;
}
static sxi32 SyLittleEndianUnpack16(sxu16 *pOut,const unsigned char *zBuf,sxu32 nLen)
{
	if( nLen < sizeof(sxu16) ){
		return SXERR_SHORT;
	}
	*pOut = zBuf[0] + (zBuf[1] <<8);
	
	return SXRET_OK;
}
static sxi32 SyDosTimeFormat(sxu32 nDosDate,Sytm *pOut)
{
	sxu16 nDate;
	sxu16 nTime;
	nDate = nDosDate >> 16;
	nTime = nDosDate & 0xFFFF;
	pOut->tm_isdst  = 0;
	pOut->tm_year 	= 1980 + (nDate >> 9);
	pOut->tm_mon	= (nDate % (1<<9))>>5;
	pOut->tm_mday	= (nDate % (1<<9))&0x1F;
	pOut->tm_hour	= nTime >> 11;
	pOut->tm_min	= (nTime % (1<<11)) >> 5;
	pOut->tm_sec	= ((nTime % (1<<11))& 0x1F )<<1;
	return SXRET_OK;
}
/*
 * Archive hashtable manager
 */
static sxi32 ArchiveHashGetEntry(SyArchive *pArch,const char *zName,sxu32 nLen,SyArchiveEntry **ppEntry)
{
	SyArchiveEntry *pBucketEntry;
	SyString sEntry;
	sxu32 nHash;

	nHash = pArch->xHash(zName,nLen);
	pBucketEntry = pArch->apHash[nHash & (pArch->nSize - 1)];

	SyStringInitFromBuf(&sEntry,zName,nLen);

	for(;;){
		if( pBucketEntry == 0 ){
			break;
		}
		if( nHash == pBucketEntry->nHash && pArch->xCmp(&sEntry,&pBucketEntry->sFileName) == 0 ){
			if( ppEntry ){
				*ppEntry = pBucketEntry;
			}
			return SXRET_OK;
		}
		pBucketEntry = pBucketEntry->pNextHash;
	}
	return SXERR_NOTFOUND;
}
static void ArchiveHashBucketInstall(SyArchiveEntry **apTable,sxu32 nBucket,SyArchiveEntry *pEntry)
{
	pEntry->pNextHash = apTable[nBucket];
	if( apTable[nBucket] != 0 ){
		apTable[nBucket]->pPrevHash = pEntry;
	}
	apTable[nBucket] = pEntry;
}
static sxi32 ArchiveHashGrowTable(SyArchive *pArch)
{
	sxu32 nNewSize = pArch->nSize * 2;
	SyArchiveEntry **apNew;
	SyArchiveEntry *pEntry;
	sxu32 n;

	/* Allocate a new table */
	apNew = (SyArchiveEntry **)SyMemBackendAlloc(pArch->pAllocator,nNewSize * sizeof(SyArchiveEntry *));
	if( apNew == 0 ){
		return SXRET_OK; /* Not so fatal,simply a performance hit */
	}
	SyZero(apNew,nNewSize * sizeof(SyArchiveEntry *));
	/* Rehash old entries */
	for( n = 0 , pEntry = pArch->pList ; n < pArch->nLoaded ; n++ , pEntry = pEntry->pNext ){
		pEntry->pNextHash = pEntry->pPrevHash = 0;
		ArchiveHashBucketInstall(apNew,pEntry->nHash & (nNewSize - 1),pEntry);
	}
	/* Release the old table */
	SyMemBackendFree(pArch->pAllocator,pArch->apHash);
	pArch->apHash = apNew;
	pArch->nSize = nNewSize;

	return SXRET_OK;
}
static sxi32 ArchiveHashInstallEntry(SyArchive *pArch,SyArchiveEntry *pEntry)
{
	if( pArch->nLoaded > pArch->nSize * 3 ){
		ArchiveHashGrowTable(&(*pArch));
	}
	pEntry->nHash = pArch->xHash(SyStringData(&pEntry->sFileName),SyStringLength(&pEntry->sFileName));
	/* Install the entry in its bucket */
	ArchiveHashBucketInstall(pArch->apHash,pEntry->nHash & (pArch->nSize - 1),pEntry);
	MACRO_LD_PUSH(pArch->pList,pEntry);
	pArch->nLoaded++;

	return SXRET_OK;
}
 /*
  * Parse the End of central directory and report status
  */ 
 static sxi32 ParseEndOfCentralDirectory(SyArchive *pArch,const unsigned char *zBuf)
 {
	sxu32 nMagic = 0; /* cc -O6 warning */
 	sxi32 rc;
 	
 	/* Sanity check */
 	rc = SyLittleEndianUnpack32(&nMagic,zBuf,sizeof(sxu32));
 	if( /* rc != SXRET_OK || */nMagic != SXZIP_END_CENTRAL_MAGIC ){
 		return SXERR_CORRUPT;
 	}
 	/* # of entries */
 	rc = SyLittleEndianUnpack16((sxu16 *)&pArch->nEntry,&zBuf[8],sizeof(sxu16));
 	if( /* rc != SXRET_OK || */ pArch->nEntry > SXI16_HIGH /* SXU16_HIGH */ ){
 		return SXERR_CORRUPT;
 	}
 	/* Size of central directory */
 	rc = SyLittleEndianUnpack32(&pArch->nCentralSize,&zBuf[12],sizeof(sxu32));
 	if( /*rc != SXRET_OK ||*/ pArch->nCentralSize > SXI32_HIGH ){
 		return SXERR_CORRUPT;
 	}
 	/* Starting offset of central directory */
 	rc = SyLittleEndianUnpack32(&pArch->nCentralOfft,&zBuf[16],sizeof(sxu32));
 	if( /*rc != SXRET_OK ||*/ pArch->nCentralSize > SXI32_HIGH ){
 		return SXERR_CORRUPT;
 	}
 	
 	return SXRET_OK;
 }
 /*
  * Fill the zip entry with the appropriate information from the central directory
  */
static sxi32 GetCentralDirectoryEntry(SyArchive *pArch,SyArchiveEntry *pEntry,const unsigned char *zCentral,sxu32 *pNextOffset)
 { 
 	SyString *pName = &pEntry->sFileName; /* File name */
 	sxu16 nDosDate,nDosTime;
	sxu16 nComment = 0 ;
	sxu32 nMagic = 0; /* cc -O6 warning */
	sxi32 rc; 	
	nDosDate = nDosTime = 0; /* cc -O6 warning */
	SXUNUSED(pArch);
 	/* Sanity check */
 	rc = SyLittleEndianUnpack32(&nMagic,zCentral,sizeof(sxu32));
 	if( /* rc != SXRET_OK || */ nMagic != SXZIP_CENTRAL_MAGIC ){
 		rc = SXERR_CORRUPT; 		
 		/*
 		 * Try to recover by examing the next central directory record.
 		 * Dont worry here,there is no risk of an infinite loop since
		 * the buffer size is delimited.
 		 */

 		/* pName->nByte = 0; nComment = 0; pName->nExtra = 0 */
 		goto update;
 	}
 	/*
 	 * entry name length
 	 */
 	SyLittleEndianUnpack16((sxu16 *)&pName->nByte,&zCentral[28],sizeof(sxu16));
 	if( pName->nByte > SXI16_HIGH /* SXU16_HIGH */){
 		 rc = SXERR_BIG;
 		 goto update;
 	}
 	/* Extra information */
 	SyLittleEndianUnpack16(&pEntry->nExtra,&zCentral[30],sizeof(sxu16));
 	/* Comment length  */
 	SyLittleEndianUnpack16(&nComment,&zCentral[32],sizeof(sxu16)); 	
 	/* Compression method 0 == stored / 8 == deflated */
 	rc = SyLittleEndianUnpack16(&pEntry->nComprMeth,&zCentral[10],sizeof(sxu16));
 	/* DOS Timestamp */
 	SyLittleEndianUnpack16(&nDosTime,&zCentral[12],sizeof(sxu16));
 	SyLittleEndianUnpack16(&nDosDate,&zCentral[14],sizeof(sxu16));
 	SyDosTimeFormat((nDosDate << 16 | nDosTime),&pEntry->sFmt);
	/* Little hack to fix month index  */
	pEntry->sFmt.tm_mon--;
 	/* CRC32 */
 	rc = SyLittleEndianUnpack32(&pEntry->nCrc,&zCentral[16],sizeof(sxu32));
 	/* Content size before compression */
 	rc = SyLittleEndianUnpack32(&pEntry->nByte,&zCentral[24],sizeof(sxu32));
 	if(  pEntry->nByte > SXI32_HIGH ){
 		rc = SXERR_BIG;
 		goto update; 
 	} 	
 	/*
 	 * Content size after compression.
 	 * Note that if the file is stored pEntry->nByte should be equal to pEntry->nByteCompr
 	 */ 
 	rc = SyLittleEndianUnpack32(&pEntry->nByteCompr,&zCentral[20],sizeof(sxu32));
 	if( pEntry->nByteCompr > SXI32_HIGH ){
 		rc = SXERR_BIG;
 		goto update; 
 	} 	 	
 	/* Finally grab the contents offset */
 	SyLittleEndianUnpack32(&pEntry->nOfft,&zCentral[42],sizeof(sxu32));
 	if( pEntry->nOfft > SXI32_HIGH ){
 		rc = SXERR_BIG;
 		goto update;
 	} 	
  	 rc = SXRET_OK;
update:	  
 	/* Update the offset to point to the next central directory record */
 	*pNextOffset =  SXZIP_CENTRAL_HDRSZ + pName->nByte + pEntry->nExtra + nComment;
 	return rc; /* Report failure or success */
}
static sxi32 ZipFixOffset(SyArchiveEntry *pEntry,void *pSrc)
{	
	sxu16 nExtra,nNameLen;
	unsigned char *zHdr;
	nExtra = nNameLen = 0;
	zHdr = (unsigned char *)pSrc;
	zHdr = &zHdr[pEntry->nOfft];
	if( SyMemcmp(zHdr,"PK\003\004",sizeof(sxu32)) != 0 ){
		return SXERR_CORRUPT;
	}
	SyLittleEndianUnpack16(&nNameLen,&zHdr[26],sizeof(sxu16));
	SyLittleEndianUnpack16(&nExtra,&zHdr[28],sizeof(sxu16));
	/* Fix contents offset */
	pEntry->nOfft += SXZIP_LOCAL_HDRSZ + nExtra + nNameLen;
	return SXRET_OK;
}
/*
 * Extract all valid entries from the central directory 
 */	 
static sxi32 ZipExtract(SyArchive *pArch,const unsigned char *zCentral,sxu32 nLen,void *pSrc)
{
	SyArchiveEntry *pEntry,*pDup;
	const unsigned char *zEnd ; /* End of central directory */
	sxu32 nIncr,nOfft;          /* Central Offset */
	SyString *pName;	        /* Entry name */
	char *zName;
	sxi32 rc;
	
	nOfft = nIncr = 0;
	zEnd = &zCentral[nLen];
	
	for(;;){
		if( &zCentral[nOfft] >= zEnd ){
			break;
		}
		/* Add a new entry */
		pEntry = (SyArchiveEntry *)SyMemBackendPoolAlloc(pArch->pAllocator,sizeof(SyArchiveEntry));
		if( pEntry == 0 ){
			break;
		}
		SyZero(pEntry,sizeof(SyArchiveEntry)); 
		pEntry->nMagic = SXARCH_MAGIC;
		nIncr = 0;
		rc = GetCentralDirectoryEntry(&(*pArch),pEntry,&zCentral[nOfft],&nIncr);
		if( rc == SXRET_OK ){
			/* Fix the starting record offset so we can access entry contents correctly */
			rc = ZipFixOffset(pEntry,pSrc);
		}
		if(rc != SXRET_OK ){
			sxu32 nJmp = 0;
			SyMemBackendPoolFree(pArch->pAllocator,pEntry);
			/* Try to recover by brute-forcing for a valid central directory record */
			if( SXRET_OK == SyBlobSearch((const void *)&zCentral[nOfft + nIncr],(sxu32)(zEnd - &zCentral[nOfft + nIncr]),
				(const void *)"PK\001\002",sizeof(sxu32),&nJmp)){
					nOfft += nIncr + nJmp; /* Check next entry */
					continue;
			}
			break; /* Giving up,archive is hopelessly corrupted */
		}
		pName = &pEntry->sFileName;
		pName->zString = (const char *)&zCentral[nOfft + SXZIP_CENTRAL_HDRSZ];
		if( pName->nByte <= 0 || ( pEntry->nByte <= 0 && pName->zString[pName->nByte - 1] != '/') ){
			/* Ignore zero length records (except folders) and records without names */
			SyMemBackendPoolFree(pArch->pAllocator,pEntry); 
		 	nOfft += nIncr; /* Check next entry */
			continue;
		}
		zName = SyMemBackendStrDup(pArch->pAllocator,pName->zString,pName->nByte);
 	 	if( zName == 0 ){
 	 		 SyMemBackendPoolFree(pArch->pAllocator,pEntry); 
		 	 nOfft += nIncr; /* Check next entry */
			continue;
 	 	}
		pName->zString = (const char *)zName;
		/* Check for duplicates */
		rc = ArchiveHashGetEntry(&(*pArch),pName->zString,pName->nByte,&pDup);
		if( rc == SXRET_OK ){
			/* Another entry with the same name exists ; link them together */
			pEntry->pNextName = pDup->pNextName;
			pDup->pNextName = pEntry;
			pDup->nDup++;
		}else{
			/* Insert in hashtable */
			ArchiveHashInstallEntry(pArch,pEntry);
		}	
		nOfft += nIncr;	/* Check next record */
	}
	pArch->pCursor = pArch->pList;
	
	return pArch->nLoaded > 0 ? SXRET_OK : SXERR_EMPTY;
} 						
PH7_PRIVATE sxi32 SyZipExtractFromBuf(SyArchive *pArch,const char *zBuf,sxu32 nLen)
 {
 	const unsigned char *zCentral,*zEnd;
 	sxi32 rc;
#if defined(UNTRUST)
 	if( SXARCH_INVALID(pArch) || zBuf == 0 ){
 		return SXERR_INVALID;
 	}
#endif 	
 	/* The miminal size of a zip archive:
 	 * LOCAL_HDR_SZ + CENTRAL_HDR_SZ + END_OF_CENTRAL_HDR_SZ
 	 * 		30				46				22
 	 */
 	 if( nLen < SXZIP_LOCAL_HDRSZ + SXZIP_CENTRAL_HDRSZ + SXZIP_END_CENTRAL_HDRSZ ){
 	 	return SXERR_CORRUPT; /* Don't bother processing return immediately */
 	 }
 	  		
 	zEnd = (unsigned char *)&zBuf[nLen - SXZIP_END_CENTRAL_HDRSZ];
 	/* Find the end of central directory */
 	while( ((sxu32)((unsigned char *)&zBuf[nLen] - zEnd) < (SXZIP_END_CENTRAL_HDRSZ + SXI16_HIGH)) &&
		zEnd > (unsigned char *)zBuf && SyMemcmp(zEnd,"PK\005\006",sizeof(sxu32)) != 0 ){
 		zEnd--;
 	} 	
 	/* Parse the end of central directory */
 	rc = ParseEndOfCentralDirectory(&(*pArch),zEnd);
 	if( rc != SXRET_OK ){
 		return rc;
 	} 	
 	
 	/* Find the starting offset of the central directory */
 	zCentral = &zEnd[-(sxi32)pArch->nCentralSize];
 	if( zCentral <= (unsigned char *)zBuf || SyMemcmp(zCentral,"PK\001\002",sizeof(sxu32)) != 0 ){
 		if( pArch->nCentralOfft >= nLen ){
			/* Corrupted central directory offset */
 			return SXERR_CORRUPT;
 		}
 		zCentral = (unsigned char *)&zBuf[pArch->nCentralOfft];
 		if( SyMemcmp(zCentral,"PK\001\002",sizeof(sxu32)) != 0 ){
 			/* Corrupted zip archive */
 			return SXERR_CORRUPT;
 		}
 		/* Fall thru and extract all valid entries from the central directory */
 	}
 	rc = ZipExtract(&(*pArch),zCentral,(sxu32)(zEnd - zCentral),(void *)zBuf);
 	return rc;
 }
/*
  * Default comparison function.
  */
 static sxi32 ArchiveHashCmp(const SyString *pStr1,const SyString *pStr2)
 {
	 sxi32 rc;
	 rc = SyStringCmp(pStr1,pStr2,SyMemcmp);
	 return rc;
 }
PH7_PRIVATE sxi32 SyArchiveInit(SyArchive *pArch,SyMemBackend *pAllocator,ProcHash xHash,ProcRawStrCmp xCmp)
 {
	SyArchiveEntry **apHash;
#if defined(UNTRUST)
 	if( pArch == 0 ){
 		return SXERR_EMPTY;
 	}
#endif
 	SyZero(pArch,sizeof(SyArchive));
 	/* Allocate a new hashtable */ 	
	apHash = (SyArchiveEntry **)SyMemBackendAlloc(&(*pAllocator),SXARCHIVE_HASH_SIZE * sizeof(SyArchiveEntry *));
	if( apHash == 0){
		return SXERR_MEM;
	}
	SyZero(apHash,SXARCHIVE_HASH_SIZE * sizeof(SyArchiveEntry *));
	pArch->apHash = apHash;
	pArch->xHash  = xHash ? xHash : SyBinHash;
	pArch->xCmp   = xCmp ? xCmp : ArchiveHashCmp;
	pArch->nSize  = SXARCHIVE_HASH_SIZE;
 	pArch->pAllocator = &(*pAllocator);
 	pArch->nMagic = SXARCH_MAGIC;
 	return SXRET_OK;
 }
 static sxi32 ArchiveReleaseEntry(SyMemBackend *pAllocator,SyArchiveEntry *pEntry)
 {
 	SyArchiveEntry *pDup = pEntry->pNextName;
 	SyArchiveEntry *pNextDup;
 	
 	/* Release duplicates first since there are not stored in the hashtable */
 	for(;;){
 		if( pEntry->nDup == 0 ){
 			break;
 		}
 		pNextDup = pDup->pNextName;
		pDup->nMagic = 0x2661;
 		SyMemBackendFree(pAllocator,(void *)SyStringData(&pDup->sFileName));
 		SyMemBackendPoolFree(pAllocator,pDup); 		
 		pDup = pNextDup;
 		pEntry->nDup--;
 	} 		
	pEntry->nMagic = 0x2661;
  	SyMemBackendFree(pAllocator,(void *)SyStringData(&pEntry->sFileName));
 	SyMemBackendPoolFree(pAllocator,pEntry);
 	return SXRET_OK;
 } 	
PH7_PRIVATE sxi32 SyArchiveRelease(SyArchive *pArch)
 {
	SyArchiveEntry *pEntry,*pNext;
 	pEntry = pArch->pList; 	 	
	for(;;){
		if( pArch->nLoaded < 1 ){
			break;
		}
		pNext = pEntry->pNext;
		MACRO_LD_REMOVE(pArch->pList,pEntry);
		ArchiveReleaseEntry(pArch->pAllocator,pEntry);
		pEntry = pNext;
		pArch->nLoaded--;
	}
	SyMemBackendFree(pArch->pAllocator,pArch->apHash);
	pArch->pCursor = 0;
	pArch->nMagic = 0x2626;
	return SXRET_OK;
 }
 PH7_PRIVATE sxi32 SyArchiveResetLoopCursor(SyArchive *pArch)
 {
	pArch->pCursor = pArch->pList;
	return SXRET_OK;
 }
 PH7_PRIVATE sxi32 SyArchiveGetNextEntry(SyArchive *pArch,SyArchiveEntry **ppEntry)
 {
	SyArchiveEntry *pNext;
	if( pArch->pCursor == 0 ){
		/* Rewind the cursor */
		pArch->pCursor = pArch->pList;
		return SXERR_EOF;
	}
	*ppEntry = pArch->pCursor;
	 pNext = pArch->pCursor->pNext;
	 /* Advance the cursor to the next entry */
	 pArch->pCursor = pNext;
	 return SXRET_OK;
  }
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * Psuedo Random Number Generator (PRNG)
 * @authors: SQLite authors <http://www.sqlite.org/>
 * @status: Public Domain
 * NOTE:
 *  Nothing in this file or anywhere else in the library does any kind of
 *  encryption.The RC4 algorithm is being used as a PRNG (pseudo-random
 *  number generator) not as an encryption device.
 */
#define SXPRNG_MAGIC	0x13C4
#ifdef __UNIXES__
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <sys/time.h>
#endif
static sxi32 SyOSUtilRandomSeed(void *pBuf,sxu32 nLen,void *pUnused)
{
	char *zBuf = (char *)pBuf;
#ifdef __WINNT__
	DWORD nProcessID; /* Yes,keep it uninitialized when compiling using the MinGW32 builds tools */
#elif defined(__UNIXES__)
	pid_t pid;
	int fd;
#else
	char zGarbage[128]; /* Yes,keep this buffer uninitialized */
#endif
	SXUNUSED(pUnused);
#ifdef __WINNT__
#ifndef __MINGW32__
	nProcessID = GetProcessId(GetCurrentProcess());
#endif
	SyMemcpy((const void *)&nProcessID,zBuf,SXMIN(nLen,sizeof(DWORD)));
	if( (sxu32)(&zBuf[nLen] - &zBuf[sizeof(DWORD)]) >= sizeof(SYSTEMTIME)  ){
		GetSystemTime((LPSYSTEMTIME)&zBuf[sizeof(DWORD)]);
	}
#elif defined(__UNIXES__)
	fd = open("/dev/urandom",O_RDONLY);
	if (fd >= 0 ){
		if( read(fd,zBuf,nLen) > 0 ){
			close(fd);
			return SXRET_OK;
		}
		/* FALL THRU */
	}
	close(fd);
	pid = getpid();
	SyMemcpy((const void *)&pid,zBuf,SXMIN(nLen,sizeof(pid_t)));
	if( &zBuf[nLen] - &zBuf[sizeof(pid_t)] >= (int)sizeof(struct timeval)  ){
		gettimeofday((struct timeval *)&zBuf[sizeof(pid_t)],0);
	}
#else
	/* Fill with uninitialized data */
	SyMemcpy(zGarbage,zBuf,SXMIN(nLen,sizeof(zGarbage)));
#endif
	return SXRET_OK;
}
PH7_PRIVATE sxi32 SyRandomnessInit(SyPRNGCtx *pCtx,ProcRandomSeed xSeed,void * pUserData)
{
	char zSeed[256];
	sxu8 t;
	sxi32 rc;
	sxu32 i;
	if( pCtx->nMagic == SXPRNG_MAGIC ){
		return SXRET_OK; /* Already initialized */
	}
 /* Initialize the state of the random number generator once,
  ** the first time this routine is called.The seed value does
  ** not need to contain a lot of randomness since we are not
  ** trying to do secure encryption or anything like that...
  */	
	if( xSeed == 0 ){
		xSeed = SyOSUtilRandomSeed;
	}
	rc = xSeed(zSeed,sizeof(zSeed),pUserData);
	if( rc != SXRET_OK ){
		return rc;
	}
	pCtx->i = pCtx->j = 0;
	for(i=0; i < SX_ARRAYSIZE(pCtx->s) ; i++){
		pCtx->s[i] = (unsigned char)i;
    }
    for(i=0; i < sizeof(zSeed) ; i++){
      pCtx->j += pCtx->s[i] + zSeed[i];
      t = pCtx->s[pCtx->j];
      pCtx->s[pCtx->j] = pCtx->s[i];
      pCtx->s[i] = t;
    }
	pCtx->nMagic = SXPRNG_MAGIC;
	
	return SXRET_OK;
}
/*
 * Get a single 8-bit random value using the RC4 PRNG.
 */
static sxu8 randomByte(SyPRNGCtx *pCtx)
{
  sxu8 t;
  
  /* Generate and return single random byte */
  pCtx->i++;
  t = pCtx->s[pCtx->i];
  pCtx->j += t;
  pCtx->s[pCtx->i] = pCtx->s[pCtx->j];
  pCtx->s[pCtx->j] = t;
  t += pCtx->s[pCtx->i];
  return pCtx->s[t];
}
PH7_PRIVATE sxi32 SyRandomness(SyPRNGCtx *pCtx,void *pBuf,sxu32 nLen)
{
	unsigned char *zBuf = (unsigned char *)pBuf;
	unsigned char *zEnd = &zBuf[nLen];
#if defined(UNTRUST)
	if( pCtx == 0 || pBuf == 0 || nLen <= 0 ){
		return SXERR_EMPTY;
	}
#endif
	if(pCtx->nMagic != SXPRNG_MAGIC ){
		return SXERR_CORRUPT;
	}
	for(;;){
		if( zBuf >= zEnd ){break;}	zBuf[0] = randomByte(pCtx);	zBuf++;	
		if( zBuf >= zEnd ){break;}	zBuf[0] = randomByte(pCtx);	zBuf++;	
		if( zBuf >= zEnd ){break;}	zBuf[0] = randomByte(pCtx);	zBuf++;	
		if( zBuf >= zEnd ){break;}	zBuf[0] = randomByte(pCtx);	zBuf++;	
	}
	return SXRET_OK;  
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifndef PH7_DISABLE_HASH_FUNC
/* SyRunTimeApi: sxhash.c */
/*
 * This code implements the MD5 message-digest algorithm.
 * The algorithm is due to Ron Rivest.This code was
 * written by Colin Plumb in 1993, no copyright is claimed.
 * This code is in the public domain; do with it what you wish.
 *
 * Equivalent code is available from RSA Data Security, Inc.
 * This code has been tested against that, and is equivalent,
 * except that you don't need to include two pages of legalese
 * with every copy.
 *
 * To compute the message digest of a chunk of bytes, declare an
 * MD5Context structure, pass it to MD5Init, call MD5Update as
 * needed on buffers full of bytes, and then call MD5Final, which
 * will fill a supplied 16-byte array with the digest.
 */
#define SX_MD5_BINSZ	16
#define SX_MD5_HEXSZ	32
/*
 * Note: this code is harmless on little-endian machines.
 */
static void byteReverse (unsigned char *buf, unsigned longs)
{
	sxu32 t;
        do {
                t = (sxu32)((unsigned)buf[3]<<8 | buf[2]) << 16 |
                            ((unsigned)buf[1]<<8 | buf[0]);
                *(sxu32*)buf = t;
                buf += 4;
        } while (--longs);
}
/* The four core functions - F1 is optimized somewhat */

/* #define F1(x, y, z) (x & y | ~x & z) */
#ifdef F1
#undef F1
#endif
#ifdef F2
#undef F2
#endif
#ifdef F3
#undef F3
#endif
#ifdef F4
#undef F4
#endif

#define F1(x, y, z) (z ^ (x & (y ^ z)))
#define F2(x, y, z) F1(z, x, y)
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))

/* This is the central step in the MD5 algorithm.*/
#define SX_MD5STEP(f, w, x, y, z, data, s) \
        ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )

/*
 * The core of the MD5 algorithm, this alters an existing MD5 hash to
 * reflect the addition of 16 longwords of new data.MD5Update blocks
 * the data and converts bytes into longwords for this routine.
 */
static void MD5Transform(sxu32 buf[4], const sxu32 in[16])
{
	register sxu32 a, b, c, d;

        a = buf[0];
        b = buf[1];
        c = buf[2];
        d = buf[3];

        SX_MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478,  7);
        SX_MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12);
        SX_MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17);
        SX_MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22);
        SX_MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf,  7);
        SX_MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12);
        SX_MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17);
        SX_MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22);
        SX_MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8,  7);
        SX_MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12);
        SX_MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17);
        SX_MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22);
        SX_MD5STEP(F1, a, b, c, d, in[12]+0x6b901122,  7);
        SX_MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12);
        SX_MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17);
        SX_MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22);

        SX_MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562,  5);
        SX_MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340,  9);
        SX_MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14);
        SX_MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20);
        SX_MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d,  5);
        SX_MD5STEP(F2, d, a, b, c, in[10]+0x02441453,  9);
        SX_MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14);
        SX_MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20);
        SX_MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6,  5);
        SX_MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6,  9);
        SX_MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14);
        SX_MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20);
        SX_MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905,  5);
        SX_MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8,  9);
        SX_MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14);
        SX_MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20);

        SX_MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942,  4);
        SX_MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11);
        SX_MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16);
        SX_MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23);
        SX_MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44,  4);
        SX_MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11);
        SX_MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16);
        SX_MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23);
        SX_MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6,  4);
        SX_MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11);
        SX_MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16);
        SX_MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23);
        SX_MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039,  4);
        SX_MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11);
        SX_MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16);
        SX_MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23);

        SX_MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244,  6);
        SX_MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10);
        SX_MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15);
        SX_MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21);
        SX_MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3,  6);
        SX_MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10);
        SX_MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15);
        SX_MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21);
        SX_MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f,  6);
        SX_MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10);
        SX_MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15);
        SX_MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21);
        SX_MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82,  6);
        SX_MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10);
        SX_MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15);
        SX_MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21);

        buf[0] += a;
        buf[1] += b;
        buf[2] += c;
        buf[3] += d;
}
/*
 * Update context to reflect the concatenation of another buffer full
 * of bytes.
 */
PH7_PRIVATE void MD5Update(MD5Context *ctx, const unsigned char *buf, unsigned int len)
{
	sxu32 t;

        /* Update bitcount */
        t = ctx->bits[0];
        if ((ctx->bits[0] = t + ((sxu32)len << 3)) < t)
                ctx->bits[1]++; /* Carry from low to high */
        ctx->bits[1] += len >> 29;
        t = (t >> 3) & 0x3f;    /* Bytes already in shsInfo->data */
        /* Handle any leading odd-sized chunks */
        if ( t ) {
                unsigned char *p = (unsigned char *)ctx->in + t;

                t = 64-t;
                if (len < t) {
                        SyMemcpy(buf,p,len);
                        return;
                }
                SyMemcpy(buf,p,t);
                byteReverse(ctx->in, 16);
                MD5Transform(ctx->buf, (sxu32*)ctx->in);
                buf += t;
                len -= t;
        }
        /* Process data in 64-byte chunks */
        while (len >= 64) {
                SyMemcpy(buf,ctx->in,64);
                byteReverse(ctx->in, 16);
                MD5Transform(ctx->buf, (sxu32*)ctx->in);
                buf += 64;
                len -= 64;
        }
        /* Handle any remaining bytes of data.*/
        SyMemcpy(buf,ctx->in,len);
}
/*
 * Final wrapup - pad to 64-byte boundary with the bit pattern 
 * 1 0* (64-bit count of bits processed, MSB-first)
 */
PH7_PRIVATE void MD5Final(unsigned char digest[16], MD5Context *ctx){
        unsigned count;
        unsigned char *p;

        /* Compute number of bytes mod 64 */
        count = (ctx->bits[0] >> 3) & 0x3F;

        /* Set the first char of padding to 0x80.This is safe since there is
           always at least one byte free */
        p = ctx->in + count;
        *p++ = 0x80;

        /* Bytes of padding needed to make 64 bytes */
        count = 64 - 1 - count;

        /* Pad out to 56 mod 64 */
        if (count < 8) {
                /* Two lots of padding:  Pad the first block to 64 bytes */
               SyZero(p,count);
                byteReverse(ctx->in, 16);
                MD5Transform(ctx->buf, (sxu32*)ctx->in);

                /* Now fill the next block with 56 bytes */
                SyZero(ctx->in,56);
        } else {
                /* Pad block to 56 bytes */
                SyZero(p,count-8);
        }
        byteReverse(ctx->in, 14);

        /* Append length in bits and transform */
        ((sxu32*)ctx->in)[ 14 ] = ctx->bits[0];
        ((sxu32*)ctx->in)[ 15 ] = ctx->bits[1];

        MD5Transform(ctx->buf, (sxu32*)ctx->in);
        byteReverse((unsigned char *)ctx->buf, 4);
        SyMemcpy(ctx->buf,digest,0x10);
        SyZero(ctx,sizeof(ctx));    /* In case it's sensitive */
}
#undef F1
#undef F2
#undef F3
#undef F4
PH7_PRIVATE sxi32 MD5Init(MD5Context *pCtx)
{	
	pCtx->buf[0] = 0x67452301;
    pCtx->buf[1] = 0xefcdab89;
    pCtx->buf[2] = 0x98badcfe;
    pCtx->buf[3] = 0x10325476;
    pCtx->bits[0] = 0;
    pCtx->bits[1] = 0;
   
   return SXRET_OK;
}
PH7_PRIVATE sxi32 SyMD5Compute(const void *pIn,sxu32 nLen,unsigned char zDigest[16])
{
	MD5Context sCtx;
	MD5Init(&sCtx);
	MD5Update(&sCtx,(const unsigned char *)pIn,nLen);
	MD5Final(zDigest,&sCtx);	
	return SXRET_OK;
}
/*
 * SHA-1 in C
 * By Steve Reid <steve@edmweb.com>
 * Status: Public Domain
 */
/*
 * blk0() and blk() perform the initial expand.
 * I got the idea of expanding during the round function from SSLeay
 *
 * blk0le() for little-endian and blk0be() for big-endian.
 */
#if __GNUC__ && (defined(__i386__) || defined(__x86_64__))
/*
 * GCC by itself only generates left rotates.  Use right rotates if
 * possible to be kinder to dinky implementations with iterative rotate
 * instructions.
 */
#define SHA_ROT(op, x, k) \
        ({ unsigned int y; asm(op " %1,%0" : "=r" (y) : "I" (k), "0" (x)); y; })
#define rol(x,k) SHA_ROT("roll", x, k)
#define ror(x,k) SHA_ROT("rorl", x, k)

#else
/* Generic C equivalent */
#define SHA_ROT(x,l,r) ((x) << (l) | (x) >> (r))
#define rol(x,k) SHA_ROT(x,k,32-(k))
#define ror(x,k) SHA_ROT(x,32-(k),k)
#endif

#define blk0le(i) (block[i] = (ror(block[i],8)&0xFF00FF00) \
    |(rol(block[i],8)&0x00FF00FF))
#define blk0be(i) block[i]
#define blk(i) (block[i&15] = rol(block[(i+13)&15]^block[(i+8)&15] \
    ^block[(i+2)&15]^block[i&15],1))

/*
 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
 *
 * Rl0() for little-endian and Rb0() for big-endian.  Endianness is 
 * determined at run-time.
 */
#define Rl0(v,w,x,y,z,i) \
    z+=((w&(x^y))^y)+blk0le(i)+0x5A827999+rol(v,5);w=ror(w,2);
#define Rb0(v,w,x,y,z,i) \
    z+=((w&(x^y))^y)+blk0be(i)+0x5A827999+rol(v,5);w=ror(w,2);
#define R1(v,w,x,y,z,i) \
    z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=ror(w,2);
#define R2(v,w,x,y,z,i) \
    z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=ror(w,2);
#define R3(v,w,x,y,z,i) \
    z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=ror(w,2);
#define R4(v,w,x,y,z,i) \
    z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=ror(w,2);

/*
 * Hash a single 512-bit block. This is the core of the algorithm.
 */
#define a qq[0]
#define b qq[1]
#define c qq[2]
#define d qq[3]
#define e qq[4]

static void SHA1Transform(unsigned int state[5], const unsigned char buffer[64])
{
  unsigned int qq[5]; /* a, b, c, d, e; */
  static int one = 1;
  unsigned int block[16];
  SyMemcpy(buffer,(void *)block,64);
  SyMemcpy(state,qq,5*sizeof(unsigned int));

  /* Copy context->state[] to working vars */
  /*
  a = state[0];
  b = state[1];
  c = state[2];
  d = state[3];
  e = state[4];
  */

  /* 4 rounds of 20 operations each. Loop unrolled. */
  if( 1 == *(unsigned char*)&one ){
    Rl0(a,b,c,d,e, 0); Rl0(e,a,b,c,d, 1); Rl0(d,e,a,b,c, 2); Rl0(c,d,e,a,b, 3);
    Rl0(b,c,d,e,a, 4); Rl0(a,b,c,d,e, 5); Rl0(e,a,b,c,d, 6); Rl0(d,e,a,b,c, 7);
    Rl0(c,d,e,a,b, 8); Rl0(b,c,d,e,a, 9); Rl0(a,b,c,d,e,10); Rl0(e,a,b,c,d,11);
    Rl0(d,e,a,b,c,12); Rl0(c,d,e,a,b,13); Rl0(b,c,d,e,a,14); Rl0(a,b,c,d,e,15);
  }else{
    Rb0(a,b,c,d,e, 0); Rb0(e,a,b,c,d, 1); Rb0(d,e,a,b,c, 2); Rb0(c,d,e,a,b, 3);
    Rb0(b,c,d,e,a, 4); Rb0(a,b,c,d,e, 5); Rb0(e,a,b,c,d, 6); Rb0(d,e,a,b,c, 7);
    Rb0(c,d,e,a,b, 8); Rb0(b,c,d,e,a, 9); Rb0(a,b,c,d,e,10); Rb0(e,a,b,c,d,11);
    Rb0(d,e,a,b,c,12); Rb0(c,d,e,a,b,13); Rb0(b,c,d,e,a,14); Rb0(a,b,c,d,e,15);
  }
  R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
  R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
  R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
  R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
  R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
  R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
  R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
  R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
  R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
  R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
  R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
  R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
  R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
  R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
  R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
  R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);

  /* Add the working vars back into context.state[] */
  state[0] += a;
  state[1] += b;
  state[2] += c;
  state[3] += d;
  state[4] += e;
}
#undef a
#undef b
#undef c
#undef d
#undef e
/*
 * SHA1Init - Initialize new context
 */
PH7_PRIVATE void SHA1Init(SHA1Context *context){
    /* SHA1 initialization constants */
    context->state[0] = 0x67452301;
    context->state[1] = 0xEFCDAB89;
    context->state[2] = 0x98BADCFE;
    context->state[3] = 0x10325476;
    context->state[4] = 0xC3D2E1F0;
    context->count[0] = context->count[1] = 0;
}
/*
 * Run your data through this.
 */
PH7_PRIVATE void SHA1Update(SHA1Context *context,const unsigned char *data,unsigned int len){
    unsigned int i, j;

    j = context->count[0];
    if ((context->count[0] += len << 3) < j)
	context->count[1] += (len>>29)+1;
    j = (j >> 3) & 63;
    if ((j + len) > 63) {
		(void)SyMemcpy(data,&context->buffer[j],  (i = 64-j));
	SHA1Transform(context->state, context->buffer);
	for ( ; i + 63 < len; i += 64)
	    SHA1Transform(context->state, &data[i]);
	j = 0;
    } else {
	i = 0;
    }
	(void)SyMemcpy(&data[i],&context->buffer[j],len - i);
}
/*
 * Add padding and return the message digest.
 */
PH7_PRIVATE void SHA1Final(SHA1Context *context, unsigned char digest[20]){
    unsigned int i;
    unsigned char finalcount[8];

    for (i = 0; i < 8; i++) {
	finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
	 >> ((3-(i & 3)) * 8) ) & 255);	 /* Endian independent */
    }
    SHA1Update(context, (const unsigned char *)"\200", 1);
    while ((context->count[0] & 504) != 448)
	SHA1Update(context, (const unsigned char *)"\0", 1);
    SHA1Update(context, finalcount, 8);  /* Should cause a SHA1Transform() */

    if (digest) {
	for (i = 0; i < 20; i++)
	    digest[i] = (unsigned char)
		((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
    }
}
#undef Rl0
#undef Rb0
#undef R1
#undef R2
#undef R3
#undef R4

PH7_PRIVATE sxi32 SySha1Compute(const void *pIn,sxu32 nLen,unsigned char zDigest[20])
{
	SHA1Context sCtx;
	SHA1Init(&sCtx);
	SHA1Update(&sCtx,(const unsigned char *)pIn,nLen);
	SHA1Final(&sCtx,zDigest);
	return SXRET_OK;
}
static const sxu32 crc32_table[] = {
	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
	0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
	0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
	0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
	0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
	0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
	0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
	0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
	0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
	0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
	0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
	0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
	0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
	0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
	0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
	0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
	0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
	0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
	0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
	0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
	0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
	0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
	0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
	0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
	0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
#define CRC32C(c,d) (c = ( crc32_table[(c ^ (d)) & 0xFF] ^ (c>>8) ) )
static sxu32 SyCrc32Update(sxu32 crc32,const void *pSrc,sxu32 nLen)
{
	register unsigned char *zIn = (unsigned char *)pSrc;
	unsigned char *zEnd;
	if( zIn == 0 ){
		return crc32;
	}
	zEnd = &zIn[nLen];
	for(;;){
		if(zIn >= zEnd ){ break; } CRC32C(crc32,zIn[0]); zIn++;
		if(zIn >= zEnd ){ break; } CRC32C(crc32,zIn[0]); zIn++;
		if(zIn >= zEnd ){ break; } CRC32C(crc32,zIn[0]); zIn++;
		if(zIn >= zEnd ){ break; } CRC32C(crc32,zIn[0]); zIn++;
	}
		
	return crc32;
}
PH7_PRIVATE sxu32 SyCrc32(const void *pSrc,sxu32 nLen)
{
	return SyCrc32Update(SXU32_HIGH,pSrc,nLen);
}
#endif /* PH7_DISABLE_HASH_FUNC */
#endif /* PH7_DISABLE_BUILTIN_FUNC */
#ifndef PH7_DISABLE_BUILTIN_FUNC
PH7_PRIVATE sxi32 SyBinToHexConsumer(const void *pIn,sxu32 nLen,ProcConsumer xConsumer,void *pConsumerData)
{
	static const unsigned char zHexTab[] = "0123456789abcdef";
	const unsigned char *zIn,*zEnd;
	unsigned char zOut[3];
	sxi32 rc;
#if defined(UNTRUST)
	if( pIn == 0 || xConsumer == 0 ){
		return SXERR_EMPTY;
	}
#endif
	zIn   = (const unsigned char *)pIn;
	zEnd  = &zIn[nLen];
	for(;;){
		if( zIn >= zEnd  ){
			break;
		}
		zOut[0] = zHexTab[zIn[0] >> 4];  zOut[1] = zHexTab[zIn[0] & 0x0F];
		rc = xConsumer((const void *)zOut,sizeof(char)*2,pConsumerData);
		if( rc != SXRET_OK ){
			return rc;
		}
		zIn++; 
	}
	return SXRET_OK;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * ----------------------------------------------------------
 * File: lex.c
 * MD5: c218c13068ed53acb1154762f9e6fd13
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: lex.c v2.8 Ubuntu-linux 2012-07-13 01:21 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/*
 * This file implement an efficient hand-coded,thread-safe and full-reentrant 
 * lexical analyzer/Tokenizer for the PH7 engine.
 */
/* Forward declaration */
static sxu32 KeywordCode(const char *z, int n);
static sxi32 LexExtractHeredoc(SyStream *pStream,SyToken *pToken);
/*
 * Tokenize a raw PHP input.
 * Get a single low-level token from the input file. Update the stream pointer so that
 * it points to the first character beyond the extracted token.
 */
static sxi32 TokenizePHP(SyStream *pStream,SyToken *pToken,void *pUserData,void *pCtxData)
{
	SyString *pStr;
	sxi32 rc;
	/* Ignore leading white spaces */
	while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisSpace(pStream->zText[0]) ){
		/* Advance the stream cursor */
		if( pStream->zText[0] == '\n' ){
			/* Update line counter */
			pStream->nLine++;
		}
		pStream->zText++;
	}
	if( pStream->zText >= pStream->zEnd ){
		/* End of input reached */
		return SXERR_EOF;
	}
	/* Record token starting position and line */
	pToken->nLine = pStream->nLine;
	pToken->pUserData = 0;
	pStr = &pToken->sData;
	SyStringInitFromBuf(pStr,pStream->zText,0);
	if( pStream->zText[0] >= 0xc0 || SyisAlpha(pStream->zText[0]) || pStream->zText[0] == '_' ){
		/* The following code fragment is taken verbatim from the xPP source tree.
		 * xPP is a modern embeddable macro processor with advanced features useful for
		 * application seeking for a production quality,ready to use macro processor.
		 * xPP is a widely used library developed and maintened by Symisc Systems.
		 * You can reach the xPP home page by following this link:
		 * http://xpp.symisc.net/
		 */
		const unsigned char *zIn;
		sxu32 nKeyword;
		/* Isolate UTF-8 or alphanumeric stream */
		if( pStream->zText[0] < 0xc0 ){
			pStream->zText++;
		}
		for(;;){
			zIn = pStream->zText;
			if( zIn[0] >= 0xc0 ){
				zIn++;
				/* UTF-8 stream */
				while( zIn < pStream->zEnd && ((zIn[0] & 0xc0) == 0x80) ){
					zIn++;
				}
			}
			/* Skip alphanumeric stream */
			while( zIn < pStream->zEnd && zIn[0] < 0xc0 && (SyisAlphaNum(zIn[0]) || zIn[0] == '_') ){
				zIn++;
			}
			if( zIn == pStream->zText ){
				/* Not an UTF-8 or alphanumeric stream */
				break;
			}
			/* Synchronize pointers */
			pStream->zText = zIn;
		}
		/* Record token length */
		pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
		nKeyword = KeywordCode(pStr->zString,(int)pStr->nByte);
		if( nKeyword != PH7_TK_ID ){
			if( nKeyword & 
				(PH7_TKWRD_NEW|PH7_TKWRD_CLONE|PH7_TKWRD_AND|PH7_TKWRD_XOR|PH7_TKWRD_OR|PH7_TKWRD_INSTANCEOF|PH7_TKWRD_SEQ|PH7_TKWRD_SNE) ){
					/* Alpha stream operators [i.e: new,clone,and,instanceof,eq,ne,or,xor],save the operator instance for later processing */
					pToken->pUserData = (void *)PH7_ExprExtractOperator(pStr,0);
					/* Mark as an operator */
					pToken->nType = PH7_TK_ID|PH7_TK_OP;
			}else{
				/* We are dealing with a keyword [i.e: while,foreach,class...],save the keyword ID */
				pToken->nType = PH7_TK_KEYWORD;
				pToken->pUserData = SX_INT_TO_PTR(nKeyword);
			}
		}else{
			/* A simple identifier */
			pToken->nType = PH7_TK_ID;
		}
	}else{
		sxi32 c;
		/* Non-alpha stream */
		if( pStream->zText[0] == '#' || 
			( pStream->zText[0] == '/' &&  &pStream->zText[1] < pStream->zEnd && pStream->zText[1] == '/') ){
				pStream->zText++;
				/* Inline comments */
				while( pStream->zText < pStream->zEnd && pStream->zText[0] != '\n' ){
					pStream->zText++;
				}
				/* Tell the upper-layer to ignore this token */ 
				return SXERR_CONTINUE;
		}else if( pStream->zText[0] == '/' && &pStream->zText[1] < pStream->zEnd && pStream->zText[1] == '*' ){
			pStream->zText += 2;
			/* Block comment */
			while( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '*' ){
					if( &pStream->zText[1] >= pStream->zEnd || pStream->zText[1] == '/'  ){
						break;
					}
				}
				if( pStream->zText[0] == '\n' ){
					pStream->nLine++;
				}
				pStream->zText++;
			}
			pStream->zText += 2;
			/* Tell the upper-layer to ignore this token */
			return SXERR_CONTINUE;
		}else if( SyisDigit(pStream->zText[0]) ){
			pStream->zText++;
			/* Decimal digit stream */
			while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
				pStream->zText++;
			}
			/* Mark the token as integer until we encounter a real number */
			pToken->nType = PH7_TK_INTEGER;
			if( pStream->zText < pStream->zEnd ){
				c = pStream->zText[0];
				if( c == '.' ){
					/* Real number */
					pStream->zText++;
					while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
						pStream->zText++;
					}
					if( pStream->zText < pStream->zEnd ){
						c = pStream->zText[0];
						if( c=='e' || c=='E' ){
							pStream->zText++;
							if( pStream->zText < pStream->zEnd ){
								c = pStream->zText[0];
								if( (c =='+' || c=='-') && &pStream->zText[1] < pStream->zEnd  &&
									pStream->zText[1] < 0xc0 && SyisDigit(pStream->zText[1]) ){
										pStream->zText++;
								}
								while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
									pStream->zText++;
								}
							}
						}
					}
					pToken->nType = PH7_TK_REAL;
				}else if( c=='e' || c=='E' ){
					SXUNUSED(pUserData); /* Prevent compiler warning */
					SXUNUSED(pCtxData);
					pStream->zText++;
					if( pStream->zText < pStream->zEnd ){
						c = pStream->zText[0];
						if( (c =='+' || c=='-') && &pStream->zText[1] < pStream->zEnd  &&
							pStream->zText[1] < 0xc0 && SyisDigit(pStream->zText[1]) ){
								pStream->zText++;
						}
						while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisDigit(pStream->zText[0]) ){
							pStream->zText++;
						}
					}
					pToken->nType = PH7_TK_REAL;
				}else if( c == 'x' || c == 'X' ){
					/* Hex digit stream */
					pStream->zText++;
					while( pStream->zText < pStream->zEnd && pStream->zText[0] < 0xc0 && SyisHex(pStream->zText[0]) ){
						pStream->zText++;
					}
				}else if(c  == 'b' || c == 'B' ){
					/* Binary digit stream */
					pStream->zText++;
					while( pStream->zText < pStream->zEnd && (pStream->zText[0] == '0' || pStream->zText[0] == '1') ){
						pStream->zText++;
					}
				}
			}
			/* Record token length */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
			return SXRET_OK;
		}
		c = pStream->zText[0];
		pStream->zText++; /* Advance the stream cursor */
		/* Assume we are dealing with an operator*/
		pToken->nType = PH7_TK_OP;
		switch(c){
		case '$': pToken->nType = PH7_TK_DOLLAR; break;
		case '{': pToken->nType = PH7_TK_OCB;    break;
		case '}': pToken->nType = PH7_TK_CCB;    break;
		case '(': pToken->nType = PH7_TK_LPAREN; break; 
		case '[': pToken->nType |= PH7_TK_OSB;   break; /* Bitwise operation here,since the square bracket token '[' 
														 * is a potential operator [i.e: subscripting] */
		case ']': pToken->nType = PH7_TK_CSB;    break;
		case ')': {
			SySet *pTokSet = pStream->pSet;
			/* Assemble type cast operators [i.e: (int),(float),(bool)...] */ 
			if( pTokSet->nUsed >= 2 ){
				SyToken *pTmp;
				/* Peek the last recongnized token */
				pTmp = (SyToken *)SySetPeek(pTokSet);
				if( pTmp->nType & PH7_TK_KEYWORD ){
					sxi32 nID = SX_PTR_TO_INT(pTmp->pUserData);
					if( (sxu32)nID & (PH7_TKWRD_ARRAY|PH7_TKWRD_INT|PH7_TKWRD_FLOAT|PH7_TKWRD_STRING|PH7_TKWRD_OBJECT|PH7_TKWRD_BOOL|PH7_TKWRD_UNSET) ){
						pTmp = (SyToken *)SySetAt(pTokSet,pTokSet->nUsed - 2);
						if( pTmp->nType & PH7_TK_LPAREN ){
							/* Merge the three tokens '(' 'TYPE' ')' into a single one */
							const char * zTypeCast = "(int)";
							if( nID & PH7_TKWRD_FLOAT ){
								zTypeCast = "(float)";
							}else if( nID & PH7_TKWRD_BOOL ){
								zTypeCast = "(bool)";
							}else if( nID & PH7_TKWRD_STRING ){
								zTypeCast = "(string)";
							}else if( nID & PH7_TKWRD_ARRAY ){
								zTypeCast = "(array)";
							}else if( nID & PH7_TKWRD_OBJECT ){
								zTypeCast = "(object)";
							}else if( nID & PH7_TKWRD_UNSET ){
								zTypeCast = "(unset)";
							}
							/* Reflect the change */
							pToken->nType = PH7_TK_OP;
							SyStringInitFromBuf(&pToken->sData,zTypeCast,SyStrlen(zTypeCast));
							/* Save the instance associated with the type cast operator */
							pToken->pUserData = (void *)PH7_ExprExtractOperator(&pToken->sData,0);
							/* Remove the two previous tokens */
							pTokSet->nUsed -= 2;
							return SXRET_OK;
						}
					}
				}
			}
			pToken->nType = PH7_TK_RPAREN;
			break;
				  }
		case '\'':{
			/* Single quoted string */
			pStr->zString++;
			while( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '\''  ){
					if( pStream->zText[-1] != '\\' ){
						break;
					}else{
						const unsigned char *zPtr = &pStream->zText[-2];
						sxi32 i = 1;
						while( zPtr > pStream->zInput && zPtr[0] == '\\' ){
							zPtr--;
							i++;
						}
						if((i&1)==0){
							break;
						}
					}
				}
				if( pStream->zText[0] == '\n' ){
					pStream->nLine++;
				}
				pStream->zText++;
			}
			/* Record token length and type */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
			pToken->nType = PH7_TK_SSTR;
			/* Jump the trailing single quote */
			pStream->zText++;
			return SXRET_OK;
				  }
		case '"':{
			sxi32 iNest;
			/* Double quoted string */
			pStr->zString++;
			while( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '{' && &pStream->zText[1] < pStream->zEnd && pStream->zText[1] == '$'){
					iNest = 1;
					pStream->zText++;
					/* TICKET 1433-40: Hnadle braces'{}' in double quoted string where everything is allowed */
					while(pStream->zText < pStream->zEnd ){
						if( pStream->zText[0] == '{' ){
							iNest++;
						}else if (pStream->zText[0] == '}' ){
							iNest--;
							if( iNest <= 0 ){
								pStream->zText++;
								break;
							}
						}else if( pStream->zText[0] == '\n' ){
							pStream->nLine++;
						}
						pStream->zText++;
					}
					if( pStream->zText >= pStream->zEnd ){
						break;
					}
				}
				if( pStream->zText[0] == '"' ){
					if( pStream->zText[-1] != '\\' ){
						break;
					}else{
						const unsigned char *zPtr = &pStream->zText[-2];
						sxi32 i = 1;
						while( zPtr > pStream->zInput && zPtr[0] == '\\' ){
							zPtr--;
							i++;
						}
						if((i&1)==0){
							break;
						}
					}
				}
				if( pStream->zText[0] == '\n' ){
					pStream->nLine++;
				}
				pStream->zText++;
			}
			/* Record token length and type */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
			pToken->nType = PH7_TK_DSTR;
			/* Jump the trailing quote */
			pStream->zText++;
			return SXRET_OK;
				  }
		case '`':{
			/* Backtick quoted string */
			pStr->zString++;
			while( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '`' && pStream->zText[-1] != '\\' ){
					break;
				}
				if( pStream->zText[0] == '\n' ){
					pStream->nLine++;
				}
				pStream->zText++;
			}
			/* Record token length and type */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
			pToken->nType = PH7_TK_BSTR;
			/* Jump the trailing backtick */
			pStream->zText++;
			return SXRET_OK;
				  }
		case '\\': pToken->nType = PH7_TK_NSSEP;  break;
		case ':':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == ':' ){
				/* Current operator: '::' */
				pStream->zText++;
			}else{
				pToken->nType = PH7_TK_COLON; /* Single colon */
			}
			break;
		case ',': pToken->nType |= PH7_TK_COMMA;  break; /* Comma is also an operator */
		case ';': pToken->nType = PH7_TK_SEMI;    break;
			/* Handle combined operators [i.e: +=,===,!=== ...] */
		case '=':
			pToken->nType |= PH7_TK_EQUAL;
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '=' ){
					pToken->nType &= ~PH7_TK_EQUAL;
					/* Current operator: == */
					pStream->zText++;
					if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
						/* Current operator: === */
						pStream->zText++;
					}
				}else if( pStream->zText[0] == '>' ){
					/* Array operator: => */
					pToken->nType = PH7_TK_ARRAY_OP;
					pStream->zText++;
				}else{
					/* TICKET 1433-0010: Reference operator '=&' */
					const unsigned char *zCur = pStream->zText;
					sxu32 nLine = 0;
					while( zCur < pStream->zEnd && zCur[0] < 0xc0 && SyisSpace(zCur[0]) ){
						if( zCur[0] == '\n' ){
							nLine++;
						}
						zCur++;
					}
					if( zCur < pStream->zEnd && zCur[0] == '&' ){
						/* Current operator: =& */
						pToken->nType &= ~PH7_TK_EQUAL;
						SyStringInitFromBuf(pStr,"=&",sizeof("=&")-1);
						/* Update token stream */
						pStream->zText = &zCur[1];
						pStream->nLine += nLine; 
					}
				}
			}
			break;
		case '!':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
				/* Current operator: != */
				pStream->zText++;
				if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
					/* Current operator: !== */
					pStream->zText++;
				}
			}
			break;
		case '&':
			pToken->nType |= PH7_TK_AMPER;
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '&' ){
					pToken->nType &= ~PH7_TK_AMPER;
					/* Current operator: && */
					pStream->zText++;
				}else if( pStream->zText[0] == '=' ){
					pToken->nType &= ~PH7_TK_AMPER;
					/* Current operator: &= */
					pStream->zText++;
				}
			}
			break;
		case '|':
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '|' ){
					/* Current operator: || */
					pStream->zText++;
				}else if( pStream->zText[0] == '=' ){
					/* Current operator: |= */
					pStream->zText++;
				}
			}
			break;
		case '+':
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '+' ){
					/* Current operator: ++ */
					pStream->zText++;
				}else if( pStream->zText[0] == '=' ){
					/* Current operator: += */
					pStream->zText++;
				}
			}
			break;
		case '-':
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '-' ){
					/* Current operator: -- */
					pStream->zText++;
				}else if( pStream->zText[0] == '=' ){
					/* Current operator: -= */
					pStream->zText++;
				}else if( pStream->zText[0] == '>' ){
					/* Current operator: -> */
					pStream->zText++;
				}
			}
			break;
		case '*':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
				/* Current operator: *= */
				pStream->zText++;
			}
			break;
		case '/':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
				/* Current operator: /= */
				pStream->zText++;
			}
			break;
		case '%':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
				/* Current operator: %= */
				pStream->zText++;
			}
			break;
		case '^':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
				/* Current operator: ^= */
				pStream->zText++;
			}
			break;
		case '.':
			if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
				/* Current operator: .= */
				pStream->zText++;
			}
			break;
		case '<':
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '<' ){
					/* Current operator: << */
					pStream->zText++;
					if( pStream->zText < pStream->zEnd ){
						if( pStream->zText[0] == '=' ){
							/* Current operator: <<= */
							pStream->zText++;
						}else if( pStream->zText[0] == '<' ){
							/* Current Token: <<<  */
							pStream->zText++;
							/* This may be the beginning of a Heredoc/Nowdoc string,try to delimit it */
							rc = LexExtractHeredoc(&(*pStream),&(*pToken));
							if( rc == SXRET_OK ){
								/* Here/Now doc successfuly extracted */
								return SXRET_OK;
							}
						}
					}
				}else if( pStream->zText[0] == '>' ){
					/* Current operator: <> */
					pStream->zText++;
				}else if( pStream->zText[0] == '=' ){
					/* Current operator: <= */
					pStream->zText++;
				}
			}
			break;
		case '>':
			if( pStream->zText < pStream->zEnd ){
				if( pStream->zText[0] == '>' ){
					/* Current operator: >> */
					pStream->zText++;
					if( pStream->zText < pStream->zEnd && pStream->zText[0] == '=' ){
						/* Current operator: >>= */
						pStream->zText++;
					}
				}else if( pStream->zText[0] == '=' ){
					/* Current operator: >= */
					pStream->zText++;
				}
			}
			break;
		default:
			break;
		}
		if( pStr->nByte <= 0 ){
			/* Record token length */
			pStr->nByte = (sxu32)((const char *)pStream->zText-pStr->zString);
		}
		if( pToken->nType & PH7_TK_OP ){
			const ph7_expr_op *pOp;
			/* Check if the extracted token is an operator */
			pOp = PH7_ExprExtractOperator(pStr,(SyToken *)SySetPeek(pStream->pSet));
			if( pOp == 0 ){
				/* Not an operator */
				pToken->nType &= ~PH7_TK_OP;
				if( pToken->nType <= 0 ){
					pToken->nType = PH7_TK_OTHER;
				}
			}else{
				/* Save the instance associated with this operator for later processing */
				pToken->pUserData = (void *)pOp;
			}
		}
	}
	/* Tell the upper-layer to save the extracted token for later processing */
	return SXRET_OK;
}
/***** This file contains automatically generated code ******
**
** The code in this file has been automatically generated by
**
**     $Header: /sqlite/sqlite/tool/mkkeywordhash.c
**
** Sligthly modified by Chems mrad <chm@symisc.net> for the PH7 engine.
**
** The code in this file implements a function that determines whether
** or not a given identifier is really a PHP keyword.  The same thing
** might be implemented more directly using a hand-written hash table.
** But by using this automatically generated code, the size of the code
** is substantially reduced.  This is important for embedded applications
** on platforms with limited memory.
*/
/* Hash score: 103 */
static sxu32 KeywordCode(const char *z, int n){
  /* zText[] encodes 532 bytes of keywords in 333 bytes */
  /*   extendswitchprintegerequire_oncenddeclareturnamespacechobject      */
  /*   hrowbooleandefaultrycaselfinalistaticlonewconstringlobaluse        */
  /*   lseifloatvarrayANDIEchoUSECHOabstractclasscontinuendifunction      */
  /*   diendwhilevaldoexitgotoimplementsinclude_oncemptyinstanceof        */
  /*   interfacendforeachissetparentprivateprotectedpublicatchunset       */
  /*   xorARRAYASArrayEXITUNSETXORbreak                                   */
  static const char zText[332] = {
    'e','x','t','e','n','d','s','w','i','t','c','h','p','r','i','n','t','e',
    'g','e','r','e','q','u','i','r','e','_','o','n','c','e','n','d','d','e',
    'c','l','a','r','e','t','u','r','n','a','m','e','s','p','a','c','e','c',
    'h','o','b','j','e','c','t','h','r','o','w','b','o','o','l','e','a','n',
    'd','e','f','a','u','l','t','r','y','c','a','s','e','l','f','i','n','a',
    'l','i','s','t','a','t','i','c','l','o','n','e','w','c','o','n','s','t',
    'r','i','n','g','l','o','b','a','l','u','s','e','l','s','e','i','f','l',
    'o','a','t','v','a','r','r','a','y','A','N','D','I','E','c','h','o','U',
    'S','E','C','H','O','a','b','s','t','r','a','c','t','c','l','a','s','s',
    'c','o','n','t','i','n','u','e','n','d','i','f','u','n','c','t','i','o',
    'n','d','i','e','n','d','w','h','i','l','e','v','a','l','d','o','e','x',
    'i','t','g','o','t','o','i','m','p','l','e','m','e','n','t','s','i','n',
    'c','l','u','d','e','_','o','n','c','e','m','p','t','y','i','n','s','t',
    'a','n','c','e','o','f','i','n','t','e','r','f','a','c','e','n','d','f',
    'o','r','e','a','c','h','i','s','s','e','t','p','a','r','e','n','t','p',
    'r','i','v','a','t','e','p','r','o','t','e','c','t','e','d','p','u','b',
    'l','i','c','a','t','c','h','u','n','s','e','t','x','o','r','A','R','R',
    'A','Y','A','S','A','r','r','a','y','E','X','I','T','U','N','S','E','T',
    'X','O','R','b','r','e','a','k'
  };
  static const unsigned char aHash[151] = {
       0,   0,   4,  83,   0,  61,  39,  12,   0,  33,  77,   0,  48,
       0,   2,  65,  67,   0,   0,   0,  47,   0,   0,  40,   0,  15,
      74,   0,  51,   0,  76,   0,   0,  20,   0,   0,   0,  50,   0,
      80,  34,   0,  36,   0,   0,  64,  16,   0,   0,  17,   0,   1,
      19,  84,  66,   0,  43,  45,  78,   0,   0,  53,  56,   0,   0,
       0,  23,  49,   0,   0,  13,  31,  54,   7,   0,   0,  25,   0,
      72,  14,   0,  71,   0,  38,   6,   0,   0,   0,  73,   0,   0,
       3,   0,  41,   5,  52,  57,  32,   0,  60,  63,   0,  69,  82,
      30,   0,  79,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
       0,   0,   0,   0,   0,   0,   0,   0,   0,   0,  81,   0,   0,
      62,   0,  11,   0,   0,  58,   0,   0,   0,   0,  59,  75,   0,
       0,   0,   0,   0,   0,  35,  27,   0
  };
  static const unsigned char aNext[84] = {
       0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
       0,   0,   8,   0,   0,   0,  10,   0,   0,   0,   0,   0,   0,
       0,   0,   0,   0,  28,   0,   0,   0,   0,   0,   0,   0,   0,
       0,   0,   0,   0,   0,  44,   0,  18,   0,   0,   0,   0,   0,
       0,  46,   0,  29,   0,   0,   0,  22,   0,   0,   0,   0,  26,
       0,  21,  24,   0,   0,  68,   0,   0,   9,  37,   0,   0,   0,
      42,   0,   0,   0,  70,  55
  };
  static const unsigned char aLen[84] = {
       7,   9,   6,   5,   7,  12,   7,   2,  10,   7,   6,   9,   4,
       6,   5,   7,   4,   3,   7,   3,   4,   4,   5,   4,   6,   5,
       2,   3,   5,   6,   6,   3,   6,   4,   2,   5,   3,   5,   3,
       3,   4,   3,   4,   8,   5,   2,   8,   5,   8,   3,   8,   5,
       4,   2,   4,   4,  10,  12,   7,   5,  10,   9,   3,   6,  10,
       3,   7,   2,   5,   6,   7,   9,   6,   5,   5,   3,   5,   2,
       5,   4,   5,   3,   2,   5
  };
  static const sxu16 aOffset[84] = {
       0,   3,   6,  12,  14,  20,  20,  21,  31,  34,  39,  44,  52,
      55,  60,  65,  65,  70,  72,  78,  81,  83,  86,  90,  92,  97,
     100, 100, 103, 106, 111, 117, 119, 119, 123, 124, 129, 130, 135,
     137, 139, 143, 145, 149, 157, 159, 162, 169, 173, 181, 183, 186,
     190, 194, 196, 200, 204, 214, 214, 225, 230, 240, 240, 248, 248,
     251, 251, 252, 258, 263, 269, 276, 285, 290, 295, 300, 303, 308,
     310, 315, 319, 324, 325, 327
  };
  static const sxu32 aCode[84] = {
    PH7_TKWRD_EXTENDS,   PH7_TKWRD_ENDSWITCH,   PH7_TKWRD_SWITCH,    PH7_TKWRD_PRINT,   PH7_TKWRD_INT, 
    PH7_TKWRD_REQONCE,   PH7_TKWRD_REQUIRE,     PH7_TKWRD_SEQ,       PH7_TKWRD_ENDDEC,    PH7_TKWRD_DECLARE,   
    PH7_TKWRD_RETURN,    PH7_TKWRD_NAMESPACE,   PH7_TKWRD_ECHO,      PH7_TKWRD_OBJECT,    PH7_TKWRD_THROW, 
    PH7_TKWRD_BOOL,      PH7_TKWRD_BOOL,        PH7_TKWRD_AND,       PH7_TKWRD_DEFAULT,   PH7_TKWRD_TRY, 
    PH7_TKWRD_CASE,      PH7_TKWRD_SELF,        PH7_TKWRD_FINAL,     PH7_TKWRD_LIST,      PH7_TKWRD_STATIC,  
    PH7_TKWRD_CLONE,     PH7_TKWRD_SNE,         PH7_TKWRD_NEW,       PH7_TKWRD_CONST,     PH7_TKWRD_STRING,  
    PH7_TKWRD_GLOBAL,    PH7_TKWRD_USE,         PH7_TKWRD_ELIF,      PH7_TKWRD_ELSE,      PH7_TKWRD_IF,  
    PH7_TKWRD_FLOAT,     PH7_TKWRD_VAR,         PH7_TKWRD_ARRAY,     PH7_TKWRD_AND,       PH7_TKWRD_DIE, 
    PH7_TKWRD_ECHO,      PH7_TKWRD_USE,         PH7_TKWRD_ECHO,      PH7_TKWRD_ABSTRACT,  PH7_TKWRD_CLASS, 
    PH7_TKWRD_AS,        PH7_TKWRD_CONTINUE,    PH7_TKWRD_ENDIF,     PH7_TKWRD_FUNCTION,  PH7_TKWRD_DIE, 
    PH7_TKWRD_ENDWHILE,  PH7_TKWRD_WHILE,       PH7_TKWRD_EVAL,      PH7_TKWRD_DO,        PH7_TKWRD_EXIT,
    PH7_TKWRD_GOTO,      PH7_TKWRD_IMPLEMENTS,  PH7_TKWRD_INCONCE,   PH7_TKWRD_INCLUDE,   PH7_TKWRD_EMPTY, 
    PH7_TKWRD_INSTANCEOF,PH7_TKWRD_INTERFACE,   PH7_TKWRD_INT,       PH7_TKWRD_ENDFOR,    PH7_TKWRD_END4EACH,    
    PH7_TKWRD_FOR,       PH7_TKWRD_FOREACH,     PH7_TKWRD_OR,        PH7_TKWRD_ISSET,     PH7_TKWRD_PARENT,  
    PH7_TKWRD_PRIVATE,   PH7_TKWRD_PROTECTED,   PH7_TKWRD_PUBLIC,    PH7_TKWRD_CATCH,     PH7_TKWRD_UNSET, 
    PH7_TKWRD_XOR,       PH7_TKWRD_ARRAY,       PH7_TKWRD_AS,        PH7_TKWRD_ARRAY,     PH7_TKWRD_EXIT,
    PH7_TKWRD_UNSET,     PH7_TKWRD_XOR,         PH7_TKWRD_OR,        PH7_TKWRD_BREAK 
  };
  int h, i;
  if( n<2 ) return PH7_TK_ID;
  h = (((int)z[0]*4) ^ ((int)z[n-1]*3) ^ n) % 151;
  for(i=((int)aHash[h])-1; i>=0; i=((int)aNext[i])-1){
    if( (int)aLen[i]==n && SyMemcmp(&zText[aOffset[i]],z,n)==0 ){
       /* PH7_TKWRD_EXTENDS */
       /* PH7_TKWRD_ENDSWITCH */
       /* PH7_TKWRD_SWITCH */
       /* PH7_TKWRD_PRINT */
       /* PH7_TKWRD_INT */
       /* PH7_TKWRD_REQONCE */
       /* PH7_TKWRD_REQUIRE */
       /* PH7_TKWRD_SEQ */
       /* PH7_TKWRD_ENDDEC */
       /* PH7_TKWRD_DECLARE */
       /* PH7_TKWRD_RETURN */
       /* PH7_TKWRD_NAMESPACE */
       /* PH7_TKWRD_ECHO */
       /* PH7_TKWRD_OBJECT */
       /* PH7_TKWRD_THROW */
       /* PH7_TKWRD_BOOL */
       /* PH7_TKWRD_BOOL */
       /* PH7_TKWRD_AND */
       /* PH7_TKWRD_DEFAULT */
       /* PH7_TKWRD_TRY */
       /* PH7_TKWRD_CASE */
       /* PH7_TKWRD_SELF */
       /* PH7_TKWRD_FINAL */
       /* PH7_TKWRD_LIST */
       /* PH7_TKWRD_STATIC */
       /* PH7_TKWRD_CLONE */
       /* PH7_TKWRD_SNE */
       /* PH7_TKWRD_NEW */
       /* PH7_TKWRD_CONST */
       /* PH7_TKWRD_STRING */
       /* PH7_TKWRD_GLOBAL */
       /* PH7_TKWRD_USE */
       /* PH7_TKWRD_ELIF */
       /* PH7_TKWRD_ELSE */
       /* PH7_TKWRD_IF */
       /* PH7_TKWRD_FLOAT */
       /* PH7_TKWRD_VAR */
       /* PH7_TKWRD_ARRAY */
       /* PH7_TKWRD_AND */
       /* PH7_TKWRD_DIE */
       /* PH7_TKWRD_ECHO */
       /* PH7_TKWRD_USE */
       /* PH7_TKWRD_ECHO */
       /* PH7_TKWRD_ABSTRACT */
       /* PH7_TKWRD_CLASS */
       /* PH7_TKWRD_AS */
       /* PH7_TKWRD_CONTINUE */
       /* PH7_TKWRD_ENDIF */
       /* PH7_TKWRD_FUNCTION */
       /* PH7_TKWRD_DIE */
       /* PH7_TKWRD_ENDWHILE */
       /* PH7_TKWRD_WHILE */
       /* PH7_TKWRD_EVAL */
       /* PH7_TKWRD_DO */
       /* PH7_TKWRD_EXIT */
       /* PH7_TKWRD_GOTO */
       /* PH7_TKWRD_IMPLEMENTS */
       /* PH7_TKWRD_INCONCE */
       /* PH7_TKWRD_INCLUDE */
       /* PH7_TKWRD_EMPTY */
       /* PH7_TKWRD_INSTANCEOF */
       /* PH7_TKWRD_INTERFACE */
       /* PH7_TKWRD_INT */
       /* PH7_TKWRD_ENDFOR */
       /* PH7_TKWRD_END4EACH */
       /* PH7_TKWRD_FOR */
       /* PH7_TKWRD_FOREACH */
       /* PH7_TKWRD_OR */
       /* PH7_TKWRD_ISSET */
       /* PH7_TKWRD_PARENT */
       /* PH7_TKWRD_PRIVATE */
       /* PH7_TKWRD_PROTECTED */
       /* PH7_TKWRD_PUBLIC */
       /* PH7_TKWRD_CATCH */
       /* PH7_TKWRD_UNSET */
       /* PH7_TKWRD_XOR */
       /* PH7_TKWRD_ARRAY */
       /* PH7_TKWRD_AS */
       /* PH7_TKWRD_ARRAY */
       /* PH7_TKWRD_EXIT */
       /* PH7_TKWRD_UNSET */
       /* PH7_TKWRD_XOR */
       /* PH7_TKWRD_OR */
       /* PH7_TKWRD_BREAK */
      return aCode[i];
    }
  }
  return PH7_TK_ID;
}
/* --- End of Automatically generated code --- */
/*
 * Extract a heredoc/nowdoc text from a raw PHP input.
 * According to the PHP language reference manual:
 *  A third way to delimit strings is the heredoc syntax: <<<. After this operator, an identifier
 *  is provided, then a newline. The string itself follows, and then the same identifier again
 *  to close the quotation.
 *  The closing identifier must begin in the first column of the line. Also, the identifier must 
 *  follow the same naming rules as any other label in PHP: it must contain only alphanumeric 
 *  characters and underscores, and must start with a non-digit character or underscore. 
 *  Heredoc text behaves just like a double-quoted string, without the double quotes.
 *  This means that quotes in a heredoc do not need to be escaped, but the escape codes listed
 *  above can still be used. Variables are expanded, but the same care must be taken when expressing
 *  complex variables inside a heredoc as with strings. 
 *  Nowdocs are to single-quoted strings what heredocs are to double-quoted strings.
 *  A nowdoc is specified similarly to a heredoc, but no parsing is done inside a nowdoc.
 *  The construct is ideal for embedding PHP code or other large blocks of text without the need
 *  for escaping. It shares some features in common with the SGML <![CDATA[ ]]> construct, in that
 *  it declares a block of text which is not for parsing.
 *  A nowdoc is identified with the same <<< sequence used for heredocs, but the identifier which follows
 *  is enclosed in single quotes, e.g. <<<'EOT'. All the rules for heredoc identifiers also apply to nowdoc
 *  identifiers, especially those regarding the appearance of the closing identifier. 
 * Symisc Extension:
 * The closing delimiter can now start with a digit or undersocre or it can be an UTF-8 stream.
 * Example:
 *  <<<123
 *    HEREDOC Here
 * 123
 *  or
 *  <<<___
 *   HEREDOC Here
 *  ___
 */
static sxi32 LexExtractHeredoc(SyStream *pStream,SyToken *pToken)
{
	const unsigned char *zIn  = pStream->zText;
	const unsigned char *zEnd = pStream->zEnd;
	const unsigned char *zPtr;
	sxu8 bNowDoc = FALSE;
	SyString sDelim;
	SyString sStr;
	/* Jump leading white spaces */
	while( zIn < zEnd && zIn[0] < 0xc0 && SyisSpace(zIn[0]) && zIn[0] != '\n' ){
		zIn++;
	}
	if( zIn >= zEnd ){
		/* A simple symbol,return immediately */
		return SXERR_CONTINUE;
	}
	if( zIn[0] == '\'' || zIn[0] == '"' ){
		/* Make sure we are dealing with a nowdoc */
		bNowDoc =  zIn[0] == '\'' ? TRUE : FALSE;
		zIn++;
	}
	if( zIn[0] < 0xc0 && !SyisAlphaNum(zIn[0]) && zIn[0] != '_' ){
		/* Invalid delimiter,return immediately */
		return SXERR_CONTINUE;
	}
	/* Isolate the identifier */
	sDelim.zString = (const char *)zIn;
	for(;;){
		zPtr = zIn;
		/* Skip alphanumeric stream */
		while( zPtr < zEnd && zPtr[0] < 0xc0 && (SyisAlphaNum(zPtr[0]) || zPtr[0] == '_') ){
			zPtr++;
		}
		if( zPtr < zEnd && zPtr[0] >= 0xc0 ){
			zPtr++;
			/* UTF-8 stream */
			while( zPtr < zEnd && ((zPtr[0] & 0xc0) == 0x80) ){
				zPtr++;
			}
		}
		if( zPtr == zIn ){
			/* Not an UTF-8 or alphanumeric stream */
			break;
		}
		/* Synchronize pointers */
		zIn = zPtr;
	}
	/* Get the identifier length */
	sDelim.nByte = (sxu32)((const char *)zIn-sDelim.zString);
	if( zIn[0] == '"' || (bNowDoc && zIn[0] == '\'') ){
		/* Jump the trailing single quote */
		zIn++;
	}
	/* Jump trailing white spaces */
	while( zIn < zEnd && zIn[0] < 0xc0 && SyisSpace(zIn[0]) && zIn[0] != '\n' ){
		zIn++;
	}
	if( sDelim.nByte <= 0 || zIn >= zEnd || zIn[0] != '\n' ){
		/* Invalid syntax */
		return SXERR_CONTINUE;
	}
	pStream->nLine++; /* Increment line counter */
	zIn++;
	/* Isolate the delimited string */
	sStr.zString = (const char *)zIn;
	/* Go and found the closing delimiter */
	for(;;){
		/* Synchronize with the next line */
		while( zIn < zEnd && zIn[0] != '\n' ){
			zIn++;
		}
		if( zIn >= zEnd ){
			/* End of the input reached, break immediately */
			pStream->zText = pStream->zEnd;
			break;
		}
		pStream->nLine++; /* Increment line counter */
		zIn++;
		if( (sxu32)(zEnd - zIn) >= sDelim.nByte && SyMemcmp((const void *)sDelim.zString,(const void *)zIn,sDelim.nByte) == 0 ){
			zPtr = &zIn[sDelim.nByte];
			while( zPtr < zEnd && zPtr[0] < 0xc0 && SyisSpace(zPtr[0]) && zPtr[0] != '\n' ){
				zPtr++;
			}
			if( zPtr >= zEnd ){
				/* End of input */
				pStream->zText = zPtr;
				break;
			}
			if( zPtr[0] == ';' ){
				const unsigned char *zCur = zPtr;
				zPtr++;
				while( zPtr < zEnd && zPtr[0] < 0xc0 && SyisSpace(zPtr[0]) && zPtr[0] != '\n' ){
					zPtr++;
				}
				if( zPtr >= zEnd || zPtr[0] == '\n' ){
					/* Closing delimiter found,break immediately */
					pStream->zText = zCur; /* Keep the semi-colon */
					break;
				}
			}else if( zPtr[0] == '\n' ){
				/* Closing delimiter found,break immediately */
				pStream->zText = zPtr; /* Synchronize with the stream cursor */
				break;
			}
			/* Synchronize pointers and continue searching */
			zIn = zPtr;
		}
	} /* For(;;) */
	/* Get the delimited string length */
	sStr.nByte = (sxu32)((const char *)zIn-sStr.zString);
	/* Record token type and length */
	pToken->nType = bNowDoc ? PH7_TK_NOWDOC : PH7_TK_HEREDOC;
	SyStringDupPtr(&pToken->sData,&sStr);
	/* Remove trailing white spaces */
	SyStringRightTrim(&pToken->sData);
	/* All done */
	return SXRET_OK;
}
/*
 * Tokenize a raw PHP input.
 * This is the public tokenizer called by most code generator routines. 
 */
PH7_PRIVATE sxi32 PH7_TokenizePHP(const char *zInput,sxu32 nLen,sxu32 nLineStart,SySet *pOut)
{
	SyLex sLexer;
	sxi32 rc;
	/* Initialize the lexer */
	rc = SyLexInit(&sLexer,&(*pOut),TokenizePHP,0);
	if( rc != SXRET_OK ){
		return rc;
	}
	sLexer.sStream.nLine = nLineStart;
	/* Tokenize input */
	rc = SyLexTokenizeInput(&sLexer,zInput,nLen,0,0,0);
	/* Release the lexer */
	SyLexRelease(&sLexer);
	/* Tokenization result */
	return rc;
}
/*
 * High level public tokenizer.
 *  Tokenize the input into PHP tokens and raw tokens [i.e: HTML,XML,Raw text...].
 * According to the PHP language reference manual
 *   When PHP parses a file, it looks for opening and closing tags, which tell PHP
 *   to start and stop interpreting the code between them. Parsing in this manner allows
 *   PHP to be embedded in all sorts of different documents, as everything outside of a pair
 *   of opening and closing tags is ignored by the PHP parser. Most of the time you will see
 *   PHP embedded in HTML documents, as in this example. 
 *   <?php echo 'While this is going to be parsed.'; ?>
 *   <p>This will also be ignored.</p>
 *   You can also use more advanced structures:
 *   Example #1 Advanced escaping
 * <?php
 * if ($expression) {
 *   ?>
 *   <strong>This is true.</strong>
 *   <?php
 * } else {
 *   ?>
 *   <strong>This is false.</strong>
 *   <?php
 * }
 * ?>
 * This works as expected, because when PHP hits the ?> closing tags, it simply starts outputting
 * whatever it finds (except for an immediately following newline - see instruction separation ) until it hits
 * another opening tag. The example given here is contrived, of course, but for outputting large blocks of text
 * dropping out of PHP parsing mode is generally more efficient than sending all of the text through echo() or print().
 * There are four different pairs of opening and closing tags which can be used in PHP. Three of those, <?php ?> 
 * <script language="php"> </script>  and <? ?> are always available. The other two are short tags and ASP style
 * tags, and can be turned on and off from the php.ini configuration file. As such, while some people find short tags
 * and ASP style tags convenient, they are less portable, and generally not recommended.
 * Note:
 * Also note that if you are embedding PHP within XML or XHTML you will need to use the <?php ?> tags to remain
 * compliant with standards.
 * Example #2 PHP Opening and Closing Tags
 * 1.  <?php echo 'if you want to serve XHTML or XML documents, do it like this'; ?>
 * 2.  <script language="php">
 *       echo 'some editors (like FrontPage) don\'t
 *             like processing instructions';
 *   </script>
 *
 * 3.  <? echo 'this is the simplest, an SGML processing instruction'; ?>
 *   <?= expression ?> This is a shortcut for "<? echo expression ?>"
 */
PH7_PRIVATE sxi32 PH7_TokenizeRawText(const char *zInput,sxu32 nLen,SySet *pOut)
{
	const char *zEnd = &zInput[nLen];
	const char *zIn  = zInput;
	const char *zCur,*zCurEnd;
	SyString sCtag = { 0, 0 };     /* Closing tag */
	SyToken sToken;
	SyString sDoc;
	sxu32 nLine;
	sxi32 iNest;
	sxi32 rc;
	/* Tokenize the input into PHP tokens and raw tokens */
	nLine = 1;
	zCur = zCurEnd   = 0; /* Prevent compiler warning */
	sToken.pUserData = 0;
	iNest = 0;
	sDoc.nByte = 0;
	sDoc.zString = ""; /* cc warning */
	for(;;){
		if( zIn >= zEnd ){
			/* End of input reached */
			break;
		}
		sToken.nLine = nLine;
		zCur = zIn;
		zCurEnd = 0;
		while( zIn < zEnd ){
			 if( zIn[0] == '<' ){
				const char *zTmp = zIn; /* End of raw input marker */
				zIn++;
				if( zIn < zEnd ){
					if( zIn[0] == '?' ){
						zIn++;
						if( (sxu32)(zEnd - zIn) >= sizeof("php")-1 &&  SyStrnicmp(zIn,"php",sizeof("php")-1) == 0 ){
							/* opening tag: <?php */ 
							zIn += sizeof("php")-1;
						}
						/* Look for the closing tag '?>' */
						SyStringInitFromBuf(&sCtag,"?>",sizeof("?>")-1);
						zCurEnd = zTmp;
						break;
					}
				}
			}else{
				if( zIn[0] == '\n' ){
					nLine++;
				}
				zIn++;
			 }
		} /* While(zIn < zEnd) */
		if( zCurEnd == 0 ){
			zCurEnd = zIn;
		}
		/* Save the raw token */
		SyStringInitFromBuf(&sToken.sData,zCur,zCurEnd - zCur);
		sToken.nType = PH7_TOKEN_RAW;
		rc = SySetPut(&(*pOut),(const void *)&sToken);
		if( rc != SXRET_OK ){
			return rc;
		}
		if( zIn >= zEnd ){
			break;
		}
		/* Ignore leading white space */
		while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
			if( zIn[0] == '\n' ){
				nLine++;
			}
			zIn++;
		}
		/* Delimit the PHP chunk */
		sToken.nLine = nLine;
		zCur = zIn;
		while( (sxu32)(zEnd - zIn) >= sCtag.nByte ){
			const char *zPtr;
			if( SyMemcmp(zIn,sCtag.zString,sCtag.nByte) == 0 && iNest < 1 ){
				break;
			}
			for(;;){
				if( zIn[0] != '/' || (zIn[1] != '*' && zIn[1] != '/') /* && sCtag.nByte >= 2 */ ){
					break;
				}
				zIn += 2;
				if( zIn[-1] == '/' ){
					/* Inline comment */
					while( zIn < zEnd && zIn[0] != '\n' ){
						zIn++;
					}
					if( zIn >= zEnd ){
						zIn--;
					}
				}else{
					/* Block comment */
					while( (sxu32)(zEnd-zIn) >= sizeof("*/") - 1 ){
						if( zIn[0] == '*' && zIn[1] == '/' ){
							zIn += 2;
							break;
						}
						if( zIn[0] == '\n' ){
							nLine++;
						}
						zIn++;
					}
				}
			}
			if( zIn[0] == '\n' ){
				nLine++;
				if( iNest > 0 ){
					zIn++;
					while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) && zIn[0] != '\n' ){
						zIn++;
					}
					zPtr = zIn;
					while( zIn < zEnd ){
						if( (unsigned char)zIn[0] >= 0xc0 ){
							/* UTF-8 stream */
							zIn++;
							SX_JMP_UTF8(zIn,zEnd);
						}else if( !SyisAlphaNum(zIn[0]) && zIn[0] != '_' ){
							break;
						}else{
							zIn++;
						}
					}
					if( (sxu32)(zIn - zPtr) == sDoc.nByte && SyMemcmp(sDoc.zString,zPtr,sDoc.nByte) == 0 ){
						iNest = 0;
					}
					continue;
				}
			}else if ( (sxu32)(zEnd - zIn) >= sizeof("<<<") && zIn[0] == '<' && zIn[1] == '<' && zIn[2] == '<' && iNest < 1){
				zIn += sizeof("<<<")-1;
				while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) && zIn[0] != '\n' ){
					zIn++;
				}
				if( zIn[0] == '"' || zIn[0] == '\'' ){
					zIn++;
				}
				zPtr = zIn;
				while( zIn < zEnd ){
					if( (unsigned char)zIn[0] >= 0xc0 ){
						/* UTF-8 stream */
						zIn++;
						SX_JMP_UTF8(zIn,zEnd);
					}else if( !SyisAlphaNum(zIn[0]) && zIn[0] != '_' ){
						break;
					}else{
						zIn++;
					}
				}
				SyStringInitFromBuf(&sDoc,zPtr,zIn-zPtr);
				SyStringFullTrim(&sDoc);
				if( sDoc.nByte > 0 ){
					iNest++;
				}
				continue;
			}
			zIn++;
			
			if ( zIn >= zEnd )
				break;
		}
		if( (sxu32)(zEnd - zIn) < sCtag.nByte ){
			zIn = zEnd;
		}
		if( zCur < zIn ){
			/* Save the PHP chunk for later processing */
			sToken.nType = PH7_TOKEN_PHP;
			SyStringInitFromBuf(&sToken.sData,zCur,zIn-zCur);
			SyStringRightTrim(&sToken.sData); /* Trim trailing white spaces */
			rc = SySetPut(&(*pOut),(const void *)&sToken);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
		if( zIn < zEnd ){
			/* Jump the trailing closing tag */
			zIn += sCtag.nByte;
		}
	} /* For(;;) */
	
 	return SXRET_OK;
}

/*
 * ----------------------------------------------------------
 * File: hashmap.c
 * MD5: cf4287c2602a9c97df208364cb9be084
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: hashmap.c v3.5 FreeBSD 2012-08-07 08:29 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/* This file implement generic hashmaps known as 'array' in the PHP world */
/* Allowed node types */
#define HASHMAP_INT_NODE   1  /* Node with an int [i.e: 64-bit integer] key */
#define HASHMAP_BLOB_NODE  2  /* Node with a string/BLOB key */
/* Node control flags */
#define HASHMAP_NODE_FOREIGN_OBJ 0x001 /* Node hold a reference to a foreign ph7_value
                                        * [i.e: array(&var)/$a[] =& $var ]
										*/
/*
 * Default hash function for int [i.e; 64-bit integer] keys.
 */
static sxu32 IntHash(sxi64 iKey)
{
	return (sxu32)(iKey ^ (iKey << 8) ^ (iKey >> 8));
}
/*
 * Default hash function for string/BLOB keys.
 */
static sxu32 BinHash(const void *pSrc,sxu32 nLen)
{
	register unsigned char *zIn = (unsigned char *)pSrc;
	unsigned char *zEnd;
	sxu32 nH = 5381;
	zEnd = &zIn[nLen];
	for(;;){
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
		if( zIn >= zEnd ){ break; } nH = nH * 33 + zIn[0] ; zIn++;
	}	
	return nH;
}
/*
 * Return the total number of entries in a given hashmap.
 * If bRecurisve is set to TRUE then recurse on hashmap entries.
 * If the nesting limit is reached,this function abort immediately. 
 */
static sxi64 HashmapCount(ph7_hashmap *pMap,int bRecursive,int iRecCount)
{
	sxi64 iCount = 0;
	if( !bRecursive ){
		iCount = pMap->nEntry;
	}else{
		/* Recursive hashmap walk */
		ph7_hashmap_node *pEntry = pMap->pLast;
		ph7_value *pElem;
		sxu32 n = 0;
		for(;;){
			if( n >= pMap->nEntry ){
				break;
			}
			/* Point to the element value */
			pElem = (ph7_value *)SySetAt(&pMap->pVm->aMemObj,pEntry->nValIdx);
			if( pElem ){
				if( pElem->iFlags & MEMOBJ_HASHMAP ){
					if( iRecCount > 31 ){
						/* Nesting limit reached */
						return iCount;
					}
					/* Recurse */
					iRecCount++;
					iCount += HashmapCount((ph7_hashmap *)pElem->x.pOther,TRUE,iRecCount);
					iRecCount--;
				}
			}
			/* Point to the next entry */
			pEntry = pEntry->pNext;
			++n;
		}
		/* Update count */
		iCount += pMap->nEntry;
	}
	return iCount;
}
/*
 * Allocate a new hashmap node with a 64-bit integer key.
 * If something goes wrong [i.e: out of memory],this function return NULL.
 * Otherwise a fresh [ph7_hashmap_node] instance is returned.
 */
static ph7_hashmap_node * HashmapNewIntNode(ph7_hashmap *pMap,sxi64 iKey,sxu32 nHash,sxu32 nValIdx)
{
	ph7_hashmap_node *pNode;
	/* Allocate a new node */
	pNode = (ph7_hashmap_node *)SyMemBackendPoolAlloc(&pMap->pVm->sAllocator,sizeof(ph7_hashmap_node));
	if( pNode == 0 ){
		return 0;
	}
	/* Zero the stucture */
	SyZero(pNode,sizeof(ph7_hashmap_node));
	/* Fill in the structure */
	pNode->pMap  = &(*pMap);
	pNode->iType = HASHMAP_INT_NODE;
	pNode->nHash = nHash;
	pNode->xKey.iKey = iKey;
	pNode->nValIdx  = nValIdx;
	return pNode;
}
/*
 * Allocate a new hashmap node with a BLOB key.
 * If something goes wrong [i.e: out of memory],this function return NULL.
 * Otherwise a fresh [ph7_hashmap_node] instance is returned.
 */
static ph7_hashmap_node * HashmapNewBlobNode(ph7_hashmap *pMap,const void *pKey,sxu32 nKeyLen,sxu32 nHash,sxu32 nValIdx)
{
	ph7_hashmap_node *pNode;
	/* Allocate a new node */
	pNode = (ph7_hashmap_node *)SyMemBackendPoolAlloc(&pMap->pVm->sAllocator,sizeof(ph7_hashmap_node));
	if( pNode == 0 ){
		return 0;
	}
	/* Zero the stucture */
	SyZero(pNode,sizeof(ph7_hashmap_node));
	/* Fill in the structure */
	pNode->pMap  = &(*pMap);
	pNode->iType = HASHMAP_BLOB_NODE;
	pNode->nHash = nHash;
	SyBlobInit(&pNode->xKey.sKey,&pMap->pVm->sAllocator);
	SyBlobAppend(&pNode->xKey.sKey,pKey,nKeyLen);
	pNode->nValIdx = nValIdx;
	return pNode;
}
/*
 * link a hashmap node to the given bucket index (last argument to this function).
 */
static void HashmapNodeLink(ph7_hashmap *pMap,ph7_hashmap_node *pNode,sxu32 nBucketIdx)
{
	/* Link */
	if( pMap->apBucket[nBucketIdx] != 0 ){
		pNode->pNextCollide = pMap->apBucket[nBucketIdx];
		pMap->apBucket[nBucketIdx]->pPrevCollide = pNode;
	}
	pMap->apBucket[nBucketIdx] = pNode;
	/* Link to the map list */
	if( pMap->pFirst == 0 ){
		pMap->pFirst = pMap->pLast = pNode;
		/* Point to the first inserted node */
		pMap->pCur = pNode;
	}else{
		MACRO_LD_PUSH(pMap->pLast,pNode);
	}
	++pMap->nEntry;
}
/*
 * Unlink a node from the hashmap.
 * If the node count reaches zero then release the whole hash-bucket.
 */
PH7_PRIVATE void PH7_HashmapUnlinkNode(ph7_hashmap_node *pNode,int bRestore)
{
	ph7_hashmap *pMap = pNode->pMap;
	ph7_vm *pVm = pMap->pVm;
	/* Unlink from the corresponding bucket */
	if( pNode->pPrevCollide == 0 ){
		pMap->apBucket[pNode->nHash & (pMap->nSize - 1)] = pNode->pNextCollide;
	}else{
		pNode->pPrevCollide->pNextCollide = pNode->pNextCollide;
	}
	if( pNode->pNextCollide ){
		pNode->pNextCollide->pPrevCollide = pNode->pPrevCollide;
	}
	if( pMap->pFirst == pNode ){
		pMap->pFirst = pNode->pPrev;
	}
	if( pMap->pCur == pNode ){
		/* Advance the node cursor */
		pMap->pCur = pMap->pCur->pPrev; /* Reverse link */
	}
	/* Unlink from the map list */
	MACRO_LD_REMOVE(pMap->pLast,pNode);
	if( bRestore ){
		/* Remove the ph7_value associated with this node from the reference table */
		PH7_VmRefObjRemove(pVm,pNode->nValIdx,0,pNode);
		/* Restore to the freelist */
		if( (pNode->iFlags & HASHMAP_NODE_FOREIGN_OBJ) == 0 ){
			PH7_VmUnsetMemObj(pVm,pNode->nValIdx,FALSE);
		}
	}
	if( pNode->iType == HASHMAP_BLOB_NODE ){
		SyBlobRelease(&pNode->xKey.sKey);
	}
	SyMemBackendPoolFree(&pVm->sAllocator,pNode);
	pMap->nEntry--;
	if( pMap->nEntry < 1 && pMap != pVm->pGlobal ){
		/* Free the hash-bucket */
		SyMemBackendFree(&pVm->sAllocator,pMap->apBucket);
		pMap->apBucket = 0;
		pMap->nSize = 0;
		pMap->pFirst = pMap->pLast = pMap->pCur = 0;
	}
}
#define HASHMAP_FILL_FACTOR 3
/*
 * Grow the hash-table and rehash all entries.
 */
static sxi32 HashmapGrowBucket(ph7_hashmap *pMap)
{
	if( pMap->nEntry >= pMap->nSize * HASHMAP_FILL_FACTOR ){
		ph7_hashmap_node **apOld = pMap->apBucket;
		ph7_hashmap_node *pEntry,**apNew;
		sxu32 nNew = pMap->nSize << 1;
		sxu32 nBucket;
		sxu32 n;
		if( nNew < 1 ){
			nNew = 16;
		}
		/* Allocate a new bucket */
		apNew = (ph7_hashmap_node **)SyMemBackendAlloc(&pMap->pVm->sAllocator,nNew * sizeof(ph7_hashmap_node *));
		if( apNew == 0 ){
			if( pMap->nSize < 1 ){
				return SXERR_MEM; /* Fatal */
			}
			/* Not so fatal here,simply a performance hit */
			return SXRET_OK;
		}
		/* Zero the table */
		SyZero((void *)apNew,nNew * sizeof(ph7_hashmap_node *));
		/* Reflect the change */
		pMap->apBucket = apNew;
		pMap->nSize = nNew;
		if( apOld == 0 ){
			/* First allocated table [i.e: no entry],return immediately */
			return SXRET_OK;
		}
		/* Rehash old entries */
		pEntry = pMap->pFirst;
		n = 0;
		for( ;; ){
			if( n >= pMap->nEntry ){
				break;
			}
			/* Clear the old collision link */
			pEntry->pNextCollide = pEntry->pPrevCollide = 0;
			/* Link to the new bucket */
			nBucket = pEntry->nHash & (nNew - 1);
			if( pMap->apBucket[nBucket] != 0 ){
				pEntry->pNextCollide = pMap->apBucket[nBucket];
				pMap->apBucket[nBucket]->pPrevCollide = pEntry;
			}
			pMap->apBucket[nBucket] = pEntry;
			/* Point to the next entry */
			pEntry = pEntry->pPrev; /* Reverse link */
			n++;
		}
		/* Free the old table */
		SyMemBackendFree(&pMap->pVm->sAllocator,(void *)apOld);
	}
	return SXRET_OK;
}
/*
 * Insert a 64-bit integer key and it's associated value (if any) in the given
 * hashmap.
 */
static sxi32 HashmapInsertIntKey(ph7_hashmap *pMap,sxi64 iKey,ph7_value *pValue,sxu32 nRefIdx,int isForeign)
{
	ph7_hashmap_node *pNode;
	sxu32 nIdx;
	sxu32 nHash;
	sxi32 rc;
	if( !isForeign ){
		ph7_value *pObj;
		/* Reserve a ph7_value for the value */
		pObj = PH7_ReserveMemObj(pMap->pVm);
		if( pObj == 0 ){
			return SXERR_MEM;
		}
		if( pValue ){
			/* Duplicate the value */
			PH7_MemObjStore(pValue,pObj);
		}
		nIdx = pObj->nIdx;
	}else{
		nIdx = nRefIdx;
	}
	/* Hash the key */
	nHash = pMap->xIntHash(iKey);
	/* Allocate a new int node */
	pNode = HashmapNewIntNode(&(*pMap),iKey,nHash,nIdx);
	if( pNode == 0 ){
		return SXERR_MEM;
	}
	if( isForeign ){
		/* Mark as a foregin entry */
		pNode->iFlags |= HASHMAP_NODE_FOREIGN_OBJ;
	}
	/* Make sure the bucket is big enough to hold the new entry */
	rc = HashmapGrowBucket(&(*pMap));
	if( rc != SXRET_OK ){
		SyMemBackendPoolFree(&pMap->pVm->sAllocator,pNode);
		return rc;
	}
	/* Perform the insertion */
	HashmapNodeLink(&(*pMap),pNode,nHash & (pMap->nSize - 1));
	/* Install in the reference table */
	PH7_VmRefObjInstall(pMap->pVm,nIdx,0,pNode,0);
	/* All done */
	return SXRET_OK;
}
/*
 * Insert a BLOB key and it's associated value (if any) in the given
 * hashmap.
 */
static sxi32 HashmapInsertBlobKey(ph7_hashmap *pMap,const void *pKey,sxu32 nKeyLen,ph7_value *pValue,sxu32 nRefIdx,int isForeign)
{
	ph7_hashmap_node *pNode;
	sxu32 nHash;
	sxu32 nIdx;
	sxi32 rc;
	if( !isForeign ){
		ph7_value *pObj;
		/* Reserve a ph7_value for the value */
		pObj = PH7_ReserveMemObj(pMap->pVm);
		if( pObj == 0 ){
			return SXERR_MEM;
		}
		if( pValue ){
			/* Duplicate the value */
			PH7_MemObjStore(pValue,pObj);
		}
		nIdx = pObj->nIdx;
	}else{
		nIdx = nRefIdx;
	}
	/* Hash the key */
	nHash = pMap->xBlobHash(pKey,nKeyLen);
	/* Allocate a new blob node */
	pNode = HashmapNewBlobNode(&(*pMap),pKey,nKeyLen,nHash,nIdx);
	if( pNode == 0 ){
		return SXERR_MEM;
	}
	if( isForeign ){
		/* Mark as a foregin entry */
		pNode->iFlags |= HASHMAP_NODE_FOREIGN_OBJ;
	}
	/* Make sure the bucket is big enough to hold the new entry */
	rc = HashmapGrowBucket(&(*pMap));
	if( rc != SXRET_OK ){
		SyMemBackendPoolFree(&pMap->pVm->sAllocator,pNode);
		return rc;
	}
	/* Perform the insertion */
	HashmapNodeLink(&(*pMap),pNode,nHash & (pMap->nSize - 1));
	/* Install in the reference table */
	PH7_VmRefObjInstall(pMap->pVm,nIdx,0,pNode,0);
	/* All done */
	return SXRET_OK;
}
/*
 * Check if a given 64-bit integer key exists in the given hashmap.
 * Write a pointer to the target node on success. Otherwise
 * SXERR_NOTFOUND is returned on failure.
 */
static sxi32 HashmapLookupIntKey(
	ph7_hashmap *pMap,         /* Target hashmap */
	sxi64 iKey,                /* lookup key */
	ph7_hashmap_node **ppNode  /* OUT: target node on success */
	)
{
	ph7_hashmap_node *pNode;
	sxu32 nHash;
	if( pMap->nEntry < 1 ){
		/* Don't bother hashing,there is no entry anyway */
		return SXERR_NOTFOUND;
	}
	/* Hash the key first */
	nHash = pMap->xIntHash(iKey);
	/* Point to the appropriate bucket */
	pNode = pMap->apBucket[nHash & (pMap->nSize - 1)];
	/* Perform the lookup */
	for(;;){
		if( pNode == 0 ){
			break;
		}
		if( pNode->iType == HASHMAP_INT_NODE
			&& pNode->nHash == nHash
			&& pNode->xKey.iKey == iKey ){
				/* Node found */
				if( ppNode ){
					*ppNode = pNode;
				}
				return SXRET_OK;
		}
		/* Follow the collision link */
		pNode = pNode->pNextCollide;
	}
	/* No such entry */
	return SXERR_NOTFOUND;
}
/*
 * Check if a given BLOB key exists in the given hashmap.
 * Write a pointer to the target node on success. Otherwise
 * SXERR_NOTFOUND is returned on failure.
 */
static sxi32 HashmapLookupBlobKey(
	ph7_hashmap *pMap,          /* Target hashmap */
	const void *pKey,           /* Lookup key */
	sxu32 nKeyLen,              /* Key length in bytes */
	ph7_hashmap_node **ppNode   /* OUT: target node on success */
	)
{
	ph7_hashmap_node *pNode;
	sxu32 nHash;
	if( pMap->nEntry < 1 ){
		/* Don't bother hashing,there is no entry anyway */
		return SXERR_NOTFOUND;
	}
	/* Hash the key first */
	nHash = pMap->xBlobHash(pKey,nKeyLen);
	/* Point to the appropriate bucket */
	pNode = pMap->apBucket[nHash & (pMap->nSize - 1)];
	/* Perform the lookup */
	for(;;){
		if( pNode == 0 ){
			break;
		}
		if( pNode->iType == HASHMAP_BLOB_NODE 
			&& pNode->nHash == nHash
			&& SyBlobLength(&pNode->xKey.sKey) == nKeyLen 
			&& SyMemcmp(SyBlobData(&pNode->xKey.sKey),pKey,nKeyLen) == 0 ){
				/* Node found */
				if( ppNode ){
					*ppNode = pNode;
				}
				return SXRET_OK;
		}
		/* Follow the collision link */
		pNode = pNode->pNextCollide;
	}
	/* No such entry */
	return SXERR_NOTFOUND;
}
/*
 * Check if the given BLOB key looks like a decimal number. 
 * Retrurn TRUE on success.FALSE otherwise.
 */
static int HashmapIsIntKey(SyBlob *pKey)
{
	const char *zIn  = (const char *)SyBlobData(pKey);
	const char *zEnd = &zIn[SyBlobLength(pKey)];
	if( (int)(zEnd-zIn) > 1 && zIn[0] == '0' ){
		/* Octal not decimal number */
		return FALSE;
	}
	if( (zIn[0] == '-' || zIn[0] == '+') && &zIn[1] < zEnd ){
		zIn++;
	}
	for(;;){
		if( zIn >= zEnd ){
			return TRUE;
		}
		if( (unsigned char)zIn[0] >= 0xc0 /* UTF-8 stream */  || !SyisDigit(zIn[0]) ){
			break;
		}
		zIn++;
	}
	/* Key does not look like a decimal number */
	return FALSE;
}
/*
 * Check if a given key exists in the given hashmap.
 * Write a pointer to the target node on success.
 * Otherwise SXERR_NOTFOUND is returned on failure.
 */
static sxi32 HashmapLookup(
	ph7_hashmap *pMap,          /* Target hashmap */
	ph7_value *pKey,            /* Lookup key */
	ph7_hashmap_node **ppNode   /* OUT: target node on success */
	)
{
	ph7_hashmap_node *pNode = 0; /* cc -O6 warning */
	sxi32 rc;
	if( pKey->iFlags & (MEMOBJ_STRING|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES) ){
		if( (pKey->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(&(*pKey));
		}
		if( SyBlobLength(&pKey->sBlob) > 0 && !HashmapIsIntKey(&pKey->sBlob) ){
			/* Perform a blob lookup */
			rc = HashmapLookupBlobKey(&(*pMap),SyBlobData(&pKey->sBlob),SyBlobLength(&pKey->sBlob),&pNode);
			goto result;
		}
	}
	/* Perform an int lookup */
	if((pKey->iFlags & MEMOBJ_INT) == 0 ){
		/* Force an integer cast */
		PH7_MemObjToInteger(pKey);
	}
	/* Perform an int lookup */
	rc = HashmapLookupIntKey(&(*pMap),pKey->x.iVal,&pNode);
result:
	if( rc == SXRET_OK ){
		/* Node found */
		if( ppNode ){
			*ppNode = pNode;
		}
		return SXRET_OK;
	}
	/* No such entry */
	return SXERR_NOTFOUND;
}
/*
 * Insert a given key and it's associated value (if any) in the given
 * hashmap.
 * If a node with the given key already exists in the database
 * then this function overwrite the old value.
 */
static sxi32 HashmapInsert(
	ph7_hashmap *pMap, /* Target hashmap */
	ph7_value *pKey,   /* Lookup key  */
	ph7_value *pVal    /* Node value */
	)
{
	ph7_hashmap_node *pNode = 0;
	sxi32 rc = SXRET_OK;
	if( pKey && pKey->iFlags & (MEMOBJ_STRING|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES) ){
		if( (pKey->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(&(*pKey));
		}
		if( SyBlobLength(&pKey->sBlob) < 1 || HashmapIsIntKey(&pKey->sBlob) ){
			if(SyBlobLength(&pKey->sBlob) < 1){
				/* Automatic index assign */
				pKey = 0;
			}
			goto IntKey;
		}
		if( SXRET_OK == HashmapLookupBlobKey(&(*pMap),SyBlobData(&pKey->sBlob),
			SyBlobLength(&pKey->sBlob),&pNode) ){
				/* Overwrite the old value */
				ph7_value *pElem;
				pElem = (ph7_value *)SySetAt(&pMap->pVm->aMemObj,pNode->nValIdx);
				if( pElem ){
					if( pVal ){
						PH7_MemObjStore(pVal,pElem);
					}else{
						/* Nullify the entry */
						PH7_MemObjToNull(pElem);
					}
				}
				return SXRET_OK;
		}
		if( pMap == pMap->pVm->pGlobal ){
			/* Forbidden */
			PH7_VmThrowError(pMap->pVm,0,PH7_CTX_NOTICE,"$GLOBALS is a read-only array,insertion is forbidden");
			return SXRET_OK;
		}
		/* Perform a blob-key insertion */
		rc = HashmapInsertBlobKey(&(*pMap),SyBlobData(&pKey->sBlob),SyBlobLength(&pKey->sBlob),&(*pVal),0,FALSE);
		return rc;
	}
IntKey:
	if( pKey ){
		if((pKey->iFlags & MEMOBJ_INT) == 0 ){
			/* Force an integer cast */
			PH7_MemObjToInteger(pKey);
		}
		if( SXRET_OK == HashmapLookupIntKey(&(*pMap),pKey->x.iVal,&pNode) ){
			/* Overwrite the old value */
			ph7_value *pElem;
			pElem = (ph7_value *)SySetAt(&pMap->pVm->aMemObj,pNode->nValIdx);
			if( pElem ){
				if( pVal ){
					PH7_MemObjStore(pVal,pElem);
				}else{
					/* Nullify the entry */
					PH7_MemObjToNull(pElem);
				}
			}
			return SXRET_OK;
		}
		if( pMap == pMap->pVm->pGlobal ){
			/* Forbidden */
			PH7_VmThrowError(pMap->pVm,0,PH7_CTX_NOTICE,"$GLOBALS is a read-only array,insertion is forbidden");
			return SXRET_OK;
		}
		/* Perform a 64-bit-int-key insertion */
		rc = HashmapInsertIntKey(&(*pMap),pKey->x.iVal,&(*pVal),0,FALSE);
		if( rc == SXRET_OK ){
			if( pKey->x.iVal >= pMap->iNextIdx ){
				/* Increment the automatic index */ 
				pMap->iNextIdx = pKey->x.iVal + 1;
				/* Make sure the automatic index is not reserved */
				while( SXRET_OK == HashmapLookupIntKey(&(*pMap),pMap->iNextIdx,0) ){
					pMap->iNextIdx++;
				}
			}
		}
	}else{
		if( pMap == pMap->pVm->pGlobal ){
			/* Forbidden */
			PH7_VmThrowError(pMap->pVm,0,PH7_CTX_NOTICE,"$GLOBALS is a read-only array,insertion is forbidden");
			return SXRET_OK;
		}
		/* Assign an automatic index */
		rc = HashmapInsertIntKey(&(*pMap),pMap->iNextIdx,&(*pVal),0,FALSE);
		if( rc == SXRET_OK ){
			++pMap->iNextIdx;
		}
	}
	/* Insertion result */
	return rc;
}
/*
 * Insert a given key and it's associated value (foreign index) in the given
 * hashmap.
 * This is insertion by reference so be careful to mark the node
 * with the HASHMAP_NODE_FOREIGN_OBJ flag being set. 
 * The insertion by reference is triggered when the following
 * expression is encountered.
 * $var = 10;
 *  $a = array(&var);
 * OR
 *  $a[] =& $var;
 * That is,$var is a foreign ph7_value and the $a array have no control
 * over it's contents.
 * Note that the node that hold the foreign ph7_value is automatically 
 * removed when the foreign ph7_value is unset.
 * Example:
 *  $var = 10;
 *  $a[] =& $var;
 *  echo count($a).PHP_EOL; //1
 *  //Unset the foreign ph7_value now
 *  unset($var);
 *  echo count($a); //0
 * Note that this is a PH7 eXtension.
 * Refer to the official documentation for more information.
 * If a node with the given key already exists in the database
 * then this function overwrite the old value.
 */
static sxi32 HashmapInsertByRef(
	ph7_hashmap *pMap,   /* Target hashmap */
	ph7_value *pKey,     /* Lookup key */
	sxu32 nRefIdx        /* Foreign ph7_value index */
	)
{
	ph7_hashmap_node *pNode = 0;
	sxi32 rc = SXRET_OK;
	if( pKey && pKey->iFlags & (MEMOBJ_STRING|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES) ){
		if( (pKey->iFlags & MEMOBJ_STRING) == 0 ){
			/* Force a string cast */
			PH7_MemObjToString(&(*pKey));
		}
		if( SyBlobLength(&pKey->sBlob) < 1 || HashmapIsIntKey(&pKey->sBlob) ){
			if(SyBlobLength(&pKey->sBlob) < 1){
				/* Automatic index assign */
				pKey = 0;
			}
			goto IntKey;
		}
		if( SXRET_OK == HashmapLookupBlobKey(&(*pMap),SyBlobData(&pKey->sBlob),
			SyBlobLength(&pKey->sBlob),&pNode) ){
				/* Overwrite */
				PH7_VmRefObjRemove(pMap->pVm,pNode->nValIdx,0,pNode);
				pNode->nValIdx = nRefIdx;
				/* Install in the reference table */
				PH7_VmRefObjInstall(pMap->pVm,nRefIdx,0,pNode,0);
				return SXRET_OK;
		}
		/* Perform a blob-key insertion */
		rc = HashmapInsertBlobKey(&(*pMap),SyBlobData(&pKey->sBlob),SyBlobLength(&pKey->sBlob),0,nRefIdx,TRUE);
		return rc;
	}
IntKey:
	if( pKey ){
		if((pKey->iFlags & MEMOBJ_INT) == 0 ){
			/* Force an integer cast */
			PH7_MemObjToInteger(pKey);
		}
		if( SXRET_OK == HashmapLookupIntKey(&(*pMap),pKey->x.iVal,&pNode) ){
			/* Overwrite */
			PH7_VmRefObjRemove(pMap->pVm,pNode->nValIdx,0,pNode);
			pNode->nValIdx = nRefIdx;
			/* Install in the reference table */
			PH7_VmRefObjInstall(pMap->pVm,nRefIdx,0,pNode,0);
			return SXRET_OK;
		}
		/* Perform a 64-bit-int-key insertion */
		rc = HashmapInsertIntKey(&(*pMap),pKey->x.iVal,0,nRefIdx,TRUE);
		if( rc == SXRET_OK ){
			if( pKey->x.iVal >= pMap->iNextIdx ){
				/* Increment the automatic index */ 
				pMap->iNextIdx = pKey->x.iVal + 1;
				/* Make sure the automatic index is not reserved */
				while( SXRET_OK == HashmapLookupIntKey(&(*pMap),pMap->iNextIdx,0) ){
					pMap->iNextIdx++;
				}
			}
		}
	}else{
		/* Assign an automatic index */
		rc = HashmapInsertIntKey(&(*pMap),pMap->iNextIdx,0,nRefIdx,TRUE);
		if( rc == SXRET_OK ){
			++pMap->iNextIdx;
		}
	}
	/* Insertion result */
	return rc;
}
/*
 * Extract node value.
 */
static ph7_value * HashmapExtractNodeValue(ph7_hashmap_node *pNode)
{
	/* Point to the desired object */
	ph7_value *pObj;
	pObj = (ph7_value *)SySetAt(&pNode->pMap->pVm->aMemObj,pNode->nValIdx);
	return pObj;
}
/*
 * Insert a node in the given hashmap.
 * If a node with the given key already exists in the database
 * then this function overwrite the old value.
 */
static sxi32 HashmapInsertNode(ph7_hashmap *pMap,ph7_hashmap_node *pNode,int bPreserve)
{
	ph7_value *pObj;
	sxi32 rc;
	/* Extract the node value */
	pObj = HashmapExtractNodeValue(&(*pNode));
	if( pObj == 0 ){
		return SXERR_EMPTY;
	}
	/* Preserve key */
	if( pNode->iType == HASHMAP_INT_NODE){
		/* Int64 key */
		if( !bPreserve ){
			/* Assign an automatic index */
			rc = HashmapInsert(&(*pMap),0,pObj);
		}else{
			rc = HashmapInsertIntKey(&(*pMap),pNode->xKey.iKey,pObj,0,FALSE);
		}
	}else{
		/* Blob key */
		rc = HashmapInsertBlobKey(&(*pMap),SyBlobData(&pNode->xKey.sKey),
			SyBlobLength(&pNode->xKey.sKey),pObj,0,FALSE);
	}
	return rc;
}
/*
 * Compare two node values.
 * Return 0 if the node values are equals, > 0 if pLeft is greater than pRight
 * or < 0 if pRight is greater than pLeft.
 * For a full description on ph7_values comparison,refer to the implementation
 * of the [PH7_MemObjCmp()] function defined in memobj.c or the official
 * documenation.
 */
static sxi32 HashmapNodeCmp(ph7_hashmap_node *pLeft,ph7_hashmap_node *pRight,int bStrict)
{
	ph7_value sObj1,sObj2;
	sxi32 rc;
	if( pLeft == pRight ){
		/*
		 * Same node.Refer to the sort() implementation defined
		 * below for more information on this sceanario.
		 */
		return 0;
	}
	/* Do the comparison */
	PH7_MemObjInit(pLeft->pMap->pVm,&sObj1);
	PH7_MemObjInit(pLeft->pMap->pVm,&sObj2);
	PH7_HashmapExtractNodeValue(pLeft,&sObj1,FALSE);
	PH7_HashmapExtractNodeValue(pRight,&sObj2,FALSE);
	rc = PH7_MemObjCmp(&sObj1,&sObj2,bStrict,0);
	PH7_MemObjRelease(&sObj1);
	PH7_MemObjRelease(&sObj2);
	return rc;
}
/*
 * Rehash a node with a 64-bit integer key.
 * Refer to [merge_sort(),array_shift()] implementations for more information.
 */
static void HashmapRehashIntNode(ph7_hashmap_node *pEntry)
{
	ph7_hashmap *pMap = pEntry->pMap;
	sxu32 nBucket;
	/* Remove old collision links */
	if( pEntry->pPrevCollide ){
		pEntry->pPrevCollide->pNextCollide = pEntry->pNextCollide;
	}else{
		pMap->apBucket[pEntry->nHash & (pMap->nSize - 1)] = pEntry->pNextCollide;
	}
	if( pEntry->pNextCollide ){
		pEntry->pNextCollide->pPrevCollide = pEntry->pPrevCollide;
	}
	pEntry->pNextCollide = pEntry->pPrevCollide = 0;
	/* Compute the new hash */
	pEntry->nHash = pMap->xIntHash(pMap->iNextIdx);
	pEntry->xKey.iKey = pMap->iNextIdx;
	nBucket = pEntry->nHash & (pMap->nSize - 1);
	/* Link to the new bucket */
	pEntry->pNextCollide = pMap->apBucket[nBucket];
	if( pMap->apBucket[nBucket] ){
		pMap->apBucket[nBucket]->pPrevCollide = pEntry;
	}
	pEntry->pNextCollide = pMap->apBucket[nBucket];
	pMap->apBucket[nBucket] = pEntry;
	/* Increment the automatic index */
	pMap->iNextIdx++;
}
/*
 * Perform a linear search on a given hashmap.
 * Write a pointer to the target node on success.
 * Otherwise SXERR_NOTFOUND is returned on failure.
 * Refer to [array_intersect(),array_diff(),in_array(),...] implementations 
 * for more information.
 */
static int HashmapFindValue(
	ph7_hashmap *pMap,   /* Target hashmap */
	ph7_value *pNeedle,  /* Lookup key */
	ph7_hashmap_node **ppNode, /* OUT: target node on success  */
	int bStrict      /* TRUE for strict comparison */
	)
{
	ph7_hashmap_node *pEntry;
	ph7_value sVal,*pVal;
	ph7_value sNeedle;
	sxi32 rc;
	sxu32 n;
	/* Perform a linear search since we cannot sort the hashmap based on values */
	pEntry = pMap->pFirst;
	n = pMap->nEntry;
	PH7_MemObjInit(pMap->pVm,&sVal);
	PH7_MemObjInit(pMap->pVm,&sNeedle);
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			if( (pVal->iFlags|pNeedle->iFlags) & MEMOBJ_NULL ){
				sxi32 iF1 = pVal->iFlags&~MEMOBJ_AUX;
				sxi32 iF2 = pNeedle->iFlags&~MEMOBJ_AUX;
				if( iF1 == iF2 ){
					/* NULL values are equals */
					if( ppNode ){
						*ppNode = pEntry;
					}
					return SXRET_OK;
				}
			}else{
				/* Duplicate value */
				PH7_MemObjLoad(pVal,&sVal);
				PH7_MemObjLoad(pNeedle,&sNeedle);
				rc = PH7_MemObjCmp(&sNeedle,&sVal,bStrict,0);
				PH7_MemObjRelease(&sVal);
				PH7_MemObjRelease(&sNeedle);
				if( rc == 0 ){
					if( ppNode ){
						*ppNode = pEntry;
					}
					/* Match found*/
					return SXRET_OK;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* No such entry */
	return SXERR_NOTFOUND;
}
/*
 * Perform a linear search on a given hashmap but use an user-defined callback 
 * for values comparison.
 * Write a pointer to the target node on success.
 * Otherwise SXERR_NOTFOUND is returned on failure.
 * Refer to [array_uintersect(),array_udiff()...] implementations 
 * for more information.
 */
static int HashmapFindValueByCallback(
	ph7_hashmap *pMap,     /* Target hashmap */
	ph7_value *pNeedle,    /* Lookup key */
	ph7_value *pCallback,  /* User defined callback */
	ph7_hashmap_node **ppNode /* OUT: target node on success */
	)
{
	ph7_hashmap_node *pEntry;
	ph7_value sResult,*pVal;
	ph7_value *apArg[2];    /* Callback arguments */
	sxi32 rc;
	sxu32 n;
	/* Perform a linear search since we cannot sort the array based on values */
	pEntry = pMap->pFirst;
	n = pMap->nEntry;
	/* Store callback result here */
	PH7_MemObjInit(pMap->pVm,&sResult);
	/* First argument to the callback */
	apArg[0] = pNeedle;
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			/* Invoke the user callback */
			apArg[1] = pVal; /* Second argument to the callback */
			rc = PH7_VmCallUserFunction(pMap->pVm,pCallback,2,apArg,&sResult);
			if( rc == SXRET_OK ){
				/* Extract callback result */
				if( (sResult.iFlags & MEMOBJ_INT) == 0 ){
					/* Perform an int cast */
					PH7_MemObjToInteger(&sResult);
				}
				rc = (sxi32)sResult.x.iVal;
				PH7_MemObjRelease(&sResult);
				if( rc == 0 ){
					/* Match found*/
					if( ppNode ){
						*ppNode = pEntry;
					}
					return SXRET_OK;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* No such entry */
	return SXERR_NOTFOUND;
}
/*
 * Compare two hashmaps.
 * Return 0 if the hashmaps are equals.Any other value indicates inequality.
 * Note on array comparison operators.
 *  According to the PHP language reference manual.
 *  Array Operators Example 	Name 	Result
 *  $a + $b 	Union 	Union of $a and $b.
 *  $a == $b 	Equality 	TRUE if $a and $b have the same key/value pairs.
 *  $a === $b 	Identity 	TRUE if $a and $b have the same key/value pairs in the same 
 *                          order and of the same types.
 *  $a != $b 	Inequality 	TRUE if $a is not equal to $b.
 *  $a <> $b 	Inequality 	TRUE if $a is not equal to $b.
 *  $a !== $b 	Non-identity 	TRUE if $a is not identical to $b.
 * The + operator returns the right-hand array appended to the left-hand array;
 * For keys that exist in both arrays, the elements from the left-hand array will be used
 * and the matching elements from the right-hand array will be ignored.
 * <?php
 * $a = array("a" => "apple", "b" => "banana");
 * $b = array("a" => "pear", "b" => "strawberry", "c" => "cherry");
 * $c = $a + $b; // Union of $a and $b
 * echo "Union of \$a and \$b: \n";
 * var_dump($c);
 * $c = $b + $a; // Union of $b and $a
 * echo "Union of \$b and \$a: \n";
 * var_dump($c);
 * ?>
 * When executed, this script will print the following:
 * Union of $a and $b:
 * array(3) {
 *  ["a"]=>
 *  string(5) "apple"
 *  ["b"]=>
 * string(6) "banana"
 *  ["c"]=>
 * string(6) "cherry"
 * }
 * Union of $b and $a:
 * array(3) {
 * ["a"]=>
 * string(4) "pear"
 * ["b"]=>
 * string(10) "strawberry"
 * ["c"]=>
 * string(6) "cherry"
 * }
 * Elements of arrays are equal for the comparison if they have the same key and value.
 */
PH7_PRIVATE sxi32 PH7_HashmapCmp(
	ph7_hashmap *pLeft,  /* Left hashmap */
	ph7_hashmap *pRight, /* Right hashmap */
	int bStrict          /* TRUE for strict comparison */
	)
{
	ph7_hashmap_node *pLe,*pRe;
	sxi32 rc;
	sxu32 n;
	if( pLeft == pRight ){
		/* Same hashmap instance. This can easily happen since hashmaps are passed by reference.
		 * Unlike the zend engine.
		 */
		return 0;
	}
	if( pLeft->nEntry != pRight->nEntry ){
		/* Must have the same number of entries */
		return pLeft->nEntry > pRight->nEntry ? 1 : -1;
	}
	/* Point to the first inserted entry of the left hashmap */
	pLe = pLeft->pFirst;
	pRe = 0; /* cc warning */
	/* Perform the comparison */
	n = pLeft->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		if( pLe->iType == HASHMAP_INT_NODE){
			/* Int key */
			rc = HashmapLookupIntKey(&(*pRight),pLe->xKey.iKey,&pRe);
		}else{
			SyBlob *pKey = &pLe->xKey.sKey;
			/* Blob key */
			rc = HashmapLookupBlobKey(&(*pRight),SyBlobData(pKey),SyBlobLength(pKey),&pRe);
		}
		if( rc != SXRET_OK ){
			/* No such entry in the right side */
			return 1;
		}
		rc = 0;
		if( bStrict ){
			/* Make sure,the keys are of the same type */
			if( pLe->iType != pRe->iType ){
				rc = 1;
			}
		}
		if( !rc ){
			/* Compare nodes */
			rc = HashmapNodeCmp(pLe,pRe,bStrict);
		}
		if( rc != 0 ){
			/* Nodes key/value differ */
			return rc;
		}
		/* Point to the next entry */
		pLe = pLe->pPrev; /* Reverse link */
		n--;
	}
	return 0; /* Hashmaps are equals */
}
/*
 * Merge two hashmaps.
 * Note on the merge process
 * According to the PHP language reference manual.
 *  Merges the elements of two arrays together so that the values of one are appended
 *  to the end of the previous one. It returns the resulting array (pDest).
 *  If the input arrays have the same string keys, then the later value for that key
 *  will overwrite the previous one. If, however, the arrays contain numeric keys
 *  the later value will not overwrite the original value, but will be appended.
 *  Values in the input array with numeric keys will be renumbered with incrementing
 *  keys starting from zero in the result array. 
 */
static sxi32 HashmapMerge(ph7_hashmap *pSrc,ph7_hashmap *pDest)
{
	ph7_hashmap_node *pEntry;
	ph7_value sKey,*pVal;
	sxi32 rc;
	sxu32 n;
	if( pSrc == pDest ){
		/* Same map. This can easily happen since hashmaps are passed by reference.
		 * Unlike the zend engine.
		 */
		return SXRET_OK;
	}
	/* Point to the first inserted entry in the source */
	pEntry = pSrc->pFirst;
	/* Perform the merge */
	for( n = 0 ; n < pSrc->nEntry ; ++n ){
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pEntry->iType == HASHMAP_BLOB_NODE ){
			/* Blob key insertion */
			PH7_MemObjInitFromString(pDest->pVm,&sKey,0);
			PH7_MemObjStringAppend(&sKey,(const char *)SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey));
			rc = PH7_HashmapInsert(&(*pDest),&sKey,pVal);
			PH7_MemObjRelease(&sKey);
		}else{
			rc = HashmapInsert(&(*pDest),0/* Automatic index assign */,pVal);
		}
		if( rc != SXRET_OK ){
			return rc;
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	return SXRET_OK;
}
/*
 * Overwrite entries with the same key.
 * Refer to the [array_replace()] implementation for more information.
 *  According to the PHP language reference manual.
 *  array_replace() replaces the values of the first array with the same values
 *  from all the following arrays. If a key from the first array exists in the second
 *  array, its value will be replaced by the value from the second array. If the key
 *  exists in the second array, and not the first, it will be created in the first array.
 *  If a key only exists in the first array, it will be left as is. If several arrays
 *  are passed for replacement, they will be processed in order, the later arrays 
 *  overwriting the previous values.
 *  array_replace() is not recursive : it will replace values in the first array
 *  by whatever type is in the second array. 
 */
static sxi32 HashmapOverwrite(ph7_hashmap *pSrc,ph7_hashmap *pDest)
{
	ph7_hashmap_node *pEntry;
	ph7_value sKey,*pVal;
	sxi32 rc;
	sxu32 n;
	if( pSrc == pDest ){
		/* Same map. This can easily happen since hashmaps are passed by reference.
		 * Unlike the zend engine.
		 */
		return SXRET_OK;
	}
	/* Point to the first inserted entry in the source */
	pEntry = pSrc->pFirst;
	/* Perform the merge */
	for( n = 0 ; n < pSrc->nEntry ; ++n ){
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pEntry->iType == HASHMAP_BLOB_NODE ){
			/* Blob key insertion */
			PH7_MemObjInitFromString(pDest->pVm,&sKey,0);
			PH7_MemObjStringAppend(&sKey,(const char *)SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey));
		}else{
			/* Int key insertion */
			PH7_MemObjInitFromInt(pDest->pVm,&sKey,pEntry->xKey.iKey);
		}
		rc = PH7_HashmapInsert(&(*pDest),&sKey,pVal);
		PH7_MemObjRelease(&sKey);
		if( rc != SXRET_OK ){
			return rc;
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	return SXRET_OK;
}
/*
 * Duplicate the contents of a hashmap. Store the copy in pDest.
 * Refer to the [array_pad(),array_copy(),...] implementation for more information.
 */
PH7_PRIVATE sxi32 PH7_HashmapDup(ph7_hashmap *pSrc,ph7_hashmap *pDest)
{
	ph7_hashmap_node *pEntry;
	ph7_value sKey,*pVal;
	sxi32 rc;
	sxu32 n;
	if( pSrc == pDest ){
		/* Same map. This can easily happen since hashmaps are passed by reference.
		 * Unlike the zend engine.
		 */
		return SXRET_OK;
	}
	/* Point to the first inserted entry in the source */
	pEntry = pSrc->pFirst;
	/* Perform the duplication */
	for( n = 0 ; n < pSrc->nEntry ; ++n ){
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pEntry->iType == HASHMAP_BLOB_NODE ){
			/* Blob key insertion */
			PH7_MemObjInitFromString(pDest->pVm,&sKey,0);
			PH7_MemObjStringAppend(&sKey,(const char *)SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey));
			rc = PH7_HashmapInsert(&(*pDest),&sKey,pVal);
			PH7_MemObjRelease(&sKey);
		}else{
			/* Int key insertion */
			rc = HashmapInsertIntKey(&(*pDest),pEntry->xKey.iKey,pVal,0,FALSE);
		}
		if( rc != SXRET_OK ){
			return rc;
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	return SXRET_OK;
}
/*
 * Perform the union of two hashmaps.
 * This operation is performed only if the user uses the '+' operator
 * with a variable holding an array as follows:
 * <?php
 * $a = array("a" => "apple", "b" => "banana");
 * $b = array("a" => "pear", "b" => "strawberry", "c" => "cherry");
 * $c = $a + $b; // Union of $a and $b
 * echo "Union of \$a and \$b: \n";
 * var_dump($c);
 * $c = $b + $a; // Union of $b and $a
 * echo "Union of \$b and \$a: \n";
 * var_dump($c);
 * ?>
 * When executed, this script will print the following:
 * Union of $a and $b:
 * array(3) {
 *  ["a"]=>
 *  string(5) "apple"
 *  ["b"]=>
 * string(6) "banana"
 *  ["c"]=>
 * string(6) "cherry"
 * }
 * Union of $b and $a:
 * array(3) {
 * ["a"]=>
 * string(4) "pear"
 * ["b"]=>
 * string(10) "strawberry"
 * ["c"]=>
 * string(6) "cherry"
 * }
 * The + operator returns the right-hand array appended to the left-hand array;
 * For keys that exist in both arrays, the elements from the left-hand array will be used
 * and the matching elements from the right-hand array will be ignored.
 */
PH7_PRIVATE sxi32 PH7_HashmapUnion(ph7_hashmap *pLeft,ph7_hashmap *pRight)
{
	ph7_hashmap_node *pEntry;
	sxi32 rc = SXRET_OK;
	ph7_value *pObj;
	sxu32 n;
	if( pLeft == pRight ){
		/* Same map. This can easily happen since hashmaps are passed by reference.
		 * Unlike the zend engine.
		 */
		return SXRET_OK;
	}
	/* Perform the union */
	pEntry = pRight->pFirst;
	for(n = 0 ; n < pRight->nEntry ; ++n ){
		/* Make sure the given key does not exists in the left array */
		if( pEntry->iType == HASHMAP_BLOB_NODE ){
			/* BLOB key */
			if( SXRET_OK != 
				HashmapLookupBlobKey(&(*pLeft),SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey),0) ){
					pObj = HashmapExtractNodeValue(pEntry);
					if( pObj ){
						/* Perform the insertion */
						rc = HashmapInsertBlobKey(&(*pLeft),SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey),
							pObj,0,FALSE);
						if( rc != SXRET_OK ){
							return rc;
						}
					}
			}
		}else{
			/* INT key */
			if( SXRET_OK != HashmapLookupIntKey(&(*pLeft),pEntry->xKey.iKey,0) ){
				pObj = HashmapExtractNodeValue(pEntry);
				if( pObj ){
					/* Perform the insertion */
					rc = HashmapInsertIntKey(&(*pLeft),pEntry->xKey.iKey,pObj,0,FALSE);
					if( rc != SXRET_OK ){
						return rc;
					}
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	return SXRET_OK;
}
/*
 * Allocate a new hashmap.
 * Return a pointer to the freshly allocated hashmap on success.NULL otherwise.
 */
PH7_PRIVATE ph7_hashmap * PH7_NewHashmap(
	ph7_vm *pVm,              /* VM that trigger the hashmap creation */
	sxu32 (*xIntHash)(sxi64), /* Hash function for int keys.NULL otherwise*/
	sxu32 (*xBlobHash)(const void *,sxu32) /* Hash function for BLOB keys.NULL otherwise */
	)
{
	ph7_hashmap *pMap;
	/* Allocate a new instance */
	pMap = (ph7_hashmap *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_hashmap));
	if( pMap == 0 ){
		return 0;
	}
	/* Zero the structure */
	SyZero(pMap,sizeof(ph7_hashmap));
	/* Fill in the structure */
	pMap->pVm = &(*pVm);
	pMap->iRef = 1;
	/* Default hash functions */
	pMap->xIntHash  = xIntHash ? xIntHash : IntHash;
	pMap->xBlobHash = xBlobHash ? xBlobHash : BinHash;
	return pMap;
}
/*
 * Install superglobals in the given virtual machine.
 * Note on superglobals.
 *  According to the PHP language reference manual.
 *  Superglobals are built-in variables that are always available in all scopes.
*   Description
*   Several predefined variables in PHP are "superglobals", which means they
*   are available in all scopes throughout a script. There is no need to do
*   global $variable; to access them within functions or methods.
*   These superglobal variables are:
*    $GLOBALS
*    $_SERVER
*    $_GET
*    $_POST
*    $_FILES
*    $_COOKIE
*    $_SESSION
*    $_REQUEST
*    $_ENV
*/
PH7_PRIVATE sxi32 PH7_HashmapCreateSuper(ph7_vm *pVm)
{
	static const char * azSuper[] = {
		"_SERVER",   /* $_SERVER */
		"_GET",      /* $_GET */
		"_POST",     /* $_POST */
		"_FILES",    /* $_FILES */
		"_COOKIE",   /* $_COOKIE */
		"_SESSION",  /* $_SESSION */
		"_REQUEST",  /* $_REQUEST */
		"_ENV",      /* $_ENV */
		"_HEADER",   /* $_HEADER */
		"argv"       /* $argv */
	};
	ph7_hashmap *pMap;
	ph7_value *pObj;
	SyString *pFile;
	sxi32 rc;
	sxu32 n;
	/* Allocate a new hashmap for the $GLOBALS array */
	pMap = PH7_NewHashmap(&(*pVm),0,0);
	if( pMap == 0 ){
		return SXERR_MEM;
	}
	pVm->pGlobal = pMap;
	/* Reserve a ph7_value for the $GLOBALS array*/
	pObj = PH7_ReserveMemObj(&(*pVm));
	if( pObj == 0 ){
		return SXERR_MEM;
	}
	PH7_MemObjInitFromArray(&(*pVm),pObj,pMap);
	/* Record object index */
	pVm->nGlobalIdx = pObj->nIdx;
	/* Install the special $GLOBALS array */
	rc = SyHashInsert(&pVm->hSuper,(const void *)"GLOBALS",sizeof("GLOBALS")-1,SX_INT_TO_PTR(pVm->nGlobalIdx));
	if( rc != SXRET_OK ){
		return rc;
	}
	/* Install superglobals now */
	for( n =  0 ; n < SX_ARRAYSIZE(azSuper)  ; n++ ){
		ph7_value *pSuper;
		/* Request an empty array */
		pSuper = ph7_new_array(&(*pVm));
		if( pSuper == 0 ){
			return SXERR_MEM;
		}
		/* Install */
		rc = ph7_vm_config(&(*pVm),PH7_VM_CONFIG_CREATE_SUPER,azSuper[n]/* Super-global name*/,pSuper/* Super-global value */);
		if( rc != SXRET_OK ){
			return rc;
		}
		/* Release the value now it have been installed */
		ph7_release_value(&(*pVm),pSuper);
	}
	/* Set some $_SERVER entries */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	/*
	 * 'SCRIPT_FILENAME'
	 * The absolute pathname of the currently executing script.
	 */
	ph7_vm_config(pVm,PH7_VM_CONFIG_SERVER_ATTR,
		"SCRIPT_FILENAME",
		pFile ? pFile->zString : ":Memory:",
		pFile ? pFile->nByte : sizeof(":Memory:") - 1
		);
	/* All done,all super-global are installed now */
	return SXRET_OK;
}
/*
 * Release a hashmap.
 */
PH7_PRIVATE sxi32 PH7_HashmapRelease(ph7_hashmap *pMap,int FreeDS)
{
	ph7_hashmap_node *pEntry,*pNext;
	ph7_vm *pVm = pMap->pVm;
	sxu32 n;
	if( pMap == pVm->pGlobal ){
		/* Cannot delete the $GLOBALS array */
		PH7_VmThrowError(pMap->pVm,0,PH7_CTX_NOTICE,"$GLOBALS is a read-only array,deletion is forbidden");
		return SXRET_OK;
	}
	/* Start the release process */
	n = 0;
	pEntry = pMap->pFirst;
	for(;;){
		if( n >= pMap->nEntry ){
			break;
		}
		pNext = pEntry->pPrev; /* Reverse link */
		/* Remove the reference from the foreign table */
		PH7_VmRefObjRemove(pVm,pEntry->nValIdx,0,pEntry);
		if( (pEntry->iFlags & HASHMAP_NODE_FOREIGN_OBJ) == 0 ){
			/* Restore the ph7_value to the free list */
			PH7_VmUnsetMemObj(pVm,pEntry->nValIdx,FALSE);
		}
		/* Release the node */
		if( pEntry->iType == HASHMAP_BLOB_NODE ){
			SyBlobRelease(&pEntry->xKey.sKey);
		}
		SyMemBackendPoolFree(&pVm->sAllocator,pEntry);
		/* Point to the next entry */
		pEntry = pNext;
		n++;
	}
	if( pMap->nEntry > 0 ){
		/* Release the hash bucket */
		SyMemBackendFree(&pVm->sAllocator,pMap->apBucket);
	}
	if( FreeDS ){
		/* Free the whole instance */
		SyMemBackendPoolFree(&pVm->sAllocator,pMap);
	}else{
		/* Keep the instance but reset it's fields */
		pMap->apBucket = 0;
		pMap->iNextIdx = 0;
		pMap->nEntry = pMap->nSize = 0;
		pMap->pFirst = pMap->pLast = pMap->pCur = 0;
	}
	return SXRET_OK;
}
/*
 * Decrement the reference count of a given hashmap.
 * If the count reaches zero which mean no more variables
 * are pointing to this hashmap,then release the whole instance.
 */
PH7_PRIVATE void  PH7_HashmapUnref(ph7_hashmap *pMap)
{
	ph7_vm *pVm = pMap->pVm;
	/* TICKET 1432-49: $GLOBALS is not subject to garbage collection */
	pMap->iRef--;
	if( pMap->iRef < 1 && pMap != pVm->pGlobal){
		PH7_HashmapRelease(pMap,TRUE);
	}
}
/*
 * Check if a given key exists in the given hashmap.
 * Write a pointer to the target node on success.
 * Otherwise SXERR_NOTFOUND is returned on failure.
 */
PH7_PRIVATE sxi32 PH7_HashmapLookup(
	ph7_hashmap *pMap,        /* Target hashmap */
	ph7_value *pKey,          /* Lookup key */
	ph7_hashmap_node **ppNode /* OUT: Target node on success */
	)
{
	sxi32 rc;
	if( pMap->nEntry < 1 ){
		/* TICKET 1433-25: Don't bother hashing,the hashmap is empty anyway.
		 */
		return SXERR_NOTFOUND;
	}
	rc = HashmapLookup(&(*pMap),&(*pKey),ppNode);
	return rc;
}
/*
 * Insert a given key and it's associated value (if any) in the given
 * hashmap.
 * If a node with the given key already exists in the database
 * then this function overwrite the old value.
 */
PH7_PRIVATE sxi32 PH7_HashmapInsert(
	ph7_hashmap *pMap, /* Target hashmap */
	ph7_value *pKey,   /* Lookup key */
	ph7_value *pVal    /* Node value.NULL otherwise */
	)
{
	sxi32 rc;
	if( pVal && (pVal->iFlags & MEMOBJ_HASHMAP) && (ph7_hashmap *)pVal->x.pOther == pMap->pVm->pGlobal ){
		/*
		 * TICKET 1433-35: Insertion in the $GLOBALS array is forbidden.
		 */ 
		PH7_VmThrowError(pMap->pVm,0,PH7_CTX_ERR,"$GLOBALS is a read-only array,insertion is forbidden");
		return SXRET_OK;
	}
	rc = HashmapInsert(&(*pMap),&(*pKey),&(*pVal));
	return rc;
}
/*
 * Insert a given key and it's associated value (foreign index) in the given
 * hashmap.
 * This is insertion by reference so be careful to mark the node
 * with the HASHMAP_NODE_FOREIGN_OBJ flag being set. 
 * The insertion by reference is triggered when the following
 * expression is encountered.
 * $var = 10;
 *  $a = array(&var);
 * OR
 *  $a[] =& $var;
 * That is,$var is a foreign ph7_value and the $a array have no control
 * over it's contents.
 * Note that the node that hold the foreign ph7_value is automatically 
 * removed when the foreign ph7_value is unset.
 * Example:
 *  $var = 10;
 *  $a[] =& $var;
 *  echo count($a).PHP_EOL; //1
 *  //Unset the foreign ph7_value now
 *  unset($var);
 *  echo count($a); //0
 * Note that this is a PH7 eXtension.
 * Refer to the official documentation for more information.
 * If a node with the given key already exists in the database
 * then this function overwrite the old value.
 */
PH7_PRIVATE sxi32 PH7_HashmapInsertByRef(
	ph7_hashmap *pMap, /* Target hashmap */
	ph7_value *pKey,   /* Lookup key */
	sxu32 nRefIdx      /* Foreign ph7_value index */
	)
{
	sxi32 rc;
	if( nRefIdx == pMap->pVm->nGlobalIdx ){
		/*
		 * TICKET 1433-35: Insertion in the $GLOBALS array is forbidden.
		 */ 
		PH7_VmThrowError(pMap->pVm,0,PH7_CTX_ERR,"$GLOBALS is a read-only array,insertion is forbidden");
		return SXRET_OK;
	}
	rc = HashmapInsertByRef(&(*pMap),&(*pKey),nRefIdx);
	return rc;
}
/*
 * Reset the node cursor of a given hashmap.
 */
PH7_PRIVATE void PH7_HashmapResetLoopCursor(ph7_hashmap *pMap)
{
	/* Reset the loop cursor */
	pMap->pCur = pMap->pFirst;
}
/*
 * Return a pointer to the node currently pointed by the node cursor.
 * If the cursor reaches the end of the list,then this function
 * return NULL.
 * Note that the node cursor is automatically advanced by this function.
 */
PH7_PRIVATE ph7_hashmap_node * PH7_HashmapGetNextEntry(ph7_hashmap *pMap)
{
	ph7_hashmap_node *pCur = pMap->pCur;
	if( pCur == 0 ){
		/* End of the list,return null */
		return 0;
	}
	/* Advance the node cursor */
	pMap->pCur = pCur->pPrev; /* Reverse link */
	return pCur;
}
/*
 * Extract a node value.
 */
PH7_PRIVATE void PH7_HashmapExtractNodeValue(ph7_hashmap_node *pNode,ph7_value *pValue,int bStore)
{
	ph7_value *pEntry = HashmapExtractNodeValue(pNode);
	if( pEntry ){
		if( bStore ){
			PH7_MemObjStore(pEntry,pValue);
		}else{
			PH7_MemObjLoad(pEntry,pValue);
		}
	}else{
		PH7_MemObjRelease(pValue);
	}
}
/*
 * Extract a node key.
 */
PH7_PRIVATE void PH7_HashmapExtractNodeKey(ph7_hashmap_node *pNode,ph7_value *pKey)
{
	/* Fill with the current key */
	if( pNode->iType == HASHMAP_INT_NODE ){
		if( SyBlobLength(&pKey->sBlob) > 0 ){
			SyBlobRelease(&pKey->sBlob);
		}
		pKey->x.iVal = pNode->xKey.iKey;
		MemObjSetType(pKey,MEMOBJ_INT);
	}else{
		SyBlobReset(&pKey->sBlob);
		SyBlobAppend(&pKey->sBlob,SyBlobData(&pNode->xKey.sKey),SyBlobLength(&pNode->xKey.sKey));
		MemObjSetType(pKey,MEMOBJ_STRING);
	}
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
/*
 * Store the address of nodes value in the given container.
 * Refer to the [vfprintf(),vprintf(),vsprintf()] implementations
 * defined in 'builtin.c' for more information.
 */
PH7_PRIVATE int PH7_HashmapValuesToSet(ph7_hashmap *pMap,SySet *pOut)
{
	ph7_hashmap_node *pEntry = pMap->pFirst;
	ph7_value *pValue;
	sxu32 n;
	/* Initialize the container */
	SySetInit(pOut,&pMap->pVm->sAllocator,sizeof(ph7_value *));
	for(n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extract node value */
		pValue = HashmapExtractNodeValue(pEntry);
		if( pValue ){
			SySetPut(pOut,(const void *)&pValue);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Total inserted entries */
	return (int)SySetUsed(pOut);
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * Merge sort.
 * The merge sort implementation is based on the one found in the SQLite3 source tree.
 * Status: Public domain
 */
/* Node comparison callback signature */
typedef sxi32 (*ProcNodeCmp)(ph7_hashmap_node *,ph7_hashmap_node *,void *);
/*
** Inputs:
**   a:       A sorted, null-terminated linked list.  (May be null).
**   b:       A sorted, null-terminated linked list.  (May be null).
**   cmp:     A pointer to the comparison function.
**
** Return Value:
**   A pointer to the head of a sorted list containing the elements
**   of both a and b.
**
** Side effects:
**   The "next","prev" pointers for elements in the lists a and b are
**   changed.
*/
static ph7_hashmap_node * HashmapNodeMerge(ph7_hashmap_node *pA,ph7_hashmap_node *pB,ProcNodeCmp xCmp,void *pCmpData)
{
	ph7_hashmap_node result,*pTail;
    /* Prevent compiler warning */
	result.pNext = result.pPrev = 0;
	pTail = &result;
	while( pA && pB ){
		if( xCmp(pA,pB,pCmpData) < 0 ){
			pTail->pPrev = pA;
			pA->pNext = pTail;
			pTail = pA;
			pA = pA->pPrev;
		}else{
			pTail->pPrev = pB;
			pB->pNext = pTail;
			pTail = pB;
			pB = pB->pPrev;
		}
	}
	if( pA ){
		pTail->pPrev = pA;
		pA->pNext = pTail;
	}else if( pB ){
		pTail->pPrev = pB;
		pB->pNext = pTail;
	}else{
		pTail->pPrev = pTail->pNext = 0;
	}
	return result.pPrev;
}
/*
** Inputs:
**   Map:       Input hashmap
**   cmp:       A comparison function.
**
** Return Value:
**   Sorted hashmap.
**
** Side effects:
**   The "next" pointers for elements in list are changed.
*/
#define N_SORT_BUCKET  32
static sxi32 HashmapMergeSort(ph7_hashmap *pMap,ProcNodeCmp xCmp,void *pCmpData)
{
	ph7_hashmap_node *a[N_SORT_BUCKET], *p,*pIn;
	sxu32 i;
	SyZero(a,sizeof(a));
	/* Point to the first inserted entry */
	pIn = pMap->pFirst;
	while( pIn ){
		p = pIn;
		pIn = p->pPrev;
		p->pPrev = 0;
		for(i=0; i<N_SORT_BUCKET-1; i++){
			if( a[i]==0 ){
				a[i] = p;
				break;
			}else{
				p = HashmapNodeMerge(a[i],p,xCmp,pCmpData);
				a[i] = 0;
			}
		}
		if( i==N_SORT_BUCKET-1 ){
			/* To get here, there need to be 2^(N_SORT_BUCKET) elements in he input list.
			 * But that is impossible.
			 */
			a[i] = HashmapNodeMerge(a[i], p,xCmp,pCmpData);
		}
	}
	p = a[0];
	for(i=1; i<N_SORT_BUCKET; i++){
		p = HashmapNodeMerge(p,a[i],xCmp,pCmpData);
	}
	p->pNext = 0;
	/* Reflect the change */
	pMap->pFirst = p;
	/* Reset the loop cursor */
	pMap->pCur = pMap->pFirst;
	return SXRET_OK;
}
/* 
 * Node comparison callback.
 * used-by: [sort(),asort(),...]
 */
static sxi32 HashmapCmpCallback1(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	ph7_value sA,sB;
	sxi32 iFlags;
	int rc;
	if( pCmpData == 0 ){
		/* Perform a standard comparison */
		rc = HashmapNodeCmp(pA,pB,FALSE);
		return rc;
	}
	iFlags = SX_PTR_TO_INT(pCmpData);
	/* Duplicate node values */
	PH7_MemObjInit(pA->pMap->pVm,&sA);
	PH7_MemObjInit(pA->pMap->pVm,&sB);
	PH7_HashmapExtractNodeValue(pA,&sA,FALSE);
	PH7_HashmapExtractNodeValue(pB,&sB,FALSE);
	if( iFlags == 5 ){
		/* String cast */
		if( (sA.iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(&sA);
		}
		if( (sB.iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(&sB);
		}
	}else{
		/* Numeric cast */
		PH7_MemObjToNumeric(&sA);
		PH7_MemObjToNumeric(&sB);
	}
	/* Perform the comparison */
	rc = PH7_MemObjCmp(&sA,&sB,FALSE,0);
	PH7_MemObjRelease(&sA);
	PH7_MemObjRelease(&sB);
	return rc;
}
/*
 * Node comparison callback: Compare nodes by keys only.
 * used-by: [ksort()]
 */
static sxi32 HashmapCmpCallback2(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	sxi32 rc;
	SXUNUSED(pCmpData); /* cc warning */
	if( pA->iType == HASHMAP_BLOB_NODE && pB->iType == HASHMAP_BLOB_NODE ){
		/* Perform a string comparison */
		rc = SyBlobCmp(&pA->xKey.sKey,&pB->xKey.sKey);
	}else{
		SyString sStr;
		sxi64 iA,iB;
		/* Perform a numeric comparison */
		if( pA->iType == HASHMAP_BLOB_NODE ){
			/* Cast to 64-bit integer */
			SyStringInitFromBuf(&sStr,SyBlobData(&pA->xKey.sKey),SyBlobLength(&pA->xKey.sKey));
			if( sStr.nByte < 1 ){
				iA = 0;
			}else{
				SyStrToInt64(sStr.zString,sStr.nByte,(void *)&iA,0);
			}
		}else{
			iA = pA->xKey.iKey;
		}
		if( pB->iType == HASHMAP_BLOB_NODE ){
			/* Cast to 64-bit integer */
			SyStringInitFromBuf(&sStr,SyBlobData(&pB->xKey.sKey),SyBlobLength(&pB->xKey.sKey));
			if( sStr.nByte < 1 ){
				iB = 0;
			}else{
				SyStrToInt64(sStr.zString,sStr.nByte,(void *)&iB,0);
			}
		}else{
			iB = pB->xKey.iKey;
		}
		rc = (sxi32)(iA-iB);
	}
	/* Comparison result */
	return rc;
}
/*
 * Node comparison callback.
 * Used by: [rsort(),arsort()];
 */
static sxi32 HashmapCmpCallback3(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	ph7_value sA,sB;
	sxi32 iFlags;
	int rc;
	if( pCmpData == 0 ){
		/* Perform a standard comparison */
		rc = HashmapNodeCmp(pA,pB,FALSE);
		return -rc;
	}
	iFlags = SX_PTR_TO_INT(pCmpData);
	/* Duplicate node values */
	PH7_MemObjInit(pA->pMap->pVm,&sA);
	PH7_MemObjInit(pA->pMap->pVm,&sB);
	PH7_HashmapExtractNodeValue(pA,&sA,FALSE);
	PH7_HashmapExtractNodeValue(pB,&sB,FALSE);
	if( iFlags == 5 ){
		/* String cast */
		if( (sA.iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(&sA);
		}
		if( (sB.iFlags & MEMOBJ_STRING) == 0 ){
			PH7_MemObjToString(&sB);
		}
	}else{
		/* Numeric cast */
		PH7_MemObjToNumeric(&sA);
		PH7_MemObjToNumeric(&sB);
	}
	/* Perform the comparison */
	rc = PH7_MemObjCmp(&sA,&sB,FALSE,0);
	PH7_MemObjRelease(&sA);
	PH7_MemObjRelease(&sB);
	return -rc;
}
/*
 * Node comparison callback: Invoke an user-defined callback for the purpose of node comparison.
 * used-by: [usort(),uasort()]
 */
static sxi32 HashmapCmpCallback4(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	ph7_value sResult,*pCallback;
	ph7_value *pV1,*pV2;
	ph7_value *apArg[2];  /* Callback arguments */
	sxi32 rc;
	/* Point to the desired callback */
	pCallback = (ph7_value *)pCmpData;
	/* initialize the result value */
	PH7_MemObjInit(pA->pMap->pVm,&sResult);
	/* Extract nodes values */
	pV1 = HashmapExtractNodeValue(pA);
	pV2 = HashmapExtractNodeValue(pB);
	apArg[0] = pV1;
	apArg[1] = pV2;
	/* Invoke the callback */
	rc = PH7_VmCallUserFunction(pA->pMap->pVm,pCallback,2,apArg,&sResult);
	if( rc != SXRET_OK ){
		/* An error occured while calling user defined function [i.e: not defined] */
		rc = -1; /* Set a dummy result */
	}else{
		/* Extract callback result */
		if((sResult.iFlags & MEMOBJ_INT) == 0 ){
			/* Perform an int cast */
			PH7_MemObjToInteger(&sResult);
		}
		rc = (sxi32)sResult.x.iVal;
	}
	PH7_MemObjRelease(&sResult);
	/* Callback result */
	return rc;
}
/*
 * Node comparison callback: Compare nodes by keys only.
 * used-by: [krsort()]
 */
static sxi32 HashmapCmpCallback5(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	sxi32 rc;
	SXUNUSED(pCmpData); /* cc warning */
	if( pA->iType == HASHMAP_BLOB_NODE && pB->iType == HASHMAP_BLOB_NODE ){
		/* Perform a string comparison */
		rc = SyBlobCmp(&pA->xKey.sKey,&pB->xKey.sKey);
	}else{
		SyString sStr;
		sxi64 iA,iB;
		/* Perform a numeric comparison */
		if( pA->iType == HASHMAP_BLOB_NODE ){
			/* Cast to 64-bit integer */
			SyStringInitFromBuf(&sStr,SyBlobData(&pA->xKey.sKey),SyBlobLength(&pA->xKey.sKey));
			if( sStr.nByte < 1 ){
				iA = 0;
			}else{
				SyStrToInt64(sStr.zString,sStr.nByte,(void *)&iA,0);
			}
		}else{
			iA = pA->xKey.iKey;
		}
		if( pB->iType == HASHMAP_BLOB_NODE ){
			/* Cast to 64-bit integer */
			SyStringInitFromBuf(&sStr,SyBlobData(&pB->xKey.sKey),SyBlobLength(&pB->xKey.sKey));
			if( sStr.nByte < 1 ){
				iB = 0;
			}else{
				SyStrToInt64(sStr.zString,sStr.nByte,(void *)&iB,0);
			}
		}else{
			iB = pB->xKey.iKey;
		}
		rc = (sxi32)(iA-iB);
	}
	return -rc; /* Reverse result */
}
/*
 * Node comparison callback: Invoke an user-defined callback for the purpose of node comparison.
 * used-by: [uksort()]
 */
static sxi32 HashmapCmpCallback6(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	ph7_value sResult,*pCallback;
	ph7_value *apArg[2];  /* Callback arguments */
	ph7_value sK1,sK2;
	sxi32 rc;
	/* Point to the desired callback */
	pCallback = (ph7_value *)pCmpData;
	/* initialize the result value */
	PH7_MemObjInit(pA->pMap->pVm,&sResult);
	PH7_MemObjInit(pA->pMap->pVm,&sK1);
	PH7_MemObjInit(pA->pMap->pVm,&sK2);
	/* Extract nodes keys */
	PH7_HashmapExtractNodeKey(pA,&sK1);
	PH7_HashmapExtractNodeKey(pB,&sK2);
	apArg[0] = &sK1;
	apArg[1] = &sK2;
	/* Mark keys as constants */
	sK1.nIdx = SXU32_HIGH;
	sK2.nIdx = SXU32_HIGH;
	/* Invoke the callback */
	rc = PH7_VmCallUserFunction(pA->pMap->pVm,pCallback,2,apArg,&sResult);
	if( rc != SXRET_OK ){
		/* An error occured while calling user defined function [i.e: not defined] */
		rc = -1; /* Set a dummy result */
	}else{
		/* Extract callback result */
		if((sResult.iFlags & MEMOBJ_INT) == 0 ){
			/* Perform an int cast */
			PH7_MemObjToInteger(&sResult);
		}
		rc = (sxi32)sResult.x.iVal;
	}
	PH7_MemObjRelease(&sResult);
	PH7_MemObjRelease(&sK1);
	PH7_MemObjRelease(&sK2);
	/* Callback result */
	return rc;
}
/*
 * Node comparison callback: Random node comparison.
 * used-by: [shuffle()]
 */
static sxi32 HashmapCmpCallback7(ph7_hashmap_node *pA,ph7_hashmap_node *pB,void *pCmpData)
{
	sxu32 n;
	SXUNUSED(pB); /* cc warning */
	SXUNUSED(pCmpData);
	/* Grab a random number */
	n = PH7_VmRandomNum(pA->pMap->pVm);
	/* if the random number is odd then the first node 'pA' is greater then
	 * the second node 'pB'. Otherwise the reverse is assumed.
	 */
	return n&1 ? 1 : -1;
}
/*
 * Rehash all nodes keys after a merge-sort have been applied.
 * Used by [sort(),usort() and rsort()].
 */
static void HashmapSortRehash(ph7_hashmap *pMap)
{
	ph7_hashmap_node *p,*pLast;
	sxu32 i;
	/* Rehash all entries */
	pLast = p = pMap->pFirst;
	pMap->iNextIdx = 0; /* Reset the automatic index */
	i = 0;
	for( ;; ){
		if( i >= pMap->nEntry ){
			pMap->pLast = pLast; /* Fix the last link broken by the merge-sort */
			break;
		}
		if( p->iType == HASHMAP_BLOB_NODE ){
			/* Do not maintain index association as requested by the PHP specification */
			SyBlobRelease(&p->xKey.sKey);
			/* Change key type */
			p->iType = HASHMAP_INT_NODE;
		}
		HashmapRehashIntNode(p);
		/* Point to the next entry */
		i++;
		pLast = p;
		p = p->pPrev; /* Reverse link */
	}
}
/*
 * Array functions implementation.
 * Authors:
 *  Symisc Systems,devel@symisc.net.
 *  Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *  Stable.
 */
/*
 * bool sort(array &$array[,int $sort_flags = SORT_REGULAR ] )
 * Sort an array.
 * Parameters
 *  $array
 *   The input array.
 * $sort_flags
 *  The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *  Sorting type flags:
 *   SORT_REGULAR - compare items normally (don't change types)
 *   SORT_NUMERIC - compare items numerically
 *   SORT_STRING - compare items as strings
 * Return
 *  TRUE on success or FALSE on failure.
 * 
 */
static int ph7_hashmap_sort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		sxi32 iCmpFlags = 0;
		if( nArg > 1 ){
			/* Extract comparison flags */
			iCmpFlags = ph7_value_to_int(apArg[1]);
			if( iCmpFlags == 3 /* SORT_REGULAR */ ){
				iCmpFlags = 0; /* Standard comparison */
			}
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback1,SX_INT_TO_PTR(iCmpFlags));
		/* Rehash [Do not maintain index association as requested by the PHP specification] */
		HashmapSortRehash(pMap);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool asort(array &$array[,int $sort_flags = SORT_REGULAR ] )
 *  Sort an array and maintain index association.
 * Parameters
 *  $array
 *   The input array.
 * $sort_flags
 *  The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *  Sorting type flags:
 *   SORT_REGULAR - compare items normally (don't change types)
 *   SORT_NUMERIC - compare items numerically
 *   SORT_STRING - compare items as strings
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_asort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		sxi32 iCmpFlags = 0;
		if( nArg > 1 ){
			/* Extract comparison flags */
			iCmpFlags = ph7_value_to_int(apArg[1]);
			if( iCmpFlags == 3 /* SORT_REGULAR */ ){
				iCmpFlags = 0; /* Standard comparison */
			}
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback1,SX_INT_TO_PTR(iCmpFlags));
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool arsort(array &$array[,int $sort_flags = SORT_REGULAR ] )
 *  Sort an array in reverse order and maintain index association.
 * Parameters
 *  $array
 *   The input array.
 * $sort_flags
 *  The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *  Sorting type flags:
 *   SORT_REGULAR - compare items normally (don't change types)
 *   SORT_NUMERIC - compare items numerically
 *   SORT_STRING - compare items as strings
 * Return
 *  TRUE on success or FALSE on failure. 
 */
static int ph7_hashmap_arsort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		sxi32 iCmpFlags = 0;
		if( nArg > 1 ){
			/* Extract comparison flags */
			iCmpFlags = ph7_value_to_int(apArg[1]);
			if( iCmpFlags == 3 /* SORT_REGULAR */ ){
				iCmpFlags = 0; /* Standard comparison */
			}
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback3,SX_INT_TO_PTR(iCmpFlags));
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool ksort(array &$array[,int $sort_flags = SORT_REGULAR ] )
 *  Sort an array by key.
 * Parameters
 *  $array
 *   The input array.
 * $sort_flags
 *  The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *  Sorting type flags:
 *   SORT_REGULAR - compare items normally (don't change types)
 *   SORT_NUMERIC - compare items numerically
 *   SORT_STRING - compare items as strings
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_ksort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		sxi32 iCmpFlags = 0;
		if( nArg > 1 ){
			/* Extract comparison flags */
			iCmpFlags = ph7_value_to_int(apArg[1]);
			if( iCmpFlags == 3 /* SORT_REGULAR */ ){
				iCmpFlags = 0; /* Standard comparison */
			}
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback2,SX_INT_TO_PTR(iCmpFlags));
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool krsort(array &$array[,int $sort_flags = SORT_REGULAR ] )
 *  Sort an array by key in reverse order.
 * Parameters
 *  $array
 *   The input array.
 * $sort_flags
 *  The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *  Sorting type flags:
 *   SORT_REGULAR - compare items normally (don't change types)
 *   SORT_NUMERIC - compare items numerically
 *   SORT_STRING - compare items as strings
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_krsort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		sxi32 iCmpFlags = 0;
		if( nArg > 1 ){
			/* Extract comparison flags */
			iCmpFlags = ph7_value_to_int(apArg[1]);
			if( iCmpFlags == 3 /* SORT_REGULAR */ ){
				iCmpFlags = 0; /* Standard comparison */
			}
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback5,SX_INT_TO_PTR(iCmpFlags));
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool rsort(array &$array[,int $sort_flags = SORT_REGULAR ] )
 * Sort an array in reverse order.
 * Parameters
 *  $array
 *   The input array.
 * $sort_flags
 *  The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *  Sorting type flags:
 *   SORT_REGULAR - compare items normally (don't change types)
 *   SORT_NUMERIC - compare items numerically
 *   SORT_STRING - compare items as strings
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_rsort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		sxi32 iCmpFlags = 0;
		if( nArg > 1 ){
			/* Extract comparison flags */
			iCmpFlags = ph7_value_to_int(apArg[1]);
			if( iCmpFlags == 3 /* SORT_REGULAR */ ){
				iCmpFlags = 0; /* Standard comparison */
			}
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback3,SX_INT_TO_PTR(iCmpFlags));
		/* Rehash [Do not maintain index association as requested by the PHP specification] */
		HashmapSortRehash(pMap);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool usort(array &$array,callable $cmp_function)
 *  Sort an array by values using a user-defined comparison function.
 * Parameters
 *  $array
 *   The input array.
 * $cmp_function
 *  The comparison function must return an integer less than, equal to, or greater
 *  than zero if the first argument is considered to be respectively less than, equal
 *  to, or greater than the second.
 *    int callback ( mixed $a, mixed $b )
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_usort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		ph7_value *pCallback = 0;
		ProcNodeCmp xCmp;
		xCmp = HashmapCmpCallback4; /* User-defined function as the comparison callback */
		if( nArg > 1 && ph7_value_is_callable(apArg[1]) ){
			/* Point to the desired callback */
			pCallback = apArg[1];
		}else{
			/* Use the default comparison function */
			xCmp = HashmapCmpCallback1;
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,xCmp,pCallback);
		/* Rehash [Do not maintain index association as requested by the PHP specification] */
		HashmapSortRehash(pMap);
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool uasort(array &$array,callable $cmp_function)
 *  Sort an array by values using a user-defined comparison function
 *  and maintain index association.
 * Parameters
 *  $array
 *   The input array.
 * $cmp_function
 *  The comparison function must return an integer less than, equal to, or greater
 *  than zero if the first argument is considered to be respectively less than, equal
 *  to, or greater than the second.
 *    int callback ( mixed $a, mixed $b )
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_uasort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		ph7_value *pCallback = 0;
		ProcNodeCmp xCmp;
		xCmp = HashmapCmpCallback4; /* User-defined function as the comparison callback */
		if( nArg > 1 && ph7_value_is_callable(apArg[1]) ){
			/* Point to the desired callback */
			pCallback = apArg[1];
		}else{
			/* Use the default comparison function */
			xCmp = HashmapCmpCallback1;
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,xCmp,pCallback);
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool uksort(array &$array,callable $cmp_function)
 *  Sort an array by keys using a user-defined comparison
 *  function and maintain index association.
 * Parameters
 *  $array
 *   The input array.
 * $cmp_function
 *  The comparison function must return an integer less than, equal to, or greater
 *  than zero if the first argument is considered to be respectively less than, equal
 *  to, or greater than the second.
 *    int callback ( mixed $a, mixed $b )
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_uksort(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		ph7_value *pCallback = 0;
		ProcNodeCmp xCmp;
		xCmp = HashmapCmpCallback6; /* User-defined function as the comparison callback */
		if( nArg > 1 && ph7_value_is_callable(apArg[1]) ){
			/* Point to the desired callback */
			pCallback = apArg[1];
		}else{
			/* Use the default comparison function */
			xCmp = HashmapCmpCallback2;
		}
		/* Do the merge sort */
		HashmapMergeSort(pMap,xCmp,pCallback);
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * bool shuffle(array &$array)
 *  shuffles (randomizes the order of the elements in) an array. 
 * Parameters
 *  $array
 *   The input array.
 * Return
 *  TRUE on success or FALSE on failure.
 * 
 */
static int ph7_hashmap_shuffle(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry > 1 ){
		/* Do the merge sort */
		HashmapMergeSort(pMap,HashmapCmpCallback7,0);
		/* Fix the last link broken by the merge */
		while(pMap->pLast->pPrev){
			pMap->pLast = pMap->pLast->pPrev;
		}
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * int count(array $var [, int $mode = COUNT_NORMAL ])
 *   Count all elements in an array, or something in an object.
 * Parameters
 *  $var
 *   The array or the object.
 * $mode
 *  If the optional mode parameter is set to COUNT_RECURSIVE (or 1), count()
 *  will recursively count the array. This is particularly useful for counting 
 *  all the elements of a multidimensional array. count() does not detect infinite
 *  recursion.
 * Return
 *  Returns the number of elements in the array.
 */
static int ph7_hashmap_count(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int bRecursive = FALSE;
	sxi64 iCount;
	if( nArg < 1 ){
		/* Missing arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	if( !ph7_value_is_array(apArg[0]) ){
		/* TICKET 1433-19: Handle objects */
		int res = !ph7_value_is_null(apArg[0]);
		ph7_result_int(pCtx,res);
		return PH7_OK;
	}
	if( nArg > 1 ){
		/* Recursive count? */
		bRecursive = ph7_value_to_int(apArg[1]) == 1 /* COUNT_RECURSIVE */;
	}
	/* Count */
	iCount = HashmapCount((ph7_hashmap *)apArg[0]->x.pOther,bRecursive,0);
	ph7_result_int64(pCtx,iCount);
	return PH7_OK;
}
/*
 * bool array_key_exists(value $key,array $search)
 *  Checks if the given key or index exists in the array.
 * Parameters
 * $key
 *   Value to check.
 * $search
 *  An array with keys to check.
 * Return
 *  TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_key_exists(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[1]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the lookup */
	rc = PH7_HashmapLookup((ph7_hashmap *)apArg[1]->x.pOther,apArg[0],0);
	/* lookup result */
	ph7_result_bool(pCtx,rc == SXRET_OK ? 1 : 0);
	return PH7_OK;
}
/*
 * value array_pop(array $array)
 *   POP the last inserted element from the array.
 * Parameter
 *  The array to get the value from.
 * Return
 *  Poped value or NULL on failure.
 */
static int ph7_hashmap_pop(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry < 1 ){
		/* Noting to pop,return NULL */
		ph7_result_null(pCtx);
	}else{
		ph7_hashmap_node *pLast = pMap->pLast;
		ph7_value *pObj;
		pObj = HashmapExtractNodeValue(pLast);
		if( pObj ){
			/* Node value */
			ph7_result_value(pCtx,pObj);
			/* Unlink the node */
			PH7_HashmapUnlinkNode(pLast,TRUE);
		}else{
			ph7_result_null(pCtx);
		}
		/* Reset the cursor */
		pMap->pCur = pMap->pFirst;
	}
	return PH7_OK;
}
/*
 * int array_push($array,$var,...)
 *   Push one or more elements onto the end of array. (Stack insertion)
 * Parameters
 *  array
 *    The input array.
 *  var
 *   On or more value to push.
 * Return
 *  New array count (including old items).
 */
static int ph7_hashmap_push(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	sxi32 rc;
	int i;
	if( nArg < 1 ){
		/* Missing arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Start pushing given values */
	for( i = 1 ; i < nArg ; ++i ){
		rc = PH7_HashmapInsert(pMap,0,apArg[i]);
		if( rc != SXRET_OK ){
			break;
		}
	}
	/* Return the new count */
	ph7_result_int64(pCtx,(sxi64)pMap->nEntry);
	return PH7_OK;
}
/*
 * value array_shift(array $array)
 *   Shift an element off the beginning of array.
 * Parameter
 *  The array to get the value from.
 * Return
 *  Shifted value or NULL on failure.
 */
static int ph7_hashmap_shift(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry < 1 ){
		/* Empty hashmap,return NULL */
		ph7_result_null(pCtx);
	}else{
		ph7_hashmap_node *pEntry = pMap->pFirst;
		ph7_value *pObj;
		sxu32 n;
		pObj = HashmapExtractNodeValue(pEntry);
		if( pObj ){
			/* Node value */
			ph7_result_value(pCtx,pObj);
			/* Unlink the first node */
			PH7_HashmapUnlinkNode(pEntry,TRUE);
		}else{
			ph7_result_null(pCtx);
		}
		/* Rehash all int keys */
		n = pMap->nEntry;
		pEntry = pMap->pFirst;
		pMap->iNextIdx = 0; /* Reset the automatic index */
		for(;;){
			if( n < 1 ){
				break;
			}
			if( pEntry->iType == HASHMAP_INT_NODE ){
				HashmapRehashIntNode(pEntry);
			}
			/* Point to the next entry */
			pEntry = pEntry->pPrev; /* Reverse link */
			n--;
		}
		/* Reset the cursor */
		pMap->pCur = pMap->pFirst;
	}
	return PH7_OK;
}
/*
 * Extract the node cursor value.
 */
static sxi32 HashmapCurrentValue(ph7_context *pCtx,ph7_hashmap *pMap,int iDirection)
{
	ph7_hashmap_node *pCur = pMap->pCur;
	ph7_value *pVal;
	if( pCur == 0 ){
		/* Cursor does not point to anything,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( iDirection != 0 ){
		if( iDirection > 0 ){
			/* Point to the next entry */
			pMap->pCur = pCur->pPrev; /* Reverse link */
			pCur = pMap->pCur;
		}else{
			/* Point to the previous entry */
			pMap->pCur = pCur->pNext; /* Reverse link */
			pCur = pMap->pCur;
		}
		if( pCur == 0 ){
			/* End of input reached,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
	}		
	/* Point to the desired element */
	pVal = HashmapExtractNodeValue(pCur);
	if( pVal ){
		ph7_result_value(pCtx,pVal);
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * value current(array $array)
 *  Return the current element in an array.
 * Parameter
 *  $input: The input array.
 * Return
 *  The current() function simply returns the value of the array element that's currently
 *  being pointed to by the internal pointer. It does not move the pointer in any way.
 *  If the internal pointer points beyond the end of the elements list or the array 
 *  is empty, current() returns FALSE. 
 */
static int ph7_hashmap_current(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	HashmapCurrentValue(&(*pCtx),(ph7_hashmap *)apArg[0]->x.pOther,0);
	return PH7_OK;
}
/*
 * value next(array $input)
 *  Advance the internal array pointer of an array.
 * Parameter
 *  $input: The input array.
 * Return
 *  next() behaves like current(), with one difference. It advances the internal array 
 *  pointer one place forward before returning the element value. That means it returns 
 *  the next array value and advances the internal array pointer by one. 
 */
static int ph7_hashmap_next(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	HashmapCurrentValue(&(*pCtx),(ph7_hashmap *)apArg[0]->x.pOther,1);
	return PH7_OK;
}
/* 
 * value prev(array $input)
 *  Rewind the internal array pointer.
 * Parameter
 *  $input: The input array.
 * Return
 *  Returns the array value in the previous place that's pointed
 *  to by the internal array pointer, or FALSE if there are no more
 *  elements. 
 */
static int ph7_hashmap_prev(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	HashmapCurrentValue(&(*pCtx),(ph7_hashmap *)apArg[0]->x.pOther,-1);
	return PH7_OK;
}
/* 
 * value end(array $input)
 *  Set the internal pointer of an array to its last element.
 * Parameter
 *  $input: The input array.
 * Return
 *  Returns the value of the last element or FALSE for empty array. 
 */
static int ph7_hashmap_end(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Point to the last node */
	pMap->pCur = pMap->pLast;
	/* Return the last node value */
	HashmapCurrentValue(&(*pCtx),pMap,0);
	return PH7_OK;
}
/* 
 * value reset(array $array )
 *  Set the internal pointer of an array to its first element.
 * Parameter
 *  $input: The input array.
 * Return
 *  Returns the value of the first array element,or FALSE if the array is empty. 
 */
static int ph7_hashmap_reset(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Point to the first node */
	pMap->pCur = pMap->pFirst;
	/* Return the last node value if available */
	HashmapCurrentValue(&(*pCtx),pMap,0);
	return PH7_OK;
}
/*
 * value key(array $array)
 *   Fetch a key from an array
 * Parameter
 *  $input
 *   The input array.
 * Return
 *  The key() function simply returns the key of the array element that's currently
 *  being pointed to by the internal pointer. It does not move the pointer in any way.
 *  If the internal pointer points beyond the end of the elements list or the array 
 *  is empty, key() returns NULL. 
 */
static int ph7_hashmap_simple_key(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pCur;
	ph7_hashmap *pMap;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	pCur = pMap->pCur;
	if( pCur == 0 ){
		/* Cursor does not point to anything,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( pCur->iType == HASHMAP_INT_NODE){
		/* Key is integer */
		ph7_result_int64(pCtx,pCur->xKey.iKey);
	}else{
		/* Key is blob */
		ph7_result_string(pCtx,
			(const char *)SyBlobData(&pCur->xKey.sKey),(int)SyBlobLength(&pCur->xKey.sKey));
	}
	return PH7_OK;
}
/*
 * array each(array $input)
 *  Return the current key and value pair from an array and advance the array cursor.
 * Parameter
 *  $input
 *    The input array.
 * Return
 *  Returns the current key and value pair from the array array. This pair is returned 
 *  in a four-element array, with the keys 0, 1, key, and value. Elements 0 and key 
 *  contain the key name of the array element, and 1 and value contain the data.
 *  If the internal pointer for the array points past the end of the array contents
 *  each() returns FALSE. 
 */
static int ph7_hashmap_each(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pCur;
	ph7_hashmap *pMap;
	ph7_value *pArray;
	ph7_value *pVal;
	ph7_value sKey;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation that describe the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->pCur == 0 ){
		/* Cursor does not point to anything,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pCur = pMap->pCur;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pVal = HashmapExtractNodeValue(pCur);
	/* Insert the current value */
	ph7_array_add_intkey_elem(pArray,1,pVal);
	ph7_array_add_strkey_elem(pArray,"value",pVal);
	/* Make the key */
	if( pCur->iType == HASHMAP_INT_NODE ){
		PH7_MemObjInitFromInt(pMap->pVm,&sKey,pCur->xKey.iKey);
	}else{
		PH7_MemObjInitFromString(pMap->pVm,&sKey,0);
		PH7_MemObjStringAppend(&sKey,(const char *)SyBlobData(&pCur->xKey.sKey),SyBlobLength(&pCur->xKey.sKey));
	}
	/* Insert the current key */
	ph7_array_add_intkey_elem(pArray,0,&sKey);
	ph7_array_add_strkey_elem(pArray,"key",&sKey);
	PH7_MemObjRelease(&sKey);
	/* Advance the cursor */
	pMap->pCur = pCur->pPrev; /* Reverse link */
	/* Return the current entry */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array range(int $start,int $limit,int $step)
 *  Create an array containing a range of elements
 * Parameter
 *  start
 *   First value of the sequence.
 *  limit
 *   The sequence is ended upon reaching the limit value.
 *  step
 *  If a step value is given, it will be used as the increment between elements in the sequence.
 *  step should be given as a positive number. If not specified, step will default to 1.
 * Return
 *  An array of elements from start to limit, inclusive.
 * NOTE:
 *  Only 32/64 bit integer key is supported.
 */
static int ph7_hashmap_range(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pValue,*pArray;
	sxi64 iOfft,iLimit;
	int iStep = 1;

	iOfft = iLimit = 0; /* cc -O6 */
	if( nArg > 0 ){
		/* Extract the offset */
		iOfft = ph7_value_to_int64(apArg[0]);
		if( nArg > 1 ){
			/* Extract the limit */
			iLimit = ph7_value_to_int64(apArg[1]);
			if( nArg > 2 ){
				/* Extract the increment */
				iStep = ph7_value_to_int(apArg[2]);
				if( iStep < 1 ){
					/* Only positive number are allowed */
					iStep = 1;
				}
			}
		}
	}
	/* Element container */
	pValue = ph7_context_new_scalar(pCtx);
	/* Create the new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Start filling */
	while( iOfft <= iLimit ){
		ph7_value_int64(pValue,iOfft);
		/* Perform the insertion */
		ph7_array_add_elem(pArray,0/* Automatic index assign*/,pValue);
		/* Increment */
		iOfft += iStep;
	}
	/* Return the new array */
	ph7_result_value(pCtx,pArray);
	/* Dont'worry about freeing 'pValue',it will be released automatically
	 * by the virtual machine as soon we return from this foreign function.
	 */
	return PH7_OK;
}
/*
 * array array_values(array $input)
 *   Returns all the values from the input array and indexes numerically the array.
 * Parameters
 *   input: The input array.
 * Return
 *  An indexed array of values or NULL on failure.
 */
static int ph7_hashmap_values(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pNode;
	ph7_hashmap *pMap;
	ph7_value *pArray;
	ph7_value *pObj;
	sxu32 n;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation that describe the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pNode = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; ++n ){
		pObj = HashmapExtractNodeValue(pNode);
		if( pObj ){
			/* perform the insertion */
			ph7_array_add_elem(pArray,0/* Automatic index assign */,pObj);
		}
		/* Point to the next entry */
		pNode = pNode->pPrev; /* Reverse link */
	}
	/* return the new array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_keys(array $input [, val $search_value [, bool $strict = false ]] )
 *  Return all the keys or a subset of the keys of an array.
 * Parameters
 *  $input
 *   An array containing keys to return.
 * $search_value
 *   If specified, then only keys containing these values are returned.
 * $strict
 *   Determines if strict comparison (===) should be used during the search. 
 * Return
 *  An array of all the keys in input or NULL on failure.
 */
static int ph7_hashmap_keys(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pNode;
	ph7_hashmap *pMap;
	ph7_value *pArray;
	ph7_value sObj;
	ph7_value sVal;
	SyString sKey;
	int bStrict;
	sxi32 rc;
	sxu32 n;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	bStrict = FALSE;
	if( nArg > 2 && ph7_value_is_bool(apArg[2]) ){
		bStrict = ph7_value_to_bool(apArg[2]);
	}
	/* Perform the requested operation */
	pNode = pMap->pFirst;
	PH7_MemObjInit(pMap->pVm,&sVal);
	for( n = 0 ; n < pMap->nEntry ; ++n ){
		if( pNode->iType == HASHMAP_INT_NODE ){
			PH7_MemObjInitFromInt(pMap->pVm,&sObj,pNode->xKey.iKey);
		}else{
			SyStringInitFromBuf(&sKey,SyBlobData(&pNode->xKey.sKey),SyBlobLength(&pNode->xKey.sKey));
			PH7_MemObjInitFromString(pMap->pVm,&sObj,&sKey);
		}
		rc = 0;
		if( nArg > 1 ){
			ph7_value *pValue = HashmapExtractNodeValue(pNode);
			if( pValue ){
				PH7_MemObjLoad(pValue,&sVal);
				/* Filter key */
				rc = ph7_value_compare(&sVal,apArg[1],bStrict);
				PH7_MemObjRelease(pValue);
			}
		}
		if( rc == 0 ){
			/* Perform the insertion */
			ph7_array_add_elem(pArray,0,&sObj);
		}
		PH7_MemObjRelease(&sObj);
		/* Point to the next entry */
		pNode = pNode->pPrev; /* Reverse link */
	}
	/* return the new array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * bool array_same(array $arr1,array $arr2)
 *  Return TRUE if the given arrays are the same instance.
 *  This function is useful under PH7 since arrays are passed
 *  by reference unlike the zend engine which use pass by values.
 * Parameters
 *  $arr1
 *   First array
 *  $arr2
 *   Second array
 * Return
 *  TRUE if the arrays are the same instance.FALSE otherwise.
 * Note
 *  This function is a symisc eXtension.
 */
static int ph7_hashmap_same(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *p1,*p2;
	int rc;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) || !ph7_value_is_array(apArg[1]) ){
		/* Missing or invalid arguments,return FALSE*/
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the hashmaps */
	p1 = (ph7_hashmap *)apArg[0]->x.pOther;
	p2 = (ph7_hashmap *)apArg[1]->x.pOther;
	rc = (p1 == p2);
	/* Same instance? */
	ph7_result_bool(pCtx,rc);
	return PH7_OK;
}
/*
 * array array_merge(array $array1,...)
 *  Merge one or more arrays.
 * Parameters
 *  $array1
 *    Initial array to merge.
 *  ...
 *   More array to merge.
 * Return
 *  The resulting array.
 */
static int ph7_hashmap_merge(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap,*pSrc;
	ph7_value *pArray;
	int i;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the hashmap */
	pMap = (ph7_hashmap *)pArray->x.pOther;
	/* Start merging */
	for( i = 0 ; i < nArg ; i++ ){
		/* Make sure we are dealing with a valid hashmap */
		if( !ph7_value_is_array(apArg[i]) ){
			/* Insert scalar value */
			ph7_array_add_elem(pArray,0,apArg[i]);
		}else{
			pSrc = (ph7_hashmap *)apArg[i]->x.pOther;
			/* Merge the two hashmaps */
			HashmapMerge(pSrc,pMap);
		}
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_copy(array $source)
 *  Make a blind copy of the target array.
 * Parameters
 *  $source
 *   Target array
 * Return
 *  Copy of the target array on success.NULL otherwise.
 * Note
 *  This function is a symisc eXtension.
 */
static int ph7_hashmap_copy(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	ph7_value *pArray;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the hashmap */
	pMap = (ph7_hashmap *)pArray->x.pOther;
	if( ph7_value_is_array(apArg[0])){
		/* Point to the internal representation of the source */
		ph7_hashmap *pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
		/* Perform the copy */
		PH7_HashmapDup(pSrc,pMap);
	}else{
		/* Simple insertion */
		PH7_HashmapInsert(pMap,0/* Automatic index assign*/,apArg[0]); 
	}
	/* Return the duplicated array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * bool array_erase(array $source)
 *  Remove all elements from a given array.
 * Parameters
 *  $source
 *   Target array
 * Return
 *  TRUE on success.FALSE otherwise.
 * Note
 *  This function is a symisc eXtension.
 */
static int ph7_hashmap_erase(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	if( nArg < 1 ){
		/* Missing arguments */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Erase */
	PH7_HashmapRelease(pMap,FALSE);
	return PH7_OK;
}
/*
 * array array_slice(array $array,int $offset [,int $length [, bool $preserve_keys = false ]])
 *  Extract a slice of the array.
 * Parameters
 *  $array
 *    The input array.
 * $offset
 *    If offset is non-negative, the sequence will start at that offset in the array.
 *    If offset is negative, the sequence will start that far from the end of the array.
 * $length (optional)
 *    If length is given and is positive, then the sequence will have that many elements 
 *    in it. If length is given and is negative then the sequence will stop that many 
 *   elements from the end of the array. If it is omitted, then the sequence will have
 *   everything from offset up until the end of the array.
 * $preserve_keys (optional)
 *    Note that array_slice() will reorder and reset the array indices by default. 
 *    You can change this behaviour by setting preserve_keys to TRUE.
 * Return
 *   The new slice.
 */
static int ph7_hashmap_slice(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap,*pSrc;
	ph7_hashmap_node *pCur;
	ph7_value *pArray;
	int iLength,iOfft;
	int bPreserve;
	sxi32 rc;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point the internal representation of the target array */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	bPreserve = FALSE;
	/* Get the offset */
	iOfft = ph7_value_to_int(apArg[1]);
	if( iOfft < 0 ){
		iOfft = (int)pSrc->nEntry + iOfft;
	}
	if( iOfft < 0 || iOfft > (int)pSrc->nEntry ){
		/* Invalid offset,return the last entry */
		iOfft = (int)pSrc->nEntry - 1;
	}
	/* Get the length */
	iLength = (int)pSrc->nEntry - iOfft;
	if( nArg > 2 ){
		iLength = ph7_value_to_int(apArg[2]);
		if( iLength < 0 ){
			iLength = ((int)pSrc->nEntry + iLength) - iOfft;
		}
		if( iLength < 0 || iOfft + iLength >= (int)pSrc->nEntry ){
			iLength = (int)pSrc->nEntry - iOfft;
		}
		if( nArg > 3 && ph7_value_is_bool(apArg[3]) ){
			bPreserve = ph7_value_to_bool(apArg[3]);
		}
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( iLength < 1 ){
		/* Don't bother processing,return the empty array */
		ph7_result_value(pCtx,pArray);
		return PH7_OK;
	}
	/* Point to the desired entry */
	pCur = pSrc->pFirst;
	for(;;){
		if( iOfft < 1 ){
			break;
		}
		/* Point to the next entry */
		pCur = pCur->pPrev; /* Reverse link */
		iOfft--;
	}
	/* Point to the internal representation of the hashmap */
	pMap = (ph7_hashmap *)pArray->x.pOther;
	for(;;){
		if( iLength < 1 ){
			break;
		}
		rc = HashmapInsertNode(pMap,pCur,bPreserve);
		if( rc != SXRET_OK ){
			break;
		}
		/* Point to the next entry */
		pCur = pCur->pPrev; /* Reverse link */
		iLength--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_splice(array $array,int $offset [,int $length [,value $replacement ]])
 *  Remove a portion of the array and replace it with something else.
 * Parameters
 *  $array
 *    The input array.
 * $offset
 *    If offset is positive then the start of removed portion is at that offset from 
 *    the beginning of the input array. If offset is negative then it starts that far
 *    from the end of the input array. 
 * $length (optional)
 *    If length is omitted, removes everything from offset to the end of the array.
 *    If length is specified and is positive, then that many elements will be removed.
 *    If length is specified and is negative then the end of the removed portion will 
 *    be that many elements from the end of the array.
 * $replacement (optional)
 *  If replacement array is specified, then the removed elements are replaced 
 *  with elements from this array.
 *  If offset and length are such that nothing is removed, then the elements 
 *  from the replacement array are inserted in the place specified by the offset.
 *  Note that keys in replacement array are not preserved.
 *  If replacement is just one element it is not necessary to put array() around
 *  it, unless the element is an array itself, an object or NULL.
 * Return
 *   A new array consisting of the extracted elements. 
 */
static int ph7_hashmap_splice(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pCur,*pPrev,*pRnode;
	ph7_value *pArray,*pRvalue,*pOld;
	ph7_hashmap *pMap,*pSrc,*pRep;
	int iLength,iOfft;
	sxi32 rc;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point the internal representation of the target array */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Get the offset */
	iOfft = ph7_value_to_int(apArg[1]);
	if( iOfft < 0 ){
		iOfft = (int)pSrc->nEntry + iOfft;
	}
	if( iOfft < 0 || iOfft > (int)pSrc->nEntry ){
		/* Invalid offset,remove the last entry */
		iOfft = (int)pSrc->nEntry - 1;
	}
	/* Get the length */
	iLength = (int)pSrc->nEntry - iOfft;
	if( nArg > 2 ){
		iLength = ph7_value_to_int(apArg[2]);
		if( iLength < 0 ){
			iLength = ((int)pSrc->nEntry + iLength) - iOfft;
		}
		if( iLength < 0 || iOfft + iLength >= (int)pSrc->nEntry ){
			iLength = (int)pSrc->nEntry - iOfft;
		}
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( iLength < 1 ){
		/* Don't bother processing,return the empty array */
		ph7_result_value(pCtx,pArray);
		return PH7_OK;
	}
	/* Point to the desired entry */
	pCur = pSrc->pFirst;
	for(;;){
		if( iOfft < 1 ){
			break;
		}
		/* Point to the next entry */
		pCur = pCur->pPrev; /* Reverse link */
		iOfft--;
	}
	pRep = 0;
	if( nArg > 3 ){
		if( !ph7_value_is_array(apArg[3]) ){
			/* Perform an array cast */
			PH7_MemObjToHashmap(apArg[3]);
			if(ph7_value_is_array(apArg[3])){
				pRep = (ph7_hashmap *)apArg[3]->x.pOther;
			}
		}else{
			pRep = (ph7_hashmap *)apArg[3]->x.pOther;
		}
		if( pRep ){
			/* Reset the loop cursor */
			pRep->pCur = pRep->pFirst;
		}
	}
	/* Point to the internal representation of the hashmap */
	pMap = (ph7_hashmap *)pArray->x.pOther;
	for(;;){
		if( iLength < 1 ){
			break;
		}
		pPrev = pCur->pPrev;
		rc = HashmapInsertNode(pMap,pCur,FALSE);
		if( pRep && (pRnode = PH7_HashmapGetNextEntry(pRep)) != 0 ){
			/* Extract node value */
			pRvalue = HashmapExtractNodeValue(pRnode);
			/* Replace the old node */
			pOld = HashmapExtractNodeValue(pCur);
			if( pRvalue && pOld ){
				PH7_MemObjStore(pRvalue,pOld);
			}
		}else{
			/* Unlink the node from the source hashmap */
			PH7_HashmapUnlinkNode(pCur,TRUE);
		}
		if( rc != SXRET_OK ){
			break;
		}
		/* Point to the next entry */
		pCur = pPrev; /* Reverse link */
		iLength--;
	}
	if( pRep ){
		while((pRnode = PH7_HashmapGetNextEntry(pRep)) != 0 ){
			HashmapInsertNode(pSrc,pRnode,FALSE);
		}
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * bool in_array(value $needle,array $haystack[,bool $strict = FALSE ])
 *  Checks if a value exists in an array.
 * Parameters
 *  $needle
 *   The searched value.
 *   Note:
 *    If needle is a string, the comparison is done in a case-sensitive manner.
 * $haystack
 *  The target array.
 * $strict
 *  If the third parameter strict is set to TRUE then the in_array() function
 *  will also check the types of the needle in the haystack.
 */
static int ph7_hashmap_in_array(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pNeedle;
	int bStrict;
	int rc;
	if( nArg < 2 ){
		/* Missing argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pNeedle = apArg[0];
	bStrict = 0;
	if( nArg > 2 ){
		bStrict = ph7_value_to_bool(apArg[2]);
	}
	if( !ph7_value_is_array(apArg[1]) ){
		/* haystack must be an array,perform a standard comparison */ 
		rc = ph7_value_compare(pNeedle,apArg[1],bStrict);
		/* Set the comparison result */
		ph7_result_bool(pCtx,rc == 0);
		return PH7_OK;
	}
	/* Perform the lookup */
	rc = HashmapFindValue((ph7_hashmap *)apArg[1]->x.pOther,pNeedle,0,bStrict);
	/* Lookup result */
	ph7_result_bool(pCtx,rc == SXRET_OK);
	return PH7_OK;
}
/*
 * value array_search(value $needle,array $haystack[,bool $strict = false ])
 *  Searches the array for a given value and returns the corresponding key if successful.
 * Parameters
 * $needle
 *   The searched value.
 * $haystack
 *   The array.
 * $strict
 *  If the third parameter strict is set to TRUE then the array_search() function 
 *  will search for identical elements in the haystack. This means it will also check
 *  the types of the needle in the haystack, and objects must be the same instance.
 * Return
 *  Returns the key for needle if it is found in the array, FALSE otherwise. 
 */
static int ph7_hashmap_search(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pVal,sNeedle;
	ph7_hashmap *pMap;
	ph7_value sVal;
	int bStrict;
	sxu32 n;
	int rc;
	if( nArg < 2 ){
		/* Missing argument,return FALSE*/
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	bStrict = FALSE;
	if( !ph7_value_is_array(apArg[1]) ){
		/* hasystack must be an array,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 2 && ph7_value_is_bool(apArg[2]) ){
		bStrict = ph7_value_to_bool(apArg[2]);
	}
	/* Point to the internal representation of the internal hashmap */
	pMap = (ph7_hashmap *)apArg[1]->x.pOther;
	/* Perform a linear search since we cannot sort the hashmap based on values */
	PH7_MemObjInit(pMap->pVm,&sVal);
	PH7_MemObjInit(pMap->pVm,&sNeedle);
	pEntry = pMap->pFirst;
	n = pMap->nEntry;
	for(;;){
		if( !n ){
			break;
		}
		/* Extract node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			/* Make a copy of the vuurent values since the comparison routine
			 * can change their type.
			 */
			PH7_MemObjLoad(pVal,&sVal);
			PH7_MemObjLoad(apArg[0],&sNeedle);
			rc = PH7_MemObjCmp(&sNeedle,&sVal,bStrict,0);
			PH7_MemObjRelease(&sVal);
			PH7_MemObjRelease(&sNeedle);
			if( rc == 0 ){
				/* Match found,return key */
				if( pEntry->iType == HASHMAP_INT_NODE){
					/* INT key */
					ph7_result_int64(pCtx,pEntry->xKey.iKey);
				}else{
					SyBlob *pKey = &pEntry->xKey.sKey;
					/* Blob key */
					ph7_result_string(pCtx,(const char *)SyBlobData(pKey),(int)SyBlobLength(pKey));
				}
				return PH7_OK;
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* No such value,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * array array_diff(array $array1,array $array2,...)
 *  Computes the difference of arrays.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * Return
 *  Returns an array containing all the entries from array1 that
 *  are not present in any of the other arrays.
 */
static int ph7_hashmap_diff(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg == 1 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the diff */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			for( i = 1 ; i < nArg ; i++ ){
				if( !ph7_value_is_array(apArg[i])) {
					/* ignore */
					continue;
				}
				/* Point to the internal representation of the hashmap */
				pMap = (ph7_hashmap *)apArg[i]->x.pOther;
				/* Perform the lookup */
				rc = HashmapFindValue(pMap,pVal,0,TRUE);
				if( rc == SXRET_OK ){
					/* Value exist */
					break;
				}
			}
			if( i >= nArg ){
				/* Perform the insertion */
				HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_udiff(array $array1,array $array2,...,$callback)
 *  Computes the difference of arrays by using a callback function for data comparison.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against.
 * $callback
 *  The callback comparison function.
 *  The comparison function must return an integer less than, equal to, or greater than zero
 *  if the first argument is considered to be respectively less than, equal to, or greater 
 *  than the second.
 *     int callback ( mixed $a, mixed $b )
 * Return
 *  Returns an array containing all the entries from array1 that
 *  are not present in any of the other arrays.
 */
static int ph7_hashmap_udiff(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pCallback;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the callback */
	pCallback = apArg[nArg - 1];
	if( nArg == 2 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the diff */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			for( i = 1 ; i < nArg - 1; i++ ){
				if( !ph7_value_is_array(apArg[i])) {
					/* ignore */
					continue;
				}
				/* Point to the internal representation of the hashmap */
				pMap = (ph7_hashmap *)apArg[i]->x.pOther;
				/* Perform the lookup */
				rc = HashmapFindValueByCallback(pMap,pVal,pCallback,0);
				if( rc == SXRET_OK ){
					/* Value exist */
					break;
				}
			}
			if( i >= (nArg - 1)){
				/* Perform the insertion */
				HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_diff_assoc(array $array1,array $array2,...)
 *  Computes the difference of arrays with additional index check.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * Return
 *  Returns an array containing all the entries from array1 that
 *  are not present in any of the other arrays.
 */
static int ph7_hashmap_diff_assoc(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pN1,*pN2,*pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg == 1 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the diff */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	pN1 = pN2 = 0;
	for(;;){
		if( n < 1 ){
			break;
		}
		for( i = 1 ; i < nArg ; i++ ){
			if( !ph7_value_is_array(apArg[i])) {
				/* ignore */
				continue;
			}
			/* Point to the internal representation of the hashmap */
			pMap = (ph7_hashmap *)apArg[i]->x.pOther;
			/* Perform a key lookup first */
			if( pEntry->iType == HASHMAP_INT_NODE ){
				rc = HashmapLookupIntKey(pMap,pEntry->xKey.iKey,&pN1);
			}else{
				rc = HashmapLookupBlobKey(pMap,SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey),&pN1);
			}
			if( rc != SXRET_OK ){
				/* No such key,break immediately */
				break;
			}
			/* Extract node value */
			pVal = HashmapExtractNodeValue(pEntry);
			if( pVal ){
				/* Perform the lookup */
				rc = HashmapFindValue(pMap,pVal,&pN2,TRUE);
				if( rc != SXRET_OK || pN1 != pN2 ){
					/* Value does not exist */
					break;
				}
			}
		}
		if( i < nArg ){
			/* Perform the insertion */
			HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_diff_uassoc(array $array1,array $array2,...,callback $key_compare_func)
 *  Computes the difference of arrays with additional index check which is performed
 *  by a user supplied callback function.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against.
 *  $key_compare_func
 *   Callback function to use. The callback function must return an integer
 *   less than, equal to, or greater than zero if the first argument is considered
 *   to be respectively less than, equal to, or greater than the second.
 * Return
 *  Returns an array containing all the entries from array1 that
 *  are not present in any of the other arrays.
 */
static int ph7_hashmap_diff_uassoc(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pN1,*pN2,*pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pCallback;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;

	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the callback */
	pCallback = apArg[nArg - 1];
	if( nArg == 2 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the diff */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	pN1 = pN2 = 0; /* cc warning */
	for(;;){
		if( n < 1 ){
			break;
		}
		for( i = 1 ; i < nArg - 1; i++ ){
			if( !ph7_value_is_array(apArg[i])) {
				/* ignore */
				continue;
			}
			/* Point to the internal representation of the hashmap */
			pMap = (ph7_hashmap *)apArg[i]->x.pOther;
			/* Perform a key lookup first */
			if( pEntry->iType == HASHMAP_INT_NODE ){
				rc = HashmapLookupIntKey(pMap,pEntry->xKey.iKey,&pN1);
			}else{
				rc = HashmapLookupBlobKey(pMap,SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey),&pN1);
			}
			if( rc != SXRET_OK ){
				/* No such key,break immediately */
				break;
			}
			/* Extract node value */
			pVal = HashmapExtractNodeValue(pEntry);
			if( pVal ){
				/* Invoke the user callback */
				rc = HashmapFindValueByCallback(pMap,pVal,pCallback,&pN2);
				if( rc != SXRET_OK || pN1 != pN2 ){
					/* Value does not exist */
					break;
				}
			}
		}
		if( i < (nArg-1) ){
			/* Perform the insertion */
			HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_diff_key(array $array1 ,array $array2,...)
 *  Computes the difference of arrays using keys for comparison.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * Return
 *  Returns an array containing all the entries from array1 whose keys are not present
 *  in any of the other arrays.
 * Note that NULL is returned on failure.
 */
static int ph7_hashmap_diff_key(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pArray;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg == 1 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the main hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perfrom the diff */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		for( i = 1 ; i < nArg ; i++ ){
			if( !ph7_value_is_array(apArg[i])) {
				/* ignore */
				continue;
			}
			pMap = (ph7_hashmap *)apArg[i]->x.pOther;
			if( pEntry->iType == HASHMAP_BLOB_NODE ){
				SyBlob *pKey = &pEntry->xKey.sKey;
				/* Blob lookup */
				rc = HashmapLookupBlobKey(pMap,SyBlobData(pKey),SyBlobLength(pKey),0);
			}else{
				/* Int lookup */
				rc = HashmapLookupIntKey(pMap,pEntry->xKey.iKey,0);
			}
			if( rc == SXRET_OK ){
				/* Key exists,break immediately */
				break;
			}	
		}
		if( i >= nArg ){
			/* Perform the insertion */
			HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_intersect(array $array1 ,array $array2,...)
 *  Computes the intersection of arrays.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * Return
 *  Returns an array containing all of the values in array1 whose values exist
 *  in all of the parameters. .
 * Note that NULL is returned on failure.
 */
static int ph7_hashmap_intersect(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg == 1 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the intersection */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			for( i = 1 ; i < nArg ; i++ ){
				if( !ph7_value_is_array(apArg[i])) {
					/* ignore */
					continue;
				}
				/* Point to the internal representation of the hashmap */
				pMap = (ph7_hashmap *)apArg[i]->x.pOther;
				/* Perform the lookup */
				rc = HashmapFindValue(pMap,pVal,0,TRUE);
				if( rc != SXRET_OK ){
					/* Value does not exist */
					break;
				}
			}
			if( i >= nArg ){
				/* Perform the insertion */
				HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_intersect_assoc(array $array1 ,array $array2,...)
 *  Computes the intersection of arrays.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * Return
 *  Returns an array containing all of the values in array1 whose values exist
 *  in all of the parameters. .
 * Note that NULL is returned on failure.
 */
static int ph7_hashmap_intersect_assoc(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry,*pN1,*pN2;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg == 1 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the intersection */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	pN1 = pN2 = 0; /* cc warning */
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			for( i = 1 ; i < nArg ; i++ ){
				if( !ph7_value_is_array(apArg[i])) {
					/* ignore */
					continue;
				}
				/* Point to the internal representation of the hashmap */
				pMap = (ph7_hashmap *)apArg[i]->x.pOther;
				/* Perform a key lookup first */
				if( pEntry->iType == HASHMAP_INT_NODE ){
					rc = HashmapLookupIntKey(pMap,pEntry->xKey.iKey,&pN1);
				}else{
					rc = HashmapLookupBlobKey(pMap,SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey),&pN1);
				}
				if( rc != SXRET_OK ){
					/* No such key,break immediately */
					break;
				}
				/* Perform the lookup */
				rc = HashmapFindValue(pMap,pVal,&pN2,TRUE);
				if( rc != SXRET_OK || pN1 != pN2 ){
					/* Value does not exist */
					break;
				}
			}
			if( i >= nArg ){
				/* Perform the insertion */
				HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_intersect_key(array $array1 ,array $array2,...)
 *  Computes the intersection of arrays using keys for comparison.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * Return
 *  Returns an associative array containing all the entries of array1 which
 *  have keys that are present in all arguments.
 * Note that NULL is returned on failure.
 */
static int ph7_hashmap_intersect_key(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pArray;
	sxi32 rc;
	sxu32 n;
	int i;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg == 1 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the main hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perfrom the intersection */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		for( i = 1 ; i < nArg ; i++ ){
			if( !ph7_value_is_array(apArg[i])) {
				/* ignore */
				continue;
			}
			pMap = (ph7_hashmap *)apArg[i]->x.pOther;
			if( pEntry->iType == HASHMAP_BLOB_NODE ){
				SyBlob *pKey = &pEntry->xKey.sKey;
				/* Blob lookup */
				rc = HashmapLookupBlobKey(pMap,SyBlobData(pKey),SyBlobLength(pKey),0);
			}else{
				/* Int key */
				rc = HashmapLookupIntKey(pMap,pEntry->xKey.iKey,0);
			}
			if( rc != SXRET_OK ){
				/* Key does not exists,break immediately */
				break;
			}	
		}
		if( i >= nArg ){
			/* Perform the insertion */
			HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_uintersect(array $array1 ,array $array2,...,$callback)
 *  Computes the intersection of arrays.
 * Parameters
 *  $array1
 *    The array to compare from
 *  $array2
 *    An array to compare against 
 *  $...
 *   More arrays to compare against
 * $callback
 *  The callback comparison function.
 *  The comparison function must return an integer less than, equal to, or greater than zero
 *  if the first argument is considered to be respectively less than, equal to, or greater 
 *  than the second.
 *     int callback ( mixed $a, mixed $b )
 * Return
 *  Returns an array containing all of the values in array1 whose values exist
 *  in all of the parameters. .
 * Note that NULL is returned on failure.
 */
static int ph7_hashmap_uintersect(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc,*pMap;
	ph7_value *pCallback;
	ph7_value *pArray;
	ph7_value *pVal;
	sxi32 rc;
	sxu32 n;
	int i;
	
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the callback */
	pCallback = apArg[nArg - 1];
	if( nArg == 2 ){
		/* Return the first array since we cannot perform a diff */
		ph7_result_value(pCtx,apArg[0]);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the source hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the intersection */
	pEntry = pSrc->pFirst;
	n = pSrc->nEntry;
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract the node value */
		pVal = HashmapExtractNodeValue(pEntry);
		if( pVal ){
			for( i = 1 ; i < nArg - 1; i++ ){
				if( !ph7_value_is_array(apArg[i])) {
					/* ignore */
					continue;
				}
				/* Point to the internal representation of the hashmap */
				pMap = (ph7_hashmap *)apArg[i]->x.pOther;
				/* Perform the lookup */
				rc = HashmapFindValueByCallback(pMap,pVal,pCallback,0);
				if( rc != SXRET_OK ){
					/* Value does not exist */
					break;
				}
			}
			if( i >= (nArg-1) ){
				/* Perform the insertion */
				HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_fill(int $start_index,int $num,var $value)
 *  Fill an array with values.
 * Parameters
 *  $start_index
 *    The first index of the returned array.
 *  $num
 *   Number of elements to insert.
 *  $value
 *    Value to use for filling.
 * Return
 *  The filled array or null on failure.
 */
static int ph7_hashmap_fill(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray;
	int i,nEntry;
	if( nArg < 3 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Total number of entries to insert */
	nEntry = ph7_value_to_int(apArg[1]);
	/* Insert the first entry alone because it have it's own key */
	ph7_array_add_intkey_elem(pArray,ph7_value_to_int(apArg[0]),apArg[2]);
	/* Repeat insertion of the desired value */
	for( i = 1 ; i < nEntry ; i++ ){
		ph7_array_add_elem(pArray,0/*Automatic index assign */,apArg[2]);
	}
	/* Return the filled array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_fill_keys(array $input,var $value)
 *  Fill an array with values, specifying keys.
 * Parameters
 *  $input
 *   Array of values that will be used as key.
 *  $value
 *    Value to use for filling.
 * Return
 *  The filled array or null on failure.
 */
static int ph7_hashmap_fill_keys(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc;
	ph7_value *pArray;
	sxu32 n;
	if( nArg < 2 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pEntry = pSrc->pFirst;
	for( n = 0 ; n < pSrc->nEntry ; n++ ){
		ph7_array_add_elem(pArray,HashmapExtractNodeValue(pEntry),apArg[1]);
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return the filled array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_combine(array $keys,array $values)
 *  Creates an array by using one array for keys and another for its values.
 * Parameters
 *  $keys
 *    Array of keys to be used.
 * $values
 *   Array of values to be used.
 * Return
 *  Returns the combined array. Otherwise FALSE if the number of elements
 *  for each array isn't equal or if one of the given arguments is
 *  not an array. 
 */
static int ph7_hashmap_combine(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pKe,*pVe;
	ph7_hashmap *pKey,*pValue;
	ph7_value *pArray;
	sxu32 n;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) || !ph7_value_is_array(apArg[1]) ){
		/* Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmaps */
	pKey   = (ph7_hashmap *)apArg[0]->x.pOther;
	pValue = (ph7_hashmap *)apArg[1]->x.pOther;
	if( pKey->nEntry != pValue->nEntry ){
		/* Array length differs,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pKe = pKey->pFirst;
	pVe = pValue->pFirst;
	for( n = 0 ; n < pKey->nEntry ; n++ ){
		ph7_array_add_elem(pArray,HashmapExtractNodeValue(pKe),HashmapExtractNodeValue(pVe));
		/* Point to the next entry */
		pKe = pKe->pPrev; /* Reverse link */
		pVe = pVe->pPrev;
	}
	/* Return the filled array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_reverse(array $array [,bool $preserve_keys = false ])
 *  Return an array with elements in reverse order.
 * Parameters
 *  $array
 *   The input array.
 *  $preserve_keys (optional)
 *   If set to TRUE keys are preserved.
 * Return
 *  The reversed array.
 */
static int ph7_hashmap_reverse(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc;
	ph7_value *pArray;
	int bPreserve;
	sxu32 n;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	bPreserve = FALSE;
	if( nArg > 1 && ph7_value_is_bool(apArg[1]) ){
		bPreserve = ph7_value_to_bool(apArg[1]);
	}
	/* Point to the internal representation of the input hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pEntry = pSrc->pLast;
	for( n = 0 ; n < pSrc->nEntry ; n++ ){
		HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,bPreserve);
		/* Point to the previous entry */
		pEntry = pEntry->pNext; /* Reverse link */
	}
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_unique(array $array[,int $sort_flags = SORT_STRING ])
 *  Removes duplicate values from an array
 * Parameter
 *  $array
 *   The input array.
 *  $sort_flags
 *    The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
 *    Sorting type flags:
 *       SORT_REGULAR - compare items normally (don't change types)
 *       SORT_NUMERIC - compare items numerically
 *       SORT_STRING - compare items as strings
 *       SORT_LOCALE_STRING - compare items as
 * Return 
 *  Filtered array or NULL on failure.
 */
static int ph7_hashmap_unique(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pNeedle;
	ph7_hashmap *pSrc;
	ph7_value *pArray;
	int bStrict;
	sxi32 rc;
	sxu32 n;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	bStrict = FALSE;
	if( nArg > 1 ){
		bStrict = ph7_value_to_int(apArg[1]) == 3 /* SORT_REGULAR */ ? 1 : 0;
	}
	/* Point to the internal representation of the input hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	pEntry = pSrc->pFirst;
	for( n = 0 ; n < pSrc->nEntry ; n++ ){
		pNeedle = HashmapExtractNodeValue(pEntry);
		rc = SXERR_NOTFOUND;
		if( pNeedle ){
			rc = HashmapFindValue((ph7_hashmap *)pArray->x.pOther,pNeedle,0,bStrict);
		}
		if( rc != SXRET_OK ){
			/* Perform the insertion */
			HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_flip(array $input)
 *  Exchanges all keys with their associated values in an array.
 * Parameter
 *  $input
 *   Input array.
 * Return
 *   The flipped array on success or NULL on failure.
 */
static int ph7_hashmap_flip(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pSrc;
	ph7_value *pArray;
	ph7_value *pKey;
	ph7_value sVal;
	sxu32 n;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pSrc = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Start processing */
	pEntry = pSrc->pFirst;
	for( n = 0 ; n < pSrc->nEntry ; n++ ){
		/* Extract the node value */
		pKey = HashmapExtractNodeValue(pEntry);
		if( pKey && (pKey->iFlags & MEMOBJ_NULL) == 0){
			/* Prepare the value for insertion */
			if( pEntry->iType == HASHMAP_INT_NODE ){
				PH7_MemObjInitFromInt(pSrc->pVm,&sVal,pEntry->xKey.iKey);
			}else{
				SyString sStr;
				SyStringInitFromBuf(&sStr,SyBlobData(&pEntry->xKey.sKey),SyBlobLength(&pEntry->xKey.sKey));
				PH7_MemObjInitFromString(pSrc->pVm,&sVal,&sStr);
			}
			/* Perform the insertion */
			ph7_array_add_elem(pArray,pKey,&sVal);
			/* Safely release the value because each inserted entry 
			 * have it's own private copy of the value.
			 */
			PH7_MemObjRelease(&sVal);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * number array_sum(array $array )
 *  Calculate the sum of values in an array.
 * Parameters
 *  $array: The input array.
 * Return
 *  Returns the sum of values as an integer or float.
 */
static void DoubleSum(ph7_context *pCtx,ph7_hashmap *pMap)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pObj;
	double dSum = 0;
	sxu32 n;
	pEntry = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		pObj = HashmapExtractNodeValue(pEntry);
		if( pObj && (pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES)) == 0){
			if( pObj->iFlags & MEMOBJ_REAL ){
				dSum += pObj->rVal;
			}else if( pObj->iFlags & (MEMOBJ_INT|MEMOBJ_BOOL) ){
				dSum += (double)pObj->x.iVal;
			}else if( pObj->iFlags & MEMOBJ_STRING ){
				if( SyBlobLength(&pObj->sBlob) > 0 ){
					double dv = 0;
					SyStrToReal((const char *)SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob),(void *)&dv,0);
					dSum += dv;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return sum */
	ph7_result_double(pCtx,dSum);
}
static void Int64Sum(ph7_context *pCtx,ph7_hashmap *pMap)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pObj;
	sxi64 nSum = 0;
	sxu32 n;
	pEntry = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		pObj = HashmapExtractNodeValue(pEntry);
		if( pObj && (pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES)) == 0){
			if( pObj->iFlags & MEMOBJ_REAL ){
				nSum += (sxi64)pObj->rVal;
			}else if( pObj->iFlags & (MEMOBJ_INT|MEMOBJ_BOOL) ){
				nSum += pObj->x.iVal;
			}else if( pObj->iFlags & MEMOBJ_STRING ){
				if( SyBlobLength(&pObj->sBlob) > 0 ){
					sxi64 nv = 0;
					SyStrToInt64((const char *)SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob),(void *)&nv,0);
					nSum += nv;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return sum */
	ph7_result_int64(pCtx,nSum);
}
/* number array_sum(array $array ) 
 * (See block-coment above)
 */
static int ph7_hashmap_sum(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	ph7_value *pObj;
	if( nArg < 1 ){
		/* Missing arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry < 1 ){
		/* Nothing to compute,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* If the first element is of type float,then perform floating
	 * point computaion.Otherwise switch to int64 computaion.
	 */
	pObj = HashmapExtractNodeValue(pMap->pFirst);
	if( pObj == 0 ){
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	if( pObj->iFlags & MEMOBJ_REAL ){
		DoubleSum(pCtx,pMap);
	}else{
		Int64Sum(pCtx,pMap);
	}
	return PH7_OK;
}
/*
 * number array_product(array $array )
 *  Calculate the product of values in an array.
 * Parameters
 *  $array: The input array.
 * Return
 *  Returns the product of values as an integer or float.
 */
static void DoubleProd(ph7_context *pCtx,ph7_hashmap *pMap)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pObj;
	double dProd;
	sxu32 n;
	pEntry = pMap->pFirst;
	dProd = 1;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		pObj = HashmapExtractNodeValue(pEntry);
		if( pObj && (pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES)) == 0){
			if( pObj->iFlags & MEMOBJ_REAL ){
				dProd *= pObj->rVal;
			}else if( pObj->iFlags & (MEMOBJ_INT|MEMOBJ_BOOL) ){
				dProd *= (double)pObj->x.iVal;
			}else if( pObj->iFlags & MEMOBJ_STRING ){
				if( SyBlobLength(&pObj->sBlob) > 0 ){
					double dv = 0;
					SyStrToReal((const char *)SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob),(void *)&dv,0);
					dProd *= dv;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return product */
	ph7_result_double(pCtx,dProd);
}
static void Int64Prod(ph7_context *pCtx,ph7_hashmap *pMap)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pObj;
	sxi64 nProd;
	sxu32 n;
	pEntry = pMap->pFirst;
	nProd = 1;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		pObj = HashmapExtractNodeValue(pEntry);
		if( pObj && (pObj->iFlags & (MEMOBJ_NULL|MEMOBJ_HASHMAP|MEMOBJ_OBJ|MEMOBJ_RES)) == 0){
			if( pObj->iFlags & MEMOBJ_REAL ){
				nProd *= (sxi64)pObj->rVal;
			}else if( pObj->iFlags & (MEMOBJ_INT|MEMOBJ_BOOL) ){
				nProd *= pObj->x.iVal;
			}else if( pObj->iFlags & MEMOBJ_STRING ){
				if( SyBlobLength(&pObj->sBlob) > 0 ){
					sxi64 nv = 0;
					SyStrToInt64((const char *)SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob),(void *)&nv,0);
					nProd *= nv;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* Return product */
	ph7_result_int64(pCtx,nProd);
}
/* number array_product(array $array )
 * (See block-block comment above)
 */
static int ph7_hashmap_product(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	ph7_value *pObj;
	if( nArg < 1 ){
		/* Missing arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( !ph7_value_is_array(apArg[0]) ){
		/* Invalid argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if( pMap->nEntry < 1 ){
		/* Nothing to compute,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* If the first element is of type float,then perform floating
	 * point computaion.Otherwise switch to int64 computaion.
	 */
	pObj = HashmapExtractNodeValue(pMap->pFirst);
	if( pObj == 0 ){
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	if( pObj->iFlags & MEMOBJ_REAL ){
		DoubleProd(pCtx,pMap);
	}else{
		Int64Prod(pCtx,pMap);
	}
	return PH7_OK;
}
/*
 * value array_rand(array $input[,int $num_req = 1 ])
 *  Pick one or more random entries out of an array.
 * Parameters
 * $input
 *  The input array.
 * $num_req
 *  Specifies how many entries you want to pick.
 * Return
 *  If you are picking only one entry, array_rand() returns the key for a random entry.
 *  Otherwise, it returns an array of keys for the random entries.
 *  NULL is returned on failure.
 */
static int ph7_hashmap_rand(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pNode;
	ph7_hashmap *pMap;
	int nItem = 1;
	if( nArg < 1 ){
		/* Missing argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make sure we are dealing with an array */
	if( !ph7_value_is_array(apArg[0]) ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	if(pMap->nEntry < 1 ){
		/* Empty hashmap,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg > 1 ){
		nItem = ph7_value_to_int(apArg[1]);
	}
	if( nItem < 2 ){
		sxu32 nEntry;
		/* Select a random number */
		nEntry = PH7_VmRandomNum(pMap->pVm) % pMap->nEntry;
		/* Extract the desired entry.
		 * Note that we perform a linear lookup here (later version must change this)
		 */
		if( nEntry > pMap->nEntry / 2 ){
			pNode = pMap->pLast;
			nEntry = pMap->nEntry - nEntry;
			if( nEntry > 1 ){
				for(;;){
					if( nEntry == 0 ){
						break;
					}
					/* Point to the previous entry */
					pNode = pNode->pNext; /* Reverse link */
					nEntry--;
				}
			}
		}else{
			pNode = pMap->pFirst;
			for(;;){
				if( nEntry == 0 ){
					break;
				}
				/* Point to the next entry */
				pNode = pNode->pPrev; /* Reverse link */
				nEntry--;
			}
		}
		if( pNode->iType == HASHMAP_INT_NODE ){
			/* Int key */
			ph7_result_int64(pCtx,pNode->xKey.iKey);
		}else{
			/* Blob key */
			ph7_result_string(pCtx,(const char *)SyBlobData(&pNode->xKey.sKey),(int)SyBlobLength(&pNode->xKey.sKey));
		}
	}else{
		ph7_value sKey,*pArray;
		ph7_hashmap *pDest;
		/* Create a new array */
		pArray = ph7_context_new_array(pCtx);
		if( pArray == 0 ){
			ph7_result_null(pCtx);
			return PH7_OK;
		}
		/* Point to the internal representation of the hashmap */
		pDest = (ph7_hashmap *)pArray->x.pOther;
		PH7_MemObjInit(pDest->pVm,&sKey);
		/* Copy the first n items */
		pNode = pMap->pFirst;
		if( nItem > (int)pMap->nEntry ){
			nItem = (int)pMap->nEntry;
		}
		while( nItem > 0){
			PH7_HashmapExtractNodeKey(pNode,&sKey);
			PH7_HashmapInsert(pDest,0/* Automatic index assign*/,&sKey);
			PH7_MemObjRelease(&sKey);
			/* Point to the next entry */
			pNode = pNode->pPrev; /* Reverse link */
			nItem--;
		}
		/* Shuffle the array */
		HashmapMergeSort(pDest,HashmapCmpCallback7,0);
		/* Rehash node */
		HashmapSortRehash(pDest);
		/* Return the random array */
		ph7_result_value(pCtx,pArray);
	}
	return PH7_OK;
}
/*
 * array array_chunk (array $input,int $size [,bool $preserve_keys = false ])
 *  Split an array into chunks.
 * Parameters
 * $input
 *   The array to work on
 * $size
 *   The size of each chunk
 * $preserve_keys
 *   When set to TRUE keys will be preserved. Default is FALSE which will reindex
 *   the chunk numerically.
 * Return
 *  Returns a multidimensional numerically indexed array, starting with 
 *  zero, with each dimension containing size elements. 
 */
static int ph7_hashmap_chunk(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pChunk;
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pMap;
	int bPreserve;
	sxu32 nChunk;
	sxu32 nSize;
	sxu32 n;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Extract the chunk size */
	nSize = (sxu32)ph7_value_to_int(apArg[1]);
	if( nSize < 1 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nSize >= pMap->nEntry ){
		/* Return the whole array */
		ph7_array_add_elem(pArray,0,apArg[0]);
		ph7_result_value(pCtx,pArray);
		return PH7_OK;
	}
	bPreserve = 0;
	if( nArg > 2 ){
		bPreserve = ph7_value_to_bool(apArg[2]);
	}
	/* Start processing */
	pEntry = pMap->pFirst;
	nChunk = 0;
	pChunk = 0;
	n = pMap->nEntry;
	for( ;; ){
		if( n < 1 ){
			if( nChunk > 0 ){
				/* Insert the last chunk */
				ph7_array_add_elem(pArray,0,pChunk); /* Will have it's own copy */
			}
			break;
		}
		if( nChunk < 1 ){
			if( pChunk ){
				/* Put the first chunk */
				ph7_array_add_elem(pArray,0,pChunk); /* Will have it's own copy */
			}
			/* Create a new dimension */
			pChunk = ph7_context_new_array(pCtx); /* Don't worry about freeing memory here,everything
												   * will be automatically released as soon we return
												   * from this function */
			if( pChunk == 0 ){
				break;
			}
			nChunk = nSize;
		}
		/* Insert the entry */
		HashmapInsertNode((ph7_hashmap *)pChunk->x.pOther,pEntry,bPreserve);
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		nChunk--;
		n--;
	}
	/* Return the multidimensional array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_pad(array $input,int $pad_size,value $pad_value)
 *  Pad array to the specified length with a value.
 * $input
 *   Initial array of values to pad.
 * $pad_size
 *   New size of the array.
 * $pad_value
 *   Value to pad if input is less than pad_size.
 */
static int ph7_hashmap_pad(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	ph7_value *pArray;
	int nEntry;
	if( nArg < 3 || !ph7_value_is_array(apArg[0]) ){
		/* Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Extract the total number of desired entry to insert */
	nEntry = ph7_value_to_int(apArg[1]);
	if( nEntry < 0 ){
		nEntry = -nEntry;
		if( nEntry > 1048576 ){
			nEntry = 1048576; /* Limit imposed by PHP */
		}
		if( nEntry > (int)pMap->nEntry ){
			nEntry -= (int)pMap->nEntry;
			/* Insert given items first */
			while( nEntry > 0 ){
				ph7_array_add_elem(pArray,0,apArg[2]);
				nEntry--;
			}
			/* Merge the two arrays */
			HashmapMerge(pMap,(ph7_hashmap *)pArray->x.pOther);
		}else{
			PH7_HashmapDup(pMap,(ph7_hashmap *)pArray->x.pOther);
		}
	}else if( nEntry > 0 ){
		if( nEntry > 1048576 ){
			nEntry = 1048576; /* Limit imposed by PHP */
		}
		if( nEntry > (int)pMap->nEntry ){
			nEntry -= (int)pMap->nEntry;
			/* Merge the two arrays first */
			HashmapMerge(pMap,(ph7_hashmap *)pArray->x.pOther);
			/* Insert given items */
			while( nEntry > 0 ){
				ph7_array_add_elem(pArray,0,apArg[2]);
				nEntry--;
			}
		}else{
			PH7_HashmapDup(pMap,(ph7_hashmap *)pArray->x.pOther);
		}
	}
	/* Return the new array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_replace(array &$array,array &$array1,...)
 *  Replaces elements from passed arrays into the first array.
 * Parameters
 * $array
 *   The array in which elements are replaced.
 * $array1
 *   The array from which elements will be extracted.
 * ....
 *  More arrays from which elements will be extracted.
 *  Values from later arrays overwrite the previous values.
 * Return
 *  Returns an array, or NULL if an error occurs.
 */
static int ph7_hashmap_replace(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	ph7_value *pArray;
	int i;
	if( nArg < 1 ){
		/* Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for( i = 0 ; i < nArg ; i++ ){
		if( !ph7_value_is_array(apArg[i]) ){
			continue;
		}
		/* Point to the internal representation of the input hashmap */
		pMap = (ph7_hashmap *)apArg[i]->x.pOther;
		HashmapOverwrite(pMap,(ph7_hashmap *)pArray->x.pOther);
	}
	/* Return the new array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_filter(array $input [,callback $callback ])
 *  Filters elements of an array using a callback function.
 * Parameters
 *  $input
 *    The array to iterate over
 * $callback
 *    The callback function to use
 *    If no callback is supplied, all entries of input equal to FALSE (see converting to boolean)
 *    will be removed.
 * Return
 *  The filtered array.
 */
static int ph7_hashmap_filter(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pMap;
	ph7_value *pArray;
	ph7_value sResult;   /* Callback result */
	ph7_value *pValue;
	sxi32 rc;
	int keep;
	sxu32 n;
	if( nArg < 1 || !ph7_value_is_array(apArg[0]) ){
		/* Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	pEntry = pMap->pFirst;
	PH7_MemObjInit(pMap->pVm,&sResult);
	sResult.nIdx = SXU32_HIGH; /* Mark as constant */
	/* Perform the requested operation */
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extract node value */
		pValue = HashmapExtractNodeValue(pEntry);
		if( nArg > 1 && pValue ){
			/* Invoke the given callback */
			keep = FALSE;
			rc = PH7_VmCallUserFunction(pMap->pVm,apArg[1],1,&pValue,&sResult);
			if( rc == SXRET_OK ){
				/* Perform a boolean cast */
				keep = ph7_value_to_bool(&sResult);
			}
			PH7_MemObjRelease(&sResult);
		}else{
			/* No available callback,check for empty item */
			keep = !PH7_MemObjIsEmpty(pValue);
		}
		if( keep ){
			/* Perform the insertion,now the callback returned true */
			HashmapInsertNode((ph7_hashmap *)pArray->x.pOther,pEntry,TRUE);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * array array_map(callback $callback,array $arr1)
 *  Applies the callback to the elements of the given arrays.
 * Parameters
 *  $callback
 *   Callback function to run for each element in each array.
 * $arr1
 *   An array to run through the callback function.
 * Return
 *  Returns an array containing all the elements of arr1 after applying
 *  the callback function to each one. 
 * NOTE:
 *  array_map() passes only a single value to the callback. 
 */
static int ph7_hashmap_map(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pValue,sKey,sResult;
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pMap;
	sxu32 n;
	if( nArg < 2 || !ph7_value_is_array(apArg[1]) ){
		/* Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[1]->x.pOther;
	PH7_MemObjInit(pMap->pVm,&sResult);
	PH7_MemObjInit(pMap->pVm,&sKey);
	sResult.nIdx = SXU32_HIGH; /* Mark as constant */
	sKey.nIdx    = SXU32_HIGH; /* Mark as constant */
	/* Perform the requested operation */
	pEntry = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extrcat the node value */
		pValue = HashmapExtractNodeValue(pEntry);
		if( pValue ){
			sxi32 rc;
			/* Invoke the supplied callback */
			rc = PH7_VmCallUserFunction(pMap->pVm,apArg[0],1,&pValue,&sResult);
			/* Extract the node key */
			PH7_HashmapExtractNodeKey(pEntry,&sKey);
			if( rc != SXRET_OK ){
				/* An error occured while invoking the supplied callback [i.e: not defined] */
				ph7_array_add_elem(pArray,&sKey,pValue); /* Keep the same value */
			}else{
				/* Insert the callback return value */
				ph7_array_add_elem(pArray,&sKey,&sResult);
			}
			PH7_MemObjRelease(&sKey);
			PH7_MemObjRelease(&sResult);
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * value array_reduce(array $input,callback $function[, value $initial = NULL ])
 *  Iteratively reduce the array to a single value using a callback function.
 * Parameters
 *  $input
 *   The input array.
 *  $function
 *  The callback function.
 * $initial
 *  If the optional initial is available, it will be used at the beginning 
 *  of the process, or as a final result in case the array is empty.
 * Return
 *  Returns the resulting value. 
 *  If the array is empty and initial is not passed, array_reduce() returns NULL. 
 */
static int ph7_hashmap_reduce(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pMap;
	ph7_value *pValue;
	ph7_value sResult;
	sxu32 n;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Invalid/Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Assume a NULL initial value */
	PH7_MemObjInit(pMap->pVm,&sResult);
	sResult.nIdx = SXU32_HIGH; /* Mark as constant */
	if( nArg > 2 ){
		/* Set the initial value */
		PH7_MemObjLoad(apArg[2],&sResult);
	}
	/* Perform the requested operation */
	pEntry = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extract the node value */
		pValue = HashmapExtractNodeValue(pEntry);
		/* Invoke the supplied callback */
		PH7_VmCallUserFunctionAp(pMap->pVm,apArg[1],&sResult,&sResult,pValue,0);
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	ph7_result_value(pCtx,&sResult); /* Will make it's own copy */
	PH7_MemObjRelease(&sResult);
	return PH7_OK;
}
/*
 * bool array_walk(array &$array,callback $funcname [, value $userdata ] )
 *  Apply a user function to every member of an array.
 * Parameters
 *  $array
 *   The input array.
 * $funcname
 *  Typically, funcname takes on two parameters.The array parameter's value being
 *  the first, and the key/index second.
 * Note:
 *  If funcname needs to be working with the actual values of the array,specify the first
 *  parameter of funcname as a reference. Then, any changes made to those elements will 
 *  be made in the original array itself.
 * $userdata
 *  If the optional userdata parameter is supplied, it will be passed as the third parameter
 *  to the callback funcname.
 * Return
 *  Returns TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_walk(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pValue,*pUserData,sKey;
	ph7_hashmap_node *pEntry;
	ph7_hashmap *pMap;
	sxi32 rc;
	sxu32 n;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Invalid/Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	pUserData = nArg > 2 ? apArg[2] : 0;
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	PH7_MemObjInit(pMap->pVm,&sKey);
	sKey.nIdx = SXU32_HIGH; /* Mark as constant */
	/* Perform the desired operation */
	pEntry = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extract the node value */
		pValue = HashmapExtractNodeValue(pEntry);
		if( pValue ){
			/* Extract the entry key */
			PH7_HashmapExtractNodeKey(pEntry,&sKey);
			/* Invoke the supplied callback */
			rc = PH7_VmCallUserFunctionAp(pMap->pVm,apArg[1],0,pValue,&sKey,pUserData,0);
			PH7_MemObjRelease(&sKey);
			if( rc != SXRET_OK ){
				/* An error occured while invoking the supplied callback [i.e: not defined] */
				ph7_result_bool(pCtx,0); /* return FALSE */
				return PH7_OK;
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	/* All done,return TRUE */
	ph7_result_bool(pCtx,1);
	return PH7_OK;
}
/*
 * Apply a user function to every member of an array.(Recurse on array's). 
 * Refer to the [array_walk_recursive()] implementation for more information.
 */
static int HashmapWalkRecursive(
	ph7_hashmap *pMap,    /* Target hashmap */
	ph7_value *pCallback, /* User callback */
	ph7_value *pUserData, /* Callback private data */
	int iNest             /* Nesting level */
	)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pValue,sKey;
	sxi32 rc;
	sxu32 n;
	/* Iterate throw hashmap entries */
	PH7_MemObjInit(pMap->pVm,&sKey);
	sKey.nIdx = SXU32_HIGH; /* Mark as constant */
	pEntry = pMap->pFirst;
	for( n = 0 ; n < pMap->nEntry ; n++ ){
		/* Extract the node value */
		pValue = HashmapExtractNodeValue(pEntry);
		if( pValue ){
			if( pValue->iFlags & MEMOBJ_HASHMAP ){
				if( iNest < 32 ){
					/* Recurse */
					iNest++;
					HashmapWalkRecursive((ph7_hashmap *)pValue->x.pOther,pCallback,pUserData,iNest);
					iNest--;
				}
			}else{
				/* Extract the node key */
				PH7_HashmapExtractNodeKey(pEntry,&sKey);
				/* Invoke the supplied callback */
				rc = PH7_VmCallUserFunctionAp(pMap->pVm,pCallback,0,pValue,&sKey,pUserData,0);
				PH7_MemObjRelease(&sKey);
				if( rc != SXRET_OK ){
					return rc;
				}
			}
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	return SXRET_OK;
}
/*
 * bool array_walk_recursive(array &$array,callback $funcname [, value $userdata ] )
 *  Apply a user function recursively to every member of an array.
 * Parameters
 *  $array
 *   The input array.
 * $funcname
 *  Typically, funcname takes on two parameters.The array parameter's value being
 *  the first, and the key/index second.
 * Note:
 *  If funcname needs to be working with the actual values of the array,specify the first
 *  parameter of funcname as a reference. Then, any changes made to those elements will 
 *  be made in the original array itself.
 * $userdata
 *  If the optional userdata parameter is supplied, it will be passed as the third parameter
 *  to the callback funcname.
 * Return
 *  Returns TRUE on success or FALSE on failure.
 */
static int ph7_hashmap_walk_recursive(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_hashmap *pMap;
	sxi32 rc;
	if( nArg < 2 || !ph7_value_is_array(apArg[0]) ){
		/* Invalid/Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the internal representation of the input hashmap */
	pMap = (ph7_hashmap *)apArg[0]->x.pOther;
	/* Perform the desired operation */
	rc = HashmapWalkRecursive(pMap,apArg[1],nArg > 2 ? apArg[2] : 0,0);
	/* All done */
	ph7_result_bool(pCtx,rc == SXRET_OK);
	return PH7_OK;
}
/*
 * Table of hashmap functions.
 */
static const ph7_builtin_func aHashmapFunc[] = {
	{"count",             ph7_hashmap_count },
	{"sizeof",            ph7_hashmap_count },
	{"array_key_exists",  ph7_hashmap_key_exists },
	{"array_pop",         ph7_hashmap_pop     },
	{"array_push",        ph7_hashmap_push    },
	{"array_shift",       ph7_hashmap_shift   },
	{"array_product",     ph7_hashmap_product },
	{"array_sum",         ph7_hashmap_sum     },
	{"array_keys",        ph7_hashmap_keys    },
	{"array_values",      ph7_hashmap_values  },
	{"array_same",        ph7_hashmap_same    },  /* Symisc eXtension */
	{"array_merge",       ph7_hashmap_merge   },
	{"array_slice",       ph7_hashmap_slice   },
	{"array_splice",      ph7_hashmap_splice  },
	{"array_search",      ph7_hashmap_search  },
	{"array_diff",        ph7_hashmap_diff    },
	{"array_udiff",       ph7_hashmap_udiff   },
	{"array_diff_assoc",  ph7_hashmap_diff_assoc },
	{"array_diff_uassoc", ph7_hashmap_diff_uassoc },
	{"array_diff_key",    ph7_hashmap_diff_key },
	{"array_intersect",   ph7_hashmap_intersect},
	{"array_intersect_assoc", ph7_hashmap_intersect_assoc},
	{"array_uintersect",  ph7_hashmap_uintersect},
	{"array_intersect_key",   ph7_hashmap_intersect_key},
	{"array_copy",        ph7_hashmap_copy    },
	{"array_erase",       ph7_hashmap_erase   },
	{"array_fill",        ph7_hashmap_fill    },
	{"array_fill_keys",   ph7_hashmap_fill_keys},
	{"array_combine",     ph7_hashmap_combine },
	{"array_reverse",     ph7_hashmap_reverse },
	{"array_unique",      ph7_hashmap_unique  },
	{"array_flip",        ph7_hashmap_flip    },
	{"array_rand",        ph7_hashmap_rand    },
	{"array_chunk",       ph7_hashmap_chunk   },
	{"array_pad",         ph7_hashmap_pad     },
	{"array_replace",     ph7_hashmap_replace },
	{"array_filter",      ph7_hashmap_filter  },
	{"array_map",         ph7_hashmap_map     },
	{"array_reduce",      ph7_hashmap_reduce  },
	{"array_walk",        ph7_hashmap_walk    },
	{"array_walk_recursive", ph7_hashmap_walk_recursive },
	{"in_array",          ph7_hashmap_in_array},
	{"sort",              ph7_hashmap_sort    },
	{"asort",             ph7_hashmap_asort   },
	{"arsort",            ph7_hashmap_arsort  },
	{"ksort",             ph7_hashmap_ksort   },
	{"krsort",            ph7_hashmap_krsort  },
	{"rsort",             ph7_hashmap_rsort   },
	{"usort",             ph7_hashmap_usort   },
	{"uasort",            ph7_hashmap_uasort  },
	{"uksort",            ph7_hashmap_uksort  },
	{"shuffle",           ph7_hashmap_shuffle },
	{"range",             ph7_hashmap_range   },
	{"current",           ph7_hashmap_current },
	{"each",              ph7_hashmap_each    },
	{"pos",               ph7_hashmap_current },
	{"next",              ph7_hashmap_next    },
	{"prev",              ph7_hashmap_prev    },
	{"end",               ph7_hashmap_end     },
	{"reset",             ph7_hashmap_reset   },
	{"key",               ph7_hashmap_simple_key }
};
/*
 * Register the built-in hashmap functions defined above.
 */
PH7_PRIVATE void PH7_RegisterHashmapFunctions(ph7_vm *pVm)
{
	sxu32 n;
	for( n = 0 ; n < SX_ARRAYSIZE(aHashmapFunc) ; n++ ){
		ph7_create_function(&(*pVm),aHashmapFunc[n].zName,aHashmapFunc[n].xFunc,0);
	}
}
/*
 * Dump a hashmap instance and it's entries and the store the dump in
 * the BLOB given as the first argument.
 * This function is typically invoked when the user issue a call to 
 * [var_dump(),var_export(),print_r(),...]
 * This function SXRET_OK on success. Any other return value including 
 * SXERR_LIMIT(infinite recursion) indicates failure.
 */
PH7_PRIVATE sxi32 PH7_HashmapDump(SyBlob *pOut,ph7_hashmap *pMap,int ShowType,int nTab,int nDepth)
{
	ph7_hashmap_node *pEntry;
	ph7_value *pObj;
	sxu32 n = 0;
	int isRef;
	sxi32 rc;
	int i;
	if( nDepth > 31 ){
		static const char zInfinite[] = "Nesting limit reached: Infinite recursion?";
		/* Nesting limit reached */
		SyBlobAppend(&(*pOut),zInfinite,sizeof(zInfinite)-1);
		if( ShowType ){
			SyBlobAppend(&(*pOut),")",sizeof(char));
		}
		return SXERR_LIMIT;
	}
	/* Point to the first inserted entry */
	pEntry = pMap->pFirst;
	rc = SXRET_OK;
	if( !ShowType ){
		SyBlobAppend(&(*pOut),"Array(",sizeof("Array(")-1);
	}
	/* Total entries */
	SyBlobFormat(&(*pOut),"%u) {",pMap->nEntry);
#ifdef __WINNT__
	SyBlobAppend(&(*pOut),"\r\n",sizeof("\r\n")-1);
#else
	SyBlobAppend(&(*pOut),"\n",sizeof(char));
#endif
	for(;;){
		if( n >= pMap->nEntry ){
			break;
		}
		for( i = 0 ; i < nTab ; i++ ){
			SyBlobAppend(&(*pOut)," ",sizeof(char));
		}
		/* Dump key */
		if( pEntry->iType == HASHMAP_INT_NODE){
			SyBlobFormat(&(*pOut),"[%qd] =>",pEntry->xKey.iKey);
		}else{
			SyBlobFormat(&(*pOut),"[%.*s] =>",
				SyBlobLength(&pEntry->xKey.sKey),SyBlobData(&pEntry->xKey.sKey));
		}
#ifdef __WINNT__
		SyBlobAppend(&(*pOut),"\r\n",sizeof("\r\n")-1);
#else
		SyBlobAppend(&(*pOut),"\n",sizeof(char));
#endif		
		/* Dump node value */
		pObj = HashmapExtractNodeValue(pEntry);
		isRef = 0;
		if( pObj ){
			if( pEntry->iFlags & HASHMAP_NODE_FOREIGN_OBJ ){
				/* Referenced object */
				isRef = 1;
			}
			rc = PH7_MemObjDump(&(*pOut),pObj,ShowType,nTab+1,nDepth,isRef);
			if( rc == SXERR_LIMIT ){
				break;
			}
		}
		/* Point to the next entry */
		n++;
		pEntry = pEntry->pPrev; /* Reverse link */
	}
	for( i = 0 ; i < nTab ; i++ ){
		SyBlobAppend(&(*pOut)," ",sizeof(char));
	}
	SyBlobAppend(&(*pOut),"}",sizeof(char));
	return rc;
}
/*
 * Iterate throw hashmap entries and invoke the given callback [i.e: xWalk()] for each 
 * retrieved entry.
 * Note that argument are passed to the callback by copy. That is,any modification to 
 * the entry value in the callback body will not alter the real value.
 * If the callback wishes to abort processing [i.e: it's invocation] it must return
 * a value different from PH7_OK.
 * Refer to [ph7_array_walk()] for more information.
 */
PH7_PRIVATE sxi32 PH7_HashmapWalk(
	ph7_hashmap *pMap, /* Target hashmap */
	int (*xWalk)(ph7_value *,ph7_value *,void *), /* Walker callback */
	void *pUserData /* Last argument to xWalk() */
	)
{
	ph7_hashmap_node *pEntry;
	ph7_value sKey,sValue;
	sxi32 rc;
	sxu32 n;
	/* Initialize walker parameter */
	rc = SXRET_OK;
	PH7_MemObjInit(pMap->pVm,&sKey);
	PH7_MemObjInit(pMap->pVm,&sValue);
	n = pMap->nEntry;
	pEntry = pMap->pFirst;
	/* Start the iteration process */
	for(;;){
		if( n < 1 ){
			break;
		}
		/* Extract a copy of the key and a copy the current value */
		PH7_HashmapExtractNodeKey(pEntry,&sKey);
		PH7_HashmapExtractNodeValue(pEntry,&sValue,FALSE);
		/* Invoke the user callback */
		rc = xWalk(&sKey,&sValue,pUserData);
		/* Release the copy of the key and the value */
		PH7_MemObjRelease(&sKey);
		PH7_MemObjRelease(&sValue);
		if( rc != PH7_OK ){
			/* Callback request an operation abort */
			return SXERR_ABORT;
		}
		/* Point to the next entry */
		pEntry = pEntry->pPrev; /* Reverse link */
		n--;
	}
	/* All done */
	return SXRET_OK;
}
/*
 * ----------------------------------------------------------
 * File: constant.c
 * MD5: 9cf62714d3cc5de3825c4eebc8378bb7
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: constant.c v1.1 Win7 2012-08-07 08:22 devel <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/* This file implement built-in constants for the PH7 engine. */
/*
 * PH7_VERSION
 * __PH7__
 *   Expand the current version of the PH7 engine.
 */
static void PH7_VER_Const(ph7_value *pVal,void *pUnused)
{
	SXUNUSED(pUnused);
	ph7_value_string(pVal,ph7_lib_signature(),-1/*Compute length automatically*/);
}
#ifdef __WINNT__
#include <Windows.h>
#elif defined(__UNIXES__)
#include <sys/utsname.h>
#endif
/*
 * PHP_OS
 *  Expand the name of the host Operating System.
 */
static void PH7_OS_Const(ph7_value *pVal,void *pUnused)
{
#if defined(__WINNT__)
	ph7_value_string(pVal,"WINNT",(int)sizeof("WINNT")-1);
#elif defined(__UNIXES__)
	struct utsname sInfo;
	if( uname(&sInfo) != 0 ){
		ph7_value_string(pVal,"Unix",(int)sizeof("Unix")-1);
	}else{
		ph7_value_string(pVal,sInfo.sysname,-1);
	}
#else
	ph7_value_string(pVal,"Host OS",(int)sizeof("Host OS")-1);
#endif
	SXUNUSED(pUnused);
}
/*
 * PHP_EOL
 *  Expand the correct 'End Of Line' symbol for this platform.
 */
static void PH7_EOL_Const(ph7_value *pVal,void *pUnused)
{
	SXUNUSED(pUnused);
#ifdef __WINNT__
	ph7_value_string(pVal,"\r\n",(int)sizeof("\r\n")-1);
#else
	ph7_value_string(pVal,"\n",(int)sizeof(char));
#endif
}
/*
 * PHP_INT_MAX
 * Expand the largest integer supported.
 * Note that PH7 deals with 64-bit integer for all platforms.
 */
static void PH7_INTMAX_Const(ph7_value *pVal,void *pUnused)
{
	SXUNUSED(pUnused);
	ph7_value_int64(pVal,SXI64_HIGH);
}
/*
 * PHP_INT_SIZE
 * Expand the size in bytes of a 64-bit integer.
 */
static void PH7_INTSIZE_Const(ph7_value *pVal,void *pUnused)
{
	SXUNUSED(pUnused);
	ph7_value_int64(pVal,sizeof(sxi64));
}
/*
 * DIRECTORY_SEPARATOR.
 * Expand the directory separator character.
 */
static void PH7_DIRSEP_Const(ph7_value *pVal,void *pUnused)
{
	SXUNUSED(pUnused);
#ifdef __WINNT__
	ph7_value_string(pVal,"\\",(int)sizeof(char));
#else
	ph7_value_string(pVal,"/",(int)sizeof(char));
#endif
}
/*
 * PATH_SEPARATOR.
 * Expand the path separator character.
 */
static void PH7_PATHSEP_Const(ph7_value *pVal,void *pUnused)
{
	SXUNUSED(pUnused);
#ifdef __WINNT__
	ph7_value_string(pVal,";",(int)sizeof(char));
#else
	ph7_value_string(pVal,":",(int)sizeof(char));
#endif
}
#ifndef __WINNT__
#include <time.h>
#endif
/*
 * __TIME__
 *  Expand the current time (GMT).
 */
static void PH7_TIME_Const(ph7_value *pVal,void *pUnused)
{
	Sytm sTm;
#ifdef __WINNT__
	SYSTEMTIME sOS;
	GetSystemTime(&sOS);
	SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
	struct tm *pTm;
	time_t t;
	time(&t);
	pTm = gmtime(&t);
	STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	SXUNUSED(pUnused); /* cc warning */
	/* Expand */
	ph7_value_string_format(pVal,"%02d:%02d:%02d",sTm.tm_hour,sTm.tm_min,sTm.tm_sec);
}
/*
 * __DATE__
 *  Expand the current date in the ISO-8601 format.
 */
static void PH7_DATE_Const(ph7_value *pVal,void *pUnused)
{
	Sytm sTm;
#ifdef __WINNT__
	SYSTEMTIME sOS;
	GetSystemTime(&sOS);
	SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
	struct tm *pTm;
	time_t t;
	time(&t);
	pTm = gmtime(&t);
	STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	SXUNUSED(pUnused); /* cc warning */
	/* Expand */
	ph7_value_string_format(pVal,"%04d-%02d-%02d",sTm.tm_year,sTm.tm_mon+1,sTm.tm_mday);
}
/*
 * __FILE__
 *  Path of the processed script.
 */
static void PH7_FILE_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	SyString *pFile;
	/* Peek the top entry */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	if( pFile == 0 ){
		/* Expand the magic word: ":MEMORY:" */
		ph7_value_string(pVal,":MEMORY:",(int)sizeof(":MEMORY:")-1);
	}else{
		ph7_value_string(pVal,pFile->zString,pFile->nByte);
	}
}
/*
 * __DIR__
 *  Directory holding the processed script.
 */
static void PH7_DIR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	SyString *pFile;
	/* Peek the top entry */
	pFile = (SyString *)SySetPeek(&pVm->aFiles);
	if( pFile == 0 ){
		/* Expand the magic word: ":MEMORY:" */
		ph7_value_string(pVal,":MEMORY:",(int)sizeof(":MEMORY:")-1);
	}else{
		if( pFile->nByte > 0 ){
			const char *zDir;
			int nLen;
			zDir = PH7_ExtractDirName(pFile->zString,(int)pFile->nByte,&nLen);
			ph7_value_string(pVal,zDir,nLen);
		}else{
			/* Expand '.' as the current directory*/
			ph7_value_string(pVal,".",(int)sizeof(char));
		}
	}
}
/*
 * PHP_SHLIB_SUFFIX
 *  Expand shared library suffix.
 */
static void PH7_PHP_SHLIB_SUFFIX_Const(ph7_value *pVal,void *pUserData)
{
#ifdef __WINNT__
	ph7_value_string(pVal,"dll",(int)sizeof("dll")-1);
#else
	ph7_value_string(pVal,"so",(int)sizeof("so")-1);
#endif
	SXUNUSED(pUserData); /* cc warning */
}
/*
 * E_ERROR
 *  Expands 1
 */
static void PH7_E_ERROR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1);
	SXUNUSED(pUserData);
}
/*
 * E_WARNING
 *  Expands 2
 */
static void PH7_E_WARNING_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,2);
	SXUNUSED(pUserData);
}
/*
 * E_PARSE
 *  Expands 4
 */
static void PH7_E_PARSE_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,4);
	SXUNUSED(pUserData);
}
/*
 * E_NOTICE
 * Expands 8
 */
static void PH7_E_NOTICE_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,8);
	SXUNUSED(pUserData);
}
/*
 * E_CORE_ERROR
 * Expands 16
 */
static void PH7_E_CORE_ERROR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,16);
	SXUNUSED(pUserData);
}
/*
 * E_CORE_WARNING
 * Expands 32
 */
static void PH7_E_CORE_WARNING_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,32);
	SXUNUSED(pUserData);
}
/*
 * E_COMPILE_ERROR
 * Expands 64
 */
static void PH7_E_COMPILE_ERROR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,64);
	SXUNUSED(pUserData);
}
/*
 * E_COMPILE_WARNING 
 * Expands 128
 */
static void PH7_E_COMPILE_WARNING_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,128);
	SXUNUSED(pUserData);
}
/*
 * E_USER_ERROR
 * Expands 256
 */
static void PH7_E_USER_ERROR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,256);
	SXUNUSED(pUserData);
}
/*
 * E_USER_WARNING
 * Expands 512
 */
static void PH7_E_USER_WARNING_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,512);
	SXUNUSED(pUserData);
}
/*
 * E_USER_NOTICE
 * Expands 1024
 */
static void PH7_E_USER_NOTICE_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1024);
	SXUNUSED(pUserData);
}
/*
 * E_STRICT
 * Expands 2048
 */
static void PH7_E_STRICT_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,2048);
	SXUNUSED(pUserData);
}
/*
 * E_RECOVERABLE_ERROR 
 * Expands 4096
 */
static void PH7_E_RECOVERABLE_ERROR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,4096);
	SXUNUSED(pUserData);
}
/*
 * E_DEPRECATED
 * Expands 8192
 */
static void PH7_E_DEPRECATED_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,8192);
	SXUNUSED(pUserData);
}
/*
 * E_USER_DEPRECATED 
 *   Expands 16384.
 */
static void PH7_E_USER_DEPRECATED_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,16384);
	SXUNUSED(pUserData);
}
/*
 * E_ALL
 *  Expands 32767
 */
static void PH7_E_ALL_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,32767);
	SXUNUSED(pUserData);
}
/*
 * CASE_LOWER
 *  Expands 0.
 */
static void PH7_CASE_LOWER_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,0);
	SXUNUSED(pUserData);
}
/*
 * CASE_UPPER
 *  Expands 1.
 */
static void PH7_CASE_UPPER_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1);
	SXUNUSED(pUserData);
}
/*
 * STR_PAD_LEFT
 *  Expands 0.
 */
static void PH7_STR_PAD_LEFT_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,0);
	SXUNUSED(pUserData);
}
/*
 * STR_PAD_RIGHT
 *  Expands 1.
 */
static void PH7_STR_PAD_RIGHT_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1);
	SXUNUSED(pUserData);
}
/*
 * STR_PAD_BOTH
 *  Expands 2.
 */
static void PH7_STR_PAD_BOTH_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,2);
	SXUNUSED(pUserData);
}
/*
 * COUNT_NORMAL
 *  Expands 0
 */
static void PH7_COUNT_NORMAL_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,0);
	SXUNUSED(pUserData);
}
/*
 * COUNT_RECURSIVE
 *  Expands 1.
 */
static void PH7_COUNT_RECURSIVE_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1);
	SXUNUSED(pUserData);
}
/*
 * SORT_ASC
 *  Expands 1.
 */
static void PH7_SORT_ASC_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1);
	SXUNUSED(pUserData);
}
/*
 * SORT_DESC
 *  Expands 2.
 */
static void PH7_SORT_DESC_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,2);
	SXUNUSED(pUserData);
}
/*
 * SORT_REGULAR
 *  Expands 3.
 */
static void PH7_SORT_REG_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,3);
	SXUNUSED(pUserData);
}
/*
 * SORT_NUMERIC
 *  Expands 4.
 */
static void PH7_SORT_NUMERIC_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,4);
	SXUNUSED(pUserData);
}
/*
 * SORT_STRING
 *  Expands 5.
 */
static void PH7_SORT_STRING_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,5);
	SXUNUSED(pUserData);
}
/*
 * PHP_ROUND_HALF_UP
 *  Expands 1.
 */
static void PH7_PHP_ROUND_HALF_UP_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,1);
	SXUNUSED(pUserData);
}
/*
 * SPHP_ROUND_HALF_DOWN
 *  Expands 2.
 */
static void PH7_PHP_ROUND_HALF_DOWN_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,2);
	SXUNUSED(pUserData);
}
/*
 * PHP_ROUND_HALF_EVEN
 *  Expands 3.
 */
static void PH7_PHP_ROUND_HALF_EVEN_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,3);
	SXUNUSED(pUserData);
}
/*
 * PHP_ROUND_HALF_ODD
 *  Expands 4.
 */
static void PH7_PHP_ROUND_HALF_ODD_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,4);
	SXUNUSED(pUserData);
}
/*
 * DEBUG_BACKTRACE_PROVIDE_OBJECT
 *  Expand 0x01 
 * NOTE:
 *  The expanded value must be a power of two.
 */
static void PH7_DBPO_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,0x01); /* MUST BE A POWER OF TWO */
	SXUNUSED(pUserData);
}
/*
 * DEBUG_BACKTRACE_IGNORE_ARGS
 *  Expand 0x02 
 * NOTE:
 *  The expanded value must be a power of two.
 */
static void PH7_DBIA_Const(ph7_value *pVal,void *pUserData)
{
	ph7_value_int(pVal,0x02); /* MUST BE A POWER OF TWO */
	SXUNUSED(pUserData);
}
#ifdef PH7_ENABLE_MATH_FUNC
/*
 * M_PI
 *  Expand the value of pi.
 */
static void PH7_M_PI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,PH7_PI);
}
/*
 * M_E
 *  Expand 2.7182818284590452354
 */
static void PH7_M_E_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,2.7182818284590452354);
}
/*
 * M_LOG2E
 *  Expand 2.7182818284590452354
 */
static void PH7_M_LOG2E_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.4426950408889634074);
}
/*
 * M_LOG10E
 *  Expand 0.4342944819032518276
 */
static void PH7_M_LOG10E_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.4342944819032518276);
}
/*
 * M_LN2
 *  Expand 	0.69314718055994530942
 */
static void PH7_M_LN2_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.69314718055994530942);
}
/*
 * M_LN10
 *  Expand 	2.30258509299404568402
 */
static void PH7_M_LN10_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,2.30258509299404568402);
}
/*
 * M_PI_2
 *  Expand 	1.57079632679489661923
 */
static void PH7_M_PI_2_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.57079632679489661923);
}
/*
 * M_PI_4
 *  Expand 	0.78539816339744830962
 */
static void PH7_M_PI_4_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.78539816339744830962);
}
/*
 * M_1_PI
 *  Expand 	0.31830988618379067154
 */
static void PH7_M_1_PI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.31830988618379067154);
}
/*
 * M_2_PI
 *  Expand 0.63661977236758134308
 */
static void PH7_M_2_PI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.63661977236758134308);
}
/*
 * M_SQRTPI
 *  Expand 1.77245385090551602729
 */
static void PH7_M_SQRTPI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.77245385090551602729);
}
/*
 * M_2_SQRTPI
 *  Expand 	1.12837916709551257390
 */
static void PH7_M_2_SQRTPI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.12837916709551257390);
}
/*
 * M_SQRT2
 *  Expand 	1.41421356237309504880
 */
static void PH7_M_SQRT2_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.41421356237309504880);
}
/*
 * M_SQRT3
 *  Expand 	1.73205080756887729352
 */
static void PH7_M_SQRT3_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.73205080756887729352);
}
/*
 * M_SQRT1_2
 *  Expand 	0.70710678118654752440
 */
static void PH7_M_SQRT1_2_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.70710678118654752440);
}
/*
 * M_LNPI
 *  Expand 	1.14472988584940017414
 */
static void PH7_M_LNPI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,1.14472988584940017414);
}
/*
 * M_EULER
 *  Expand  0.57721566490153286061
 */
static void PH7_M_EULER_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_double(pVal,0.57721566490153286061);
}
#endif /* PH7_DISABLE_BUILTIN_MATH */
/*
 * DATE_ATOM
 *  Expand Atom (example: 2005-08-15T15:52:01+00:00) 
 */
static void PH7_DATE_ATOM_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"Y-m-d\\TH:i:sP",-1/*Compute length automatically*/);
}
/*
 * DATE_COOKIE
 *  HTTP Cookies (example: Monday, 15-Aug-05 15:52:01 UTC)  
 */
static void PH7_DATE_COOKIE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"l, d-M-y H:i:s T",-1/*Compute length automatically*/);
}
/*
 * DATE_ISO8601
 *  ISO-8601 (example: 2005-08-15T15:52:01+0000) 
 */
static void PH7_DATE_ISO8601_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"Y-m-d\\TH:i:sO",-1/*Compute length automatically*/);
}
/*
 * DATE_RFC822
 *  RFC 822 (example: Mon, 15 Aug 05 15:52:01 +0000) 
 */
static void PH7_DATE_RFC822_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"D, d M y H:i:s O",-1/*Compute length automatically*/);
}
/*
 * DATE_RFC850
 *  RFC 850 (example: Monday, 15-Aug-05 15:52:01 UTC) 
 */
static void PH7_DATE_RFC850_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"l, d-M-y H:i:s T",-1/*Compute length automatically*/);
}
/*
 * DATE_RFC1036
 *  RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000) 
 */
static void PH7_DATE_RFC1036_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"D, d M y H:i:s O",-1/*Compute length automatically*/);
}
/*
 * DATE_RFC1123
 *  RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000)  
 */
static void PH7_DATE_RFC1123_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"D, d M Y H:i:s O",-1/*Compute length automatically*/);
}
/*
 * DATE_RFC2822
 *  RFC 2822 (Mon, 15 Aug 2005 15:52:01 +0000)  
 */
static void PH7_DATE_RFC2822_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"D, d M Y H:i:s O",-1/*Compute length automatically*/);
}
/*
 * DATE_RSS
 *  RSS (Mon, 15 Aug 2005 15:52:01 +0000) 
 */
static void PH7_DATE_RSS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"D, d M Y H:i:s O",-1/*Compute length automatically*/);
}
/*
 * DATE_W3C
 *  World Wide Web Consortium (example: 2005-08-15T15:52:01+00:00) 
 */
static void PH7_DATE_W3C_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"Y-m-d\\TH:i:sP",-1/*Compute length automatically*/);
}
/*
 * ENT_COMPAT
 *  Expand 0x01 (Must be a power of two)
 */
static void PH7_ENT_COMPAT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x01);
}
/*
 * ENT_QUOTES
 *  Expand 0x02 (Must be a power of two)
 */
static void PH7_ENT_QUOTES_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x02);
}
/*
 * ENT_NOQUOTES
 *  Expand 0x04 (Must be a power of two)
 */
static void PH7_ENT_NOQUOTES_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x04);
}
/*
 * ENT_IGNORE
 *  Expand 0x08 (Must be a power of two)
 */
static void PH7_ENT_IGNORE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x08);
}
/*
 * ENT_SUBSTITUTE
 *  Expand 0x10 (Must be a power of two)
 */
static void PH7_ENT_SUBSTITUTE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x10);
}
/*
 * ENT_DISALLOWED
 *  Expand 0x20 (Must be a power of two)
 */
static void PH7_ENT_DISALLOWED_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x20);
}
/*
 * ENT_HTML401
 *  Expand 0x40 (Must be a power of two)
 */
static void PH7_ENT_HTML401_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x40);
}
/*
 * ENT_XML1
 *  Expand 0x80 (Must be a power of two)
 */
static void PH7_ENT_XML1_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x80);
}
/*
 * ENT_XHTML
 *  Expand 0x100 (Must be a power of two)
 */
static void PH7_ENT_XHTML_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x100);
}
/*
 * ENT_HTML5
 *  Expand 0x200 (Must be a power of two)
 */
static void PH7_ENT_HTML5_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x200);
}
/*
 * ISO-8859-1
 * ISO_8859_1
 *   Expand 1
 */
static void PH7_ISO88591_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * UTF-8
 * UTF8
 *  Expand 2
 */
static void PH7_UTF8_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * HTML_ENTITIES
 *  Expand 1
 */
static void PH7_HTML_ENTITIES_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * HTML_SPECIALCHARS
 *  Expand 2
 */
static void PH7_HTML_SPECIALCHARS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * PHP_URL_SCHEME.
 * Expand 1
 */
static void PH7_PHP_URL_SCHEME_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * PHP_URL_HOST.
 * Expand 2
 */
static void PH7_PHP_URL_HOST_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * PHP_URL_PORT.
 * Expand 3
 */
static void PH7_PHP_URL_PORT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,3);
}
/*
 * PHP_URL_USER.
 * Expand 4
 */
static void PH7_PHP_URL_USER_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,4);
}
/*
 * PHP_URL_PASS.
 * Expand 5
 */
static void PH7_PHP_URL_PASS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,5);
}
/*
 * PHP_URL_PATH.
 * Expand 6
 */
static void PH7_PHP_URL_PATH_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,6);
}
/*
 * PHP_URL_QUERY.
 * Expand 7
 */
static void PH7_PHP_URL_QUERY_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,7);
}
/*
 * PHP_URL_FRAGMENT.
 * Expand 8
 */
static void PH7_PHP_URL_FRAGMENT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,8);
}
/*
 * PHP_QUERY_RFC1738
 * Expand 1
 */
static void PH7_PHP_QUERY_RFC1738_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * PHP_QUERY_RFC3986
 * Expand 1
 */
static void PH7_PHP_QUERY_RFC3986_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * FNM_NOESCAPE
 *  Expand 0x01 (Must be a power of two)
 */
static void PH7_FNM_NOESCAPE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x01);
}
/*
 * FNM_PATHNAME
 *  Expand 0x02 (Must be a power of two)
 */
static void PH7_FNM_PATHNAME_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x02);
}
/*
 * FNM_PERIOD
 *  Expand 0x04 (Must be a power of two)
 */
static void PH7_FNM_PERIOD_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x04);
}
/*
 * FNM_CASEFOLD
 *  Expand 0x08 (Must be a power of two)
 */
static void PH7_FNM_CASEFOLD_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x08);
}
/*
 * PATHINFO_DIRNAME
 *  Expand 1.
 */
static void PH7_PATHINFO_DIRNAME_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * PATHINFO_BASENAME
 *  Expand 2.
 */
static void PH7_PATHINFO_BASENAME_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * PATHINFO_EXTENSION
 *  Expand 3.
 */
static void PH7_PATHINFO_EXTENSION_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,3);
}
/*
 * PATHINFO_FILENAME
 *  Expand 4.
 */
static void PH7_PATHINFO_FILENAME_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,4);
}
/*
 * ASSERT_ACTIVE.
 *  Expand the value of PH7_ASSERT_ACTIVE defined in ph7Int.h
 */
static void PH7_ASSERT_ACTIVE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,PH7_ASSERT_DISABLE);
}
/*
 * ASSERT_WARNING.
 *  Expand the value of PH7_ASSERT_WARNING defined in ph7Int.h
 */
static void PH7_ASSERT_WARNING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,PH7_ASSERT_WARNING);
}
/*
 * ASSERT_BAIL.
 *  Expand the value of PH7_ASSERT_BAIL defined in ph7Int.h
 */
static void PH7_ASSERT_BAIL_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,PH7_ASSERT_BAIL);
}
/*
 * ASSERT_QUIET_EVAL.
 *  Expand the value of PH7_ASSERT_QUIET_EVAL defined in ph7Int.h
 */
static void PH7_ASSERT_QUIET_EVAL_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,PH7_ASSERT_QUIET_EVAL);
}
/*
 * ASSERT_CALLBACK.
 *  Expand the value of PH7_ASSERT_CALLBACK defined in ph7Int.h
 */
static void PH7_ASSERT_CALLBACK_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,PH7_ASSERT_CALLBACK);
}
/*
 * SEEK_SET.
 *  Expand 0
 */
static void PH7_SEEK_SET_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0);
}
/*
 * SEEK_CUR.
 *  Expand 1
 */
static void PH7_SEEK_CUR_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * SEEK_END.
 *  Expand 2
 */
static void PH7_SEEK_END_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * LOCK_SH.
 *  Expand 2
 */
static void PH7_LOCK_SH_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * LOCK_NB.
 *  Expand 5
 */
static void PH7_LOCK_NB_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,5);
}
/*
 * LOCK_EX.
 *  Expand 0x01 (MUST BE A POWER OF TWO)
 */
static void PH7_LOCK_EX_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x01);
}
/*
 * LOCK_UN.
 *  Expand 0
 */
static void PH7_LOCK_UN_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0);
}
/*
 * FILE_USE_INCLUDE_PATH
 *  Expand 0x01 (Must be a power of two)
 */
static void PH7_FILE_USE_INCLUDE_PATH_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x1);
}
/*
 * FILE_IGNORE_NEW_LINES
 *  Expand 0x02 (Must be a power of two)
 */
static void PH7_FILE_IGNORE_NEW_LINES_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x2);
}
/*
 * FILE_SKIP_EMPTY_LINES
 *  Expand 0x04 (Must be a power of two)
 */
static void PH7_FILE_SKIP_EMPTY_LINES_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x4);
}
/*
 * FILE_APPEND
 *  Expand 0x08 (Must be a power of two)
 */
static void PH7_FILE_APPEND_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x08);
}
/*
 * SCANDIR_SORT_ASCENDING
 *  Expand 0
 */
static void PH7_SCANDIR_SORT_ASCENDING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0);
}
/*
 * SCANDIR_SORT_DESCENDING
 *  Expand 1
 */
static void PH7_SCANDIR_SORT_DESCENDING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * SCANDIR_SORT_NONE
 *  Expand 2
 */
static void PH7_SCANDIR_SORT_NONE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * GLOB_MARK
 *  Expand 0x01 (must be a power of two)
 */
static void PH7_GLOB_MARK_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x01);
}
/*
 * GLOB_NOSORT
 *  Expand 0x02 (must be a power of two)
 */
static void PH7_GLOB_NOSORT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x02);
}
/*
 * GLOB_NOCHECK
 *  Expand 0x04 (must be a power of two)
 */
static void PH7_GLOB_NOCHECK_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x04);
}
/*
 * GLOB_NOESCAPE
 *  Expand 0x08 (must be a power of two)
 */
static void PH7_GLOB_NOESCAPE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x08);
}
/*
 * GLOB_BRACE
 *  Expand 0x10 (must be a power of two)
 */
static void PH7_GLOB_BRACE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x10);
}
/*
 * GLOB_ONLYDIR
 *  Expand 0x20 (must be a power of two)
 */
static void PH7_GLOB_ONLYDIR_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x20);
}
/*
 * GLOB_ERR
 *  Expand 0x40 (must be a power of two)
 */
static void PH7_GLOB_ERR_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x40);
}
/*
 * STDIN
 *  Expand the STDIN handle as a resource.
 */
static void PH7_STDIN_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	void *pResource;
	pResource = PH7_ExportStdin(pVm);
	ph7_value_resource(pVal,pResource);
}
/*
 * STDOUT
 *   Expand the STDOUT handle as a resource.
 */
static void PH7_STDOUT_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	void *pResource;
	pResource = PH7_ExportStdout(pVm);
	ph7_value_resource(pVal,pResource);
}
/*
 * STDERR
 *  Expand the STDERR handle as a resource.
 */
static void PH7_STDERR_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	void *pResource;
	pResource = PH7_ExportStderr(pVm);
	ph7_value_resource(pVal,pResource);
}
/*
 * INI_SCANNER_NORMAL
 *   Expand 1
 */
static void PH7_INI_SCANNER_NORMAL_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,1);
}
/*
 * INI_SCANNER_RAW
 *   Expand 2
 */
static void PH7_INI_SCANNER_RAW_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,2);
}
/*
 * EXTR_OVERWRITE
 *   Expand 0x01 (Must be a power of two)
 */
static void PH7_EXTR_OVERWRITE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x1);
}
/*
 * EXTR_SKIP
 *   Expand 0x02 (Must be a power of two)
 */
static void PH7_EXTR_SKIP_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x2);
}
/*
 * EXTR_PREFIX_SAME
 *   Expand 0x04 (Must be a power of two)
 */
static void PH7_EXTR_PREFIX_SAME_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x4);
}
/*
 * EXTR_PREFIX_ALL
 *   Expand 0x08 (Must be a power of two)
 */
static void PH7_EXTR_PREFIX_ALL_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x8);
}
/*
 * EXTR_PREFIX_INVALID
 *   Expand 0x10 (Must be a power of two)
 */
static void PH7_EXTR_PREFIX_INVALID_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x10);
}
/*
 * EXTR_IF_EXISTS
 *   Expand 0x20 (Must be a power of two)
 */
static void PH7_EXTR_IF_EXISTS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x20);
}
/*
 * EXTR_PREFIX_IF_EXISTS
 *   Expand 0x40 (Must be a power of two)
 */
static void PH7_EXTR_PREFIX_IF_EXISTS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,0x40);
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
/*
 * XML_ERROR_NONE
 *   Expand the value of SXML_ERROR_NO_MEMORY defined in ph7Int.h
 */
static void PH7_XML_ERROR_NONE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_NO_MEMORY);
}
/*
 * XML_ERROR_NO_MEMORY
 *   Expand the value of SXML_ERROR_NONE defined in ph7Int.h
 */
static void PH7_XML_ERROR_NO_MEMORY_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_NO_MEMORY);
}
/*
 * XML_ERROR_SYNTAX
 *   Expand the value of SXML_ERROR_SYNTAX defined in ph7Int.h
 */
static void PH7_XML_ERROR_SYNTAX_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_SYNTAX);
}
/*
 * XML_ERROR_NO_ELEMENTS
 *   Expand the value of SXML_ERROR_NO_ELEMENTS defined in ph7Int.h
 */
static void PH7_XML_ERROR_NO_ELEMENTS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_NO_ELEMENTS);
}
/*
 * XML_ERROR_INVALID_TOKEN
 *   Expand the value of SXML_ERROR_INVALID_TOKEN defined in ph7Int.h
 */
static void PH7_XML_ERROR_INVALID_TOKEN_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_INVALID_TOKEN);
}
/*
 * XML_ERROR_UNCLOSED_TOKEN
 *   Expand the value of SXML_ERROR_UNCLOSED_TOKEN defined in ph7Int.h
 */
static void PH7_XML_ERROR_UNCLOSED_TOKEN_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_UNCLOSED_TOKEN);
}
/*
 * XML_ERROR_PARTIAL_CHAR
 *   Expand the value of SXML_ERROR_PARTIAL_CHAR defined in ph7Int.h
 */
static void PH7_XML_ERROR_PARTIAL_CHAR_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_PARTIAL_CHAR);
}
/*
 * XML_ERROR_TAG_MISMATCH
 *   Expand the value of SXML_ERROR_TAG_MISMATCH defined in ph7Int.h
 */
static void PH7_XML_ERROR_TAG_MISMATCH_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_TAG_MISMATCH);
}
/*
 * XML_ERROR_DUPLICATE_ATTRIBUTE
 *   Expand the value of SXML_ERROR_DUPLICATE_ATTRIBUTE defined in ph7Int.h
 */
static void PH7_XML_ERROR_DUPLICATE_ATTRIBUTE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_DUPLICATE_ATTRIBUTE);
}
/*
 * XML_ERROR_JUNK_AFTER_DOC_ELEMENT
 *   Expand the value of SXML_ERROR_JUNK_AFTER_DOC_ELEMENT defined in ph7Int.h
 */
static void PH7_XML_ERROR_JUNK_AFTER_DOC_ELEMENT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_JUNK_AFTER_DOC_ELEMENT);
}
/*
 * XML_ERROR_PARAM_ENTITY_REF
 *   Expand the value of SXML_ERROR_PARAM_ENTITY_REF defined in ph7Int.h
 */
static void PH7_XML_ERROR_PARAM_ENTITY_REF_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_PARAM_ENTITY_REF);
}
/*
 * XML_ERROR_UNDEFINED_ENTITY
 *   Expand the value of SXML_ERROR_UNDEFINED_ENTITY defined in ph7Int.h
 */
static void PH7_XML_ERROR_UNDEFINED_ENTITY_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_UNDEFINED_ENTITY);
}
/*
 * XML_ERROR_RECURSIVE_ENTITY_REF
 *   Expand the value of SXML_ERROR_RECURSIVE_ENTITY_REF defined in ph7Int.h
 */
static void PH7_XML_ERROR_RECURSIVE_ENTITY_REF_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_RECURSIVE_ENTITY_REF);
}
/*
 * XML_ERROR_ASYNC_ENTITY
 *   Expand the value of SXML_ERROR_ASYNC_ENTITY defined in ph7Int.h
 */
static void PH7_XML_ERROR_ASYNC_ENTITY_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_ASYNC_ENTITY);
}
/*
 * XML_ERROR_BAD_CHAR_REF
 *   Expand the value of SXML_ERROR_BAD_CHAR_REF defined in ph7Int.h
 */
static void PH7_XML_ERROR_BAD_CHAR_REF_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_BAD_CHAR_REF);
}
/*
 * XML_ERROR_BINARY_ENTITY_REF
 *   Expand the value of SXML_ERROR_BINARY_ENTITY_REF defined in ph7Int.h
 */
static void PH7_XML_ERROR_BINARY_ENTITY_REF_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_BINARY_ENTITY_REF);
}
/*
 * XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF
 *   Expand the value of SXML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF defined in ph7Int.h
 */
static void PH7_XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF);
}
/*
 * XML_ERROR_MISPLACED_XML_PI
 *   Expand the value of SXML_ERROR_MISPLACED_XML_PI defined in ph7Int.h
 */
static void PH7_XML_ERROR_MISPLACED_XML_PI_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_MISPLACED_XML_PI);
}
/*
 * XML_ERROR_UNKNOWN_ENCODING
 *   Expand the value of SXML_ERROR_UNKNOWN_ENCODING defined in ph7Int.h
 */
static void PH7_XML_ERROR_UNKNOWN_ENCODING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_UNKNOWN_ENCODING);
}
/*
 * XML_ERROR_INCORRECT_ENCODING
 *   Expand the value of SXML_ERROR_INCORRECT_ENCODING defined in ph7Int.h
 */
static void PH7_XML_ERROR_INCORRECT_ENCODING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_INCORRECT_ENCODING);
}
/*
 * XML_ERROR_UNCLOSED_CDATA_SECTION
 *   Expand the value of SXML_ERROR_UNCLOSED_CDATA_SECTION defined in ph7Int.h
 */
static void PH7_XML_ERROR_UNCLOSED_CDATA_SECTION_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_UNCLOSED_CDATA_SECTION);
}
/*
 * XML_ERROR_EXTERNAL_ENTITY_HANDLING
 *   Expand the value of SXML_ERROR_EXTERNAL_ENTITY_HANDLING defined in ph7Int.h
 */
static void PH7_XML_ERROR_EXTERNAL_ENTITY_HANDLING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_ERROR_EXTERNAL_ENTITY_HANDLING);
}
/*
 * XML_OPTION_CASE_FOLDING
 *   Expand the value of SXML_OPTION_CASE_FOLDING defined in ph7Int.h.
 */
static void PH7_XML_OPTION_CASE_FOLDING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_OPTION_CASE_FOLDING);
}
/*
 * XML_OPTION_TARGET_ENCODING
 *   Expand the value of SXML_OPTION_TARGET_ENCODING defined in ph7Int.h.
 */
static void PH7_XML_OPTION_TARGET_ENCODING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_OPTION_TARGET_ENCODING);
}
/*
 * XML_OPTION_SKIP_TAGSTART
 *   Expand the value of SXML_OPTION_SKIP_TAGSTART defined in ph7Int.h.
 */
static void PH7_XML_OPTION_SKIP_TAGSTART_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_OPTION_SKIP_TAGSTART);
}
/*
 * XML_OPTION_SKIP_WHITE
 *   Expand the value of SXML_OPTION_SKIP_TAGSTART defined in ph7Int.h.
 */
static void PH7_XML_OPTION_SKIP_WHITE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,SXML_OPTION_SKIP_WHITE);
}
/*
 * XML_SAX_IMPL.
 *   Expand the name of the underlying XML engine.
 */
static void PH7_XML_SAX_IMP_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_string(pVal,"Symisc XML engine",(int)sizeof("Symisc XML engine")-1);
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/*
 * JSON_HEX_TAG.
 *   Expand the value of JSON_HEX_TAG defined in ph7Int.h.
 */
static void PH7_JSON_HEX_TAG_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_HEX_TAG);
}
/*
 * JSON_HEX_AMP.
 *   Expand the value of JSON_HEX_AMP defined in ph7Int.h.
 */
static void PH7_JSON_HEX_AMP_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_HEX_AMP);
}
/*
 * JSON_HEX_APOS.
 *   Expand the value of JSON_HEX_APOS defined in ph7Int.h.
 */
static void PH7_JSON_HEX_APOS_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_HEX_APOS);
}
/*
 * JSON_HEX_QUOT.
 *   Expand the value of JSON_HEX_QUOT defined in ph7Int.h.
 */
static void PH7_JSON_HEX_QUOT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_HEX_QUOT);
}
/*
 * JSON_FORCE_OBJECT.
 *   Expand the value of JSON_FORCE_OBJECT defined in ph7Int.h.
 */
static void PH7_JSON_FORCE_OBJECT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_FORCE_OBJECT);
}
/*
 * JSON_NUMERIC_CHECK.
 *   Expand the value of JSON_NUMERIC_CHECK defined in ph7Int.h.
 */
static void PH7_JSON_NUMERIC_CHECK_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_NUMERIC_CHECK);
}
/*
 * JSON_BIGINT_AS_STRING.
 *   Expand the value of JSON_BIGINT_AS_STRING defined in ph7Int.h.
 */
static void PH7_JSON_BIGINT_AS_STRING_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_BIGINT_AS_STRING);
}
/*
 * JSON_PRETTY_PRINT.
 *   Expand the value of JSON_PRETTY_PRINT defined in ph7Int.h.
 */
static void PH7_JSON_PRETTY_PRINT_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_PRETTY_PRINT);
}
/*
 * JSON_UNESCAPED_SLASHES.
 *   Expand the value of JSON_UNESCAPED_SLASHES defined in ph7Int.h.
 */
static void PH7_JSON_UNESCAPED_SLASHES_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_UNESCAPED_SLASHES);
}
/*
 * JSON_UNESCAPED_UNICODE.
 *   Expand the value of JSON_UNESCAPED_UNICODE defined in ph7Int.h.
 */
static void PH7_JSON_UNESCAPED_UNICODE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_UNESCAPED_UNICODE);
}
/*
 * JSON_ERROR_NONE.
 *   Expand the value of JSON_ERROR_NONE defined in ph7Int.h.
 */
static void PH7_JSON_ERROR_NONE_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_ERROR_NONE);
}
/*
 * JSON_ERROR_DEPTH.
 *   Expand the value of JSON_ERROR_DEPTH defined in ph7Int.h.
 */
static void PH7_JSON_ERROR_DEPTH_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_ERROR_DEPTH);
}
/*
 * JSON_ERROR_STATE_MISMATCH.
 *   Expand the value of JSON_ERROR_STATE_MISMATCH defined in ph7Int.h.
 */
static void PH7_JSON_ERROR_STATE_MISMATCH_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_ERROR_STATE_MISMATCH);
}
/*
 * JSON_ERROR_CTRL_CHAR.
 *   Expand the value of JSON_ERROR_CTRL_CHAR defined in ph7Int.h.
 */
static void PH7_JSON_ERROR_CTRL_CHAR_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_ERROR_CTRL_CHAR);
}
/*
 * JSON_ERROR_SYNTAX.
 *   Expand the value of JSON_ERROR_SYNTAX defined in ph7Int.h.
 */
static void PH7_JSON_ERROR_SYNTAX_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_ERROR_SYNTAX);
}
/*
 * JSON_ERROR_UTF8.
 *   Expand the value of JSON_ERROR_UTF8 defined in ph7Int.h.
 */
static void PH7_JSON_ERROR_UTF8_Const(ph7_value *pVal,void *pUserData)
{
	SXUNUSED(pUserData); /* cc warning */
	ph7_value_int(pVal,JSON_ERROR_UTF8);
}
/*
 * static
 *  Expand the name of the current class. 'static' otherwise.
 */
static void PH7_static_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	ph7_class *pClass;
	/* Extract the target class if available */
	pClass = PH7_VmPeekTopClass(pVm);
	if( pClass ){
		SyString *pName = &pClass->sName;
		/* Expand class name */
		ph7_value_string(pVal,pName->zString,(int)pName->nByte);
	}else{
		/* Expand 'static' */
		ph7_value_string(pVal,"static",sizeof("static")-1);
	}
}
/*
 * self
 * __CLASS__
 *  Expand the name of the current class. NULL otherwise.
 */
static void PH7_self_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	ph7_class *pClass;
	/* Extract the target class if available */
	pClass = PH7_VmPeekTopClass(pVm);
	if( pClass ){
		SyString *pName = &pClass->sName;
		/* Expand class name */
		ph7_value_string(pVal,pName->zString,(int)pName->nByte);
	}else{
		/* Expand null */
		ph7_value_null(pVal);
	}
}
/* parent
 *  Expand the name of the parent class. NULL otherwise.
 */
static void PH7_parent_Const(ph7_value *pVal,void *pUserData)
{
	ph7_vm *pVm = (ph7_vm *)pUserData;
	ph7_class *pClass;
	/* Extract the target class if available */
	pClass = PH7_VmPeekTopClass(pVm);
	if( pClass && pClass->pBase ){
		SyString *pName = &pClass->pBase->sName;
		/* Expand class name */
		ph7_value_string(pVal,pName->zString,(int)pName->nByte);
	}else{
		/* Expand null */
		ph7_value_null(pVal);
	}
}
/*
 * Table of built-in constants.
 */
static const ph7_builtin_constant aBuiltIn[] = {
	{"PH7_VERSION",          PH7_VER_Const      },
	{"PH7_ENGINE",           PH7_VER_Const      },
	{"__PH7__",              PH7_VER_Const      },
	{"PHP_OS",               PH7_OS_Const       },
	{"PHP_EOL",              PH7_EOL_Const      },
	{"PHP_INT_MAX",          PH7_INTMAX_Const   },
	{"MAXINT",               PH7_INTMAX_Const   },
	{"PHP_INT_SIZE",         PH7_INTSIZE_Const  },
	{"PATH_SEPARATOR",       PH7_PATHSEP_Const  },
	{"DIRECTORY_SEPARATOR",  PH7_DIRSEP_Const   },
	{"DIR_SEP",              PH7_DIRSEP_Const   },
	{"__TIME__",             PH7_TIME_Const     },
	{"__DATE__",             PH7_DATE_Const     },
	{"__FILE__",             PH7_FILE_Const     },
	{"__DIR__",              PH7_DIR_Const      },
	{"PHP_SHLIB_SUFFIX",     PH7_PHP_SHLIB_SUFFIX_Const },
	{"E_ERROR",              PH7_E_ERROR_Const  },
	{"E_WARNING",            PH7_E_WARNING_Const},
	{"E_PARSE",              PH7_E_PARSE_Const  },
	{"E_NOTICE",             PH7_E_NOTICE_Const },
	{"E_CORE_ERROR",         PH7_E_CORE_ERROR_Const     },
	{"E_CORE_WARNING",       PH7_E_CORE_WARNING_Const   },
	{"E_COMPILE_ERROR",      PH7_E_COMPILE_ERROR_Const  },
	{"E_COMPILE_WARNING",    PH7_E_COMPILE_WARNING_Const  },
	{"E_USER_ERROR",         PH7_E_USER_ERROR_Const    },
	{"E_USER_WARNING",       PH7_E_USER_WARNING_Const  },
	{"E_USER_NOTICE ",       PH7_E_USER_NOTICE_Const   },
	{"E_STRICT",             PH7_E_STRICT_Const        },
	{"E_RECOVERABLE_ERROR",  PH7_E_RECOVERABLE_ERROR_Const  },
	{"E_DEPRECATED",         PH7_E_DEPRECATED_Const    },
	{"E_USER_DEPRECATED",    PH7_E_USER_DEPRECATED_Const  },
	{"E_ALL",                PH7_E_ALL_Const              },
	{"CASE_LOWER",           PH7_CASE_LOWER_Const   },
	{"CASE_UPPER",           PH7_CASE_UPPER_Const   },
	{"STR_PAD_LEFT",         PH7_STR_PAD_LEFT_Const },
	{"STR_PAD_RIGHT",        PH7_STR_PAD_RIGHT_Const},
	{"STR_PAD_BOTH",         PH7_STR_PAD_BOTH_Const },
	{"COUNT_NORMAL",         PH7_COUNT_NORMAL_Const },
	{"COUNT_RECURSIVE",      PH7_COUNT_RECURSIVE_Const },
	{"SORT_ASC",             PH7_SORT_ASC_Const     },
	{"SORT_DESC",            PH7_SORT_DESC_Const    },
	{"SORT_REGULAR",         PH7_SORT_REG_Const     },
	{"SORT_NUMERIC",         PH7_SORT_NUMERIC_Const },
	{"SORT_STRING",          PH7_SORT_STRING_Const  },
	{"PHP_ROUND_HALF_DOWN",  PH7_PHP_ROUND_HALF_DOWN_Const },
	{"PHP_ROUND_HALF_EVEN",  PH7_PHP_ROUND_HALF_EVEN_Const },
	{"PHP_ROUND_HALF_UP",    PH7_PHP_ROUND_HALF_UP_Const   },
	{"PHP_ROUND_HALF_ODD",   PH7_PHP_ROUND_HALF_ODD_Const  },
	{"DEBUG_BACKTRACE_IGNORE_ARGS", PH7_DBIA_Const  },
	{"DEBUG_BACKTRACE_PROVIDE_OBJECT",PH7_DBPO_Const},
#ifdef PH7_ENABLE_MATH_FUNC 
	{"M_PI",                 PH7_M_PI_Const         },
	{"M_E",                  PH7_M_E_Const          },
	{"M_LOG2E",              PH7_M_LOG2E_Const      },
	{"M_LOG10E",             PH7_M_LOG10E_Const     },
	{"M_LN2",                PH7_M_LN2_Const        },
	{"M_LN10",               PH7_M_LN10_Const       },
	{"M_PI_2",               PH7_M_PI_2_Const       },
	{"M_PI_4",               PH7_M_PI_4_Const       },
	{"M_1_PI",               PH7_M_1_PI_Const       },
	{"M_2_PI",               PH7_M_2_PI_Const       },
	{"M_SQRTPI",             PH7_M_SQRTPI_Const     },
	{"M_2_SQRTPI",           PH7_M_2_SQRTPI_Const   },
	{"M_SQRT2",              PH7_M_SQRT2_Const      },
	{"M_SQRT3",              PH7_M_SQRT3_Const      },
	{"M_SQRT1_2",            PH7_M_SQRT1_2_Const    },
	{"M_LNPI",               PH7_M_LNPI_Const       },
	{"M_EULER",              PH7_M_EULER_Const      },
#endif /* PH7_ENABLE_MATH_FUNC */
	{"DATE_ATOM",            PH7_DATE_ATOM_Const    },
	{"DATE_COOKIE",          PH7_DATE_COOKIE_Const  },
	{"DATE_ISO8601",         PH7_DATE_ISO8601_Const },
	{"DATE_RFC822",          PH7_DATE_RFC822_Const  },
	{"DATE_RFC850",          PH7_DATE_RFC850_Const  },
	{"DATE_RFC1036",         PH7_DATE_RFC1036_Const },
	{"DATE_RFC1123",         PH7_DATE_RFC1123_Const },
	{"DATE_RFC2822",         PH7_DATE_RFC2822_Const },
	{"DATE_RFC3339",         PH7_DATE_ATOM_Const    },
	{"DATE_RSS",             PH7_DATE_RSS_Const     },
	{"DATE_W3C",             PH7_DATE_W3C_Const     },
	{"ENT_COMPAT",           PH7_ENT_COMPAT_Const   },
	{"ENT_QUOTES",           PH7_ENT_QUOTES_Const   },
	{"ENT_NOQUOTES",         PH7_ENT_NOQUOTES_Const },
	{"ENT_IGNORE",           PH7_ENT_IGNORE_Const   },
	{"ENT_SUBSTITUTE",       PH7_ENT_SUBSTITUTE_Const},
	{"ENT_DISALLOWED",       PH7_ENT_DISALLOWED_Const},
	{"ENT_HTML401",          PH7_ENT_HTML401_Const  },
	{"ENT_XML1",             PH7_ENT_XML1_Const     },
	{"ENT_XHTML",            PH7_ENT_XHTML_Const    },
	{"ENT_HTML5",            PH7_ENT_HTML5_Const    },
	{"ISO-8859-1",           PH7_ISO88591_Const     },
	{"ISO_8859_1",           PH7_ISO88591_Const     },
	{"UTF-8",                PH7_UTF8_Const         },
	{"UTF8",                 PH7_UTF8_Const         },
	{"HTML_ENTITIES",        PH7_HTML_ENTITIES_Const},
	{"HTML_SPECIALCHARS",    PH7_HTML_SPECIALCHARS_Const },
	{"PHP_URL_SCHEME",       PH7_PHP_URL_SCHEME_Const},
	{"PHP_URL_HOST",         PH7_PHP_URL_HOST_Const},
	{"PHP_URL_PORT",         PH7_PHP_URL_PORT_Const},
	{"PHP_URL_USER",         PH7_PHP_URL_USER_Const},
	{"PHP_URL_PASS",         PH7_PHP_URL_PASS_Const},
	{"PHP_URL_PATH",         PH7_PHP_URL_PATH_Const},
	{"PHP_URL_QUERY",        PH7_PHP_URL_QUERY_Const},
	{"PHP_URL_FRAGMENT",     PH7_PHP_URL_FRAGMENT_Const},
	{"PHP_QUERY_RFC1738",    PH7_PHP_QUERY_RFC1738_Const},
	{"PHP_QUERY_RFC3986",    PH7_PHP_QUERY_RFC3986_Const},
	{"FNM_NOESCAPE",         PH7_FNM_NOESCAPE_Const },
	{"FNM_PATHNAME",         PH7_FNM_PATHNAME_Const },
	{"FNM_PERIOD",           PH7_FNM_PERIOD_Const   },
	{"FNM_CASEFOLD",         PH7_FNM_CASEFOLD_Const },
	{"PATHINFO_DIRNAME",     PH7_PATHINFO_DIRNAME_Const  },
	{"PATHINFO_BASENAME",    PH7_PATHINFO_BASENAME_Const },
	{"PATHINFO_EXTENSION",   PH7_PATHINFO_EXTENSION_Const},
	{"PATHINFO_FILENAME",    PH7_PATHINFO_FILENAME_Const },
	{"ASSERT_ACTIVE",        PH7_ASSERT_ACTIVE_Const     },
	{"ASSERT_WARNING",       PH7_ASSERT_WARNING_Const    },
	{"ASSERT_BAIL",          PH7_ASSERT_BAIL_Const       },
	{"ASSERT_QUIET_EVAL",    PH7_ASSERT_QUIET_EVAL_Const },
	{"ASSERT_CALLBACK",      PH7_ASSERT_CALLBACK_Const   },
	{"SEEK_SET",             PH7_SEEK_SET_Const      },
	{"SEEK_CUR",             PH7_SEEK_CUR_Const      },
	{"SEEK_END",             PH7_SEEK_END_Const      },
	{"LOCK_EX",              PH7_LOCK_EX_Const      },
	{"LOCK_SH",              PH7_LOCK_SH_Const      },
	{"LOCK_NB",              PH7_LOCK_NB_Const      },
	{"LOCK_UN",              PH7_LOCK_UN_Const      },
	{"FILE_USE_INCLUDE_PATH", PH7_FILE_USE_INCLUDE_PATH_Const},
	{"FILE_IGNORE_NEW_LINES", PH7_FILE_IGNORE_NEW_LINES_Const},
	{"FILE_SKIP_EMPTY_LINES", PH7_FILE_SKIP_EMPTY_LINES_Const},
	{"FILE_APPEND",           PH7_FILE_APPEND_Const },
	{"SCANDIR_SORT_ASCENDING", PH7_SCANDIR_SORT_ASCENDING_Const  },
	{"SCANDIR_SORT_DESCENDING",PH7_SCANDIR_SORT_DESCENDING_Const },
	{"SCANDIR_SORT_NONE",     PH7_SCANDIR_SORT_NONE_Const },
	{"GLOB_MARK",            PH7_GLOB_MARK_Const    },
	{"GLOB_NOSORT",          PH7_GLOB_NOSORT_Const  },
	{"GLOB_NOCHECK",         PH7_GLOB_NOCHECK_Const },
	{"GLOB_NOESCAPE",        PH7_GLOB_NOESCAPE_Const},
	{"GLOB_BRACE",           PH7_GLOB_BRACE_Const   },
	{"GLOB_ONLYDIR",         PH7_GLOB_ONLYDIR_Const },
	{"GLOB_ERR",             PH7_GLOB_ERR_Const     },
	{"STDIN",                PH7_STDIN_Const        },
	{"stdin",                PH7_STDIN_Const        },
	{"STDOUT",               PH7_STDOUT_Const       },
	{"stdout",               PH7_STDOUT_Const       },
	{"STDERR",               PH7_STDERR_Const       },
	{"stderr",               PH7_STDERR_Const       },
	{"INI_SCANNER_NORMAL",   PH7_INI_SCANNER_NORMAL_Const },
	{"INI_SCANNER_RAW",      PH7_INI_SCANNER_RAW_Const    },
	{"EXTR_OVERWRITE",       PH7_EXTR_OVERWRITE_Const     },
	{"EXTR_SKIP",            PH7_EXTR_SKIP_Const        },
	{"EXTR_PREFIX_SAME",     PH7_EXTR_PREFIX_SAME_Const },
	{"EXTR_PREFIX_ALL",      PH7_EXTR_PREFIX_ALL_Const  },
	{"EXTR_PREFIX_INVALID",  PH7_EXTR_PREFIX_INVALID_Const },
	{"EXTR_IF_EXISTS",       PH7_EXTR_IF_EXISTS_Const   },
	{"EXTR_PREFIX_IF_EXISTS",PH7_EXTR_PREFIX_IF_EXISTS_Const},
#ifndef PH7_DISABLE_BUILTIN_FUNC
	{"XML_ERROR_NONE",       PH7_XML_ERROR_NONE_Const},
	{"XML_ERROR_NO_MEMORY",  PH7_XML_ERROR_NO_MEMORY_Const},
	{"XML_ERROR_SYNTAX",     PH7_XML_ERROR_SYNTAX_Const},
	{"XML_ERROR_NO_ELEMENTS",PH7_XML_ERROR_NO_ELEMENTS_Const},
	{"XML_ERROR_INVALID_TOKEN", PH7_XML_ERROR_INVALID_TOKEN_Const},
	{"XML_ERROR_UNCLOSED_TOKEN",PH7_XML_ERROR_UNCLOSED_TOKEN_Const},
	{"XML_ERROR_PARTIAL_CHAR",  PH7_XML_ERROR_PARTIAL_CHAR_Const},
	{"XML_ERROR_TAG_MISMATCH",  PH7_XML_ERROR_TAG_MISMATCH_Const},
	{"XML_ERROR_DUPLICATE_ATTRIBUTE",   PH7_XML_ERROR_DUPLICATE_ATTRIBUTE_Const},
	{"XML_ERROR_JUNK_AFTER_DOC_ELEMENT",PH7_XML_ERROR_JUNK_AFTER_DOC_ELEMENT_Const},
	{"XML_ERROR_PARAM_ENTITY_REF",      PH7_XML_ERROR_PARAM_ENTITY_REF_Const},
	{"XML_ERROR_UNDEFINED_ENTITY",      PH7_XML_ERROR_UNDEFINED_ENTITY_Const},
	{"XML_ERROR_RECURSIVE_ENTITY_REF",  PH7_XML_ERROR_RECURSIVE_ENTITY_REF_Const},
	{"XML_ERROR_ASYNC_ENTITY",          PH7_XML_ERROR_ASYNC_ENTITY_Const},
	{"XML_ERROR_BAD_CHAR_REF",          PH7_XML_ERROR_BAD_CHAR_REF_Const},
	{"XML_ERROR_BINARY_ENTITY_REF",     PH7_XML_ERROR_BINARY_ENTITY_REF_Const},
	{"XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF", PH7_XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF_Const},
	{"XML_ERROR_MISPLACED_XML_PI",     PH7_XML_ERROR_MISPLACED_XML_PI_Const},
	{"XML_ERROR_UNKNOWN_ENCODING",     PH7_XML_ERROR_UNKNOWN_ENCODING_Const},
	{"XML_ERROR_INCORRECT_ENCODING",   PH7_XML_ERROR_INCORRECT_ENCODING_Const},
	{"XML_ERROR_UNCLOSED_CDATA_SECTION",  PH7_XML_ERROR_UNCLOSED_CDATA_SECTION_Const},
	{"XML_ERROR_EXTERNAL_ENTITY_HANDLING",PH7_XML_ERROR_EXTERNAL_ENTITY_HANDLING_Const},
	{"XML_OPTION_CASE_FOLDING",           PH7_XML_OPTION_CASE_FOLDING_Const},
	{"XML_OPTION_TARGET_ENCODING",        PH7_XML_OPTION_TARGET_ENCODING_Const},
	{"XML_OPTION_SKIP_TAGSTART",          PH7_XML_OPTION_SKIP_TAGSTART_Const},
	{"XML_OPTION_SKIP_WHITE",             PH7_XML_OPTION_SKIP_WHITE_Const},
	{"XML_SAX_IMPL",           PH7_XML_SAX_IMP_Const},
#endif /* PH7_DISABLE_BUILTIN_FUNC */
	{"JSON_HEX_TAG",           PH7_JSON_HEX_TAG_Const},
	{"JSON_HEX_AMP",           PH7_JSON_HEX_AMP_Const},
	{"JSON_HEX_APOS",          PH7_JSON_HEX_APOS_Const},
	{"JSON_HEX_QUOT",          PH7_JSON_HEX_QUOT_Const},
	{"JSON_FORCE_OBJECT",      PH7_JSON_FORCE_OBJECT_Const},
	{"JSON_NUMERIC_CHECK",     PH7_JSON_NUMERIC_CHECK_Const},
	{"JSON_BIGINT_AS_STRING",  PH7_JSON_BIGINT_AS_STRING_Const},
	{"JSON_PRETTY_PRINT",      PH7_JSON_PRETTY_PRINT_Const},
	{"JSON_UNESCAPED_SLASHES", PH7_JSON_UNESCAPED_SLASHES_Const},
	{"JSON_UNESCAPED_UNICODE", PH7_JSON_UNESCAPED_UNICODE_Const},
	{"JSON_ERROR_NONE",        PH7_JSON_ERROR_NONE_Const},
	{"JSON_ERROR_DEPTH",       PH7_JSON_ERROR_DEPTH_Const},
	{"JSON_ERROR_STATE_MISMATCH", PH7_JSON_ERROR_STATE_MISMATCH_Const},
	{"JSON_ERROR_CTRL_CHAR", PH7_JSON_ERROR_CTRL_CHAR_Const},
	{"JSON_ERROR_SYNTAX",    PH7_JSON_ERROR_SYNTAX_Const},
	{"JSON_ERROR_UTF8",      PH7_JSON_ERROR_UTF8_Const},
	{"static",               PH7_static_Const       },
	{"self",                 PH7_self_Const         },
	{"__CLASS__",            PH7_self_Const         },
	{"parent",               PH7_parent_Const       }
};
/*
 * Register the built-in constants defined above.
 */
PH7_PRIVATE void PH7_RegisterBuiltInConstant(ph7_vm *pVm)
{
	sxu32 n;
	/* 
	 * Note that all built-in constants have access to the ph7 virtual machine
	 * that trigger the constant invocation as their private data.
	 */
	for( n = 0 ; n < SX_ARRAYSIZE(aBuiltIn) ; ++n ){
		ph7_create_constant(&(*pVm),aBuiltIn[n].zName,aBuiltIn[n].xExpand,&(*pVm));
	}
}
/*
 * ----------------------------------------------------------
 * File: compile.c
 * MD5: 85c9bc2bcbb35e9f704442f7b8f3b993
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: compile.c v6.0 Win7 2012-08-18 05:11 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/*
 * This file implement a thread-safe and full-reentrant compiler for the PH7 engine.
 * That is, routines defined in this file takes a stream of tokens and output
 * PH7 bytecode instructions.
 */
/* Forward declaration */
typedef struct LangConstruct LangConstruct;
typedef struct JumpFixup     JumpFixup;
typedef struct Label         Label;
/* Block [i.e: set of statements] control flags */
#define GEN_BLOCK_LOOP        0x001    /* Loop block [i.e: for,while,...] */
#define GEN_BLOCK_PROTECTED   0x002    /* Protected block */
#define GEN_BLOCK_COND        0x004    /* Conditional block [i.e: if(condition){} ]*/
#define GEN_BLOCK_FUNC        0x008    /* Function body */
#define GEN_BLOCK_GLOBAL      0x010    /* Global block (always set)*/
#define GEN_BLOC_NESTED_FUNC  0x020    /* Nested function body */
#define GEN_BLOCK_EXPR        0x040    /* Expression */
#define GEN_BLOCK_STD         0x080    /* Standard block */
#define GEN_BLOCK_EXCEPTION   0x100    /* Exception block [i.e: try{ } }*/
#define GEN_BLOCK_SWITCH      0x200    /* Switch statement */
/*
 * Each label seen in the input is recorded in an instance
 * of the following structure.
 * A label is a target point [i.e: a jump destination] that is specified
 * by an identifier followed by a colon.
 * Example
 *  LABEL:
 *		echo "hello\n";
 */
struct Label
{
	ph7_vm_func *pFunc;  /* Compiled function where the label was declared.NULL otherwise */
	sxu32 nJumpDest;     /* Jump destination */
	SyString sName;      /* Label name */
	sxu32 nLine;         /* Line number this label occurs */
	sxu8 bRef;           /* True if the label was referenced */
};
/*
 * Compilation of some PHP constructs such as if, for, while, the logical or
 * (||) and logical and (&&) operators in expressions requires the
 * generation of forward jumps.
 * Since the destination PC target of these jumps isn't known when the jumps
 * are emitted, we record each forward jump in an instance of the following
 * structure. Those jumps are fixed later when the jump destination is resolved.
 */
struct JumpFixup
{
	sxi32 nJumpType;     /* Jump type. Either TRUE jump, FALSE jump or Unconditional jump */
	sxu32 nInstrIdx;     /* Instruction index to fix later when the jump destination is resolved. */
	/* The following fields are only used by the goto statement */
	SyString sLabel;    /* Label name */
	ph7_vm_func *pFunc; /* Compiled function inside which the goto was emitted. NULL otherwise */
	sxu32 nLine;        /* Track line number */ 
};
/*
 * Each language construct is represented by an instance
 * of the following structure.
 */
struct LangConstruct
{
	sxu32 nID;                     /* Language construct ID [i.e: PH7_TKWRD_WHILE,PH7_TKWRD_FOR,PH7_TKWRD_IF...] */
	ProcLangConstruct xConstruct;  /* C function implementing the language construct */
};
/* Compilation flags */
#define PH7_COMPILE_SINGLE_STMT 0x001 /* Compile a single statement */
/* Token stream synchronization macros */
#define SWAP_TOKEN_STREAM(GEN,START,END)\
	pTmp  = GEN->pEnd;\
	pGen->pIn  = START;\
	pGen->pEnd = END
#define UPDATE_TOKEN_STREAM(GEN)\
	if( GEN->pIn < pTmp ){\
	    GEN->pIn++;\
	}\
	GEN->pEnd = pTmp
#define SWAP_DELIMITER(GEN,START,END)\
	pTmpIn  = GEN->pIn;\
	pTmpEnd = GEN->pEnd;\
	GEN->pIn = START;\
	GEN->pEnd = END
#define RE_SWAP_DELIMITER(GEN)\
	GEN->pIn  = pTmpIn;\
	GEN->pEnd = pTmpEnd
/* Flags related to expression compilation */
#define EXPR_FLAG_LOAD_IDX_STORE    0x001 /* Set the iP2 flag when dealing with the LOAD_IDX instruction */
#define EXPR_FLAG_RDONLY_LOAD       0x002 /* Read-only load, refer to the 'PH7_OP_LOAD' VM instruction for more information */
#define EXPR_FLAG_COMMA_STATEMENT   0x004 /* Treat comma expression as a single statement (used by class attributes) */
/* Forward declaration */
static sxi32 PH7_CompileExpr(ph7_gen_state *pGen,sxi32 iFlags,sxi32 (*xTreeValidator)(ph7_gen_state *,ph7_expr_node *));
/*
 * Local utility routines used in the code generation phase.
 */
/*
 * Check if the given name refer to a valid label.
 * Return SXRET_OK and write a pointer to that label on success.
 * Any other return value indicates no such label.
 */
static sxi32 GenStateGetLabel(ph7_gen_state *pGen,SyString *pName,Label **ppOut)
{
	Label *aLabel;
	sxu32 n;
	/* Perform a linear scan on the label table */
	aLabel = (Label *)SySetBasePtr(&pGen->aLabel);
	for( n = 0 ; n < SySetUsed(&pGen->aLabel) ; ++n ){
		if( SyStringCmp(&aLabel[n].sName,pName,SyMemcmp) == 0 ){
			/* Jump destination found */
			aLabel[n].bRef = TRUE;
			if( ppOut ){
				*ppOut = &aLabel[n];
			}
			return SXRET_OK;
		}
	}
	/* No such destination */
	return SXERR_NOTFOUND;
}
/*
 * Fetch a block that correspond to the given criteria from the stack of
 * compiled blocks.
 * Return a pointer to that block on success. NULL otherwise.
 */
static GenBlock * GenStateFetchBlock(GenBlock *pCurrent,sxi32 iBlockType,sxi32 iCount)
{
	GenBlock *pBlock = pCurrent;
	for(;;){
		if( pBlock->iFlags & iBlockType ){
			iCount--; /* Decrement nesting level */
			if( iCount < 1 ){
				/* Block meet with the desired criteria */
				return pBlock;
			}
		}
		/* Point to the upper block */
		pBlock = pBlock->pParent;
		if( pBlock == 0 || (pBlock->iFlags & (GEN_BLOCK_PROTECTED|GEN_BLOCK_FUNC)) ){
			/* Forbidden */
			break;
		}
	}
	/* No such block */
	return 0;
}
/*
 * Initialize a freshly allocated block instance.
 */
static void GenStateInitBlock(
	ph7_gen_state *pGen, /* Code generator state */
	GenBlock *pBlock,    /* Target block */
	sxi32 iType,         /* Block type [i.e: loop, conditional, function body, etc.]*/
	sxu32 nFirstInstr,   /* First instruction to compile */
	void *pUserData      /* Upper layer private data */
	)
{
	/* Initialize block fields */
	pBlock->nFirstInstr = nFirstInstr;
	pBlock->pUserData   = pUserData;
	pBlock->pGen        = pGen;
	pBlock->iFlags      = iType;
	pBlock->pParent     = 0;
	SySetInit(&pBlock->aJumpFix,&pGen->pVm->sAllocator,sizeof(JumpFixup));
	SySetInit(&pBlock->aPostContFix,&pGen->pVm->sAllocator,sizeof(JumpFixup));
}
/*
 * Allocate a new block instance.
 * Return SXRET_OK and write a pointer to the new instantiated block
 * on success.Otherwise generate a compile-time error and abort
 * processing on failure.
 */
static sxi32 GenStateEnterBlock(
	ph7_gen_state *pGen,  /* Code generator state */
	sxi32 iType,          /* Block type [i.e: loop, conditional, function body, etc.]*/
	sxu32 nFirstInstr,    /* First instruction to compile */
	void *pUserData,      /* Upper layer private data */
	GenBlock **ppBlock    /* OUT: instantiated block */
	)
{
	GenBlock *pBlock;
	/* Allocate a new block instance */
	pBlock = (GenBlock *)SyMemBackendPoolAlloc(&pGen->pVm->sAllocator,sizeof(GenBlock));
	if( pBlock == 0 ){
		/* If the supplied memory subsystem is so sick that we are unable to allocate
		 * a tiny chunk of memory, there is no much we can do here.
		 */
		PH7_GenCompileError(&(*pGen),E_ERROR,1,"Fatal, PH7 engine is running out-of-memory");
		/* Abort processing immediately */
		return SXERR_ABORT;
	}
	/* Zero the structure */
	SyZero(pBlock,sizeof(GenBlock));
	GenStateInitBlock(&(*pGen),pBlock,iType,nFirstInstr,pUserData);
	/* Link to the parent block */
	pBlock->pParent = pGen->pCurrent;
	/* Mark as the current block */
	pGen->pCurrent = pBlock;
	if( ppBlock ){
		/* Write a pointer to the new instance */
		*ppBlock = pBlock;
	}
	return SXRET_OK;
}
/*
 * Release block fields without freeing the whole instance.
 */
static void GenStateReleaseBlock(GenBlock *pBlock)
{
	SySetRelease(&pBlock->aPostContFix);
	SySetRelease(&pBlock->aJumpFix);
}
/*
 * Release a block.
 */
static void GenStateFreeBlock(GenBlock *pBlock)
{
	ph7_gen_state *pGen = pBlock->pGen;
	GenStateReleaseBlock(&(*pBlock));
	/* Free the instance */
	SyMemBackendPoolFree(&pGen->pVm->sAllocator,pBlock);
}
/*
 * POP and release a block from the stack of compiled blocks.
 */
static sxi32 GenStateLeaveBlock(ph7_gen_state *pGen,GenBlock **ppBlock)
{
	GenBlock *pBlock = pGen->pCurrent;
	if( pBlock == 0 ){
		/* No more block to pop */
		return SXERR_EMPTY;
	}
	/* Point to the upper block */
	pGen->pCurrent = pBlock->pParent;
	if( ppBlock ){
		/* Write a pointer to the popped block */
		*ppBlock = pBlock;
	}else{
		/* Safely release the block */
		GenStateFreeBlock(&(*pBlock));	
	}
	return SXRET_OK;
}
/*
 * Emit a forward jump.
 * Notes on forward jumps
 *  Compilation of some PHP constructs such as if,for,while and the logical or
 *  (||) and logical and (&&) operators in expressions requires the
 *  generation of forward jumps.
 *  Since the destination PC target of these jumps isn't known when the jumps
 *  are emitted, we record each forward jump in an instance of the following
 *  structure. Those jumps are fixed later when the jump destination is resolved.
 */
static sxi32 GenStateNewJumpFixup(GenBlock *pBlock,sxi32 nJumpType,sxu32 nInstrIdx)
{
	JumpFixup sJumpFix;
	sxi32 rc;
	/* Init the JumpFixup structure */
	sJumpFix.nJumpType = nJumpType;
	sJumpFix.nInstrIdx = nInstrIdx;
	/* Insert in the jump fixup table */
	rc = SySetPut(&pBlock->aJumpFix,(const void *)&sJumpFix);
	return rc;
}
/*
 * Fix a forward jump now the jump destination is resolved.
 * Return the total number of fixed jumps.
 * Notes on forward jumps:
 *  Compilation of some PHP constructs such as if,for,while and the logical or
 *  (||) and logical and (&&) operators in expressions requires the
 *  generation of forward jumps.
 *  Since the destination PC target of these jumps isn't known when the jumps
 *  are emitted, we record each forward jump in an instance of the following
 *  structure.Those jumps are fixed later when the jump destination is resolved.
 */
static sxu32 GenStateFixJumps(GenBlock *pBlock,sxi32 nJumpType,sxu32 nJumpDest)
{
	JumpFixup *aFix;
	VmInstr *pInstr;
	sxu32 nFixed; 
	sxu32 n;
	/* Point to the jump fixup table */
	aFix = (JumpFixup *)SySetBasePtr(&pBlock->aJumpFix);
	/* Fix the desired jumps */
	for( nFixed = n = 0 ; n < SySetUsed(&pBlock->aJumpFix) ; ++n ){
		if( aFix[n].nJumpType < 0 ){
			/* Already fixed */
			continue;
		}
		if( nJumpType > 0 && aFix[n].nJumpType != nJumpType ){
			/* Not of our interest */
			continue;
		}
		/* Point to the instruction to fix */
		pInstr = PH7_VmGetInstr(pBlock->pGen->pVm,aFix[n].nInstrIdx);
		if( pInstr ){
			pInstr->iP2 = nJumpDest;
			nFixed++;
			/* Mark as fixed */
			aFix[n].nJumpType = -1;
		}
	}
	/* Total number of fixed jumps */
	return nFixed;
}
/*
 * Fix a 'goto' now the jump destination is resolved.
 * The goto statement can be used to jump to another section
 * in the program.
 * Refer to the routine responsible of compiling the goto
 * statement for more information.
 */
static sxi32 GenStateFixGoto(ph7_gen_state *pGen,sxu32 nOfft)
{
	JumpFixup *pJump,*aJumps;
	Label *pLabel,*aLabel;
	VmInstr *pInstr;
	sxi32 rc;
	sxu32 n;
	/* Point to the goto table */
	aJumps = (JumpFixup *)SySetBasePtr(&pGen->aGoto);
	/* Fix */
	for( n = nOfft ; n < SySetUsed(&pGen->aGoto) ; ++n ){
		pJump = &aJumps[n];
		/* Extract the target label */
		rc = GenStateGetLabel(&(*pGen),&pJump->sLabel,&pLabel);
		if( rc != SXRET_OK ){
			/* No such label */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pJump->nLine,"Label '%z' was referenced but not defined",&pJump->sLabel);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			continue;
		}
		/* Make sure the target label is reachable */
		if( pLabel->pFunc != pJump->pFunc ){
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pJump->nLine,"Label '%z' is unreachable",&pJump->sLabel);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		/* Fix the jump now the destination is resolved */
		pInstr = PH7_VmGetInstr(pGen->pVm,pJump->nInstrIdx);
		if( pInstr ){
			pInstr->iP2 = pLabel->nJumpDest;
		}
	}
	aLabel = (Label *)SySetBasePtr(&pGen->aLabel);
	for( n = 0 ; n < SySetUsed(&pGen->aLabel) ; ++n ){
		if( aLabel[n].bRef == FALSE ){
			/* Emit a warning */
			PH7_GenCompileError(&(*pGen),E_WARNING,aLabel[n].nLine,
				"Label '%z' is defined but not referenced",&aLabel[n].sName);
		}
	}
	return SXRET_OK;
}
/*
 * Check if a given token value is installed in the literal table.
 */
static sxi32 GenStateFindLiteral(ph7_gen_state *pGen,const SyString *pValue,sxu32 *pIdx)
{
	SyHashEntry *pEntry;
	pEntry = SyHashGet(&pGen->hLiteral,(const void *)pValue->zString,pValue->nByte);
	if( pEntry == 0 ){
		return SXERR_NOTFOUND;
	}
	*pIdx = (sxu32)SX_PTR_TO_INT(pEntry->pUserData);
	return SXRET_OK;
}
/*
 * Install a given constant index in the literal table.
 * In order to be installed, the ph7_value must be of type string.
 */
static sxi32 GenStateInstallLiteral(ph7_gen_state *pGen,ph7_value *pObj,sxu32 nIdx)
{
	if( SyBlobLength(&pObj->sBlob) > 0 ){
		SyHashInsert(&pGen->hLiteral,SyBlobData(&pObj->sBlob),SyBlobLength(&pObj->sBlob),SX_INT_TO_PTR(nIdx));
	}
	return SXRET_OK;
}
/*
 * Reserve a room for a numeric constant [i.e: 64-bit integer or real number]
 * in the constant table.
 */
static ph7_value * GenStateInstallNumLiteral(ph7_gen_state *pGen,sxu32 *pIdx)
{
	ph7_value *pObj;
	sxu32 nIdx = 0; /* cc warning */
	/* Reserve a new constant */
	pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
	if( pObj == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,1,"PH7 engine is running out of memory");
		return 0;
	}
	*pIdx = nIdx;
	/* TODO(chems): Create a numeric table (64bit int keys) same as 
	 * the constant string iterals table [optimization purposes].
	 */
	return pObj;
}
/*
 * Implementation of the PHP language constructs.
 */
/* Forward declaration */
static sxi32 GenStateCompileChunk(ph7_gen_state *pGen,sxi32 iFlags);
/*
 * Compile a numeric [i.e: integer or real] literal.
 * Notes on the integer type.
 *  According to the PHP language reference manual
 *  Integers can be specified in decimal (base 10), hexadecimal (base 16), octal (base 8)
 *  or binary (base 2) notation, optionally preceded by a sign (- or +). 
 *  To use octal notation, precede the number with a 0 (zero). To use hexadecimal 
 *  notation precede the number with 0x. To use binary notation precede the number with 0b. 
 * Symisc eXtension to the integer type.
 *  PH7 introduced platform-independant 64-bit integer unlike the standard PHP engine
 *  where the size of an integer is platform-dependent.That is,the size of an integer
 *  is 8 bytes and the maximum integer size is 0x7FFFFFFFFFFFFFFF for all platforms
 *  [i.e: either 32bit or 64bit].
 *  For more information on this powerfull extension please refer to the official
 *  documentation.
 */
static sxi32 PH7_CompileNumLiteral(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	SyToken *pToken = pGen->pIn; /* Raw token */
	sxu32 nIdx = 0;
	if( pToken->nType & PH7_TK_INTEGER ){
		ph7_value *pObj;
		sxi64 iValue;
		iValue = PH7_TokenValueToInt64(&pToken->sData);
		pObj = GenStateInstallNumLiteral(&(*pGen),&nIdx);
		if( pObj == 0 ){
			SXUNUSED(iCompileFlag); /* cc warning */
			return SXERR_ABORT;
		}
		PH7_MemObjInitFromInt(pGen->pVm,pObj,iValue);
	}else{
		/* Real number */
		ph7_value *pObj;
		/* Reserve a new constant */
		pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
		if( pObj == 0 ){
			PH7_GenCompileError(&(*pGen),E_ERROR,1,"PH7 engine is running out of memory");
			return SXERR_ABORT;
		}
		PH7_MemObjInitFromString(pGen->pVm,pObj,&pToken->sData);
		PH7_MemObjToReal(pObj);
	}
	/* Emit the load constant instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Compile a single quoted string.
 * According to the PHP language reference manual:
 *
 *   The simplest way to specify a string is to enclose it in single quotes (the character ' ).
 *   To specify a literal single quote, escape it with a backslash (\). To specify a literal
 *   backslash, double it (\\). All other instances of backslash will be treated as a literal
 *   backslash: this means that the other escape sequences you might be used to, such as \r 
 *   or \n, will be output literally as specified rather than having any special meaning.
 * 
 */
PH7_PRIVATE sxi32 PH7_CompileSimpleString(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	SyString *pStr = &pGen->pIn->sData; /* Constant string literal */
	const char *zIn,*zCur,*zEnd;
	ph7_value *pObj;
	sxu32 nIdx;
	nIdx = 0; /* Prevent compiler warning */
	/* Delimit the string */
	zIn  = pStr->zString;
	zEnd = &zIn[pStr->nByte];
	if( zIn >= zEnd ){
		/* Empty string,load NULL */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
		return SXRET_OK;
	}
	if( SXRET_OK == GenStateFindLiteral(&(*pGen),pStr,&nIdx) ){
		/* Already processed,emit the load constant instruction
		 * and return.
		 */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
		return SXRET_OK;
	}
	/* Reserve a new constant */
	pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
	if( pObj == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,1,"PH7 engine is running out of memory");
		SXUNUSED(iCompileFlag); /* cc warning */
		return SXERR_ABORT;
	}
	PH7_MemObjInitFromString(pGen->pVm,pObj,0);
	/* Compile the node */
	for(;;){
		if( zIn >= zEnd ){
			/* End of input */
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '\\' ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Append raw contents*/
			PH7_MemObjStringAppend(pObj,zCur,(sxu32)(zIn-zCur));
		}
		zIn++;
		if( zIn < zEnd ){
			if( zIn[0] == '\\' ){
				/* A literal backslash */
				PH7_MemObjStringAppend(pObj,"\\",sizeof(char));
			}else if( zIn[0] == '\'' ){
				/* A single quote */
				PH7_MemObjStringAppend(pObj,"'",sizeof(char));
			}else{
				/* verbatim copy */
				zIn--;
				PH7_MemObjStringAppend(pObj,zIn,sizeof(char)*2);
				zIn++;
			}
		}
		/* Advance the stream cursor */
		zIn++;
	}
	/* Emit the load constant instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
	if( pStr->nByte < 1024 ){
		/* Install in the literal table */
		GenStateInstallLiteral(pGen,pObj,nIdx);
	}
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Compile a nowdoc string.
 * According to the PHP language reference manual:
 *
 *  Nowdocs are to single-quoted strings what heredocs are to double-quoted strings.
 *  A nowdoc is specified similarly to a heredoc, but no parsing is done inside a nowdoc.
 *  The construct is ideal for embedding PHP code or other large blocks of text without the
 *  need for escaping. It shares some features in common with the SGML <![CDATA[ ]]> 
 *  construct, in that it declares a block of text which is not for parsing.
 *  A nowdoc is identified with the same <<< sequence used for heredocs, but the identifier
 *  which follows is enclosed in single quotes, e.g. <<<'EOT'. All the rules for heredoc 
 *  identifiers also apply to nowdoc identifiers, especially those regarding the appearance
 *  of the closing identifier. 
 */
static sxi32 PH7_CompileNowDoc(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	SyString *pStr = &pGen->pIn->sData; /* Constant string literal */
	ph7_value *pObj;
	sxu32 nIdx;
	nIdx = 0; /* Prevent compiler warning */
	if( pStr->nByte <= 0 ){
		/* Empty string,load NULL */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
		return SXRET_OK;
	}
	/* Reserve a new constant */
	pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
	if( pObj == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"PH7 engine is running out of memory");
		SXUNUSED(iCompileFlag); /* cc warning */
		return SXERR_ABORT;
	}
	/* No processing is done here, simply a memcpy() operation */
	PH7_MemObjInitFromString(pGen->pVm,pObj,pStr);
	/* Emit the load constant instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Process variable expression [i.e: "$var","${var}"] embedded in a double quoted/heredoc string.
 * According to the PHP language reference manual
 *   When a string is specified in double quotes or with heredoc,variables are parsed within it.
 *  There are two types of syntax: a simple one and a complex one. The simple syntax is the most
 *  common and convenient. It provides a way to embed a variable, an array value, or an object
 *  property in a string with a minimum of effort.
 *  Simple syntax
 *   If a dollar sign ($) is encountered, the parser will greedily take as many tokens as possible
 *   to form a valid variable name. Enclose the variable name in curly braces to explicitly specify
 *   the end of the name.
 *   Similarly, an array index or an object property can be parsed. With array indices, the closing
 *   square bracket (]) marks the end of the index. The same rules apply to object properties
 *   as to simple variables. 
 *  Complex (curly) syntax
 *   This isn't called complex because the syntax is complex, but because it allows for the use 
 *   of complex expressions.
 *   Any scalar variable, array element or object property with a string representation can be
 *   included via this syntax. Simply write the expression the same way as it would appear outside
 *   the string, and then wrap it in { and }. Since { can not be escaped, this syntax will only
 *   be recognised when the $ immediately follows the {. Use {\$ to get a literal {$
 */
static sxi32 GenStateProcessStringExpression(
	ph7_gen_state *pGen, /* Code generator state */
	sxu32 nLine,         /* Line number */
	const char *zIn,     /* Raw expression */
	const char *zEnd     /* End of the expression */
	)
{
	SyToken *pTmpIn,*pTmpEnd;
	SySet sToken;
	sxi32 rc;
	/* Initialize the token set */
	SySetInit(&sToken,&pGen->pVm->sAllocator,sizeof(SyToken));
	/* Preallocate some slots */
	SySetAlloc(&sToken,0x08);
	/* Tokenize the text */
	PH7_TokenizePHP(zIn,(sxu32)(zEnd-zIn),nLine,&sToken);
	/* Swap delimiter */
	pTmpIn  = pGen->pIn;
	pTmpEnd = pGen->pEnd;
	pGen->pIn = (SyToken *)SySetBasePtr(&sToken);
	pGen->pEnd = &pGen->pIn[SySetUsed(&sToken)];
	/* Compile the expression */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	/* Restore token stream */
	pGen->pIn  = pTmpIn;
	pGen->pEnd = pTmpEnd;
	/* Release the token set */
	SySetRelease(&sToken);
	/* Compilation result */
	return rc;
}
/*
 * Reserve a new constant for a double quoted/heredoc string.
 */
static ph7_value * GenStateNewStrObj(ph7_gen_state *pGen,sxi32 *pCount)
{
	ph7_value *pConstObj;
	sxu32 nIdx = 0;
	/* Reserve a new constant */
	pConstObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
	if( pConstObj == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"PH7 engine is running out of memory");
		return 0;
	}
	(*pCount)++;
	PH7_MemObjInitFromString(pGen->pVm,pConstObj,0);
	/* Emit the load constant instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
	return pConstObj;
}
/*
 * Compile a double quoted/heredoc string.
 * According to the PHP language reference manual
 * Heredoc
 *  A third way to delimit strings is the heredoc syntax: <<<. After this operator, an identifier
 *  is provided, then a newline. The string itself follows, and then the same identifier again
 *  to close the quotation.
 *  The closing identifier must begin in the first column of the line. Also, the identifier must
 *  follow the same naming rules as any other label in PHP: it must contain only alphanumeric
 *  characters and underscores, and must start with a non-digit character or underscore.
 *  Warning
 *  It is very important to note that the line with the closing identifier must contain
 *  no other characters, except possibly a semicolon (;). That means especially that the identifier
 *  may not be indented, and there may not be any spaces or tabs before or after the semicolon.
 *  It's also important to realize that the first character before the closing identifier must
 *  be a newline as defined by the local operating system. This is \n on UNIX systems, including Mac OS X.
 *  The closing delimiter (possibly followed by a semicolon) must also be followed by a newline.
 *  If this rule is broken and the closing identifier is not "clean", it will not be considered a closing
 *  identifier, and PHP will continue looking for one. If a proper closing identifier is not found before
 *  the end of the current file, a parse error will result at the last line.
 *  Heredocs can not be used for initializing class properties. 
 * Double quoted
 *  If the string is enclosed in double-quotes ("), PHP will interpret more escape sequences for special characters:
 *  Escaped characters Sequence 	Meaning
 *  \n linefeed (LF or 0x0A (10) in ASCII)
 *  \r carriage return (CR or 0x0D (13) in ASCII)
 *  \t horizontal tab (HT or 0x09 (9) in ASCII)
 *  \v vertical tab (VT or 0x0B (11) in ASCII)
 *  \f form feed (FF or 0x0C (12) in ASCII)
 *  \\ backslash
 *  \$ dollar sign
 *  \" double-quote
 *  \[0-7]{1,3} 	the sequence of characters matching the regular expression is a character in octal notation
 *  \x[0-9A-Fa-f]{1,2} 	the sequence of characters matching the regular expression is a character in hexadecimal notation
 * As in single quoted strings, escaping any other character will result in the backslash being printed too.
 * The most important feature of double-quoted strings is the fact that variable names will be expanded.
 * See string parsing for details.
 */
static sxi32 GenStateCompileString(ph7_gen_state *pGen)
{
	SyString *pStr = &pGen->pIn->sData; /* Raw token value */
	const char *zIn,*zCur,*zEnd;
	ph7_value *pObj = 0;
	sxi32 iCons;	
	sxi32 rc;
	/* Delimit the string */
	zIn  = pStr->zString;
	zEnd = &zIn[pStr->nByte];
	if( zIn >= zEnd ){
		/* Empty string,load NULL */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
		return SXRET_OK;
	}
	zCur = 0;
	/* Compile the node */
	iCons = 0;
	for(;;){
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '\\'  ){
			if( zIn[0] == '{' && &zIn[1] < zEnd && zIn[1] == '$' ){
				break;
			}else if(zIn[0] == '$' && &zIn[1] < zEnd &&
				(((unsigned char)zIn[1] >= 0xc0 || SyisAlpha(zIn[1]) || zIn[1] == '{' || zIn[1] == '_')) ){
					break;
			}
			zIn++;
		}
		if( zIn > zCur ){
			if( pObj == 0 ){
				pObj = GenStateNewStrObj(&(*pGen),&iCons);
				if( pObj == 0 ){
					return SXERR_ABORT;
				}
			}
			PH7_MemObjStringAppend(pObj,zCur,(sxu32)(zIn-zCur));
		}
		if( zIn >= zEnd ){
			break;
		}
		if( zIn[0] == '\\' ){
			const char *zPtr = 0;
			sxu32 n;
			zIn++;
			if( zIn >= zEnd ){
				break;
			}
			if( pObj == 0 ){
				pObj = GenStateNewStrObj(&(*pGen),&iCons);
				if( pObj == 0 ){
					return SXERR_ABORT;
				}
			}
			n = sizeof(char); /* size of conversion */
			switch( zIn[0] ){
			case '$':
				/* Dollar sign */
				PH7_MemObjStringAppend(pObj,"$",sizeof(char));
				break;
			case '\\':
				/* A literal backslash */
				PH7_MemObjStringAppend(pObj,"\\",sizeof(char));
				break;
			case 'a':
				/* The "alert" character (BEL)[ctrl+g] ASCII code 7 */
				PH7_MemObjStringAppend(pObj,"\a",sizeof(char));
				break;
			case 'b':
				/* Backspace (BS)[ctrl+h] ASCII code 8 */
				PH7_MemObjStringAppend(pObj,"\b",sizeof(char));
				break;
			case 'f':
				/* Form-feed (FF)[ctrl+l] ASCII code 12 */
				PH7_MemObjStringAppend(pObj,"\f",sizeof(char));
				break;
			case 'n':
				/* Line feed(new line) (LF)[ctrl+j] ASCII code 10 */
				PH7_MemObjStringAppend(pObj,"\n",sizeof(char));
				break;
			case 'r':
				/* Carriage return (CR)[ctrl+m] ASCII code 13 */
				PH7_MemObjStringAppend(pObj,"\r",sizeof(char));
				break;
			case 't':
				/* Horizontal tab (HT)[ctrl+i] ASCII code 9 */
				PH7_MemObjStringAppend(pObj,"\t",sizeof(char));
				break;
			case 'v':
				/* Vertical tab(VT)[ctrl+k] ASCII code 11 */
				PH7_MemObjStringAppend(pObj,"\v",sizeof(char));
				break;
			case '\'':
				/* Single quote */
				PH7_MemObjStringAppend(pObj,"'",sizeof(char));
				break;
			case '"':
				/* Double quote */
				PH7_MemObjStringAppend(pObj,"\"",sizeof(char));
				break;
			case '0':
				/* NUL byte */
				PH7_MemObjStringAppend(pObj,"\0",sizeof(char));
				break;
			case 'x':
				if((unsigned char)zIn[1] < 0xc0 && SyisHex(zIn[1]) ){
					int c;
					/* Hex digit */
					c = SyHexToint(zIn[1]) << 4;
					if( &zIn[2] < zEnd ){
						c +=  SyHexToint(zIn[2]);
					}
					/* Output char */
					PH7_MemObjStringAppend(pObj,(const char *)&c,sizeof(char));
					n += sizeof(char) * 2;
				}else{
					/* Output literal character  */
					PH7_MemObjStringAppend(pObj,"x",sizeof(char));
				}
				break;
			case 'o':
				if( &zIn[1] < zEnd && (unsigned char)zIn[1] < 0xc0 && SyisDigit(zIn[1]) && (zIn[1] - '0') < 8 ){
					/* Octal digit stream */
					int c;
					c = 0;
					zIn++;
					for( zPtr = zIn ; zPtr < &zIn[3*sizeof(char)] ; zPtr++ ){
						if( zPtr >= zEnd || (unsigned char)zPtr[0] >= 0xc0 || !SyisDigit(zPtr[0]) || (zPtr[0] - '0') > 7 ){
							break;
						}
						c = c * 8 + (zPtr[0] - '0');
					}
					if ( c > 0 ){
						PH7_MemObjStringAppend(pObj,(const char *)&c,sizeof(char));
					}
					n = (sxu32)(zPtr-zIn);
				}else{
					/* Output literal character  */
					PH7_MemObjStringAppend(pObj,"o",sizeof(char));
				}
				break;
			default:
				/* Output without a slash */
				PH7_MemObjStringAppend(pObj,zIn,sizeof(char));
				break;
			}
			/* Advance the stream cursor */
			zIn += n;
			continue;
		}
		if( zIn[0] == '{' ){
			/* Curly syntax */
			const char *zExpr;
			sxi32 iNest = 1;
			zIn++;
			zExpr = zIn;
			/* Synchronize with the next closing curly braces */
			while( zIn < zEnd ){
				if( zIn[0] == '{' ){
					/* Increment nesting level */
					iNest++;
				}else if(zIn[0] == '}' ){
					/* Decrement nesting level */
					iNest--;
					if( iNest <= 0 ){
						break;
					}
				}
				zIn++;
			}
			/* Process the expression */
			rc = GenStateProcessStringExpression(&(*pGen),pGen->pIn->nLine,zExpr,zIn);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			if( rc != SXERR_EMPTY ){
				++iCons;
			}
			if( zIn < zEnd ){
				/* Jump the trailing curly */
				zIn++;
			}
		}else{
			/* Simple syntax */
			const char *zExpr = zIn;
			/* Assemble variable name */
			for(;;){
				/* Jump leading dollars */
				while( zIn < zEnd && zIn[0] == '$' ){
					zIn++;
				}
				for(;;){
					while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && (SyisAlphaNum(zIn[0]) || zIn[0] == '_' ) ){
						zIn++;
					}
					if((unsigned char)zIn[0] >= 0xc0 ){
						/* UTF-8 stream */
						zIn++;
						while( zIn < zEnd && (((unsigned char)zIn[0] & 0xc0) == 0x80) ){
							zIn++;
						}
						continue;
					}
					break;
				}
				if( zIn >= zEnd ){
					break;
				}
				if( zIn[0] == '[' ){
					sxi32 iSquare = 1;
					zIn++;
					while( zIn < zEnd ){
						if( zIn[0] == '[' ){
							iSquare++;
						}else if (zIn[0] == ']' ){
							iSquare--;
							if( iSquare <= 0 ){
								break;
							}
						}
						zIn++;
					}
					if( zIn < zEnd ){
						zIn++;
					}
					break;
				}else if(zIn[0] == '{' ){
					sxi32 iCurly = 1;
					zIn++;
					while( zIn < zEnd ){
						if( zIn[0] == '{' ){
							iCurly++;
						}else if (zIn[0] == '}' ){
							iCurly--;
							if( iCurly <= 0 ){
								break;
							}
						}
						zIn++;
					}
					if( zIn < zEnd ){
						zIn++;
					}
					break;
				}else if( zIn[0] == '-' && &zIn[1] < zEnd && zIn[1] == '>' ){
					/* Member access operator '->' */
					zIn += 2;
				}else if(zIn[0] == ':' && &zIn[1] < zEnd && zIn[1] == ':'){
					/* Static member access operator '::' */
					zIn += 2;
				}else{
					break;
				}
			}
			/* Process the expression */
			rc = GenStateProcessStringExpression(&(*pGen),pGen->pIn->nLine,zExpr,zIn);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			if( rc != SXERR_EMPTY ){
				++iCons;
			}
		}
		/* Invalidate the previously used constant */
		pObj = 0;
	}/*for(;;)*/
	if( iCons > 1 ){
		/* Concatenate all compiled constants */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_CAT,iCons,0,0,0);
	}
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Compile a double quoted string.
 *  See the block-comment above for more information.
 */
PH7_PRIVATE sxi32 PH7_CompileString(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	sxi32 rc;
	rc = GenStateCompileString(&(*pGen));
	SXUNUSED(iCompileFlag); /* cc warning */
	/* Compilation result */
	return rc;
}
/*
 * Compile a Heredoc string.
 *  See the block-comment above for more information.
 */
static sxi32 PH7_CompileHereDoc(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	sxi32 rc;
	rc = GenStateCompileString(&(*pGen));
	SXUNUSED(iCompileFlag); /* cc warning */
	/* Compilation result */
	return SXRET_OK;
}
/*
 * Compile an array entry whether it is a key or a value.
 *  Notes on array entries.
 *  According to the PHP language reference manual
 *  An array can be created by the array() language construct.
 *  It takes as parameters any number of comma-separated key => value pairs.
 *  array(  key =>  value
 *    , ...
 *    )
 *  A key may be either an integer or a string. If a key is the standard representation
 *  of an integer, it will be interpreted as such (i.e. "8" will be interpreted as 8, while
 *  "08" will be interpreted as "08"). Floats in key are truncated to integer.
 *  The indexed and associative array types are the same type in PHP, which can both
 *  contain integer and string indices.
 *  A value can be any PHP type.
 *  If a key is not specified for a value, the maximum of the integer indices is taken
 *  and the new key will be that value plus 1. If a key that already has an assigned value
 *  is specified, that value will be overwritten. 
 */
static sxi32 GenStateCompileArrayEntry(
	ph7_gen_state *pGen, /* Code generator state */
	SyToken *pIn,        /* Token stream */
	SyToken *pEnd,       /* End of the token stream */
	sxi32 iFlags,        /* Compilation flags */
	sxi32 (*xValidator)(ph7_gen_state *,ph7_expr_node *) /* Expression tree validator callback */
	)
{
	SyToken *pTmpIn,*pTmpEnd;
	sxi32 rc;
	/* Swap token stream */
	SWAP_DELIMITER(pGen,pIn,pEnd);
	/* Compile the expression*/
	rc = PH7_CompileExpr(&(*pGen),iFlags,xValidator);
	/* Restore token stream */
	RE_SWAP_DELIMITER(pGen);
	return rc;
}
/*
 * Expression tree validator callback for the 'array' language construct.
 * Return SXRET_OK if the tree is valid. Any other return value indicates
 * an invalid expression tree and this function will generate the appropriate
 * error message.
 * See the routine responible of compiling the array language construct
 * for more inforation.
 */
static sxi32 GenStateArrayNodeValidator(ph7_gen_state *pGen,ph7_expr_node *pRoot)
{
	sxi32 rc = SXRET_OK;
	if( pRoot->pOp ){
		if( pRoot->pOp->iOp != EXPR_OP_SUBSCRIPT /* $a[] */ &&
			pRoot->pOp->iOp != EXPR_OP_FUNC_CALL /* function() [Symisc extension: i.e: array(&foo())] */
			&& pRoot->pOp->iOp != EXPR_OP_ARROW /* -> */ && pRoot->pOp->iOp != EXPR_OP_DC /* :: */){
			/* Unexpected expression */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
				"array(): Expecting a variable/array member/function call after reference operator '&'");
			if( rc != SXERR_ABORT ){
				rc = SXERR_INVALID;
			}
		}
	}else if( pRoot->xCode != PH7_CompileVariable ){
		/* Unexpected expression */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
			"array(): Expecting a variable after reference operator '&'");
		if( rc != SXERR_ABORT ){
			rc = SXERR_INVALID;
		}
	}
	return rc;
}
/*
 * Compile the 'array' language construct.
 *	 According to the PHP language reference manual
 *   An array in PHP is actually an ordered map. A map is a type that associates
 *   values to keys. This type is optimized for several different uses; it can
 *   be treated as an array, list (vector), hash table (an implementation of a map)
 *   dictionary, collection, stack, queue, and probably more. As array values can be
 *   other arrays, trees and multidimensional arrays are also possible. 
 */
PH7_PRIVATE sxi32 PH7_CompileArray(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	sxi32 (*xValidator)(ph7_gen_state *,ph7_expr_node *); /* Expression tree validator callback */
	SyToken *pKey,*pCur;
	sxi32 iEmitRef = 0;
	sxi32 nPair = 0;
	sxi32 iNest;
	sxi32 rc;
	/* Jump the 'array' keyword,the leading left parenthesis and the trailing parenthesis.
	 */
	pGen->pIn += 2;
	pGen->pEnd--;
	xValidator = 0;
	SXUNUSED(iCompileFlag); /* cc warning */
	for(;;){
		/* Jump leading commas */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_COMMA) ){
			pGen->pIn++;
		}
		pCur = pGen->pIn;
		if( SXRET_OK != PH7_GetNextExpr(pGen->pIn,pGen->pEnd,&pGen->pIn) ){
			/* No more entry to process */
			break;
		}
		if( pCur >= pGen->pIn ){
			continue;
		}
		/* Compile the key if available */
		pKey = pCur;
		iNest = 0;
		while( pCur < pGen->pIn ){
			if( (pCur->nType & PH7_TK_ARRAY_OP) && iNest <= 0 ){
				break;
			}
			if( pCur->nType & PH7_TK_LPAREN /*'('*/ ){
				iNest++;
			}else if( pCur->nType & PH7_TK_RPAREN /*')'*/ ){
				/* Don't worry about mismatched parenthesis here,the expression 
				 * parser will shortly detect any syntax error.
				 */
				iNest--;
			}
			pCur++;
		}
		rc = SXERR_EMPTY;
		if( pCur < pGen->pIn ){
			if( &pCur[1] >= pGen->pIn ){
				/* Missing value */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pCur->nLine,"array(): Missing entry value");
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				return SXRET_OK;
			}
			/* Compile the expression holding the key */
			rc = GenStateCompileArrayEntry(&(*pGen),pKey,pCur,
				EXPR_FLAG_RDONLY_LOAD/*Do not create the variable if inexistant*/,0);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			pCur++; /* Jump the '=>' operator */
		}else if( pKey == pCur ){
			/* Key is omitted,emit a warning */
			PH7_GenCompileError(&(*pGen),E_WARNING,pCur->nLine,"array(): Missing entry key");
			pCur++; /* Jump the '=>' operator */
		}else{
			/* Reset back the cursor and point to the entry value */
			pCur = pKey;
		}
		if( rc == SXERR_EMPTY ){
			/* No available key,load NULL */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0 /* nil index */,0,0);
		}
		if( pCur->nType & PH7_TK_AMPER /*'&'*/){
			/* Insertion by reference, [i.e: $a = array(&$x);] */
			xValidator = GenStateArrayNodeValidator; /* Only variable are allowed */
			iEmitRef = 1;
			pCur++; /* Jump the '&' token */
			if( pCur >= pGen->pIn ){
				/* Missing value */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pCur->nLine,"array(): Missing referenced variable");
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				return SXRET_OK;
			}
		}
		/* Compile indice value */
		rc = GenStateCompileArrayEntry(&(*pGen),pCur,pGen->pIn,EXPR_FLAG_RDONLY_LOAD/*Do not create the variable if inexistant*/,xValidator);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		if( iEmitRef ){
			/* Emit the load reference instruction */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD_REF,0,0,0,0);
		}
		xValidator = 0;
		iEmitRef = 0;
		nPair++;
	}
	/* Emit the load map instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD_MAP,nPair * 2,0,0,0);
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Expression tree validator callback for the 'list' language construct.
 * Return SXRET_OK if the tree is valid. Any other return value indicates
 * an invalid expression tree and this function will generate the appropriate
 * error message.
 * See the routine responible of compiling the list language construct
 * for more inforation.
 */
static sxi32 GenStateListNodeValidator(ph7_gen_state *pGen,ph7_expr_node *pRoot)
{
	sxi32 rc = SXRET_OK;
	if( pRoot->pOp ){
		if( pRoot->pOp->iOp != EXPR_OP_SUBSCRIPT /* $a[] */ && pRoot->pOp->iOp != EXPR_OP_ARROW /* -> */
			&& pRoot->pOp->iOp != EXPR_OP_DC /* :: */ ){
				/* Unexpected expression */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
					"list(): Expecting a variable not an expression");
				if( rc != SXERR_ABORT ){
					rc = SXERR_INVALID;
				}
		}
	}else if( pRoot->xCode != PH7_CompileVariable ){
		/* Unexpected expression */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
			"list(): Expecting a variable not an expression");
		if( rc != SXERR_ABORT ){
			rc = SXERR_INVALID;
		}
	}
	return rc;
}
/*
 * Compile the 'list' language construct.
 *  According to the PHP language reference
 *  list(): Assign variables as if they were an array.
 *  list() is used to assign a list of variables in one operation.
 *  Description
 *   array list (mixed $varname [, mixed $... ] )
 *   Like array(), this is not really a function, but a language construct. 
 *   list() is used to assign a list of variables in one operation.
 *  Parameters
 *   $varname: A variable.
 *  Return Values
 *   The assigned array.
 */
PH7_PRIVATE sxi32 PH7_CompileList(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	SyToken *pNext;
	sxi32 nExpr;
	sxi32 rc;
	nExpr = 0;
	/* Jump the 'list' keyword,the leading left parenthesis and the trailing parenthesis */
	pGen->pIn += 2;
	pGen->pEnd--;
	SXUNUSED(iCompileFlag); /* cc warning */
	while( SXRET_OK == PH7_GetNextExpr(pGen->pIn,pGen->pEnd,&pNext) ){
		if( pGen->pIn < pNext ){
			/* Compile the expression holding the variable */
			rc = GenStateCompileArrayEntry(&(*pGen),pGen->pIn,pNext,EXPR_FLAG_LOAD_IDX_STORE,GenStateListNodeValidator);
			if( rc != SXRET_OK ){
				/* Do not bother compiling this expression, it's broken anyway */
				return SXRET_OK;
			}
		}else{
			/* Empty entry,load NULL */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0/* NULL index */,0,0);
		}
		nExpr++;
		/* Advance the stream cursor */
		pGen->pIn = &pNext[1];
	}
	/* Emit the LOAD_LIST instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD_LIST,nExpr,0,0,0);
	/* Node successfully compiled */
	return SXRET_OK;
}
/* Forward declaration */
static sxi32 GenStateCompileFunc(ph7_gen_state *pGen,SyString *pName,sxi32 iFlags,int bHandleClosure,ph7_vm_func **ppFunc);
/*
 * Compile an annoynmous function or a closure.
 * According to the PHP language reference
 *  Anonymous functions, also known as closures, allow the creation of functions
 *  which have no specified name. They are most useful as the value of callback
 *  parameters, but they have many other uses. Closures can also be used as
 *  the values of variables; Assigning a closure to a variable uses the same
 *  syntax as any other assignment, including the trailing semicolon:
 *  Example Anonymous function variable assignment example
 * <?php
 * $greet = function($name)
 * {
 *    printf("Hello %s\r\n", $name);
 * };
 * $greet('World');
 * $greet('PHP');
 * ?>
 * Note that the implementation of annoynmous function and closure under
 * PH7 is completely different from the one used by the zend engine.
 */
PH7_PRIVATE sxi32 PH7_CompileAnnonFunc(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	ph7_vm_func *pAnnonFunc; /* Annonymous function body */
	char zName[512];         /* Unique lambda name */
	static int iCnt = 1;     /* There is no worry about thread-safety here,because only
							  * one thread is allowed to compile the script.
						      */
	ph7_value *pObj;
	SyString sName;
	sxu32 nIdx;
	sxu32 nLen;
	sxi32 rc;

	pGen->pIn++; /* Jump the 'function' keyword */
	if( pGen->pIn->nType & (PH7_TK_ID|PH7_TK_KEYWORD) ){
		pGen->pIn++;
	}
	/* Reserve a constant for the lambda */
	pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
	if( pObj == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,1,"Fatal, PH7 engine is running out of memory");
		SXUNUSED(iCompileFlag); /* cc warning */
		return SXERR_ABORT;
	}
	/* Generate a unique name */
	nLen = SyBufferFormat(zName,sizeof(zName),"[lambda_%d]",iCnt++);
	/* Make sure the generated name is unique */
	while( SyHashGet(&pGen->pVm->hFunction,zName,nLen) != 0 && nLen < sizeof(zName) - 2 ){
		nLen = SyBufferFormat(zName,sizeof(zName),"[lambda_%d]",iCnt++);
	}
	SyStringInitFromBuf(&sName,zName,nLen);
	PH7_MemObjInitFromString(pGen->pVm,pObj,&sName);
	/* Compile the lambda body */
	rc = GenStateCompileFunc(&(*pGen),&sName,0,TRUE,&pAnnonFunc);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	if( pAnnonFunc->iFlags & VM_FUNC_CLOSURE ){
		/* Emit the load closure instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD_CLOSURE,0,0,pAnnonFunc,0);
	}else{
		/* Emit the load constant instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
	}
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Compile a backtick quoted string.
 */
static sxi32 PH7_CompileBacktic(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	/* TICKET 1433-40: This construct is disabled in the current release of the PH7 engine.
	 * If you want this feature,please contact symisc systems via contact@symisc.net
	 */
	PH7_GenCompileError(&(*pGen),E_NOTICE,pGen->pIn->nLine,
		"Command line invocation is disabled in the current release of the PH7(%s) engine",
		ph7_lib_version()
		);
	/* Load NULL */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
	SXUNUSED(iCompileFlag); /* cc warning */
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Compile a function [i.e: die(),exit(),include(),...] which is a langauge
 * construct.
 */
PH7_PRIVATE sxi32 PH7_CompileLangConstruct(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	SyString *pName;
	sxu32 nKeyID;
	sxi32 rc;
	/* Name of the language construct [i.e: echo,die...]*/
	pName = &pGen->pIn->sData;
	nKeyID = (sxu32)SX_PTR_TO_INT(pGen->pIn->pUserData);
	pGen->pIn++; /* Jump the language construct keyword */
	if( nKeyID == PH7_TKWRD_ECHO ){
		SyToken *pTmp,*pNext = 0;
		/* Compile arguments one after one */
		pTmp = pGen->pEnd;
		/* Symisc eXtension to the PHP programming language: 
		 * 'echo' can be used in the context of a function which
		 *  mean that the following expression is valid:
		 *      fopen('file.txt','r') or echo "IO error";
		 */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,1 /* Boolean true index */,0,0);
		while( SXRET_OK == PH7_GetNextExpr(pGen->pIn,pTmp,&pNext) ){
			if( pGen->pIn < pNext ){
				pGen->pEnd = pNext;
				rc = PH7_CompileExpr(&(*pGen),EXPR_FLAG_RDONLY_LOAD/* Do not create variable if inexistant */,0);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				if( rc != SXERR_EMPTY ){
					/* Ticket 1433-008: Optimization #1: Consume input directly 
					 * without the overhead of a function call.
					 * This is a very powerful optimization that improve
					 * performance greatly.
					 */
					PH7_VmEmitInstr(pGen->pVm,PH7_OP_CONSUME,1,0,0,0);
				}
			}
			/* Jump trailing commas */
			while( pNext < pTmp && (pNext->nType & PH7_TK_COMMA) ){
				pNext++;
			}
			pGen->pIn = pNext;
		}
		/* Restore token stream */
		pGen->pEnd = pTmp;	
	}else{
		sxi32 nArg = 0;
		sxu32 nIdx = 0;
		rc = PH7_CompileExpr(&(*pGen),EXPR_FLAG_RDONLY_LOAD/* Do not create variable if inexistant */,0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}else if(rc != SXERR_EMPTY ){
			nArg = 1;
		}
		if( SXRET_OK != GenStateFindLiteral(&(*pGen),pName,&nIdx) ){
			ph7_value *pObj;
			/* Emit the call instruction */
			pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
			if( pObj == 0 ){
				PH7_GenCompileError(&(*pGen),E_ERROR,1,"Fatal, PH7 engine is running out of memory");
				SXUNUSED(iCompileFlag); /* cc warning */
				return SXERR_ABORT;
			}
			PH7_MemObjInitFromString(pGen->pVm,pObj,pName);
			/* Install in the literal table */
			GenStateInstallLiteral(&(*pGen),pObj,nIdx);
		}
		/* Emit the call instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_CALL,nArg,0,0,0);
	}
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Compile a node holding a variable declaration.
 * According to the PHP language reference
 *  Variables in PHP are represented by a dollar sign followed by the name of the variable.
 *  The variable name is case-sensitive.
 *  Variable names follow the same rules as other labels in PHP. A valid variable name starts
 *  with a letter or underscore, followed by any number of letters, numbers, or underscores.
 *  As a regular expression, it would be expressed thus: '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*'
 *  Note: For our purposes here, a letter is a-z, A-Z, and the bytes from 127 through 255 (0x7f-0xff). 
 *  Note: $this is a special variable that can't be assigned. 
 *  By default, variables are always assigned by value. That is to say, when you assign an expression
 *  to a variable, the entire value of the original expression is copied into the destination variable.
 *  This means, for instance, that after assigning one variable's value to another, changing one of those
 *  variables will have no effect on the other. For more information on this kind of assignment, see
 *  the chapter on Expressions.
 *  PHP also offers another way to assign values to variables: assign by reference. This means that
 *  the new variable simply references (in other words, "becomes an alias for" or "points to") the original
 *  variable. Changes to the new variable affect the original, and vice versa.
 *  To assign by reference, simply prepend an ampersand (&) to the beginning of the variable which
 *  is being assigned (the source variable).
 */
PH7_PRIVATE sxi32 PH7_CompileVariable(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	sxu32 nLine = pGen->pIn->nLine;
	sxi32 iVv;
	sxi32 iP1;
	void *p3;
	sxi32 rc;
	iVv = -1; /* Variable variable counter */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_DOLLAR) ){
		pGen->pIn++;
		iVv++;
	}
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_ID|PH7_TK_KEYWORD|PH7_TK_OCB/*'{'*/)) == 0 ){
		/* Invalid variable name */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Invalid variable name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	p3  = 0;
	if( pGen->pIn->nType & PH7_TK_OCB/*'{'*/ ){
		/* Dynamic variable creation */
		pGen->pIn++;  /* Jump the open curly */
		pGen->pEnd--; /* Ignore the trailing curly */
		if( pGen->pIn >= pGen->pEnd ){
			/* Empty expression */
			PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Invalid variable name");
			return SXRET_OK;
		}
		/* Compile the expression holding the variable name */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}else if( rc == SXERR_EMPTY ){
			PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Missing variable name");
			return SXRET_OK;
		}
	}else{
		SyHashEntry *pEntry;
		SyString *pName;
		char *zName = 0;
		/* Extract variable name */
		pName = &pGen->pIn->sData;
		/* Advance the stream cursor */
		pGen->pIn++;
		pEntry = SyHashGet(&pGen->hVar,(const void *)pName->zString,pName->nByte);
		if( pEntry == 0 ){
			/* Duplicate name */
			zName = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
			if( zName == 0 ){
				PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 engine is running out of memory");
				return SXERR_ABORT;
			}
			/* Install in the hashtable */
			SyHashInsert(&pGen->hVar,zName,pName->nByte,zName);
		}else{
			/* Name already available */
			zName = (char *)pEntry->pUserData;
		}
		p3 = (void *)zName;
	}
	iP1 = 0;
	if( iCompileFlag & EXPR_FLAG_RDONLY_LOAD ){
		if( (iCompileFlag & EXPR_FLAG_LOAD_IDX_STORE) == 0 ){
			/* Read-only load.In other words do not create the variable if inexistant */
			iP1 = 1;
		}
	}
	/* Emit the load instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD,iP1,0,p3,0);
	while( iVv > 0 ){
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD,iP1,0,0,0);
		iVv--;
	}
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Load a literal.
 */
static sxi32 GenStateLoadLiteral(ph7_gen_state *pGen)
{
	SyToken *pToken = pGen->pIn;
	ph7_value *pObj;
	SyString *pStr;	
	sxu32 nIdx;
	/* Extract token value */
	pStr = &pToken->sData;
	/* Deal with the reserved literals [i.e: null,false,true,...] first */
	if( pStr->nByte == sizeof("NULL") - 1 ){
		if( SyStrnicmp(pStr->zString,"null",sizeof("NULL")-1) == 0 ){
			/* NULL constant are always indexed at 0 */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
			return SXRET_OK;
		}else if( SyStrnicmp(pStr->zString,"true",sizeof("TRUE")-1) == 0 ){
			/* TRUE constant are always indexed at 1 */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,1,0,0);
			return SXRET_OK;
		}
	}else if (pStr->nByte == sizeof("FALSE") - 1 &&
		SyStrnicmp(pStr->zString,"false",sizeof("FALSE")-1) == 0 ){
			/* FALSE constant are always indexed at 2 */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,2,0,0);
			return SXRET_OK;
	}else if(pStr->nByte == sizeof("__LINE__") - 1 &&
		SyMemcmp(pStr->zString,"__LINE__",sizeof("__LINE__")-1) == 0 ){
			/* TICKET 1433-004: __LINE__ constant must be resolved at compile time,not run time */
			pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
			if( pObj == 0 ){
				PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,"Fatal, PH7 engine is running out of memory");
				return SXERR_ABORT;
			}
			PH7_MemObjInitFromInt(pGen->pVm,pObj,pToken->nLine);
			/* Emit the load constant instruction */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
			return SXRET_OK;
	}else if( (pStr->nByte == sizeof("__FUNCTION__") - 1 &&
		SyMemcmp(pStr->zString,"__FUNCTION__",sizeof("__FUNCTION__")-1) == 0) ||
		(pStr->nByte == sizeof("__METHOD__") - 1 && 
		SyMemcmp(pStr->zString,"__METHOD__",sizeof("__METHOD__")-1) == 0) ){
			GenBlock *pBlock = pGen->pCurrent;
			/* TICKET 1433-004: __FUNCTION__/__METHOD__ constants must be resolved at compile time,not run time */
			while( pBlock && (pBlock->iFlags & GEN_BLOCK_FUNC) == 0 ){
				/* Point to the upper block */
				pBlock = pBlock->pParent;
			}
			if( pBlock == 0 ){
				/* Called in the global scope,load NULL */
				PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
			}else{
				/* Extract the target function/method */
				ph7_vm_func *pFunc = (ph7_vm_func *)pBlock->pUserData;
				if( pStr->zString[2] == 'M' /* METHOD */ && (pFunc->iFlags & VM_FUNC_CLASS_METHOD) == 0 ){
					/* Not a class method,Load null */
					PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,0,0,0);
				}else{
					pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
					if( pObj == 0 ){
						PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,"Fatal, PH7 engine is running out of memory");
						return SXERR_ABORT;
					}
					PH7_MemObjInitFromString(pGen->pVm,pObj,&pFunc->sName);
					/* Emit the load constant instruction */
					PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nIdx,0,0);
				}
			}
			return SXRET_OK;
	}
	/* Query literal table */
	if( SXRET_OK != GenStateFindLiteral(&(*pGen),&pToken->sData,&nIdx) ){
		ph7_value *pObj;
		/* Unknown literal,install it in the literal table */
		pObj = PH7_ReserveConstObj(pGen->pVm,&nIdx);
		if( pObj == 0 ){
			PH7_GenCompileError(&(*pGen),E_ERROR,1,"PH7 engine is running out of memory");
			return SXERR_ABORT;
		}
		PH7_MemObjInitFromString(pGen->pVm,pObj,&pToken->sData);
		GenStateInstallLiteral(&(*pGen),pObj,nIdx);
	}
	/* Emit the load constant instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,1,nIdx,0,0);
	return SXRET_OK;
}
/*
 * Resolve a namespace path or simply load a literal:
 * As of this version namespace support is disabled. If you need
 * a working version that implement namespace,please contact
 * symisc systems via contact@symisc.net
 */
static sxi32 GenStateResolveNamespaceLiteral(ph7_gen_state *pGen)
{
	int emit = 0;
	sxi32 rc;
	while( pGen->pIn < &pGen->pEnd[-1] ){
		/* Emit a warning */
		if( !emit ){
			PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn->nLine,
				"Namespace support is disabled in the current release of the PH7(%s) engine",
				ph7_lib_version()
				);
			emit = 1;
		}
		pGen->pIn++; /* Ignore the token */
	}
	/* Load literal */
	rc = GenStateLoadLiteral(&(*pGen));	
	return rc;
}
/*
 * Compile a literal which is an identifier(name) for a simple value.
 */
PH7_PRIVATE sxi32 PH7_CompileLiteral(ph7_gen_state *pGen,sxi32 iCompileFlag)
{
	sxi32 rc;
	rc = GenStateResolveNamespaceLiteral(&(*pGen));
	if( rc != SXRET_OK ){
		SXUNUSED(iCompileFlag); /* cc warning */
		return rc;
	}
	/* Node successfully compiled */
	return SXRET_OK;
}
/*
 * Recover from a compile-time error. In other words synchronize
 * the token stream cursor with the first semi-colon seen.
 */
static sxi32 PH7_ErrorRecover(ph7_gen_state *pGen)
{
	/* Synchronize with the next-semi-colon and avoid compiling this erroneous statement */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI /*';'*/) == 0){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Check if the given identifier name is reserved or not.
 * Return TRUE if reserved.FALSE otherwise.
 */
static int GenStateIsReservedConstant(SyString *pName)
{
	if( pName->nByte == sizeof("null") - 1 ){
		if( SyStrnicmp(pName->zString,"null",sizeof("null")-1) == 0 ){
			return TRUE;
		}else if( SyStrnicmp(pName->zString,"true",sizeof("true")-1) == 0 ){
			return TRUE;
		}
	}else if( pName->nByte == sizeof("false") - 1 ){
		if( SyStrnicmp(pName->zString,"false",sizeof("false")-1) == 0 ){
			return TRUE;
		}
	}
	/* Not a reserved constant */
	return FALSE;
}
/*
 * Compile the 'const' statement.
 * According to the PHP language reference
 *  A constant is an identifier (name) for a simple value. As the name suggests, that value
 *  cannot change during the execution of the script (except for magic constants, which aren't actually constants).
 *  A constant is case-sensitive by default. By convention, constant identifiers are always uppercase.
 *  The name of a constant follows the same rules as any label in PHP. A valid constant name starts
 *  with a letter or underscore, followed by any number of letters, numbers, or underscores.
 *  As a regular expression it would be expressed thusly: [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]* 
 *  Syntax
 *  You can define a constant by using the define()-function or by using the const keyword outside
 *  a class definition. Once a constant is defined, it can never be changed or undefined.
 *  You can get the value of a constant by simply specifying its name. Unlike with variables
 *  you should not prepend a constant with a $. You can also use the function constant() to read
 *  a constant's value if you wish to obtain the constant's name dynamically. Use get_defined_constants()
 *  to get a list of all defined constants.
 * 
 * Symisc eXtension.
 *  PH7 allow any complex expression to be associated with the constant while the zend engine
 *  would allow only simple scalar value.
 *  Example
 *    const HELLO = "Welcome "." guest ".rand_str(3); //Valid under PH7/Generate error using the zend engine
 *    Refer to the official documentation for more information on this feature.
 */
static sxi32 PH7_CompileConstant(ph7_gen_state *pGen)
{
	SySet *pConsCode,*pInstrContainer;
	sxu32 nLine = pGen->pIn->nLine;
	SyString *pName;
	sxi32 rc;
	pGen->pIn++; /* Jump the 'const' keyword */
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_SSTR|PH7_TK_DSTR|PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
		/* Invalid constant name */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"const: Invalid constant name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Peek constant name */
	pName = &pGen->pIn->sData;
	/* Make sure the constant name isn't reserved */
	if( GenStateIsReservedConstant(pName) ){
		/* Reserved constant */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"const: Cannot redeclare a reserved constant '%z'",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	pGen->pIn++;
	if(pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_EQUAL /* '=' */) == 0 ){
		/* Invalid statement*/
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"const: Expected '=' after constant name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	pGen->pIn++; /*Jump the equal sign */
	/* Allocate a new constant value container */
	pConsCode = (SySet *)SyMemBackendPoolAlloc(&pGen->pVm->sAllocator,sizeof(SySet));
	if( pConsCode == 0 ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 engine is running out of memory");
		return SXERR_ABORT;
	}
	SySetInit(pConsCode,&pGen->pVm->sAllocator,sizeof(VmInstr));
	/* Swap bytecode container */
	pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
	PH7_VmSetByteCodeContainer(pGen->pVm,pConsCode);
	/* Compile constant value */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	/* Emit the done instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,(rc != SXERR_EMPTY ? 1 : 0),0,0,0);
	PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer); 
	if( rc == SXERR_ABORT ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_ABORT;
	}
	SySetSetUserData(pConsCode,pGen->pVm);
	/* Register the constant */
	rc = PH7_VmRegisterConstant(pGen->pVm,pName,PH7_VmExpandConstantValue,pConsCode);
	if( rc != SXRET_OK ){
		SySetRelease(pConsCode);
		SyMemBackendPoolFree(&pGen->pVm->sAllocator,pConsCode);
	}
	return SXRET_OK;
Synchronize:
	/* Synchronize with the next-semi-colon and avoid compiling this erroneous statement */
	while(pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the 'continue' statement.
 * According to the PHP language reference
 *  continue is used within looping structures to skip the rest of the current loop iteration
 *  and continue execution at the condition evaluation and then the beginning of the next
 *  iteration.
 *  Note: Note that in PHP the switch statement is considered a looping structure for
 *  the purposes of continue. 
 *  continue accepts an optional numeric argument which tells it how many levels
 *  of enclosing loops it should skip to the end of.
 *  Note:
 *   continue 0; and continue 1; is the same as running continue;. 
 */
static sxi32 PH7_CompileContinue(ph7_gen_state *pGen)
{
	GenBlock *pLoop; /* Target loop */
	sxi32 iLevel;    /* How many nesting loop to skip */
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	iLevel = 0;
	/* Jump the 'continue' keyword */
	pGen->pIn++;
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_NUM) ){
		/* optional numeric argument which tells us how many levels
		 * of enclosing loops we should skip to the end of. 
		 */
		iLevel = (sxi32)PH7_TokenValueToInt64(&pGen->pIn->sData);
		if( iLevel < 2 ){
			iLevel = 0;
		}
		pGen->pIn++; /* Jump the optional numeric argument */
	}
	/* Point to the target loop */
	pLoop = GenStateFetchBlock(pGen->pCurrent,GEN_BLOCK_LOOP,iLevel);
	if( pLoop == 0 ){
		/* Illegal continue */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"A 'continue' statement may only be used within a loop or switch");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
	}else{
		sxu32 nInstrIdx = 0;
		if( pLoop->iFlags & GEN_BLOCK_SWITCH ){
			/* According to the PHP language reference manual
			 *  Note that unlike some other languages, the continue statement applies to switch 
			 *  and acts similar to break. If you have a switch inside a loop and wish to continue
			 *  to the next iteration of the outer loop, use continue 2. 
			 */
			rc = PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,0,0,&nInstrIdx);
			if( rc == SXRET_OK ){
				GenStateNewJumpFixup(pLoop,PH7_OP_JMP,nInstrIdx);
			}
		}else{
			/* Emit the unconditional jump to the beginning of the target loop */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,pLoop->nFirstInstr,0,&nInstrIdx);
			if( pLoop->bPostContinue == TRUE ){
				JumpFixup sJumpFix;
				/* Post-continue */
				sJumpFix.nJumpType = PH7_OP_JMP;
				sJumpFix.nInstrIdx = nInstrIdx;
				SySetPut(&pLoop->aPostContFix,(const void *)&sJumpFix);
			}
		}
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		/* Not so fatal,emit a warning only */
		PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn->nLine,"Expected semi-colon ';' after 'continue' statement");
	}
	/* Statement successfully compiled */
	return SXRET_OK;
}
/*
 * Compile the 'break' statement.
 * According to the PHP language reference
 *  break ends execution of the current for, foreach, while, do-while or switch
 *  structure.
 *  break accepts an optional numeric argument which tells it how many nested
 *  enclosing structures are to be broken out of. 
 */
static sxi32 PH7_CompileBreak(ph7_gen_state *pGen)
{
	GenBlock *pLoop; /* Target loop */
	sxi32 iLevel;    /* How many nesting loop to skip */
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	iLevel = 0;
	/* Jump the 'break' keyword */
	pGen->pIn++;
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_NUM) ){
		/* optional numeric argument which tells us how many levels
		 * of enclosing loops we should skip to the end of. 
		 */
		iLevel = (sxi32)PH7_TokenValueToInt64(&pGen->pIn->sData);
		if( iLevel < 2 ){
			iLevel = 0;
		}
		pGen->pIn++; /* Jump the optional numeric argument */
	}
	/* Extract the target loop */
	pLoop = GenStateFetchBlock(pGen->pCurrent,GEN_BLOCK_LOOP,iLevel);
	if( pLoop == 0 ){
		/* Illegal break */
		rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"A 'break' statement may only be used within a loop or switch");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
	}else{
		sxu32 nInstrIdx; 
		rc = PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,0,0,&nInstrIdx);
		if( rc == SXRET_OK ){
			/* Fix the jump later when the jump destination is resolved */
			GenStateNewJumpFixup(pLoop,PH7_OP_JMP,nInstrIdx);
		}
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		/* Not so fatal,emit a warning only */
		PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn->nLine,"Expected semi-colon ';' after 'break' statement");
	}
	/* Statement successfully compiled */
	return SXRET_OK;
}
/*
 * Compile or record a label.
 *  A label is a target point that is specified by an identifier followed by a colon.
 * Example
 *  goto LABEL;
 *   echo 'Foo';
 *  LABEL:
 *   echo 'Bar';
 */
static sxi32 PH7_CompileLabel(ph7_gen_state *pGen)
{
	GenBlock *pBlock;
	Label sLabel;
	/* Make sure the label does not occur inside a loop or a try{}catch(); block */
	pBlock = GenStateFetchBlock(pGen->pCurrent,GEN_BLOCK_LOOP|GEN_BLOCK_EXCEPTION,0);
	if( pBlock ){
		sxi32 rc;
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,
			"Label '%z' inside loop or try/catch block is disallowed",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}else{
		SyString *pTarget = &pGen->pIn->sData;
		char *zDup;
		/* Initialize label fields */
		sLabel.nJumpDest = PH7_VmInstrLength(pGen->pVm);
		/* Duplicate label name */
		zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pTarget->zString,pTarget->nByte);
		if( zDup == 0 ){
			PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Fatal, PH7 is running out of memory");
			return SXERR_ABORT;
		}
		SyStringInitFromBuf(&sLabel.sName,zDup,pTarget->nByte);
		sLabel.bRef  = FALSE;
		sLabel.nLine = pGen->pIn->nLine;
		pBlock = pGen->pCurrent;
		while( pBlock ){
			if( pBlock->iFlags & (GEN_BLOCK_FUNC|GEN_BLOCK_EXCEPTION) ){
				break;
			}
			/* Point to the upper block */
			pBlock = pBlock->pParent;
		}
		if( pBlock ){
			sLabel.pFunc = (ph7_vm_func *)pBlock->pUserData;
		}else{
			sLabel.pFunc = 0;
		}
		/* Insert in label set */
		SySetPut(&pGen->aLabel,(const void *)&sLabel);
	}
	pGen->pIn += 2; /* Jump the label name and the semi-colon*/
	return SXRET_OK;
}
/*
 * Compile the so hated 'goto' statement.
 * You've probably been taught that gotos are bad, but this sort
 * of rewriting  happens all the time, in fact every time you run
 * a compiler it has to do this.
 * According to the PHP language reference manual
 *   The goto operator can be used to jump to another section in the program.
 *   The target point is specified by a label followed by a colon, and the instruction
 *   is given as goto followed by the desired target label. This is not a full unrestricted goto.
 *   The target label must be within the same file and context, meaning that you cannot jump out
 *   of a function or method, nor can you jump into one. You also cannot jump into any sort of loop
 *   or switch structure. You may jump out of these, and a common use is to use a goto in place 
 *   of a multi-level break
 */
static sxi32 PH7_CompileGoto(ph7_gen_state *pGen)
{
	JumpFixup sJump;
	sxi32 rc;
	pGen->pIn++; /* Jump the 'goto' keyword */
	if( pGen->pIn >= pGen->pEnd ){
		/* Missing label */
		rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"goto: expecting a 'label_name'");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	if( (pGen->pIn->nType & (PH7_TK_KEYWORD|PH7_TK_ID)) == 0 ){
		rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"goto: Invalid label name: '%z'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
	}else{
		SyString *pTarget = &pGen->pIn->sData;
		GenBlock *pBlock;
		char *zDup;
		/* Prepare the jump destination */
		sJump.nJumpType = PH7_OP_JMP;
		sJump.nLine = pGen->pIn->nLine;
		/* Duplicate label name */
		zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pTarget->zString,pTarget->nByte);
		if( zDup == 0 ){
			PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Fatal, PH7 is running out of memory");
			return SXERR_ABORT;
		}
		SyStringInitFromBuf(&sJump.sLabel,zDup,pTarget->nByte);
		pBlock = pGen->pCurrent;
		while( pBlock ){
			if( pBlock->iFlags & (GEN_BLOCK_FUNC|GEN_BLOCK_EXCEPTION) ){
				break;
			}
			/* Point to the upper block */
			pBlock = pBlock->pParent;
		}
		if( pBlock && pBlock->iFlags & GEN_BLOCK_EXCEPTION ){
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"goto inside try/catch block is disallowed");
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
		}
		if( pBlock && (pBlock->iFlags & GEN_BLOCK_FUNC)){
			sJump.pFunc = (ph7_vm_func *)pBlock->pUserData;
		}else{
			sJump.pFunc = 0;
		}
		/* Emit the unconditional jump */
		if( SXRET_OK == PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,0,0,&sJump.nInstrIdx) ){
			SySetPut(&pGen->aGoto,(const void *)&sJump);
		}
	}
	pGen->pIn++; /* Jump the label name */
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Expected semi-colon ';' after 'goto' statement");
	}
	/* Statement successfully compiled */
	return SXRET_OK;
}
/*
 * Point to the next PHP chunk that will be processed shortly.
 * Return SXRET_OK on success. Any other return value indicates
 * failure.
 */
static sxi32 GenStateNextChunk(ph7_gen_state *pGen)
{
	ph7_value *pRawObj; /* Raw chunk [i.e: HTML,XML...] */
	sxu32 nRawObj;   
	sxu32 nObjIdx;
	/* Consume raw chunks verbatim without any processing until we get
	 * a PHP block.
	 */
Consume:
	nRawObj = nObjIdx = 0;
	while( pGen->pRawIn < pGen->pRawEnd && pGen->pRawIn->nType != PH7_TOKEN_PHP ){
		pRawObj = PH7_ReserveConstObj(pGen->pVm,&nObjIdx);
		if( pRawObj == 0 ){
			PH7_GenCompileError(pGen,E_ERROR,1,"Fatal, PH7 engine is running out of memory");
			return SXERR_ABORT;
		}
		/* Mark as constant and emit the load constant instruction */
		PH7_MemObjInitFromString(pGen->pVm,pRawObj,&pGen->pRawIn->sData);
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOADC,0,nObjIdx,0,0);
		++nRawObj;
		pGen->pRawIn++; /* Next chunk */
	}
	if( nRawObj > 0 ){
		/* Emit the consume instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_CONSUME,nRawObj,0,0,0);
	}
	if( pGen->pRawIn < pGen->pRawEnd ){
		SySet *pTokenSet = pGen->pTokenSet;
		/* Reset the token set */
		SySetReset(pTokenSet);
		/* Tokenize input */
		PH7_TokenizePHP(SyStringData(&pGen->pRawIn->sData),SyStringLength(&pGen->pRawIn->sData),
			pGen->pRawIn->nLine,pTokenSet);
		/* Point to the fresh token stream */
		pGen->pIn  = (SyToken *)SySetBasePtr(pTokenSet);
		pGen->pEnd = &pGen->pIn[SySetUsed(pTokenSet)];
		/* Advance the stream cursor */
		pGen->pRawIn++;
		/* TICKET 1433-011 */
		if( pGen->pIn < pGen->pEnd && ( pGen->pIn->nType & PH7_TK_EQUAL ) ){
			static const sxu32 nKeyID = PH7_TKWRD_ECHO;
			sxi32 rc;
			/* Refer to TICKET 1433-009  */
			pGen->pIn->nType = PH7_TK_KEYWORD;
			pGen->pIn->pUserData = SX_INT_TO_PTR(nKeyID);
			SyStringInitFromBuf(&pGen->pIn->sData,"echo",sizeof("echo")-1);
			rc = PH7_CompileExpr(pGen,0,0);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}else if( rc != SXERR_EMPTY ){
				PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
			}
			goto Consume;
		}
	}else{
		/* No more chunks to process */
		pGen->pIn = pGen->pEnd;
		return SXERR_EOF;
	}
	return SXRET_OK;
}
/*
 * Compile a PHP block.
 * A block is simply one or more PHP statements and expressions to compile
 * optionally delimited by braces {}.
 * Return SXRET_OK on success. Any other return value indicates failure
 * and this function takes care of generating the appropriate error
 * message.
 */
static sxi32 PH7_CompileBlock(
	ph7_gen_state *pGen, /* Code generator state */
	sxi32 nKeywordEnd    /* EOF-keyword [i.e: endif;endfor;...]. 0 (zero) otherwise */
	)
{
	sxi32 rc;
	if( pGen->pIn->nType & PH7_TK_OCB /* '{' */ ){
		sxu32 nLine = pGen->pIn->nLine;
		rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_STD,PH7_VmInstrLength(pGen->pVm),0,0);
		if( rc != SXRET_OK ){
			return SXERR_ABORT;
		}
		pGen->pIn++;
		/* Compile until we hit the closing braces '}' */
		for(;;){
			if( pGen->pIn >= pGen->pEnd ){
				rc = GenStateNextChunk(&(*pGen));
				if (rc == SXERR_ABORT ){
			 	   return SXERR_ABORT;
				}
				if( rc == SXERR_EOF ){
					/* No more token to process. Missing closing braces */
					PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Missing closing braces '}'");
					break;
				}
			}
			if( pGen->pIn->nType & PH7_TK_CCB/*'}'*/ ){
				/* Closing braces found,break immediately*/
				pGen->pIn++;
				break;
			}
			/* Compile a single statement */
			rc = GenStateCompileChunk(&(*pGen),PH7_COMPILE_SINGLE_STMT);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		GenStateLeaveBlock(&(*pGen),0);		
	}else if( (pGen->pIn->nType & PH7_TK_COLON /* ':' */) && nKeywordEnd > 0 ){
		pGen->pIn++;
		rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_STD,PH7_VmInstrLength(pGen->pVm),0,0);
		if( rc != SXRET_OK ){
			return SXERR_ABORT;
		}
		/* Compile until we hit the EOF-keyword [i.e: endif;endfor;...] */
		for(;;){
			if( pGen->pIn >= pGen->pEnd ){
				rc = GenStateNextChunk(&(*pGen));
				if (rc == SXERR_ABORT ){
			 	   return SXERR_ABORT;
				}
				if( rc == SXERR_EOF || pGen->pIn >= pGen->pEnd ){
					/* No more token to process */
					if( rc == SXERR_EOF ){
						PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pEnd[-1].nLine,
							"Missing 'endfor;','endwhile;','endswitch;' or 'endforeach;' keyword");
					}
					break;
				}
			}
			if( pGen->pIn->nType & PH7_TK_KEYWORD ){
				sxi32 nKwrd; 
				/* Keyword found */
				nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
				if( nKwrd == nKeywordEnd ||
					(nKeywordEnd == PH7_TKWRD_ENDIF && (nKwrd == PH7_TKWRD_ELSE || nKwrd == PH7_TKWRD_ELIF)) ){
						/* Delimiter keyword found,break */
						if( nKwrd != PH7_TKWRD_ELSE && nKwrd != PH7_TKWRD_ELIF ){
							pGen->pIn++; /*  endif;endswitch... */
						}
						break;
				}
			}
			/* Compile a single statement */
			rc = GenStateCompileChunk(&(*pGen),PH7_COMPILE_SINGLE_STMT);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		GenStateLeaveBlock(&(*pGen),0);	
	}else{
		/* Compile a single statement */
		rc = GenStateCompileChunk(&(*pGen),PH7_COMPILE_SINGLE_STMT);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* Jump trailing semi-colons ';' */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the gentle 'while' statement.
 * According to the PHP language reference
 *  while loops are the simplest type of loop in PHP.They behave just like their C counterparts.
 *  The basic form of a while statement is:
 *  while (expr)
 *   statement
 *  The meaning of a while statement is simple. It tells PHP to execute the nested statement(s)
 *  repeatedly, as long as the while expression evaluates to TRUE. The value of the expression
 *  is checked each time at the beginning of the loop, so even if this value changes during
 *  the execution of the nested statement(s), execution will not stop until the end of the iteration
 *  (each time PHP runs the statements in the loop is one iteration). Sometimes, if the while
 *  expression evaluates to FALSE from the very beginning, the nested statement(s) won't even be run once.
 *  Like with the if statement, you can group multiple statements within the same while loop by surrounding
 *  a group of statements with curly braces, or by using the alternate syntax:
 *  while (expr):
 *    statement
 *   endwhile;
 */
static sxi32 PH7_CompileWhile(ph7_gen_state *pGen)
{ 
	GenBlock *pWhileBlock = 0;
	SyToken *pTmp,*pEnd = 0;
	sxu32 nFalseJump;
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	/* Jump the 'while' keyword */
	pGen->pIn++;    
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '(' after 'while' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Jump the left parenthesis '(' */
	pGen->pIn++; 
	/* Create the loop block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_LOOP,PH7_VmInstrLength(pGen->pVm),0,&pWhileBlock);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Delimit the condition */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pGen->pIn == pEnd || pEnd >= pGen->pEnd ){
		/* Empty expression */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected expression after 'while' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
	}
	/* Swap token streams */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	/* Compile the expression */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	if( rc == SXERR_ABORT ){
		/* Expression handler request an operation abort [i.e: Out-of-memory] */
		return SXERR_ABORT;
	}
	/* Update token stream */
	while(pGen->pIn < pEnd ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Unexpected token '%z'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		pGen->pIn++;
	}
	/* Synchronize pointers */
	pGen->pIn  = &pEnd[1];
	pGen->pEnd = pTmp;
	/* Emit the false jump */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_JZ,0,0,0,&nFalseJump);
	/* Save the instruction index so we can fix it later when the jump destination is resolved */
	GenStateNewJumpFixup(pWhileBlock,PH7_OP_JZ,nFalseJump);
	/* Compile the loop body */
	rc = PH7_CompileBlock(&(*pGen),PH7_TKWRD_ENDWHILE);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	/* Emit the unconditional jump to the start of the loop */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,pWhileBlock->nFirstInstr,0,0);
	/* Fix all jumps now the destination is resolved */
	GenStateFixJumps(pWhileBlock,-1,PH7_VmInstrLength(pGen->pVm));
	/* Release the loop block */
	GenStateLeaveBlock(pGen,0);
	/* Statement successfully compiled */
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon ';' so we can avoid 
	 * compiling this erroneous block.
	 */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI|PH7_TK_OCB)) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the ugly do..while() statement.
 * According to the PHP language reference
 *  do-while loops are very similar to while loops, except the truth expression is checked
 *  at the end of each iteration instead of in the beginning. The main difference from regular
 *  while loops is that the first iteration of a do-while loop is guaranteed to run
 *  (the truth expression is only checked at the end of the iteration), whereas it may not 
 *  necessarily run with a regular while loop (the truth expression is checked at the beginning
 *  of each iteration, if it evaluates to FALSE right from the beginning, the loop execution
 *  would end immediately).
 *  There is just one syntax for do-while loops:
 *  <?php
 *  $i = 0;
 *  do {
 *   echo $i;
 *  } while ($i > 0);
 * ?>
 */
static sxi32 PH7_CompileDoWhile(ph7_gen_state *pGen)
{
	SyToken *pTmp,*pEnd = 0;
	GenBlock *pDoBlock = 0;
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	/* Jump the 'do' keyword */
	pGen->pIn++;   
	/* Create the loop block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_LOOP,PH7_VmInstrLength(pGen->pVm),0,&pDoBlock);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Deffer 'continue;' jumps until we compile the block */
	pDoBlock->bPostContinue = TRUE;
	rc = PH7_CompileBlock(&(*pGen),0);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	if( pGen->pIn < pGen->pEnd ){
		nLine = pGen->pIn->nLine;
	}
	if( pGen->pIn >= pGen->pEnd || pGen->pIn->nType != PH7_TK_KEYWORD ||
		SX_PTR_TO_INT(pGen->pIn->pUserData) != PH7_TKWRD_WHILE ){
			/* Missing 'while' statement */
			rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Missing 'while' statement after 'do' block");
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			goto Synchronize;
	}
	/* Jump the 'while' keyword */
	pGen->pIn++;    
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '(' after 'while' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Jump the left parenthesis '(' */
	pGen->pIn++; 
	/* Delimit the condition */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pGen->pIn == pEnd || pEnd >= pGen->pEnd ){
		/* Empty expression */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected expression after 'while' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Fix post-continue jumps now the jump destination is resolved */
	if( SySetUsed(&pDoBlock->aPostContFix) > 0 ){
		JumpFixup *aPost;
		VmInstr *pInstr;
		sxu32 nJumpDest;
		sxu32 n;
		aPost = (JumpFixup *)SySetBasePtr(&pDoBlock->aPostContFix);
		nJumpDest = PH7_VmInstrLength(pGen->pVm);
		for( n = 0 ; n < SySetUsed(&pDoBlock->aPostContFix) ; ++n ){
			pInstr = PH7_VmGetInstr(pGen->pVm,aPost[n].nInstrIdx);
			if( pInstr ){
				/* Fix */
				pInstr->iP2 = nJumpDest;
			}
		}
	}
	/* Swap token streams */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	/* Compile the expression */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	if( rc == SXERR_ABORT ){
		/* Expression handler request an operation abort [i.e: Out-of-memory] */
		return SXERR_ABORT;
	}
	/* Update token stream */
	while(pGen->pIn < pEnd ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Unexpected token '%z'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		pGen->pIn++;
	}
	pGen->pIn  = &pEnd[1];
	pGen->pEnd = pTmp;
	/* Emit the true jump to the beginning of the loop */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_JNZ,0,pDoBlock->nFirstInstr,0,0);
	/* Fix all jumps now the destination is resolved */
	GenStateFixJumps(pDoBlock,-1,PH7_VmInstrLength(pGen->pVm));
	/* Release the loop block */
	GenStateLeaveBlock(pGen,0);
	/* Statement successfully compiled */
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon ';' so we can avoid 
	 * compiling this erroneous block.
	 */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI|PH7_TK_OCB)) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the complex and powerful 'for' statement.
 * According to the PHP language reference
 *  for loops are the most complex loops in PHP. They behave like their C counterparts.
 *  The syntax of a for loop is:
 *  for (expr1; expr2; expr3)
 *   statement
 *  The first expression (expr1) is evaluated (executed) once unconditionally at
 *  the beginning of the loop.
 *  In the beginning of each iteration, expr2 is evaluated. If it evaluates to
 *  TRUE, the loop continues and the nested statement(s) are executed. If it evaluates
 *  to FALSE, the execution of the loop ends.
 *  At the end of each iteration, expr3 is evaluated (executed).
 *  Each of the expressions can be empty or contain multiple expressions separated by commas.
 *  In expr2, all expressions separated by a comma are evaluated but the result is taken
 *  from the last part. expr2 being empty means the loop should be run indefinitely
 *  (PHP implicitly considers it as TRUE, like C). This may not be as useless as you might
 *  think, since often you'd want to end the loop using a conditional break statement instead
 *  of using the for truth expression.
 */
static sxi32 PH7_CompileFor(ph7_gen_state *pGen)
{
	SyToken *pTmp,*pPostStart,*pEnd = 0;
	GenBlock *pForBlock = 0;
	sxu32 nFalseJump;
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	/* Jump the 'for' keyword */
	pGen->pIn++;    
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '(' after 'for' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	/* Jump the left parenthesis '(' */
	pGen->pIn++; 
	/* Delimit the init-expr;condition;post-expr */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pGen->pIn == pEnd || pEnd >= pGen->pEnd ){
		/* Empty expression */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"for: Invalid expression");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		/* Synchronize */
		pGen->pIn = pEnd;
		if( pGen->pIn < pGen->pEnd ){
			pGen->pIn++;
		}
		return SXRET_OK;
	}
	/* Swap token streams */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	/* Compile initialization expressions if available */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	/* Pop operand lvalues */
	if( rc == SXERR_ABORT ){
		/* Expression handler request an operation abort [i.e: Out-of-memory] */
		return SXERR_ABORT;
	}else if( rc != SXERR_EMPTY ){
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
	}
	if( (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
			"for: Expected ';' after initialization expressions");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	/* Jump the trailing ';' */
	pGen->pIn++;
	/* Create the loop block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_LOOP,PH7_VmInstrLength(pGen->pVm),0,&pForBlock);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Deffer continue jumps */
	pForBlock->bPostContinue = TRUE;
	/* Compile the condition */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	if( rc == SXERR_ABORT ){
		/* Expression handler request an operation abort [i.e: Out-of-memory] */
		return SXERR_ABORT;
	}else if( rc != SXERR_EMPTY ){
		/* Emit the false jump */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_JZ,0,0,0,&nFalseJump);
		/* Save the instruction index so we can fix it later when the jump destination is resolved */
		GenStateNewJumpFixup(pForBlock,PH7_OP_JZ,nFalseJump);
	}
	if( (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
			"for: Expected ';' after conditionals expressions");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	/* Jump the trailing ';' */
	pGen->pIn++;
	/* Save the post condition stream */
	pPostStart = pGen->pIn;
	/* Compile the loop body */
	pGen->pIn  = &pEnd[1]; /* Jump the trailing parenthesis ')' */
	pGen->pEnd = pTmp;
	rc = PH7_CompileBlock(&(*pGen),PH7_TKWRD_ENDFOR);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	/* Fix post-continue jumps */
	if( SySetUsed(&pForBlock->aPostContFix) > 0 ){
		JumpFixup *aPost;
		VmInstr *pInstr;
		sxu32 nJumpDest;
		sxu32 n;
		aPost = (JumpFixup *)SySetBasePtr(&pForBlock->aPostContFix);
		nJumpDest = PH7_VmInstrLength(pGen->pVm);
		for( n = 0 ; n < SySetUsed(&pForBlock->aPostContFix) ; ++n ){
			pInstr = PH7_VmGetInstr(pGen->pVm,aPost[n].nInstrIdx);
			if( pInstr ){
				/* Fix jump */
				pInstr->iP2 = nJumpDest;
			}
		}
	}
	/* compile the post-expressions if available */
	while( pPostStart < pEnd && (pPostStart->nType & PH7_TK_SEMI) ){
		pPostStart++;
	}
	if( pPostStart < pEnd ){
		SyToken *pTmpIn,*pTmpEnd;
		SWAP_DELIMITER(pGen,pPostStart,pEnd);
		rc = PH7_CompileExpr(&(*pGen),0,0);
		if( pGen->pIn < pGen->pEnd ){
			/* Syntax error */
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"for: Expected ')' after post-expressions");
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			return SXRET_OK;
		}
		RE_SWAP_DELIMITER(pGen);
		if( rc == SXERR_ABORT ){
			/* Expression handler request an operation abort [i.e: Out-of-memory] */
			return SXERR_ABORT;
		}else if( rc != SXERR_EMPTY){
			/* Pop operand lvalue */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
		}
	}
	/* Emit the unconditional jump to the start of the loop */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,pForBlock->nFirstInstr,0,0);
	/* Fix all jumps now the destination is resolved */
	GenStateFixJumps(pForBlock,-1,PH7_VmInstrLength(pGen->pVm));
	/* Release the loop block */
	GenStateLeaveBlock(pGen,0);
	/* Statement successfully compiled */
	return SXRET_OK;
}
/* Expression tree validator callback used by the 'foreach' statement.
 * Note that only variable expression [i.e: $x; ${'My'.'Var'}; ${$a['key]};...]
 * are allowed.
 */
static sxi32 GenStateForEachNodeValidator(ph7_gen_state *pGen,ph7_expr_node *pRoot)
{
	sxi32 rc = SXRET_OK; /* Assume a valid expression tree */
	if( pRoot->xCode != PH7_CompileVariable ){
		/* Unexpected expression */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
			"foreach: Expecting a variable name");
		if( rc != SXERR_ABORT ){
			rc = SXERR_INVALID;
		}
	}
	return rc;
}
/*
 * Compile the 'foreach' statement.
 * According to the PHP language reference
 *  The foreach construct simply gives an easy way to iterate over arrays. foreach works
 *  only on arrays (and objects), and will issue an error when you try to use it on a variable
 *  with a different data type or an uninitialized variable. There are two syntaxes; the second
 *  is a minor but useful extension of the first:
 *  foreach (array_expression as $value)
 *    statement
 *  foreach (array_expression as $key => $value)
 *   statement
 *  The first form loops over the array given by array_expression. On each loop, the value 
 *  of the current element is assigned to $value and the internal array pointer is advanced
 *  by one (so on the next loop, you'll be looking at the next element).
 *  The second form does the same thing, except that the current element's key will be assigned
 *  to the variable $key on each loop.
 *  Note:
 *  When foreach first starts executing, the internal array pointer is automatically reset to the
 *  first element of the array. This means that you do not need to call reset() before a foreach loop.
 *  Note:
 *  Unless the array is referenced, foreach operates on a copy of the specified array and not the array
 *  itself. foreach has some side effects on the array pointer. Don't rely on the array pointer during
 *  or after the foreach without resetting it.
 *  You can easily modify array's elements by preceding $value with &. This will assign reference instead
 *  of copying the value. 
 */
static sxi32 PH7_CompileForeach(ph7_gen_state *pGen)
{ 
	SyToken *pCur,*pTmp,*pEnd = 0;
	GenBlock *pForeachBlock = 0;
	ph7_foreach_info *pInfo;
	sxu32 nFalseJump;
	VmInstr *pInstr;
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	/* Jump the 'foreach' keyword */
	pGen->pIn++;    
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"foreach: Expected '('");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Jump the left parenthesis '(' */
	pGen->pIn++; 
	/* Create the loop block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_LOOP,PH7_VmInstrLength(pGen->pVm),0,&pForeachBlock);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Delimit the expression */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pGen->pIn == pEnd || pEnd >= pGen->pEnd ){
		/* Empty expression */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"foreach: Missing expression");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		/* Synchronize */
		pGen->pIn = pEnd;
		if( pGen->pIn < pGen->pEnd ){
			pGen->pIn++;
		}
		return SXRET_OK;
	}
	/* Compile the array expression */
	pCur = pGen->pIn;
	while( pCur < pEnd ){
		if( pCur->nType & PH7_TK_KEYWORD ){
			sxi32 nKeywrd = SX_PTR_TO_INT(pCur->pUserData);
			if( nKeywrd == PH7_TKWRD_AS ){
				/* Break with the first 'as' found */
				break;
			}
		}
		/* Advance the stream cursor */
		pCur++;
	}
	if( pCur <= pGen->pIn ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,
			"foreach: Missing array/object expression");
		if( rc == SXERR_ABORT ){
			/* Don't worry about freeing memory, everything will be released shortly */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Swap token streams */
	pTmp = pGen->pEnd;
	pGen->pEnd = pCur;
	rc = PH7_CompileExpr(&(*pGen),0,0);
	if( rc == SXERR_ABORT ){
		/* Expression handler request an operation abort [i.e: Out-of-memory] */
		return SXERR_ABORT;
	}
	/* Update token stream */
	while(pGen->pIn < pCur ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"foreach: Unexpected token '%z'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			/* Don't worry about freeing memory, everything will be released shortly */
			return SXERR_ABORT;
		}
		pGen->pIn++;
	}
	pCur++; /* Jump the 'as' keyword */
	pGen->pIn = pCur; 
	if( pGen->pIn >= pEnd ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"foreach: Missing $key => $value pair");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* Create the foreach context */
	pInfo = (ph7_foreach_info *)SyMemBackendAlloc(&pGen->pVm->sAllocator,sizeof(ph7_foreach_info));
	if( pInfo == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Fatal, PH7 engine is running out-of-memory");
		return SXERR_ABORT;
	}
	/* Zero the structure */
	SyZero(pInfo,sizeof(ph7_foreach_info));
	/* Initialize structure fields */
	SySetInit(&pInfo->aStep,&pGen->pVm->sAllocator,sizeof(ph7_foreach_step *));
	/* Check if we have a key field */
	while( pCur < pEnd && (pCur->nType & PH7_TK_ARRAY_OP) == 0 ){
		pCur++;
	}
	if( pCur < pEnd ){
		/* Compile the expression holding the key name */
		if( pGen->pIn >= pCur ){
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"foreach: Missing $key");
			if( rc == SXERR_ABORT ){
				/* Don't worry about freeing memory, everything will be released shortly */
				return SXERR_ABORT;
			}
		}else{
			pGen->pEnd = pCur;
			rc = PH7_CompileExpr(&(*pGen),0,GenStateForEachNodeValidator);
			if( rc == SXERR_ABORT ){
				/* Don't worry about freeing memory, everything will be released shortly */
				return SXERR_ABORT;
			}
			pInstr = PH7_VmPopInstr(pGen->pVm);
			if( pInstr->p3 ){
				/* Record key name */
				SyStringInitFromBuf(&pInfo->sKey,pInstr->p3,SyStrlen((const char *)pInstr->p3));
			}
			pInfo->iFlags |= PH7_4EACH_STEP_KEY;
		}
		pGen->pIn = &pCur[1]; /* Jump the arrow */
	}
	pGen->pEnd = pEnd;
	if( pGen->pIn >= pEnd ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"foreach: Missing $value");
		if( rc == SXERR_ABORT ){
			/* Don't worry about freeing memory, everything will be released shortly */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	if( pGen->pIn->nType & PH7_TK_AMPER /*'&'*/){
		pGen->pIn++;
		/* Pass by reference  */
		pInfo->iFlags |= PH7_4EACH_STEP_REF;
	}
	/* Compile the expression holding the value name */
	rc = PH7_CompileExpr(&(*pGen),0,GenStateForEachNodeValidator);
	if( rc == SXERR_ABORT ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_ABORT;
	}
	pInstr = PH7_VmPopInstr(pGen->pVm);
	if( pInstr->p3 ){
		/* Record value name */
		SyStringInitFromBuf(&pInfo->sValue,pInstr->p3,SyStrlen((const char *)pInstr->p3));
	}
	/* Emit the 'FOREACH_INIT' instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_FOREACH_INIT,0,0,pInfo,&nFalseJump);
	/* Save the instruction index so we can fix it later when the jump destination is resolved */
	GenStateNewJumpFixup(pForeachBlock,PH7_OP_FOREACH_INIT,nFalseJump);
	/* Record the first instruction to execute */
	pForeachBlock->nFirstInstr = PH7_VmInstrLength(pGen->pVm);
	/* Emit the FOREACH_STEP instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_FOREACH_STEP,0,0,pInfo,&nFalseJump);
	/* Save the instruction index so we can fix it later when the jump destination is resolved */
	GenStateNewJumpFixup(pForeachBlock,PH7_OP_FOREACH_STEP,nFalseJump);
	/* Compile the loop body */
	pGen->pIn = &pEnd[1];
	pGen->pEnd = pTmp;
	rc = PH7_CompileBlock(&(*pGen),PH7_TKWRD_END4EACH);
	if( rc == SXERR_ABORT ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_ABORT;
	}
	/* Emit the unconditional jump to the start of the loop */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,pForeachBlock->nFirstInstr,0,0);
	/* Fix all jumps now the destination is resolved */
	GenStateFixJumps(pForeachBlock,-1,PH7_VmInstrLength(pGen->pVm));
	/* Release the loop block */
	GenStateLeaveBlock(pGen,0);
	/* Statement successfully compiled */
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon ';' so we can avoid 
	 * compiling this erroneous block.
	 */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI|PH7_TK_OCB)) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the infamous if/elseif/else if/else statements.
 * According to the PHP language reference
 *  The if construct is one of the most important features of many languages PHP included.
 *  It allows for conditional execution of code fragments. PHP features an if structure 
 *  that is similar to that of C:
 *  if (expr)
 *   statement
 *  else construct:
 *   Often you'd want to execute a statement if a certain condition is met, and a different
 *   statement if the condition is not met. This is what else is for. else extends an if statement
 *   to execute a statement in case the expression in the if statement evaluates to FALSE.
 *   For example, the following code would display a is greater than b if $a is greater than
 *   $b, and a is NOT greater than b otherwise.
 *   The else statement is only executed if the if expression evaluated to FALSE, and if there
 *   were any elseif expressions - only if they evaluated to FALSE as well
 *  elseif
 *   elseif, as its name suggests, is a combination of if and else. Like else, it extends
 *   an if statement to execute a different statement in case the original if expression evaluates
 *   to FALSE. However, unlike else, it will execute that alternative expression only if the elseif
 *   conditional expression evaluates to TRUE. For example, the following code would display a is bigger
 *   than b, a equal to b or a is smaller than b:
 *   <?php
 *    if ($a > $b) {
 *     echo "a is bigger than b";
 *    } elseif ($a == $b) {
 *     echo "a is equal to b";
 *    } else {
 *     echo "a is smaller than b";
 *    }
 *    ?>
 */
static sxi32 PH7_CompileIf(ph7_gen_state *pGen)
{
	SyToken *pToken,*pTmp,*pEnd = 0;
	GenBlock *pCondBlock = 0;
	sxu32 nJumpIdx;
	sxu32 nKeyID;
	sxi32 rc;
	/* Jump the 'if' keyword */
	pGen->pIn++;
	pToken = pGen->pIn; 
	/* Create the conditional block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_COND,PH7_VmInstrLength(pGen->pVm),0,&pCondBlock);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Process as many [if/else if/elseif/else] blocks as we can */
	for(;;){
		if( pToken >= pGen->pEnd || (pToken->nType & PH7_TK_LPAREN) == 0 ){
			/* Syntax error */
			if( pToken >= pGen->pEnd ){
				pToken--;
			}
			rc = PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,"if/else/elseif: Missing '('");
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			goto Synchronize;
		}
		/* Jump the left parenthesis '(' */
		pToken++; 
		/* Delimit the condition */
		PH7_DelimitNestedTokens(pToken,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
		if( pToken >= pEnd || (pEnd->nType & PH7_TK_RPAREN) == 0 ){
			/* Syntax error */
			if( pToken >= pGen->pEnd ){
				pToken--;
			}
			rc = PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,"if/else/elseif: Missing ')'");
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			goto Synchronize;
		}
		/* Swap token streams */
		SWAP_TOKEN_STREAM(pGen,pToken,pEnd);
		/* Compile the condition */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		/* Update token stream */
		while(pGen->pIn < pEnd ){
			PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Unexpected token '%z'",&pGen->pIn->sData);
			pGen->pIn++;
		}
		pGen->pIn  = &pEnd[1];
		pGen->pEnd = pTmp;
		if( rc == SXERR_ABORT ){
			/* Expression handler request an operation abort [i.e: Out-of-memory] */
			return SXERR_ABORT;
		}
		/* Emit the false jump */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_JZ,0,0,0,&nJumpIdx);
		/* Save the instruction index so we can fix it later when the jump destination is resolved */
		GenStateNewJumpFixup(pCondBlock,PH7_OP_JZ,nJumpIdx);
		/* Compile the body */
		rc = PH7_CompileBlock(&(*pGen),PH7_TKWRD_ENDIF);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 ){
			break;
		}
		/* Ensure that the keyword ID is 'else if' or 'else' */
		nKeyID = (sxu32)SX_PTR_TO_INT(pGen->pIn->pUserData);
		if( (nKeyID & (PH7_TKWRD_ELSE|PH7_TKWRD_ELIF)) == 0 ){
			break;
		}
		/* Emit the unconditional jump */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,0,0,&nJumpIdx);
		/* Save the instruction index so we can fix it later when the jump destination is resolved */
		GenStateNewJumpFixup(pCondBlock,PH7_OP_JMP,nJumpIdx);
		if( nKeyID & PH7_TKWRD_ELSE ){
			pToken = &pGen->pIn[1];
			if( pToken >= pGen->pEnd || (pToken->nType & PH7_TK_KEYWORD) == 0 ||
				SX_PTR_TO_INT(pToken->pUserData) != PH7_TKWRD_IF ){
					break;
			}
			pGen->pIn++; /* Jump the 'else' keyword */
		}
		pGen->pIn++; /* Jump the 'elseif/if' keyword */
		/* Synchronize cursors */
		pToken = pGen->pIn;
		/* Fix the false jump */
		GenStateFixJumps(pCondBlock,PH7_OP_JZ,PH7_VmInstrLength(pGen->pVm));
	} /* For(;;) */
	/* Fix the false jump */
	GenStateFixJumps(pCondBlock,PH7_OP_JZ,PH7_VmInstrLength(pGen->pVm));
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) &&
		(SX_PTR_TO_INT(pGen->pIn->pUserData) & PH7_TKWRD_ELSE) ){
			/* Compile the else block */
			pGen->pIn++;
			rc = PH7_CompileBlock(&(*pGen),PH7_TKWRD_ENDIF);
			if( rc == SXERR_ABORT ){
				
				return SXERR_ABORT;
			}
	}
	nJumpIdx = PH7_VmInstrLength(pGen->pVm);
	/* Fix all unconditional jumps now the destination is resolved */
	GenStateFixJumps(pCondBlock,PH7_OP_JMP,nJumpIdx);
	/* Release the conditional block */
	GenStateLeaveBlock(pGen,0);
	/* Statement successfully compiled */
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon ';' so we can avoid compiling this erroneous block.
	 */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI|PH7_TK_OCB)) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the global construct.
 * According to the PHP language reference
 *  In PHP global variables must be declared global inside a function if they are going
 *  to be used in that function.
 *  Example #1 Using global
 *  <?php
 *   $a = 1;
 *   $b = 2;
 *   function Sum()
 *   {
 *    global $a, $b;
 *    $b = $a + $b;
 *   } 
 *   Sum();
 *   echo $b;
 *  ?>
 *  The above script will output 3. By declaring $a and $b global within the function
 *  all references to either variable will refer to the global version. There is no limit
 *  to the number of global variables that can be manipulated by a function.
 */
static sxi32 PH7_CompileGlobal(ph7_gen_state *pGen)
{
	SyToken *pTmp,*pNext = 0;
	sxi32 nExpr;
	sxi32 rc;
	/* Jump the 'global' keyword */
	pGen->pIn++;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_SEMI) ){
		/* Nothing to process */
		return SXRET_OK;
	}
	pTmp = pGen->pEnd;
	nExpr = 0;
	while( SXRET_OK == PH7_GetNextExpr(pGen->pIn,pTmp,&pNext) ){
		if( pGen->pIn < pNext ){
			pGen->pEnd = pNext;
			if( (pGen->pIn->nType & PH7_TK_DOLLAR) == 0 ){
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"global: Expected variable name");
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}else{
				pGen->pIn++;
				if( pGen->pIn >= pGen->pEnd ){
					/* Emit a warning */
					PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn[-1].nLine,"global: Empty variable name");
				}else{
					rc = PH7_CompileExpr(&(*pGen),0,0);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}else if(rc != SXERR_EMPTY ){
						nExpr++;
					}
				}
			}
		}
		/* Next expression in the stream */
		pGen->pIn = pNext;
		/* Jump trailing commas */
		while( pGen->pIn < pTmp && (pGen->pIn->nType & PH7_TK_COMMA) ){
			pGen->pIn++;
		}
	}
	/* Restore token stream */
	pGen->pEnd = pTmp;
	if( nExpr > 0 ){
		/* Emit the uplink instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_UPLINK,nExpr,0,0,0);
	}
	return SXRET_OK;
}
/*
 * Compile the return statement.
 * According to the PHP language reference
 *  If called from within a function, the return() statement immediately ends execution
 *  of the current function, and returns its argument as the value of the function call.
 *  return() will also end the execution of an eval() statement or script file.
 *  If called from the global scope, then execution of the current script file is ended.
 *  If the current script file was include()ed or require()ed, then control is passed back
 *  to the calling file. Furthermore, if the current script file was include()ed, then the value
 *  given to return() will be returned as the value of the include() call. If return() is called
 *  from within the main script file, then script execution end.
 *  Note that since return() is a language construct and not a function, the parentheses
 *  surrounding its arguments are not required. It is common to leave them out, and you actually
 *  should do so as PHP has less work to do in this case. 
 *  Note: If no parameter is supplied, then the parentheses must be omitted and NULL will be returned.
 */
static sxi32 PH7_CompileReturn(ph7_gen_state *pGen)
{
	sxi32 nRet = 0; /* TRUE if there is a return value */
	sxi32 rc;
	/* Jump the 'return' keyword */
	pGen->pIn++;
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		/* Compile the expression */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}else if(rc != SXERR_EMPTY ){
			nRet = 1;
		}
	}
	/* Emit the done instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,nRet,0,0,0);
	return SXRET_OK;
}
/*
 * Compile the die/exit language construct.
 * The role of these constructs is to terminate execution of the script.
 * Shutdown functions will always be executed even if exit() is called. 
 */
static sxi32 PH7_CompileHalt(ph7_gen_state *pGen)
{
	sxi32 nExpr = 0;
	sxi32 rc;
	/* Jump the die/exit keyword */
	pGen->pIn++;
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		/* Compile the expression */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}else if(rc != SXERR_EMPTY ){
			nExpr = 1;
		}
	}
	/* Emit the HALT instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_HALT,nExpr,0,0,0);
	return SXRET_OK;
}
/*
 * Compile the 'echo' language construct.
 */
static sxi32 PH7_CompileEcho(ph7_gen_state *pGen)
{
	SyToken *pTmp,*pNext = 0;
	sxi32 rc;
	/* Jump the 'echo' keyword */
	pGen->pIn++;
	/* Compile arguments one after one */
	pTmp = pGen->pEnd;
	while( SXRET_OK == PH7_GetNextExpr(pGen->pIn,pTmp,&pNext) ){
		if( pGen->pIn < pNext ){
			pGen->pEnd = pNext;
			rc = PH7_CompileExpr(&(*pGen),EXPR_FLAG_RDONLY_LOAD/* Do not create variable if inexistant */,0);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}else if( rc != SXERR_EMPTY ){
				/* Emit the consume instruction */
				PH7_VmEmitInstr(pGen->pVm,PH7_OP_CONSUME,1,0,0,0);
			}
		}
		/* Jump trailing commas */
		while( pNext < pTmp && (pNext->nType & PH7_TK_COMMA) ){
			pNext++;
		}
		pGen->pIn = pNext;
	}
	/* Restore token stream */
	pGen->pEnd = pTmp;	
	return SXRET_OK;
}
/*
 * Compile the static statement.
 * According to the PHP language reference
 *  Another important feature of variable scoping is the static variable.
 *  A static variable exists only in a local function scope, but it does not lose its value
 *  when program execution leaves this scope.
 *  Static variables also provide one way to deal with recursive functions.
 * Symisc eXtension.
 *  PH7 allow any complex expression to be associated with the static variable while
 *  the zend engine would allow only simple scalar value.
 *  Example
 *    static $myVar = "Welcome "." guest ".rand_str(3); //Valid under PH7/Generate error using the zend engine
 *    Refer to the official documentation for more information on this feature.
 */
static sxi32 PH7_CompileStatic(ph7_gen_state *pGen)
{
	ph7_vm_func_static_var sStatic; /* Structure describing the static variable */
	ph7_vm_func *pFunc;             /* Enclosing function */
	GenBlock *pBlock;
	SyString *pName;
	char *zDup;
	sxu32 nLine;
	sxi32 rc;
	/* Jump the static keyword */
	nLine = pGen->pIn->nLine;
	pGen->pIn++;
	/* Extract the enclosing function if any */
	pBlock = pGen->pCurrent;
	while( pBlock ){
		if( pBlock->iFlags & GEN_BLOCK_FUNC){
			break;
		}
		/* Point to the upper block */
		pBlock = pBlock->pParent;
	}
	if( pBlock == 0 ){
		/* Static statement,called outside of a function body,treat it as a simple variable. */
		if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR) == 0 ){
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Expected variable after 'static' keyword");
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			goto Synchronize;
		}
		/* Compile the expression holding the variable */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}else if( rc != SXERR_EMPTY ){
			/* Emit the POP instruction */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
		}
		return SXRET_OK;
	}
	pFunc = (ph7_vm_func *)pBlock->pUserData;
	/* Make sure we are dealing with a valid statement */
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR) == 0 || &pGen->pIn[1] >= pGen->pEnd ||
		(pGen->pIn[1].nType & (PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Expected variable after 'static' keyword");
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			goto Synchronize;
	}
	pGen->pIn++;
	/* Extract variable name */
	pName = &pGen->pIn->sData;
	pGen->pIn++; /* Jump the var name */
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI/*';'*/|PH7_TK_EQUAL/*'='*/)) == 0 ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"static: Unexpected token '%z'",&pGen->pIn->sData);
		goto Synchronize;
	}
	/* Initialize the structure describing the static variable */
	SySetInit(&sStatic.aByteCode,&pGen->pVm->sAllocator,sizeof(VmInstr));
	sStatic.nIdx = SXU32_HIGH; /* Not yet created */
	/* Duplicate variable name */
	zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
	if( zDup == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Fatal, PH7 engine is running out of memory");
		return SXERR_ABORT;
	}
	SyStringInitFromBuf(&sStatic.sName,zDup,pName->nByte);
	/* Check if we have an expression to compile */
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_EQUAL) ){
		SySet *pInstrContainer;
		/* TICKET 1433-014: Symisc extension to the PHP programming language
		 * Static variable can take any complex expression including function
		 * call as their initialization value.
		 * Example:
		 *		static $var = foo(1,4+5,bar());
		 */
		pGen->pIn++; /* Jump the equal '=' sign */
		/* Swap bytecode container */
		pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
		PH7_VmSetByteCodeContainer(pGen->pVm,&sStatic.aByteCode);
		/* Compile the expression */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		/* Emit the done instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,(rc != SXERR_EMPTY ? 1 : 0),0,0,0);
		/* Restore default bytecode container */
		PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer);
	}
	/* Finally save the compiled static variable in the appropriate container */
	SySetPut(&pFunc->aStatic,(const void *)&sStatic);
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon ';',so we can avoid compiling this erroneous
	 * statement. 
	 */
	while(pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) ==  0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Compile the var statement.
 * Symisc Extension:
 *      var statement can be used outside of a class definition.
 */
static sxi32 PH7_CompileVar(ph7_gen_state *pGen)
{
	sxu32 nLine = pGen->pIn->nLine;
	sxi32 rc;
	/* Jump the 'var' keyword */
	pGen->pIn++;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR/*'$'*/) == 0 ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"var: Expecting variable name");
		/* Synchronize with the first semi-colon */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI/*';'*/) == 0 ){
			pGen->pIn++;
		}
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}else{
		/* Compile the expression */
		rc = PH7_CompileExpr(&(*pGen),0,0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}else if( rc != SXERR_EMPTY ){
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
		}
	}
	return SXRET_OK;
}
/*
 * Compile a namespace statement
 * According to the PHP language reference manual
 *  What are namespaces? In the broadest definition namespaces are a way of encapsulating items.
 *  This can be seen as an abstract concept in many places. For example, in any operating system
 *  directories serve to group related files, and act as a namespace for the files within them.
 *  As a concrete example, the file foo.txt can exist in both directory /home/greg and in /home/other
 *  but two copies of foo.txt cannot co-exist in the same directory. In addition, to access the foo.txt
 *  file outside of the /home/greg directory, we must prepend the directory name to the file name using
 *  the directory separator to get /home/greg/foo.txt. This same principle extends to namespaces in the
 *  programming world.
 *  In the PHP world, namespaces are designed to solve two problems that authors of libraries and applications
 *  encounter when creating re-usable code elements such as classes or functions:
 *  Name collisions between code you create, and internal PHP classes/functions/constants or third-party 
 *  classes/functions/constants.
 *  Ability to alias (or shorten) Extra_Long_Names designed to alleviate the first problem, improving 
 *  readability of source code.
 *  PHP Namespaces provide a way in which to group related classes, interfaces, functions and constants.
 *  Here is an example of namespace syntax in PHP: 
 *       namespace my\name; // see "Defining Namespaces" section
 *       class MyClass {}
 *       function myfunction() {}
 *       const MYCONST = 1;
 *       $a = new MyClass;
 *       $c = new \my\name\MyClass;
 *       $a = strlen('hi');
 *       $d = namespace\MYCONST;
 *       $d = __NAMESPACE__ . '\MYCONST';
 *       echo constant($d);
 * NOTE
 *  AS OF THIS VERSION NAMESPACE SUPPORT IS DISABLED. IF YOU NEED A WORKING VERSION THAT IMPLEMENT 
 *  NAMESPACE,PLEASE CONTACT SYMISC SYSTEMS VIA contact@symisc.net.
 */
static sxi32 PH7_CompileNamespace(ph7_gen_state *pGen)
{
	sxu32 nLine = pGen->pIn->nLine;
	sxi32 rc;
	pGen->pIn++; /* Jump the 'namespace' keyword */
	if( pGen->pIn >= pGen->pEnd ||
		(pGen->pIn->nType & (PH7_TK_NSSEP|PH7_TK_ID|PH7_TK_KEYWORD|PH7_TK_SEMI/*';'*/|PH7_TK_OCB/*'{'*/)) == 0 ){
			SyToken *pTok = pGen->pIn;
			if( pTok >= pGen->pEnd ){
				pTok--;
			}
			/* Unexpected token */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Namespace: Unexpected token '%z'",&pTok->sData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
	}
	/* Ignore the path */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_NSSEP/*'\'*/|PH7_TK_ID|PH7_TK_KEYWORD)) ){
		pGen->pIn++;
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI/*';'*/|PH7_TK_OCB/*'{'*/)) == 0 ){
		/* Unexpected token */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,
			"Namespace: Unexpected token '%z',expecting ';' or '{'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* Emit a warning */
	PH7_GenCompileError(&(*pGen),E_WARNING,nLine,
		"Namespace support is disabled in the current release of the PH7(%s) engine",ph7_lib_version());
	return SXRET_OK;
}
/*
 * Compile the 'use' statement
 * According to the PHP language reference manual
 *  The ability to refer to an external fully qualified name with an alias or importing
 *  is an important feature of namespaces. This is similar to the ability of unix-based
 *  filesystems to create symbolic links to a file or to a directory.
 *  PHP namespaces support three kinds of aliasing or importing: aliasing a class name
 *  aliasing an interface name, and aliasing a namespace name. Note that importing
 *  a function or constant is not supported.
 *  In PHP, aliasing is accomplished with the 'use' operator.
 * NOTE
 *  AS OF THIS VERSION NAMESPACE SUPPORT IS DISABLED. IF YOU NEED A WORKING VERSION THAT IMPLEMENT 
 *  NAMESPACE,PLEASE CONTACT SYMISC SYSTEMS VIA contact@symisc.net.
 */
static sxi32 PH7_CompileUse(ph7_gen_state *pGen)
{
	sxu32 nLine = pGen->pIn->nLine;
	sxi32 rc;
	pGen->pIn++; /* Jump the 'use' keyword */
	/* Assemeble one or more real namespace path */
	for(;;){
		if( pGen->pIn >= pGen->pEnd ){
			break;
		}
		/* Ignore the path */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_NSSEP|PH7_TK_ID))  ){
			pGen->pIn++;
		}
		if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_COMMA/*','*/) ){
			pGen->pIn++; /* Jump the comma and process the next path */
		}else{
			break;
		}
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) && PH7_TKWRD_AS == SX_PTR_TO_INT(pGen->pIn->pUserData) ){
		pGen->pIn++; /* Jump the 'as' keyword */
		/* Compile one or more aliasses */
		for(;;){
			if( pGen->pIn >= pGen->pEnd ){
				break;
			}
			while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_NSSEP|PH7_TK_ID)) ){
				pGen->pIn++;
			}
			if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_COMMA/*','*/) ){
				pGen->pIn++; /* Jump the comma and process the next alias */
			}else{
				break;
			}
		}
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI/*';'*/) == 0 ){
		/* Unexpected token */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"use statement: Unexpected token '%z',expecting ';'",
			&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* Emit a notice */
	PH7_GenCompileError(&(*pGen),E_NOTICE,nLine,
		"Namespace support is disabled in the current release of the PH7(%s) engine",
		ph7_lib_version()
		);
	return SXRET_OK;
}
/*
 * Compile the stupid 'declare' language construct.
 *
 * According to the PHP language reference manual.
 *  The declare construct is used to set execution directives for a block of code.
 *  The syntax of declare is similar to the syntax of other flow control constructs:
 *  declare (directive)
 *   statement
 * The directive section allows the behavior of the declare block to be set.
 *  Currently only two directives are recognized: the ticks directive and the encoding directive.
 * The statement part of the declare block will be executed - how it is executed and what side
 * effects occur during execution may depend on the directive set in the directive block.
 * The declare construct can also be used in the global scope, affecting all code following
 * it (however if the file with declare was included then it does not affect the parent file).
 * <?php
 * // these are the same:
 * // you can use this:
 * declare(ticks=1) {
 *   // entire script here
 * }
 * // or you can use this:
 * declare(ticks=1);
 * // entire script here
 * ?>
 *
 * Well,actually this language construct is a NO-OP in the current release of the PH7 engine.
 */
static sxi32 PH7_CompileDeclare(ph7_gen_state *pGen)
{
	sxu32 nLine = pGen->pIn->nLine;
	SyToken *pEnd = 0; /* cc warning */
	sxi32 rc;
	pGen->pIn++; /* Jump the 'declare' keyword */
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 /*'('*/ ){
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"declare: Expecting opening parenthesis '('");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		goto Synchro;
	}
	pGen->pIn++; /* Jump the left parenthesis */
	/* Delimit the directive */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN/*'('*/,PH7_TK_RPAREN/*')'*/,&pEnd);
	if( pEnd >= pGen->pEnd ){
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"declare: Missing closing parenthesis ')'");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	/* Update the cursor */
	pGen->pIn = &pEnd[1];
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_SEMI/*';'*/|PH7_TK_OCB/*'{'*/)) == 0  ){
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"declare: Expecting ';' or '{' after directive");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* TICKET 1433-81: This construct is disabled in the current release of the PH7 engine. */
	PH7_GenCompileError(&(*pGen),E_NOTICE,nLine, /* Emit a notice */
		"the declare construct is a no-op in the current release of the PH7(%s) engine",
		ph7_lib_version()
		);
	/*All done */
	return SXRET_OK;
Synchro:
	/* Sycnhronize with the first semi-colon ';' or curly braces '{' */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI/*';'*/|PH7_TK_OCB/*'{'*/)) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Process default argument values. That is,a function may define C++-style default value
 * as follows:
 * function makecoffee($type = "cappuccino")
 * {
 *   return "Making a cup of $type.\n";
 * }
 * Symisc eXtension.
 *  1 -) Default arguments value can be any complex expression [i.e: function call,annynoymous
 *      functions,array member,..] unlike the zend which would allow only single scalar value.
 *      Example: Work only with PH7,generate error under zend
 *      function test($a = 'Hello'.'World: '.rand_str(3))
 *      {
 *       var_dump($a);
 *      }
 *     //call test without args
 *      test(); 
 * 2 -) Full type hinting: (Arguments are automatically casted to the desired type)
 *      Example:
 *           function a(string $a){} function b(int $a,string $c,float $d){}
 * 3 -) Function overloading!!
 *      Example:
 *      function foo($a) {
 *   	  return $a.PHP_EOL;
 *	    }
 *	    function foo($a, $b) {
 *   	  return $a + $b;
 *	    }
 *	    echo foo(5); // Prints "5"
 *	    echo foo(5, 2); // Prints "7"
 *      // Same arg
 *	   function foo(string $a)
 *	   {
 *	     echo "a is a string\n";
 *	     var_dump($a);
 *	   }
 *	  function foo(int $a)
 *	  {
 *	    echo "a is integer\n";
 *	    var_dump($a);
 *	  }
 *	  function foo(array $a)
 *	  {
 * 	    echo "a is an array\n";
 * 	    var_dump($a);
 *	  }
 *	  foo('This is a great feature'); // a is a string [first foo]
 *	  foo(52); // a is integer [second foo] 
 *    foo(array(14,__TIME__,__DATE__)); // a is an array [third foo]
 * Please refer to the official documentation for more information on the powerful extension
 * introduced by the PH7 engine.
 */
static sxi32 GenStateProcessArgValue(ph7_gen_state *pGen,ph7_vm_func_arg *pArg,SyToken *pIn,SyToken *pEnd)
{
	SyToken *pTmpIn,*pTmpEnd;
	SySet *pInstrContainer;
	sxi32 rc;
	/* Swap token stream */
	SWAP_DELIMITER(pGen,pIn,pEnd);
	pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
	PH7_VmSetByteCodeContainer(pGen->pVm,&pArg->aByteCode);
	/* Compile the expression holding the argument value */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	/* Emit the done instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,(rc != SXERR_EMPTY ? 1 : 0),0,0,0);
	PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer); 
	RE_SWAP_DELIMITER(pGen);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	return SXRET_OK;
}
/*
 * Collect function arguments one after one.
 * According to the PHP language reference manual.
 * Information may be passed to functions via the argument list, which is a comma-delimited
 * list of expressions.
 * PHP supports passing arguments by value (the default), passing by reference
 * and default argument values. Variable-length argument lists are also supported,
 * see also the function references for func_num_args(), func_get_arg(), and func_get_args()
 * for more information.
 * Example #1 Passing arrays to functions
 * <?php
 * function takes_array($input)
 * {
 *    echo "$input[0] + $input[1] = ", $input[0]+$input[1];
 * }
 * ?>
 * Making arguments be passed by reference
 * By default, function arguments are passed by value (so that if the value of the argument
 * within the function is changed, it does not get changed outside of the function).
 * To allow a function to modify its arguments, they must be passed by reference.
 * To have an argument to a function always passed by reference, prepend an ampersand (&)
 * to the argument name in the function definition:
 * Example #2 Passing function parameters by reference
 * <?php
 * function add_some_extra(&$string)
 * {
 *   $string .= 'and something extra.';
 * }
 * $str = 'This is a string, ';
 * add_some_extra($str);
 * echo $str;    // outputs 'This is a string, and something extra.'
 * ?>
 *
 * PH7 have introduced powerful extension including full type hinting,function overloading
 * complex agrument values.Please refer to the official documentation for more information
 * on these extension.
 */
static sxi32 GenStateCollectFuncArgs(ph7_vm_func *pFunc,ph7_gen_state *pGen,SyToken *pEnd)
{
	ph7_vm_func_arg sArg; /* Current processed argument */
	SyToken *pCur,*pIn;  /* Token stream */
	SyBlob sSig;         /* Function signature */
	char *zDup;          /* Copy of argument name */
	sxi32 rc;

	pIn = pGen->pIn;
	pCur = 0;
	SyBlobInit(&sSig,&pGen->pVm->sAllocator);
	/* Process arguments one after one */
	for(;;){
		if( pIn >= pEnd ){
			/* No more arguments to process */
			break;
		}
		SyZero(&sArg,sizeof(ph7_vm_func_arg));
		SySetInit(&sArg.aByteCode,&pGen->pVm->sAllocator,sizeof(VmInstr));
		if( pIn->nType & (PH7_TK_ID|PH7_TK_KEYWORD) ){
			if( pIn->nType & PH7_TK_KEYWORD ){
				sxu32 nKey = (sxu32)(SX_PTR_TO_INT(pIn->pUserData));
				if( nKey & PH7_TKWRD_ARRAY ){
					sArg.nType = MEMOBJ_HASHMAP;
				}else if( nKey & PH7_TKWRD_BOOL ){
					sArg.nType = MEMOBJ_BOOL;
				}else if( nKey & PH7_TKWRD_INT ){
					sArg.nType = MEMOBJ_INT;
				}else if( nKey & PH7_TKWRD_STRING ){
					sArg.nType = MEMOBJ_STRING;
				}else if( nKey & PH7_TKWRD_FLOAT ){
					sArg.nType = MEMOBJ_REAL;
				}else{
					PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn->nLine,
						"Invalid argument type '%z',Automatic cast will not be performed",
						&pIn->sData);
				}
			}else{
				SyString *pName = &pIn->sData; /* Class name */
				char *zDup;
				/* Argument must be a class instance,record that*/
				zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
				if( zDup ){
					sArg.nType = SXU32_HIGH; /* 0xFFFFFFFF as sentinel */
					SyStringInitFromBuf(&sArg.sClass,zDup,pName->nByte);
				}
			}
			pIn++;
		}
		if( pIn >= pEnd ){
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Missing argument name");
			return rc;
		}
		if( pIn->nType & PH7_TK_AMPER ){
			/* Pass by reference,record that */
			sArg.iFlags = VM_FUNC_ARG_BY_REF;
			pIn++;
		}
		if( pIn >= pEnd || (pIn->nType & PH7_TK_DOLLAR) == 0 || &pIn[1] >= pEnd || (pIn[1].nType & (PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
			/* Invalid argument */ 
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Invalid argument name");
			return rc;
		}
		pIn++; /* Jump the dollar sign */
		/* Copy argument name */
		zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,SyStringData(&pIn->sData),SyStringLength(&pIn->sData));
		if( zDup == 0 ){
			PH7_GenCompileError(&(*pGen),E_ERROR,pIn->nLine,"PH7 engine is running out of memory");
			return SXERR_ABORT;
		}
		SyStringInitFromBuf(&sArg.sName,zDup,SyStringLength(&pIn->sData));
		pIn++;
		if( pIn < pEnd ){
			if( pIn->nType & PH7_TK_EQUAL ){
				SyToken *pDefend;
				sxi32 iNest = 0;
				pIn++; /* Jump the equal sign */
				pDefend = pIn;
				/* Process the default value associated with this argument */
				while( pDefend < pEnd ){
					if( (pDefend->nType & PH7_TK_COMMA) && iNest <= 0 ){
						break;
					}
					if( pDefend->nType & (PH7_TK_LPAREN/*'('*/|PH7_TK_OCB/*'{'*/|PH7_TK_OSB/*[*/) ){
						/* Increment nesting level */
						iNest++;
					}else if( pDefend->nType & (PH7_TK_RPAREN/*')'*/|PH7_TK_CCB/*'}'*/|PH7_TK_CSB/*]*/) ){
						/* Decrement nesting level */
						iNest--;
					}
					pDefend++;
				}
				if( pIn >= pDefend ){
					rc = PH7_GenCompileError(&(*pGen),E_ERROR,pIn->nLine,"Missing argument default value");
					return rc;
				}
				/* Process default value */
				rc = GenStateProcessArgValue(&(*pGen),&sArg,pIn,pDefend);
				if( rc != SXRET_OK ){
					return rc;
				}
				/* Point beyond the default value */
				pIn = pDefend;
			}
			if( pIn < pEnd && (pIn->nType & PH7_TK_COMMA) == 0 ){
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pIn->nLine,"Unexpected token '%z'",&pIn->sData);
				return rc;
			}
			pIn++; /* Jump the trailing comma */
		}
		/* Append argument signature */
		if( sArg.nType > 0 ){
			if( SyStringLength(&sArg.sClass) > 0 ){
				/* Class name */
				SyBlobAppend(&sSig,SyStringData(&sArg.sClass),SyStringLength(&sArg.sClass));
			}else{
				int c;
				c = 'n'; /* cc warning */
				/* Type leading character */
				switch(sArg.nType){
				case MEMOBJ_HASHMAP:
					/* Hashmap aka 'array' */
					c = 'h';
					break;
				case MEMOBJ_INT:
					/* Integer */
					c = 'i';
					break;
				case MEMOBJ_BOOL:
					/* Bool */
					c = 'b';
					break;
				case MEMOBJ_REAL:
					/* Float */
					c = 'f';
					break;
				case MEMOBJ_STRING:
					/* String */
					c = 's';
					break;
				default:
					break;
				}
				SyBlobAppend(&sSig,(const void *)&c,sizeof(char));
			}
		}else{
			/* No type is associated with this parameter which mean
			 * that this function is not condidate for overloading. 
			 */
			SyBlobRelease(&sSig);
		}
		/* Save in the argument set */
		SySetPut(&pFunc->aArgs,(const void *)&sArg);
	}
	if( SyBlobLength(&sSig) > 0 ){
		/* Save function signature */
		SyStringInitFromBuf(&pFunc->sSignature,SyBlobData(&sSig),SyBlobLength(&sSig));
	}
	return SXRET_OK;
}
/*
 * Compile function [i.e: standard function, annonymous function or closure ] body.
 * Return SXRET_OK on success. Any other return value indicates failure
 * and this routine takes care of generating the appropriate error message.
 */
static sxi32 GenStateCompileFuncBody(
	ph7_gen_state *pGen,  /* Code generator state */
	ph7_vm_func *pFunc    /* Function state */
	)
{
	SySet *pInstrContainer; /* Instruction container */
	GenBlock *pBlock;
	sxu32 nGotoOfft;
	sxi32 rc;
	/* Attach the new function */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_PROTECTED|GEN_BLOCK_FUNC,PH7_VmInstrLength(pGen->pVm),pFunc,&pBlock);
	if( rc != SXRET_OK ){
		PH7_GenCompileError(&(*pGen),E_ERROR,1,"PH7 engine is running out-of-memory");
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_ABORT;
	}
	nGotoOfft = SySetUsed(&pGen->aGoto);
	/* Swap bytecode containers */
	pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
	PH7_VmSetByteCodeContainer(pGen->pVm,&pFunc->aByteCode);
	/* Compile the body */
	PH7_CompileBlock(&(*pGen),0);
	/* Fix exception jumps now the destination is resolved */
	GenStateFixJumps(pGen->pCurrent,PH7_OP_THROW,PH7_VmInstrLength(pGen->pVm));
	/* Emit the final return if not yet done */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,0,0,0,0);
	/* Fix gotos jumps now the destination is resolved */
	if( SXERR_ABORT == GenStateFixGoto(&(*pGen),nGotoOfft) ){
		rc = SXERR_ABORT;
	}
	SySetTruncate(&pGen->aGoto,nGotoOfft);
	/* Restore the default container */
	PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer);
	/* Leave function block */
	GenStateLeaveBlock(&(*pGen),0);
	if( rc == SXERR_ABORT ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_ABORT;
	}
	/* All done, function body compiled */
	return SXRET_OK;
}
/*
 * Compile a PHP function whether is a Standard or Annonymous function.
 * According to the PHP language reference manual.
 *  Function names follow the same rules as other labels in PHP. A valid function name
 *  starts with a letter or underscore, followed by any number of letters, numbers, or
 *  underscores. As a regular expression, it would be expressed thus:
 *     [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*. 
 *  Functions need not be defined before they are referenced.
 *  All functions and classes in PHP have the global scope - they can be called outside
 *  a function even if they were defined inside and vice versa.
 *  It is possible to call recursive functions in PHP. However avoid recursive function/method
 *  calls with over 32-64 recursion levels. 
 * 
 * PH7 have introduced powerful extension including full type hinting, function overloading, 
 * complex agrument values and more. Please refer to the official documentation for more information
 * on these extension.
 */
static sxi32 GenStateCompileFunc(
	ph7_gen_state *pGen, /* Code generator state */
	SyString *pName,     /* Function name. NULL otherwise */
	sxi32 iFlags,        /* Control flags */
	int bHandleClosure,  /* TRUE if we are dealing with a closure */
	ph7_vm_func **ppFunc /* OUT: function state */
	)
{
	ph7_vm_func *pFunc;
	SyToken *pEnd;
	sxu32 nLine;
	char *zName;
	sxi32 rc;
	/* Extract line number */
	nLine = pGen->pIn->nLine;
	/* Jump the left parenthesis '(' */
	pGen->pIn++;
	/* Delimit the function signature */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pEnd >= pGen->pEnd ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Missing ')' after function '%z' signature",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		pGen->pIn = pGen->pEnd;
		return SXRET_OK;
	}
	/* Create the function state */
	pFunc = (ph7_vm_func *)SyMemBackendPoolAlloc(&pGen->pVm->sAllocator,sizeof(ph7_vm_func));
	if( pFunc == 0 ){
		goto OutOfMem;
	}
	/* function ID */
	zName = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
	if( zName == 0 ){
		/* Don't worry about freeing memory, everything will be released shortly */
		goto OutOfMem;
	}
	/* Initialize the function state */
	PH7_VmInitFuncState(pGen->pVm,pFunc,zName,pName->nByte,iFlags,0);
	if( pGen->pIn < pEnd ){
		/* Collect function arguments */
		rc = GenStateCollectFuncArgs(pFunc,&(*pGen),pEnd);
		if( rc == SXERR_ABORT ){
			/* Don't worry about freeing memory, everything will be released shortly */
			return SXERR_ABORT;
		}
	}
	/* Compile function body */
	pGen->pIn = &pEnd[1];
	if( bHandleClosure ){
		ph7_vm_func_closure_env sEnv;
		int got_this = 0; /* TRUE if $this have been seen */
		if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) 
			&& SX_PTR_TO_INT(pGen->pIn->pUserData) == PH7_TKWRD_USE ){
				sxu32 nLine = pGen->pIn->nLine;
				/* Closure,record environment variable */
				pGen->pIn++;
				if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
					rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Closure: Unexpected token. Expecting a left parenthesis '('");
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
				}
				pGen->pIn++; /* Jump the left parenthesis or any other unexpected token */
				/* Compile until we hit the first closing parenthesis */
				while( pGen->pIn < pGen->pEnd ){
					int iFlags = 0;
					if( pGen->pIn->nType & PH7_TK_RPAREN ){
						pGen->pIn++; /* Jump the closing parenthesis */
						break;
					}
					nLine = pGen->pIn->nLine;
					if( pGen->pIn->nType & PH7_TK_AMPER ){
						/* Pass by reference,record that */
						PH7_GenCompileError(pGen,E_WARNING,nLine,
							"Closure: Pass by reference is disabled in the current release of the PH7 engine,PH7 is switching to pass by value"
							);
						iFlags = VM_FUNC_ARG_BY_REF;
						pGen->pIn++;
					}
					if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR) == 0 || &pGen->pIn[1] >= pGen->pEnd
						|| (pGen->pIn[1].nType & (PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
							rc = PH7_GenCompileError(pGen,E_ERROR,nLine,
								"Closure: Unexpected token. Expecting a variable name");
							if( rc == SXERR_ABORT ){
								return SXERR_ABORT;
							}
							/* Find the closing parenthesis */
							while( (pGen->pIn < pGen->pEnd) && (pGen->pIn->nType & PH7_TK_RPAREN) == 0 ){
								pGen->pIn++;
							}
							if(pGen->pIn < pGen->pEnd){
								pGen->pIn++;
							}
							break;
							/* TICKET 1433-95: No need for the else block below.*/
					}else{
						SyString *pName; 
						char *zDup;
						/* Duplicate variable name */
						pName = &pGen->pIn[1].sData;
						zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
						if( zDup ){
							/* Zero the structure */
							SyZero(&sEnv,sizeof(ph7_vm_func_closure_env));
							sEnv.iFlags = iFlags;
							PH7_MemObjInit(pGen->pVm,&sEnv.sValue);
							SyStringInitFromBuf(&sEnv.sName,zDup,pName->nByte);
							if( !got_this && pName->nByte == sizeof("this")-1 && 
								SyMemcmp((const void *)zDup,(const void *)"this",sizeof("this")-1) == 0 ){
									got_this = 1;
							}
							/* Save imported variable */
							SySetPut(&pFunc->aClosureEnv,(const void *)&sEnv);
						}else{
							 PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
							 return SXERR_ABORT;
						}
					}
					pGen->pIn += 2; /* $ + variable name or any other unexpected token */
					while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_COMMA /*','*/) ){
						/* Ignore trailing commas */
						pGen->pIn++;
					}
				}
				if( !got_this ){
					/* Make the $this variable [Current processed Object (class instance)]  
					 * available to the closure environment.
					 */
					SyZero(&sEnv,sizeof(ph7_vm_func_closure_env));
					sEnv.iFlags = VM_FUNC_ARG_IGNORE; /* Do not install if NULL */
					PH7_MemObjInit(pGen->pVm,&sEnv.sValue);
					SyStringInitFromBuf(&sEnv.sName,"this",sizeof("this")-1);
					SySetPut(&pFunc->aClosureEnv,(const void *)&sEnv);
				}
				if( SySetUsed(&pFunc->aClosureEnv) > 0 ){
					/* Mark as closure */
					pFunc->iFlags |= VM_FUNC_CLOSURE;
				}
		}
	}
	/* Compile the body */
	rc = GenStateCompileFuncBody(&(*pGen),pFunc);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	if( ppFunc ){
		*ppFunc = pFunc;
	}
	rc = SXRET_OK;
	if( (pFunc->iFlags & VM_FUNC_CLOSURE) == 0 ){
		/* Finally register the function */
		rc = PH7_VmInstallUserFunction(pGen->pVm,pFunc,0);
	}
	if( rc == SXRET_OK ){
		return SXRET_OK;
	}
	/* Fall through if something goes wrong */
OutOfMem:
	/* If the supplied memory subsystem is so sick that we are unable to allocate
	 * a tiny chunk of memory, there is no much we can do here.
	 */
	PH7_GenCompileError(&(*pGen),E_ERROR,1,"Fatal, PH7 engine is running out-of-memory");
	return SXERR_ABORT;
}
/*
 * Compile a standard PHP function.
 *  Refer to the block-comment above for more information.
 */
static sxi32 PH7_CompileFunction(ph7_gen_state *pGen)
{
	SyString *pName;
	sxi32 iFlags;
	sxu32 nLine;
	sxi32 rc;

	nLine = pGen->pIn->nLine;
	pGen->pIn++; /* Jump the 'function' keyword */
	iFlags = 0;
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_AMPER) ){
		/* Return by reference,remember that */
		iFlags |= VM_FUNC_REF_RETURN;
		/* Jump the '&' token */
		pGen->pIn++;
	}
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
		/* Invalid function name */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Invalid function name");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		/* Sychronize with the next semi-colon or braces*/
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI|PH7_TK_OCB)) == 0 ){
			pGen->pIn++;
		}
		return SXRET_OK;
	}
	pName = &pGen->pIn->sData;
	nLine = pGen->pIn->nLine;
	/* Jump the function name */
	pGen->pIn++;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '(' after function name '%z'",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		/* Sychronize with the next semi-colon or '{' */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI|PH7_TK_OCB)) == 0 ){
			pGen->pIn++;
		}
		return SXRET_OK;
	}
	/* Compile function body */
	rc = GenStateCompileFunc(&(*pGen),pName,iFlags,FALSE,0);
	return rc;
}
/*
 * Extract the visibility level associated with a given keyword.
 * According to the PHP language reference manual
 *  Visibility:
 *  The visibility of a property or method can be defined by prefixing
 *  the declaration with the keywords public, protected or private.
 *  Class members declared public can be accessed everywhere.
 *  Members declared protected can be accessed only within the class
 *  itself and by inherited and parent classes. Members declared as private
 *  may only be accessed by the class that defines the member. 
 */
static sxi32 GetProtectionLevel(sxi32 nKeyword)
{
	if( nKeyword == PH7_TKWRD_PRIVATE ){
		return PH7_CLASS_PROT_PRIVATE;
	}else if( nKeyword == PH7_TKWRD_PROTECTED ){
		return PH7_CLASS_PROT_PROTECTED;
	}
	/* Assume public by default */
	return PH7_CLASS_PROT_PUBLIC;
}
/*
 * Compile a class constant.
 * According to the PHP language reference manual
 *  Class Constants
 *   It is possible to define constant values on a per-class basis remaining 
 *   the same and unchangeable. Constants differ from normal variables in that
 *   you don't use the $ symbol to declare or use them.
 *   The value must be a constant expression, not (for example) a variable,
 *   a property, a result of a mathematical operation, or a function call.
 *   It's also possible for interfaces to have constants. 
 * Symisc eXtension.
 *  PH7 allow any complex expression to be associated with the constant while
 *  the zend engine would allow only simple scalar value.
 *  Example: 
 *   class Test{
 *        const MyConst = "Hello"."world: ".rand_str(3); //concatenation operation + Function call
 *   };
 *   var_dump(TEST::MyConst);
 *   Refer to the official documentation for more information on the powerful extension
 *   introduced by the PH7 engine to the OO subsystem.
 */
static sxi32 GenStateCompileClassConstant(ph7_gen_state *pGen,sxi32 iProtection,sxi32 iFlags,ph7_class *pClass)
{
	sxu32 nLine = pGen->pIn->nLine;
	SySet *pInstrContainer;
	ph7_class_attr *pCons;
	SyString *pName;
	sxi32 rc;
	/* Extract visibility level */
	iProtection = GetProtectionLevel(iProtection);
	pGen->pIn++; /* Jump the 'const' keyword */
loop:
	/* Mark as constant */
	iFlags |= PH7_CLASS_ATTR_CONSTANT;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0 ){
		/* Invalid constant name */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Invalid constant name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Peek constant name */
	pName = &pGen->pIn->sData;
	/* Make sure the constant name isn't reserved */
	if( GenStateIsReservedConstant(pName) ){
		/* Reserved constant name */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Cannot redeclare a reserved constant '%z'",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Advance the stream cursor */
	pGen->pIn++;
	if(pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_EQUAL /* '=' */) == 0 ){
		/* Invalid declaration */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '=' after class constant %z'",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	pGen->pIn++; /* Jump the equal sign */
	/* Allocate a new class attribute */
	pCons = PH7_NewClassAttr(pGen->pVm,pName,nLine,iProtection,iFlags);
	if( pCons == 0 ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	/* Swap bytecode container */
	pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
	PH7_VmSetByteCodeContainer(pGen->pVm,&pCons->aByteCode);
	/* Compile constant value.
	 */
	rc = PH7_CompileExpr(&(*pGen),EXPR_FLAG_COMMA_STATEMENT,0);
	if( rc == SXERR_EMPTY ){
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Empty constant '%z' value",pName);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* Emit the done instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,1,0,0,0);
	PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer); 
	if( rc == SXERR_ABORT ){
		/* Don't worry about freeing memory, everything will be released shortly */
		return SXERR_ABORT;
	}
	/* All done,install the constant */
	rc = PH7_ClassInstallAttr(pClass,pCons);
	if( rc != SXRET_OK ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_COMMA /*','*/) ){
		/* Multiple constants declarations [i.e: const min=-1,max = 10] */
		pGen->pIn++; /* Jump the comma */
		if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0 ){
			SyToken *pTok = pGen->pIn;
			if( pTok >= pGen->pEnd ){
				pTok--;
			}
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
				"Unexpected token '%z',expecting constant declaration inside class '%z'",
				&pTok->sData,&pClass->sName);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}else{
			if( pGen->pIn->nType & PH7_TK_ID ){
				goto loop;
			}
		}
	}
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon */
	while(pGen->pIn < pGen->pEnd && ((pGen->pIn->nType & PH7_TK_SEMI/*';'*/) == 0) ){
		pGen->pIn++;
	}
	return SXERR_CORRUPT;
}
/*
 * complie a class attribute or Properties in the PHP jargon.
 * According to the PHP language reference manual
 *  Properties
 *  Class member variables are called "properties". You may also see them referred
 *  to using other terms such as "attributes" or "fields", but for the purposes
 *  of this reference we will use "properties". They are defined by using one
 *  of the keywords public, protected, or private, followed by a normal variable
 *  declaration. This declaration may include an initialization, but this initialization
 *  must be a constant value--that is, it must be able to be evaluated at compile time
 *  and must not depend on run-time information in order to be evaluated. 
 * Symisc eXtension.
 *  PH7 allow any complex expression to be associated with the attribute while
 *  the zend engine would allow only simple scalar value.
 *  Example: 
 *   class Test{
 *        public static $myVar = "Hello"."world: ".rand_str(3); //concatenation operation + Function call
 *   };
 *   var_dump(TEST::myVar);
 *   Refer to the official documentation for more information on the powerful extension
 *   introduced by the PH7 engine to the OO subsystem.
 */
static sxi32 GenStateCompileClassAttr(ph7_gen_state *pGen,sxi32 iProtection,sxi32 iFlags,ph7_class *pClass)
{
	sxu32 nLine = pGen->pIn->nLine;
	ph7_class_attr *pAttr;
	SyString *pName;
	sxi32 rc;
	/* Extract visibility level */
	iProtection = GetProtectionLevel(iProtection);
loop:
	pGen->pIn++; /* Jump the dollar sign */
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_KEYWORD|PH7_TK_ID)) == 0 ){
		/* Invalid attribute name */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Invalid attribute name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Peek attribute name */
	pName = &pGen->pIn->sData;
	/* Advance the stream cursor */
	pGen->pIn++;
	if(pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_EQUAL/*'='*/|PH7_TK_SEMI/*';'*/|PH7_TK_COMMA/*','*/)) == 0 ){
		/* Invalid declaration */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '=' or ';' after attribute name '%z'",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Allocate a new class attribute */
	pAttr = PH7_NewClassAttr(pGen->pVm,pName,nLine,iProtection,iFlags);
	if( pAttr == 0 ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 engine is running out of memory");
		return SXERR_ABORT;
	}
	if( pGen->pIn->nType & PH7_TK_EQUAL /*'='*/ ){
		SySet *pInstrContainer;
		pGen->pIn++; /*Jump the equal sign */
		/* Swap bytecode container */
		pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
		PH7_VmSetByteCodeContainer(pGen->pVm,&pAttr->aByteCode);
		/* Compile attribute value.
		 */
		rc = PH7_CompileExpr(&(*pGen),EXPR_FLAG_COMMA_STATEMENT,0);
		if( rc == SXERR_EMPTY ){
			rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Attribute '%z': Missing default value",pName);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		/* Emit the done instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,1,0,0,0);
		PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer);
	}
	/* All done,install the attribute */
	rc = PH7_ClassInstallAttr(pClass,pAttr);
	if( rc != SXRET_OK ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_COMMA /*','*/) ){
		/* Multiple attribute declarations [i.e: public $var1,$var2=5<<1,$var3] */
		pGen->pIn++; /* Jump the comma */
		if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR/*'$'*/) == 0 ){
			SyToken *pTok = pGen->pIn;
			if( pTok >= pGen->pEnd ){
				pTok--;
			}
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
				"Unexpected token '%z',expecting attribute declaration inside class '%z'",
				&pTok->sData,&pClass->sName);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}else{
			if( pGen->pIn->nType & PH7_TK_DOLLAR ){
				goto loop;
			}
		}
	}
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon */
	while(pGen->pIn < pGen->pEnd && ((pGen->pIn->nType & PH7_TK_SEMI/*';'*/) == 0) ){
		pGen->pIn++;
	}
	return SXERR_CORRUPT;
}
/*
 * Compile a class method.
 *
 * Refer to the official documentation for more information
 * on the powerful extension introduced by the PH7 engine
 * to the OO subsystem such as full type hinting,method 
 * overloading and many more.
 */
static sxi32 GenStateCompileClassMethod(
	ph7_gen_state *pGen, /* Code generator state */
	sxi32 iProtection,   /* Visibility level */
	sxi32 iFlags,        /* Configuration flags */
	int doBody,          /* TRUE to process method body */
	ph7_class *pClass    /* Class this method belongs */
	)
{
	sxu32 nLine = pGen->pIn->nLine;
	ph7_class_method *pMeth;
	sxi32 iFuncFlags;
	SyString *pName;
	SyToken *pEnd;
	sxi32 rc;
	/* Extract visibility level */
	iProtection = GetProtectionLevel(iProtection);
	pGen->pIn++; /* Jump the 'function' keyword */
	iFuncFlags = 0;
	if( pGen->pIn >= pGen->pEnd ){
		/* Invalid method name */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Invalid method name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_AMPER) ){
		/* Return by reference,remember that */
		iFuncFlags |= VM_FUNC_REF_RETURN;
		/* Jump the '&' token */
		pGen->pIn++;
	}
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_ID)) == 0 ){
		/* Invalid method name */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Invalid method name");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Peek method name */
	pName = &pGen->pIn->sData;
	nLine = pGen->pIn->nLine;
	/* Jump the method name */
	pGen->pIn++;
	if( iFlags & PH7_CLASS_ATTR_ABSTRACT ){
		/* Abstract method */
		if( iProtection == PH7_CLASS_PROT_PRIVATE ){
			rc = PH7_GenCompileError(pGen,E_ERROR,nLine,
				"Access type for abstract method '%z::%z' cannot be 'private'",
				&pClass->sName,pName);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
		}
		/* Assemble method signature only */
		doBody = FALSE;
	}
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '(' after method name '%z'",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Allocate a new class_method instance */
	pMeth = PH7_NewClassMethod(pGen->pVm,pClass,pName,nLine,iProtection,iFlags,iFuncFlags);
	if( pMeth == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	/* Jump the left parenthesis '(' */
	pGen->pIn++;
	pEnd = 0; /* cc warning */
	/* Delimit the method signature */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pEnd >= pGen->pEnd ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Missing ')' after method '%z' declaration",pName);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	if( pGen->pIn < pEnd ){
		/* Collect method arguments */
		rc = GenStateCollectFuncArgs(&pMeth->sFunc,&(*pGen),pEnd);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	/* Point beyond method signature */
	pGen->pIn = &pEnd[1];
	if( doBody ){
		/* Compile method body */
		rc = GenStateCompileFuncBody(&(*pGen),&pMeth->sFunc);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}else{
		/* Only method signature is allowed */
		if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI /* ';'*/) == 0 ){
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
				"Expected ';' after method signature '%z'",pName);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
				return SXERR_CORRUPT;
			}
	}
	/* All done,install the method */
	rc = PH7_ClassInstallMethod(pClass,pMeth);
	if( rc != SXRET_OK ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon */
	while(pGen->pIn < pGen->pEnd && ((pGen->pIn->nType & PH7_TK_SEMI/*';'*/) == 0) ){
		pGen->pIn++;
	}
	return SXERR_CORRUPT;
}
/*
 * Compile an object interface.
 *  According to the PHP language reference manual
 *   Object Interfaces:
 *   Object interfaces allow you to create code which specifies which methods
 *   a class must implement, without having to define how these methods are handled.
 *   Interfaces are defined using the interface keyword, in the same way as a standard
 *   class, but without any of the methods having their contents defined.
 *   All methods declared in an interface must be public, this is the nature of an interface. 
 */
static sxi32 PH7_CompileClassInterface(ph7_gen_state *pGen)
{
	sxu32 nLine = pGen->pIn->nLine;
	ph7_class *pClass,*pBase;
	SyToken *pEnd,*pTmp;
	SyString *pName;
	sxi32 nKwrd;
	sxi32 rc;
	/* Jump the 'interface' keyword */
	pGen->pIn++;
	/* Extract interface name */
	pName = &pGen->pIn->sData;
	/* Advance the stream cursor */
	pGen->pIn++;
	/* Obtain a raw class */
	pClass = PH7_NewRawClass(pGen->pVm,pName,nLine);
	if( pClass == 0 ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	/* Mark as an interface */
	pClass->iFlags = PH7_CLASS_INTERFACE;
	/* Assume no base class is given */
	pBase = 0;
	if( pGen->pIn < pGen->pEnd  && (pGen->pIn->nType & PH7_TK_KEYWORD) ){
		nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
		if( nKwrd == PH7_TKWRD_EXTENDS /* interface b extends a */ ){
			SyString *pBaseName;
			/* Extract base interface */
			pGen->pIn++;
			if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0 ){
				/* Syntax error */
				rc = PH7_GenCompileError(pGen,E_ERROR,nLine,
					"Expected 'interface_name' after 'extends' keyword inside interface '%z'",
					pName);
				SyMemBackendPoolFree(&pGen->pVm->sAllocator,pClass);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
				return SXRET_OK;
			}
			pBaseName = &pGen->pIn->sData;
			pBase = PH7_VmExtractClass(pGen->pVm,pBaseName->zString,pBaseName->nByte,FALSE,0);
			/* Only interfaces is allowed */
			while( pBase && (pBase->iFlags & PH7_CLASS_INTERFACE) == 0 ){
				pBase = pBase->pNextName;
			}
			if( pBase == 0 ){
				/* Inexistant interface */
				rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"Inexistant base interface '%z'",pBaseName);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
			}
			/* Advance the stream cursor */
			pGen->pIn++;
		}
	}
	if( pGen->pIn >= pGen->pEnd  || (pGen->pIn->nType & PH7_TK_OCB /*'{'*/) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '{' after interface '%z' definition",pName);
		SyMemBackendPoolFree(&pGen->pVm->sAllocator,pClass);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	pGen->pIn++; /* Jump the leading curly brace */
	pEnd = 0; /* cc warning */
	/* Delimit the interface body */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_OCB/*'{'*/,PH7_TK_CCB/*'}'*/,&pEnd);
	if( pEnd >= pGen->pEnd ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Missing '}' after interface '%z' definition",pName);
		SyMemBackendPoolFree(&pGen->pVm->sAllocator,pClass);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	/* Swap token stream */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	/* Start the parse process 
	 * Note (According to the PHP reference manual):
	 *  Only constants and function signatures(without body) are allowed.
	 *  Only 'public' visibility is allowed.
	 */
	for(;;){
		/* Jump leading/trailing semi-colons */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI/*';'*/) ){
			pGen->pIn++;
		}
		if( pGen->pIn >= pGen->pEnd ){
			/* End of interface body */
			break;
		}
		if( (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 ){
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
				"Unexpected token '%z'.Expecting method signature or constant declaration inside interface '%z'",
				&pGen->pIn->sData,pName);
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			goto done;
		}
		/* Extract the current keyword */
		nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
		if( nKwrd == PH7_TKWRD_PRIVATE || nKwrd == PH7_TKWRD_PROTECTED ){
			/* Emit a warning and switch to public visibility */
			PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn->nLine,"interface: Access type must be public");
			nKwrd = PH7_TKWRD_PUBLIC;
		}
		if( nKwrd != PH7_TKWRD_PUBLIC && nKwrd != PH7_TKWRD_FUNCTION && nKwrd != PH7_TKWRD_CONST && nKwrd != PH7_TKWRD_STATIC ){
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
				"Expecting method signature or constant declaration inside interface '%z'",pName);
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			goto done;
		}
		if( nKwrd == PH7_TKWRD_PUBLIC ){
			/* Advance the stream cursor */
			pGen->pIn++;
			if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 ){
				rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
					"Expecting method signature inside interface '%z'",pName);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
				goto done;
			}
			nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
			if( nKwrd != PH7_TKWRD_FUNCTION && nKwrd != PH7_TKWRD_CONST && nKwrd != PH7_TKWRD_STATIC ){
				rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
					"Expecting method signature or constant declaration inside interface '%z'",pName);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
				goto done;
			}
		}
		if( nKwrd == PH7_TKWRD_CONST ){
			/* Parse constant */
			rc = GenStateCompileClassConstant(&(*pGen),0,0,pClass);
			if( rc != SXRET_OK ){
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				goto done;
			}
		}else{
			sxi32 iFlags = 0;
			if( nKwrd == PH7_TKWRD_STATIC ){
				/* Static method,record that */
				iFlags |= PH7_CLASS_ATTR_STATIC;
				/* Advance the stream cursor */
				pGen->pIn++;
				if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 
					|| SX_PTR_TO_INT(pGen->pIn->pUserData) != PH7_TKWRD_FUNCTION ){
						rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
							"Expecting method signature inside interface '%z'",pName);
						if( rc == SXERR_ABORT ){
							/* Error count limit reached,abort immediately */
							return SXERR_ABORT;
						}
						goto done;
				}
			}
			/* Process method signature */
			rc = GenStateCompileClassMethod(&(*pGen),0,FALSE/* Only method signature*/,iFlags,pClass);
			if( rc != SXRET_OK ){
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				goto done;
			}
		}
	}
	/* Install the interface */
	rc = PH7_VmInstallClass(pGen->pVm,pClass);
	if( rc == SXRET_OK && pBase ){
		/* Inherit from the base interface */
		rc = PH7_ClassInterfaceInherit(pClass,pBase);
	}
	if( rc != SXRET_OK ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
done:
	/* Point beyond the interface body */
	pGen->pIn  = &pEnd[1];
	pGen->pEnd = pTmp;
	return PH7_OK;
}
/*
 * Compile a user-defined class.
 * According to the PHP language reference manual
 *  class
 *  Basic class definitions begin with the keyword class, followed by a class
 *  name, followed by a pair of curly braces which enclose the definitions
 *  of the properties and methods belonging to the class.
 *  The class name can be any valid label which is a not a PHP reserved word.
 *  A valid class name starts with a letter or underscore, followed by any number
 *  of letters, numbers, or underscores. As a regular expression, it would be expressed
 *  thus: [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*.
 *  A class may contain its own constants, variables (called "properties"), and functions
 *  (called "methods"). 
 */
static sxi32 GenStateCompileClass(ph7_gen_state *pGen,sxi32 iFlags)
{
	sxu32 nLine = pGen->pIn->nLine;
	ph7_class *pClass,*pBase;
	SyToken *pEnd,*pTmp;
	sxi32 iProtection;
	SySet aInterfaces;
	sxi32 iAttrflags;
	SyString *pName;
	sxi32 nKwrd;
	sxi32 rc;
	/* Jump the 'class' keyword */
	pGen->pIn++;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Invalid class name");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		/* Synchronize with the first semi-colon or curly braces */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_OCB/*'{'*/|PH7_TK_SEMI/*';'*/)) == 0 ){
			pGen->pIn++;
		}
		return SXRET_OK;
	}
	/* Extract class name */
	pName = &pGen->pIn->sData;
	/* Advance the stream cursor */
	pGen->pIn++;
	/* Obtain a raw class */
	pClass = PH7_NewRawClass(pGen->pVm,pName,nLine);
	if( pClass == 0 ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
	/* implemented interfaces container */
	SySetInit(&aInterfaces,&pGen->pVm->sAllocator,sizeof(ph7_class *));
	/* Assume a standalone class */
	pBase = 0;
	if( pGen->pIn < pGen->pEnd  && (pGen->pIn->nType & PH7_TK_KEYWORD) ){
		SyString *pBaseName;
		nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
		if( nKwrd == PH7_TKWRD_EXTENDS /* class b extends a */ ){
			pGen->pIn++; /* Advance the stream cursor */
			if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0 ){
				/* Syntax error */
				rc = PH7_GenCompileError(pGen,E_ERROR,nLine,
					"Expected 'class_name' after 'extends' keyword inside class '%z'",
					pName);
				SyMemBackendPoolFree(&pGen->pVm->sAllocator,pClass);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
				return SXRET_OK;
			}
			/* Extract base class name */
			pBaseName = &pGen->pIn->sData;
			/* Perform the query */
			pBase = PH7_VmExtractClass(pGen->pVm,pBaseName->zString,pBaseName->nByte,FALSE,0);
			/* Interfaces are not allowed */
			while( pBase && (pBase->iFlags & PH7_CLASS_INTERFACE) ){
				pBase = pBase->pNextName;
			}
			if( pBase == 0 ){
				/* Inexistant base class */
				rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"Inexistant base class '%z'",pBaseName);
				if( rc == SXERR_ABORT ){
					/* Error count limit reached,abort immediately */
					return SXERR_ABORT;
				}
			}else{
				if( pBase->iFlags & PH7_CLASS_FINAL ){
					rc = PH7_GenCompileError(pGen,E_ERROR,nLine,
						"Class '%z' may not inherit from final class '%z'",pName,&pBase->sName);
					if( rc == SXERR_ABORT ){
						/* Error count limit reached,abort immediately */
						return SXERR_ABORT;
					}
				}
			}
			/* Advance the stream cursor */
			pGen->pIn++;
		}
		if (pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) && SX_PTR_TO_INT(pGen->pIn->pUserData) == PH7_TKWRD_IMPLEMENTS ){
			ph7_class *pInterface;
			SyString *pIntName;
			/* Interface implementation */
			pGen->pIn++; /* Advance the stream cursor */
			for(;;){
				if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0 ){
					/* Syntax error */
					rc = PH7_GenCompileError(pGen,E_ERROR,nLine,
						"Expected 'interface_name' after 'implements' keyword inside class '%z' declaration",
						pName);
					if( rc == SXERR_ABORT ){
						/* Error count limit reached,abort immediately */
						return SXERR_ABORT;
					}
					break;
				}
				/* Extract interface name */
				pIntName = &pGen->pIn->sData;
				/* Make sure the interface is already defined */
				pInterface = PH7_VmExtractClass(pGen->pVm,pIntName->zString,pIntName->nByte,FALSE,0);
				/* Only interfaces are allowed */
				while( pInterface && (pInterface->iFlags & PH7_CLASS_INTERFACE) == 0 ){
					pInterface = pInterface->pNextName;
				}
				if( pInterface == 0 ){
					/* Inexistant interface */
					rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"Inexistant base interface '%z'",pIntName);
					if( rc == SXERR_ABORT ){
						/* Error count limit reached,abort immediately */
						return SXERR_ABORT;
					}
				}else{
					/* Register interface */
					SySetPut(&aInterfaces,(const void *)&pInterface);
				}
				/* Advance the stream cursor */
				pGen->pIn++;
				if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_COMMA) == 0 ){
					break;
				}
				pGen->pIn++;/* Jump the comma */
			}
		}
	}
	if( pGen->pIn >= pGen->pEnd  || (pGen->pIn->nType & PH7_TK_OCB /*'{'*/) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '{' after class '%z' declaration",pName);
		SyMemBackendPoolFree(&pGen->pVm->sAllocator,pClass);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	pGen->pIn++; /* Jump the leading curly brace */
	pEnd = 0; /* cc warning */
	/* Delimit the class body */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_OCB/*'{'*/,PH7_TK_CCB/*'}'*/,&pEnd);
	if( pEnd >= pGen->pEnd ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Missing closing braces'}' after class '%z' definition",pName);
		SyMemBackendPoolFree(&pGen->pVm->sAllocator,pClass);
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	/* Swap token stream */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	/* Set the inherited flags */
	pClass->iFlags = iFlags;
	/* Start the parse process */
	for(;;){
		/* Jump leading/trailing semi-colons */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI/*';'*/) ){
			pGen->pIn++;
		}
		if( pGen->pIn >= pGen->pEnd ){
			/* End of class body */
			break;
		}
		if( (pGen->pIn->nType & (PH7_TK_KEYWORD|PH7_TK_DOLLAR)) == 0 ){
			rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
				"Unexpected token '%z'. Expecting attribute declaration inside class '%z'",
				&pGen->pIn->sData,pName);
			if( rc == SXERR_ABORT ){
				/* Error count limit reached,abort immediately */
				return SXERR_ABORT;
			}
			goto done;
		}
		/* Assume public visibility */
		iProtection = PH7_TKWRD_PUBLIC;
		iAttrflags = 0;
		if( pGen->pIn->nType & PH7_TK_KEYWORD ){
			/* Extract the current keyword */
			nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
			if( nKwrd == PH7_TKWRD_PUBLIC || nKwrd == PH7_TKWRD_PRIVATE || nKwrd == PH7_TKWRD_PROTECTED ){
				iProtection = nKwrd;
				pGen->pIn++; /* Jump the visibility token */
				if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_KEYWORD|PH7_TK_DOLLAR)) == 0 ){
					rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
						"Unexpected token '%z'. Expecting attribute declaration inside class '%z'",
						&pGen->pIn->sData,pName);
					if( rc == SXERR_ABORT ){
						/* Error count limit reached,abort immediately */
						return SXERR_ABORT;
					}
					goto done;
				}
				if( pGen->pIn->nType & PH7_TK_DOLLAR ){
					/* Attribute declaration */
					rc = GenStateCompileClassAttr(&(*pGen),iProtection,iAttrflags,pClass);
					if( rc != SXRET_OK ){
						if( rc == SXERR_ABORT ){
							return SXERR_ABORT;
						}
						goto done;
					}
					continue;
				}
				/* Extract the keyword */
				nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
			}
			if( nKwrd == PH7_TKWRD_CONST ){
				/* Process constant declaration */
				rc = GenStateCompileClassConstant(&(*pGen),iProtection,iAttrflags,pClass);
				if( rc != SXRET_OK ){
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
					goto done;
				}
			}else{
				if( nKwrd == PH7_TKWRD_STATIC ){
					/* Static method or attribute,record that */
					iAttrflags |= PH7_CLASS_ATTR_STATIC;
					pGen->pIn++; /* Jump the static keyword */
					if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) ){
						/* Extract the keyword */
						nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
						if( nKwrd == PH7_TKWRD_PUBLIC || nKwrd == PH7_TKWRD_PRIVATE || nKwrd == PH7_TKWRD_PROTECTED ){
							iProtection = nKwrd;
							pGen->pIn++; /* Jump the visibility token */
						}
					}
					if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & (PH7_TK_KEYWORD|PH7_TK_DOLLAR)) == 0 ){
						rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
							"Unexpected token '%z',Expecting method,attribute or constant declaration inside class '%z'",
							&pGen->pIn->sData,pName);
						if( rc == SXERR_ABORT ){
							/* Error count limit reached,abort immediately */
							return SXERR_ABORT;
						}
						goto done;
					}
					if( pGen->pIn->nType & PH7_TK_DOLLAR ){
						/* Attribute declaration */
						rc = GenStateCompileClassAttr(&(*pGen),iProtection,iAttrflags,pClass);
						if( rc != SXRET_OK ){
							if( rc == SXERR_ABORT ){
								return SXERR_ABORT;
							}
							goto done;
						}
						continue;
					}
					/* Extract the keyword */
					nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
				}else if( nKwrd == PH7_TKWRD_ABSTRACT ){
					/* Abstract method,record that */
					iAttrflags |= PH7_CLASS_ATTR_ABSTRACT;
					/* Mark the whole class as abstract */
					pClass->iFlags |= PH7_CLASS_ABSTRACT;
					/* Advance the stream cursor */
					pGen->pIn++; 
					if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) ){
						nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
						if( nKwrd == PH7_TKWRD_PUBLIC || nKwrd == PH7_TKWRD_PRIVATE || nKwrd == PH7_TKWRD_PROTECTED ){
							iProtection = nKwrd;
							pGen->pIn++; /* Jump the visibility token */
						}
					}
					if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) && 
						SX_PTR_TO_INT(pGen->pIn->pUserData) == PH7_TKWRD_STATIC ){
							/* Static method */
							iAttrflags |= PH7_CLASS_ATTR_STATIC;
							pGen->pIn++; /* Jump the static keyword */
					}					
					if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 ||
						SX_PTR_TO_INT(pGen->pIn->pUserData) != PH7_TKWRD_FUNCTION ){
							rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
								"Unexpected token '%z',Expecting method declaration after 'abstract' keyword inside class '%z'",
								&pGen->pIn->sData,pName);
							if( rc == SXERR_ABORT ){
								/* Error count limit reached,abort immediately */
								return SXERR_ABORT;
							}
							goto done;
					}
					nKwrd = PH7_TKWRD_FUNCTION;
				}else if( nKwrd == PH7_TKWRD_FINAL ){
					/* final method ,record that */
					iAttrflags |= PH7_CLASS_ATTR_FINAL;
					pGen->pIn++; /* Jump the final keyword */
					if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) ){
						/* Extract the keyword */
						nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
						if( nKwrd == PH7_TKWRD_PUBLIC || nKwrd == PH7_TKWRD_PRIVATE || nKwrd == PH7_TKWRD_PROTECTED ){
							iProtection = nKwrd;
							pGen->pIn++; /* Jump the visibility token */
						}
					}
					if( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_KEYWORD) &&
						SX_PTR_TO_INT(pGen->pIn->pUserData) == PH7_TKWRD_STATIC ){
							/* Static method */
							iAttrflags |= PH7_CLASS_ATTR_STATIC;
							pGen->pIn++; /* Jump the static keyword */
					}
					if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 || 
						SX_PTR_TO_INT(pGen->pIn->pUserData) != PH7_TKWRD_FUNCTION ){
							rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
								"Unexpected token '%z',Expecting method declaration after 'final' keyword inside class '%z'",
								&pGen->pIn->sData,pName);
							if( rc == SXERR_ABORT ){
								/* Error count limit reached,abort immediately */
								return SXERR_ABORT;
							}
							goto done;
					}
					nKwrd = PH7_TKWRD_FUNCTION;
				}
				if( nKwrd != PH7_TKWRD_FUNCTION && nKwrd != PH7_TKWRD_VAR ){
					rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
						"Unexpected token '%z',Expecting method declaration inside class '%z'",
							&pGen->pIn->sData,pName);
						if( rc == SXERR_ABORT ){
							/* Error count limit reached,abort immediately */
							return SXERR_ABORT;
						}
						goto done;
				}
				if( nKwrd == PH7_TKWRD_VAR ){
					pGen->pIn++; /* Jump the 'var' keyword */
					if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR/*'$'*/) == 0){
						rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
							"Expecting attribute declaration after 'var' keyword");
						if( rc == SXERR_ABORT ){
							/* Error count limit reached,abort immediately */
							return SXERR_ABORT;
						}
						goto done;
					}
					/* Attribute declaration */
					rc = GenStateCompileClassAttr(&(*pGen),iProtection,iAttrflags,pClass);
				}else{
					/* Process method declaration */
					rc = GenStateCompileClassMethod(&(*pGen),iProtection,iAttrflags,TRUE,pClass);
				}
				if( rc != SXRET_OK ){
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
					goto done;
				}
			}
		}else{
			/* Attribute declaration */
			rc = GenStateCompileClassAttr(&(*pGen),iProtection,iAttrflags,pClass);
			if( rc != SXRET_OK ){
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				goto done;
			}
		}
	}
	/* Install the class */
	rc = PH7_VmInstallClass(pGen->pVm,pClass);
	if( rc == SXRET_OK ){
		ph7_class **apInterface;
		sxu32 n;
		if( pBase ){
			/* Inherit from base class and mark as a subclass */
			rc = PH7_ClassInherit(&(*pGen),pClass,pBase);
		}
		apInterface = (ph7_class **)SySetBasePtr(&aInterfaces);
		for( n = 0 ; n < SySetUsed(&aInterfaces) ; n++ ){
			/* Implements one or more interface */
			rc = PH7_ClassImplement(pClass,apInterface[n]);
			if( rc != SXRET_OK ){
				break;
			}
		}
	}
	SySetRelease(&aInterfaces);
	if( rc != SXRET_OK ){
		PH7_GenCompileError(pGen,E_ERROR,nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT;
	}
done:
	/* Point beyond the class body */
	pGen->pIn = &pEnd[1];
	pGen->pEnd = pTmp;
	return PH7_OK;
}
/*
 * Compile a user-defined abstract class.
 *  According to the PHP language reference manual
 *   PHP 5 introduces abstract classes and methods. Classes defined as abstract 
 *   may not be instantiated, and any class that contains at least one abstract
 *   method must also be abstract. Methods defined as abstract simply declare 
 *   the method's signature - they cannot define the implementation.
 *   When inheriting from an abstract class, all methods marked abstract in the parent's
 *   class declaration must be defined by the child; additionally, these methods must be
 *   defined with the same (or a less restricted) visibility. For example, if the abstract
 *   method is defined as protected, the function implementation must be defined as either
 *   protected or public, but not private. Furthermore the signatures of the methods must
 *   match, i.e. the type hints and the number of required arguments must be the same. 
 *   This also applies to constructors as of PHP 5.4. Before 5.4 constructor signatures
 *   could differ.
 */
static sxi32 PH7_CompileAbstractClass(ph7_gen_state *pGen)
{
	sxi32 rc;
	pGen->pIn++; /* Jump the 'abstract' keyword */
	rc = GenStateCompileClass(&(*pGen),PH7_CLASS_ABSTRACT);
	return rc;
}
/*
 * Compile a user-defined final class.
 *  According to the PHP language reference manual
 *    PHP 5 introduces the final keyword, which prevents child classes from overriding
 *    a method by prefixing the definition with final. If the class itself is being defined
 *    final then it cannot be extended. 
 */
static sxi32 PH7_CompileFinalClass(ph7_gen_state *pGen)
{
	sxi32 rc;
	pGen->pIn++; /* Jump the 'final' keyword */
	rc = GenStateCompileClass(&(*pGen),PH7_CLASS_FINAL);
	return rc;
}
/*
 * Compile a user-defined class.
 *  According to the PHP language reference manual
 *   Basic class definitions begin with the keyword class, followed
 *   by a class name, followed by a pair of curly braces which enclose
 *   the definitions of the properties and methods belonging to the class.
 *   A class may contain its own constants, variables (called "properties")
 *   and functions (called "methods"). 
 */
static sxi32 PH7_CompileClass(ph7_gen_state *pGen)
{
	sxi32 rc;
	rc = GenStateCompileClass(&(*pGen),0);
	return rc;
}
/*
 * Exception handling.
 *  According to the PHP language reference manual
 *    An exception can be thrown, and caught ("catched") within PHP. Code may be surrounded
 *    in a try block, to facilitate the catching of potential exceptions. Each try must have
 *    at least one corresponding catch block. Multiple catch blocks can be used to catch 
 *    different classes of exceptions. Normal execution (when no exception is thrown within
 *    the try block, or when a catch matching the thrown exception's class is not present) 
 *    will continue after that last catch block defined in sequence. Exceptions can be thrown
 *    (or re-thrown) within a catch block.
 *    When an exception is thrown, code following the statement will not be executed, and PHP
 *    will attempt to find the first matching catch block. If an exception is not caught, a PHP
 *    Fatal Error will be issued with an "Uncaught Exception ..." message, unless a handler has
 *    been defined with set_exception_handler().
 *    The thrown object must be an instance of the Exception class or a subclass of Exception.
 *    Trying to throw an object that is not will result in a PHP Fatal Error. 
 */
/*
 * Expression tree validator callback associated with the 'throw' statement.
 * Return SXRET_OK if the tree form a valid expression.Any other error
 * indicates failure.
 */
static sxi32 GenStateThrowNodeValidator(ph7_gen_state *pGen,ph7_expr_node *pRoot)
{
	sxi32 rc = SXRET_OK;
	if( pRoot->pOp ){
		if( pRoot->pOp->iOp != EXPR_OP_SUBSCRIPT /* $a[] */ && pRoot->pOp->iOp != EXPR_OP_NEW /* new Exception() */
			&& pRoot->pOp->iOp != EXPR_OP_ARROW /* -> */ && pRoot->pOp->iOp != EXPR_OP_DC /* :: */){
			/* Unexpected expression */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
				"throw: Expecting an exception class instance");
			if( rc != SXERR_ABORT ){
				rc = SXERR_INVALID;
			}
		}
	}else if( pRoot->xCode != PH7_CompileVariable ){
		/* Unexpected expression */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pRoot->pStart? pRoot->pStart->nLine : 0,
			"throw: Expecting an exception class instance");
		if( rc != SXERR_ABORT ){
			rc = SXERR_INVALID;
		}
	}
	return rc;
}
/*
 * Compile a 'throw' statement.
 * throw: This is how you trigger an exception.
 * Each "throw" block must have at least one "catch" block associated with it.
 */
static sxi32 PH7_CompileThrow(ph7_gen_state *pGen)
{
	sxu32 nLine = pGen->pIn->nLine;
	GenBlock *pBlock;
	sxu32 nIdx;
	sxi32 rc;
	pGen->pIn++; /* Jump the 'throw' keyword */
	/* Compile the expression */
	rc = PH7_CompileExpr(&(*pGen),0,GenStateThrowNodeValidator);
	if( rc == SXERR_EMPTY ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"throw: Expecting an exception class instance");
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		return SXRET_OK;
	}
	pBlock = pGen->pCurrent;
	/* Point to the top most function or try block and emit the forward jump */
	while(pBlock->pParent){
		if( pBlock->iFlags & (GEN_BLOCK_EXCEPTION|GEN_BLOCK_FUNC) ){
			break;
		}
		/* Point to the parent block */
		pBlock = pBlock->pParent;
	}
	/* Emit the throw instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_THROW,0,0,0,&nIdx);
	/* Emit the jump */
	GenStateNewJumpFixup(pBlock,PH7_OP_THROW,nIdx);
	return SXRET_OK;
}
/*
 * Compile a 'catch' block.
 * Catch: A "catch" block retrieves an exception and creates
 * an object containing the exception information.
 */
static sxi32 PH7_CompileCatch(ph7_gen_state *pGen,ph7_exception *pException)
{
	sxu32 nLine = pGen->pIn->nLine;
	ph7_exception_block sCatch;
	SySet *pInstrContainer;
	GenBlock *pCatch;
	SyToken *pToken;
	SyString *pName;
	char *zDup;
	sxi32 rc;
	pGen->pIn++; /* Jump the 'catch' keyword */
	/* Zero the structure */
	SyZero(&sCatch,sizeof(ph7_exception_block));
	/* Initialize fields */
	SySetInit(&sCatch.sByteCode,&pException->pVm->sAllocator,sizeof(VmInstr));
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 /*(*/ ||
		&pGen->pIn[1] >= pGen->pEnd || (pGen->pIn[1].nType & (PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
			/* Unexpected token,break immediately */
			pToken = pGen->pIn;
			if( pToken >= pGen->pEnd ){
				pToken--;
			}
			rc = PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,
				"Catch: Unexpected token '%z',excpecting class name",&pToken->sData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			return SXERR_INVALID;
	}
	/* Extract the exception class */
	pGen->pIn++; /* Jump the left parenthesis '(' */
	/* Duplicate class name */
	pName = &pGen->pIn->sData;
	zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
	if( zDup == 0 ){
		goto Mem;
	}
	SyStringInitFromBuf(&sCatch.sClass,zDup,pName->nByte);
	pGen->pIn++;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_DOLLAR) == 0 /*$*/ ||
		&pGen->pIn[1] >= pGen->pEnd || (pGen->pIn[1].nType & (PH7_TK_ID|PH7_TK_KEYWORD)) == 0 ){
			/* Unexpected token,break immediately */
			pToken = pGen->pIn;
			if( pToken >= pGen->pEnd ){
				pToken--;
			}
			rc = PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,
				"Catch: Unexpected token '%z',expecting variable name",&pToken->sData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			return SXERR_INVALID;
	}
	pGen->pIn++; /* Jump the dollar sign */
	/* Duplicate instance name */
	pName = &pGen->pIn->sData;
	zDup = SyMemBackendStrDup(&pGen->pVm->sAllocator,pName->zString,pName->nByte);
	if( zDup == 0 ){
		goto Mem;
	}
	SyStringInitFromBuf(&sCatch.sThis,zDup,pName->nByte);
	pGen->pIn++;
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_RPAREN) == 0 /*)*/ ){
		/* Unexpected token,break immediately */
		pToken = pGen->pIn;
		if( pToken >= pGen->pEnd ){
			pToken--;
		}
		rc = PH7_GenCompileError(pGen,E_ERROR,pToken->nLine,
			"Catch: Unexpected token '%z',expecting right parenthesis ')'",&pToken->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		return SXERR_INVALID;
	}
	/* Compile the block */
	pGen->pIn++; /* Jump the right parenthesis */
	/* Create the catch block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_EXCEPTION,PH7_VmInstrLength(pGen->pVm),0,&pCatch);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Swap bytecode container */
	pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
	PH7_VmSetByteCodeContainer(pGen->pVm,&sCatch.sByteCode);
	/* Compile the block */
	PH7_CompileBlock(&(*pGen),0);
	/* Fix forward jumps now the destination is resolved  */
	GenStateFixJumps(pCatch,-1,PH7_VmInstrLength(pGen->pVm));
	/* Emit the DONE instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,0,0,0,0);
	/* Leave the block */
	GenStateLeaveBlock(&(*pGen),0);
	/* Restore the default container */
	PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer);
	/* Install the catch block */
	rc = SySetPut(&pException->sEntry,(const void *)&sCatch);
	if( rc != SXRET_OK ){
		goto Mem;
	}
	return SXRET_OK;
Mem:
	PH7_GenCompileError(&(*pGen),E_ERROR,nLine,"Fatal, PH7 engine is running out of memory");
	return SXERR_ABORT;
}
/*
 * Compile a 'try' block.
 * A function using an exception should be in a "try" block.
 * If the exception does not trigger, the code will continue
 * as normal. However if the exception triggers, an exception
 * is "thrown".
 */
static sxi32 PH7_CompileTry(ph7_gen_state *pGen)
{
	ph7_exception *pException;
	GenBlock *pTry;
	sxu32 nJmpIdx;
	sxi32 rc;
	/* Create the exception container */
	pException = (ph7_exception *)SyMemBackendAlloc(&pGen->pVm->sAllocator,sizeof(ph7_exception));
	if( pException == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,
			pGen->pIn->nLine,"Fatal, PH7 engine is running out of memory");
		return SXERR_ABORT;
	}
	/* Zero the structure */
	SyZero(pException,sizeof(ph7_exception));
	/* Initialize fields */
	SySetInit(&pException->sEntry,&pGen->pVm->sAllocator,sizeof(ph7_exception_block));
	pException->pVm = pGen->pVm;
	/* Create the try block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_EXCEPTION,PH7_VmInstrLength(pGen->pVm),0,&pTry);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Emit the 'LOAD_EXCEPTION' instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_LOAD_EXCEPTION,0,0,pException,&nJmpIdx);
	/* Fix the jump later when the destination is resolved */
	GenStateNewJumpFixup(pTry,PH7_OP_LOAD_EXCEPTION,nJmpIdx);
	pGen->pIn++; /* Jump the 'try' keyword */
	/* Compile the block */
	rc = PH7_CompileBlock(&(*pGen),0);
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	/* Fix forward jumps now the destination is resolved */
	GenStateFixJumps(pTry,-1,PH7_VmInstrLength(pGen->pVm));
	/* Emit the 'POP_EXCEPTION' instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP_EXCEPTION,0,0,pException,0);
	/* Leave the block */
	GenStateLeaveBlock(&(*pGen),0);
	/* Compile the catch block */
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 || 
		SX_PTR_TO_INT(pGen->pIn->pUserData) != PH7_TKWRD_CATCH ){
			SyToken *pTok = pGen->pIn;
			if( pTok >= pGen->pEnd ){
				pTok--; /* Point back */
			}
			/* Unexpected token */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pTok->nLine,
				"Try: Unexpected token '%z',expecting 'catch' block",&pTok->sData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			return SXRET_OK;
	}
	/* Compile one or more catch blocks */
	for(;;){
		if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_KEYWORD) == 0
			|| SX_PTR_TO_INT(pGen->pIn->pUserData) != PH7_TKWRD_CATCH ){
				/* No more blocks */
				break;
		}
		/* Compile the catch block */
		rc = PH7_CompileCatch(&(*pGen),pException);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
 	}
	return SXRET_OK;
}
/*
 * Compile a switch block.
 *  (See block-comment below for more information)
 */
static sxi32 GenStateCompileSwitchBlock(ph7_gen_state *pGen,sxu32 iTokenDelim,sxu32 *pBlockStart)
{
	sxi32 rc = SXRET_OK;
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & (PH7_TK_SEMI/*';'*/|PH7_TK_COLON/*':'*/)) == 0 ){
		/* Unexpected token */
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Unexpected token '%z'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		pGen->pIn++;
	}
	pGen->pIn++;
	/* First instruction to execute in this block. */
	*pBlockStart = PH7_VmInstrLength(pGen->pVm);
	/* Compile the block until we hit a case/default/endswitch keyword
	 * or the '}' token */
	for(;;){
		if( pGen->pIn >= pGen->pEnd ){
			/* No more input to process */
			break;
		}
		rc = SXRET_OK;
		if( (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 ){
			if( pGen->pIn->nType & PH7_TK_CCB /*'}' */ ){
				if( iTokenDelim != PH7_TK_CCB ){
					/* Unexpected token */
					rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Unexpected token '%z'",
						&pGen->pIn->sData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
					/* FALL THROUGH */
				}
				rc = SXERR_EOF;
				break;
			}
		}else{
			sxi32 nKwrd;
			/* Extract the keyword */
			nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
			if( nKwrd == PH7_TKWRD_CASE || nKwrd == PH7_TKWRD_DEFAULT ){
				break;
			}
			if( nKwrd == PH7_TKWRD_ENDSWITCH /* endswitch; */){
				if( iTokenDelim != PH7_TK_KEYWORD ){
					/* Unexpected token */
					rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Unexpected token '%z'",
						&pGen->pIn->sData);
					if( rc == SXERR_ABORT ){
						return SXERR_ABORT;
					}
					/* FALL THROUGH */
				}
				/* Block compiled */
				break;
			}
		}
		/* Compile block */
		rc = PH7_CompileBlock(&(*pGen),0);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
	}
	return rc;
}
/*
 * Compile a case eXpression.
 *  (See block-comment below for more information)
 */
static sxi32 GenStateCompileCaseExpr(ph7_gen_state *pGen,ph7_case_expr *pExpr)
{
	SySet *pInstrContainer;
	SyToken *pEnd,*pTmp;
	sxi32 iNest = 0;
	sxi32 rc;
	/* Delimit the expression */
	pEnd = pGen->pIn;
	while( pEnd < pGen->pEnd ){
		if( pEnd->nType & PH7_TK_LPAREN /*(*/ ){
			/* Increment nesting level */
			iNest++;
		}else if( pEnd->nType & PH7_TK_RPAREN /*)*/ ){
			/* Decrement nesting level */
			iNest--;
		}else if( pEnd->nType & (PH7_TK_SEMI/*';'*/|PH7_TK_COLON/*;'*/) && iNest < 1 ){
			break;
		}
		pEnd++;
	}
	if( pGen->pIn >= pEnd ){
		rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,"Empty case expression");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
	}
	/* Swap token stream */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	pInstrContainer = PH7_VmGetByteCodeContainer(pGen->pVm);
	PH7_VmSetByteCodeContainer(pGen->pVm,&pExpr->aByteCode);
	rc = PH7_CompileExpr(&(*pGen),0,0);
	/* Emit the done instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,(rc != SXERR_EMPTY ? 1 : 0),0,0,0);
	PH7_VmSetByteCodeContainer(pGen->pVm,pInstrContainer); 
	/* Update token stream */
	pGen->pIn  = pEnd;
	pGen->pEnd = pTmp;
	if( rc == SXERR_ABORT ){
		return SXERR_ABORT;
	}
	return SXRET_OK;
}
/*
 * Compile the smart switch statement.
 * According to the PHP language reference manual
 *  The switch statement is similar to a series of IF statements on the same expression.
 *  In many occasions, you may want to compare the same variable (or expression) with many
 *  different values, and execute a different piece of code depending on which value it equals to.
 *  This is exactly what the switch statement is for.
 *  Note: Note that unlike some other languages, the continue statement applies to switch and acts
 *  similar to break. If you have a switch inside a loop and wish to continue to the next iteration
 *  of the outer loop, use continue 2. 
 *  Note that switch/case does loose comparision. 
 *  It is important to understand how the switch statement is executed in order to avoid mistakes.
 *  The switch statement executes line by line (actually, statement by statement).
 *  In the beginning, no code is executed. Only when a case statement is found with a value that
 *  matches the value of the switch expression does PHP begin to execute the statements.
 *  PHP continues to execute the statements until the end of the switch block, or the first time
 *  it sees a break statement. If you don't write a break statement at the end of a case's statement list.
 *  In a switch statement, the condition is evaluated only once and the result is compared to each
 *  case statement. In an elseif statement, the condition is evaluated again. If your condition
 *  is more complicated than a simple compare and/or is in a tight loop, a switch may be faster.
 *  The statement list for a case can also be empty, which simply passes control into the statement
 *  list for the next case. 
 *  The case expression may be any expression that evaluates to a simple type, that is, integer
 *  or floating-point numbers and strings.
 */
static sxi32 PH7_CompileSwitch(ph7_gen_state *pGen)
{
	GenBlock *pSwitchBlock;
	SyToken *pTmp,*pEnd;
	ph7_switch *pSwitch;
	sxu32 nToken;
	sxu32 nLine;
	sxi32 rc;
	nLine = pGen->pIn->nLine;
	/* Jump the 'switch' keyword */
	pGen->pIn++;    
	if( pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_LPAREN) == 0 ){
		/* Syntax error */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected '(' after 'switch' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
		goto Synchronize;
	}
	/* Jump the left parenthesis '(' */
	pGen->pIn++; 
	pEnd = 0; /* cc warning */
	/* Create the loop block */
	rc = GenStateEnterBlock(&(*pGen),GEN_BLOCK_LOOP|GEN_BLOCK_SWITCH,
		PH7_VmInstrLength(pGen->pVm),0,&pSwitchBlock);
	if( rc != SXRET_OK ){
		return SXERR_ABORT;
	}
	/* Delimit the condition */
	PH7_DelimitNestedTokens(pGen->pIn,pGen->pEnd,PH7_TK_LPAREN /* '(' */,PH7_TK_RPAREN /* ')' */,&pEnd);
	if( pGen->pIn == pEnd || pEnd >= pGen->pEnd ){
		/* Empty expression */
		rc = PH7_GenCompileError(pGen,E_ERROR,nLine,"Expected expression after 'switch' keyword");
		if( rc == SXERR_ABORT ){
			/* Error count limit reached,abort immediately */
			return SXERR_ABORT;
		}
	}
	/* Swap token streams */
	pTmp = pGen->pEnd;
	pGen->pEnd = pEnd;
	/* Compile the expression */
	rc = PH7_CompileExpr(&(*pGen),0,0);
	if( rc == SXERR_ABORT ){
		/* Expression handler request an operation abort [i.e: Out-of-memory] */
		return SXERR_ABORT;
	}
	/* Update token stream */
	while(pGen->pIn < pEnd ){
		rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,
			"Switch: Unexpected token '%z'",&pGen->pIn->sData);
		if( rc == SXERR_ABORT ){
			return SXERR_ABORT;
		}
		pGen->pIn++;
	}
	pGen->pIn  = &pEnd[1];
	pGen->pEnd = pTmp;
	if( pGen->pIn >= pGen->pEnd || &pGen->pIn[1] >= pGen->pEnd ||
		(pGen->pIn->nType & (PH7_TK_OCB/*'{'*/|PH7_TK_COLON/*:*/)) == 0 ){
			pTmp = pGen->pIn;
			if( pTmp >= pGen->pEnd ){
				pTmp--;
			}
			/* Unexpected token */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pTmp->nLine,"Switch: Unexpected token '%z'",&pTmp->sData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			goto Synchronize;
	}
	/* Set the delimiter token */
	if( pGen->pIn->nType & PH7_TK_COLON ){
		nToken = PH7_TK_KEYWORD;
		/* Stop compilation when the 'endswitch;' keyword is seen */
	}else{
		nToken = PH7_TK_CCB; /* '}' */
	}
	pGen->pIn++; /* Jump the leading curly braces/colons */
	/* Create the switch blocks container */
	pSwitch = (ph7_switch *)SyMemBackendAlloc(&pGen->pVm->sAllocator,sizeof(ph7_switch));
	if( pSwitch == 0 ){
		/* Abort compilation */
		PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Fatal, PH7 is running out of memory");
		return SXERR_ABORT; 
	}
	/* Zero the structure */
	SyZero(pSwitch,sizeof(ph7_switch));
	/* Initialize fields */
	SySetInit(&pSwitch->aCaseExpr,&pGen->pVm->sAllocator,sizeof(ph7_case_expr));
	/* Emit the switch instruction */
	PH7_VmEmitInstr(pGen->pVm,PH7_OP_SWITCH,0,0,pSwitch,0);
	/* Compile case blocks */
	for(;;){
		sxu32 nKwrd;
		if( pGen->pIn >= pGen->pEnd ){
			/* No more input to process */
			break;
		}
		if( (pGen->pIn->nType & PH7_TK_KEYWORD) == 0 ){
			if( nToken != PH7_TK_CCB || (pGen->pIn->nType & PH7_TK_CCB /*}*/) == 0 ){
				/* Unexpected token */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Switch: Unexpected token '%z'",
					&pGen->pIn->sData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				/* FALL THROUGH */
			}
			/* Block compiled */
			break;
		}
		/* Extract the keyword */
		nKwrd = SX_PTR_TO_INT(pGen->pIn->pUserData);
		if( nKwrd == PH7_TKWRD_ENDSWITCH /* endswitch; */){
			if( nToken != PH7_TK_KEYWORD ){
				/* Unexpected token */
				rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Switch: Unexpected token '%z'",
					&pGen->pIn->sData);
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
				/* FALL THROUGH */
			}
			/* Block compiled */
			break;
		}
		if( nKwrd == PH7_TKWRD_DEFAULT ){
			/*
			 * Accroding to the PHP language reference manual
			 *  A special case is the default case. This case matches anything
			 *  that wasn't matched by the other cases.
			 */
			if( pSwitch->nDefault > 0 ){
				/* Default case already compiled */ 
				rc = PH7_GenCompileError(&(*pGen),E_WARNING,pGen->pIn->nLine,"Switch: 'default' case already compiled");
				if( rc == SXERR_ABORT ){
					return SXERR_ABORT;
				}
			}
			pGen->pIn++; /* Jump the 'default' keyword */
			/* Compile the default block */
			rc = GenStateCompileSwitchBlock(pGen,nToken,&pSwitch->nDefault);
			if( rc == SXERR_ABORT){
				return SXERR_ABORT;
			}else if( rc == SXERR_EOF ){
				break;
			}
		}else if( nKwrd == PH7_TKWRD_CASE ){
			ph7_case_expr sCase;
			/* Standard case block */
			pGen->pIn++; /* Jump the 'case' keyword */
			/* initialize the structure */
			SySetInit(&sCase.aByteCode,&pGen->pVm->sAllocator,sizeof(VmInstr));
			/* Compile the case expression */
			rc = GenStateCompileCaseExpr(pGen,&sCase);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			/* Compile the case block */
			rc = GenStateCompileSwitchBlock(pGen,nToken,&sCase.nStart);
			/* Insert in the switch container */
			SySetPut(&pSwitch->aCaseExpr,(const void *)&sCase);
			if( rc == SXERR_ABORT){
				return SXERR_ABORT;
			}else if( rc == SXERR_EOF ){
				break;
			}
		}else{
			/* Unexpected token */
			rc = PH7_GenCompileError(&(*pGen),E_ERROR,pGen->pIn->nLine,"Switch: Unexpected token '%z'",
				&pGen->pIn->sData);
			if( rc == SXERR_ABORT ){
				return SXERR_ABORT;
			}
			break;
		}
	}
	/* Fix all jumps now the destination is resolved */
	pSwitch->nOut = PH7_VmInstrLength(pGen->pVm);
	GenStateFixJumps(pSwitchBlock,-1,PH7_VmInstrLength(pGen->pVm));
	/* Release the loop block */
	GenStateLeaveBlock(pGen,0);
	if( pGen->pIn < pGen->pEnd ){
		/* Jump the trailing curly braces or the endswitch keyword*/
		pGen->pIn++;
	}
	/* Statement successfully compiled */
	return SXRET_OK;
Synchronize:
	/* Synchronize with the first semi-colon */
	while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0 ){
		pGen->pIn++;
	}
	return SXRET_OK;
}
/*
 * Generate bytecode for a given expression tree.
 * If something goes wrong while generating bytecode
 * for the expression tree (A very unlikely scenario)
 * this function takes care of generating the appropriate
 * error message.
 */
static sxi32 GenStateEmitExprCode(
	ph7_gen_state *pGen,  /* Code generator state */
	ph7_expr_node *pNode, /* Root of the expression tree */
	sxi32 iFlags /* Control flags */
	)
{
	VmInstr *pInstr;
	sxu32 nJmpIdx;
	sxi32 iP1 = 0;
	sxu32 iP2 = 0;
	void *p3  = 0;
	sxi32 iVmOp;
	sxi32 rc;
	if( pNode->xCode ){
		SyToken *pTmpIn,*pTmpEnd;
		/* Compile node */
		SWAP_DELIMITER(pGen,pNode->pStart,pNode->pEnd);
		rc = pNode->xCode(&(*pGen),iFlags);
		RE_SWAP_DELIMITER(pGen);
		return rc;
	}
	if( pNode->pOp == 0 ){
		PH7_GenCompileError(&(*pGen),E_ERROR,pNode->pStart->nLine,
			"Invalid expression node,PH7 is aborting compilation");
		return SXERR_ABORT;
	}
	iVmOp = pNode->pOp->iVmOp;
	if( pNode->pOp->iOp == EXPR_OP_QUESTY ){
		sxu32 nJz,nJmp;
		/* Ternary operator require special handling */
		/* Phase#1: Compile the condition */
		rc = GenStateEmitExprCode(&(*pGen),pNode->pCond,iFlags);
		if( rc != SXRET_OK ){
			return rc;
		}
		nJz = nJmp = 0; /* cc -O6 warning */
		/* Phase#2: Emit the false jump */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_JZ,0,0,0,&nJz);
		if( pNode->pLeft ){
			/* Phase#3: Compile the 'then' expression  */
			rc = GenStateEmitExprCode(&(*pGen),pNode->pLeft,iFlags);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
		/* Phase#4: Emit the unconditional jump */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_JMP,0,0,0,&nJmp);
		/* Phase#5: Fix the false jump now the jump destination is resolved. */
		pInstr = PH7_VmGetInstr(pGen->pVm,nJz);
		if( pInstr ){
			pInstr->iP2 = PH7_VmInstrLength(pGen->pVm);
		}
		/* Phase#6: Compile the 'else' expression */
		if( pNode->pRight ){
			rc = GenStateEmitExprCode(&(*pGen),pNode->pRight,iFlags);
			if( rc != SXRET_OK ){
				return rc;
			}
		}
		if( nJmp > 0 ){
			/* Phase#7: Fix the unconditional jump */
			pInstr = PH7_VmGetInstr(pGen->pVm,nJmp);
			if( pInstr ){
				pInstr->iP2 = PH7_VmInstrLength(pGen->pVm);
			}
		}
		/* All done */
		return SXRET_OK;
	}
	/* Generate code for the left tree */
	if( pNode->pLeft ){
		if( iVmOp == PH7_OP_CALL ){
			ph7_expr_node **apNode;
			sxi32 n;
			/* Recurse and generate bytecodes for function arguments */
			apNode = (ph7_expr_node **)SySetBasePtr(&pNode->aNodeArgs);
			/* Read-only load */
			iFlags |= EXPR_FLAG_RDONLY_LOAD;
			for( n = 0 ; n < (sxi32)SySetUsed(&pNode->aNodeArgs) ; ++n ){
				rc = GenStateEmitExprCode(&(*pGen),apNode[n],iFlags&~EXPR_FLAG_LOAD_IDX_STORE);
				if( rc != SXRET_OK ){
					return rc;
				}
			}
			/* Total number of given arguments */
			iP1 = (sxi32)SySetUsed(&pNode->aNodeArgs);
			/* Remove stale flags now */
			iFlags &= ~EXPR_FLAG_RDONLY_LOAD;
		}
		rc = GenStateEmitExprCode(&(*pGen),pNode->pLeft,iFlags);
		if( rc != SXRET_OK ){
			return rc;
		}
		if( iVmOp == PH7_OP_CALL ){
			pInstr = PH7_VmPeekInstr(pGen->pVm);
			if( pInstr ){
				if ( pInstr->iOp == PH7_OP_LOADC ){
					/* Prevent constant expansion */
					pInstr->iP1 = 0;
				}else if( pInstr->iOp == PH7_OP_MEMBER /* $a->b(1,2,3) */ || pInstr->iOp == PH7_OP_NEW ){
					/* Method call,flag that */
					pInstr->iP2 = 1;
				}
			}
		}else if( iVmOp == PH7_OP_LOAD_IDX ){
			ph7_expr_node **apNode;
			sxi32 n;
			/* Recurse and generate bytecodes for array index */
			apNode = (ph7_expr_node **)SySetBasePtr(&pNode->aNodeArgs);
			for( n = 0 ; n < (sxi32)SySetUsed(&pNode->aNodeArgs) ; ++n ){
				rc = GenStateEmitExprCode(&(*pGen),apNode[n],iFlags&~EXPR_FLAG_LOAD_IDX_STORE);
				if( rc != SXRET_OK ){
					return rc;
				}
			}
			if( SySetUsed(&pNode->aNodeArgs) > 0 ){
				iP1 = 1; /* Node have an index associated with it */
			}
			if( iFlags & EXPR_FLAG_LOAD_IDX_STORE ){
				/* Create an empty entry when the desired index is not found */
				iP2 = 1;
			}
		}else if( pNode->pOp->iOp == EXPR_OP_COMMA ){
			/* POP the left node */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
		}
	}
	rc = SXRET_OK;
	nJmpIdx = 0;
	/* Generate code for the right tree */
	if( pNode->pRight ){
		if( iVmOp == PH7_OP_LAND ){
			/* Emit the false jump so we can short-circuit the logical and */
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_JZ,1/* Keep the value on the stack */,0,0,&nJmpIdx);
		}else if (iVmOp == PH7_OP_LOR ){
			/* Emit the true jump so we can short-circuit the logical or*/
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_JNZ,1/* Keep the value on the stack */,0,0,&nJmpIdx);
		}else if( pNode->pOp->iPrec == 18 /* Combined binary operators [i.e: =,'.=','+=',*=' ...] precedence */ ){
			iFlags |= EXPR_FLAG_LOAD_IDX_STORE;
		}
		rc = GenStateEmitExprCode(&(*pGen),pNode->pRight,iFlags);
		if( iVmOp == PH7_OP_STORE ){
			pInstr = PH7_VmPeekInstr(pGen->pVm);
			if( pInstr ){
				if( pInstr->iOp == PH7_OP_LOAD_LIST ){
					/* Hide the STORE instruction */
					iVmOp = 0;
				}else if(pInstr->iOp == PH7_OP_MEMBER ){
					/* Perform a member store operation [i.e: $this->x = 50] */
					iP2 = 1;
				}else{
					if( pInstr->iOp == PH7_OP_LOAD_IDX ){
						/* Transform the STORE instruction to STORE_IDX instruction */
						iVmOp = PH7_OP_STORE_IDX;
						iP1 = pInstr->iP1;
					}else{
						p3 = pInstr->p3;
					}
					/* POP the last dynamic load instruction */
					(void)PH7_VmPopInstr(pGen->pVm);
				}
			}
		}else if( iVmOp == PH7_OP_STORE_REF ){
			pInstr = PH7_VmPopInstr(pGen->pVm);
			if( pInstr ){
				if( pInstr->iOp == PH7_OP_LOAD_IDX ){
					/* Array insertion by reference [i.e: $pArray[] =& $some_var; ]
					 * We have to convert the STORE_REF instruction into STORE_IDX_REF 
					 */
					iVmOp = PH7_OP_STORE_IDX_REF;
					iP1 = pInstr->iP1;
					iP2 = pInstr->iP2;
					p3  = pInstr->p3;
				}else{
					p3 = pInstr->p3;
				}
			}
		}
	}
	if( iVmOp > 0 ){
		if( iVmOp == PH7_OP_INCR || iVmOp == PH7_OP_DECR ){
			if( pNode->iFlags & EXPR_NODE_PRE_INCR ){
				/* Pre-increment/decrement operator [i.e: ++$i,--$j ] */
				iP1 = 1;
			}
		}else if( iVmOp == PH7_OP_NEW ){
			pInstr = PH7_VmPeekInstr(pGen->pVm);
			if( pInstr && pInstr->iOp == PH7_OP_CALL ){
				VmInstr *pPrev;
				pPrev = PH7_VmPeekNextInstr(pGen->pVm);
				if( pPrev == 0 || pPrev->iOp != PH7_OP_MEMBER ){
					/* Pop the call instruction */
					iP1 = pInstr->iP1;
					(void)PH7_VmPopInstr(pGen->pVm);
				}
			}
		}else if( iVmOp == PH7_OP_MEMBER){
			if( pNode->pOp->iOp == EXPR_OP_DC /* '::' */){
				/* Static member access,remember that */
				iP1 = 1;
				pInstr = PH7_VmPeekInstr(pGen->pVm);
				if( pInstr && pInstr->iOp == PH7_OP_LOAD ){
					p3 = pInstr->p3;
					(void)PH7_VmPopInstr(pGen->pVm);
				}
			}
		}
		/* Finally,emit the VM instruction associated with this operator */
		PH7_VmEmitInstr(pGen->pVm,iVmOp,iP1,iP2,p3,0);
		if( nJmpIdx > 0 ){
			/* Fix short-circuited jumps now the destination is resolved */
			pInstr = PH7_VmGetInstr(pGen->pVm,nJmpIdx);
			if( pInstr ){
				pInstr->iP2 = PH7_VmInstrLength(pGen->pVm);
			}
		}
	}
	return rc;
}
/*
 * Compile a PHP expression.
 * According to the PHP language reference manual:
 *  Expressions are the most important building stones of PHP.
 *  In PHP, almost anything you write is an expression.
 *  The simplest yet most accurate way to define an expression
 *  is "anything that has a value". 
 * If something goes wrong while compiling the expression,this
 * function takes care of generating the appropriate error
 * message.
 */
static sxi32 PH7_CompileExpr(
	ph7_gen_state *pGen, /* Code generator state */
	sxi32 iFlags,        /* Control flags */
	sxi32 (*xTreeValidator)(ph7_gen_state *,ph7_expr_node *) /* Node validator callback.NULL otherwise */
	)
{
	ph7_expr_node *pRoot;
	SySet sExprNode;
	SyToken *pEnd;
	sxi32 nExpr;
	sxi32 iNest;
	sxi32 rc;
	/* Initialize worker variables */
	nExpr = 0;
	pRoot = 0;
	SySetInit(&sExprNode,&pGen->pVm->sAllocator,sizeof(ph7_expr_node *));
	SySetAlloc(&sExprNode,0x10);
	rc = SXRET_OK;
	/* Delimit the expression */
	pEnd = pGen->pIn;
	iNest = 0;
	while( pEnd < pGen->pEnd ){
		if( pEnd->nType & PH7_TK_OCB /* '{' */ ){
			/* Ticket 1433-30: Annonymous/Closure functions body */
			iNest++;
		}else if(pEnd->nType & PH7_TK_CCB /* '}' */ ){
			iNest--;
		}else if( pEnd->nType & PH7_TK_SEMI /* ';' */ ){
			if( iNest <= 0 ){
				break;
			}
		}
		pEnd++;
	}
	if( iFlags & EXPR_FLAG_COMMA_STATEMENT ){
		SyToken *pEnd2 = pGen->pIn;
		iNest = 0;
		/* Stop at the first comma */
		while( pEnd2 < pEnd ){
			if( pEnd2->nType & (PH7_TK_OCB/*'{'*/|PH7_TK_OSB/*'['*/|PH7_TK_LPAREN/*'('*/) ){
				iNest++;
			}else if(pEnd2->nType & (PH7_TK_CCB/*'}'*/|PH7_TK_CSB/*']'*/|PH7_TK_RPAREN/*')'*/)){
				iNest--;
			}else if( pEnd2->nType & PH7_TK_COMMA /*','*/ ){
				if( iNest <= 0 ){
					break;
				}
			}
			pEnd2++;
		}
		if( pEnd2 <pEnd ){
			pEnd = pEnd2;
		}
	}
	if( pEnd > pGen->pIn ){
		SyToken *pTmp = pGen->pEnd;
		/* Swap delimiter */
		pGen->pEnd = pEnd;
		/* Try to get an expression tree */
		rc = PH7_ExprMakeTree(&(*pGen),&sExprNode,&pRoot);
		if( rc == SXRET_OK && pRoot ){
			rc = SXRET_OK;
			if( xTreeValidator ){
				/* Call the upper layer validator callback */
				rc = xTreeValidator(&(*pGen),pRoot);
			}
			if( rc != SXERR_ABORT ){
				/* Generate code for the given tree */
				rc = GenStateEmitExprCode(&(*pGen),pRoot,iFlags);
			}
			nExpr = 1;
		}
		/* Release the whole tree */
		PH7_ExprFreeTree(&(*pGen),&sExprNode);
		/* Synchronize token stream */
		pGen->pEnd = pTmp;
		pGen->pIn  = pEnd;
		if( rc == SXERR_ABORT ){
			SySetRelease(&sExprNode);
			return SXERR_ABORT;
		}
	}
	SySetRelease(&sExprNode);
	return nExpr > 0 ? SXRET_OK : SXERR_EMPTY;
}
/*
 * Return a pointer to the node construct handler associated
 * with a given node type [i.e: string,integer,float,...].
 */
PH7_PRIVATE ProcNodeConstruct PH7_GetNodeHandler(sxu32 nNodeType)
{
	if( nNodeType & PH7_TK_NUM ){
		/* Numeric literal: Either real or integer */
		return PH7_CompileNumLiteral;
	}else if( nNodeType & PH7_TK_DSTR ){
		/* Double quoted string */
		return PH7_CompileString;
	}else if( nNodeType & PH7_TK_SSTR ){
		/* Single quoted string */
		return PH7_CompileSimpleString;
	}else if( nNodeType & PH7_TK_HEREDOC ){
		/* Heredoc */
		return PH7_CompileHereDoc;
	}else if( nNodeType & PH7_TK_NOWDOC ){
		/* Nowdoc */
		return PH7_CompileNowDoc;
	}else if( nNodeType & PH7_TK_BSTR ){
		/* Backtick quoted string */
		return PH7_CompileBacktic;
	}
	return 0;
}
/*
 * PHP Language construct table.
 */
static const LangConstruct aLangConstruct[] = {
	{ PH7_TKWRD_ECHO,     PH7_CompileEcho     }, /* echo language construct */
	{ PH7_TKWRD_IF,       PH7_CompileIf       }, /* if statement */
	{ PH7_TKWRD_FOR,      PH7_CompileFor      }, /* for statement */
	{ PH7_TKWRD_WHILE,    PH7_CompileWhile    }, /* while statement */
	{ PH7_TKWRD_FOREACH,  PH7_CompileForeach  }, /* foreach statement */
	{ PH7_TKWRD_FUNCTION, PH7_CompileFunction }, /* function statement */
	{ PH7_TKWRD_CONTINUE, PH7_CompileContinue }, /* continue statement */
	{ PH7_TKWRD_BREAK,    PH7_CompileBreak    }, /* break statement */
	{ PH7_TKWRD_RETURN,   PH7_CompileReturn   }, /* return statement */
	{ PH7_TKWRD_SWITCH,   PH7_CompileSwitch   }, /* Switch statement */
	{ PH7_TKWRD_DO,       PH7_CompileDoWhile  }, /* do{ }while(); statement */
	{ PH7_TKWRD_GLOBAL,   PH7_CompileGlobal   }, /* global statement */
	{ PH7_TKWRD_STATIC,   PH7_CompileStatic   }, /* static statement */
	{ PH7_TKWRD_DIE,      PH7_CompileHalt     }, /* die language construct */
	{ PH7_TKWRD_EXIT,     PH7_CompileHalt     }, /* exit language construct */
	{ PH7_TKWRD_TRY,      PH7_CompileTry      }, /* try statement */
	{ PH7_TKWRD_THROW,    PH7_CompileThrow    }, /* throw statement */
	{ PH7_TKWRD_GOTO,     PH7_CompileGoto     }, /* goto statement */
	{ PH7_TKWRD_CONST,    PH7_CompileConstant }, /* const statement */
	{ PH7_TKWRD_VAR,      PH7_CompileVar      }, /* var statement */
	{ PH7_TKWRD_NAMESPACE, PH7_CompileNamespace }, /* namespace statement */
	{ PH7_TKWRD_USE,      PH7_CompileUse      },  /* use statement */
	{ PH7_TKWRD_DECLARE,  PH7_CompileDeclare  }   /* declare statement */
};
/*
 * Return a pointer to the statement handler routine associated
 * with a given PHP keyword [i.e: if,for,while,...].
 */
static ProcLangConstruct GenStateGetStatementHandler(
	sxu32 nKeywordID,   /* Keyword  ID*/
	SyToken *pLookahed  /* Look-ahead token */
	)
{
	sxu32 n = 0;
	for(;;){
		if( n >= SX_ARRAYSIZE(aLangConstruct) ){
			break;
		}
		if( aLangConstruct[n].nID == nKeywordID ){
			if( nKeywordID == PH7_TKWRD_STATIC && pLookahed && (pLookahed->nType & PH7_TK_OP)){
				const ph7_expr_op *pOp = (const ph7_expr_op *)pLookahed->pUserData;
				if( pOp && pOp->iOp == EXPR_OP_DC /*::*/){
					/* 'static' (class context),return null */
					return 0;
				}
			}
			/* Return a pointer to the handler.
			*/
			return aLangConstruct[n].xConstruct;
		}
		n++;
	}
	if( pLookahed ){
		if(nKeywordID == PH7_TKWRD_INTERFACE && (pLookahed->nType & PH7_TK_ID) ){
			return PH7_CompileClassInterface;
		}else if(nKeywordID == PH7_TKWRD_CLASS && (pLookahed->nType & PH7_TK_ID) ){
			return PH7_CompileClass;
		}else if( nKeywordID == PH7_TKWRD_ABSTRACT && (pLookahed->nType & PH7_TK_KEYWORD)
			&& SX_PTR_TO_INT(pLookahed->pUserData) == PH7_TKWRD_CLASS ){
				return PH7_CompileAbstractClass;
		}else if( nKeywordID == PH7_TKWRD_FINAL && (pLookahed->nType & PH7_TK_KEYWORD)
			&& SX_PTR_TO_INT(pLookahed->pUserData) == PH7_TKWRD_CLASS ){
				return PH7_CompileFinalClass;
		}
	}
	/* Not a language construct */
	return 0;
}
/*
 * Check if the given keyword is in fact a PHP language construct.
 * Return TRUE on success. FALSE otheriwse.
 */
static int GenStateisLangConstruct(sxu32 nKeyword)
{
	int rc;
	rc = PH7_IsLangConstruct(nKeyword,TRUE);
	if( rc == FALSE ){
		if( nKeyword == PH7_TKWRD_SELF || nKeyword == PH7_TKWRD_PARENT || nKeyword == PH7_TKWRD_STATIC
			/*|| nKeyword == PH7_TKWRD_CLASS || nKeyword == PH7_TKWRD_FINAL || nKeyword == PH7_TKWRD_EXTENDS 
			  || nKeyword == PH7_TKWRD_ABSTRACT || nKeyword == PH7_TKWRD_INTERFACE 
			  || nKeyword == PH7_TKWRD_PUBLIC || nKeyword == PH7_TKWRD_PROTECTED 
			  || nKeyword == PH7_TKWRD_PRIVATE || nKeyword == PH7_TKWRD_IMPLEMENTS
			*/
			){
				rc = TRUE;
		}
	}
	return rc;
}
/*
 * Compile a PHP chunk.
 * If something goes wrong while compiling the PHP chunk,this function
 * takes care of generating the appropriate error message.
 */
static sxi32 GenStateCompileChunk(
	ph7_gen_state *pGen, /* Code generator state */
	sxi32 iFlags         /* Compile flags */
	)
{
	ProcLangConstruct xCons;
	sxi32 rc;
	rc = SXRET_OK; /* Prevent compiler warning */
	for(;;){
		if( pGen->pIn >= pGen->pEnd ){
			/* No more input to process */
			break;
		}
		if( pGen->pIn->nType & PH7_TK_OCB /* '{' */ ){
			/* Compile block */
			rc = PH7_CompileBlock(&(*pGen),0);
			if( rc == SXERR_ABORT ){
				break;
			}
		}else{
			xCons = 0;
			if( pGen->pIn->nType & PH7_TK_KEYWORD ){
				sxu32 nKeyword = (sxu32)SX_PTR_TO_INT(pGen->pIn->pUserData);
				/* Try to extract a language construct handler */
				xCons = GenStateGetStatementHandler(nKeyword,(&pGen->pIn[1] < pGen->pEnd) ? &pGen->pIn[1] : 0);
				if( xCons == 0 && GenStateisLangConstruct(nKeyword) == FALSE ){
					rc = PH7_GenCompileError(pGen,E_ERROR,pGen->pIn->nLine,
						"Syntax error: Unexpected keyword '%z'",
						&pGen->pIn->sData);
					if( rc == SXERR_ABORT ){
						break;
					}
					/* Synchronize with the first semi-colon and avoid compiling
					 * this erroneous statement.
					 */
					xCons = PH7_ErrorRecover;
				}
			}else if( (pGen->pIn->nType & PH7_TK_ID) && (&pGen->pIn[1] < pGen->pEnd)
				&& (pGen->pIn[1].nType & PH7_TK_COLON /*':'*/) ){
				/* Label found [i.e: Out: ],point to the routine responsible of compiling it */
				xCons = PH7_CompileLabel;
			}
			if( xCons == 0 ){
				/* Assume an expression an try to compile it */
				rc = PH7_CompileExpr(&(*pGen),0,0);
				if(  rc != SXERR_EMPTY ){
					/* Pop l-value */
					PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
				}
			}else{
				/* Go compile the sucker */
				rc = xCons(&(*pGen));
			}
			if( rc == SXERR_ABORT ){
				/* Request to abort compilation */
				break;
			}
		}
		/* Ignore trailing semi-colons ';' */
		while( pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) ){
			pGen->pIn++;
		}
		if( iFlags & PH7_COMPILE_SINGLE_STMT ){
			/* Compile a single statement and return */
			break;
		}
		/* LOOP ONE */
		/* LOOP TWO */
		/* LOOP THREE */
		/* LOOP FOUR */
	}
	/* Return compilation status */
	return rc;
}
/*
 * Compile a Raw PHP chunk.
 * If something goes wrong while compiling the PHP chunk,this function
 * takes care of generating the appropriate error message.
 */
static sxi32 PH7_CompilePHP(
	ph7_gen_state *pGen,  /* Code generator state */
	SySet *pTokenSet,     /* Token set */
	int is_expr           /* TRUE if we are dealing with a simple expression */
	)
{
	SyToken *pScript = pGen->pRawIn; /* Script to compile */
	sxi32 rc;
	/* Reset the token set */
	SySetReset(&(*pTokenSet));
	/* Mark as the default token set */
	pGen->pTokenSet = &(*pTokenSet);
	/* Advance the stream cursor */
	pGen->pRawIn++;
	/* Tokenize the PHP chunk first */
	PH7_TokenizePHP(SyStringData(&pScript->sData),SyStringLength(&pScript->sData),pScript->nLine,&(*pTokenSet));
	/* Point to the head and tail of the token stream. */
	pGen->pIn  = (SyToken *)SySetBasePtr(pTokenSet);
	pGen->pEnd = &pGen->pIn[SySetUsed(pTokenSet)];
	if( is_expr ){
		rc = SXERR_EMPTY;
		if( pGen->pIn < pGen->pEnd ){
			/* A simple expression,compile it */
			rc = PH7_CompileExpr(pGen,0,0);
		}
		/* Emit the DONE instruction */
		PH7_VmEmitInstr(pGen->pVm,PH7_OP_DONE,(rc != SXERR_EMPTY ? 1 : 0),0,0,0);
		return SXRET_OK;
	}
	if( pGen->pIn < pGen->pEnd && ( pGen->pIn->nType & PH7_TK_EQUAL ) ){
		static const sxu32 nKeyID = PH7_TKWRD_ECHO;
		/*
		 * Shortcut syntax for the 'echo' language construct.
		 * According to the PHP reference manual:
		 *  echo() also has a shortcut syntax, where you can
		 *  immediately follow
		 *  the opening tag with an equals sign as follows:
		 *  <?= 4+5?> is the same as <?echo 4+5?>
		 * Symisc extension:
		 *   This short syntax works with all PHP opening
		 *   tags unlike the default PHP engine that handle
		 *   only short tag.
		 */
		/* Ticket 1433-009: Emulate the 'echo' call */
		pGen->pIn->nType = PH7_TK_KEYWORD;
		pGen->pIn->pUserData = SX_INT_TO_PTR(nKeyID);
		SyStringInitFromBuf(&pGen->pIn->sData,"echo",sizeof("echo")-1);
		rc = PH7_CompileExpr(pGen,0,0);
		if( rc != SXERR_EMPTY ){
			PH7_VmEmitInstr(pGen->pVm,PH7_OP_POP,1,0,0,0);
		}
		return SXRET_OK;
	}
	/* Compile the PHP chunk */
	rc = GenStateCompileChunk(pGen,0);
	/* Fix exceptions jumps */
	GenStateFixJumps(pGen->pCurrent,PH7_OP_THROW,PH7_VmInstrLength(pGen->pVm));
	/* Fix gotos now, the jump destination is resolved */
	if( SXERR_ABORT == GenStateFixGoto(&(*pGen),0) ){
		rc = SXERR_ABORT;
	}
	/* Reset container */
	SySetReset(&pGen->aGoto);
	SySetReset(&pGen->aLabel);
	/* Compilation result */
	return rc;
}
/*
 * Compile a raw chunk. The raw chunk can contain PHP code embedded
 * in HTML, XML and so on. This function handle all the stuff.
 * This is the only compile interface exported from this file.
 */
PH7_PRIVATE sxi32 PH7_CompileScript(
	ph7_vm *pVm,        /* Generate PH7 byte-codes for this Virtual Machine */
	SyString *pScript,  /* Script to compile */
	sxi32 iFlags        /* Compile flags */
	)
{
	SySet aPhpToken,aRawToken;
	ph7_gen_state *pCodeGen;
	ph7_value *pRawObj;
	sxu32 nObjIdx;
	sxi32 nRawObj;
	int is_expr;
	sxi32 rc;
	if( pScript->nByte < 1 ){
		/* Nothing to compile */
		return PH7_OK;
	}
	/* Initialize the tokens containers */
	SySetInit(&aRawToken,&pVm->sAllocator,sizeof(SyToken));
	SySetInit(&aPhpToken,&pVm->sAllocator,sizeof(SyToken));
	SySetAlloc(&aPhpToken,0xc0);
	is_expr = 0;
	if( iFlags & PH7_PHP_ONLY ){
		SyToken sTmp;
		/* PHP only: -*/
		sTmp.nLine = 1;
		sTmp.nType = PH7_TOKEN_PHP;
		sTmp.pUserData = 0;
		SyStringDupPtr(&sTmp.sData,pScript);
		SySetPut(&aRawToken,(const void *)&sTmp);
		if( iFlags & PH7_PHP_EXPR ){
			/* A simple PHP expression */
			is_expr = 1;
		}
	}else{
		/* Tokenize raw text */
		SySetAlloc(&aRawToken,32);
		PH7_TokenizeRawText(pScript->zString,pScript->nByte,&aRawToken);
	}
	pCodeGen = &pVm->sCodeGen;
	/* Process high-level tokens */
	pCodeGen->pRawIn = (SyToken *)SySetBasePtr(&aRawToken);
	pCodeGen->pRawEnd = &pCodeGen->pRawIn[SySetUsed(&aRawToken)];
	rc = PH7_OK;
	if( is_expr ){
		/* Compile the expression */
		rc = PH7_CompilePHP(pCodeGen,&aPhpToken,TRUE);
		goto cleanup;
	}
	nObjIdx = 0;
	/* Start the compilation process */
	for(;;){
		if( pCodeGen->pRawIn >= pCodeGen->pRawEnd ){
			break; /* No more tokens to process */
		}
		if( pCodeGen->pRawIn->nType & PH7_TOKEN_PHP ){
			/* Compile the PHP chunk */
			rc = PH7_CompilePHP(pCodeGen,&aPhpToken,FALSE);
			if( rc == SXERR_ABORT ){
				break;
			}
			continue;
		}
		/* Raw chunk: [i.e: HTML, XML, etc.] */
		nRawObj = 0;
		while( (pCodeGen->pRawIn < pCodeGen->pRawEnd) && (pCodeGen->pRawIn->nType != PH7_TOKEN_PHP) ){
			/* Consume the raw chunk without any processing */
			pRawObj = PH7_ReserveConstObj(&(*pVm),&nObjIdx);
			if( pRawObj == 0 ){
				rc = SXERR_MEM;
				break;
			}
			/* Mark as constant and emit the load constant instruction */
			PH7_MemObjInitFromString(pVm,pRawObj,&pCodeGen->pRawIn->sData);
			PH7_VmEmitInstr(&(*pVm),PH7_OP_LOADC,0,nObjIdx,0,0);
			++nRawObj;
			pCodeGen->pRawIn++; /* Next chunk */
		}
		if( nRawObj > 0 ){
			/* Emit the consume instruction */
			PH7_VmEmitInstr(&(*pVm),PH7_OP_CONSUME,nRawObj,0,0,0);
		}
	}
cleanup:
	SySetRelease(&aRawToken);
	SySetRelease(&aPhpToken);
	return rc;
}
/*
 * Utility routines.Initialize the code generator.
 */
PH7_PRIVATE sxi32 PH7_InitCodeGenerator(
	ph7_vm *pVm,       /* Target VM */
	ProcConsumer xErr, /* Error log consumer callabck  */
	void *pErrData     /* Last argument to xErr() */
	)
{
	ph7_gen_state *pGen = &pVm->sCodeGen;
	/* Zero the structure */
	SyZero(pGen,sizeof(ph7_gen_state));
	/* Initial state */
	pGen->pVm  = &(*pVm);
	pGen->xErr = xErr;
	pGen->pErrData = pErrData;
	SySetInit(&pGen->aLabel,&pVm->sAllocator,sizeof(Label));
	SySetInit(&pGen->aGoto,&pVm->sAllocator,sizeof(JumpFixup));
	SyHashInit(&pGen->hLiteral,&pVm->sAllocator,0,0);
	SyHashInit(&pGen->hVar,&pVm->sAllocator,0,0);
	/* Error log buffer */
	SyBlobInit(&pGen->sErrBuf,&pVm->sAllocator);
	/* General purpose working buffer */
	SyBlobInit(&pGen->sWorker,&pVm->sAllocator);
	/* Create the global scope */
	GenStateInitBlock(pGen,&pGen->sGlobal,GEN_BLOCK_GLOBAL,PH7_VmInstrLength(&(*pVm)),0);
	/* Point to the global scope */
	pGen->pCurrent = &pGen->sGlobal;
	return SXRET_OK;
}
/*
 * Utility routines. Reset the code generator to it's initial state.
 */
PH7_PRIVATE sxi32 PH7_ResetCodeGenerator(
	ph7_vm *pVm,       /* Target VM */
	ProcConsumer xErr, /* Error log consumer callabck  */
	void *pErrData     /* Last argument to xErr() */
	)
{
	ph7_gen_state *pGen = &pVm->sCodeGen;
	GenBlock *pBlock,*pParent;
	/* Reset state */
	SySetReset(&pGen->aLabel);
	SySetReset(&pGen->aGoto);
	SyBlobRelease(&pGen->sErrBuf);
	SyBlobRelease(&pGen->sWorker);
	/* Point to the global scope */
	pBlock = pGen->pCurrent;
	while( pBlock->pParent != 0 ){
		pParent = pBlock->pParent;
		GenStateFreeBlock(pBlock);
		pBlock = pParent;
	}
	pGen->xErr = xErr;
	pGen->pErrData = pErrData;
	pGen->pCurrent = &pGen->sGlobal;
	pGen->pRawIn = pGen->pRawEnd = 0;
	pGen->pIn = pGen->pEnd = 0;
	pGen->nErr = 0;
	return SXRET_OK;
}
/*
 * Generate a compile-time error message.
 * If the error count limit is reached (usually 15 error message)
 * this function return SXERR_ABORT.In that case upper-layers must
 * abort compilation immediately.
 */
PH7_PRIVATE sxi32 PH7_GenCompileError(ph7_gen_state *pGen,sxi32 nErrType,sxu32 nLine,const char *zFormat,...)
{
	SyBlob *pWorker = &pGen->sErrBuf;
	const char *zErr = "Error";
	SyString *pFile;
	va_list ap;
	sxi32 rc;
	/* Reset the working buffer */
	SyBlobReset(pWorker);
	/* Peek the processed file path if available */
	pFile = (SyString *)SySetPeek(&pGen->pVm->aFiles);
	if( pFile && pGen->xErr ){
		/* Append file name */
		SyBlobAppend(pWorker,pFile->zString,pFile->nByte);
		SyBlobAppend(pWorker,(const void *)": ",sizeof(": ")-1);
	}
	if( nErrType == E_ERROR ){
		/* Increment the error counter */
		pGen->nErr++;
		if( pGen->nErr > 15 ){
			/* Error count limit reached */
			if( pGen->xErr ){
				SyBlobFormat(pWorker,"%u Error count limit reached,PH7 is aborting compilation\n",nLine);
				if( SyBlobLength(pWorker) > 0 ){
					/* Consume the generated error message */
					pGen->xErr(SyBlobData(pWorker),SyBlobLength(pWorker),pGen->pErrData);
				}
			}
			/* Abort immediately */
			return SXERR_ABORT;
		}
	}
	if( pGen->xErr == 0 ){
		/* No available error consumer,return immediately */
		return SXRET_OK;
	}
	switch(nErrType){
	case E_WARNING: zErr = "Warning";     break;
	case E_PARSE:   zErr = "Parse error"; break;
	case E_NOTICE:  zErr = "Notice";      break;
	case E_USER_ERROR:   zErr = "User error";   break;
	case E_USER_WARNING: zErr = "User warning"; break;
	case E_USER_NOTICE:  zErr = "User notice";  break;
	default:
		break;
	}
	rc = SXRET_OK;
	/* Format the error message */
	SyBlobFormat(pWorker,"%u %s: ",nLine,zErr);
	va_start(ap,zFormat);
	SyBlobFormatAp(pWorker,zFormat,ap);
	va_end(ap);
	/* Append a new line */
	SyBlobAppend(pWorker,(const void *)"\n",sizeof(char));
	if( SyBlobLength(pWorker) > 0 ){
		/* Consume the generated error message */
		pGen->xErr(SyBlobData(pWorker),SyBlobLength(pWorker),pGen->pErrData);
	}
	return rc;
}
/*
 * ----------------------------------------------------------
 * File: builtin.c
 * MD5: 243e3ae4de6382dfa13bd461b136240b
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: builtin.c v1.0 FreeBSD 2012-08-06 08:39 devel <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/* This file implement built-in 'foreign' functions for the PH7 engine */
/*
 * Section:
 *    Variable handling Functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * bool is_bool($var)
 *  Finds out whether a variable is a boolean.
 * Parameters
 *   $var: The variable being evaluated.
 * Return
 *  TRUE if var is a boolean. False otherwise.
 */
static int PH7_builtin_is_bool(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_bool(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_float($var)
 * bool is_real($var)
 * bool is_double($var)
 *  Finds out whether a variable is a float.
 * Parameters
 *   $var: The variable being evaluated.
 * Return
 *  TRUE if var is a float. False otherwise.
 */
static int PH7_builtin_is_float(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_float(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_int($var)
 * bool is_integer($var)
 * bool is_long($var)
 *  Finds out whether a variable is an integer.
 * Parameters
 *   $var: The variable being evaluated.
 * Return
 *  TRUE if var is an integer. False otherwise.
 */
static int PH7_builtin_is_int(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_int(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_string($var)
 *  Finds out whether a variable is a string.
 * Parameters
 *   $var: The variable being evaluated.
 * Return
 *  TRUE if var is string. False otherwise.
 */
static int PH7_builtin_is_string(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_string(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_null($var)
 *  Finds out whether a variable is NULL.
 * Parameters
 *   $var: The variable being evaluated.
 * Return
 *  TRUE if var is NULL. False otherwise.
 */
static int PH7_builtin_is_null(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_null(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_numeric($var)
 *  Find out whether a variable is NULL.
 * Parameters
 *  $var: The variable being evaluated.
 * Return
 *  True if var is numeric. False otherwise.
 */
static int PH7_builtin_is_numeric(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_numeric(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_scalar($var)
 *  Find out whether a variable is a scalar.
 * Parameters
 *  $var: The variable being evaluated.
 * Return
 *  True if var is scalar. False otherwise.
 */
static int PH7_builtin_is_scalar(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_scalar(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_array($var)
 *  Find out whether a variable is an array.
 * Parameters
 *  $var: The variable being evaluated.
 * Return
 *  True if var is an array. False otherwise.
 */
static int PH7_builtin_is_array(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_array(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_object($var)
 *  Find out whether a variable is an object.
 * Parameters
 *  $var: The variable being evaluated.
 * Return
 *  True if var is an object. False otherwise.
 */
static int PH7_builtin_is_object(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_object(apArg[0]);
	}
	/* Query result */
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * bool is_resource($var)
 *  Find out whether a variable is a resource.
 * Parameters
 *  $var: The variable being evaluated.
 * Return
 *  True if a resource. False otherwise.
 */
static int PH7_builtin_is_resource(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 0; /* Assume false by default */
	if( nArg > 0 ){
		res = ph7_value_is_resource(apArg[0]);
	}
	ph7_result_bool(pCtx,res);
	return PH7_OK;
}
/*
 * float floatval($var)
 *  Get float value of a variable.
 * Parameter
 *  $var: The variable being processed.
 * Return
 *  the float value of a variable.
 */
static int PH7_builtin_floatval(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 ){
		/* return 0.0 */
		ph7_result_double(pCtx,0);
	}else{
		double dval;
		/* Perform the cast */
		dval = ph7_value_to_double(apArg[0]);
		ph7_result_double(pCtx,dval);
	}
	return PH7_OK;
}
/*
 * int intval($var)
 *  Get integer value of a variable.
 * Parameter
 *  $var: The variable being processed.
 * Return
 *  the int value of a variable.
 */
static int PH7_builtin_intval(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 ){
		/* return 0 */
		ph7_result_int(pCtx,0);
	}else{
		sxi64 iVal;
		/* Perform the cast */
		iVal = ph7_value_to_int64(apArg[0]);
		ph7_result_int64(pCtx,iVal);
	}
	return PH7_OK;
}
/*
 * string strval($var)
 *  Get the string representation of a variable.
 * Parameter
 *  $var: The variable being processed.
 * Return
 *  the string value of a variable.
 */
static int PH7_builtin_strval(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	if( nArg < 1 ){
		/* return NULL */
		ph7_result_null(pCtx);
	}else{
		const char *zVal;
		int iLen = 0; /* cc -O6 warning */
		/* Perform the cast */
		zVal = ph7_value_to_string(apArg[0],&iLen);
		ph7_result_string(pCtx,zVal,iLen);
	}
	return PH7_OK;
}
/*
 * bool empty($var)
 *  Determine whether a variable is empty.
 * Parameters
 *   $var: The variable being checked.
 * Return
 *  0 if var has a non-empty and non-zero value.1 otherwise.
 */
static int PH7_builtin_empty(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int res = 1; /* Assume empty by default */
	if( nArg > 0 ){
		res = ph7_value_is_empty(apArg[0]);
	}
	ph7_result_bool(pCtx,res);
	return PH7_OK;
	
}
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifdef PH7_ENABLE_MATH_FUNC
/*
 * Section:
 *    Math Functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
#include <stdlib.h> /* abs */
#include <math.h>
/*
 * float sqrt(float $arg )
 *  Square root of the given number.
 * Parameter
 *  The number to process.
 * Return
 *  The square root of arg or the special value Nan of failure.
 */
static int PH7_builtin_sqrt(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = sqrt(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float exp(float $arg )
 *  Calculates the exponent of e.
 * Parameter
 *  The number to process.
 * Return
 *  'e' raised to the power of arg.
 */
static int PH7_builtin_exp(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = exp(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float floor(float $arg )
 *  Round fractions down.
 * Parameter
 *  The number to process.
 * Return
 *  Returns the next lowest integer value by rounding down value if necessary.
 */
static int PH7_builtin_floor(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = floor(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float cos(float $arg )
 *  Cosine.
 * Parameter
 *  The number to process.
 * Return
 *  The cosine of arg.
 */
static int PH7_builtin_cos(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = cos(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float acos(float $arg )
 *  Arc cosine.
 * Parameter
 *  The number to process.
 * Return
 *  The arc cosine of arg.
 */
static int PH7_builtin_acos(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = acos(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float cosh(float $arg )
 *  Hyperbolic cosine.
 * Parameter
 *  The number to process.
 * Return
 *  The hyperbolic cosine of arg.
 */
static int PH7_builtin_cosh(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = cosh(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float sin(float $arg )
 *  Sine.
 * Parameter
 *  The number to process.
 * Return
 *  The sine of arg.
 */
static int PH7_builtin_sin(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = sin(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float asin(float $arg )
 *  Arc sine.
 * Parameter
 *  The number to process.
 * Return
 *  The arc sine of arg.
 */
static int PH7_builtin_asin(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = asin(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float sinh(float $arg )
 *  Hyperbolic sine.
 * Parameter
 *  The number to process.
 * Return
 *  The hyperbolic sine of arg.
 */
static int PH7_builtin_sinh(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = sinh(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float ceil(float $arg )
 *  Round fractions up.
 * Parameter
 *  The number to process.
 * Return
 *  The next highest integer value by rounding up value if necessary.
 */
static int PH7_builtin_ceil(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = ceil(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float tan(float $arg )
 *  Tangent.
 * Parameter
 *  The number to process.
 * Return
 *  The tangent of arg.
 */
static int PH7_builtin_tan(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = tan(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float atan(float $arg )
 *  Arc tangent.
 * Parameter
 *  The number to process.
 * Return
 *  The arc tangent of arg.
 */
static int PH7_builtin_atan(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = atan(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float tanh(float $arg )
 *  Hyperbolic tangent.
 * Parameter
 *  The number to process.
 * Return
 *  The Hyperbolic tangent of arg.
 */
static int PH7_builtin_tanh(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = tanh(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float atan2(float $y,float $x)
 *  Arc tangent of two variable.
 * Parameter
 *  $y = Dividend parameter.
 *  $x = Divisor parameter.
 * Return
 *  The arc tangent of y/x in radian.
 */
static int PH7_builtin_atan2(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x,y;
	if( nArg < 2 ){
		/* Missing arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	y = ph7_value_to_double(apArg[0]);
	x = ph7_value_to_double(apArg[1]);
	/* Perform the requested operation */
	r = atan2(y,x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float/int64 abs(float/int64 $arg )
 *  Absolute value.
 * Parameter
 *  The number to process.
 * Return
 *  The absolute value of number.
 */
static int PH7_builtin_abs(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int is_float;	
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	is_float = ph7_value_is_float(apArg[0]);
	if( is_float ){
		double r,x;
		x = ph7_value_to_double(apArg[0]);
		/* Perform the requested operation */
		r = fabs(x);
		ph7_result_double(pCtx,r);
	}else{
		int r,x;
		x = ph7_value_to_int(apArg[0]);
		/* Perform the requested operation */
		r = abs(x);
		ph7_result_int(pCtx,r);
	}
	return PH7_OK;
}
/*
 * float log(float $arg,[int/float $base])
 *  Natural logarithm.
 * Parameter
 *  $arg: The number to process.
 *  $base: The optional logarithmic base to use. (only base-10 is supported)
 * Return
 *  The logarithm of arg to base, if given, or the natural logarithm.
 * Note: 
 *  only Natural log and base-10 log are supported. 
 */
static int PH7_builtin_log(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	if( nArg == 2 && ph7_value_is_numeric(apArg[1]) && ph7_value_to_int(apArg[1]) == 10 ){
		/* Base-10 log */
		r = log10(x);
	}else{
		r = log(x);
	}
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float log10(float $arg )
 *  Base-10 logarithm.
 * Parameter
 *  The number to process.
 * Return
 *  The Base-10 logarithm of the given number.
 */
static int PH7_builtin_log10(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	/* Perform the requested operation */
	r = log10(x);
	/* store the result back */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * number pow(number $base,number $exp)
 *  Exponential expression.
 * Parameter
 *  base
 *  The base to use.
 * exp
 *  The exponent.
 * Return
 *  base raised to the power of exp.
 *  If the result can be represented as integer it will be returned
 *  as type integer, else it will be returned as type float. 
 */
static int PH7_builtin_pow(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double r,x,y;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	x = ph7_value_to_double(apArg[0]);
	y = ph7_value_to_double(apArg[1]);
	/* Perform the requested operation */
	r = pow(x,y);
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float pi(void)
 *  Returns an approximation of pi. 
 * Note
 *  you can use the M_PI constant which yields identical results to pi(). 
 * Return
 *  The value of pi as float.
 */
static int PH7_builtin_pi(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	ph7_result_double(pCtx,PH7_PI);
	return PH7_OK;
}
/*
 * float fmod(float $x,float $y)
 *  Returns the floating point remainder (modulo) of the division of the arguments. 
 * Parameters
 * $x
 *  The dividend
 * $y
 *  The divisor
 * Return
 *  The floating point remainder of x/y.
 */
static int PH7_builtin_fmod(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double x,y,r; 
	if( nArg < 2 ){
		/* Missing arguments */
		ph7_result_double(pCtx,0);
		return PH7_OK;
	}
	/* Extract given arguments */
	x = ph7_value_to_double(apArg[0]);
	y = ph7_value_to_double(apArg[1]);
	/* Perform the requested operation */
	r = fmod(x,y);
	/* Processing result */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
/*
 * float hypot(float $x,float $y)
 *  Calculate the length of the hypotenuse of a right-angle triangle . 
 * Parameters
 * $x
 *  Length of first side
 * $y
 *  Length of first side
 * Return
 *  Calculated length of the hypotenuse.
 */
static int PH7_builtin_hypot(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	double x,y,r; 
	if( nArg < 2 ){
		/* Missing arguments */
		ph7_result_double(pCtx,0);
		return PH7_OK;
	}
	/* Extract given arguments */
	x = ph7_value_to_double(apArg[0]);
	y = ph7_value_to_double(apArg[1]);
	/* Perform the requested operation */
	r = hypot(x,y);
	/* Processing result */
	ph7_result_double(pCtx,r);
	return PH7_OK;
}
#endif /* PH7_ENABLE_MATH_FUNC */
/*
 * float round ( float $val [, int $precision = 0 [, int $mode = PHP_ROUND_HALF_UP ]] )
 *  Exponential expression.
 * Parameter
 *  $val
 *   The value to round.
 * $precision
 *   The optional number of decimal digits to round to.
 * $mode
 *   One of PHP_ROUND_HALF_UP, PHP_ROUND_HALF_DOWN, PHP_ROUND_HALF_EVEN, or PHP_ROUND_HALF_ODD.
 *   (not supported).
 * Return
 *  The rounded value.
 */
static int PH7_builtin_round(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int n = 0;
	double r;
	if( nArg < 1 ){
		/* Missing argument,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the precision if available */
	if( nArg > 1 ){
		n = ph7_value_to_int(apArg[1]);
		if( n>30 ){
			n = 30;
		}
		if( n<0 ){
			n = 0;
		}
	}
	r = ph7_value_to_double(apArg[0]);
	/* If Y==0 and X will fit in a 64-bit int,
     * handle the rounding directly.Otherwise 
	 * use our own cutsom printf [i.e:SyBufferFormat()].
     */
  if( n==0 && r>=0 && r<LARGEST_INT64-1 ){
    r = (double)((ph7_int64)(r+0.5));
  }else if( n==0 && r<0 && (-r)<LARGEST_INT64-1 ){
    r = -(double)((ph7_int64)((-r)+0.5));
  }else{
	  char zBuf[256];
	  sxu32 nLen;
	  nLen = SyBufferFormat(zBuf,sizeof(zBuf),"%.*f",n,r);
	  /* Convert the string to real number */
	  SyStrToReal(zBuf,nLen,(void *)&r,0);
  }
  /* Return thr rounded value */
  ph7_result_double(pCtx,r);
  return PH7_OK;
}
/*
 * string dechex(int $number)
 *  Decimal to hexadecimal.
 * Parameters
 *  $number
 *   Decimal value to convert
 * Return
 *  Hexadecimal string representation of number
 */
static int PH7_builtin_dechex(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iVal;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the given number */
	iVal = ph7_value_to_int(apArg[0]);
	/* Format */
	ph7_result_string_format(pCtx,"%x",iVal);
	return PH7_OK;
}
/*
 * string decoct(int $number)
 *  Decimal to Octal.
 * Parameters
 *  $number
 *   Decimal value to convert
 * Return
 *  Octal string representation of number
 */
static int PH7_builtin_decoct(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iVal;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the given number */
	iVal = ph7_value_to_int(apArg[0]);
	/* Format */
	ph7_result_string_format(pCtx,"%o",iVal);
	return PH7_OK;
}
/*
 * string decbin(int $number)
 *  Decimal to binary.
 * Parameters
 *  $number
 *   Decimal value to convert
 * Return
 *  Binary string representation of number
 */
static int PH7_builtin_decbin(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iVal;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the given number */
	iVal = ph7_value_to_int(apArg[0]);
	/* Format */
	ph7_result_string_format(pCtx,"%B",iVal);
	return PH7_OK;
}
/*
 * int64 hexdec(string $hex_string)
 *  Hexadecimal to decimal.
 * Parameters
 *  $hex_string
 *   The hexadecimal string to convert
 * Return
 *  The decimal representation of hex_string 
 */
static int PH7_builtin_hexdec(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zEnd;
	ph7_int64 iVal;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return -1 */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	iVal = 0;
	if( ph7_value_is_string(apArg[0]) ){
		/* Extract the given string */
		zString = ph7_value_to_string(apArg[0],&nLen);
		/* Delimit the string */
		zEnd = &zString[nLen];
		/* Ignore non hex-stream */
		while( zString < zEnd ){
			if( (unsigned char)zString[0] >= 0xc0 ){
				/* UTF-8 stream */
				zString++;
				while( zString < zEnd && (((unsigned char)zString[0] & 0xc0) == 0x80) ){
					zString++;
				}
			}else{
				if( SyisHex(zString[0]) ){
					break;
				}
				/* Ignore */
				zString++;
			}
		}
		if( zString < zEnd ){
			/* Cast */
			SyHexStrToInt64(zString,(sxu32)(zEnd-zString),(void *)&iVal,0);
		}
	}else{
		/* Extract as a 64-bit integer */
		iVal = ph7_value_to_int64(apArg[0]);
	}
	/* Return the number */
	ph7_result_int64(pCtx,iVal);
	return PH7_OK;
}
/*
 * int64 bindec(string $bin_string)
 *  Binary to decimal.
 * Parameters
 *  $bin_string
 *   The binary string to convert
 * Return
 *  Returns the decimal equivalent of the binary number represented by the binary_string argument.  
 */
static int PH7_builtin_bindec(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	ph7_int64 iVal;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return -1 */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	iVal = 0;
	if( ph7_value_is_string(apArg[0]) ){
		/* Extract the given string */
		zString = ph7_value_to_string(apArg[0],&nLen);
		if( nLen > 0 ){
			/* Perform a binary cast */
			SyBinaryStrToInt64(zString,(sxu32)nLen,(void *)&iVal,0);
		}
	}else{
		/* Extract as a 64-bit integer */
		iVal = ph7_value_to_int64(apArg[0]);
	}
	/* Return the number */
	ph7_result_int64(pCtx,iVal);
	return PH7_OK;
}
/*
 * int64 octdec(string $oct_string)
 *  Octal to decimal.
 * Parameters
 *  $oct_string
 *   The octal string to convert
 * Return
 *  Returns the decimal equivalent of the octal number represented by the octal_string argument.  
 */
static int PH7_builtin_octdec(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	ph7_int64 iVal;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return -1 */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	iVal = 0;
	if( ph7_value_is_string(apArg[0]) ){
		/* Extract the given string */
		zString = ph7_value_to_string(apArg[0],&nLen);
		if( nLen > 0 ){
			/* Perform the cast */
			SyOctalStrToInt64(zString,(sxu32)nLen,(void *)&iVal,0);
		}
	}else{
		/* Extract as a 64-bit integer */
		iVal = ph7_value_to_int64(apArg[0]);
	}
	/* Return the number */
	ph7_result_int64(pCtx,iVal);
	return PH7_OK;
}
/*
 * srand([int $seed])
 * mt_srand([int $seed])
 *  Seed the random number generator.
 * Parameters
 * $seed
 *  Optional seed value
 * Return
 *  null.
 * Note:
 *  THIS FUNCTION IS A NO-OP.
 *  THE PH7 PRNG IS AUTOMATICALLY SEEDED WHEN THE VM IS CREATED.
 */
static int PH7_builtin_srand(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SXUNUSED(nArg);
	SXUNUSED(apArg);
	ph7_result_null(pCtx);
	return PH7_OK;
}
/*
 * string base_convert(string $number,int $frombase,int $tobase)
 *  Convert a number between arbitrary bases.
 * Parameters
 * $number
 *  The number to convert
 * $frombase
 *  The base number is in
 * $tobase
 *  The base to convert number to
 * Return
 *  Number converted to base tobase 
 */
static int PH7_builtin_base_convert(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int nLen,iFbase,iTobase;
	const char *zNum;
	ph7_int64 iNum;
	if( nArg < 3 ){
		/* Return the empty string*/
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Base numbers */
	iFbase  = ph7_value_to_int(apArg[1]);
	iTobase = ph7_value_to_int(apArg[2]);
	if( ph7_value_is_string(apArg[0]) ){
		/* Extract the target number */
		zNum = ph7_value_to_string(apArg[0],&nLen);
		if( nLen < 1 ){
			/* Return the empty string*/
			ph7_result_string(pCtx,"",0);
			return PH7_OK;
		}
		/* Base conversion */
		switch(iFbase){
		case 16:
			/* Hex */
			SyHexStrToInt64(zNum,(sxu32)nLen,(void *)&iNum,0);
			break;
		case 8:
			/* Octal */
			SyOctalStrToInt64(zNum,(sxu32)nLen,(void *)&iNum,0);
			break;
		case 2:
			/* Binary */
			SyBinaryStrToInt64(zNum,(sxu32)nLen,(void *)&iNum,0);
			break;
		default:
			/* Decimal */
			SyStrToInt64(zNum,(sxu32)nLen,(void *)&iNum,0);
			break;
		}
	}else{
		iNum = ph7_value_to_int64(apArg[0]);
	}
	switch(iTobase){
	case 16:
		/* Hex */
		ph7_result_string_format(pCtx,"%qx",iNum); /* Quad hex */
		break;
	case 8:
		/* Octal */
		ph7_result_string_format(pCtx,"%qo",iNum); /* Quad octal */
		break;
	case 2:
		/* Binary */
		ph7_result_string_format(pCtx,"%qB",iNum); /* Quad binary */
		break;
	default:
		/* Decimal */
		ph7_result_string_format(pCtx,"%qd",iNum); /* Quad decimal */
		break;
	}
	return PH7_OK;
}
/*
 * Section:
 *    String handling Functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * string substr(string $string,int $start[, int $length ])
 *  Return part of a string.
 * Parameters
 *  $string
 *   The input string. Must be one character or longer.
 * $start
 *   If start is non-negative, the returned string will start at the start'th position
 *   in string, counting from zero. For instance, in the string 'abcdef', the character
 *   at position 0 is 'a', the character at position 2 is 'c', and so forth.
 *   If start is negative, the returned string will start at the start'th character
 *   from the end of string.
 *   If string is less than or equal to start characters long, FALSE will be returned.
 * $length
 *   If length is given and is positive, the string returned will contain at most length
 *   characters beginning from start (depending on the length of string).
 *   If length is given and is negative, then that many characters will be omitted from
 *   the end of string (after the start position has been calculated when a start is negative).
 *   If start denotes the position of this truncation or beyond, false will be returned.
 *   If length is given and is 0, FALSE or NULL an empty string will be returned.
 *   If length is omitted, the substring starting from start until the end of the string
 *   will be returned. 
 * Return
 *  Returns the extracted part of string, or FALSE on failure or an empty string.
 */
static int PH7_builtin_substr(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zSource,*zOfft;
	int nOfft,nLen,nSrcLen;	
	if( nArg < 2 ){
		/* return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zSource = ph7_value_to_string(apArg[0],&nSrcLen);
	if( nSrcLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	nLen = nSrcLen; /* cc warning */
	/* Extract the offset */
	nOfft = ph7_value_to_int(apArg[1]);
	if( nOfft < 0 ){
		zOfft = &zSource[nSrcLen+nOfft]; 
		if( zOfft < zSource ){
			/* Invalid offset */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		nLen = (int)(&zSource[nSrcLen]-zOfft);
		nOfft = (int)(zOfft-zSource);
	}else if( nOfft >= nSrcLen ){
		/* Invalid offset */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}else{
		zOfft = &zSource[nOfft];
		nLen = nSrcLen - nOfft;
	}
	if( nArg > 2 ){
		/* Extract the length */
		nLen = ph7_value_to_int(apArg[2]);
		if( nLen == 0 ){
			/* Invalid length,return an empty string */
			ph7_result_string(pCtx,"",0);
			return PH7_OK;
		}else if( nLen < 0 ){
			nLen = nSrcLen + nLen - nOfft;
			if( nLen < 1 ){
				/* Invalid  length */
				nLen = nSrcLen - nOfft;
			}
		}
		if( nLen + nOfft > nSrcLen ){
			/* Invalid length */
			nLen = nSrcLen - nOfft;
		}
	}
	/* Return the substring */
	ph7_result_string(pCtx,zOfft,nLen);
	return PH7_OK;
}
/*
 * int substr_compare(string $main_str,string $str ,int $offset[,int $length[,bool $case_insensitivity = false ]])
 *  Binary safe comparison of two strings from an offset, up to length characters.
 * Parameters
 *  $main_str
 *  The main string being compared.
 *  $str
 *   The secondary string being compared.
 * $offset
 *  The start position for the comparison. If negative, it starts counting from
 *  the end of the string.
 * $length
 *  The length of the comparison. The default value is the largest of the length 
 *  of the str compared to the length of main_str less the offset.
 * $case_insensitivity
 *  If case_insensitivity is TRUE, comparison is case insensitive.
 * Return
 *  Returns < 0 if main_str from position offset is less than str, > 0 if it is greater than
 *  str, and 0 if they are equal. If offset is equal to or greater than the length of main_str
 *  or length is set and is less than 1, substr_compare() prints a warning and returns FALSE. 
 */
static int PH7_builtin_substr_compare(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zSource,*zOfft,*zSub;
	int nOfft,nLen,nSrcLen,nSublen;
	int iCase = 0;
	int rc;
	if( nArg < 3 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zSource = ph7_value_to_string(apArg[0],&nSrcLen);
	if( nSrcLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	nLen = nSrcLen; /* cc warning */
	/* Extract the substring */
	zSub = ph7_value_to_string(apArg[1],&nSublen);
	if( nSublen < 1 || nSublen > nSrcLen){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the offset */
	nOfft = ph7_value_to_int(apArg[2]);
	if( nOfft < 0 ){
		zOfft = &zSource[nSrcLen+nOfft]; 
		if( zOfft < zSource ){
			/* Invalid offset */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		nLen = (int)(&zSource[nSrcLen]-zOfft);
		nOfft = (int)(zOfft-zSource);
	}else if( nOfft >= nSrcLen ){
		/* Invalid offset */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}else{
		zOfft = &zSource[nOfft];
		nLen = nSrcLen - nOfft;
	}
	if( nArg > 3 ){
		/* Extract the length */
		nLen = ph7_value_to_int(apArg[3]);
		if( nLen < 1 ){
			/* Invalid  length */
			ph7_result_int(pCtx,1);
			return PH7_OK;
		}else if( nLen + nOfft > nSrcLen ){
			/* Invalid length */
			nLen = nSrcLen - nOfft;
		}
		if( nArg > 4 ){
			/* Case-sensitive or not */
			iCase = ph7_value_to_bool(apArg[4]);
		}
	}
	/* Perform the comparison */
	if( iCase ){
		rc = SyStrnicmp(zOfft,zSub,(sxu32)nLen);
	}else{
		rc = SyStrncmp(zOfft,zSub,(sxu32)nLen);
	}
	/* Comparison result */
	ph7_result_int(pCtx,rc);
	return PH7_OK;
}
/*
 * int substr_count(string $haystack,string $needle[,int $offset = 0 [,int $length ]])
 *  Count the number of substring occurrences.
 * Parameters
 * $haystack
 *   The string to search in
 * $needle
 *   The substring to search for
 * $offset
 *  The offset where to start counting
 * $length (NOT USED)
 *  The maximum length after the specified offset to search for the substring.
 *  It outputs a warning if the offset plus the length is greater than the haystack length.
 * Return
 *  Toral number of substring occurrences.
 */
static int PH7_builtin_substr_count(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zText,*zPattern,*zEnd;
	int nTextlen,nPatlen;
	int iCount = 0;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to the haystack */
	zText = ph7_value_to_string(apArg[0],&nTextlen);
	/* Point to the neddle */
	zPattern = ph7_value_to_string(apArg[1],&nPatlen);
	if( nTextlen < 1 || nPatlen < 1 || nPatlen > nTextlen ){
		/* NOOP,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 2 ){
		int nOfft;
		/* Extract the offset */
		nOfft = ph7_value_to_int(apArg[2]);
		if( nOfft < 0 || nOfft > nTextlen ){
			/* Invalid offset,return zero */
			ph7_result_int(pCtx,0);
			return PH7_OK;
		}
		/* Point to the desired offset */
		zText = &zText[nOfft];
		/* Adjust length */
		nTextlen -= nOfft;
	}
	/* Point to the end of the string */
	zEnd = &zText[nTextlen];
	if( nArg > 3 ){
		int nLen;
		/* Extract the length */
		nLen = ph7_value_to_int(apArg[3]);
		if( nLen < 0 || nLen > nTextlen ){
			/* Invalid length,return 0 */
			ph7_result_int(pCtx,0);
			return PH7_OK;
		}
		/* Adjust pointer */
		nTextlen = nLen;
		zEnd = &zText[nTextlen];
	}
	/* Perform the search */
	for(;;){
		rc = SyBlobSearch((const void *)zText,(sxu32)(zEnd-zText),(const void *)zPattern,nPatlen,&nOfft);
		if( rc != SXRET_OK ){
			/* Pattern not found,break immediately */
			break;
		}
		/* Increment counter and update the offset */
		iCount++;
		zText += nOfft + nPatlen;
		if( zText >= zEnd ){
			break;
		}
	}
	/* Pattern count */
	ph7_result_int(pCtx,iCount);
	return PH7_OK;
}
/*
 * string chunk_split(string $body[,int $chunklen = 76 [, string $end = "\r\n" ]])
 *   Split a string into smaller chunks.
 * Parameters
 *  $body
 *   The string to be chunked.
 * $chunklen
 *   The chunk length.
 * $end
 *   The line ending sequence.
 * Return
 *  The chunked string or NULL on failure.
 */
static int PH7_builtin_chunk_split(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn,*zEnd,*zSep = "\r\n";
	int nSepLen,nChunkLen,nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Nothing to split,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* initialize/Extract arguments */
	nSepLen = (int)sizeof("\r\n") - 1;
	nChunkLen = 76;
	zIn = ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nArg > 1 ){
		/* Chunk length */
		nChunkLen = ph7_value_to_int(apArg[1]);
		if( nChunkLen < 1 ){
			/* Switch back to the default length */
			nChunkLen = 76;
		}
		if( nArg > 2 ){
			/* Separator */
			zSep = ph7_value_to_string(apArg[2],&nSepLen);
			if( nSepLen < 1 ){
				/* Switch back to the default separator */
				zSep = "\r\n";
				nSepLen = (int)sizeof("\r\n") - 1;
			}
		}
	}
	/* Perform the requested operation */
	if( nChunkLen > nLen ){
		/* Nothing to split,return the string and the separator */
		ph7_result_string_format(pCtx,"%.*s%.*s",nLen,zIn,nSepLen,zSep);
		return PH7_OK;
	}
	while( zIn < zEnd ){
		if( nChunkLen > (int)(zEnd-zIn) ){
			nChunkLen = (int)(zEnd - zIn);
		}
		/* Append the chunk and the separator */
		ph7_result_string_format(pCtx,"%.*s%.*s",nChunkLen,zIn,nSepLen,zSep);
		/* Point beyond the chunk */
		zIn += nChunkLen;
	}
	return PH7_OK;
}
/*
 * string addslashes(string $str)
 *  Quote string with slashes.
 *  Returns a string with backslashes before characters that need
 *  to be quoted in database queries etc. These characters are single
 *  quote ('), double quote ("), backslash (\) and NUL (the NULL byte). 
 * Parameter
 *  str: The string to be escaped.
 * Return
 *  Returns the escaped string
 */
static int PH7_builtin_addslashes(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Nothing to process,retun NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the string to process */
	zIn  = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	zEnd = &zIn[nLen];
	zCur = 0; /* cc warning */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input */
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '\'' && zIn[0] != '"' && zIn[0] != '\\' ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Append raw contents */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn < zEnd ){
			int c = zIn[0];
			ph7_result_string_format(pCtx,"\\%c",c);
		}
		zIn++;
	}
	return PH7_OK;
}
/*
 * Check if the given character is present in the given mask.
 * Return TRUE if present. FALSE otherwise.
 */
static int cSlashCheckMask(int c,const char *zMask,int nLen)
{
	const char *zEnd = &zMask[nLen];
	while( zMask < zEnd ){
		if( zMask[0] == c ){
			/* Character present,return TRUE */
			return 1;
		}
		/* Advance the pointer */
		zMask++;
	}
	/* Not present */
	return 0;
}
/*
 * string addcslashes(string $str,string $charlist)
 *  Quote string with slashes in a C style.
 * Parameter
 *  $str:
 *    The string to be escaped.
 *  $charlist:
 *    A list of characters to be escaped. If charlist contains characters \n, \r etc.
 *    they are converted in C-like style, while other non-alphanumeric characters 
 *    with ASCII codes lower than 32 and higher than 126 converted to octal representation. 
 * Return
 *  Returns the escaped string.
 * Note:
 *  Range characters [i.e: 'A..Z'] is not implemented in the current release.
 */
static int PH7_builtin_addcslashes(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd,*zMask;
	int nLen,nMask;
	if( nArg < 1 ){
		/* Nothing to process,retun NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the string to process */
	zIn  = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 || nArg < 2 ){
		/* Return the string untouched */
		ph7_result_string(pCtx,zIn,nLen);
		return PH7_OK;
	}
	/* Extract the desired mask */
	zMask = ph7_value_to_string(apArg[1],&nMask);
	zEnd = &zIn[nLen];
	zCur = 0; /* cc warning */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input */
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && !cSlashCheckMask(zIn[0],zMask,nMask) ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Append raw contents */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn < zEnd ){
			int c = zIn[0];
			if( c > 126 || (c < 32 && (!SyisAlphaNum(c)/*EBCDIC*/ && !SyisSpace(c))) ){
				/* Convert to octal */
				ph7_result_string_format(pCtx,"\\%o",c);
			}else{
				ph7_result_string_format(pCtx,"\\%c",c);
			}
		}
		zIn++;
	}
	return PH7_OK;
}
/*
 * string quotemeta(string $str)
 *  Quote meta characters.
 * Parameter
 *  $str:
 *    The string to be escaped.
 * Return
 *  Returns the escaped string.
*/
static int PH7_builtin_quotemeta(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Nothing to process,retun NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the string to process */
	zIn  = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	zEnd = &zIn[nLen];
	zCur = 0; /* cc warning */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input */
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && !cSlashCheckMask(zIn[0],".\\+*?[^]($)",(int)sizeof(".\\+*?[^]($)")-1) ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Append raw contents */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn < zEnd ){
			int c = zIn[0];
			ph7_result_string_format(pCtx,"\\%c",c);
		}
		zIn++;
	}
	return PH7_OK;
}
/*
 * string stripslashes(string $str)
 *  Un-quotes a quoted string.
 *  Returns a string with backslashes before characters that need
 *  to be quoted in database queries etc. These characters are single
 *  quote ('), double quote ("), backslash (\) and NUL (the NULL byte). 
 * Parameter
 *  $str
 *   The input string.
 * Return
 *  Returns a string with backslashes stripped off.
 */
static int PH7_builtin_stripslashes(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Nothing to process,retun NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the string to process */
	zIn  = ph7_value_to_string(apArg[0],&nLen);
	if( zIn == 0 ){
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	zEnd = &zIn[nLen];
	zCur = 0; /* cc warning */
	/* Encode the string */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input */
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '\\' ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Append raw contents */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( &zIn[1] < zEnd ){
			int c = zIn[1];
			if( c == '\'' || c == '"' || c == '\\' ){
				/* Ignore the backslash */
				zIn++;
			}
		}else{
			break;
		}
	}
	return PH7_OK;
}
/*
 * string htmlspecialchars(string $string [, int $flags = ENT_COMPAT | ENT_HTML401 [, string $charset]])
 *  HTML escaping of special characters.
 *  The translations performed are:
 *   '&' (ampersand) ==> '&amp;'
 *   '"' (double quote) ==> '&quot;' when ENT_NOQUOTES is not set.
 *   "'" (single quote) ==> '&#039;' only when ENT_QUOTES is set.
 *   '<' (less than) ==> '&lt;'
 *   '>' (greater than) ==> '&gt;'
 * Parameters
 *  $string
 *   The string being converted.
 * $flags
 *   A bitmask of one or more of the following flags, which specify how to handle quotes.
 *   The default is ENT_COMPAT | ENT_HTML401.
 *   ENT_COMPAT 	Will convert double-quotes and leave single-quotes alone.
 *   ENT_QUOTES 	Will convert both double and single quotes.
 *   ENT_NOQUOTES 	Will leave both double and single quotes unconverted.
 *   ENT_IGNORE 	Silently discard invalid code unit sequences instead of returning an empty string.
 * $charset
 *  Defines character set used in conversion. The default character set is ISO-8859-1. (Not used)
 * Return
 *  The escaped string or NULL on failure.
 */
static int PH7_builtin_htmlspecialchars(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd;
	int iFlags = 0x01|0x40; /* ENT_COMPAT | ENT_HTML401 */
	int nLen,c;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	/* Extract the flags if available */
	if( nArg > 1 ){
		iFlags = ph7_value_to_int(apArg[1]);
		if( iFlags < 0 ){
			iFlags = 0x01|0x40;
		}
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '&' && zIn[0] != '\'' && zIn[0] != '"' && zIn[0] != '<' && zIn[0] != '>' ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Append the raw string verbatim */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn >= zEnd ){
			break;
		}
		c = zIn[0];
		if( c == '&' ){
			/* Expand '&amp;' */
			ph7_result_string(pCtx,"&amp;",(int)sizeof("&amp;")-1);
		}else if( c == '<' ){
			/* Expand '&lt;' */
			ph7_result_string(pCtx,"&lt;",(int)sizeof("&lt;")-1);
		}else if( c == '>' ){
			/* Expand '&gt;' */
			ph7_result_string(pCtx,"&gt;",(int)sizeof("&gt;")-1);
		}else if( c == '\'' ){
			if( iFlags & 0x02 /*ENT_QUOTES*/ ){
				/* Expand '&#039;' */
				ph7_result_string(pCtx,"&#039;",(int)sizeof("&#039;")-1);
			}else{
				/* Leave the single quote untouched */
				ph7_result_string(pCtx,"'",(int)sizeof(char));
			}
		}else if( c == '"' ){
			if( (iFlags & 0x04) == 0 /*ENT_NOQUOTES*/ ){
				/* Expand '&quot;' */
				ph7_result_string(pCtx,"&quot;",(int)sizeof("&quot;")-1);
			}else{
				/* Leave the double quote untouched */
				ph7_result_string(pCtx,"\"",(int)sizeof(char));
			}
		}
		/* Ignore the unsafe HTML character */
		zIn++;
	}
	return PH7_OK;
}
/*
 * string htmlspecialchars_decode(string $string[,int $quote_style = ENT_COMPAT ])
 *  Unescape HTML entities.
 * Parameters
 *  $string
 *   The string to decode
 *  $quote_style
 *    The quote style. One of the following constants:
 *   ENT_COMPAT 	Will convert double-quotes and leave single-quotes alone (default)
 *   ENT_QUOTES 	Will convert both double and single quotes
 *   ENT_NOQUOTES 	Will leave both double and single quotes unconverted
 * Return
 *  The unescaped string or NULL on failure.
 */
static int PH7_builtin_htmlspecialchars_decode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd;
	int iFlags = 0x01; /* ENT_COMPAT */
	int nLen,nJump;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	/* Extract the flags if available */
	if( nArg > 1 ){
		iFlags = ph7_value_to_int(apArg[1]);
		if( iFlags < 0 ){
			iFlags = 0x01;
		}
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '&' ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Append the raw string verbatim */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		nLen = (int)(zEnd-zIn);
		nJump = (int)sizeof(char);
		if( nLen >= (int)sizeof("&amp;")-1 && SyStrnicmp(zIn,"&amp;",sizeof("&amp;")-1) == 0 ){
			/* &amp; ==> '&' */
			ph7_result_string(pCtx,"&",(int)sizeof(char));
			nJump = (int)sizeof("&amp;")-1;
		}else if( nLen >= (int)sizeof("&lt;")-1 && SyStrnicmp(zIn,"&lt;",sizeof("&lt;")-1) == 0 ){
			/* &lt; ==> < */
			ph7_result_string(pCtx,"<",(int)sizeof(char));
			nJump = (int)sizeof("&lt;")-1; 
		}else if( nLen >= (int)sizeof("&gt;")-1 && SyStrnicmp(zIn,"&gt;",sizeof("&gt;")-1) == 0 ){
			/* &gt; ==> '>' */
			ph7_result_string(pCtx,">",(int)sizeof(char));
			nJump = (int)sizeof("&gt;")-1; 
		}else if( nLen >= (int)sizeof("&quot;")-1 && SyStrnicmp(zIn,"&quot;",sizeof("&quot;")-1) == 0 ){
			/* &quot; ==> '"' */
			if( (iFlags & 0x04) == 0 /*ENT_NOQUOTES*/ ){
				ph7_result_string(pCtx,"\"",(int)sizeof(char));
			}else{
				/* Leave untouched */
				ph7_result_string(pCtx,"&quot;",(int)sizeof("&quot;")-1);
			}
			nJump = (int)sizeof("&quot;")-1;
		}else if( nLen >= (int)sizeof("&#039;")-1 && SyStrnicmp(zIn,"&#039;",sizeof("&#039;")-1) == 0 ){
			/* &#039; ==> ''' */
			if( iFlags & 0x02 /*ENT_QUOTES*/ ){
				/* Expand ''' */
				ph7_result_string(pCtx,"'",(int)sizeof(char));
			}else{
				/* Leave untouched */
				ph7_result_string(pCtx,"&#039;",(int)sizeof("&#039;")-1);
			}
			nJump = (int)sizeof("&#039;")-1;
		}else if( nLen >= (int)sizeof(char) ){
			/* expand '&' */
			ph7_result_string(pCtx,"&",(int)sizeof(char));
		}else{
			/* No more input to process */
			break;
		}
		zIn += nJump;
	}
	return PH7_OK;
}
/* HTML encoding/Decoding table 
 * Source: Symisc RunTime API.[chm@symisc.net]
 */
static const char *azHtmlEscape[] = {
 	"&lt;","<","&gt;",">","&amp;","&","&quot;","\"","&#39;","'",
	"&#33;","!","&#36;","$","&#35;","#","&#37;","%","&#40;","(",
	"&#41;",")","&#123;","{","&#125;","}","&#61;","=","&#43;","+",
	"&#63;","?","&#91;","[","&#93;","]","&#64;","@","&#44;","," 
 };
/*
 * array get_html_translation_table(void)
 *  Returns the translation table used by htmlspecialchars() and htmlentities().
 * Parameters
 *  None
 * Return
 *  The translation table as an array or NULL on failure.
 */
static int PH7_builtin_get_html_translation_table(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pArray,*pValue;
	sxu32 n;
	/* Element value */
	pValue = ph7_context_new_scalar(pCtx);
	if( pValue == 0 ){
		SXUNUSED(nArg); /* cc warning */
		SXUNUSED(apArg);
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Make the table */
	for( n = 0 ; n < SX_ARRAYSIZE(azHtmlEscape) ; n += 2 ){
		/* Prepare the value */
		ph7_value_string(pValue,azHtmlEscape[n],-1 /* Compute length automatically */);
		/* Insert the value */
		ph7_array_add_strkey_elem(pArray,azHtmlEscape[n+1],pValue);
		/* Reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
	}
	/* 
	 * Return the array.
	 * Don't worry about freeing memory, everything will be automatically
	 * released upon we return from this function.
	 */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * string htmlentities( string $string [, int $flags = ENT_COMPAT | ENT_HTML401]);
 *   Convert all applicable characters to HTML entities
 * Parameters
 * $string
 *   The input string.
 * $flags
 *  A bitmask of one or more of the flags (see block-comment on PH7_builtin_htmlspecialchars())
 * Return
 * The encoded string.
 */
static int PH7_builtin_htmlentities(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iFlags = 0x01; /* ENT_COMPAT */
	const char *zIn,*zEnd;
	int nLen,c;
	sxu32 n;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	/* Extract the flags if available */
	if( nArg > 1 ){
		iFlags = ph7_value_to_int(apArg[1]);
		if( iFlags < 0 ){
			iFlags = 0x01;
		}
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		c = zIn[0];
		/* Perform a linear lookup on the decoding table */
		for( n = 0 ; n < SX_ARRAYSIZE(azHtmlEscape) ; n += 2 ){
			if( azHtmlEscape[n+1][0] == c ){
				/* Got one */
				break;
			}
		}
		if( n < SX_ARRAYSIZE(azHtmlEscape) ){
			/* Output the safe sequence [i.e: '<' ==> '&lt;"] */
			if( c == '"' && (iFlags & 0x04) /*ENT_NOQUOTES*/ ){
				/* Expand the double quote verbatim */
				ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
			}else if(c == '\'' && ((iFlags & 0x02 /*ENT_QUOTES*/) == 0 || (iFlags & 0x04) /*ENT_NOQUOTES*/) ){
				/* expand single quote verbatim */
				ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
			}else{
				ph7_result_string(pCtx,azHtmlEscape[n],-1/*Compute length automatically */);
			}
		}else{
			/* Output character verbatim */
			ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
		}
		zIn++;
	}
	return PH7_OK;
}
/*
 * string html_entity_decode(string $string [, int $quote_style = ENT_COMPAT [, string $charset = 'UTF-8' ]])
 *   Perform the reverse operation of html_entity_decode().
 * Parameters
 * $string
 *   The input string.
 * $flags
 *  A bitmask of one or more of the flags (see comment on PH7_builtin_htmlspecialchars())
 * Return
 * The decoded string.
 */
static int PH7_builtin_html_entity_decode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zCur,*zIn,*zEnd;
	int iFlags = 0x01; /* ENT_COMPAT  */
	int nLen;
	sxu32 n;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	/* Extract the flags if available */
	if( nArg > 1 ){
		iFlags = ph7_value_to_int(apArg[1]);
		if( iFlags < 0 ){
			iFlags = 0x01;
		}
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '&' ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Append raw string verbatim */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn >= zEnd ){
			break;
		}
		nLen = (int)(zEnd-zIn);
		/* Find an encoded sequence */
		for(n = 0 ; n < SX_ARRAYSIZE(azHtmlEscape) ; n += 2 ){
			int iLen = (int)SyStrlen(azHtmlEscape[n]);
			if( nLen >= iLen && SyStrnicmp(zIn,azHtmlEscape[n],(sxu32)iLen) == 0 ){
				/* Got one */
				zIn += iLen;
				break;
			}
		}
		if( n < SX_ARRAYSIZE(azHtmlEscape) ){
			int c = azHtmlEscape[n+1][0];
			/* Output the decoded character */
			if( c == '\'' && ((iFlags & 0x02) == 0 /*ENT_QUOTES*/|| (iFlags & 0x04) /*ENT_NOQUOTES*/)  ){
				/* Do not process single quotes */
				ph7_result_string(pCtx,azHtmlEscape[n],-1);
			}else if( c == '"' && (iFlags & 0x04) /*ENT_NOQUOTES*/ ){
				/* Do not process double quotes */
				ph7_result_string(pCtx,azHtmlEscape[n],-1);
			}else{
				ph7_result_string(pCtx,azHtmlEscape[n+1],-1); /* Compute length automatically */
			}
		}else{
			/* Append '&' */
			ph7_result_string(pCtx,"&",(int)sizeof(char));
			zIn++;
		}
	}
	return PH7_OK;
}
/*
 * int strlen($string)
 *  return the length of the given string.
 * Parameter
 *  string: The string being measured for length.
 * Return
 *  length of the given string.
 */
static int PH7_builtin_strlen(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iLen = 0;
	if( nArg > 0 ){
		ph7_value_to_string(apArg[0],&iLen);
	}
	/* String length */
	ph7_result_int(pCtx,iLen);
	return PH7_OK;
}
/*
 * int strcmp(string $str1,string $str2)
 *  Perform a binary safe string comparison.
 * Parameter
 *  str1: The first string
 *  str2: The second string
 * Return
 *  Returns < 0 if str1 is less than str2; > 0 if str1 is greater 
 *  than str2, and 0 if they are equal.
 */
static int PH7_builtin_strcmp(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *z1,*z2;
	int n1,n2;
	int res;
	if( nArg < 2 ){
		res = nArg == 0 ? 0 : 1;
		ph7_result_int(pCtx,res);
		return PH7_OK;
	}
	/* Perform the comparison */
	z1 = ph7_value_to_string(apArg[0],&n1);
	z2 = ph7_value_to_string(apArg[1],&n2);
	res = SyStrncmp(z1,z2,(sxu32)(SXMAX(n1,n2)));
	/* Comparison result */
	ph7_result_int(pCtx,res);
	return PH7_OK;
}
/*
 * int strncmp(string $str1,string $str2,int n)
 *  Perform a binary safe string comparison of the first n characters.
 * Parameter
 *  str1: The first string
 *  str2: The second string
 * Return
 *  Returns < 0 if str1 is less than str2; > 0 if str1 is greater 
 *  than str2, and 0 if they are equal.
 */
static int PH7_builtin_strncmp(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *z1,*z2;
	int res;
	int n;
	if( nArg < 3 ){
		/* Perform a standard comparison */
		return PH7_builtin_strcmp(pCtx,nArg,apArg);
	}
	/* Desired comparison length */
	n  = ph7_value_to_int(apArg[2]);
	if( n < 0 ){
		/* Invalid length */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Perform the comparison */
	z1 = ph7_value_to_string(apArg[0],0);
	z2 = ph7_value_to_string(apArg[1],0);
	res = SyStrncmp(z1,z2,(sxu32)n);
	/* Comparison result */
	ph7_result_int(pCtx,res);
	return PH7_OK;
}
/*
 * int strcasecmp(string $str1,string $str2,int n)
 *  Perform a binary safe case-insensitive string comparison.
 * Parameter
 *  str1: The first string
 *  str2: The second string
 * Return
 *  Returns < 0 if str1 is less than str2; > 0 if str1 is greater 
 *  than str2, and 0 if they are equal.
 */
static int PH7_builtin_strcasecmp(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *z1,*z2;
	int n1,n2;
	int res;
	if( nArg < 2 ){
		res = nArg == 0 ? 0 : 1;
		ph7_result_int(pCtx,res);
		return PH7_OK;
	}
	/* Perform the comparison */
	z1 = ph7_value_to_string(apArg[0],&n1);
	z2 = ph7_value_to_string(apArg[1],&n2);
	res = SyStrnicmp(z1,z2,(sxu32)(SXMAX(n1,n2)));
	/* Comparison result */
	ph7_result_int(pCtx,res);
	return PH7_OK;
}
/*
 * int strncasecmp(string $str1,string $str2,int n)
 *  Perform a binary safe case-insensitive string comparison of the first n characters.
 * Parameter
 *  $str1: The first string
 *  $str2: The second string
 *  $len:  The length of strings to be used in the comparison.
 * Return
 *  Returns < 0 if str1 is less than str2; > 0 if str1 is greater 
 *  than str2, and 0 if they are equal.
 */
static int PH7_builtin_strncasecmp(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *z1,*z2;
	int res;
	int n;
	if( nArg < 3 ){
		/* Perform a standard comparison */
		return PH7_builtin_strcasecmp(pCtx,nArg,apArg);
	}
	/* Desired comparison length */
	n  = ph7_value_to_int(apArg[2]);
	if( n < 0 ){
		/* Invalid length */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Perform the comparison */
	z1 = ph7_value_to_string(apArg[0],0);
	z2 = ph7_value_to_string(apArg[1],0);
	res = SyStrnicmp(z1,z2,(sxu32)n);
	/* Comparison result */
	ph7_result_int(pCtx,res);
	return PH7_OK;
}
/*
 * Implode context [i.e: it's private data].
 * A pointer to the following structure is forwarded
 * verbatim to the array walker callback defined below.
 */
struct implode_data {
	ph7_context *pCtx;    /* Call context */
	int bRecursive;       /* TRUE if recursive implode [this is a symisc eXtension] */
	const char *zSep;     /* Arguments separator if any */
	int nSeplen;          /* Separator length */
	int bFirst;           /* TRUE if first call */
	int nRecCount;        /* Recursion count to avoid infinite loop */
};
/*
 * Implode walker callback for the [ph7_array_walk()] interface.
 * The following routine is invoked for each array entry passed
 * to the implode() function.
 */
static int implode_callback(ph7_value *pKey,ph7_value *pValue,void *pUserData)
{
	struct implode_data *pData = (struct implode_data *)pUserData;
	const char *zData;
	int nLen;
	if( pData->bRecursive && ph7_value_is_array(pValue) && pData->nRecCount < 32 ){
		if( pData->nSeplen > 0 ){
			if( !pData->bFirst ){
				/* append the separator first */
				ph7_result_string(pData->pCtx,pData->zSep,pData->nSeplen);
			}else{
				pData->bFirst = 0;
			}
		}
		/* Recurse */
		pData->bFirst = 1;
		pData->nRecCount++;
		PH7_HashmapWalk((ph7_hashmap *)pValue->x.pOther,implode_callback,pData);
		pData->nRecCount--;
		return PH7_OK;
	}
	/* Extract the string representation of the entry value */
	zData = ph7_value_to_string(pValue,&nLen);
	if( nLen > 0 ){
		if( pData->nSeplen > 0 ){
			if( !pData->bFirst ){
				/* append the separator first */
				ph7_result_string(pData->pCtx,pData->zSep,pData->nSeplen);
			}else{
				pData->bFirst = 0;
			}
		}
		ph7_result_string(pData->pCtx,zData,nLen);
	}else{
		SXUNUSED(pKey); /* cc warning */
	}
	return PH7_OK;
}
/*
 * string implode(string $glue,array $pieces,...)
 * string implode(array $pieces,...)
 *  Join array elements with a string.
 * $glue
 *   Defaults to an empty string. This is not the preferred usage of implode() as glue
 *   would be the second parameter and thus, the bad prototype would be used.
 * $pieces
 *   The array of strings to implode.
 * Return
 *  Returns a string containing a string representation of all the array elements in the same
 *  order, with the glue string between each element. 
 */
static int PH7_builtin_implode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	struct implode_data imp_data;
	int i = 1;
	if( nArg < 1 ){
		/* Missing argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Prepare the implode context */
	imp_data.pCtx = pCtx;
	imp_data.bRecursive = 0;
	imp_data.bFirst = 1;
	imp_data.nRecCount = 0;
	if( !ph7_value_is_array(apArg[0]) ){
		imp_data.zSep = ph7_value_to_string(apArg[0],&imp_data.nSeplen);
	}else{
		imp_data.zSep = 0;
		imp_data.nSeplen = 0;
		i = 0;
	}
	ph7_result_string(pCtx,"",0); /* Set an empty stirng */
	/* Start the 'join' process */
	while( i < nArg ){
		if( ph7_value_is_array(apArg[i]) ){
			/* Iterate throw array entries */
			ph7_array_walk(apArg[i],implode_callback,&imp_data);
		}else{
			const char *zData;
			int nLen;
			/* Extract the string representation of the ph7 value */
			zData = ph7_value_to_string(apArg[i],&nLen);
			if( nLen > 0 ){
				if( imp_data.nSeplen > 0 ){
					if( !imp_data.bFirst ){
						/* append the separator first */
						ph7_result_string(pCtx,imp_data.zSep,imp_data.nSeplen);
					}else{
						imp_data.bFirst = 0;
					}
				}
				ph7_result_string(pCtx,zData,nLen);
			}
		}
		i++;
	}
	return PH7_OK;
}
/*
 * Symisc eXtension:
 * string implode_recursive(string $glue,array $pieces,...)
 * Purpose
 *  Same as implode() but recurse on arrays.
 * Example:
 *   $a = array('usr',array('home','dean'));
 *   echo implode_recursive("/",$a);
 *   Will output
 *     usr/home/dean.
 *   While the standard implode would produce.
 *    usr/Array.
 * Parameter
 *  Refer to implode().
 * Return
 *  Refer to implode().
 */
static int PH7_builtin_implode_recursive(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	struct implode_data imp_data;
	int i = 1;
	if( nArg < 1 ){
		/* Missing argument,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Prepare the implode context */
	imp_data.pCtx = pCtx;
	imp_data.bRecursive = 1;
	imp_data.bFirst = 1;
	imp_data.nRecCount = 0;
	if( !ph7_value_is_array(apArg[0]) ){
		imp_data.zSep = ph7_value_to_string(apArg[0],&imp_data.nSeplen);
	}else{
		imp_data.zSep = 0;
		imp_data.nSeplen = 0;
		i = 0;
	}
	ph7_result_string(pCtx,"",0); /* Set an empty stirng */
	/* Start the 'join' process */
	while( i < nArg ){
		if( ph7_value_is_array(apArg[i]) ){
			/* Iterate throw array entries */
			ph7_array_walk(apArg[i],implode_callback,&imp_data);
		}else{
			const char *zData;
			int nLen;
			/* Extract the string representation of the ph7 value */
			zData = ph7_value_to_string(apArg[i],&nLen);
			if( nLen > 0 ){
				if( imp_data.nSeplen > 0 ){
					if( !imp_data.bFirst ){
						/* append the separator first */
						ph7_result_string(pCtx,imp_data.zSep,imp_data.nSeplen);
					}else{
						imp_data.bFirst = 0;
					}
				}
				ph7_result_string(pCtx,zData,nLen);
			}
		}
		i++;
	}
	return PH7_OK;
}
/*
 * array explode(string $delimiter,string $string[,int $limit ])
 *  Returns an array of strings, each of which is a substring of string 
 *  formed by splitting it on boundaries formed by the string delimiter. 
 * Parameters
 *  $delimiter
 *   The boundary string.
 * $string
 *   The input string.
 * $limit
 *   If limit is set and positive, the returned array will contain a maximum
 *   of limit elements with the last element containing the rest of string.
 *   If the limit parameter is negative, all fields except the last -limit are returned.
 *   If the limit parameter is zero, then this is treated as 1.
 * Returns
 *  Returns an array of strings created by splitting the string parameter
 *  on boundaries formed by the delimiter.
 *  If delimiter is an empty string (""), explode() will return FALSE. 
 *  If delimiter contains a value that is not contained in string and a negative
 *  limit is used, then an empty array will be returned, otherwise an array containing string
 *  will be returned. 
 * NOTE:
 *  Negative limit is not supported.
 */
static int PH7_builtin_explode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zDelim,*zString,*zCur,*zEnd;
	int nDelim,nStrlen,iLimit;
	ph7_value *pArray;
	ph7_value *pValue;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the delimiter */
	zDelim = ph7_value_to_string(apArg[0],&nDelim);
	if( nDelim < 1 ){
		/* Empty delimiter,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the string */
	zString = ph7_value_to_string(apArg[1],&nStrlen);
	if( nStrlen < 1 ){
		/* Empty delimiter,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the end of the string */
	zEnd = &zString[nStrlen];
	/* Create the array */
	pArray =  ph7_context_new_array(pCtx);
	pValue = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pValue == 0 ){
		/* Out of memory,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Set a defualt limit */
	iLimit = SXI32_HIGH;
	if( nArg > 2 ){
		iLimit = ph7_value_to_int(apArg[2]);
		 if( iLimit < 0 ){
			iLimit = -iLimit;
		}
		if( iLimit == 0 ){
			iLimit = 1;
		}
		iLimit--;
	}
	/* Start exploding */
	for(;;){
		if( zString >= zEnd ){
			/* No more entry to process */
			break;
		}
		rc = SyBlobSearch(zString,(sxu32)(zEnd-zString),zDelim,nDelim,&nOfft);
		if( rc != SXRET_OK || iLimit <= (int)ph7_array_count(pArray) ){
			/* Limit reached,insert the rest of the string and break */
			if( zEnd > zString ){
				ph7_value_string(pValue,zString,(int)(zEnd-zString));
				ph7_array_add_elem(pArray,0/* Automatic index assign*/,pValue);
			}
			break;
		}
		/* Point to the desired offset */
		zCur = &zString[nOfft];
		if( zCur > zString ){
			/* Perform the store operation */
			ph7_value_string(pValue,zString,(int)(zCur-zString));
			ph7_array_add_elem(pArray,0/* Automatic index assign*/,pValue);
		}
		/* Point beyond the delimiter */
		zString = &zCur[nDelim];
		/* Reset the cursor */
		ph7_value_reset_string_cursor(pValue);
	}
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	/* NOTE that every allocated ph7_value will be automatically 
	 * released as soon we return from this foregin function.
	 */
	return PH7_OK;
}
/*
 * string trim(string $str[,string $charlist ])
 *  Strip whitespace (or other characters) from the beginning and end of a string.
 * Parameters
 *  $str
 *   The string that will be trimmed.
 * $charlist
 *   Optionally, the stripped characters can also be specified using the charlist parameter.
 *   Simply list all characters that you want to be stripped.
 *   With .. you can specify a range of characters.
 * Returns.
 *  Thr processed string.
 * NOTE:
 *   RANGE CHARACTERS [I.E: 'a'..'z'] are not supported.
 */
static int PH7_builtin_trim(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Start the trim process */
	if( nArg < 2 ){
		SyString sStr;
		/* Remove white spaces and NUL bytes */
		SyStringInitFromBuf(&sStr,zString,nLen);
		SyStringFullTrimSafe(&sStr);
		ph7_result_string(pCtx,sStr.zString,(int)sStr.nByte);
	}else{
		/* Char list */
		const char *zList;
		int nListlen;
		zList = ph7_value_to_string(apArg[1],&nListlen);
		if( nListlen < 1 ){
			/* Return the string unchanged */
			ph7_result_string(pCtx,zString,nLen);
		}else{
			const char *zEnd = &zString[nLen];
			const char *zCur = zString;
			const char *zPtr;
			int i;
			/* Left trim */
			for(;;){
				if( zCur >= zEnd ){
					break;
				}
				zPtr = zCur;
				for( i = 0 ; i < nListlen ; i++ ){
					if( zCur < zEnd && zCur[0] == zList[i] ){
						zCur++;
					}
				}
				if( zCur == zPtr ){
					/* No match,break immediately */
					break;
				}
			}
			/* Right trim */
			zEnd--;
			for(;;){
				if( zEnd <= zCur ){
					break;
				}
				zPtr = zEnd;
				for( i = 0 ; i < nListlen ; i++ ){
					if( zEnd > zCur && zEnd[0] == zList[i] ){
						zEnd--;
					}
				}
				if( zEnd == zPtr ){
					break;
				}
			}
			if( zCur >= zEnd ){
				/* Return the empty string */
				ph7_result_string(pCtx,"",0);
			}else{
				zEnd++;
				ph7_result_string(pCtx,zCur,(int)(zEnd-zCur));
			}
		}
	}
	return PH7_OK;
}
/*
 * string rtrim(string $str[,string $charlist ])
 *  Strip whitespace (or other characters) from the end of a string.
 * Parameters
 *  $str
 *   The string that will be trimmed.
 * $charlist
 *   Optionally, the stripped characters can also be specified using the charlist parameter.
 *   Simply list all characters that you want to be stripped.
 *   With .. you can specify a range of characters.
 * Returns.
 *  Thr processed string.
 * NOTE:
 *   RANGE CHARACTERS [I.E: 'a'..'z'] are not supported.
 */
static int PH7_builtin_rtrim(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Start the trim process */
	if( nArg < 2 ){
		SyString sStr;
		/* Remove white spaces and NUL bytes*/
		SyStringInitFromBuf(&sStr,zString,nLen);
		SyStringRightTrimSafe(&sStr);
		ph7_result_string(pCtx,sStr.zString,(int)sStr.nByte);
	}else{
		/* Char list */
		const char *zList;
		int nListlen;
		zList = ph7_value_to_string(apArg[1],&nListlen);
		if( nListlen < 1 ){
			/* Return the string unchanged */
			ph7_result_string(pCtx,zString,nLen);
		}else{
			const char *zEnd = &zString[nLen - 1];
			const char *zCur = zString;
			const char *zPtr;
			int i;
			/* Right trim */
			for(;;){
				if( zEnd <= zCur ){
					break;
				}
				zPtr = zEnd;
				for( i = 0 ; i < nListlen ; i++ ){
					if( zEnd > zCur && zEnd[0] == zList[i] ){
						zEnd--;
					}
				}
				if( zEnd == zPtr ){
					break;
				}
			}
			if( zEnd <= zCur ){
				/* Return the empty string */
				ph7_result_string(pCtx,"",0);
			}else{
				zEnd++;
				ph7_result_string(pCtx,zCur,(int)(zEnd-zCur));
			}
		}
	}
	return PH7_OK;
}
/*
 * string ltrim(string $str[,string $charlist ])
 *  Strip whitespace (or other characters) from the beginning and end of a string.
 * Parameters
 *  $str
 *   The string that will be trimmed.
 * $charlist
 *   Optionally, the stripped characters can also be specified using the charlist parameter.
 *   Simply list all characters that you want to be stripped.
 *   With .. you can specify a range of characters.
 * Returns.
 *  Thr processed string.
 * NOTE:
 *   RANGE CHARACTERS [I.E: 'a'..'z'] are not supported.
 */
static int PH7_builtin_ltrim(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Start the trim process */
	if( nArg < 2 ){
		SyString sStr;
		/* Remove white spaces and NUL byte */
		SyStringInitFromBuf(&sStr,zString,nLen);
		SyStringLeftTrimSafe(&sStr);
		ph7_result_string(pCtx,sStr.zString,(int)sStr.nByte);
	}else{
		/* Char list */
		const char *zList;
		int nListlen;
		zList = ph7_value_to_string(apArg[1],&nListlen);
		if( nListlen < 1 ){
			/* Return the string unchanged */
			ph7_result_string(pCtx,zString,nLen);
		}else{
			const char *zEnd = &zString[nLen];
			const char *zCur = zString;
			const char *zPtr;
			int i;
			/* Left trim */
			for(;;){
				if( zCur >= zEnd ){
					break;
				}
				zPtr = zCur;
				for( i = 0 ; i < nListlen ; i++ ){
					if( zCur < zEnd && zCur[0] == zList[i] ){
						zCur++;
					}
				}
				if( zCur == zPtr ){
					/* No match,break immediately */
					break;
				}
			}
			if( zCur >= zEnd ){
				/* Return the empty string */
				ph7_result_string(pCtx,"",0);
			}else{
				ph7_result_string(pCtx,zCur,(int)(zEnd-zCur));
			}
		}
	}
	return PH7_OK;
}
/*
 * string strtolower(string $str)
 *  Make a string lowercase.
 * Parameters
 *  $str
 *   The input string.
 * Returns.
 *  The lowercased string.
 */
static int PH7_builtin_strtolower(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zCur,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zString[nLen];
	for(;;){
		if( zString >= zEnd ){
			/* No more input,break immediately */
			break;
		}
		if( (unsigned char)zString[0] >= 0xc0 ){
			/* UTF-8 stream,output verbatim */
			zCur = zString;
			zString++;
			while( zString < zEnd && ((unsigned char)zString[0] & 0xc0) == 0x80){
				zString++;
			}
			/* Append UTF-8 stream */
			ph7_result_string(pCtx,zCur,(int)(zString-zCur));
		}else{
			int c = zString[0];
			if( SyisUpper(c) ){
				c = SyToLower(zString[0]);
			}
			/* Append character */
			ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
			/* Advance the cursor */
			zString++;
		}
	}
	return PH7_OK;
}
/*
 * string strtolower(string $str)
 *  Make a string uppercase.
 * Parameters
 *  $str
 *   The input string.
 * Returns.
 *  The uppercased string.
 */
static int PH7_builtin_strtoupper(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zCur,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zString[nLen];
	for(;;){
		if( zString >= zEnd ){
			/* No more input,break immediately */
			break;
		}
		if( (unsigned char)zString[0] >= 0xc0 ){
			/* UTF-8 stream,output verbatim */
			zCur = zString;
			zString++;
			while( zString < zEnd && ((unsigned char)zString[0] & 0xc0) == 0x80){
				zString++;
			}
			/* Append UTF-8 stream */
			ph7_result_string(pCtx,zCur,(int)(zString-zCur));
		}else{
			int c = zString[0];
			if( SyisLower(c) ){
				c = SyToUpper(zString[0]);
			}
			/* Append character */
			ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
			/* Advance the cursor */
			zString++;
		}
	}
	return PH7_OK;
}
/*
 * string ucfirst(string $str)
 *  Returns a string with the first character of str capitalized, if that
 *  character is alphabetic. 
 * Parameters
 *  $str
 *   The input string.
 * Returns.
 *  The processed string.
 */
static int PH7_builtin_ucfirst(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zEnd;
	int nLen,c;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zString[nLen];
	c = zString[0];
	if( SyisLower(c) ){
		c = SyToUpper(c);
	}
	/* Append the first character */
	ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
	zString++;
	if( zString < zEnd ){
		/* Append the rest of the input verbatim */
		ph7_result_string(pCtx,zString,(int)(zEnd-zString));
	}
	return PH7_OK;
}
/*
 * string lcfirst(string $str)
 *  Make a string's first character lowercase.
 * Parameters
 *  $str
 *   The input string.
 * Returns.
 *  The processed string.
 */
static int PH7_builtin_lcfirst(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zEnd;
	int nLen,c;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zString[nLen];
	c = zString[0];
	if( SyisUpper(c) ){
		c = SyToLower(c);
	}
	/* Append the first character */
	ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
	zString++;
	if( zString < zEnd ){
		/* Append the rest of the input verbatim */
		ph7_result_string(pCtx,zString,(int)(zEnd-zString));
	}
	return PH7_OK;
}
/*
 * int ord(string $string)
 *  Returns the ASCII value of the first character of string.
 * Parameters
 *  $str
 *   The input string.
 * Returns.
 *  The ASCII value as an integer.
 */
static int PH7_builtin_ord(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	int nLen,c;
	if( nArg < 1 ){
		/* Missing arguments,return -1 */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return -1 */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	/* Extract the ASCII value of the first character */
	c = zString[0];
	/* Return that value */
	ph7_result_int(pCtx,c);
	return PH7_OK;
}
/*
 * string chr(int $ascii)
 *  Returns a one-character string containing the character specified by ascii.
 * Parameters
 *  $ascii
 *   The ascii code.
 * Returns.
 *  The specified character.
 */
static int PH7_builtin_chr(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int c;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the ASCII value */
	c = ph7_value_to_int(apArg[0]);
	/* Return the specified character */
	ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
	return PH7_OK;
}
/*
 * Binary to hex consumer callback.
 * This callback is the default consumer used by the hash functions
 * [i.e: bin2hex(),md5(),sha1(),md5_file() ... ] defined below.
 */
static int HashConsumer(const void *pData,unsigned int nLen,void *pUserData)
{
	/* Append hex chunk verbatim */
	ph7_result_string((ph7_context *)pUserData,(const char *)pData,(int)nLen);
	return SXRET_OK;
}
/*
 * string bin2hex(string $str)
 *  Convert binary data into hexadecimal representation.
 * Parameters
 *  $str
 *   The input string.
 * Returns.
 *  Returns the hexadecimal representation of the given string.
 */
static int PH7_builtin_bin2hex(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	SyBinToHexConsumer((const void *)zString,(sxu32)nLen,HashConsumer,pCtx);
	return PH7_OK;
}
/* Search callback signature */
typedef sxi32 (*ProcStringMatch)(const void *,sxu32,const void *,sxu32,sxu32 *);
/*
 * Case-insensitive pattern match.
 * Brute force is the default search method used here.
 * This is due to the fact that brute-forcing works quite
 * well for short/medium texts on modern hardware.
 */
static sxi32 iPatternMatch(const void *pText,sxu32 nLen,const void *pPattern,sxu32 iPatLen,sxu32 *pOfft)
{
	const char *zpIn = (const char *)pPattern;
	const char *zIn = (const char *)pText;
	const char *zpEnd = &zpIn[iPatLen];
	const char *zEnd = &zIn[nLen];
	const char *zPtr,*zPtr2;
	int c,d;
	if( iPatLen > nLen ){
		/* Don't bother processing */
		return SXERR_NOTFOUND;
	}
	for(;;){
		if( zIn >= zEnd ){
			break;
		}
		c = SyToLower(zIn[0]);
		d = SyToLower(zpIn[0]);
		if( c == d ){
			zPtr   = &zIn[1];
			zPtr2  = &zpIn[1];
			for(;;){
				if( zPtr2 >= zpEnd ){
					/* Pattern found */
					if( pOfft ){ *pOfft = (sxu32)(zIn-(const char *)pText); }
					return SXRET_OK;
				}
				if( zPtr >= zEnd ){
					break;
				}
				c = SyToLower(zPtr[0]);
				d = SyToLower(zPtr2[0]);
				if( c != d ){
					break;
				}
				zPtr++; zPtr2++;
			}
		}
		zIn++;
	}
	/* Pattern not found */
	return SXERR_NOTFOUND;
}
/*
 * string strstr(string $haystack,string $needle[,bool $before_needle = false ])
 *  Find the first occurrence of a string.
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *   Search pattern (must be a string).
 * $before_needle
 *   If TRUE, strstr() returns the part of the haystack before the first occurrence 
 *   of the needle (excluding the needle).
 * Return
 *  Returns the portion of string, or FALSE if needle is not found.
 */
static int PH7_builtin_strstr(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ProcStringMatch xPatternMatch = SyBlobSearch; /* Case-sensitive pattern match */
	const char *zBlob,*zPattern;
	int nLen,nPatLen;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the needle and the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	zPattern = ph7_value_to_string(apArg[1],&nPatLen);
	nOfft = 0; /* cc warning */
	if( nLen > 0 && nPatLen > 0 ){
		int before = 0;
		/* Perform the lookup */
		rc = xPatternMatch(zBlob,(sxu32)nLen,zPattern,(sxu32)nPatLen,&nOfft);
		if( rc != SXRET_OK ){
			/* Pattern not found,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Return the portion of the string */
		if( nArg > 2 ){
			before = ph7_value_to_int(apArg[2]);
		}
		if( before ){
			ph7_result_string(pCtx,zBlob,(int)(&zBlob[nOfft]-zBlob));
		}else{
			ph7_result_string(pCtx,&zBlob[nOfft],(int)(&zBlob[nLen]-&zBlob[nOfft]));
		}
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * string stristr(string $haystack,string $needle[,bool $before_needle = false ])
 *  Case-insensitive strstr().
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *   Search pattern (must be a string).
 * $before_needle
 *   If TRUE, strstr() returns the part of the haystack before the first occurrence 
 *   of the needle (excluding the needle).
 * Return
 *  Returns the portion of string, or FALSE if needle is not found.
 */
static int PH7_builtin_stristr(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ProcStringMatch xPatternMatch = iPatternMatch; /* Case-insensitive pattern match */
	const char *zBlob,*zPattern;
	int nLen,nPatLen;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the needle and the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	zPattern = ph7_value_to_string(apArg[1],&nPatLen);
	nOfft = 0; /* cc warning */
	if( nLen > 0 && nPatLen > 0 ){
		int before = 0;
		/* Perform the lookup */
		rc = xPatternMatch(zBlob,(sxu32)nLen,zPattern,(sxu32)nPatLen,&nOfft);
		if( rc != SXRET_OK ){
			/* Pattern not found,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Return the portion of the string */
		if( nArg > 2 ){
			before = ph7_value_to_int(apArg[2]);
		}
		if( before ){
			ph7_result_string(pCtx,zBlob,(int)(&zBlob[nOfft]-zBlob));
		}else{
			ph7_result_string(pCtx,&zBlob[nOfft],(int)(&zBlob[nLen]-&zBlob[nOfft]));
		}
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int strpos(string $haystack,string $needle [,int $offset = 0 ] )
 *  Returns the numeric position of the first occurrence of needle in the haystack string.
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *   Search pattern (must be a string).
 * $offset
 *   This optional offset parameter allows you to specify which character in haystack
 *   to start searching. The position returned is still relative to the beginning
 *   of haystack.
 * Return
 *  Returns the position as an integer.If needle is not found, strpos() will return FALSE.
 */
static int PH7_builtin_strpos(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ProcStringMatch xPatternMatch = SyBlobSearch; /* Case-sensitive pattern match */
	const char *zBlob,*zPattern;
	int nLen,nPatLen,nStart;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the needle and the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	zPattern = ph7_value_to_string(apArg[1],&nPatLen);
	nOfft = 0; /* cc warning */
	nStart = 0;
	/* Peek the starting offset if available */
	if( nArg > 2 ){
		nStart = ph7_value_to_int(apArg[2]);
		if( nStart < 0 ){
			nStart = -nStart;
		}
		if( nStart >= nLen ){
			/* Invalid offset */
			nStart = 0;
		}else{
			zBlob += nStart;
			nLen -= nStart;
		}
	}
	if( nLen > 0 && nPatLen > 0 ){
		/* Perform the lookup */
		rc = xPatternMatch(zBlob,(sxu32)nLen,zPattern,(sxu32)nPatLen,&nOfft);
		if( rc != SXRET_OK ){
			/* Pattern not found,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Return the pattern position */
		ph7_result_int64(pCtx,(ph7_int64)(nOfft+nStart));
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int stripos(string $haystack,string $needle [,int $offset = 0 ] )
 *  Case-insensitive strpos.
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *   Search pattern (must be a string).
 * $offset
 *   This optional offset parameter allows you to specify which character in haystack
 *   to start searching. The position returned is still relative to the beginning
 *   of haystack.
 * Return
 *  Returns the position as an integer.If needle is not found, strpos() will return FALSE.
 */
static int PH7_builtin_stripos(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ProcStringMatch xPatternMatch = iPatternMatch; /* Case-insensitive pattern match */
	const char *zBlob,*zPattern;
	int nLen,nPatLen,nStart;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the needle and the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	zPattern = ph7_value_to_string(apArg[1],&nPatLen);
	nOfft = 0; /* cc warning */
	nStart = 0;
	/* Peek the starting offset if available */
	if( nArg > 2 ){
		nStart = ph7_value_to_int(apArg[2]);
		if( nStart < 0 ){
			nStart = -nStart;
		}
		if( nStart >= nLen ){
			/* Invalid offset */
			nStart = 0;
		}else{
			zBlob += nStart;
			nLen -= nStart;
		}
	}
	if( nLen > 0 && nPatLen > 0 ){
		/* Perform the lookup */
		rc = xPatternMatch(zBlob,(sxu32)nLen,zPattern,(sxu32)nPatLen,&nOfft);
		if( rc != SXRET_OK ){
			/* Pattern not found,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Return the pattern position */
		ph7_result_int64(pCtx,(ph7_int64)(nOfft+nStart));
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int strrpos(string $haystack,string $needle [,int $offset = 0 ] )
 *  Find the numeric position of the last occurrence of needle in the haystack string.
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *   Search pattern (must be a string).
 * $offset
 *   If specified, search will start this number of characters counted from the beginning
 *   of the string. If the value is negative, search will instead start from that many 
 *   characters from the end of the string, searching backwards.
 * Return
 *  Returns the position as an integer.If needle is not found, strrpos() will return FALSE.
 */
static int PH7_builtin_strrpos(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zStart,*zBlob,*zPattern,*zPtr,*zEnd;
	ProcStringMatch xPatternMatch = SyBlobSearch; /* Case-sensitive pattern match */
	int nLen,nPatLen;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the needle and the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	zPattern = ph7_value_to_string(apArg[1],&nPatLen);
	/* Point to the end of the pattern */
	zPtr = &zBlob[nLen - 1];
	zEnd = &zBlob[nLen];
	/* Save the starting posistion */
	zStart = zBlob;
	nOfft = 0; /* cc warning */
	/* Peek the starting offset if available */
	if( nArg > 2 ){
		int nStart;
		nStart = ph7_value_to_int(apArg[2]);
		if( nStart < 0 ){
			nStart = -nStart;
			if( nStart >= nLen ){
				/* Invalid offset */
				ph7_result_bool(pCtx,0);
				return PH7_OK;
			}else{
				nLen -= nStart;
				zPtr = &zBlob[nLen - 1];
				zEnd = &zBlob[nLen];
			}
		}else{
			if( nStart >= nLen ){
				/* Invalid offset */
				ph7_result_bool(pCtx,0);
				return PH7_OK;
			}else{
				zBlob += nStart;
				nLen -= nStart;
			}
		}
	}
	if( nLen > 0 && nPatLen > 0 ){
		/* Perform the lookup */
		for(;;){
			if( zBlob >= zPtr ){
				break;
			}
			rc = xPatternMatch((const void *)zPtr,(sxu32)(zEnd-zPtr),(const void *)zPattern,(sxu32)nPatLen,&nOfft);
			if( rc == SXRET_OK ){
				/* Pattern found,return it's position */
				ph7_result_int64(pCtx,(ph7_int64)(&zPtr[nOfft] - zStart));
				return PH7_OK;
			}
			zPtr--;
		}
		/* Pattern not found,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int strripos(string $haystack,string $needle [,int $offset = 0 ] )
 *  Case-insensitive strrpos.
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *   Search pattern (must be a string).
 * $offset
 *   If specified, search will start this number of characters counted from the beginning
 *   of the string. If the value is negative, search will instead start from that many 
 *   characters from the end of the string, searching backwards.
 * Return
 *  Returns the position as an integer.If needle is not found, strrpos() will return FALSE.
 */
static int PH7_builtin_strripos(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zStart,*zBlob,*zPattern,*zPtr,*zEnd;
	ProcStringMatch xPatternMatch = iPatternMatch; /* Case-insensitive pattern match */
	int nLen,nPatLen;
	sxu32 nOfft;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the needle and the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	zPattern = ph7_value_to_string(apArg[1],&nPatLen);
	/* Point to the end of the pattern */
	zPtr = &zBlob[nLen - 1];
	zEnd = &zBlob[nLen];
	/* Save the starting posistion */
	zStart = zBlob;
	nOfft = 0; /* cc warning */
	/* Peek the starting offset if available */
	if( nArg > 2 ){
		int nStart;
		nStart = ph7_value_to_int(apArg[2]);
		if( nStart < 0 ){
			nStart = -nStart;
			if( nStart >= nLen ){
				/* Invalid offset */
				ph7_result_bool(pCtx,0);
				return PH7_OK;
			}else{
				nLen -= nStart;
				zPtr = &zBlob[nLen - 1];
				zEnd = &zBlob[nLen];
			}
		}else{
			if( nStart >= nLen ){
				/* Invalid offset */
				ph7_result_bool(pCtx,0);
				return PH7_OK;
			}else{
				zBlob += nStart;
				nLen -= nStart;
			}
		}
	}
	if( nLen > 0 && nPatLen > 0 ){
		/* Perform the lookup */
		for(;;){
			if( zBlob >= zPtr ){
				break;
			}
			rc = xPatternMatch((const void *)zPtr,(sxu32)(zEnd-zPtr),(const void *)zPattern,(sxu32)nPatLen,&nOfft);
			if( rc == SXRET_OK ){
				/* Pattern found,return it's position */
				ph7_result_int64(pCtx,(ph7_int64)(&zPtr[nOfft] - zStart));
				return PH7_OK;
			}
			zPtr--;
		}
		/* Pattern not found,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * int strrchr(string $haystack,mixed $needle)
 *  Find the last occurrence of a character in a string.
 * Parameters
 *  $haystack
 *   The input string.
 * $needle
 *  If needle contains more than one character, only the first is used.
 *  This behavior is different from that of strstr().
 *  If needle is not a string, it is converted to an integer and applied
 *  as the ordinal value of a character.
 * Return
 *  This function returns the portion of string, or FALSE if needle is not found.
 */
static int PH7_builtin_strrchr(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zBlob;
	int nLen,c;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the haystack */
	zBlob = ph7_value_to_string(apArg[0],&nLen);
	c = 0; /* cc warning */
	if( nLen > 0 ){
		sxu32 nOfft;
		sxi32 rc;
		if( ph7_value_is_string(apArg[1]) ){
			const char *zPattern;
			zPattern = ph7_value_to_string(apArg[1],0); /* Never fail,so there is no need to check
														 * for NULL pointer.
														 */
			c = zPattern[0];
		}else{
			/* Int cast */
			c = ph7_value_to_int(apArg[1]);
		}
		/* Perform the lookup */
		rc = SyByteFind2(zBlob,(sxu32)nLen,c,&nOfft);
		if( rc != SXRET_OK ){
			/* No such entry,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Return the string portion */
		ph7_result_string(pCtx,&zBlob[nOfft],(int)(&zBlob[nLen]-&zBlob[nOfft]));
	}else{
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * string strrev(string $string)
 *  Reverse a string.
 * Parameters
 *  $string
 *   String to be reversed.
 * Return
 *  The reversed string.
 */
static int PH7_builtin_strrev(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn,*zEnd;
	int nLen,c;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string Return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zIn[nLen - 1];
	for(;;){
		if( zEnd < zIn ){
			/* No more input to process */
			break;
		}
		/* Append current character */
		c = zEnd[0];
		ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
		zEnd--;
	}
	return PH7_OK;
}
/*
 * string ucwords(string $string)
 *  Uppercase the first character of each word in a string.
 *  The definition of a word is any string of characters that is immediately after
 *  a whitespace (These are: space, form-feed, newline, carriage return, horizontal tab, and vertical tab). 
 * Parameters
 *  $string
 *   The input string.
 * Return
 *  The modified string..
 */
static int PH7_builtin_ucwords(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn,*zCur,*zEnd;
	int nLen,c;
	if( nArg < 1 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string Return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Perform the requested operation */
	zEnd = &zIn[nLen];
	for(;;){
		/* Jump leading white spaces */
		zCur = zIn;
		while( zIn < zEnd && (unsigned char)zIn[0] < 0x80 && SyisSpace(zIn[0]) ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Append white space stream */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		c = zIn[0];
		if( c < 0x80 && SyisLower(c) ){
			c = SyToUpper(c);
		}
		/* Append the upper-cased character */
		ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
		zIn++;
		zCur = zIn;
		/* Append the word varbatim */
		while( zIn < zEnd ){
			if( (unsigned char)zIn[0] >= 0xc0 ){
				/* UTF-8 stream */
				zIn++;
				SX_JMP_UTF8(zIn,zEnd);
			}else if( !SyisSpace(zIn[0]) ){
				zIn++;
			}else{
				break;
			}
		}
		if( zCur < zIn ){
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
	}
	return PH7_OK;
}
/*
 * string str_repeat(string $input,int $multiplier)
 *  Returns input repeated multiplier times.
 * Parameters
 *  $string
 *   String to be repeated.
 * $multiplier
 *  Number of time the input string should be repeated.
 *  multiplier has to be greater than or equal to 0. If the multiplier is set
 *  to 0, the function will return an empty string.
 * Return
 *  The repeated string.
 */
static int PH7_builtin_str_repeat(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn;
	int nLen,nMul;
	int rc;
	if( nArg < 2 ){
		/* Missing arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string.Return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the multiplier */
	nMul = ph7_value_to_int(apArg[1]);
	if( nMul < 1 ){
		/* Return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( !nMul ){
			break;
		}
		/* Append the copy */
		rc = ph7_result_string(pCtx,zIn,nLen);
		if( rc != PH7_OK ){
			/* Out of memory,break immediately */
			break;
		}
		nMul--;
	}
	return PH7_OK;
}
/*
 * string nl2br(string $string[,bool $is_xhtml = true ])
 *  Inserts HTML line breaks before all newlines in a string.
 * Parameters
 *  $string
 *   The input string.
 * $is_xhtml
 *   Whenever to use XHTML compatible line breaks or not.
 * Return
 *  The processed string.
 */
static int PH7_builtin_nl2br(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn,*zCur,*zEnd;
	int is_xhtml = 0;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg > 1 ){
		is_xhtml = ph7_value_to_bool(apArg[1]);
	}
	zEnd = &zIn[nLen];
	/* Perform the requested operation */
	for(;;){
		zCur = zIn;
		/* Delimit the string */
		while( zIn < zEnd && (zIn[0] != '\n'&& zIn[0] != '\r') ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Output chunk verbatim */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		/* Output the HTML line break */
		if( is_xhtml ){
			ph7_result_string(pCtx,"<br>",(int)sizeof("<br>")-1);
		}else{
			ph7_result_string(pCtx,"<br/>",(int)sizeof("<br/>")-1);
		}
		zCur = zIn;
		/* Append trailing line */
		while( zIn < zEnd && (zIn[0] == '\n'  || zIn[0] == '\r') ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Output chunk verbatim */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
	}
	return PH7_OK;
}
/*
 * Format a given string and invoke the given callback on each processed chunk.
 *  According to the PHP reference manual.
 * The format string is composed of zero or more directives: ordinary characters
 * (excluding %) that are copied directly to the result, and conversion 
 * specifications, each of which results in fetching its own parameter.
 * This applies to both sprintf() and printf().
 * Each conversion specification consists of a percent sign (%), followed by one
 * or more of these elements, in order:
 *   An optional sign specifier that forces a sign (- or +) to be used on a number.
 *   By default, only the - sign is used on a number if it's negative. This specifier forces
 *   positive numbers to have the + sign attached as well.
 *   An optional padding specifier that says what character will be used for padding
 *   the results to the right string size. This may be a space character or a 0 (zero character).
 *   The default is to pad with spaces. An alternate padding character can be specified by prefixing
 *   it with a single quote ('). See the examples below.
 *   An optional alignment specifier that says if the result should be left-justified or right-justified.
 *   The default is right-justified; a - character here will make it left-justified.
 *   An optional number, a width specifier that says how many characters (minimum) this conversion
 *   should result in.
 *   An optional precision specifier in the form of a period (`.') followed by an optional decimal
 *   digit string that says how many decimal digits should be displayed for floating-point numbers.
 *   When using this specifier on a string, it acts as a cutoff point, setting a maximum character
 *   limit to the string.
 *  A type specifier that says what type the argument data should be treated as. Possible types:
 *       % - a literal percent character. No argument is required.
 *       b - the argument is treated as an integer, and presented as a binary number.
 *       c - the argument is treated as an integer, and presented as the character with that ASCII value.
 *       d - the argument is treated as an integer, and presented as a (signed) decimal number.
 *       e - the argument is treated as scientific notation (e.g. 1.2e+2). The precision specifier stands 
 * 	     for the number of digits after the decimal point.
 *       E - like %e but uses uppercase letter (e.g. 1.2E+2).
 *       u - the argument is treated as an integer, and presented as an unsigned decimal number.
 *       f - the argument is treated as a float, and presented as a floating-point number (locale aware).
 *       F - the argument is treated as a float, and presented as a floating-point number (non-locale aware).
 *       g - shorter of %e and %f.
 *       G - shorter of %E and %f.
 *       o - the argument is treated as an integer, and presented as an octal number.
 *       s - the argument is treated as and presented as a string.
 *       x - the argument is treated as an integer and presented as a hexadecimal number (with lowercase letters).
 *       X - the argument is treated as an integer and presented as a hexadecimal number (with uppercase letters).
 */
/*
 * This implementation is based on the one found in the SQLite3 source tree.
 */
#define PH7_FMT_BUFSIZ 1024 /* Conversion buffer size */
/*
** Conversion types fall into various categories as defined by the
** following enumeration.
*/
#define PH7_FMT_RADIX       1 /* Integer types.%d, %x, %o, and so forth */
#define PH7_FMT_FLOAT       2 /* Floating point.%f */
#define PH7_FMT_EXP         3 /* Exponentional notation.%e and %E */
#define PH7_FMT_GENERIC     4 /* Floating or exponential, depending on exponent.%g */
#define PH7_FMT_SIZE        5 /* Total number of characters processed so far.%n */
#define PH7_FMT_STRING      6 /* Strings.%s */
#define PH7_FMT_PERCENT     7 /* Percent symbol.%% */
#define PH7_FMT_CHARX       8 /* Characters.%c */
#define PH7_FMT_ERROR       9 /* Used to indicate no such conversion type */
/*
** Allowed values for ph7_fmt_info.flags
*/
#define PH7_FMT_FLAG_SIGNED	  0x01
#define PH7_FMT_FLAG_UNSIGNED 0x02
/*
** Each builtin conversion character (ex: the 'd' in "%d") is described
** by an instance of the following structure
*/
typedef struct ph7_fmt_info ph7_fmt_info;
struct ph7_fmt_info
{
  char fmttype;  /* The format field code letter [i.e: 'd','s','x'] */
  sxu8 base;     /* The base for radix conversion */
  int flags;    /* One or more of PH7_FMT_FLAG_ constants below */
  sxu8 type;     /* Conversion paradigm */
  char *charset; /* The character set for conversion */
  char *prefix;  /* Prefix on non-zero values in alt format */
};
#ifndef PH7_OMIT_FLOATING_POINT
/*
** "*val" is a double such that 0.1 <= *val < 10.0
** Return the ascii code for the leading digit of *val, then
** multiply "*val" by 10.0 to renormalize.
**
** Example:
**     input:     *val = 3.14159
**     output:    *val = 1.4159    function return = '3'
**
** The counter *cnt is incremented each time.  After counter exceeds
** 16 (the number of significant digits in a 64-bit float) '0' is
** always returned.
*/
static int vxGetdigit(sxlongreal *val,int *cnt)
{
  sxlongreal d;
  int digit;

  if( (*cnt)++ >= 16 ){
	  return '0';
  }
  digit = (int)*val;
  d = digit;
   *val = (*val - d)*10.0;
  return digit + '0' ;
}
#endif /* PH7_OMIT_FLOATING_POINT */
/*
 * The following table is searched linearly, so it is good to put the most frequently
 * used conversion types first.
 */
static const ph7_fmt_info aFmt[] = {
  {  'd', 10, PH7_FMT_FLAG_SIGNED, PH7_FMT_RADIX, "0123456789",0    },
  {  's',  0, 0, PH7_FMT_STRING,     0,                  0    },
  {  'c',  0, 0, PH7_FMT_CHARX,      0,                  0    },
  {  'x', 16, 0, PH7_FMT_RADIX,      "0123456789abcdef", "x0" },
  {  'X', 16, 0, PH7_FMT_RADIX,      "0123456789ABCDEF", "X0" },
  {  'b',  2, 0, PH7_FMT_RADIX,      "01",                "b0"},
  {  'o',  8, 0, PH7_FMT_RADIX,      "01234567",         "0"  },
  {  'u', 10, 0, PH7_FMT_RADIX,      "0123456789",       0    },
  {  'f',  0, PH7_FMT_FLAG_SIGNED, PH7_FMT_FLOAT,        0,    0    },
  {  'F',  0, PH7_FMT_FLAG_SIGNED, PH7_FMT_FLOAT,        0,    0    },
  {  'e',  0, PH7_FMT_FLAG_SIGNED, PH7_FMT_EXP,        "e",    0    },
  {  'E',  0, PH7_FMT_FLAG_SIGNED, PH7_FMT_EXP,        "E",    0    },
  {  'g',  0, PH7_FMT_FLAG_SIGNED, PH7_FMT_GENERIC,    "e",    0    },
  {  'G',  0, PH7_FMT_FLAG_SIGNED, PH7_FMT_GENERIC,    "E",    0    },
  {  '%',  0, 0, PH7_FMT_PERCENT,    0,                  0    }
};
/*
 * Format a given string.
 * The root program.  All variations call this core.
 * INPUTS:
 *   xConsumer   This is a pointer to a function taking four arguments
 *            1. A pointer to the call context.
 *            2. A pointer to the list of characters to be output
 *               (Note, this list is NOT null terminated.)
 *            3. An integer number of characters to be output.
 *               (Note: This number might be zero.)
 *            4. Upper layer private data.
 *   zIn       This is the format string, as in the usual print.
 *   apArg     This is a pointer to a list of arguments.
 */
PH7_PRIVATE sxi32 PH7_InputFormat(
	int (*xConsumer)(ph7_context *,const char *,int,void *), /* Format consumer */
	ph7_context *pCtx,  /* call context */
	const char *zIn,    /* Format string */
	int nByte,          /* Format string length */
	int nArg,           /* Total argument of the given arguments */
	ph7_value **apArg,  /* User arguments */
	void *pUserData,    /* Last argument to xConsumer() */
	int vf              /* TRUE if called from vfprintf,vsprintf context */ 
	)
{
	char spaces[] = "                                                  ";
#define etSPACESIZE ((int)sizeof(spaces)-1)
	const char *zCur,*zEnd = &zIn[nByte];
	char *zBuf,zWorker[PH7_FMT_BUFSIZ];       /* Working buffer */
	const ph7_fmt_info *pInfo;  /* Pointer to the appropriate info structure */
	int flag_alternateform; /* True if "#" flag is present */
	int flag_leftjustify;   /* True if "-" flag is present */
	int flag_blanksign;     /* True if " " flag is present */
	int flag_plussign;      /* True if "+" flag is present */
	int flag_zeropad;       /* True if field width constant starts with zero */
	ph7_value *pArg;         /* Current processed argument */
	ph7_int64 iVal;
	int precision;           /* Precision of the current field */
	char *zExtra;  
	int c,rc,n;
	int length;              /* Length of the field */
	int prefix;
	sxu8 xtype;              /* Conversion paradigm */
	int width;               /* Width of the current field */
	int idx;
	n = (vf == TRUE) ? 0 : 1;
#define NEXT_ARG	( n < nArg ? apArg[n++] : 0 )
	/* Start the format process */
	for(;;){
		zCur = zIn;
		while( zIn < zEnd && zIn[0] != '%' ){
			zIn++;
		}
		if( zCur < zIn ){
			/* Consume chunk verbatim */
			rc = xConsumer(pCtx,zCur,(int)(zIn-zCur),pUserData);
			if( rc == SXERR_ABORT ){
				/* Callback request an operation abort */
				break;
			}
		}
		if( zIn >= zEnd ){
			/* No more input to process,break immediately */
			break;
		}
		/* Find out what flags are present */
		flag_leftjustify = flag_plussign = flag_blanksign = 
			flag_alternateform = flag_zeropad = 0;
		zIn++; /* Jump the precent sign */
		do{
			c = zIn[0];
			switch( c ){
			case '-':   flag_leftjustify = 1;     c = 0;   break;
			case '+':   flag_plussign = 1;        c = 0;   break;
			case ' ':   flag_blanksign = 1;       c = 0;   break;
			case '#':   flag_alternateform = 1;   c = 0;   break;
			case '0':   flag_zeropad = 1;         c = 0;   break;
			case '\'':
				zIn++;
				if( zIn < zEnd ){
					/* An alternate padding character can be specified by prefixing it with a single quote (') */
					c = zIn[0];
					for(idx = 0 ; idx < etSPACESIZE ; ++idx ){
						spaces[idx] = (char)c;
					}
					c = 0;
				}
				break;
			default:                                       break;
			}
		}while( c==0 && (zIn++ < zEnd) );
		/* Get the field width */
		width = 0;
		while( zIn < zEnd && ( zIn[0] >='0' && zIn[0] <='9') ){
			width = width*10 + (zIn[0] - '0');
			zIn++;
		}
		if( zIn < zEnd && zIn[0] == '$' ){
			/* Position specifer */
			if( width > 0 ){
				n = width;
				if( vf && n > 0 ){ 
					n--;
				}
			}
			zIn++;
			width = 0;
			if( zIn < zEnd && zIn[0] == '0' ){
				flag_zeropad = 1;
				zIn++;
			}
			while( zIn < zEnd && ( zIn[0] >='0' && zIn[0] <='9') ){
				width = width*10 + (zIn[0] - '0');
				zIn++;
			}
		}
		if( width > PH7_FMT_BUFSIZ-10 ){
			width = PH7_FMT_BUFSIZ-10;
		}
		/* Get the precision */
		precision = -1;
		if( zIn < zEnd && zIn[0] == '.' ){
			precision = 0;
			zIn++;
			while( zIn < zEnd && ( zIn[0] >='0' && zIn[0] <='9') ){
				precision = precision*10 + (zIn[0] - '0');
				zIn++;
			}
		}
		if( zIn >= zEnd ){
			/* No more input */
			break;
		}
		/* Fetch the info entry for the field */
		pInfo = 0;
		xtype = PH7_FMT_ERROR;
		c = zIn[0];
		zIn++; /* Jump the format specifer */
		for(idx=0; idx< (int)SX_ARRAYSIZE(aFmt); idx++){
			if( c==aFmt[idx].fmttype ){
				pInfo = &aFmt[idx];
				xtype = pInfo->type;
				break;
			}
		}
		zBuf = zWorker; /* Point to the working buffer */
		length = 0;
		zExtra = 0;
		 /*
		  ** At this point, variables are initialized as follows:
		  **
		  **   flag_alternateform          TRUE if a '#' is present.
		  **   flag_plussign               TRUE if a '+' is present.
		  **   flag_leftjustify            TRUE if a '-' is present or if the
		  **                               field width was negative.
		  **   flag_zeropad                TRUE if the width began with 0.
		  **                               the conversion character.
		  **   flag_blanksign              TRUE if a ' ' is present.
		  **   width                       The specified field width.  This is
		  **                               always non-negative.  Zero is the default.
		  **   precision                   The specified precision.  The default
		  **                               is -1.
		  */
		switch(xtype){
		case PH7_FMT_PERCENT:
			/* A literal percent character */
			zWorker[0] = '%';
			length = (int)sizeof(char);
			break;
		case PH7_FMT_CHARX:
			/* The argument is treated as an integer, and presented as the character
			 * with that ASCII value
			 */
			pArg = NEXT_ARG;
			if( pArg == 0 ){
				c = 0;
			}else{
				c = ph7_value_to_int(pArg);
			}
			/* NUL byte is an acceptable value */
			zWorker[0] = (char)c;
			length = (int)sizeof(char);
			break;
		case PH7_FMT_STRING:
			/* the argument is treated as and presented as a string */
			pArg = NEXT_ARG;
			if( pArg == 0 ){
				length = 0;
			}else{
				zBuf = (char *)ph7_value_to_string(pArg,&length);
			}
			if( length < 1 ){
				zBuf = " ";
				length = (int)sizeof(char);
			}
			if( precision>=0 && precision<length ){
				length = precision;
			}
			if( flag_zeropad ){
				/* zero-padding works on strings too */
				for(idx = 0 ; idx < etSPACESIZE ; ++idx ){
					spaces[idx] = '0';
				}
			}
			break;
		case PH7_FMT_RADIX:
			pArg = NEXT_ARG;
			if( pArg == 0 ){
				iVal = 0;
			}else{
				iVal = ph7_value_to_int64(pArg);
			}
			/* Limit the precision to prevent overflowing buf[] during conversion */
			if( precision>PH7_FMT_BUFSIZ-40 ){
				precision = PH7_FMT_BUFSIZ-40;
			}
#if 1
        /* For the format %#x, the value zero is printed "0" not "0x0".
        ** I think this is stupid.*/
        if( iVal==0 ) flag_alternateform = 0;
#else
        /* More sensible: turn off the prefix for octal (to prevent "00"),
        ** but leave the prefix for hex.*/
        if( iVal==0 && pInfo->base==8 ) flag_alternateform = 0;
#endif
        if( pInfo->flags & PH7_FMT_FLAG_SIGNED ){
          if( iVal<0 ){ 
            iVal = -iVal;
			/* Ticket 1433-003 */
			if( iVal < 0 ){
				/* Overflow */
				iVal= 0x7FFFFFFFFFFFFFFF;
			}
            prefix = '-';
          }else if( flag_plussign )  prefix = '+';
          else if( flag_blanksign )  prefix = ' ';
          else                       prefix = 0;
        }else{
			if( iVal<0 ){
				iVal = -iVal;
				/* Ticket 1433-003 */
				if( iVal < 0 ){
					/* Overflow */
					iVal= 0x7FFFFFFFFFFFFFFF;
				}
			}
			prefix = 0;
		}
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        zBuf = &zWorker[PH7_FMT_BUFSIZ-1];
        {
          register char *cset;      /* Use registers for speed */
          register int base;
          cset = pInfo->charset;
          base = pInfo->base;
          do{                                           /* Convert to ascii */
            *(--zBuf) = cset[iVal%base];
            iVal = iVal/base;
          }while( iVal>0 );
        }
        length = &zWorker[PH7_FMT_BUFSIZ-1]-zBuf;
        for(idx=precision-length; idx>0; idx--){
          *(--zBuf) = '0';                             /* Zero pad */
        }
        if( prefix ) *(--zBuf) = (char)prefix;               /* Add sign */
        if( flag_alternateform && pInfo->prefix ){      /* Add "0" or "0x" */
          char *pre, x;
          pre = pInfo->prefix;
          if( *zBuf!=pre[0] ){
            for(pre=pInfo->prefix; (x=(*pre))!=0; pre++) *(--zBuf) = x;
          }
        }
        length = &zWorker[PH7_FMT_BUFSIZ-1]-zBuf;
		break;
		case PH7_FMT_FLOAT:
		case PH7_FMT_EXP:
		case PH7_FMT_GENERIC:{
#ifndef PH7_OMIT_FLOATING_POINT
		long double realvalue;
		int  exp;                /* exponent of real numbers */
		double rounder;          /* Used for rounding floating point values */
		int flag_dp;            /* True if decimal point should be shown */
		int flag_rtz;           /* True if trailing zeros should be removed */
		int flag_exp;           /* True to force display of the exponent */
		int nsd;                 /* Number of significant digits returned */
		pArg = NEXT_ARG;
		if( pArg == 0 ){
			realvalue = 0;
		}else{
			realvalue = ph7_value_to_double(pArg);
		}
        if( precision<0 ) precision = 6;         /* Set default precision */
        if( precision>PH7_FMT_BUFSIZ-40) precision = PH7_FMT_BUFSIZ-40;
        if( realvalue<0.0 ){
          realvalue = -realvalue;
          prefix = '-';
        }else{
          if( flag_plussign )          prefix = '+';
          else if( flag_blanksign )    prefix = ' ';
          else                         prefix = 0;
        }
        if( pInfo->type==PH7_FMT_GENERIC && precision>0 ) precision--;
        rounder = 0.0;
#if 0
        /* Rounding works like BSD when the constant 0.4999 is used.Wierd! */
        for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
#else
        /* It makes more sense to use 0.5 */
        for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1);
#endif
        if( pInfo->type==PH7_FMT_FLOAT ) realvalue += rounder;
        /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
        exp = 0;
        if( realvalue>0.0 ){
          while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
          while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
          while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; }
          while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; }
          if( exp>350 || exp<-350 ){
            zBuf = "NaN";
            length = 3;
            break;
          }
        }
        zBuf = zWorker;
        /*
        ** If the field type is etGENERIC, then convert to either etEXP
        ** or etFLOAT, as appropriate.
        */
        flag_exp = xtype==PH7_FMT_EXP;
        if( xtype!=PH7_FMT_FLOAT ){
          realvalue += rounder;
          if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
        }
        if( xtype==PH7_FMT_GENERIC ){
          flag_rtz = !flag_alternateform;
          if( exp<-4 || exp>precision ){
            xtype = PH7_FMT_EXP;
          }else{
            precision = precision - exp;
            xtype = PH7_FMT_FLOAT;
          }
        }else{
          flag_rtz = 0;
        }
        /*
        ** The "exp+precision" test causes output to be of type etEXP if
        ** the precision is too large to fit in buf[].
        */
        nsd = 0;
        if( xtype==PH7_FMT_FLOAT && exp+precision<PH7_FMT_BUFSIZ-30 ){
          flag_dp = (precision>0 || flag_alternateform);
          if( prefix ) *(zBuf++) = (char)prefix;         /* Sign */
          if( exp<0 )  *(zBuf++) = '0';            /* Digits before "." */
          else for(; exp>=0; exp--) *(zBuf++) = (char)vxGetdigit(&realvalue,&nsd);
          if( flag_dp ) *(zBuf++) = '.';           /* The decimal point */
          for(exp++; exp<0 && precision>0; precision--, exp++){
            *(zBuf++) = '0';
          }
          while( (precision--)>0 ) *(zBuf++) = (char)vxGetdigit(&realvalue,&nsd);
          *(zBuf--) = 0;                           /* Null terminate */
          if( flag_rtz && flag_dp ){     /* Remove trailing zeros and "." */
            while( zBuf>=zWorker && *zBuf=='0' ) *(zBuf--) = 0;
            if( zBuf>=zWorker && *zBuf=='.' ) *(zBuf--) = 0;
          }
          zBuf++;                            /* point to next free slot */
        }else{    /* etEXP or etGENERIC */
          flag_dp = (precision>0 || flag_alternateform);
          if( prefix ) *(zBuf++) = (char)prefix;   /* Sign */
          *(zBuf++) = (char)vxGetdigit(&realvalue,&nsd);  /* First digit */
          if( flag_dp ) *(zBuf++) = '.';     /* Decimal point */
          while( (precision--)>0 ) *(zBuf++) = (char)vxGetdigit(&realvalue,&nsd);
          zBuf--;                            /* point to last digit */
          if( flag_rtz && flag_dp ){          /* Remove tail zeros */
            while( zBuf>=zWorker && *zBuf=='0' ) *(zBuf--) = 0;
            if( zBuf>=zWorker && *zBuf=='.' ) *(zBuf--) = 0;
          }
          zBuf++;                            /* point to next free slot */
          if( exp || flag_exp ){
            *(zBuf++) = pInfo->charset[0];
            if( exp<0 ){ *(zBuf++) = '-'; exp = -exp; } /* sign of exp */
            else       { *(zBuf++) = '+'; }
            if( exp>=100 ){
              *(zBuf++) = (char)((exp/100)+'0');                /* 100's digit */
              exp %= 100;
            }
            *(zBuf++) = (char)(exp/10+'0');                     /* 10's digit */
            *(zBuf++) = (char)(exp%10+'0');                     /* 1's digit */
          }
        }
        /* The converted number is in buf[] and zero terminated.Output it.
        ** Note that the number is in the usual order, not reversed as with
        ** integer conversions.*/
        length = (int)(zBuf-zWorker);
        zBuf = zWorker;
        /* Special case:  Add leading zeros if the flag_zeropad flag is
        ** set and we are not left justified */
        if( flag_zeropad && !flag_leftjustify && length < width){
          int i;
          int nPad = width - length;
          for(i=width; i>=nPad; i--){
            zBuf[i] = zBuf[i-nPad];
          }
          i = prefix!=0;
          while( nPad-- ) zBuf[i++] = '0';
          length = width;
        }
#else
         zBuf = " ";
		 length = (int)sizeof(char);
#endif /* PH7_OMIT_FLOATING_POINT */
		 break;
							 }
		default:
			/* Invalid format specifer */
			zWorker[0] = '?';
			length = (int)sizeof(char);
			break;
		}
		 /*
		 ** The text of the conversion is pointed to by "zBuf" and is
		 ** "length" characters long.The field width is "width".Do
		 ** the output.
		 */
    if( !flag_leftjustify ){
      register int nspace;
      nspace = width-length;
      if( nspace>0 ){
        while( nspace>=etSPACESIZE ){
			rc = xConsumer(pCtx,spaces,etSPACESIZE,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
			nspace -= etSPACESIZE;
        }
        if( nspace>0 ){
			rc = xConsumer(pCtx,spaces,(unsigned int)nspace,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
		}
      }
    }
    if( length>0 ){
		rc = xConsumer(pCtx,zBuf,(unsigned int)length,pUserData);
		if( rc != SXRET_OK ){
		  return SXERR_ABORT; /* Consumer routine request an operation abort */
		}
    }
    if( flag_leftjustify ){
      register int nspace;
      nspace = width-length;
      if( nspace>0 ){
        while( nspace>=etSPACESIZE ){
			rc = xConsumer(pCtx,spaces,etSPACESIZE,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
			nspace -= etSPACESIZE;
        }
        if( nspace>0 ){
			rc = xConsumer(pCtx,spaces,(unsigned int)nspace,pUserData);
			if( rc != SXRET_OK ){
				return SXERR_ABORT; /* Consumer routine request an operation abort */
			}
		}
      }
    }
 }/* for(;;) */
	return SXRET_OK;
}
/*
 * Callback [i.e: Formatted input consumer] of the sprintf function.
 */
static int sprintfConsumer(ph7_context *pCtx,const char *zInput,int nLen,void *pUserData)
{
	/* Consume directly */
	ph7_result_string(pCtx,zInput,nLen);
	SXUNUSED(pUserData); /* cc warning */
	return PH7_OK;
}
/*
 * string sprintf(string $format[,mixed $args [, mixed $... ]])
 *  Return a formatted string.
 * Parameters
 *  $format 
 *    The format string (see block comment above)
 * Return
 *  A string produced according to the formatting string format. 
 */
static int PH7_builtin_sprintf(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFormat;
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the string format */
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Format the string */
	PH7_InputFormat(sprintfConsumer,pCtx,zFormat,nLen,nArg,apArg,0,FALSE);
	return PH7_OK;
}
/*
 * Callback [i.e: Formatted input consumer] of the printf function.
 */
static int printfConsumer(ph7_context *pCtx,const char *zInput,int nLen,void *pUserData)
{
	ph7_int64 *pCounter = (ph7_int64 *)pUserData;
	/* Call the VM output consumer directly */
	ph7_context_output(pCtx,zInput,nLen);
	/* Increment counter */
	*pCounter += nLen;
	return PH7_OK;
}
/*
 * int64 printf(string $format[,mixed $args[,mixed $... ]])
 *  Output a formatted string.
 * Parameters
 *  $format
 *   See sprintf() for a description of format.
 * Return
 *  The length of the outputted string.
 */
static int PH7_builtin_printf(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_int64 nCounter = 0;
	const char *zFormat;
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the string format */
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Format the string */
	PH7_InputFormat(printfConsumer,pCtx,zFormat,nLen,nArg,apArg,(void *)&nCounter,FALSE);
	/* Return the length of the outputted string */
	ph7_result_int64(pCtx,nCounter);
	return PH7_OK;
}
/*
 * int vprintf(string $format,array $args)
 *  Output a formatted string.
 * Parameters
 *  $format
 *   See sprintf() for a description of format.
 * Return
 *  The length of the outputted string.
 */
static int PH7_builtin_vprintf(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_int64 nCounter = 0;
	const char *zFormat;
	ph7_hashmap *pMap;
	SySet sArg;
	int nLen,n;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_array(apArg[1]) ){
		/* Missing/Invalid arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the string format */
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Point to the hashmap */
	pMap = (ph7_hashmap *)apArg[1]->x.pOther;
	/* Extract arguments from the hashmap */
	n = PH7_HashmapValuesToSet(pMap,&sArg);
	/* Format the string */
	PH7_InputFormat(printfConsumer,pCtx,zFormat,nLen,n,(ph7_value **)SySetBasePtr(&sArg),(void *)&nCounter,TRUE);
	/* Return the length of the outputted string */
	ph7_result_int64(pCtx,nCounter);
	/* Release the container */
	SySetRelease(&sArg);
	return PH7_OK;
}
/*
 * int vsprintf(string $format,array $args)
 *  Output a formatted string.
 * Parameters
 *  $format
 *   See sprintf() for a description of format.
 * Return
 *  A string produced according to the formatting string format.
 */
static int PH7_builtin_vsprintf(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFormat;
	ph7_hashmap *pMap;
	SySet sArg;
	int nLen,n;
	if( nArg < 2 || !ph7_value_is_string(apArg[0]) || !ph7_value_is_array(apArg[1]) ){
		/* Missing/Invalid arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the string format */
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Point to hashmap */
	pMap = (ph7_hashmap *)apArg[1]->x.pOther;
	/* Extract arguments from the hashmap */
	n = PH7_HashmapValuesToSet(pMap,&sArg);
	/* Format the string */
	PH7_InputFormat(sprintfConsumer,pCtx,zFormat,nLen,n,(ph7_value **)SySetBasePtr(&sArg),0,TRUE);
	/* Release the container */
	SySetRelease(&sArg);
	return PH7_OK;
}
/*
 * Symisc eXtension.
 * string size_format(int64 $size)
 *  Return a smart string represenation of the given size [i.e: 64-bit integer]
 *  Example:
 *    echo size_format(1*1024*1024*1024);// 1GB
 *    echo size_format(512*1024*1024); // 512 MB
 *    echo size_format(file_size(/path/to/my/file_8192)); //8KB
 * Parameter
 *  $size
 *    Entity size in bytes.
 * Return
 *   Formatted string representation of the given size.
 */
static int PH7_builtin_size_format(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	/*Kilo*/ /*Mega*/ /*Giga*/ /*Tera*/ /*Peta*/ /*Exa*/ /*Zeta*/
	static const char zUnit[] = {"KMGTPEZ"};
	sxi32 nRest,i_32;
	ph7_int64 iSize;
	int c = -1; /* index in zUnit[] */

	if( nArg < 1 ){
		/* Missing argument,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the given size */
	iSize = ph7_value_to_int64(apArg[0]);
	if( iSize < 100 /* Bytes */ ){
		/* Don't bother formatting,return immediately */
		ph7_result_string(pCtx,"0.1 KB",(int)sizeof("0.1 KB")-1);
		return PH7_OK;
	}
	for(;;){
		nRest = (sxi32)(iSize & 0x3FF); 
		iSize >>= 10;
		c++;
		if( (iSize & (~0 ^ 1023)) == 0 ){
			break;
		}
	}
	nRest /= 100;
	if( nRest > 9 ){
		nRest = 9;
	}
	if( iSize > 999 ){
		c++;
		nRest = 9;
		iSize = 0;
	}
	i_32 = (sxi32)iSize;
	/* Format */
	ph7_result_string_format(pCtx,"%d.%d %cB",i_32,nRest,zUnit[c]);
	return PH7_OK;
}
#if !defined(PH7_DISABLE_HASH_FUNC)
/*
 * string md5(string $str[,bool $raw_output = false])
 *   Calculate the md5 hash of a string.
 * Parameter
 *  $str
 *   Input string
 * $raw_output
 *   If the optional raw_output is set to TRUE, then the md5 digest
 *   is instead returned in raw binary format with a length of 16.
 * Return
 *  MD5 Hash as a 32-character hexadecimal string.
 */
static int PH7_builtin_md5(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	unsigned char zDigest[16];
	int raw_output = FALSE;
	const void *pIn;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the input string */
	pIn = (const void *)ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	if( nArg > 1 && ph7_value_is_bool(apArg[1])){
		raw_output = ph7_value_to_bool(apArg[1]);
	}
	/* Compute the MD5 digest */
	SyMD5Compute(pIn,(sxu32)nLen,zDigest);
	if( raw_output ){
		/* Output raw digest */
		ph7_result_string(pCtx,(const char *)zDigest,(int)sizeof(zDigest));
	}else{
		/* Perform a binary to hex conversion */
		SyBinToHexConsumer((const void *)zDigest,sizeof(zDigest),HashConsumer,pCtx);
	}
	return PH7_OK;
}
/*
 * string sha1(string $str[,bool $raw_output = false])
 *   Calculate the sha1 hash of a string.
 * Parameter
 *  $str
 *   Input string
 * $raw_output
 *   If the optional raw_output is set to TRUE, then the md5 digest
 *   is instead returned in raw binary format with a length of 16.
 * Return
 *  SHA1 Hash as a 40-character hexadecimal string.
 */
static int PH7_builtin_sha1(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	unsigned char zDigest[20];
	int raw_output = FALSE;
	const void *pIn;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the input string */
	pIn = (const void *)ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	if( nArg > 1 && ph7_value_is_bool(apArg[1])){
		raw_output = ph7_value_to_bool(apArg[1]);
	}
	/* Compute the SHA1 digest */
	SySha1Compute(pIn,(sxu32)nLen,zDigest);
	if( raw_output ){
		/* Output raw digest */
		ph7_result_string(pCtx,(const char *)zDigest,(int)sizeof(zDigest));
	}else{
		/* Perform a binary to hex conversion */
		SyBinToHexConsumer((const void *)zDigest,sizeof(zDigest),HashConsumer,pCtx);
	}
	return PH7_OK;
}
/*
 * int64 crc32(string $str)
 *   Calculates the crc32 polynomial of a strin.
 * Parameter
 *  $str
 *   Input string
 * Return
 *  CRC32 checksum of the given input (64-bit integer).
 */
static int PH7_builtin_crc32(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const void *pIn;
	sxu32 nCRC;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return 0 */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the input string */
	pIn = (const void *)ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Empty string */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Calculate the sum */
	nCRC = SyCrc32(pIn,(sxu32)nLen);
	/* Return the CRC32 as 64-bit integer */
	ph7_result_int64(pCtx,(ph7_int64)nCRC^ 0xFFFFFFFF);
	return PH7_OK;
}
#endif /* PH7_DISABLE_HASH_FUNC */
/*
 * Parse a CSV string and invoke the supplied callback for each processed xhunk.
 */
PH7_PRIVATE sxi32 PH7_ProcessCsv(
	const char *zInput, /* Raw input */
	int nByte,  /* Input length */
	int delim,  /* Delimiter */
	int encl,   /* Enclosure */
	int escape,  /* Escape character */
	sxi32 (*xConsumer)(const char *,int,void *), /* User callback */
	void *pUserData /* Last argument to xConsumer() */
	)
{
	const char *zEnd = &zInput[nByte];
	const char *zIn = zInput;
	const char *zPtr;
	int isEnc;
	/* Start processing */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		isEnc = 0;
		zPtr = zIn;
		/* Find the first delimiter */
		while( zIn < zEnd ){
			if( zIn[0] == delim && !isEnc){
				/* Delimiter found,break imediately */
				break;
			}else if( zIn[0] == encl ){
				/* Inside enclosure? */
				isEnc = !isEnc;
			}else if( zIn[0] == escape ){
				/* Escape sequence */
				zIn++;
			}
			/* Advance the cursor */
			zIn++;
		}
		if( zIn > zPtr ){
			int nByte = (int)(zIn-zPtr);
			sxi32 rc;
			/* Invoke the supllied callback */
			if( zPtr[0] == encl ){
				zPtr++;
				nByte-=2;
			}
			if( nByte > 0 ){
				rc = xConsumer(zPtr,nByte,pUserData);
				if( rc == SXERR_ABORT ){
					/* User callback request an operation abort */
					break;
				}
			}
		}
		/* Ignore trailing delimiter */
		while( zIn < zEnd && zIn[0] == delim ){
			zIn++;
		}
	}
	return SXRET_OK;
}
/*
 * Default consumer callback for the CSV parsing routine defined above.
 * All the processed input is insereted into an array passed as the last
 * argument to this callback.
 */
PH7_PRIVATE sxi32 PH7_CsvConsumer(const char *zToken,int nTokenLen,void *pUserData)
{
	ph7_value *pArray = (ph7_value *)pUserData;
	ph7_value sEntry;
	SyString sToken;
	/* Insert the token in the given array */
	SyStringInitFromBuf(&sToken,zToken,nTokenLen);
	/* Remove trailing and leading white spcaces and null bytes */
	SyStringFullTrimSafe(&sToken);
	if( sToken.nByte < 1){
		return SXRET_OK;
	}
	PH7_MemObjInitFromString(pArray->pVm,&sEntry,&sToken);
	ph7_array_add_elem(pArray,0,&sEntry);
	PH7_MemObjRelease(&sEntry);
	return SXRET_OK;
}
/*
 * array str_getcsv(string $input[,string $delimiter = ','[,string $enclosure = '"' [,string $escape='\\']]])
 *  Parse a CSV string into an array.
 * Parameters
 *  $input
 *   The string to parse.
 *  $delimiter
 *   Set the field delimiter (one character only).
 *  $enclosure
 *   Set the field enclosure character (one character only).
 *  $escape
 *   Set the escape character (one character only). Defaults as a backslash (\)
 * Return
 *  An indexed array containing the CSV fields or NULL on failure.
 */
static int PH7_builtin_str_getcsv(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zInput,*zPtr;
	ph7_value *pArray;
	int delim  = ',';   /* Delimiter */
	int encl   = '"' ;  /* Enclosure */
	int escape = '\\';  /* Escape character */
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Extract the raw input */
	zInput = ph7_value_to_string(apArg[0],&nLen);
	if( nArg > 1 ){
		int i;
		if( ph7_value_is_string(apArg[1]) ){
			/* Extract the delimiter */
			zPtr = ph7_value_to_string(apArg[1],&i);
			if( i > 0 ){
				delim = zPtr[0];
			}
		}
		if( nArg > 2 ){
			if( ph7_value_is_string(apArg[2]) ){
				/* Extract the enclosure */
				zPtr = ph7_value_to_string(apArg[2],&i);
				if( i > 0 ){
					encl = zPtr[0];
				}
			}
			if( nArg > 3 ){
				if( ph7_value_is_string(apArg[3]) ){
					/* Extract the escape character */
					zPtr = ph7_value_to_string(apArg[3],&i);
					if( i > 0 ){
						escape = zPtr[0];
					}
				}
			}
		}
	}
	/* Create our array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Parse the raw input */
	PH7_ProcessCsv(zInput,nLen,delim,encl,escape,PH7_CsvConsumer,pArray);
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * Extract a tag name from a raw HTML input and insert it in the given
 * container.
 * Refer to [strip_tags()].
 */
static sxi32 AddTag(SySet *pSet,const char *zTag,int nByte)
{
	const char *zEnd = &zTag[nByte];
	const char *zPtr;
	SyString sEntry;
	/* Strip tags */
	for(;;){
		while( zTag < zEnd && (zTag[0] == '<' || zTag[0] == '/' || zTag[0] == '?'
			|| zTag[0] == '!' || zTag[0] == '-' || ((unsigned char)zTag[0] < 0xc0 && SyisSpace(zTag[0]))) ){
				zTag++;
		}
		if( zTag >= zEnd ){
			break;
		}
		zPtr = zTag;
		/* Delimit the tag */
		while(zTag < zEnd ){
			if( (unsigned char)zTag[0] >= 0xc0 ){
				/* UTF-8 stream */
				zTag++;
				SX_JMP_UTF8(zTag,zEnd);
			}else if( !SyisAlphaNum(zTag[0]) ){
				break;
			}else{
				zTag++;
			}
		}
		if( zTag > zPtr ){
			/* Perform the insertion */
			SyStringInitFromBuf(&sEntry,zPtr,(int)(zTag-zPtr));
			SyStringFullTrim(&sEntry);
			SySetPut(pSet,(const void *)&sEntry);
		}
		/* Jump the trailing '>' */
		zTag++;
	}
	return SXRET_OK;
}
/*
 * Check if the given HTML tag name is present in the given container.
 * Return SXRET_OK if present.SXERR_NOTFOUND otherwise.
 * Refer to [strip_tags()].
 */
static sxi32 FindTag(SySet *pSet,const char *zTag,int nByte)
{
	if( SySetUsed(pSet) > 0 ){
		const char *zCur,*zEnd = &zTag[nByte];
		SyString sTag;
		while( zTag < zEnd &&  (zTag[0] == '<' || zTag[0] == '/' || zTag[0] == '?' ||
			((unsigned char)zTag[0] < 0xc0 && SyisSpace(zTag[0]))) ){
			zTag++;
		}
		/* Delimit the tag */
		zCur = zTag;
		while(zTag < zEnd ){
			if( (unsigned char)zTag[0] >= 0xc0 ){
				/* UTF-8 stream */
				zTag++;
				SX_JMP_UTF8(zTag,zEnd);
			}else if( !SyisAlphaNum(zTag[0]) ){
				break;
			}else{
				zTag++;
			}
		}
		SyStringInitFromBuf(&sTag,zCur,zTag-zCur);
		/* Trim leading white spaces and null bytes */
		SyStringLeftTrimSafe(&sTag);
		if( sTag.nByte > 0 ){
			SyString *aEntry,*pEntry;
			sxi32 rc;
			sxu32 n;
			/* Perform the lookup */
			aEntry = (SyString *)SySetBasePtr(pSet);
			for( n = 0 ; n < SySetUsed(pSet) ; ++n ){
				pEntry = &aEntry[n];
				/* Do the comparison */
				rc = SyStringCmp(pEntry,&sTag,SyStrnicmp);
				if( !rc ){
					return SXRET_OK;
				}
			}
		}
	}
	/* No such tag */
	return SXERR_NOTFOUND;
}
/*
 * This function tries to return a string [i.e: in the call context result buffer]
 * with all NUL bytes,HTML and PHP tags stripped from a given string.
 * Refer to [strip_tags()].
 */
PH7_PRIVATE sxi32 PH7_StripTagsFromString(ph7_context *pCtx,const char *zIn,int nByte,const char *zTaglist,int nTaglen)
{
	const char *zEnd = &zIn[nByte];
	const char *zPtr,*zTag;
	SySet sSet;
	/* initialize the set of allowed tags */
	SySetInit(&sSet,&pCtx->pVm->sAllocator,sizeof(SyString));
	if( nTaglen > 0 ){
		/* Set of allowed tags */
		AddTag(&sSet,zTaglist,nTaglen);
	}
	/* Set the empty string */
	ph7_result_string(pCtx,"",0);
	/* Start processing */
	for(;;){
		if(zIn >= zEnd){
			/* No more input to process */
			break;
		}
		zPtr = zIn;
		/* Find a tag */
		while( zIn < zEnd && zIn[0] != '<' && zIn[0] != 0 /* NUL byte */ ){
			zIn++;
		}
		if( zIn > zPtr ){
			/* Consume raw input */
			ph7_result_string(pCtx,zPtr,(int)(zIn-zPtr));
		}
		/* Ignore trailing null bytes */
		while( zIn < zEnd && zIn[0] == 0 ){
			zIn++;
		}
		if(zIn >= zEnd){
			/* No more input to process */
			break;
		}
		if( zIn[0] == '<' ){
			sxi32 rc;
			zTag = zIn++;
			/* Delimit the tag */
			while( zIn < zEnd && zIn[0] != '>' ){
				zIn++;
			}
			if( zIn < zEnd ){
				zIn++; /* Ignore the trailing closing tag */
			}
			/* Query the set */
			rc = FindTag(&sSet,zTag,(int)(zIn-zTag));
			if( rc == SXRET_OK ){
				/* Keep the tag */
				ph7_result_string(pCtx,zTag,(int)(zIn-zTag));
			}
		}
	}
	/* Cleanup */
	SySetRelease(&sSet);
	return SXRET_OK;
}
/*
 * string strip_tags(string $str[,string $allowable_tags])
 *   Strip HTML and PHP tags from a string.
 * Parameters
 *  $str
 *  The input string.
 * $allowable_tags
 *  You can use the optional second parameter to specify tags which should not be stripped. 
 * Return
 *  Returns the stripped string.
 */
static int PH7_builtin_strip_tags(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zTaglist = 0;
	const char *zString;
	int nTaglen = 0;
	int nLen;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Point to the raw string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nArg > 1 && ph7_value_is_string(apArg[1]) ){
		/* Allowed tag */
		zTaglist = ph7_value_to_string(apArg[1],&nTaglen);		
	}
	/* Process input */
	PH7_StripTagsFromString(pCtx,zString,nLen,zTaglist,nTaglen);
	return PH7_OK;
}
/*
 * string str_shuffle(string $str)
 *  Randomly shuffles a string.
 * Parameters
 *  $str
 *   The input string.
 * Return
 *  Returns the shuffled string.
 */
static int PH7_builtin_str_shuffle(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString;
	int nLen,i,c;
	sxu32 iR;
	if( nArg < 1 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to shuffle */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Shuffle the string */
	for( i = 0 ; i < nLen ; ++i ){
		/* Generate a random number first */
		iR = ph7_context_random_num(pCtx);
		/* Extract a random offset */
		c = zString[iR % nLen];
		/* Append it */
		ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
	}
	return PH7_OK;
}
/*
 * array str_split(string $string[,int $split_length = 1 ])
 *  Convert a string to an array.
 * Parameters
 * $str
 *  The input string.
 * $split_length
 *  Maximum length of the chunk.
 * Return
 *  If the optional split_length parameter is specified, the returned array
 *  will be broken down into chunks with each being split_length in length, otherwise
 *  each chunk will be one character in length. FALSE is returned if split_length is less than 1.
 *  If the split_length length exceeds the length of string, the entire string is returned 
 *  as the first (and only) array element.
 */
static int PH7_builtin_str_split(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zEnd;
	ph7_value *pArray,*pValue;
	int split_len;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the target string */
	zString = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	split_len = (int)sizeof(char);
	if( nArg > 1 ){
		/* Split length */
		split_len = ph7_value_to_int(apArg[1]);
		if( split_len < 1 ){
			/* Invalid length,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		if( split_len > nLen ){
			split_len = nLen;
		}
	}
	/* Create the array and the scalar value */
	pArray = ph7_context_new_array(pCtx);
	/*Chunk value */
	pValue = ph7_context_new_scalar(pCtx);
	if( pValue == 0 || pArray == 0 ){
		/* Return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the end of the string */
	zEnd = &zString[nLen];
	/* Perform the requested operation */
	for(;;){
		int nMax;
		if( zString >= zEnd ){
			/* No more input to process */
			break;
		}
		nMax = (int)(zEnd-zString);
		if( nMax < split_len ){
			split_len = nMax;
		}
		/* Copy the current chunk */
		ph7_value_string(pValue,zString,split_len);
		/* Insert it */
		ph7_array_add_elem(pArray,0,pValue); /* Will make it's own copy */
		/* reset the string cursor */
		ph7_value_reset_string_cursor(pValue);
		/* Update position */
		zString += split_len;
	}
	/* 
	 * Return the array.
	 * Don't worry about freeing memory, everything will be automatically released
	 * upon we return from this function.
	 */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * Tokenize a raw string and extract the first non-space token.
 * Refer to [strspn()].
 */
static sxi32 ExtractNonSpaceToken(const char **pzIn,const char *zEnd,SyString *pOut)
{
	const char *zIn = *pzIn;
	const char *zPtr;
	/* Ignore leading white spaces */
	while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
		zIn++;
	}
	if( zIn >= zEnd ){
		/* End of input */
		return SXERR_EOF;
	}
	zPtr = zIn;
	/* Extract the token */
	while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && !SyisSpace(zIn[0]) ){
		zIn++;
	}
	SyStringInitFromBuf(pOut,zPtr,zIn-zPtr);
	/* Synchronize pointers */
	*pzIn = zIn;
	/* Return to the caller */
	return SXRET_OK;
}
/*
 * Check if the given string contains only characters from the given mask.
 * return the longest match.
 * Refer to [strspn()].
 */
static int LongestStringMask(const char *zString,int nLen,const char *zMask,int nMaskLen)
{
	const char *zEnd = &zString[nLen];
	const char *zIn = zString;
	int i,c;
	for(;;){
		if( zString >= zEnd ){
			break;
		}
		/* Extract current character */
		c = zString[0];
		/* Perform the lookup */
		for( i = 0 ; i < nMaskLen ; i++ ){
			if( c == zMask[i] ){
				/* Character found */
				break;
			}
		}
		if( i >= nMaskLen ){
			/* Character not in the current mask,break immediately */
			break;
		}
		/* Advance cursor */
		zString++;
	}
	/* Longest match */
	return (int)(zString-zIn);
}
/*
 * Do the reverse operation of the previous function [i.e: LongestStringMask()].
 * Refer to [strcspn()].
 */
static int LongestStringMask2(const char *zString,int nLen,const char *zMask,int nMaskLen)
{
	const char *zEnd = &zString[nLen];
	const char *zIn = zString;
	int i,c;
	for(;;){
		if( zString >= zEnd ){
			break;
		}
		/* Extract current character */
		c = zString[0];
		/* Perform the lookup */
		for( i = 0 ; i < nMaskLen ; i++ ){
			if( c == zMask[i] ){
				break;
			}
		}
		if( i < nMaskLen ){
			/* Character in the current mask,break immediately */
			break;
		}
		/* Advance cursor */
		zString++;
	}
	/* Longest match */
	return (int)(zString-zIn);
}
/*
 * int strspn(string $str,string $mask[,int $start[,int $length]])
 *  Finds the length of the initial segment of a string consisting entirely
 *  of characters contained within a given mask.
 * Parameters
 * $str
 *  The input string.
 * $mask
 *  The list of allowable characters.
 * $start
 *  The position in subject to start searching.
 *  If start is given and is non-negative, then strspn() will begin examining 
 *  subject at the start'th position. For instance, in the string 'abcdef', the character
 *  at position 0 is 'a', the character at position 2 is 'c', and so forth.
 *  If start is given and is negative, then strspn() will begin examining subject at the
 *  start'th position from the end of subject.
 * $length
 *  The length of the segment from subject to examine.
 *  If length is given and is non-negative, then subject will be examined for length
 *  characters after the starting position.
 *  If lengthis given and is negative, then subject will be examined from the starting
 *  position up to length characters from the end of subject.
 * Return
 * Returns the length of the initial segment of subject which consists entirely of characters
 * in mask.
 */
static int PH7_builtin_strspn(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zMask,*zEnd;
	int iMasklen,iLen;
	SyString sToken;
	int iCount = 0;
	int rc;
	if( nArg < 2 ){
		/* Missing agruments,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&iLen);
	/* Extract the mask */
	zMask = ph7_value_to_string(apArg[1],&iMasklen);
	if( iLen < 1 || iMasklen < 1 ){
		/* Nothing to process,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	if( nArg > 2 ){
		int nOfft;
		/* Extract the offset */
		nOfft = ph7_value_to_int(apArg[2]);
		if( nOfft < 0 ){
			const char *zBase = &zString[iLen + nOfft];
			if( zBase > zString ){
				iLen = (int)(&zString[iLen]-zBase);
				zString = zBase;	
			}else{
				/* Invalid offset */
				ph7_result_int(pCtx,0);
				return PH7_OK;
			}
		}else{
			if( nOfft >= iLen ){
				/* Invalid offset */
				ph7_result_int(pCtx,0);
				return PH7_OK;
			}else{
				/* Update offset */
				zString += nOfft;
				iLen -= nOfft;
			}
		}
		if( nArg > 3 ){
			int iUserlen;
			/* Extract the desired length */
			iUserlen = ph7_value_to_int(apArg[3]);
			if( iUserlen > 0 && iUserlen < iLen ){
				iLen = iUserlen;
			}
		}
	}
	/* Point to the end of the string */
	zEnd = &zString[iLen];
	/* Extract the first non-space token */
	rc = ExtractNonSpaceToken(&zString,zEnd,&sToken);
	if( rc == SXRET_OK && sToken.nByte > 0 ){
		/* Compare against the current mask */
		iCount = LongestStringMask(sToken.zString,(int)sToken.nByte,zMask,iMasklen);
	}
	/* Longest match */
	ph7_result_int(pCtx,iCount);
	return PH7_OK;
}
/*
 * int strcspn(string $str,string $mask[,int $start[,int $length]])
 *  Find length of initial segment not matching mask.
 * Parameters
 * $str
 *  The input string.
 * $mask
 *  The list of not allowed characters.
 * $start
 *  The position in subject to start searching.
 *  If start is given and is non-negative, then strspn() will begin examining 
 *  subject at the start'th position. For instance, in the string 'abcdef', the character
 *  at position 0 is 'a', the character at position 2 is 'c', and so forth.
 *  If start is given and is negative, then strspn() will begin examining subject at the
 *  start'th position from the end of subject.
 * $length
 *  The length of the segment from subject to examine.
 *  If length is given and is non-negative, then subject will be examined for length
 *  characters after the starting position.
 *  If lengthis given and is negative, then subject will be examined from the starting
 *  position up to length characters from the end of subject.
 * Return
 *  Returns the length of the segment as an integer.
 */
static int PH7_builtin_strcspn(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zMask,*zEnd;
	int iMasklen,iLen;
	SyString sToken;
	int iCount = 0;
	int rc;
	if( nArg < 2 ){
		/* Missing agruments,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zString = ph7_value_to_string(apArg[0],&iLen);
	/* Extract the mask */
	zMask = ph7_value_to_string(apArg[1],&iMasklen);
	if( iLen < 1 ){
		/* Nothing to process,return zero */
		ph7_result_int(pCtx,0);
		return PH7_OK;
	}
	if( iMasklen < 1 ){
		/* No given mask,return the string length */
		ph7_result_int(pCtx,iLen);
		return PH7_OK;
	}
	if( nArg > 2 ){
		int nOfft;
		/* Extract the offset */
		nOfft = ph7_value_to_int(apArg[2]);
		if( nOfft < 0 ){
			const char *zBase = &zString[iLen + nOfft];
			if( zBase > zString ){
				iLen = (int)(&zString[iLen]-zBase);
				zString = zBase;	
			}else{
				/* Invalid offset */
				ph7_result_int(pCtx,0);
				return PH7_OK;
			}
		}else{
			if( nOfft >= iLen ){
				/* Invalid offset */
				ph7_result_int(pCtx,0);
				return PH7_OK;
			}else{
				/* Update offset */
				zString += nOfft;
				iLen -= nOfft;
			}
		}
		if( nArg > 3 ){
			int iUserlen;
			/* Extract the desired length */
			iUserlen = ph7_value_to_int(apArg[3]);
			if( iUserlen > 0 && iUserlen < iLen ){
				iLen = iUserlen;
			}
		}
	}
	/* Point to the end of the string */
	zEnd = &zString[iLen];
	/* Extract the first non-space token */
	rc = ExtractNonSpaceToken(&zString,zEnd,&sToken);
	if( rc == SXRET_OK && sToken.nByte > 0 ){
		/* Compare against the current mask */
		iCount = LongestStringMask2(sToken.zString,(int)sToken.nByte,zMask,iMasklen);
	}
	/* Longest match */
	ph7_result_int(pCtx,iCount);
	return PH7_OK;
}
/*
 * string strpbrk(string $haystack,string $char_list)
 *  Search a string for any of a set of characters.
 * Parameters
 *  $haystack
 *   The string where char_list is looked for.
 *  $char_list
 *   This parameter is case sensitive.
 * Return
 *  Returns a string starting from the character found, or FALSE if it is not found.
 */
static int PH7_builtin_strpbrk(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zString,*zList,*zEnd;
	int iLen,iListLen,i,c;
	sxu32 nOfft,nMax;
	sxi32 rc;
	if( nArg < 2 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the haystack and the char list */
	zString = ph7_value_to_string(apArg[0],&iLen);
	zList = ph7_value_to_string(apArg[1],&iListLen);
	if( iLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Point to the end of the string */
	zEnd = &zString[iLen];
	nOfft = nMax = SXU32_HIGH;
	/* perform the requested operation */
	for( i = 0 ; i < iListLen ; i++ ){
		c = zList[i];
		rc = SyByteFind(zString,(sxu32)iLen,c,&nMax);
		if( rc == SXRET_OK ){
			if( nMax < nOfft ){
				nOfft = nMax;
			}
		}
	}
	if( nOfft == SXU32_HIGH ){
		/* No such substring,return FALSE */
		ph7_result_bool(pCtx,0);
	}else{
		/* Return the substring */
		ph7_result_string(pCtx,&zString[nOfft],(int)(zEnd-&zString[nOfft]));
	}
	return PH7_OK;
}
/*
 * string soundex(string $str)
 *  Calculate the soundex key of a string.
 * Parameters
 *  $str
 *   The input string.
 * Return
 *  Returns the soundex key as a string.
 * Note:
 *  This implementation is based on the one found in the SQLite3
 * source tree.
 */
static int PH7_builtin_soundex(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn;
	char zResult[8];
	int i, j;
	static const unsigned char iCode[] = {
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 1, 2, 3, 0, 1, 2, 0, 0, 2, 2, 4, 5, 5, 0,
		1, 2, 6, 2, 3, 0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0,
		0, 0, 1, 2, 3, 0, 1, 2, 0, 0, 2, 2, 4, 5, 5, 0,
		1, 2, 6, 2, 3, 0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0,
	};
	if( nArg < 1 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	zIn = (unsigned char *)ph7_value_to_string(apArg[0],0);
	for(i=0; zIn[i] && zIn[i] < 0xc0 && !SyisAlpha(zIn[i]); i++){}
	if( zIn[i] ){
		unsigned char prevcode = iCode[zIn[i]&0x7f];
		zResult[0] = (char)SyToUpper(zIn[i]);
		for(j=1; j<4 && zIn[i]; i++){
			int code = iCode[zIn[i]&0x7f];
			if( code>0 ){
				if( code!=prevcode ){
					prevcode = (unsigned char)code;
					zResult[j++] = (char)code + '0';
				}
			}else{
				prevcode = 0;
			}
		}
		while( j<4 ){
			zResult[j++] = '0';
		}
		ph7_result_string(pCtx,zResult,4);
	}else{
	  ph7_result_string(pCtx,"?000",4);
	}
	return PH7_OK;
}
/*
 * string wordwrap(string $str[,int $width = 75[,string $break = "\n"]])
 *  Wraps a string to a given number of characters.
 * Parameters
 *  $str
 *   The input string.
 * $width
 *  The column width.
 * $break
 *  The line is broken using the optional break parameter.
 * Return
 *  Returns the given string wrapped at the specified column. 
 */
static int PH7_builtin_wordwrap(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn,*zEnd,*zBreak;
	int iLen,iBreaklen,iChunk;
	if( nArg < 1 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the input string */
	zIn = ph7_value_to_string(apArg[0],&iLen);
	if( iLen < 1 ){
		/* Nothing to process,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Chunk length */
	iChunk = 75;
	iBreaklen = 0;
	zBreak = ""; /* cc warning */
	if( nArg > 1 ){
		iChunk = ph7_value_to_int(apArg[1]);
		if( iChunk < 1 ){
			iChunk = 75;
		}
		if( nArg > 2 ){
			zBreak = ph7_value_to_string(apArg[2],&iBreaklen);
		}
	}
	if( iBreaklen < 1 ){
		/* Set a default column break */
#ifdef __WINNT__
		zBreak = "\r\n";
		iBreaklen = (int)sizeof("\r\n")-1;
#else
		zBreak = "\n";
		iBreaklen = (int)sizeof(char);
#endif
	}
	/* Perform the requested operation */
	zEnd = &zIn[iLen];
	for(;;){
		int nMax;
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		nMax = (int)(zEnd-zIn);
		if( iChunk > nMax ){
			iChunk = nMax;
		}
		/* Append the column first */
		ph7_result_string(pCtx,zIn,iChunk); /* Will make it's own copy */
		/* Advance the cursor */
		zIn += iChunk;
		if( zIn < zEnd ){
			/* Append the line break */
			ph7_result_string(pCtx,zBreak,iBreaklen);
		}
	}
	return PH7_OK;
}
/*
 * Check if the given character is a member of the given mask.
 * Return TRUE on success. FALSE otherwise.
 * Refer to [strtok()].
 */
static int CheckMask(int c,const char *zMask,int nMasklen,int *pOfft)
{
	int i;
	for( i = 0 ; i < nMasklen ; ++i ){
		if( c == zMask[i] ){
			if( pOfft ){
				*pOfft = i;
			}
			return TRUE;
		}
	}
	return FALSE;
}
/*
 * Extract a single token from the input stream.
 * Refer to [strtok()].
 */
static sxi32 ExtractToken(const char **pzIn,const char *zEnd,const char *zMask,int nMasklen,SyString *pOut)
{
	const char *zIn = *pzIn;
	const char *zPtr;
	/* Ignore leading delimiter */
	while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && CheckMask(zIn[0],zMask,nMasklen,0) ){
		zIn++;
	}
	if( zIn >= zEnd ){
		/* End of input */
		return SXERR_EOF;
	}
	zPtr = zIn;
	/* Extract the token */
	while( zIn < zEnd ){
		if( (unsigned char)zIn[0] >= 0xc0 ){
			/* UTF-8 stream */
			zIn++;
			SX_JMP_UTF8(zIn,zEnd);
		}else{
			if( CheckMask(zIn[0],zMask,nMasklen,0) ){
				break;
			}
			zIn++;
		}
	}
	SyStringInitFromBuf(pOut,zPtr,zIn-zPtr);
	/* Update the cursor */
	*pzIn = zIn;
	/* Return to the caller */
	return SXRET_OK;
}
/* strtok auxiliary private data */
typedef struct strtok_aux_data strtok_aux_data;
struct strtok_aux_data
{
	const char *zDup;  /* Complete duplicate of the input */
	const char *zIn;   /* Current input stream */
	const char *zEnd;  /* End of input */
};
/*
 * string strtok(string $str,string $token)
 * string strtok(string $token)
 *  strtok() splits a string (str) into smaller strings (tokens), with each token
 *  being delimited by any character from token. That is, if you have a string like
 *  "This is an example string" you could tokenize this string into its individual
 *  words by using the space character as the token.
 *  Note that only the first call to strtok uses the string argument. Every subsequent
 *  call to strtok only needs the token to use, as it keeps track of where it is in 
 *  the current string. To start over, or to tokenize a new string you simply call strtok
 *  with the string argument again to initialize it. Note that you may put multiple tokens
 *  in the token parameter. The string will be tokenized when any one of the characters in 
 *  the argument are found. 
 * Parameters
 *  $str
 *  The string being split up into smaller strings (tokens).
 * $token
 *  The delimiter used when splitting up str.
 * Return
 *   Current token or FALSE on EOF.
 */
static int PH7_builtin_strtok(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	strtok_aux_data *pAux;
	const char *zMask;
	SyString sToken; 
	int nMasklen;
	sxi32 rc;
	if( nArg < 2 ){
		/* Extract top aux data */
		pAux = (strtok_aux_data *)ph7_context_peek_aux_data(pCtx);
		if( pAux == 0 ){
			/* No aux data,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		nMasklen = 0;
		zMask = ""; /* cc warning */
		if( nArg > 0 ){
			/* Extract the mask */
			zMask = ph7_value_to_string(apArg[0],&nMasklen);
		}
		if( nMasklen < 1 ){
			/* Invalid mask,return FALSE */
			ph7_context_free_chunk(pCtx,(void *)pAux->zDup);
			ph7_context_free_chunk(pCtx,pAux);
			(void)ph7_context_pop_aux_data(pCtx);
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Extract the token */
		rc = ExtractToken(&pAux->zIn,pAux->zEnd,zMask,nMasklen,&sToken);
		if( rc != SXRET_OK ){
			/* EOF ,discard the aux data */
			ph7_context_free_chunk(pCtx,(void *)pAux->zDup);
			ph7_context_free_chunk(pCtx,pAux);
			(void)ph7_context_pop_aux_data(pCtx);
			ph7_result_bool(pCtx,0);
		}else{
			/* Return the extracted token */
			ph7_result_string(pCtx,sToken.zString,(int)sToken.nByte);
		}
	}else{
		const char *zInput,*zCur;
		char *zDup;
		int nLen;
		/* Extract the raw input */
		zCur = zInput = ph7_value_to_string(apArg[0],&nLen);
		if( nLen < 1 ){
			/* Empty input,return FALSE */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}
		/* Extract the mask */
		zMask = ph7_value_to_string(apArg[1],&nMasklen);
		if( nMasklen < 1 ){
			/* Set a default mask */
#define TOK_MASK " \n\t\r\f" 
			zMask = TOK_MASK;
			nMasklen = (int)sizeof(TOK_MASK) - 1;
#undef TOK_MASK
		}
		/* Extract a single token */
		rc = ExtractToken(&zInput,&zInput[nLen],zMask,nMasklen,&sToken);
		if( rc != SXRET_OK ){
			/* Empty input */
			ph7_result_bool(pCtx,0);
			return PH7_OK;
		}else{
			/* Return the extracted token */
			ph7_result_string(pCtx,sToken.zString,(int)sToken.nByte);
		}
		/* Create our auxilliary data and copy the input */
		pAux = (strtok_aux_data *)ph7_context_alloc_chunk(pCtx,sizeof(strtok_aux_data),TRUE,FALSE);
		if( pAux ){
			nLen -= (int)(zInput-zCur);
			if( nLen < 1 ){
				ph7_context_free_chunk(pCtx,pAux);
				return PH7_OK;
			}
			/* Duplicate input */
			zDup = (char *)ph7_context_alloc_chunk(pCtx,(unsigned int)(nLen+1),TRUE,FALSE);
			if( zDup  ){
				SyMemcpy(zInput,zDup,(sxu32)nLen);
				/* Register the aux data */
				pAux->zDup = pAux->zIn = zDup;
				pAux->zEnd = &zDup[nLen];
				ph7_context_push_aux_data(pCtx,pAux);
			}
		}
	}
	return PH7_OK;
}
/*
 * string str_pad(string $input,int $pad_length[,string $pad_string = " " [,int $pad_type = STR_PAD_RIGHT]])
 *  Pad a string to a certain length with another string
 * Parameters
 *  $input
 *   The input string.
 * $pad_length
 *   If the value of pad_length is negative, less than, or equal to the length of the input 
 *   string, no padding takes place.
 * $pad_string
 *   Note:
 *    The pad_string WIIL NOT BE truncated if the required number of padding characters can't be evenly
 *    divided by the pad_string's length.
 * $pad_type
 *    Optional argument pad_type can be STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH. If pad_type
 *    is not specified it is assumed to be STR_PAD_RIGHT.
 * Return
 *  The padded string.
 */
static int PH7_builtin_str_pad(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int iLen,iPadlen,iType,i,iDiv,iStrpad,iRealPad,jPad;
	const char *zIn,*zPad;
	if( nArg < 2 ){
		/* Missing arguments,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn = ph7_value_to_string(apArg[0],&iLen);
	/* Padding length */
	iRealPad = iPadlen = ph7_value_to_int(apArg[1]);
	if( iPadlen > 0 ){
		iPadlen -= iLen;
	}
	if( iPadlen < 1  ){
		/* Return the string verbatim */
		ph7_result_string(pCtx,zIn,iLen);
		return PH7_OK;
	}
	zPad = " "; /* Whitespace padding */
	iStrpad = (int)sizeof(char);
	iType = 1 ; /* STR_PAD_RIGHT */
	if( nArg > 2 ){
		/* Padding string */
		zPad = ph7_value_to_string(apArg[2],&iStrpad);
		if( iStrpad < 1 ){
			/* Empty string */
			zPad = " "; /* Whitespace padding */
			iStrpad = (int)sizeof(char);
		}
		if( nArg > 3 ){
			/* Padd type */
			iType = ph7_value_to_int(apArg[3]);
			if( iType != 0 /* STR_PAD_LEFT */ && iType != 2 /* STR_PAD_BOTH */ ){
				iType = 1 ; /* STR_PAD_RIGHT */
			}
		}
	}
	iDiv = 1;
	if( iType == 2 ){
		iDiv = 2; /* STR_PAD_BOTH */
	}
	/* Perform the requested operation */
	if( iType == 0 /* STR_PAD_LEFT */ || iType == 2 /* STR_PAD_BOTH */ ){
		jPad = iStrpad;
		for( i = 0 ; i < iPadlen/iDiv ; i += jPad ){
			/* Padding */
			if( (int)ph7_context_result_buf_length(pCtx) + iLen + jPad >= iRealPad ){
				break;
			}
			ph7_result_string(pCtx,zPad,jPad);
		}
		if( iType == 0 /* STR_PAD_LEFT */ ){
			while( (int)ph7_context_result_buf_length(pCtx) + iLen < iRealPad ){
				jPad = iRealPad - (iLen + (int)ph7_context_result_buf_length(pCtx) );
				if( jPad > iStrpad ){
					jPad = iStrpad;
				}
				if( jPad < 1){
					break;
				}
				ph7_result_string(pCtx,zPad,jPad);
			}
		}
	}
	if( iLen > 0 ){
		/* Append the input string */
		ph7_result_string(pCtx,zIn,iLen);
	}
	if( iType == 1 /* STR_PAD_RIGHT */ || iType == 2 /* STR_PAD_BOTH */ ){
		for( i = 0 ; i < iPadlen/iDiv ; i += iStrpad ){
			/* Padding */
			if( (int)ph7_context_result_buf_length(pCtx) + iStrpad >= iRealPad ){
				break;
			}
			ph7_result_string(pCtx,zPad,iStrpad);
		}
		while( (int)ph7_context_result_buf_length(pCtx) < iRealPad ){
			jPad = iRealPad - (int)ph7_context_result_buf_length(pCtx);
			if( jPad > iStrpad ){
				jPad = iStrpad;
			}
			if( jPad < 1){
				break;
			}
			ph7_result_string(pCtx,zPad,jPad);
		}
	}
	return PH7_OK;
}
/*
 * String replacement private data.
 */
typedef struct str_replace_data str_replace_data;
struct str_replace_data
{
	/* The following two fields are only used by the strtr function */
	SyBlob *pWorker;         /* Working buffer */
	ProcStringMatch xMatch;  /* Pattern match routine */
	/* The following two fields are only used by the str_replace function */
	SySet *pCollector;  /* Argument collector*/
	ph7_context *pCtx;  /* Call context */
};
/*
 * Remove a substring.
 */
#define STRDEL(SRC,SLEN,OFFT,ILEN){\
	for(;;){\
		if( OFFT + ILEN >= SLEN ) break; SRC[OFFT] = SRC[OFFT+ILEN]; ++OFFT;\
	}\
}
/*
 * Shift right and insert algorithm.
 */
#define SHIFTRANDINSERT(SRC,LEN,OFFT,ENTRY,ELEN){\
	sxu32 INLEN = LEN - OFFT;\
	for(;;){\
	  if( LEN > 0 ){ LEN--; } if(INLEN < 1 ) break; SRC[LEN + ELEN] = SRC[LEN] ; --INLEN; \
	}\
	for(;;){\
		if(ELEN < 1)break; SRC[OFFT] = ENTRY[0]; OFFT++; ENTRY++; --ELEN;\
	}\
} 
/*
 * Replace all occurrences of the search string at offset (nOfft) with the given 
 * replacement string [i.e: zReplace].
 */
static int StringReplace(SyBlob *pWorker,sxu32 nOfft,int nLen,const char *zReplace,int nReplen)
{
	char *zInput = (char *)SyBlobData(pWorker);
	sxu32 n,m;
	n = SyBlobLength(pWorker);
	m = nOfft;
	/* Delete the old entry */
	STRDEL(zInput,n,m,nLen);
	SyBlobLength(pWorker) -= nLen;
	if( nReplen > 0 ){
		sxi32 iRep = nReplen;
		sxi32 rc;
		/*
		 * Make sure the working buffer is big enough to hold the replacement
		 * string.
		 */
		rc = SyBlobAppend(pWorker,0/* Grow without an append operation*/,(sxu32)nReplen);
		if( rc != SXRET_OK ){
			/* Simply ignore any memory failure problem */
			return SXRET_OK;
		}
		/* Perform the insertion now */
		zInput = (char *)SyBlobData(pWorker);
		n = SyBlobLength(pWorker);
		SHIFTRANDINSERT(zInput,n,nOfft,zReplace,iRep);
		SyBlobLength(pWorker) += nReplen;
	}	
	return SXRET_OK;
}
/*
 * String replacement walker callback.
 * The following callback is invoked for each array entry that hold
 * the replace string.
 * Refer to the strtr() implementation for more information.
 */
static int StringReplaceWalker(ph7_value *pKey,ph7_value *pData,void *pUserData)
{
	str_replace_data *pRepData = (str_replace_data *)pUserData;
	const char *zTarget,*zReplace;
	SyBlob *pWorker;
	int tLen,nLen;
	sxu32 nOfft;
	sxi32 rc;
	/* Point to the working buffer */
	pWorker = pRepData->pWorker;
	if( !ph7_value_is_string(pKey) ){
		/* Target and replace must be a string */
		return PH7_OK;
	}
	/* Extract the target and the replace */
	zTarget = ph7_value_to_string(pKey,&tLen);
	if( tLen < 1 ){
		/* Empty target,return immediately */
		return PH7_OK;
	}
	/* Perform a pattern search */
	rc = pRepData->xMatch(SyBlobData(pWorker),SyBlobLength(pWorker),(const void *)zTarget,(sxu32)tLen,&nOfft);
	if( rc != SXRET_OK ){
		/* Pattern not found */
		return PH7_OK;
	}
	/* Extract the replace string */
	zReplace = ph7_value_to_string(pData,&nLen);
	/* Perform the replace process */
	StringReplace(pWorker,nOfft,tLen,zReplace,nLen);
	/* All done */
	return PH7_OK;
}
/*
 * The following walker callback is invoked by the str_rplace() function inorder
 * to collect search/replace string.
 * This callback is invoked only if the given argument is of type array.
 */
static int StrReplaceWalker(ph7_value *pKey,ph7_value *pData,void *pUserData)
{
	str_replace_data *pRep = (str_replace_data *)pUserData;
	SyString sWorker;
	const char *zIn;
	int nByte;
	/* Extract a string representation of the given argument */
	zIn = ph7_value_to_string(pData,&nByte);
	SyStringInitFromBuf(&sWorker,0,0);
	if( nByte > 0 ){
		char *zDup;
		/* Duplicate the chunk */
		zDup = (char *)ph7_context_alloc_chunk(pRep->pCtx,(unsigned int)nByte,FALSE,
			TRUE /* Release the chunk automatically,upon this context is destroyd */
			);
		if( zDup == 0 ){
			/* Ignore any memory failure problem */
			ph7_context_throw_error(pRep->pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
			return PH7_OK;
		}
		SyMemcpy(zIn,zDup,(sxu32)nByte);
		/* Save the chunk */
		SyStringInitFromBuf(&sWorker,zDup,nByte);
	}
	/* Save for later processing */
	SySetPut(pRep->pCollector,(const void *)&sWorker);
	/* All done */
	SXUNUSED(pKey); /* cc warning */
	return PH7_OK;
}
/*
 * mixed str_replace(mixed $search,mixed $replace,mixed $subject[,int &$count ])
 * mixed str_ireplace(mixed $search,mixed $replace,mixed $subject[,int &$count ])
 *  Replace all occurrences of the search string with the replacement string.
 * Parameters
 *  If search and replace are arrays, then str_replace() takes a value from each
 *  array and uses them to search and replace on subject. If replace has fewer values
 *  than search, then an empty string is used for the rest of replacement values.
 *  If search is an array and replace is a string, then this replacement string is used
 *  for every value of search. The converse would not make sense, though.
 *  If search or replace are arrays, their elements are processed first to last.
 * $search
 *  The value being searched for, otherwise known as the needle. An array may be used
 *  to designate multiple needles.
 * $replace
 *  The replacement value that replaces found search values. An array may be used
 *  to designate multiple replacements.
 * $subject
 *  The string or array being searched and replaced on, otherwise known as the haystack.
 *  If subject is an array, then the search and replace is performed with every entry 
 *  of subject, and the return value is an array as well.
 * $count (Not used)
 *  If passed, this will be set to the number of replacements performed.
 * Return
 * This function returns a string or an array with the replaced values.
 */
static int PH7_builtin_str_replace(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	SyString sTemp,*pSearch,*pReplace;
	ProcStringMatch xMatch;
	const char *zIn,*zFunc;
	str_replace_data sRep;
	SyBlob sWorker;
	SySet sReplace;
	SySet sSearch;
	int rep_str;
	int nByte;
	sxi32 rc;
	if( nArg < 3 ){
		/* Missing/Invalid arguments,return null */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Initialize fields */
	SySetInit(&sSearch,&pCtx->pVm->sAllocator,sizeof(SyString));
	SySetInit(&sReplace,&pCtx->pVm->sAllocator,sizeof(SyString));
	SyBlobInit(&sWorker,&pCtx->pVm->sAllocator);
	SyZero(&sRep,sizeof(str_replace_data));
	sRep.pCtx = pCtx;
	sRep.pCollector = &sSearch;
	rep_str = 0;
	/* Extract the subject */
	zIn = ph7_value_to_string(apArg[2],&nByte);
	if( nByte < 1 ){
		/* Nothing to replace,return the empty string */
		ph7_result_string(pCtx,"",0);
		return PH7_OK;
	}
	/* Copy the subject */
	SyBlobAppend(&sWorker,(const void *)zIn,(sxu32)nByte);
	/* Search string */
	if( ph7_value_is_array(apArg[0]) ){
		/* Collect search string */
		ph7_array_walk(apArg[0],StrReplaceWalker,&sRep);
	}else{
		/* Single pattern */
		zIn = ph7_value_to_string(apArg[0],&nByte);
		if( nByte < 1 ){
			/* Return the subject untouched since no search string is available */
			ph7_result_value(pCtx,apArg[2]/* Subject as thrird argument*/);
			return PH7_OK;
		}
		SyStringInitFromBuf(&sTemp,zIn,nByte);
		/* Save for later processing */
		SySetPut(&sSearch,(const void *)&sTemp);
	}
	/* Replace string */
	if( ph7_value_is_array(apArg[1]) ){
		/* Collect replace string */
		sRep.pCollector = &sReplace;
		ph7_array_walk(apArg[1],StrReplaceWalker,&sRep);
	}else{
		/* Single needle */
		zIn = ph7_value_to_string(apArg[1],&nByte);
		rep_str = 1;
		SyStringInitFromBuf(&sTemp,zIn,nByte);
		/* Save for later processing */
		SySetPut(&sReplace,(const void *)&sTemp);
	}
	/* Reset loop cursors */
	SySetResetCursor(&sSearch);
	SySetResetCursor(&sReplace);
	pReplace = pSearch = 0; /* cc warning */
	SyStringInitFromBuf(&sTemp,"",0);
	/* Extract function name */
	zFunc = ph7_function_name(pCtx);
	/* Set the default pattern match routine */
	xMatch = SyBlobSearch;
	if( SyStrncmp(zFunc,"str_ireplace",sizeof("str_ireplace") - 1) ==  0 ){
		/* Case insensitive pattern match */
		xMatch = iPatternMatch;
	}
	/* Start the replace process */
	while( SXRET_OK == SySetGetNextEntry(&sSearch,(void **)&pSearch) ){
		sxu32 nCount,nOfft;
		if( pSearch->nByte <  1 ){
			/* Empty string,ignore */
			continue;
		}
		/* Extract the replace string */
		if( rep_str ){
			pReplace = (SyString *)SySetPeek(&sReplace);
		}else{
			if( SXRET_OK != SySetGetNextEntry(&sReplace,(void **)&pReplace) ){
				/* Sepecial case when 'replace set' has fewer values than the search set.
				 * An empty string is used for the rest of replacement values
				 */
				pReplace = 0;
			}
		}
		if( pReplace == 0 ){
			/* Use an empty string instead */
			pReplace = &sTemp;
		}
		nOfft = nCount = 0;
		for(;;){
			if( nCount >= SyBlobLength(&sWorker) ){
				break;
			}
			/* Perform a pattern lookup */
			rc = xMatch(SyBlobDataAt(&sWorker,nCount),SyBlobLength(&sWorker) - nCount,(const void *)pSearch->zString,
				pSearch->nByte,&nOfft);
			if( rc != SXRET_OK ){
				/* Pattern not found */
				break;
			}
			/* Perform the replace operation */
			StringReplace(&sWorker,nCount+nOfft,(int)pSearch->nByte,pReplace->zString,(int)pReplace->nByte);
			/* Increment offset counter */
			nCount += nOfft + pReplace->nByte;
		}
	}
	/* All done,clean-up the mess left behind */
	ph7_result_string(pCtx,(const char *)SyBlobData(&sWorker),(int)SyBlobLength(&sWorker));
	SySetRelease(&sSearch);
	SySetRelease(&sReplace);
	SyBlobRelease(&sWorker);
	return PH7_OK;
}
/*
 * string strtr(string $str,string $from,string $to)
 * string strtr(string $str,array $replace_pairs)
 *  Translate characters or replace substrings.
 * Parameters
 *  $str
 *  The string being translated.
 * $from
 *  The string being translated to to.
 * $to
 *  The string replacing from.
 * $replace_pairs
 *  The replace_pairs parameter may be used instead of to and 
 *  from, in which case it's an array in the form array('from' => 'to', ...).
 * Return
 *  The translated string.
 *  If replace_pairs contains a key which is an empty string (""), FALSE will be returned.
 */
static int PH7_builtin_strtr(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn;
	int nLen;
	if( nArg < 1 ){
		/* Nothing to replace,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 || nArg < 2 ){
		/* Invalid arguments */
		ph7_result_string(pCtx,zIn,nLen);
		return PH7_OK;
	}
	if( nArg == 2 && ph7_value_is_array(apArg[1]) ){
		str_replace_data sRepData;
		SyBlob sWorker;
		/* Initilaize the working buffer */
		SyBlobInit(&sWorker,&pCtx->pVm->sAllocator);
		/* Copy raw string */
		SyBlobAppend(&sWorker,(const void *)zIn,(sxu32)nLen);
		/* Init our replace data instance */
		sRepData.pWorker = &sWorker;
		sRepData.xMatch = SyBlobSearch;
		/* Iterate throw array entries and perform the replace operation.*/
		ph7_array_walk(apArg[1],StringReplaceWalker,&sRepData);
		/* All done, return the result string */
		ph7_result_string(pCtx,(const char *)SyBlobData(&sWorker),
			(int)SyBlobLength(&sWorker)); /* Will make it's own copy */
		/* Clean-up */
		SyBlobRelease(&sWorker);
	}else{
		int i,flen,tlen,c,iOfft;
		const char *zFrom,*zTo;
		if( nArg < 3 ){
			/* Nothing to replace */
			ph7_result_string(pCtx,zIn,nLen);
			return PH7_OK;
		}
		/* Extract given arguments */
		zFrom = ph7_value_to_string(apArg[1],&flen);
		zTo = ph7_value_to_string(apArg[2],&tlen);
		if( flen < 1 || tlen < 1 ){
			/* Nothing to replace */
			ph7_result_string(pCtx,zIn,nLen);
			return PH7_OK;
		}
		/* Start the replace process */
		for( i = 0 ; i < nLen ; ++i ){
			c = zIn[i];
			if( CheckMask(c,zFrom,flen,&iOfft) ){
				if ( iOfft < tlen ){
					c = zTo[iOfft];
				}
			}
			ph7_result_string(pCtx,(const char *)&c,(int)sizeof(char));
			
		}
	}
	return PH7_OK;
}
/*
 * Parse an INI string.
 * According to wikipedia
 *  The INI file format is an informal standard for configuration files for some platforms or software.
 *  INI files are simple text files with a basic structure composed of "sections" and "properties".
 *  Format
*    Properties
*     The basic element contained in an INI file is the property. Every property has a name and a value
*     delimited by an equals sign (=). The name appears to the left of the equals sign.
*     Example:
*      name=value
*    Sections
*     Properties may be grouped into arbitrarily named sections. The section name appears on a line by itself
*     in square brackets ([ and ]). All properties after the section declaration are associated with that section.
*     There is no explicit "end of section" delimiter; sections end at the next section declaration
*     or the end of the file. Sections may not be nested.
*     Example:
*      [section]
*   Comments
*    Semicolons (;) at the beginning of the line indicate a comment. Comment lines are ignored.
* This function return an array holding parsed values on success.FALSE otherwise.
*/
PH7_PRIVATE sxi32 PH7_ParseIniString(ph7_context *pCtx,const char *zIn,sxu32 nByte,int bProcessSection)
{
	ph7_value *pCur,*pArray,*pSection,*pWorker,*pValue;
	const char *zCur,*zEnd = &zIn[nByte];
	SyHashEntry *pEntry;
	SyString sEntry;
	SyHash sHash;
	int c;
	/* Create an empty array and worker variables */
	pArray = ph7_context_new_array(pCtx);
	pWorker = ph7_context_new_scalar(pCtx);
	pValue = ph7_context_new_scalar(pCtx);
	if( pArray == 0 || pWorker == 0 || pValue == 0){
		/* Out of memory */
		ph7_context_throw_error(pCtx,PH7_CTX_ERR,"PH7 is running out of memory");
		/* Return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	SyHashInit(&sHash,&pCtx->pVm->sAllocator,0,0);
	pCur = pArray;
	/* Start the parse process */
	for(;;){
		/* Ignore leading white spaces */
		while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0])){
			zIn++;
		}
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		if( zIn[0] == ';' || zIn[0] == '#' ){
			/* Comment til the end of line */
			zIn++;
			while(zIn < zEnd && zIn[0] != '\n' ){
				zIn++;
			}
			continue;
		}
		/* Reset the string cursor of the working variable */
		ph7_value_reset_string_cursor(pWorker);
		if( zIn[0] == '[' ){
			/* Section: Extract the section name */
			zIn++;
			zCur = zIn;
			while( zIn < zEnd && zIn[0] != ']' ){
				zIn++;
			}
			if( zIn > zCur && bProcessSection ){
				/* Save the section name */
				SyStringInitFromBuf(&sEntry,zCur,(int)(zIn-zCur));
				SyStringFullTrim(&sEntry);
				ph7_value_string(pWorker,sEntry.zString,(int)sEntry.nByte);
				if( sEntry.nByte > 0 ){
					/* Associate an array with the section */
					pSection = ph7_context_new_array(pCtx);
					if( pSection ){
						ph7_array_add_elem(pArray,pWorker/*Section name*/,pSection);
						pCur = pSection;
					}
				}
			}
			zIn++; /* Trailing square brackets ']' */
		}else{
			ph7_value *pOldCur;
			int is_array;
			int iLen;
			/* Properties */
			is_array = 0;
			zCur = zIn;
			iLen = 0; /* cc warning */
			pOldCur = pCur;
			while( zIn < zEnd && zIn[0] != '=' ){
				if( zIn[0] == '[' && !is_array ){
					/* Array */
					iLen = (int)(zIn-zCur);
					is_array = 1;
					if( iLen > 0 ){
						ph7_value *pvArr = 0; /* cc warning */
						/* Query the hashtable */
						SyStringInitFromBuf(&sEntry,zCur,iLen);
						SyStringFullTrim(&sEntry);
						pEntry = SyHashGet(&sHash,(const void *)sEntry.zString,sEntry.nByte);
						if( pEntry ){
							pvArr = (ph7_value *)SyHashEntryGetUserData(pEntry);
						}else{
							/* Create an empty array */
							pvArr = ph7_context_new_array(pCtx);
							if( pvArr ){
								/* Save the entry */
								SyHashInsert(&sHash,(const void *)sEntry.zString,sEntry.nByte,pvArr);
								/* Insert the entry */
								ph7_value_reset_string_cursor(pWorker);
								ph7_value_string(pWorker,sEntry.zString,(int)sEntry.nByte);
								ph7_array_add_elem(pCur,pWorker,pvArr);
								ph7_value_reset_string_cursor(pWorker);
							}
						}
						if( pvArr ){
							pCur = pvArr;
						}
					}
					while ( zIn < zEnd && zIn[0] != ']' ){
						zIn++;
					}
				}
				zIn++;
			}
			if( !is_array ){
				iLen = (int)(zIn-zCur);
			}
			/* Trim the key */
			SyStringInitFromBuf(&sEntry,zCur,iLen);
			SyStringFullTrim(&sEntry);
			if( sEntry.nByte > 0 ){
				if( !is_array ){
					/* Save the key name */
					ph7_value_string(pWorker,sEntry.zString,(int)sEntry.nByte);
				}
				/* extract key value */
				ph7_value_reset_string_cursor(pValue);
				zIn++; /* '=' */
				while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && SyisSpace(zIn[0]) ){
					zIn++;
				}
				if( zIn < zEnd ){
					zCur = zIn;
					c = zIn[0];
					if( c == '"' || c == '\'' ){
						zIn++;
						/* Delimit the value */
						while( zIn < zEnd ){
							if ( zIn[0] == c && zIn[-1] != '\\' ){
								break;
							}
							zIn++;
						}
						if( zIn < zEnd ){
							zIn++;
						}
					}else{
						while( zIn < zEnd ){
							if( zIn[0] == '\n' ){
								if( zIn[-1] != '\\' ){
									break;
								}
							}else if( zIn[0] == ';' || zIn[0] == '#' ){
								/* Inline comments */
								break;
							}
							zIn++;
						}
					}
					/* Trim the value */
					SyStringInitFromBuf(&sEntry,zCur,(int)(zIn-zCur));
					SyStringFullTrim(&sEntry);
					if( c == '"' || c == '\'' ){
						SyStringTrimLeadingChar(&sEntry,c);
						SyStringTrimTrailingChar(&sEntry,c);
					}
					if( sEntry.nByte > 0 ){
						ph7_value_string(pValue,sEntry.zString,(int)sEntry.nByte);
					}
					/* Insert the key and it's value */
					ph7_array_add_elem(pCur,is_array ? 0 /*Automatic index assign */: pWorker,pValue);
				}
			}else{
				while( zIn < zEnd && (unsigned char)zIn[0] < 0xc0 && ( SyisSpace(zIn[0]) || zIn[0] == '=' ) ){
					zIn++;
				}
			}
			pCur = pOldCur;
		}
	}
	SyHashRelease(&sHash);
	/* Return the parse of the INI string */
	ph7_result_value(pCtx,pArray);
	return SXRET_OK;
}
/*
 * array parse_ini_string(string $ini[,bool $process_sections = false[,int $scanner_mode = INI_SCANNER_NORMAL ]])
 *  Parse a configuration string.
 * Parameters
 *  $ini
 *   The contents of the ini file being parsed.
 *  $process_sections
 *   By setting the process_sections parameter to TRUE, you get a multidimensional array, with the section names
 *   and settings included. The default for process_sections is FALSE.
 *  $scanner_mode (Not used)
 *   Can either be INI_SCANNER_NORMAL (default) or INI_SCANNER_RAW. If INI_SCANNER_RAW is supplied
 *   then option values will not be parsed.
 * Return
 *  The settings are returned as an associative array on success, and FALSE on failure.
 */
static int PH7_builtin_parse_ini_string(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIni;
	int nByte;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid arguments,return FALSE*/
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the raw INI buffer */
	zIni = ph7_value_to_string(apArg[0],&nByte);
	/* Process the INI buffer*/
	PH7_ParseIniString(pCtx,zIni,(sxu32)nByte,(nArg > 1) ? ph7_value_to_bool(apArg[1]) : 0);
	return PH7_OK;
}
/*
 * Ctype Functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * bool ctype_alnum(string $text)
 *  Checks if all of the characters in the provided string, text, are alphanumeric.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *   TRUE if every character in text is either a letter or a digit, FALSE otherwise.
 */
static int PH7_builtin_ctype_alnum(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( !SyisAlphaNum(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_alpha(string $text)
 *  Checks if all of the characters in the provided string, text, are alphabetic.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  TRUE if every character in text is a letter from the current locale, FALSE otherwise.
 */
static int PH7_builtin_ctype_alpha(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( !SyisAlpha(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_cntrl(string $text)
 *  Checks if all of the characters in the provided string, text, are control characters.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  TRUE if every character in text is a control characters,FALSE otherwise.
 */
static int PH7_builtin_ctype_cntrl(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisCtrl(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_digit(string $text)
 *  Checks if all of the characters in the provided string, text, are numerical.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  TRUE if every character in the string text is a decimal digit, FALSE otherwise.
 */
static int PH7_builtin_ctype_digit(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisDigit(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_xdigit(string $text)
 *  Check for character(s) representing a hexadecimal digit.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text is a hexadecimal 'digit', that is
 * a decimal digit or a character from [A-Fa-f] , FALSE otherwise. 
 */
static int PH7_builtin_ctype_xdigit(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisHex(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_graph(string $text)
 *  Checks if all of the characters in the provided string, text, creates visible output.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text is printable and actually creates visible output
 * (no white space), FALSE otherwise. 
 */
static int PH7_builtin_ctype_graph(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisGraph(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_print(string $text)
 *  Checks if all of the characters in the provided string, text, are printable.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text will actually create output (including blanks).
 *  Returns FALSE if text contains control characters or characters that do not have any output
 *  or control function at all. 
 */
static int PH7_builtin_ctype_print(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisPrint(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_punct(string $text)
 *  Checks if all of the characters in the provided string, text, are punctuation character.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text is printable, but neither letter
 *  digit or blank, FALSE otherwise.
 */
static int PH7_builtin_ctype_punct(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisPunct(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_space(string $text)
 *  Checks if all of the characters in the provided string, text, creates whitespace.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text creates some sort of white space, FALSE otherwise.
 *  Besides the blank character this also includes tab, vertical tab, line feed, carriage return
 *  and form feed characters. 
 */
static int PH7_builtin_ctype_space(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( zIn[0] >= 0xc0 ){
			/* UTF-8 stream  */
			break;
		}
		if( !SyisSpace(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_lower(string $text)
 *  Checks if all of the characters in the provided string, text, are lowercase letters.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text is a lowercase letter in the current locale. 
 */
static int PH7_builtin_ctype_lower(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( !SyisLower(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * bool ctype_upper(string $text)
 *  Checks if all of the characters in the provided string, text, are uppercase letters.
 * Parameters
 *  $text
 *   The tested string.
 * Return
 *  Returns TRUE if every character in text is a uppercase letter in the current locale. 
 */
static int PH7_builtin_ctype_upper(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const unsigned char *zIn,*zEnd;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the target string */
	zIn  = (const unsigned char *)ph7_value_to_string(apArg[0],&nLen);
	zEnd = &zIn[nLen];
	if( nLen < 1 ){
		/* Empty string,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the requested operation */
	for(;;){
		if( zIn >= zEnd ){
			/* If we reach the end of the string,then the test succeeded. */
			ph7_result_bool(pCtx,1);
			return PH7_OK;
		}
		if( !SyisUpper(zIn[0]) ){
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	/* The test failed,return FALSE */
	ph7_result_bool(pCtx,0);
	return PH7_OK;
}
/*
 * Date/Time functions
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Devel.
 */
#include <time.h>
#ifdef __WINNT__
/* GetSystemTime() */
#include <Windows.h> 
#ifdef _WIN32_WCE
/*
** WindowsCE does not have a localtime() function.  So create a
** substitute.
** Taken from the SQLite3 source tree.
** Status: Public domain
*/
struct tm *__cdecl localtime(const time_t *t)
{
  static struct tm y;
  FILETIME uTm, lTm;
  SYSTEMTIME pTm;
  ph7_int64 t64;
  t64 = *t;
  t64 = (t64 + 11644473600)*10000000;
  uTm.dwLowDateTime = (DWORD)(t64 & 0xFFFFFFFF);
  uTm.dwHighDateTime= (DWORD)(t64 >> 32);
  FileTimeToLocalFileTime(&uTm,&lTm);
  FileTimeToSystemTime(&lTm,&pTm);
  y.tm_year = pTm.wYear - 1900;
  y.tm_mon = pTm.wMonth - 1;
  y.tm_wday = pTm.wDayOfWeek;
  y.tm_mday = pTm.wDay;
  y.tm_hour = pTm.wHour;
  y.tm_min = pTm.wMinute;
  y.tm_sec = pTm.wSecond;
  return &y;
}
#endif /*_WIN32_WCE */
#elif defined(__UNIXES__)
#include <sys/time.h>
#endif /* __WINNT__*/
 /*
  * int64 time(void)
  *  Current Unix timestamp
  * Parameters
  *  None.
  * Return
  *  Returns the current time measured in the number of seconds
  *  since the Unix Epoch (January 1 1970 00:00:00 GMT).
  */
static int PH7_builtin_time(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	time_t tt;
	SXUNUSED(nArg); /* cc warning */
	SXUNUSED(apArg);
	/* Extract the current time */
	time(&tt);
	/* Return as 64-bit integer */
	ph7_result_int64(pCtx,(ph7_int64)tt);
	return  PH7_OK;
}
/*
  * string/float microtime([ bool $get_as_float = false ])
  *  microtime() returns the current Unix timestamp with microseconds.
  * Parameters
  *  $get_as_float
  *   If used and set to TRUE, microtime() will return a float instead of a string
  *   as described in the return values section below.
  * Return
  *  By default, microtime() returns a string in the form "msec sec", where sec 
  *  is the current time measured in the number of seconds since the Unix 
  *  epoch (0:00:00 January 1, 1970 GMT), and msec is the number of microseconds
  *  that have elapsed since sec expressed in seconds.
  *  If get_as_float is set to TRUE, then microtime() returns a float, which represents
  *  the current time in seconds since the Unix epoch accurate to the nearest microsecond. 
  */
static int PH7_builtin_microtime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int bFloat = 0;
	sytime sTime;	
#if defined(__UNIXES__)
	struct timeval tv;
	gettimeofday(&tv,0);
	sTime.tm_sec  = (long)tv.tv_sec;
	sTime.tm_usec = (long)tv.tv_usec;
#else
	time_t tt;
	time(&tt);
	sTime.tm_sec  = (long)tt;
	sTime.tm_usec = (long)(tt%SX_USEC_PER_SEC);
#endif /* __UNIXES__ */
	if( nArg > 0 ){
		bFloat = ph7_value_to_bool(apArg[0]);
	}
	if( bFloat ){
		/* Return as float */
		ph7_result_double(pCtx,(double)sTime.tm_sec);
	}else{
		/* Return as string */
		ph7_result_string_format(pCtx,"%ld %ld",sTime.tm_usec,sTime.tm_sec);
	}
	return PH7_OK;
}
/*
 * array getdate ([ int $timestamp = time() ])
 *  Get date/time information.
 * Parameter
 *  $timestamp: The optional timestamp parameter is an integer Unix timestamp
 *     that defaults to the current local time if a timestamp is not given.
 *     In other words, it defaults to the value of time().
 * Returns
 *  Returns an associative array of information related to the timestamp.
 *  Elements from the returned associative array are as follows: 
 *   KEY                                                         VALUE
 * ---------                                                    -------
 * "seconds" 	Numeric representation of seconds 	            0 to 59
 * "minutes" 	Numeric representation of minutes 	            0 to 59
 * "hours" 	    Numeric representation of hours 	            0 to 23
 * "mday" 	    Numeric representation of the day of the month 	1 to 31
 * "wday" 	    Numeric representation of the day of the week 	0 (for Sunday) through 6 (for Saturday)
 * "mon" 	    Numeric representation of a month 	            1 through 12
 * "year" 	    A full numeric representation of a year,        4 digits 	Examples: 1999 or 2003
 * "yday" 	    Numeric representation of the day of the year   0 through 365
 * "weekday" 	A full textual representation of the day of the week 	Sunday through Saturday
 * "month" 	    A full textual representation of a month, such as January or March 	January through December
 * 0 	        Seconds since the Unix Epoch, similar to the values returned by time() and used by date(). 
 * NOTE:
 *   NULL is returned on failure.
 */
static int PH7_builtin_getdate(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pValue,*pArray;
	Sytm sTm;
	if( nArg < 1 ){
#ifdef __WINNT__
		SYSTEMTIME sOS;
		GetSystemTime(&sOS);
		SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
		struct tm *pTm;
		time_t t;
		time(&t);
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	}else{
		/* Use the given timestamp */
		time_t t;
		struct tm *pTm;
#ifdef __WINNT__
#ifdef _MSC_VER
#if _MSC_VER >= 1400 /* Visual Studio 2005 and up */
#pragma warning(disable:4996) /* _CRT_SECURE...*/
#endif
#endif
#endif
		if( ph7_value_is_int(apArg[0]) ){
			t = (time_t)ph7_value_to_int64(apArg[0]);
			pTm = localtime(&t);
			if( pTm == 0 ){
				time(&t);
			}
		}else{
			time(&t);
		}
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
	}
	/* Element value */
	pValue = ph7_context_new_scalar(pCtx);
	if( pValue == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Fill the array */
	/* Seconds */
	ph7_value_int(pValue,sTm.tm_sec);
	ph7_array_add_strkey_elem(pArray,"seconds",pValue);
	/* Minutes */
	ph7_value_int(pValue,sTm.tm_min);
	ph7_array_add_strkey_elem(pArray,"minutes",pValue);
	/* Hours */
	ph7_value_int(pValue,sTm.tm_hour);
	ph7_array_add_strkey_elem(pArray,"hours",pValue);
	/* mday */
	ph7_value_int(pValue,sTm.tm_mday);
	ph7_array_add_strkey_elem(pArray,"mday",pValue);
	/* wday */
	ph7_value_int(pValue,sTm.tm_wday);
	ph7_array_add_strkey_elem(pArray,"wday",pValue);
	/* mon */
	ph7_value_int(pValue,sTm.tm_mon+1);
	ph7_array_add_strkey_elem(pArray,"mon",pValue);
	/* year */
	ph7_value_int(pValue,sTm.tm_year);
	ph7_array_add_strkey_elem(pArray,"year",pValue);
	/* yday */
	ph7_value_int(pValue,sTm.tm_yday);
	ph7_array_add_strkey_elem(pArray,"yday",pValue);
	/* Weekday */
	ph7_value_string(pValue,SyTimeGetDay(sTm.tm_wday),-1);
	ph7_array_add_strkey_elem(pArray,"weekday",pValue);
	/* Month */
	ph7_value_reset_string_cursor(pValue);
	ph7_value_string(pValue,SyTimeGetMonth(sTm.tm_mon),-1);
	ph7_array_add_strkey_elem(pArray,"month",pValue);
	/* Seconds since the epoch */
	ph7_value_int64(pValue,(ph7_int64)time(0));
	ph7_array_add_intkey_elem(pArray,0 /* Index zero */,pValue);
	/* Return the freshly created array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * mixed gettimeofday([ bool $return_float = false ] )
 *   Returns an associative array containing the data returned from the system call.
 * Parameters
 *  $return_float
 *   When set to TRUE, a float instead of an array is returned.
 * Return
 *   By default an array is returned. If return_float is set, then
 *   a float is returned. 
 */
static int PH7_builtin_gettimeofday(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	int bFloat = 0;
	sytime sTime;
#if defined(__UNIXES__)
	struct timeval tv;
	gettimeofday(&tv,0);
	sTime.tm_sec  = (long)tv.tv_sec;
	sTime.tm_usec = (long)tv.tv_usec;
#else
	time_t tt;
	time(&tt);
	sTime.tm_sec  = (long)tt;
	sTime.tm_usec = (long)(tt%SX_USEC_PER_SEC);
#endif /* __UNIXES__ */
	if( nArg > 0 ){
		bFloat = ph7_value_to_bool(apArg[0]);
	}
	if( bFloat ){
		/* Return as float */
		ph7_result_double(pCtx,(double)sTime.tm_sec);
	}else{
		/* Return an associative array */
		ph7_value *pValue,*pArray;
		/* Create a new array */
		pArray = ph7_context_new_array(pCtx);
		/* Element value */
		pValue = ph7_context_new_scalar(pCtx);
		if( pValue == 0 || pArray == 0 ){
			/* Return NULL */
			ph7_result_null(pCtx);
			return PH7_OK;
		}
		/* Fill the array */
		/* sec */
		ph7_value_int64(pValue,sTime.tm_sec);
		ph7_array_add_strkey_elem(pArray,"sec",pValue);
		/* usec */
		ph7_value_int64(pValue,sTime.tm_usec);
		ph7_array_add_strkey_elem(pArray,"usec",pValue);
		/* Return the array */
		ph7_result_value(pCtx,pArray);
	}
	return PH7_OK;
}
/* Check if the given year is leap or not */
#define IS_LEAP_YEAR(YEAR)	(YEAR % 400 ? ( YEAR % 100 ? ( YEAR % 4 ? 0 : 1 ) : 0 ) : 1)
/* ISO-8601 numeric representation of the day of the week */
static const int aISO8601[] = { 7 /* Sunday */,1 /* Monday */,2,3,4,5,6 };
/*
 * Format a given date string.
 * Supported format: (Taken from PHP online docs)
 * character 	Description
 * d          Day of the month 
 * D          A textual representation of a days
 * j          Day of the month without leading zeros
 * l          A full textual representation of the day of the week 	
 * N          ISO-8601 numeric representation of the day of the week 
 * w          Numeric representation of the day of the week
 * z          The day of the year (starting from 0) 	
 * F          A full textual representation of a month, such as January or March
 * m          Numeric representation of a month, with leading zeros 	01 through 12
 * M          A short textual representation of a month, three letters 	Jan through Dec
 * n          Numeric representation of a month, without leading zeros 	1 through 12
 * t          Number of days in the given month 	28 through 31
 * L          Whether it's a leap year 	1 if it is a leap year, 0 otherwise.
 * o          ISO-8601 year number. This has the same value as Y, except that if the ISO week number
 *            (W) belongs to the previous or next year, that year is used instead. (added in PHP 5.1.0) Examples: 1999 or 2003
 * Y          A full numeric representation of a year, 4 digits 	Examples: 1999 or 2003
 * y          A two digit representation of a year 	Examples: 99 or 03
 * a          Lowercase Ante meridiem and Post meridiem 	am or pm
 * A          Uppercase Ante meridiem and Post meridiem 	AM or PM
 * g          12-hour format of an hour without leading zeros 	1 through 12
 * G          24-hour format of an hour without leading zeros 	0 through 23
 * h          12-hour format of an hour with leading zeros 	01 through 12
 * H          24-hour format of an hour with leading zeros 	00 through 23
 * i          Minutes with leading zeros 	00 to 59
 * s          Seconds, with leading zeros 	00 through 59
 * u          Microseconds Example: 654321
 * e          Timezone identifier 	Examples: UTC, GMT, Atlantic/Azores
 * I          (capital i) Whether or not the date is in daylight saving time 	1 if Daylight Saving Time, 0 otherwise.
 * r          RFC 2822 formatted date 	Example: Thu, 21 Dec 2000 16:01:07 +0200
 * U          Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
 * S          English ordinal suffix for the day of the month, 2 characters
 * O          Difference to Greenwich time (GMT) in hours
 * Z          Timezone offset in seconds. The offset for timezones west of UTC is always negative, and for those
 *            east of UTC is always positive.
 * c         ISO 8601 date
 */
static sxi32 DateFormat(ph7_context *pCtx,const char *zIn,int nLen,Sytm *pTm)
{
	const char *zEnd = &zIn[nLen];
	const char *zCur;
	/* Start the format process */
	for(;;){
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		switch(zIn[0]){
		case 'd':
			/* Day of the month, 2 digits with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_mday);
			break;
		case 'D':
			/*A textual representation of a day, three letters*/
			zCur = SyTimeGetDay(pTm->tm_wday);
			ph7_result_string(pCtx,zCur,3);
			break;
		case 'j':
			/*	Day of the month without leading zeros */
			ph7_result_string_format(pCtx,"%d",pTm->tm_mday);
			break;
		case 'l':
			/* A full textual representation of the day of the week */
			zCur = SyTimeGetDay(pTm->tm_wday);
			ph7_result_string(pCtx,zCur,-1/*Compute length automatically*/);
			break;
		case 'N':{
			/* ISO-8601 numeric representation of the day of the week */
			ph7_result_string_format(pCtx,"%d",aISO8601[pTm->tm_wday % 7 ]);
			break;
				 }
		case 'w':
			/*Numeric representation of the day of the week*/
			ph7_result_string_format(pCtx,"%d",pTm->tm_wday);
			break;
		case 'z':
			/*The day of the year*/
			ph7_result_string_format(pCtx,"%d",pTm->tm_yday);
			break;
		case 'F':
			/*A full textual representation of a month, such as January or March*/
			zCur = SyTimeGetMonth(pTm->tm_mon);
			ph7_result_string(pCtx,zCur,-1/*Compute length automatically*/);
			break;
		case 'm':
			/*Numeric representation of a month, with leading zeros*/
			ph7_result_string_format(pCtx,"%02d",pTm->tm_mon + 1);
			break;
		case 'M':
			/*A short textual representation of a month, three letters*/
			zCur = SyTimeGetMonth(pTm->tm_mon);
			ph7_result_string(pCtx,zCur,3);
			break;
		case 'n':
			/*Numeric representation of a month, without leading zeros*/
			ph7_result_string_format(pCtx,"%d",pTm->tm_mon + 1);
			break;
		case 't':{
			static const int aMonDays[] = {31,29,31,30,31,30,31,31,30,31,30,31 };
			int nDays = aMonDays[pTm->tm_mon % 12 ];
			if( pTm->tm_mon == 1 /* 'February' */ && !IS_LEAP_YEAR(pTm->tm_year) ){
				nDays = 28;
			}
			/*Number of days in the given month*/
			ph7_result_string_format(pCtx,"%d",nDays);
			break;
				 }
		case 'L':{
			int isLeap = IS_LEAP_YEAR(pTm->tm_year);
			/* Whether it's a leap year */
			ph7_result_string_format(pCtx,"%d",isLeap);
			break;
				 }
		case 'o':
			/* ISO-8601 year number.*/
			ph7_result_string_format(pCtx,"%4d",pTm->tm_year);
			break;
		case 'Y':
			/*	A full numeric representation of a year, 4 digits */
			ph7_result_string_format(pCtx,"%4d",pTm->tm_year);
			break;
		case 'y':
			/*A two digit representation of a year*/
			ph7_result_string_format(pCtx,"%02d",pTm->tm_year%100);
			break;
		case 'a':
			/*	Lowercase Ante meridiem and Post meridiem */
			ph7_result_string(pCtx,pTm->tm_hour > 12 ? "pm" : "am",2);
			break;
		case 'A':
			/*	Uppercase Ante meridiem and Post meridiem */
			ph7_result_string(pCtx,pTm->tm_hour > 12 ? "PM" : "AM",2);
			break;
		case 'g':
			/*	12-hour format of an hour without leading zeros*/
			ph7_result_string_format(pCtx,"%d",1+(pTm->tm_hour%12));
			break;
		case 'G':
			/* 24-hour format of an hour without leading zeros */
			ph7_result_string_format(pCtx,"%d",pTm->tm_hour);
			break;
		case 'h':
			/* 12-hour format of an hour with leading zeros */
			ph7_result_string_format(pCtx,"%02d",1+(pTm->tm_hour%12));
			break;
		case 'H':
			/*	24-hour format of an hour with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_hour);
			break;
		case 'i':
			/* 	Minutes with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_min);
			break;
		case 's':
			/* 	second with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_sec);
			break;
		case 'u':
			/* 	Microseconds */
			ph7_result_string_format(pCtx,"%u",pTm->tm_sec * SX_USEC_PER_SEC);
			break;
		case 'S':{
			/* English ordinal suffix for the day of the month, 2 characters */
			static const char zSuffix[] = "thstndrdthththththth";
			int v = pTm->tm_mday;
			ph7_result_string(pCtx,&zSuffix[2 * (int)(v / 10 % 10 != 1 ? v % 10 : 0)],(int)sizeof(char) * 2);
			break;
				 }
		case 'e':
			/* 	Timezone identifier */
			zCur = pTm->tm_zone;
			if( zCur == 0 ){
				/* Assume GMT */
				zCur = "GMT";
			}
			ph7_result_string(pCtx,zCur,-1);
			break;
		case 'I':
			/* Whether or not the date is in daylight saving time */
#ifdef __WINNT__
#ifdef _MSC_VER
#ifndef _WIN32_WCE
			_get_daylight(&pTm->tm_isdst);
#endif
#endif
#endif
			ph7_result_string_format(pCtx,"%d",pTm->tm_isdst == 1);
			break;
		case 'r':
			/* RFC 2822 formatted date 	Example: Thu, 21 Dec 2000 16:01:07 */
			ph7_result_string_format(pCtx,"%.3s, %02d %.3s %4d %02d:%02d:%02d",
				SyTimeGetDay(pTm->tm_wday),
				pTm->tm_mday,
				SyTimeGetMonth(pTm->tm_mon),
				pTm->tm_year,
				pTm->tm_hour,
				pTm->tm_min,
				pTm->tm_sec
				);
			break;
		case 'U':{
			time_t tt;
			/* Seconds since the Unix Epoch */
			time(&tt);
			ph7_result_string_format(pCtx,"%u",(unsigned int)tt);
			break;
				 }
		case 'O':
		case 'P':
			/* Difference to Greenwich time (GMT) in hours */
			ph7_result_string_format(pCtx,"%+05d",pTm->tm_gmtoff);
			break;
		case 'Z':
			/* Timezone offset in seconds. The offset for timezones west of UTC
			 * is always negative, and for those east of UTC is always positive.
			 */
			ph7_result_string_format(pCtx,"%+05d",pTm->tm_gmtoff);
			break;
		case 'c':
			/* 	ISO 8601 date */
			ph7_result_string_format(pCtx,"%4d-%02d-%02dT%02d:%02d:%02d%+05d",
				pTm->tm_year,
				pTm->tm_mon+1,
				pTm->tm_mday,
				pTm->tm_hour,
				pTm->tm_min,
				pTm->tm_sec,
				pTm->tm_gmtoff
				);
			break;
		case '\\':
			zIn++;
			/* Expand verbatim */
			if( zIn < zEnd ){
				ph7_result_string(pCtx,zIn,(int)sizeof(char));
			}
			break;
		default:
			/* Unknown format specifer,expand verbatim */
			ph7_result_string(pCtx,zIn,(int)sizeof(char));
			break;
		}
		/* Point to the next character */
		zIn++;
	}
	return SXRET_OK;
}
/*
 * PH7 implementation of the strftime() function.
 * The following formats are supported:
 * %a 	An abbreviated textual representation of the day
 * %A 	A full textual representation of the day
 * %d 	Two-digit day of the month (with leading zeros)
 * %e 	Day of the month, with a space preceding single digits.
 * %j 	Day of the year, 3 digits with leading zeros 
 * %u 	ISO-8601 numeric representation of the day of the week 	1 (for Monday) though 7 (for Sunday)
 * %w 	Numeric representation of the day of the week 0 (for Sunday) through 6 (for Saturday)
 * %U 	Week number of the given year, starting with the first Sunday as the first week
 * %V 	ISO-8601:1988 week number of the given year, starting with the first week of the year with at least
 *   4 weekdays, with Monday being the start of the week.
 * %W 	A numeric representation of the week of the year
 * %b 	Abbreviated month name, based on the locale
 * %B 	Full month name, based on the locale
 * %h 	Abbreviated month name, based on the locale (an alias of %b)
 * %m 	Two digit representation of the month
 * %C 	Two digit representation of the century (year divided by 100, truncated to an integer)
 * %g 	Two digit representation of the year going by ISO-8601:1988 standards (see %V)
 * %G 	The full four-digit version of %g
 * %y 	Two digit representation of the year
 * %Y 	Four digit representation for the year
 * %H 	Two digit representation of the hour in 24-hour format
 * %I 	Two digit representation of the hour in 12-hour format
 * %l (lower-case 'L') 	Hour in 12-hour format, with a space preceeding single digits
 * %M 	Two digit representation of the minute
 * %p 	UPPER-CASE 'AM' or 'PM' based on the given time
 * %P 	lower-case 'am' or 'pm' based on the given time
 * %r 	Same as "%I:%M:%S %p"
 * %R 	Same as "%H:%M"
 * %S 	Two digit representation of the second
 * %T 	Same as "%H:%M:%S"
 * %X 	Preferred time representation based on locale, without the date
 * %z 	Either the time zone offset from UTC or the abbreviation
 * %Z 	The time zone offset/abbreviation option NOT given by %z
 * %c 	Preferred date and time stamp based on local
 * %D 	Same as "%m/%d/%y"
 * %F 	Same as "%Y-%m-%d"
 * %s 	Unix Epoch Time timestamp (same as the time() function)
 * %x 	Preferred date representation based on locale, without the time
 * %n 	A newline character ("\n")
 * %t 	A Tab character ("\t")
 * %% 	A literal percentage character ("%")
 */
static int PH7_Strftime(
	ph7_context *pCtx,  /* Call context */
	const char *zIn,    /* Input string */
	int nLen,           /* Input length */
	Sytm *pTm           /* Parse of the given time */
	)
{
	const char *zCur,*zEnd = &zIn[nLen];
	int c;
	/* Start the format process */
	for(;;){
		zCur = zIn;
		while(zIn < zEnd && zIn[0] != '%' ){
			zIn++;
		}
		if( zIn > zCur ){
			/* Consume input verbatim */
			ph7_result_string(pCtx,zCur,(int)(zIn-zCur));
		}
		zIn++; /* Jump the percent sign */
		if( zIn >= zEnd ){
			/* No more input to process */
			break;
		}
		c = zIn[0];
		/* Act according to the current specifer */
		switch(c){
		case '%':
			/* A literal percentage character ("%") */
			ph7_result_string(pCtx,"%",(int)sizeof(char));
			break;
		case 't':
			/* A Tab character */
			ph7_result_string(pCtx,"\t",(int)sizeof(char));
			break;
		case 'n':
			/* A newline character */
			ph7_result_string(pCtx,"\n",(int)sizeof(char));
			break;
		case 'a':
			/* An abbreviated textual representation of the day */
			ph7_result_string(pCtx,SyTimeGetDay(pTm->tm_wday),(int)sizeof(char)*3);
			break;
		case 'A':
			/* A full textual representation of the day */
			ph7_result_string(pCtx,SyTimeGetDay(pTm->tm_wday),-1/*Compute length automatically*/);
			break;
		case 'e':
			/* Day of the month, 2 digits with leading space for single digit*/
			ph7_result_string_format(pCtx,"%2d",pTm->tm_mday);
			break;
		case 'd':
			/* Two-digit day of the month (with leading zeros) */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_mon+1);
			break;
		case 'j':
			/*The day of the year,3 digits with leading zeros*/
			ph7_result_string_format(pCtx,"%03d",pTm->tm_yday);
			break;
		case 'u':
			/* ISO-8601 numeric representation of the day of the week */
			ph7_result_string_format(pCtx,"%d",aISO8601[pTm->tm_wday % 7 ]);
			break;
		case 'w':
			/* Numeric representation of the day of the week */
			ph7_result_string_format(pCtx,"%d",pTm->tm_wday);
			break;
		case 'b':
		case 'h':
			/*A short textual representation of a month, three letters (Not based on locale)*/
			ph7_result_string(pCtx,SyTimeGetMonth(pTm->tm_mon),(int)sizeof(char)*3);
			break;
		case 'B':
			/* Full month name (Not based on locale) */
			ph7_result_string(pCtx,SyTimeGetMonth(pTm->tm_mon),-1/*Compute length automatically*/);
			break;
		case 'm':
			/*Numeric representation of a month, with leading zeros*/
			ph7_result_string_format(pCtx,"%02d",pTm->tm_mon + 1);
			break;
		case 'C':
			/* Two digit representation of the century */
			ph7_result_string_format(pCtx,"%2d",pTm->tm_year/100);
			break;
		case 'y':
		case 'g':
			/* Two digit representation of the year */
			ph7_result_string_format(pCtx,"%2d",pTm->tm_year%100);
			break;
		case 'Y':
		case 'G':
			/* Four digit representation of the year */
			ph7_result_string_format(pCtx,"%4d",pTm->tm_year);
			break;
		case 'I':
			/* 12-hour format of an hour with leading zeros */
			ph7_result_string_format(pCtx,"%02d",1+(pTm->tm_hour%12));
			break;
		case 'l':
			/* 12-hour format of an hour with leading space */
			ph7_result_string_format(pCtx,"%2d",1+(pTm->tm_hour%12));
			break;
		case 'H':
			/* 24-hour format of an hour with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_hour);
			break;
		case 'M':
			/* Minutes with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_min);
			break;
		case 'S':
			/* Seconds with leading zeros */
			ph7_result_string_format(pCtx,"%02d",pTm->tm_sec);
			break;
		case 'z':
		case 'Z':
			/* 	Timezone identifier */
			zCur = pTm->tm_zone;
			if( zCur == 0 ){
				/* Assume GMT */
				zCur = "GMT";
			}
			ph7_result_string(pCtx,zCur,-1);
			break;
		case 'T':
		case 'X':
			/* Same as "%H:%M:%S" */
			ph7_result_string_format(pCtx,"%02d:%02d:%02d",pTm->tm_hour,pTm->tm_min,pTm->tm_sec);
			break;
		case 'R':
			/* Same as "%H:%M" */
			ph7_result_string_format(pCtx,"%02d:%02d",pTm->tm_hour,pTm->tm_min);
			break;
		case 'P':
			/*	Lowercase Ante meridiem and Post meridiem */
			ph7_result_string(pCtx,pTm->tm_hour > 12 ? "pm" : "am",(int)sizeof(char)*2);
			break;
		case 'p':
			/*	Uppercase Ante meridiem and Post meridiem */
			ph7_result_string(pCtx,pTm->tm_hour > 12 ? "PM" : "AM",(int)sizeof(char)*2);
			break;
		case 'r':
			/* Same as "%I:%M:%S %p" */
			ph7_result_string_format(pCtx,"%02d:%02d:%02d %s",
				1+(pTm->tm_hour%12),
				pTm->tm_min,
				pTm->tm_sec,
				pTm->tm_hour > 12 ? "PM" : "AM"
				);
			break;
		case 'D':
		case 'x':
			/* Same as "%m/%d/%y" */
			ph7_result_string_format(pCtx,"%02d/%02d/%02d",
				pTm->tm_mon+1,
				pTm->tm_mday,
				pTm->tm_year%100
				);
			break;
		case 'F':
			/* Same as "%Y-%m-%d" */
			ph7_result_string_format(pCtx,"%d-%02d-%02d",
				pTm->tm_year,
				pTm->tm_mon+1,
				pTm->tm_mday
				);
			break;
		case 'c':
			ph7_result_string_format(pCtx,"%d-%02d-%02d %02d:%02d:%02d",
				pTm->tm_year,
				pTm->tm_mon+1,
				pTm->tm_mday,
				pTm->tm_hour,
				pTm->tm_min,
				pTm->tm_sec
				);
			break;
		case 's':{
			time_t tt;
			/* Seconds since the Unix Epoch */
			time(&tt);
			ph7_result_string_format(pCtx,"%u",(unsigned int)tt);
			break;
				 }
		default:
			/* unknown specifer,simply ignore*/
			break;
		}
		/* Advance the cursor */
		zIn++;
	}
	return SXRET_OK;
}
/*
 * string date(string $format [, int $timestamp = time() ] )
 *  Returns a string formatted according to the given format string using
 *  the given integer timestamp or the current time if no timestamp is given.
 *  In other words, timestamp is optional and defaults to the value of time(). 
 * Parameters
 *  $format
 *   The format of the outputted date string (See code above)
 * $timestamp
 *   The optional timestamp parameter is an integer Unix timestamp
 *   that defaults to the current local time if a timestamp is not given.
 *   In other words, it defaults to the value of time(). 
 * Return
 *  A formatted date string. If a non-numeric value is used for timestamp, FALSE is returned.
 */
static int PH7_builtin_date(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFormat;
	int nLen;
	Sytm sTm;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Don't bother processing return the empty string */
		ph7_result_string(pCtx,"",0);
	}
	if( nArg < 2 ){
#ifdef __WINNT__
		SYSTEMTIME sOS;
		GetSystemTime(&sOS);
		SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
		struct tm *pTm;
		time_t t;
		time(&t);
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	}else{
		/* Use the given timestamp */
		time_t t;
		struct tm *pTm;
		if( ph7_value_is_int(apArg[1]) ){
			t = (time_t)ph7_value_to_int64(apArg[1]);
			pTm = localtime(&t);
			if( pTm == 0 ){
				time(&t);
			}
		}else{
			time(&t);
		}
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
	}
	/* Format the given string */
	DateFormat(pCtx,zFormat,nLen,&sTm);
	return PH7_OK;
}
/*
 * string strftime(string $format [, int $timestamp = time() ] )
 *  Format a local time/date (PLATFORM INDEPENDANT IMPLEENTATION NOT BASED ON LOCALE)
 * Parameters
 *  $format
 *   The format of the outputted date string (See code above)
 * $timestamp
 *   The optional timestamp parameter is an integer Unix timestamp
 *   that defaults to the current local time if a timestamp is not given.
 *   In other words, it defaults to the value of time(). 
 * Return
 * Returns a string formatted according format using the given timestamp
 * or the current local time if no timestamp is given.
 */
static int PH7_builtin_strftime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFormat;
	int nLen;
	Sytm sTm;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Don't bother processing return FALSE */
		ph7_result_bool(pCtx,0);
	}
	if( nArg < 2 ){
#ifdef __WINNT__
		SYSTEMTIME sOS;
		GetSystemTime(&sOS);
		SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
		struct tm *pTm;
		time_t t;
		time(&t);
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	}else{
		/* Use the given timestamp */
		time_t t;
		struct tm *pTm;
		if( ph7_value_is_int(apArg[1]) ){
			t = (time_t)ph7_value_to_int64(apArg[1]);
			pTm = localtime(&t);
			if( pTm == 0 ){
				time(&t);
			}
		}else{
			time(&t);
		}
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
	}
	/* Format the given string */
	PH7_Strftime(pCtx,zFormat,nLen,&sTm);
	if( ph7_context_result_buf_length(pCtx) < 1 ){
		/* Nothing was formatted,return FALSE */
		ph7_result_bool(pCtx,0);
	}
	return PH7_OK;
}
/*
 * string gmdate(string $format [, int $timestamp = time() ] )
 *  Identical to the date() function except that the time returned
 *  is Greenwich Mean Time (GMT).
 * Parameters
 *  $format
 *  The format of the outputted date string (See code above)
 *  $timestamp
 *   The optional timestamp parameter is an integer Unix timestamp
 *   that defaults to the current local time if a timestamp is not given.
 *   In other words, it defaults to the value of time(). 
 * Return
 *  A formatted date string. If a non-numeric value is used for timestamp, FALSE is returned.
 */
static int PH7_builtin_gmdate(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFormat;
	int nLen;
	Sytm sTm;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Don't bother processing return the empty string */
		ph7_result_string(pCtx,"",0);
	}
	if( nArg < 2 ){
#ifdef __WINNT__
		SYSTEMTIME sOS;
		GetSystemTime(&sOS);
		SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
		struct tm *pTm;
		time_t t;
		time(&t);
		pTm = gmtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	}else{
		/* Use the given timestamp */
		time_t t;
		struct tm *pTm;
		if( ph7_value_is_int(apArg[1]) ){
			t = (time_t)ph7_value_to_int64(apArg[1]);
			pTm = gmtime(&t);
			if( pTm == 0 ){
				time(&t);
			}
		}else{
			time(&t);
		}
		pTm = gmtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
	}
	/* Format the given string */
	DateFormat(pCtx,zFormat,nLen,&sTm);
	return PH7_OK;
}
/*
 * array localtime([ int $timestamp = time() [, bool $is_associative = false ]])
 *  Return the local time.
 * Parameter
 *  $timestamp: The optional timestamp parameter is an integer Unix timestamp
 *     that defaults to the current local time if a timestamp is not given.
 *     In other words, it defaults to the value of time().
 * $is_associative
 *   If set to FALSE or not supplied then the array is returned as a regular, numerically
 *   indexed array. If the argument is set to TRUE then localtime() returns an associative
 *   array containing all the different elements of the structure returned by the C function
 *   call to localtime. The names of the different keys of the associative array are as follows:
 *      "tm_sec" - seconds, 0 to 59
 *      "tm_min" - minutes, 0 to 59
 *      "tm_hour" - hours, 0 to 23
 *      "tm_mday" - day of the month, 1 to 31
 *      "tm_mon" - month of the year, 0 (Jan) to 11 (Dec)
 *      "tm_year" - years since 1900
 *      "tm_wday" - day of the week, 0 (Sun) to 6 (Sat)
 *      "tm_yday" - day of the year, 0 to 365
 *      "tm_isdst" - is daylight savings time in effect? Positive if yes, 0 if not, negative if unknown.
 * Returns
 *  An associative array of information related to the timestamp.
 */
static int PH7_builtin_localtime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	ph7_value *pValue,*pArray;
	int isAssoc = 0;
	Sytm sTm;
	if( nArg < 1 ){
#ifdef __WINNT__
		SYSTEMTIME sOS;
		GetSystemTime(&sOS); /* TODO(chems): GMT not local */
		SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
		struct tm *pTm;
		time_t t;
		time(&t);
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	}else{
		/* Use the given timestamp */
		time_t t;
		struct tm *pTm;
		if( ph7_value_is_int(apArg[0]) ){
			t = (time_t)ph7_value_to_int64(apArg[0]);
			pTm = localtime(&t);
			if( pTm == 0 ){
				time(&t);
			}
		}else{
			time(&t);
		}
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
	}
	/* Element value */
	pValue = ph7_context_new_scalar(pCtx);
	if( pValue == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	/* Create a new array */
	pArray = ph7_context_new_array(pCtx);
	if( pArray == 0 ){
		/* Return NULL */
		ph7_result_null(pCtx);
		return PH7_OK;
	}
	if( nArg > 1 ){
		isAssoc = ph7_value_to_bool(apArg[1]); 
	}
	/* Fill the array */
	/* Seconds */
	ph7_value_int(pValue,sTm.tm_sec);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_sec",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* Minutes */
	ph7_value_int(pValue,sTm.tm_min);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_min",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* Hours */
	ph7_value_int(pValue,sTm.tm_hour);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_hour",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* mday */
	ph7_value_int(pValue,sTm.tm_mday);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_mday",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* mon */
	ph7_value_int(pValue,sTm.tm_mon);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_mon",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* year since 1900 */
	ph7_value_int(pValue,sTm.tm_year-1900);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_year",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* wday */
	ph7_value_int(pValue,sTm.tm_wday);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_wday",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* yday */
	ph7_value_int(pValue,sTm.tm_yday);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_yday",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* isdst */
#ifdef __WINNT__
#ifdef _MSC_VER
#ifndef _WIN32_WCE
			_get_daylight(&sTm.tm_isdst);
#endif
#endif
#endif
	ph7_value_int(pValue,sTm.tm_isdst);
	if( isAssoc ){
		ph7_array_add_strkey_elem(pArray,"tm_isdst",pValue);
	}else{
		ph7_array_add_elem(pArray,0/* Automatic index */,pValue);
	}
	/* Return the array */
	ph7_result_value(pCtx,pArray);
	return PH7_OK;
}
/*
 * int idate(string $format [, int $timestamp = time() ])
 *  Returns a number formatted according to the given format string
 *  using the given integer timestamp or the current local time if 
 *  no timestamp is given. In other words, timestamp is optional and defaults
 *  to the value of time().
 *  Unlike the function date(), idate() accepts just one char in the format
 *  parameter.
 * $Parameters
 *  Supported format
 *   d 	Day of the month
 *   h 	Hour (12 hour format)
 *   H 	Hour (24 hour format)
 *   i 	Minutes
 *   I (uppercase i)1 if DST is activated, 0 otherwise
 *   L (uppercase l) returns 1 for leap year, 0 otherwise
 *   m 	Month number
 *   s 	Seconds
 *   t 	Days in current month
 *   U 	Seconds since the Unix Epoch - January 1 1970 00:00:00 UTC - this is the same as time()
 *   w 	Day of the week (0 on Sunday)
 *   W 	ISO-8601 week number of year, weeks starting on Monday
 *   y 	Year (1 or 2 digits - check note below)
 *   Y 	Year (4 digits)
 *   z 	Day of the year
 *   Z 	Timezone offset in seconds
 * $timestamp
 *  The optional timestamp parameter is an integer Unix timestamp that defaults
 *  to the current local time if a timestamp is not given. In other words, it defaults
 *  to the value of time(). 
 * Return
 *  An integer. 
 */
static int PH7_builtin_idate(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFormat;
	ph7_int64 iVal = 0;
	int nLen;
	Sytm sTm;
	if( nArg < 1 || !ph7_value_is_string(apArg[0]) ){
		/* Missing/Invalid argument,return -1 */
		ph7_result_int(pCtx,-1);
		return PH7_OK;
	}
	zFormat = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Don't bother processing return -1*/
		ph7_result_int(pCtx,-1);
	}
	if( nArg < 2 ){
#ifdef __WINNT__
		SYSTEMTIME sOS;
		GetSystemTime(&sOS);
		SYSTEMTIME_TO_SYTM(&sOS,&sTm);
#else
		struct tm *pTm;
		time_t t;
		time(&t);
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
#endif
	}else{
		/* Use the given timestamp */
		time_t t;
		struct tm *pTm;
		if( ph7_value_is_int(apArg[1]) ){
			t = (time_t)ph7_value_to_int64(apArg[1]);
			pTm = localtime(&t);
			if( pTm == 0 ){
				time(&t);
			}
		}else{
			time(&t);
		}
		pTm = localtime(&t);
		STRUCT_TM_TO_SYTM(pTm,&sTm);
	}
	/* Perform the requested operation */
	switch(zFormat[0]){
	case 'd':
		/* Day of the month */
		iVal = sTm.tm_mday;
		break;
	case 'h':
		/*	Hour (12 hour format)*/
		iVal = 1 + (sTm.tm_hour % 12);
		break;
	case 'H':
		/* Hour (24 hour format)*/
		iVal = sTm.tm_hour;
		break;
	case 'i':
		/*Minutes*/
		iVal = sTm.tm_min;
		break;
	case 'I':
		/*	returns 1 if DST is activated, 0 otherwise */
#ifdef __WINNT__
#ifdef _MSC_VER
#ifndef _WIN32_WCE
			_get_daylight(&sTm.tm_isdst);
#endif
#endif
#endif
		iVal = sTm.tm_isdst;
		break;
	case 'L':
		/* 	returns 1 for leap year, 0 otherwise */
		iVal = IS_LEAP_YEAR(sTm.tm_year);
		break;
	case 'm':
		/* Month number*/
		iVal = sTm.tm_mon;
		break;
	case 's':
		/*Seconds*/
		iVal = sTm.tm_sec;
		break;
	case 't':{
		/*Days in current month*/
		static const int aMonDays[] = {31,29,31,30,31,30,31,31,30,31,30,31 };
		int nDays = aMonDays[sTm.tm_mon % 12 ];
		if( sTm.tm_mon == 1 /* 'February' */ && !IS_LEAP_YEAR(sTm.tm_year) ){
			nDays = 28;
		}
		iVal = nDays;
		break;
			 }
	case 'U':
		/*Seconds since the Unix Epoch*/
		iVal = (ph7_int64)time(0);
		break;
	case 'w':
		/*	Day of the week (0 on Sunday) */
		iVal = sTm.tm_wday;
		break;
	case 'W': {
		/* ISO-8601 week number of year, weeks starting on Monday */
		static const int aISO8601[] = { 7 /* Sunday */,1 /* Monday */,2,3,4,5,6 };
		iVal = aISO8601[sTm.tm_wday % 7 ];
		break;
			  }
	case 'y':
		/* Year (2 digits) */
		iVal = sTm.tm_year % 100;
		break;
	case 'Y':
		/* Year (4 digits) */
		iVal = sTm.tm_year;
		break;
	case 'z':
		/* Day of the year */
		iVal = sTm.tm_yday;
		break;
	case 'Z':
		/*Timezone offset in seconds*/
		iVal = sTm.tm_gmtoff;
		break;
	default:
		/* unknown format,throw a warning */
		ph7_context_throw_error(pCtx,PH7_CTX_WARNING,"Unknown date format token");
		break;
	}
	/* Return the time value */
	ph7_result_int64(pCtx,iVal);
	return PH7_OK;
}
/*
 * int mktime/gmmktime([ int $hour = date("H") [, int $minute = date("i") [, int $second = date("s") 
 *  [, int $month = date("n") [, int $day = date("j") [, int $year = date("Y") [, int $is_dst = -1 ]]]]]]] )
 *  Returns the Unix timestamp corresponding to the arguments given. This timestamp is a 64bit integer 
 *  containing the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time
 *  specified.
 *  Arguments may be left out in order from right to left; any arguments thus omitted will be set to
 *  the current value according to the local date and time.
 * Parameters
 * $hour
 *  The number of the hour relevant to the start of the day determined by month, day and year.
 *  Negative values reference the hour before midnight of the day in question. Values greater
 *  than 23 reference the appropriate hour in the following day(s).
 * $minute
 *  The number of the minute relevant to the start of the hour. Negative values reference
 *  the minute in the previous hour. Values greater than 59 reference the appropriate minute
 *  in the following hour(s).
 * $second
 *  The number of seconds relevant to the start of the minute. Negative values reference 
 *  the second in the previous minute. Values greater than 59 reference the appropriate 
 * second in the following minute(s).
 * $month
 *  The number of the month relevant to the end of the previous year. Values 1 to 12 reference
 *  the normal calendar months of the year in question. Values less than 1 (including negative values)
 *  reference the months in the previous year in reverse order, so 0 is December, -1 is November)...
 * $day
 *  The number of the day relevant to the end of the previous month. Values 1 to 28, 29, 30 or 31 
 *  (depending upon the month) reference the normal days in the relevant month. Values less than 1
 *  (including negative values) reference the days in the previous month, so 0 is the last day 
 *  of the previous month, -1 is the day before that, etc. Values greater than the number of days
 *  in the relevant month reference the appropriate day in the following month(s).
 * $year
 *  The number of the year, may be a two or four digit value, with values between 0-69 mapping
 *  to 2000-2069 and 70-100 to 1970-2000. On systems where time_t is a 32bit signed integer, as 
 *  most common today, the valid range for year is somewhere between 1901 and 2038.
 * $is_dst
 *  This parameter can be set to 1 if the time is during daylight savings time (DST), 0 if it is not,
 *  or -1 (the default) if it is unknown whether the time is within daylight savings time or not. 
 * Return
 *   mktime() returns the Unix timestamp of the arguments given. 
 *   If the arguments are invalid, the function returns FALSE
 */
static int PH7_builtin_mktime(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zFunction;
	ph7_int64 iVal = 0;
	struct tm *pTm;
	time_t t;
	/* Extract function name */
	zFunction = ph7_function_name(pCtx);
	/* Get the current time */
	time(&t);
	if( zFunction[0] == 'g' /* gmmktime */ ){
		pTm = gmtime(&t);
	}else{
		/* localtime */
		pTm = localtime(&t);
	}
	if( nArg > 0 ){
		int iVal;
		/* Hour */
		iVal = ph7_value_to_int(apArg[0]);
		pTm->tm_hour = iVal;
		if( nArg > 1 ){
			/* Minutes */
			iVal = ph7_value_to_int(apArg[1]);
			pTm->tm_min = iVal;
			if( nArg > 2 ){
				/* Seconds */
				iVal = ph7_value_to_int(apArg[2]);
				pTm->tm_sec = iVal;
				if( nArg > 3 ){
					/* Month */
					iVal = ph7_value_to_int(apArg[3]);
					pTm->tm_mon = iVal - 1;
					if( nArg > 4 ){
						/* mday */
						iVal = ph7_value_to_int(apArg[4]);
						pTm->tm_mday = iVal;
						if( nArg > 5 ){
							/* Year */
							iVal = ph7_value_to_int(apArg[5]);
							if( iVal > 1900 ){
								iVal -= 1900;
							}
							pTm->tm_year = iVal;
							if( nArg > 6 ){
								/* is_dst */
								iVal = ph7_value_to_bool(apArg[6]);
								pTm->tm_isdst = iVal;
							}
						}
					}
				}
			}
		}
	}
	/* Make the time */
	iVal = (ph7_int64)mktime(pTm);
	/* Return the timesatmp as a 64bit integer */
	ph7_result_int64(pCtx,iVal);
	return PH7_OK;
}
/*
 * Section:
 *    URL handling Functions.
 * Authors:
 *    Symisc Systems,devel@symisc.net.
 *    Copyright (C) Symisc Systems,http://ph7.symisc.net
 * Status:
 *    Stable.
 */
/*
 * Output consumer callback for the standard Symisc routines.
 * [i.e: SyBase64Encode(),SyBase64Decode(),SyUriEncode(),...].
 */
static int Consumer(const void *pData,unsigned int nLen,void *pUserData)
{
	/* Store in the call context result buffer */
	ph7_result_string((ph7_context *)pUserData,(const char *)pData,(int)nLen);
	return SXRET_OK;
}
/*
 * string base64_encode(string $data)
 * string convert_uuencode(string $data)  
 *  Encodes data with MIME base64
 * Parameter
 *  $data
 *    Data to encode
 * Return
 *  Encoded data or FALSE on failure.
 */
static int PH7_builtin_base64_encode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the input string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the BASE64 encoding */
	SyBase64Encode(zIn,(sxu32)nLen,Consumer,pCtx);
	return PH7_OK;
}
/*
 * string base64_decode(string $data)
 * string convert_uudecode(string $data)
 *  Decodes data encoded with MIME base64
 * Parameter
 *  $data
 *    Encoded data.
 * Return
 *  Returns the original data or FALSE on failure.
 */
static int PH7_builtin_base64_decode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the input string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the BASE64 decoding */
	SyBase64Decode(zIn,(sxu32)nLen,Consumer,pCtx);
	return PH7_OK;
}
/*
 * string urlencode(string $str)
 *  URL encoding
 * Parameter
 *  $data
 *   Input string.
 * Return
 *  Returns a string in which all non-alphanumeric characters except -_. have
 *  been replaced with a percent (%) sign followed by two hex digits and spaces
 *  encoded as plus (+) signs.
 */
static int PH7_builtin_urlencode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the input string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the URL encoding */
	SyUriEncode(zIn,(sxu32)nLen,Consumer,pCtx);
	return PH7_OK;
}
/*
 * string urldecode(string $str)
 *  Decodes any %## encoding in the given string.
 *  Plus symbols ('+') are decoded to a space character. 
 * Parameter
 *  $data
 *    Input string.
 * Return
 *  Decoded URL or FALSE on failure.
 */
static int PH7_builtin_urldecode(ph7_context *pCtx,int nArg,ph7_value **apArg)
{
	const char *zIn;
	int nLen;
	if( nArg < 1 ){
		/* Missing arguments,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Extract the input string */
	zIn = ph7_value_to_string(apArg[0],&nLen);
	if( nLen < 1 ){
		/* Nothing to process,return FALSE */
		ph7_result_bool(pCtx,0);
		return PH7_OK;
	}
	/* Perform the URL decoding */
	SyUriDecode(zIn,(sxu32)nLen,Consumer,pCtx,TRUE);
	return PH7_OK;
}
#endif /* PH7_DISABLE_BUILTIN_FUNC */
/* Table of the built-in functions */
static const ph7_builtin_func aBuiltInFunc[] = {
	   /* Variable handling functions */
	{ "is_bool"    , PH7_builtin_is_bool     },
	{ "is_float"   , PH7_builtin_is_float    },
	{ "is_real"    , PH7_builtin_is_float    },
	{ "is_double"  , PH7_builtin_is_float    },
	{ "is_int"     , PH7_builtin_is_int      },
	{ "is_integer" , PH7_builtin_is_int      },
	{ "is_long"    , PH7_builtin_is_int      },
	{ "is_string"  , PH7_builtin_is_string   },
	{ "is_null"    , PH7_builtin_is_null     },
	{ "is_numeric" , PH7_builtin_is_numeric  },
	{ "is_scalar"  , PH7_builtin_is_scalar   },
	{ "is_array"   , PH7_builtin_is_array    },
	{ "is_object"  , PH7_builtin_is_object   },
	{ "is_resource", PH7_builtin_is_resource },
	{ "douleval"   , PH7_builtin_floatval    },
	{ "floatval"   , PH7_builtin_floatval    },
	{ "intval"     , PH7_builtin_intval      },
	{ "strval"     , PH7_builtin_strval      },
	{ "empty"      , PH7_builtin_empty       },
#ifndef PH7_DISABLE_BUILTIN_FUNC
#ifdef PH7_ENABLE_MATH_FUNC
	   /* Math functions */
	{ "abs"  ,    PH7_builtin_abs          },
	{ "sqrt" ,    PH7_builtin_sqrt         },
	{ "exp"  ,    PH7_builtin_exp          },
	{ "floor",    PH7_builtin_floor        },
	{ "cos"  ,    PH7_builtin_cos          },
	{ "sin"  ,    PH7_builtin_sin          },
	{ "acos" ,    PH7_builtin_acos         },
	{ "asin" ,    PH7_builtin_asin         },
	{ "cosh" ,    PH7_builtin_cosh         },
	{ "sinh" ,    PH7_builtin_sinh         },
	{ "ceil" ,    PH7_builtin_ceil         },
	{ "tan"  ,    PH7_builtin_tan          },
	{ "tanh" ,    PH7_builtin_tanh         },
	{ "atan" ,    PH7_builtin_atan         },
	{ "atan2",    PH7_builtin_atan2        },
	{ "log"  ,    PH7_builtin_log          },
	{ "log10" ,   PH7_builtin_log10        },
	{ "pow"  ,    PH7_builtin_pow          },
	{ "pi",       PH7_builtin_pi           },
	{ "fmod",     PH7_builtin_fmod         },
	{ "hypot",    PH7_builtin_hypot        },
#endif /* PH7_ENABLE_MATH_FUNC */
	{ "round",    PH7_builtin_round        },
	{ "dechex", PH7_builtin_dechex         },
	{ "decoct", PH7_builtin_decoct         },
	{ "decbin", PH7_builtin_decbin         },
	{ "hexdec", PH7_builtin_hexdec         },
	{ "bindec", PH7_builtin_bindec         },
	{ "octdec", PH7_builtin_octdec         },
	{ "srand",  PH7_builtin_srand          },
	{ "mt_srand",PH7_builtin_srand         },
	{ "base_convert", PH7_builtin_base_convert },
	   /* String handling functions */
	{ "substr",          PH7_builtin_substr     },
	{ "substr_compare",  PH7_builtin_substr_compare },
	{ "substr_count",    PH7_builtin_substr_count },
	{ "chunk_split",     PH7_builtin_chunk_split},
	{ "addslashes" ,     PH7_builtin_addslashes },
	{ "addcslashes",     PH7_builtin_addcslashes},
	{ "quotemeta",       PH7_builtin_quotemeta  },
	{ "stripslashes",    PH7_builtin_stripslashes },
	{ "htmlspecialchars",PH7_builtin_htmlspecialchars },
	{ "htmlspecialchars_decode", PH7_builtin_htmlspecialchars_decode },
	{ "get_html_translation_table",PH7_builtin_get_html_translation_table },
	{ "htmlentities",PH7_builtin_htmlentities},
	{ "html_entity_decode", PH7_builtin_html_entity_decode},
	{ "strlen"     , PH7_builtin_strlen     },
	{ "strcmp"     , PH7_builtin_strcmp     },
	{ "strcoll"    , PH7_builtin_strcmp     },
	{ "strncmp"    , PH7_builtin_strncmp    },
	{ "strcasecmp" , PH7_builtin_strcasecmp },
	{ "strncasecmp", PH7_builtin_strncasecmp},
	{ "implode"    , PH7_builtin_implode    },
	{ "join"       , PH7_builtin_implode    },
	{ "implode_recursive" , PH7_builtin_implode_recursive },
	{ "join_recursive"    , PH7_builtin_implode_recursive },
	{ "explode"     , PH7_builtin_explode    },
	{ "trim"        , PH7_builtin_trim       },
	{ "rtrim"       , PH7_builtin_rtrim      },
	{ "chop"        , PH7_builtin_rtrim      },
	{ "ltrim"       , PH7_builtin_ltrim      },
	{ "strtolower",   PH7_builtin_strtolower },
	{ "mb_strtolower",PH7_builtin_strtolower }, /* Only UTF-8 encoding is supported */
	{ "strtoupper",   PH7_builtin_strtoupper },
	{ "mb_strtoupper",PH7_builtin_strtoupper }, /* Only UTF-8 encoding is supported */
	{ "ucfirst",      PH7_builtin_ucfirst    },
	{ "lcfirst",      PH7_builtin_lcfirst    },
	{ "ord",          PH7_builtin_ord        },
	{ "chr",          PH7_builtin_chr        },
	{ "bin2hex",      PH7_builtin_bin2hex    },
	{ "strstr",       PH7_builtin_strstr     },
	{ "stristr",      PH7_builtin_stristr    },
	{ "strchr",       PH7_builtin_strstr     },
	{ "strpos",       PH7_builtin_strpos     },
	{ "stripos",      PH7_builtin_stripos    },
	{ "strrpos",      PH7_builtin_strrpos    },
	{ "strripos",     PH7_builtin_strripos   },
	{ "strrchr",      PH7_builtin_strrchr    },
	{ "strrev",       PH7_builtin_strrev     },
	{ "ucwords",      PH7_builtin_ucwords    },
	{ "str_repeat",   PH7_builtin_str_repeat },
	{ "nl2br",        PH7_builtin_nl2br      },
	{ "sprintf",      PH7_builtin_sprintf    },
	{ "printf",       PH7_builtin_printf     },
	{ "vprintf",      PH7_builtin_vprintf    },
	{ "vsprintf",     PH7_builtin_vsprintf   },
	{ "size_format",  PH7_builtin_size_format},
#if !defined(PH7_DISABLE_HASH_FUNC)
	{ "md5",          PH7_builtin_md5       },
	{ "sha1",         PH7_builtin_sha1      },
	{ "crc32",        PH7_builtin_crc32     },
#endif /* PH7_DISABLE_HASH_FUNC */
	{ "str_getcsv",   PH7_builtin_str_getcsv },
	{ "strip_tags",   PH7_builtin_strip_tags },
	{ "str_shuffle",  PH7_builtin_str_shuffle},
	{ "str_split",    PH7_builtin_str_split  },
	{ "strspn",       PH7_builtin_strspn     },
	{ "strcspn",      PH7_builtin_strcspn    },
	{ "strpbrk",      PH7_builtin_strpbrk    },
	{ "soundex",      PH7_builtin_soundex    },
	{ "wordwrap",     PH7_builtin_wordwrap   },
	{ "strtok",       PH7_builtin_strtok     },
	{ "str_pad",      PH7_builtin_str_pad    },
	{ "str_replace",  PH7_builtin_str_replace},
	{ "str_ireplace", PH7_builtin_str_replace},
	{ "strtr",        PH7_builtin_strtr      },
	{ "parse_ini_string", PH7_builtin_parse_ini_string},
	         /* Ctype functions */
	{ "ctype_alnum", PH7_builtin_ctype_alnum },
	{ "ctype_alpha", PH7_builtin_ctype_alpha },
	{ "ctype_cntrl", PH7_builtin_ctype_cntrl },
	{ "ctype_digit", PH7_builtin_ctype_digit },
	{ "ctype_xdigit",PH7_builtin_ctype_xdigit}, 
	{ "ctype_graph", PH7_builtin_ctype_graph },
	{ "ctype_print", PH7_builtin_ctype_print },
	{ "ctype_punct", PH7_builtin_ctype_punct },
	{ "ctype_space", PH7_builtin_ctype_space },
	{ "ctype_lower", PH7_builtin_ctype_lower },
	{ "ctype_upper", PH7_builtin_ctype_upper },
	         /* Time functions */
	{ "time"    ,    PH7_builtin_time         },
	{ "microtime",   PH7_builtin_microtime    },
	{ "getdate" ,    PH7_builtin_getdate      },
	{ "gettimeofday",PH7_builtin_gettimeofday },
	{ "date",        PH7_builtin_date         },
	{ "strftime",    PH7_builtin_strftime     },
	{ "idate",       PH7_builtin_idate        },
	{ "gmdate",      PH7_builtin_gmdate       },
	{ "localtime",   PH7_builtin_localtime    },
	{ "mktime",      PH7_builtin_mktime       },
	{ "gmmktime",    PH7_builtin_mktime       },
	        /* URL functions */
	{ "base64_encode",PH7_builtin_base64_encode },
	{ "base64_decode",PH7_builtin_base64_decode },
	{ "convert_uuencode",PH7_builtin_base64_encode },
	{ "convert_uudecode",PH7_builtin_base64_decode },
	{ "urlencode",    PH7_builtin_urlencode },
	{ "urldecode",    PH7_builtin_urldecode },
	{ "rawurlencode", PH7_builtin_urlencode },
	{ "rawurldecode", PH7_builtin_urldecode },
#endif /* PH7_DISABLE_BUILTIN_FUNC */
};
/*
 * Register the built-in functions defined above,the array functions 
 * defined in hashmap.c and the IO functions defined in vfs.c.
 */
PH7_PRIVATE void PH7_RegisterBuiltInFunction(ph7_vm *pVm)
{
	sxu32 n;
	for( n = 0 ; n < SX_ARRAYSIZE(aBuiltInFunc) ; ++n ){
		ph7_create_function(&(*pVm),aBuiltInFunc[n].zName,aBuiltInFunc[n].xFunc,0);
	}
	/* Register hashmap functions [i.e: array_merge(),sort(),count(),array_diff(),...] */
	PH7_RegisterHashmapFunctions(&(*pVm));
	/* Register IO functions [i.e: fread(),fwrite(),chdir(),mkdir(),file(),...] */
	PH7_RegisterIORoutine(&(*pVm));
}

/*
 * ----------------------------------------------------------
 * File: api.c
 * MD5: ec37aefad456de49a24c8f73f45f8c84
 * ----------------------------------------------------------
 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012, Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
 /* $SymiscID: api.c v2.0 FreeBSD 2012-08-18 06:54 stable <chm@symisc.net> $ */
#ifndef PH7_AMALGAMATION
#include "ph7int.h"
#endif
/* This file implement the public interfaces presented to host-applications.
 * Routines in other files are for internal use by PH7 and should not be
 * accessed by users of the library.
 */
#define PH7_ENGINE_MAGIC 0xF874BCD7
#define PH7_ENGINE_MISUSE(ENGINE) (ENGINE == 0 || ENGINE->nMagic != PH7_ENGINE_MAGIC)
#define PH7_VM_MISUSE(VM) (VM == 0 || VM->nMagic == PH7_VM_STALE)
/* If another thread have released a working instance,the following macros
 * evaluates to true. These macros are only used when the library
 * is built with threading support enabled which is not the case in
 * the default built.
 */
#define PH7_THRD_ENGINE_RELEASE(ENGINE) (ENGINE->nMagic != PH7_ENGINE_MAGIC)
#define PH7_THRD_VM_RELEASE(VM) (VM->nMagic == PH7_VM_STALE)
/* IMPLEMENTATION: ph7@embedded@symisc 311-12-32 */
/*
 * All global variables are collected in the structure named "sMPGlobal".
 * That way it is clear in the code when we are using static variable because
 * its name start with sMPGlobal.
 */
static struct Global_Data
{
	SyMemBackend sAllocator;                /* Global low level memory allocator */
#if defined(PH7_ENABLE_THREADS)
	const SyMutexMethods *pMutexMethods;   /* Mutex methods */
	SyMutex *pMutex;                       /* Global mutex */
	sxu32 nThreadingLevel;                 /* Threading level: 0 == Single threaded/1 == Multi-Threaded 
										    * The threading level can be set using the [ph7_lib_config()]
											* interface with a configuration verb set to
											* PH7_LIB_CONFIG_THREAD_LEVEL_SINGLE or 
											* PH7_LIB_CONFIG_THREAD_LEVEL_MULTI
											*/
#endif
	const ph7_vfs *pVfs;                    /* Underlying virtual file system */
	sxi32 nEngine;                          /* Total number of active engines */
	ph7 *pEngines;                          /* List of active engine */
	sxu32 nMagic;                           /* Sanity check against library misuse */
}sMPGlobal = {
	{0,0,0,0,0,0,0,0,{0}},
#if defined(PH7_ENABLE_THREADS)
	0,
	0,
	0,
#endif
	0,
	0,
	0,
	0
};
#define PH7_LIB_MAGIC  0xEA1495BA
#define PH7_LIB_MISUSE (sMPGlobal.nMagic != PH7_LIB_MAGIC)
/*
 * Supported threading level.
 * These options have meaning only when the library is compiled with multi-threading
 * support.That is,the PH7_ENABLE_THREADS compile time directive must be defined
 * when PH7 is built.
 * PH7_THREAD_LEVEL_SINGLE:
 * In this mode,mutexing is disabled and the library can only be used by a single thread.
 * PH7_THREAD_LEVEL_MULTI
 * In this mode, all mutexes including the recursive mutexes on [ph7] objects
 * are enabled so that the application is free to share the same engine
 * between different threads at the same time.
 */
#define PH7_THREAD_LEVEL_SINGLE 1 
#define PH7_THREAD_LEVEL_MULTI  2
/*
 * Configure a running PH7 engine instance.
 * return PH7_OK on success.Any other return
 * value indicates failure.
 * Refer to [ph7_config()].
 */
static sxi32 EngineConfig(ph7 *pEngine,sxi32 nOp,va_list ap)
{
	ph7_conf *pConf = &pEngine->xConf;
	int rc = PH7_OK;
	/* Perform the requested operation */
	switch(nOp){									 
	case PH7_CONFIG_ERR_OUTPUT: {
		ProcConsumer xConsumer = va_arg(ap,ProcConsumer);
		void *pUserData = va_arg(ap,void *);
		/* Compile time error consumer routine */
		if( xConsumer == 0 ){
			rc = PH7_CORRUPT;
			break;
		}
		/* Install the error consumer */
		pConf->xErr     = xConsumer;
		pConf->pErrData = pUserData;
		break;
									 }
	case PH7_CONFIG_ERR_LOG:{
		/* Extract compile-time error log if any */
		const char **pzPtr = va_arg(ap,const char **);
		int *pLen = va_arg(ap,int *);
		if( pzPtr == 0 ){
			rc = PH7_CORRUPT;
			break;
		}
		/* NULL terminate the error-log buffer */
		SyBlobNullAppend(&pConf->sErrConsumer);
		/* Point to the error-log buffer */
		*pzPtr = (const char *)SyBlobData(&pConf->sErrConsumer);
		if( pLen ){
			if( SyBlobLength(&pConf->sErrConsumer) > 1 /* NULL '\0' terminator */ ){
				*pLen = (int)SyBlobLength(&pConf->sErrConsumer);
			}else{
				*pLen = 0;
			}
		}
		break;
							}
	case PH7_CONFIG_ERR_ABORT:
		/* Reserved for future use */
		break;
	default:
		/* Unknown configuration verb */
		rc = PH7_CORRUPT;
		break;
	} /* Switch() */
	return rc;
}
/*
 * Configure the PH7 library.
 * return PH7_OK on success.Any other return value
 * indicates failure.
 * Refer to [ph7_lib_config()].
 */
static sxi32 PH7CoreConfigure(sxi32 nOp,va_list ap)
{
	int rc = PH7_OK;
	switch(nOp){
	    case PH7_LIB_CONFIG_VFS:{
			/* Install a virtual file system */
			const ph7_vfs *pVfs = va_arg(ap,const ph7_vfs *);
			sMPGlobal.pVfs = pVfs;
			break;
								}
		case PH7_LIB_CONFIG_USER_MALLOC: {
			/* Use an alternative low-level memory allocation routines */
			const SyMemMethods *pMethods = va_arg(ap,const SyMemMethods *);
			/* Save the memory failure callback (if available) */
			ProcMemError xMemErr = sMPGlobal.sAllocator.xMemError;
			void *pMemErr = sMPGlobal.sAllocator.pUserData;
			if( pMethods == 0 ){
				/* Use the built-in memory allocation subsystem */
				rc = SyMemBackendInit(&sMPGlobal.sAllocator,xMemErr,pMemErr);
			}else{
				rc = SyMemBackendInitFromOthers(&sMPGlobal.sAllocator,pMethods,xMemErr,pMemErr);
			}
			break;
										  }
		case PH7_LIB_CONFIG_MEM_ERR_CALLBACK: {
			/* Memory failure callback */
			ProcMemError xMemErr = va_arg(ap,ProcMemError);
			void *pUserData = va_arg(ap,void *);
			sMPGlobal.sAllocator.xMemError = xMemErr;
			sMPGlobal.sAllocator.pUserData = pUserData;
			break;
												 }	  
		case PH7_LIB_CONFIG_USER_MUTEX: {
#if defined(PH7_ENABLE_THREADS)
			/* Use an alternative low-level mutex subsystem */
			const SyMutexMethods *pMethods = va_arg(ap,const SyMutexMethods *);
#if defined (UNTRUST)
			if( pMethods == 0 ){
				rc = PH7_CORRUPT;
			}
#endif
			/* Sanity check */
			if( pMethods->xEnter == 0 || pMethods->xLeave == 0 || pMethods->xNew == 0){
				/* At least three criticial callbacks xEnter(),xLeave() and xNew() must be supplied */
				rc = PH7_CORRUPT;
				break;
			}
			if( sMPGlobal.pMutexMethods ){
				/* Overwrite the previous mutex subsystem */
				SyMutexRelease(sMPGlobal.pMutexMethods,sMPGlobal.pMutex);
				if( sMPGlobal.pMutexMethods->xGlobalRelease ){
					sMPGlobal.pMutexMethods->xGlobalRelease();
				}
				sMPGlobal.pMutex = 0;
			}
			/* Initialize and install the new mutex subsystem */
			if( pMethods->xGlobalInit ){
				rc = pMethods->xGlobalInit();
				if ( rc != PH7_OK ){
					break;
				}
			}
			/* Create the global mutex */
			sMPGlobal.pMutex = pMethods->xNew(SXMUTEX_TYPE_FAST);
			if( sMPGlobal.pMutex == 0 ){
				/*
				 * If the supplied mutex subsystem is so sick that we are unable to
				 * create a single mutex,there is no much we can do here.
				 */
				if( pMethods->xGlobalRelease ){
					pMethods->xGlobalRelease();
				}
				rc = PH7_CORRUPT;
				break;
			}
			sMPGlobal.pMutexMethods = pMethods;			
			if( sMPGlobal.nThreadingLevel == 0 ){
				/* Set a default threading level */
				sMPGlobal.nThreadingLevel = PH7_THREAD_LEVEL_MULTI; 
			}
#endif
			break;
										   }
		case PH7_LIB_CONFIG_THREAD_LEVEL_SINGLE:
#if defined(PH7_ENABLE_THREADS)
			/* Single thread mode(Only one thread is allowed to play with the library) */
			sMPGlobal.nThreadingLevel = PH7_THREAD_LEVEL_SINGLE;
#endif
			break;
		case PH7_LIB_CONFIG_THREAD_LEVEL_MULTI:
#if defined(PH7_ENABLE_THREADS)
			/* Multi-threading mode (library is thread safe and PH7 engines and virtual machines
			 * may be shared between multiple threads).
			 */
			sMPGlobal.nThreadingLevel = PH7_THREAD_LEVEL_MULTI;
#endif
			break;
		default:
			/* Unknown configuration option */
			rc = PH7_CORRUPT;
			break;
	}
	return rc;
}
/*
 * [CAPIREF: ph7_lib_config()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_lib_config(int nConfigOp,...)
{
	va_list ap;
	int rc;

	if( sMPGlobal.nMagic == PH7_LIB_MAGIC ){
		/* Library is already initialized,this operation is forbidden */
		return PH7_LOOKED;
	}
	va_start(ap,nConfigOp);
	rc = PH7CoreConfigure(nConfigOp,ap);
	va_end(ap);
	return rc;
}
/*
 * Global library initialization
 * Refer to [ph7_lib_init()]
 * This routine must be called to initialize the memory allocation subsystem,the mutex 
 * subsystem prior to doing any serious work with the library.The first thread to call
 * this routine does the initialization process and set the magic number so no body later
 * can re-initialize the library.If subsequent threads call this  routine before the first
 * thread have finished the initialization process, then the subsequent threads must block 
 * until the initialization process is done.
 */
static sxi32 PH7CoreInitialize(void)
{
	const ph7_vfs *pVfs; /* Built-in vfs */
#if defined(PH7_ENABLE_THREADS)
	const SyMutexMethods *pMutexMethods = 0;
	SyMutex *pMaster = 0;
#endif
	int rc;
	/*
	 * If the library is already initialized,then a call to this routine
	 * is a no-op.
	 */
	if( sMPGlobal.nMagic == PH7_LIB_MAGIC ){
		return PH7_OK; /* Already initialized */
	}
	/* Point to the built-in vfs */
	pVfs = PH7_ExportBuiltinVfs();
	/* Install it */
	ph7_lib_config(PH7_LIB_CONFIG_VFS,pVfs);
#if defined(PH7_ENABLE_THREADS)
	if( sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_SINGLE ){
		pMutexMethods = sMPGlobal.pMutexMethods;
		if( pMutexMethods == 0 ){
			/* Use the built-in mutex subsystem */
			pMutexMethods = SyMutexExportMethods();
			if( pMutexMethods == 0 ){
				return PH7_CORRUPT; /* Can't happen */
			}
			/* Install the mutex subsystem */
			rc = ph7_lib_config(PH7_LIB_CONFIG_USER_MUTEX,pMutexMethods);
			if( rc != PH7_OK ){
				return rc;
			}
		}
		/* Obtain a static mutex so we can initialize the library without calling malloc() */
		pMaster = SyMutexNew(pMutexMethods,SXMUTEX_TYPE_STATIC_1);
		if( pMaster == 0 ){
			return PH7_CORRUPT; /* Can't happen */
		}
	}
	/* Lock the master mutex */
	rc = PH7_OK;
	SyMutexEnter(pMutexMethods,pMaster); /* NO-OP if sMPGlobal.nThreadingLevel == PH7_THREAD_LEVEL_SINGLE */
	if( sMPGlobal.nMagic != PH7_LIB_MAGIC ){
#endif
		if( sMPGlobal.sAllocator.pMethods == 0 ){
			/* Install a memory subsystem */
			rc = ph7_lib_config(PH7_LIB_CONFIG_USER_MALLOC,0); /* zero mean use the built-in memory backend */
			if( rc != PH7_OK ){
				/* If we are unable to initialize the memory backend,there is no much we can do here.*/
				goto End;
			}
		}
#if defined(PH7_ENABLE_THREADS)
		if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE ){
			/* Protect the memory allocation subsystem */
			rc = SyMemBackendMakeThreadSafe(&sMPGlobal.sAllocator,sMPGlobal.pMutexMethods);
			if( rc != PH7_OK ){
				goto End;
			}
		}
#endif
		/* Our library is initialized,set the magic number */
		sMPGlobal.nMagic = PH7_LIB_MAGIC;
		rc = PH7_OK;
#if defined(PH7_ENABLE_THREADS)
	} /* sMPGlobal.nMagic != PH7_LIB_MAGIC */
#endif
End:
#if defined(PH7_ENABLE_THREADS)
	/* Unlock the master mutex */
	SyMutexLeave(pMutexMethods,pMaster); /* NO-OP if sMPGlobal.nThreadingLevel == PH7_THREAD_LEVEL_SINGLE */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_lib_init()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_lib_init(void)
{
	int rc;
	rc = PH7CoreInitialize();
	return rc;
}
/*
 * Release an active PH7 engine and it's associated active virtual machines.
 */
static sxi32 EngineRelease(ph7 *pEngine)
{
	ph7_vm *pVm,*pNext;
	/* Release all active VM */
	pVm = pEngine->pVms;
	for(;;){
		if( pEngine->iVm <= 0 ){
			break;
		}
		pNext = pVm->pNext;
		PH7_VmRelease(pVm);
		pVm = pNext;
		pEngine->iVm--;
	}
	/* Set a dummy magic number */
	pEngine->nMagic = 0x7635;
	/* Release the private memory subsystem */
	SyMemBackendRelease(&pEngine->sAllocator); 
	return PH7_OK;
}
/*
 * Release all resources consumed by the library.
 * If PH7 is already shut down when this routine
 * is invoked then this routine is a harmless no-op.
 * Note: This call is not thread safe.
 * Refer to [ph7_lib_shutdown()].
 */
static void PH7CoreShutdown(void)
{
	ph7 *pEngine,*pNext;
	/* Release all active engines first */
	pEngine = sMPGlobal.pEngines;
	for(;;){
		if( sMPGlobal.nEngine < 1 ){
			break;
		}
		pNext = pEngine->pNext;
		EngineRelease(pEngine); 
		pEngine = pNext;
		sMPGlobal.nEngine--;
	}
#if defined(PH7_ENABLE_THREADS)
	/* Release the mutex subsystem */
	if( sMPGlobal.pMutexMethods ){
		if( sMPGlobal.pMutex ){
			SyMutexRelease(sMPGlobal.pMutexMethods,sMPGlobal.pMutex);
			sMPGlobal.pMutex = 0;
		}
		if( sMPGlobal.pMutexMethods->xGlobalRelease ){
			sMPGlobal.pMutexMethods->xGlobalRelease();
		}
		sMPGlobal.pMutexMethods = 0;
	}
	sMPGlobal.nThreadingLevel = 0;
#endif
	if( sMPGlobal.sAllocator.pMethods ){
		/* Release the memory backend */
		SyMemBackendRelease(&sMPGlobal.sAllocator);
	}
	sMPGlobal.nMagic = 0x1928;	
}
/*
 * [CAPIREF: ph7_lib_shutdown()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_lib_shutdown(void)
{
	if( sMPGlobal.nMagic != PH7_LIB_MAGIC ){
		/* Already shut */
		return PH7_OK;
	}
	PH7CoreShutdown();
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_lib_is_threadsafe()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_lib_is_threadsafe(void)
{
	if( sMPGlobal.nMagic != PH7_LIB_MAGIC ){
		return 0;
	}
#if defined(PH7_ENABLE_THREADS)
		if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE ){
			/* Muli-threading support is enabled */
			return 1;
		}else{
			/* Single-threading */
			return 0;
		}
#else
	return 0;
#endif
}
/*
 * [CAPIREF: ph7_lib_version()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_lib_version(void)
{
	return PH7_VERSION;
}
/*
 * [CAPIREF: ph7_lib_signature()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_lib_signature(void)
{
	return PH7_SIG;
}
/*
 * [CAPIREF: ph7_lib_ident()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_lib_ident(void)
{
	return PH7_IDENT;
}
/*
 * [CAPIREF: ph7_lib_copyright()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_lib_copyright(void)
{
	return PH7_COPYRIGHT;
}
/*
 * [CAPIREF: ph7_config()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_config(ph7 *pEngine,int nConfigOp,...)
{
	va_list ap;
	int rc;
	if( PH7_ENGINE_MISUSE(pEngine) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire engine mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_ENGINE_RELEASE(pEngine) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	 va_start(ap,nConfigOp);
	 rc = EngineConfig(&(*pEngine),nConfigOp,ap);
	 va_end(ap);
#if defined(PH7_ENABLE_THREADS)
	 /* Leave engine mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_init()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_init(ph7 **ppEngine)
{
	ph7 *pEngine;
	int rc;
#if defined(UNTRUST)
	if( ppEngine == 0 ){
		return PH7_CORRUPT;
	}
#endif
	*ppEngine = 0;
	/* One-time automatic library initialization */
	rc = PH7CoreInitialize();
	if( rc != PH7_OK ){
		return rc;
	}
	/* Allocate a new engine */
	pEngine = (ph7 *)SyMemBackendPoolAlloc(&sMPGlobal.sAllocator,sizeof(ph7));
	if( pEngine == 0 ){
		return PH7_NOMEM;
	}
	/* Zero the structure */
	SyZero(pEngine,sizeof(ph7));
	/* Initialize engine fields */
	pEngine->nMagic = PH7_ENGINE_MAGIC;
	rc = SyMemBackendInitFromParent(&pEngine->sAllocator,&sMPGlobal.sAllocator);
	if( rc != PH7_OK ){
		goto Release;
	}
#if defined(PH7_ENABLE_THREADS)
	SyMemBackendDisbaleMutexing(&pEngine->sAllocator);
#endif
	/* Default configuration */
	SyBlobInit(&pEngine->xConf.sErrConsumer,&pEngine->sAllocator);
	/* Install a default compile-time error consumer routine */
	ph7_config(pEngine,PH7_CONFIG_ERR_OUTPUT,PH7_VmBlobConsumer,&pEngine->xConf.sErrConsumer);
	/* Built-in vfs */
	pEngine->pVfs = sMPGlobal.pVfs;
#if defined(PH7_ENABLE_THREADS)
	if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE ){
		 /* Associate a recursive mutex with this instance */
		 pEngine->pMutex = SyMutexNew(sMPGlobal.pMutexMethods,SXMUTEX_TYPE_RECURSIVE);
		 if( pEngine->pMutex == 0 ){
			 rc = PH7_NOMEM;
			 goto Release;
		 }
	 }
#endif
	/* Link to the list of active engines */
#if defined(PH7_ENABLE_THREADS)
	/* Enter the global mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,sMPGlobal.pMutex); /* NO-OP if sMPGlobal.nThreadingLevel == PH7_THREAD_LEVEL_SINGLE */
#endif
	MACRO_LD_PUSH(sMPGlobal.pEngines,pEngine);
	sMPGlobal.nEngine++;
#if defined(PH7_ENABLE_THREADS)
	/* Leave the global mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,sMPGlobal.pMutex); /* NO-OP if sMPGlobal.nThreadingLevel == PH7_THREAD_LEVEL_SINGLE */
#endif
	/* Write a pointer to the new instance */
	*ppEngine = pEngine;
	return PH7_OK;
Release:
	SyMemBackendRelease(&pEngine->sAllocator);
	SyMemBackendPoolFree(&sMPGlobal.sAllocator,pEngine);
	return rc;
}
/*
 * [CAPIREF: ph7_release()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_release(ph7 *pEngine)
{
	int rc;
	if( PH7_ENGINE_MISUSE(pEngine) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire engine mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_ENGINE_RELEASE(pEngine) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Release the engine */
	rc = EngineRelease(&(*pEngine));
#if defined(PH7_ENABLE_THREADS)
	 /* Leave engine mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 /* Release engine mutex */
	 SyMutexRelease(sMPGlobal.pMutexMethods,pEngine->pMutex) /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
#if defined(PH7_ENABLE_THREADS)
	/* Enter the global mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,sMPGlobal.pMutex); /* NO-OP if sMPGlobal.nThreadingLevel == PH7_THREAD_LEVEL_SINGLE */
#endif
	/* Unlink from the list of active engines */
	MACRO_LD_REMOVE(sMPGlobal.pEngines,pEngine);
	sMPGlobal.nEngine--;
#if defined(PH7_ENABLE_THREADS)
	/* Leave the global mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,sMPGlobal.pMutex); /* NO-OP if sMPGlobal.nThreadingLevel == PH7_THREAD_LEVEL_SINGLE */
#endif
	/* Release the memory chunk allocated to this engine */
	SyMemBackendPoolFree(&sMPGlobal.sAllocator,pEngine);
	return rc;
}
/*
 * Compile a raw PHP script.
 * To execute a PHP code, it must first be compiled into a byte-code program using this routine.
 * If something goes wrong [i.e: compile-time error], your error log [i.e: error consumer callback]
 * should  display the appropriate error message and this function set ppVm to null and return
 * an error code that is different from PH7_OK. Otherwise when the script is successfully compiled
 * ppVm should hold the PH7 byte-code and it's safe to call [ph7_vm_exec(), ph7_vm_reset(), etc.].
 * This API does not actually evaluate the PHP code. It merely compile and prepares the PHP script
 * for evaluation.
 */
static sxi32 ProcessScript(
	ph7 *pEngine,          /* Running PH7 engine */
	ph7_vm **ppVm,         /* OUT: A pointer to the virtual machine */
	SyString *pScript,     /* Raw PHP script to compile */
	sxi32 iFlags,          /* Compile-time flags */
	const char *zFilePath  /* File path if script come from a file. NULL otherwise */
	)
{
	ph7_vm *pVm;
	int rc;
	/* Allocate a new virtual machine */
	pVm = (ph7_vm *)SyMemBackendPoolAlloc(&pEngine->sAllocator,sizeof(ph7_vm));
	if( pVm == 0 ){
		/* If the supplied memory subsystem is so sick that we are unable to allocate
		 * a tiny chunk of memory, there is no much we can do here. */
		if( ppVm ){
			*ppVm = 0;
		}
		return PH7_NOMEM;
	}
	if( iFlags < 0 ){
		/* Default compile-time flags */
		iFlags = 0;
	}
	/* Initialize the Virtual Machine */
	rc = PH7_VmInit(pVm,&(*pEngine));
	if( rc != PH7_OK ){
		SyMemBackendPoolFree(&pEngine->sAllocator,pVm);
		if( ppVm ){
			*ppVm = 0;
		}
		return PH7_VM_ERR;
	}
	if( zFilePath ){
		/* Push processed file path */
		PH7_VmPushFilePath(pVm,zFilePath,-1,TRUE,0);
	}
	/* Reset the error message consumer */
	SyBlobReset(&pEngine->xConf.sErrConsumer);
	/* Compile the script */
	PH7_CompileScript(pVm,&(*pScript),iFlags);
	if( pVm->sCodeGen.nErr > 0 || pVm == 0){
		sxu32 nErr = pVm->sCodeGen.nErr;
		/* Compilation error or null ppVm pointer,release this VM */
		SyMemBackendRelease(&pVm->sAllocator);
		SyMemBackendPoolFree(&pEngine->sAllocator,pVm);
		if( ppVm ){
			*ppVm = 0;
		}
		return nErr > 0 ? PH7_COMPILE_ERR : PH7_OK;
	}
	/* Prepare the virtual machine for bytecode execution */
	rc = PH7_VmMakeReady(pVm);
	if( rc != PH7_OK ){
		goto Release;
	}
	/* Install local import path which is the current directory */
	ph7_vm_config(pVm,PH7_VM_CONFIG_IMPORT_PATH,"./");
#if defined(PH7_ENABLE_THREADS)
	if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE ){
		 /* Associate a recursive mutex with this instance */
		 pVm->pMutex = SyMutexNew(sMPGlobal.pMutexMethods,SXMUTEX_TYPE_RECURSIVE);
		 if( pVm->pMutex == 0 ){
			 goto Release;
		 }
	 }
#endif
	/* Script successfully compiled,link to the list of active virtual machines */
	MACRO_LD_PUSH(pEngine->pVms,pVm);
	pEngine->iVm++;
	/* Point to the freshly created VM */
	*ppVm = pVm;
	/* Ready to execute PH7 bytecode */
	return PH7_OK;
Release:
	SyMemBackendRelease(&pVm->sAllocator);
	SyMemBackendPoolFree(&pEngine->sAllocator,pVm);
	*ppVm = 0;
	return PH7_VM_ERR;
}
/*
 * [CAPIREF: ph7_compile()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_compile(ph7 *pEngine,const char *zSource,int nLen,ph7_vm **ppOutVm)
{
	SyString sScript;
	int rc;
	if( PH7_ENGINE_MISUSE(pEngine) || zSource == 0){
		return PH7_CORRUPT;
	}
	if( nLen < 0 ){
		/* Compute input length automatically */
		nLen = (int)SyStrlen(zSource);
	}
	SyStringInitFromBuf(&sScript,zSource,nLen);
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire engine mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_ENGINE_RELEASE(pEngine) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Compile the script */
	rc = ProcessScript(&(*pEngine),ppOutVm,&sScript,0,0);
#if defined(PH7_ENABLE_THREADS)
	 /* Leave engine mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	/* Compilation result */
	return rc;
}
/*
 * [CAPIREF: ph7_compile_v2()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_compile_v2(ph7 *pEngine,const char *zSource,int nLen,ph7_vm **ppOutVm,int iFlags)
{
	SyString sScript;
	int rc;
	if( PH7_ENGINE_MISUSE(pEngine) || zSource == 0){
		return PH7_CORRUPT;
	}
	if( nLen < 0 ){
		/* Compute input length automatically */
		nLen = (int)SyStrlen(zSource);
	}
	SyStringInitFromBuf(&sScript,zSource,nLen);
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire engine mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_ENGINE_RELEASE(pEngine) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Compile the script */
	rc = ProcessScript(&(*pEngine),ppOutVm,&sScript,iFlags,0);
#if defined(PH7_ENABLE_THREADS)
	 /* Leave engine mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	/* Compilation result */
	return rc;
}
/*
 * [CAPIREF: ph7_compile_file()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_compile_file(ph7 *pEngine,const char *zFilePath,ph7_vm **ppOutVm,int iFlags)
{
	const ph7_vfs *pVfs;
	int rc;
	if( ppOutVm ){
		*ppOutVm = 0;
	}
	rc = PH7_OK; /* cc warning */
	if( PH7_ENGINE_MISUSE(pEngine) || SX_EMPTY_STR(zFilePath) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire engine mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_ENGINE_RELEASE(pEngine) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	 /*
	  * Check if the underlying vfs implement the memory map
	  * [i.e: mmap() under UNIX/MapViewOfFile() under windows] function.
	  */
	 pVfs = pEngine->pVfs;
	 if( pVfs == 0 || pVfs->xMmap == 0 ){
		 /* Memory map routine not implemented */
		 rc = PH7_IO_ERR;
	 }else{
		 void *pMapView = 0; /* cc warning */
		 ph7_int64 nSize = 0; /* cc warning */
		 SyString sScript;
		 /* Try to get a memory view of the whole file */
		 rc = pVfs->xMmap(zFilePath,&pMapView,&nSize);
		 if( rc != PH7_OK ){
			 /* Assume an IO error */
			 rc = PH7_IO_ERR;
		 }else{
			 /* Compile the file */
			 SyStringInitFromBuf(&sScript,pMapView,nSize);
			 rc = ProcessScript(&(*pEngine),ppOutVm,&sScript,iFlags,zFilePath);
			 /* Release the memory view of the whole file */
			 if( pVfs->xUnmap ){
				 pVfs->xUnmap(pMapView,nSize);
			 }
		 }
	 }
#if defined(PH7_ENABLE_THREADS)
	 /* Leave engine mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	/* Compilation result */
	return rc;
}
/*
 * [CAPIREF: ph7_vm_dump_v2()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_vm_dump_v2(ph7_vm *pVm,int (*xConsumer)(const void *,unsigned int,void *),void *pUserData)
{
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#ifdef UNTRUST
	if( xConsumer == 0 ){
		return PH7_CORRUPT;
	}
#endif
	/* Dump VM instructions */
	rc = PH7_VmDump(&(*pVm),xConsumer,pUserData);
	return rc;
}
/*
 * [CAPIREF: ph7_vm_config()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_vm_config(ph7_vm *pVm,int iConfigOp,...)
{
	va_list ap;
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Confiugure the virtual machine */
	va_start(ap,iConfigOp);
	rc = PH7_VmConfigure(&(*pVm),iConfigOp,ap);
	va_end(ap);
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_vm_exec()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_vm_exec(ph7_vm *pVm,int *pExitStatus)
{
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Execute PH7 byte-code */
	rc = PH7_VmByteCodeExec(&(*pVm));
	if( pExitStatus ){
		/* Exit status */
		*pExitStatus = pVm->iExitStatus;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	/* Execution result */
	return rc;
}
/*
 * [CAPIREF: ph7_vm_reset()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_vm_reset(ph7_vm *pVm)
{
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	rc = PH7_VmReset(&(*pVm));
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_vm_release()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_vm_release(ph7_vm *pVm)
{
	ph7 *pEngine;
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	pEngine = pVm->pEngine;
	rc = PH7_VmRelease(&(*pVm));
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	if( rc == PH7_OK ){
		/* Unlink from the list of active VM */
#if defined(PH7_ENABLE_THREADS)
			/* Acquire engine mutex */
			SyMutexEnter(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
			if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
				PH7_THRD_ENGINE_RELEASE(pEngine) ){
					return PH7_ABORT; /* Another thread have released this instance */
			}
#endif
		MACRO_LD_REMOVE(pEngine->pVms,pVm);
		pEngine->iVm--;
		/* Release the memory chunk allocated to this VM */
		SyMemBackendPoolFree(&pEngine->sAllocator,pVm);
#if defined(PH7_ENABLE_THREADS)
			/* Leave engine mutex */
			SyMutexLeave(sMPGlobal.pMutexMethods,pEngine->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif	
	}
	return rc;
}
/*
 * [CAPIREF: ph7_create_function()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_create_function(ph7_vm *pVm,const char *zName,int (*xFunc)(ph7_context *,int,ph7_value **),void *pUserData)
{
	SyString sName;
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
	SyStringInitFromBuf(&sName,zName,SyStrlen(zName));
	/* Remove leading and trailing white spaces */
	SyStringFullTrim(&sName);
	/* Ticket 1433-003: NULL values are not allowed */
	if( sName.nByte < 1 || xFunc == 0 ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Install the foreign function */
	rc = PH7_VmInstallForeignFunction(&(*pVm),&sName,xFunc,pUserData); 
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_delete_function()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_delete_function(ph7_vm *pVm,const char *zName)
{
	ph7_user_func *pFunc = 0;
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Perform the deletion */
	rc = SyHashDeleteEntry(&pVm->hHostFunction,(const void *)zName,SyStrlen(zName),(void **)&pFunc);
	if( rc == PH7_OK ){
		/* Release internal fields */
		SySetRelease(&pFunc->aAux);
		SyMemBackendFree(&pVm->sAllocator,(void *)SyStringData(&pFunc->sName));
		SyMemBackendPoolFree(&pVm->sAllocator,pFunc);
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_create_constant()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_create_constant(ph7_vm *pVm,const char *zName,void (*xExpand)(ph7_value *,void *),void *pUserData)
{
	SyString sName;
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
	SyStringInitFromBuf(&sName,zName,SyStrlen(zName));
	/* Remove leading and trailing white spaces */
	SyStringFullTrim(&sName);
	if( sName.nByte < 1 ){
		/* Empty constant name */
		return PH7_CORRUPT;
	}
	/* TICKET 1433-003: NULL pointer harmless operation */
	if( xExpand == 0 ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	/* Perform the registration */
	rc = PH7_VmRegisterConstant(&(*pVm),&sName,xExpand,pUserData);
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	 return rc;
}
/*
 * [CAPIREF: ph7_delete_constant()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_delete_constant(ph7_vm *pVm,const char *zName)
{
	ph7_constant *pCons;
	int rc;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
#if defined(PH7_ENABLE_THREADS)
	 /* Acquire VM mutex */
	 SyMutexEnter(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
	 if( sMPGlobal.nThreadingLevel > PH7_THREAD_LEVEL_SINGLE && 
		 PH7_THRD_VM_RELEASE(pVm) ){
			 return PH7_ABORT; /* Another thread have released this instance */
	 }
#endif
	 /* Query the constant hashtable */
	 rc = SyHashDeleteEntry(&pVm->hConstant,(const void *)zName,SyStrlen(zName),(void **)&pCons);
	 if( rc == PH7_OK ){
		 /* Perform the deletion */
		 SyMemBackendFree(&pVm->sAllocator,(void *)SyStringData(&pCons->sName));
		 SyMemBackendPoolFree(&pVm->sAllocator,pCons);
	 }
#if defined(PH7_ENABLE_THREADS)
	 /* Leave VM mutex */
	 SyMutexLeave(sMPGlobal.pMutexMethods,pVm->pMutex); /* NO-OP if sMPGlobal.nThreadingLevel != PH7_THREAD_LEVEL_MULTI */
#endif
	return rc;
}
/*
 * [CAPIREF: ph7_new_scalar()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_value * ph7_new_scalar(ph7_vm *pVm)
{
	ph7_value *pObj;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return 0;
	}
	/* Allocate a new scalar variable */
	pObj = (ph7_value *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_value));
	if( pObj == 0 ){
		return 0;
	}
	/* Nullify the new scalar */
	PH7_MemObjInit(pVm,pObj);
	return pObj;
}
/*
 * [CAPIREF: ph7_new_array()] 
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_value * ph7_new_array(ph7_vm *pVm)
{
	ph7_hashmap *pMap;
	ph7_value *pObj;
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return 0;
	}
	/* Create a new hashmap first */
	pMap = PH7_NewHashmap(&(*pVm),0,0);
	if( pMap == 0 ){
		return 0;
	}
	/* Associate a new ph7_value with this hashmap */
	pObj = (ph7_value *)SyMemBackendPoolAlloc(&pVm->sAllocator,sizeof(ph7_value));
	if( pObj == 0 ){
		PH7_HashmapRelease(pMap,TRUE);
		return 0;
	}
	PH7_MemObjInitFromArray(pVm,pObj,pMap);
	return pObj;
}
/*
 * [CAPIREF: ph7_release_value()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_release_value(ph7_vm *pVm,ph7_value *pValue)
{
	/* Ticket 1433-002: NULL VM is harmless operation */
	if ( PH7_VM_MISUSE(pVm) ){
		return PH7_CORRUPT;
	}
	if( pValue ){
		/* Release the value */
		PH7_MemObjRelease(pValue);
		SyMemBackendPoolFree(&pVm->sAllocator,pValue);
	}
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_to_int()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_to_int(ph7_value *pValue)
{
	int rc;
	rc = PH7_MemObjToInteger(pValue);
	if( rc != PH7_OK ){
		return 0;
	}
	return (int)pValue->x.iVal;
}
/*
 * [CAPIREF: ph7_value_to_bool()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_to_bool(ph7_value *pValue)
{
	int rc;
	rc = PH7_MemObjToBool(pValue);
	if( rc != PH7_OK ){
		return 0;
	}
	return (int)pValue->x.iVal;
}
/*
 * [CAPIREF: ph7_value_to_int64()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_int64 ph7_value_to_int64(ph7_value *pValue)
{
	int rc;
	rc = PH7_MemObjToInteger(pValue);
	if( rc != PH7_OK ){
		return 0;
	}
	return pValue->x.iVal;
}
/*
 * [CAPIREF: ph7_value_to_double()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
double ph7_value_to_double(ph7_value *pValue)
{
	int rc;
	rc = PH7_MemObjToReal(pValue);
	if( rc != PH7_OK ){
		return (double)0;
	}
	return (double)pValue->rVal;
}
/*
 * [CAPIREF: ph7_value_to_string()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_value_to_string(ph7_value *pValue,int *pLen)
{
	PH7_MemObjToString(pValue);
	if( SyBlobLength(&pValue->sBlob) > 0 ){
		SyBlobNullAppend(&pValue->sBlob);
		if( pLen ){
			*pLen = (int)SyBlobLength(&pValue->sBlob);
		}
		return (const char *)SyBlobData(&pValue->sBlob);
	}else{
		/* Return the empty string */
		if( pLen ){
			*pLen = 0;
		}
		return "";
	}
}
/*
 * [CAPIREF: ph7_value_to_resource()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void * ph7_value_to_resource(ph7_value *pValue)
{
	if( (pValue->iFlags & MEMOBJ_RES) == 0 ){
		/* Not a resource,return NULL */
		return 0;
	}
	return pValue->x.pOther;
}
/*
 * [CAPIREF: ph7_value_compare()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_compare(ph7_value *pLeft,ph7_value *pRight,int bStrict)
{
	int rc;
	if( pLeft == 0 || pRight == 0 ){
		/* TICKET 1433-24: NULL values is harmless operation */
		return 1;
	}
	/* Perform the comparison */
	rc = PH7_MemObjCmp(&(*pLeft),&(*pRight),bStrict,0);
	/* Comparison result */
	return rc;
}
/*
 * [CAPIREF: ph7_result_int()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_int(ph7_context *pCtx,int iValue)
{
	return ph7_value_int(pCtx->pRet,iValue);
}
/*
 * [CAPIREF: ph7_result_int64()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_int64(ph7_context *pCtx,ph7_int64 iValue)
{
	return ph7_value_int64(pCtx->pRet,iValue);
}
/*
 * [CAPIREF: ph7_result_bool()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_bool(ph7_context *pCtx,int iBool)
{
	return ph7_value_bool(pCtx->pRet,iBool);
}
/*
 * [CAPIREF: ph7_result_double()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_double(ph7_context *pCtx,double Value)
{
	return ph7_value_double(pCtx->pRet,Value);
}
/*
 * [CAPIREF: ph7_result_null()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_null(ph7_context *pCtx)
{
	/* Invalidate any prior representation and set the NULL flag */
	PH7_MemObjRelease(pCtx->pRet);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_result_string()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_string(ph7_context *pCtx,const char *zString,int nLen)
{
	return ph7_value_string(pCtx->pRet,zString,nLen);
}
/*
 * [CAPIREF: ph7_result_string_format()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_string_format(ph7_context *pCtx,const char *zFormat,...)
{
	ph7_value *p;
	va_list ap;
	int rc;
	p = pCtx->pRet;
	if( (p->iFlags & MEMOBJ_STRING) == 0 ){
		/* Invalidate any prior representation */
		PH7_MemObjRelease(p);
		MemObjSetType(p,MEMOBJ_STRING);
	}
	/* Format the given string */
	va_start(ap,zFormat);
	rc = SyBlobFormatAp(&p->sBlob,zFormat,ap);
	va_end(ap);
	return rc;
}
/*
 * [CAPIREF: ph7_result_value()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_value(ph7_context *pCtx,ph7_value *pValue)
{
	int rc = PH7_OK;
	if( pValue == 0 ){
		PH7_MemObjRelease(pCtx->pRet);
	}else{
		rc = PH7_MemObjStore(pValue,pCtx->pRet);
	}
	return rc;
}
/*
 * [CAPIREF: ph7_result_resource()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_result_resource(ph7_context *pCtx,void *pUserData)
{
	return ph7_value_resource(pCtx->pRet,pUserData);
}
/*
 * [CAPIREF: ph7_context_new_scalar()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_value * ph7_context_new_scalar(ph7_context *pCtx)
{
	ph7_value *pVal;
	pVal = ph7_new_scalar(pCtx->pVm);
	if( pVal ){
		/* Record value address so it can be freed automatically
		 * when the calling function returns. 
		 */
		SySetPut(&pCtx->sVar,(const void *)&pVal);
	}
	return pVal;
}
/*
 * [CAPIREF: ph7_context_new_array()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_value * ph7_context_new_array(ph7_context *pCtx)
{
	ph7_value *pVal;
	pVal = ph7_new_array(pCtx->pVm);
	if( pVal ){
		/* Record value address so it can be freed automatically
		 * when the calling function returns. 
		 */
		SySetPut(&pCtx->sVar,(const void *)&pVal);
	}
	return pVal;
}
/*
 * [CAPIREF: ph7_context_release_value()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void ph7_context_release_value(ph7_context *pCtx,ph7_value *pValue)
{
	PH7_VmReleaseContextValue(&(*pCtx),pValue);
}
/*
 * [CAPIREF: ph7_context_alloc_chunk()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void * ph7_context_alloc_chunk(ph7_context *pCtx,unsigned int nByte,int ZeroChunk,int AutoRelease)
{
	void *pChunk;
	pChunk = SyMemBackendAlloc(&pCtx->pVm->sAllocator,nByte);
	if( pChunk ){
		if( ZeroChunk ){
			/* Zero the memory chunk */
			SyZero(pChunk,nByte);
		}
		if( AutoRelease ){
			ph7_aux_data sAux;
			/* Track the chunk so that it can be released automatically 
			 * upon this context is destroyed.
			 */
			sAux.pAuxData = pChunk;
			SySetPut(&pCtx->sChunk,(const void *)&sAux);
		}
	}
	return pChunk;
}
/*
 * Check if the given chunk address is registered in the call context
 * chunk container.
 * Return TRUE if registered.FALSE otherwise.
 * Refer to [ph7_context_realloc_chunk(),ph7_context_free_chunk()].
 */
static ph7_aux_data * ContextFindChunk(ph7_context *pCtx,void *pChunk)
{
	ph7_aux_data *aAux,*pAux;
	sxu32 n;
	if( SySetUsed(&pCtx->sChunk) < 1 ){
		/* Don't bother processing,the container is empty */
		return 0;
	}
	/* Perform the lookup */
	aAux = (ph7_aux_data *)SySetBasePtr(&pCtx->sChunk);
	for( n = 0; n < SySetUsed(&pCtx->sChunk) ; ++n ){
		pAux = &aAux[n];
		if( pAux->pAuxData == pChunk ){
			/* Chunk found */
			return pAux;
		}
	}
	/* No such allocated chunk */
	return 0;
}
/*
 * [CAPIREF: ph7_context_realloc_chunk()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void * ph7_context_realloc_chunk(ph7_context *pCtx,void *pChunk,unsigned int nByte)
{
	ph7_aux_data *pAux;
	void *pNew;
	pNew = SyMemBackendRealloc(&pCtx->pVm->sAllocator,pChunk,nByte);
	if( pNew ){
		pAux = ContextFindChunk(pCtx,pChunk);
		if( pAux ){
			pAux->pAuxData = pNew;
		}
	}
	return pNew;
}
/*
 * [CAPIREF: ph7_context_free_chunk()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void ph7_context_free_chunk(ph7_context *pCtx,void *pChunk)
{
	ph7_aux_data *pAux;
	if( pChunk == 0 ){
		/* TICKET-1433-93: NULL chunk is a harmless operation */
		return;
	}
	pAux = ContextFindChunk(pCtx,pChunk);
	if( pAux ){
		/* Mark as destroyed */
		pAux->pAuxData = 0;
	}
	SyMemBackendFree(&pCtx->pVm->sAllocator,pChunk);
}
/*
 * [CAPIREF: ph7_array_fetch()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_value * ph7_array_fetch(ph7_value *pArray,const char *zKey,int nByte)
{
	ph7_hashmap_node *pNode;
	ph7_value *pValue;
	ph7_value skey;
	int rc;
	/* Make sure we are dealing with a valid hashmap */
	if( (pArray->iFlags & MEMOBJ_HASHMAP) == 0 ){
		return 0;
	}
	if( nByte < 0 ){
		nByte = (int)SyStrlen(zKey);
	}
	/* Convert the key to a ph7_value  */
	PH7_MemObjInit(pArray->pVm,&skey);
	PH7_MemObjStringAppend(&skey,zKey,(sxu32)nByte);
	/* Perform the lookup */
	rc = PH7_HashmapLookup((ph7_hashmap *)pArray->x.pOther,&skey,&pNode);
	PH7_MemObjRelease(&skey);
	if( rc != PH7_OK ){
		/* No such entry */
		return 0;
	}
	/* Extract the target value */
	pValue = (ph7_value *)SySetAt(&pArray->pVm->aMemObj,pNode->nValIdx);
	return pValue;
}
/*
 * [CAPIREF: ph7_array_walk()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_array_walk(ph7_value *pArray,int (*xWalk)(ph7_value *pValue,ph7_value *,void *),void *pUserData)
{
	int rc;
	if( xWalk == 0 ){
		return PH7_CORRUPT;
	}
	/* Make sure we are dealing with a valid hashmap */
	if( (pArray->iFlags & MEMOBJ_HASHMAP) == 0 ){
		return PH7_CORRUPT;
	}
	/* Start the walk process */
	rc = PH7_HashmapWalk((ph7_hashmap *)pArray->x.pOther,xWalk,pUserData);
	return rc != PH7_OK ? PH7_ABORT /* User callback request an operation abort*/ : PH7_OK;
}
/*
 * [CAPIREF: ph7_array_add_elem()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_array_add_elem(ph7_value *pArray,ph7_value *pKey,ph7_value *pValue)
{
	int rc;
	/* Make sure we are dealing with a valid hashmap */
	if( (pArray->iFlags & MEMOBJ_HASHMAP) == 0 ){
		return PH7_CORRUPT;
	}
	/* Perform the insertion */
	rc = PH7_HashmapInsert((ph7_hashmap *)pArray->x.pOther,&(*pKey),&(*pValue));
	return rc;
}
/*
 * [CAPIREF: ph7_array_add_strkey_elem()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_array_add_strkey_elem(ph7_value *pArray,const char *zKey,ph7_value *pValue)
{
	int rc;
	/* Make sure we are dealing with a valid hashmap */
	if( (pArray->iFlags & MEMOBJ_HASHMAP) == 0 ){
		return PH7_CORRUPT;
	}
	/* Perform the insertion */
	if( SX_EMPTY_STR(zKey) ){
		/* Empty key,assign an automatic index */
		rc = PH7_HashmapInsert((ph7_hashmap *)pArray->x.pOther,0,&(*pValue));
	}else{
		ph7_value sKey;
		PH7_MemObjInitFromString(pArray->pVm,&sKey,0);
		PH7_MemObjStringAppend(&sKey,zKey,(sxu32)SyStrlen(zKey));
		rc = PH7_HashmapInsert((ph7_hashmap *)pArray->x.pOther,&sKey,&(*pValue));
		PH7_MemObjRelease(&sKey);
	}
	return rc;
}
/*
 * [CAPIREF: ph7_array_add_intkey_elem()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_array_add_intkey_elem(ph7_value *pArray,int iKey,ph7_value *pValue)
{
	ph7_value sKey;
	int rc;
	/* Make sure we are dealing with a valid hashmap */
	if( (pArray->iFlags & MEMOBJ_HASHMAP) == 0 ){
		return PH7_CORRUPT;
	}
	PH7_MemObjInitFromInt(pArray->pVm,&sKey,iKey);
	/* Perform the insertion */
	rc = PH7_HashmapInsert((ph7_hashmap *)pArray->x.pOther,&sKey,&(*pValue));
	PH7_MemObjRelease(&sKey);
	return rc;
}
/*
 * [CAPIREF: ph7_array_count()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
unsigned int ph7_array_count(ph7_value *pArray)
{
	ph7_hashmap *pMap;
	/* Make sure we are dealing with a valid hashmap */
	if( (pArray->iFlags & MEMOBJ_HASHMAP) == 0 ){
		return 0;
	}
	/* Point to the internal representation of the hashmap */
	pMap = (ph7_hashmap *)pArray->x.pOther;
	return pMap->nEntry;
}
/*
 * [CAPIREF: ph7_object_walk()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_object_walk(ph7_value *pObject,int (*xWalk)(const char *,ph7_value *,void *),void *pUserData)
{
	int rc;
	if( xWalk == 0 ){
		return PH7_CORRUPT;
	}
	/* Make sure we are dealing with a valid class instance */
	if( (pObject->iFlags & MEMOBJ_OBJ) == 0 ){
		return PH7_CORRUPT;
	}
	/* Start the walk process */
	rc = PH7_ClassInstanceWalk((ph7_class_instance *)pObject->x.pOther,xWalk,pUserData);
	return rc != PH7_OK ? PH7_ABORT /* User callback request an operation abort*/ : PH7_OK;
}
/*
 * [CAPIREF: ph7_object_fetch_attr()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
ph7_value * ph7_object_fetch_attr(ph7_value *pObject,const char *zAttr)
{
	ph7_value *pValue;
	SyString sAttr;
	/* Make sure we are dealing with a valid class instance */
	if( (pObject->iFlags & MEMOBJ_OBJ) == 0 || zAttr == 0 ){
		return 0; 
	}
	SyStringInitFromBuf(&sAttr,zAttr,SyStrlen(zAttr));
	/* Extract the attribute value if available.
	 */
	pValue = PH7_ClassInstanceFetchAttr((ph7_class_instance *)pObject->x.pOther,&sAttr);
	return pValue;
}
/*
 * [CAPIREF: ph7_object_get_class_name()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_object_get_class_name(ph7_value *pObject,int *pLength)
{
	ph7_class *pClass;
	if( pLength ){
		*pLength = 0;
	}
	/* Make sure we are dealing with a valid class instance */
	if( (pObject->iFlags & MEMOBJ_OBJ) == 0  ){
		return 0; 
	}
	/* Point to the class */
	pClass = ((ph7_class_instance *)pObject->x.pOther)->pClass;
	/* Return the class name */
	if( pLength ){
		*pLength = (int)SyStringLength(&pClass->sName);
	}
	return SyStringData(&pClass->sName);
}
/*
 * [CAPIREF: ph7_context_output()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_context_output(ph7_context *pCtx,const char *zString,int nLen)
{
	SyString sData;
	int rc;
	if( nLen < 0 ){
		nLen = (int)SyStrlen(zString);
	}
	SyStringInitFromBuf(&sData,zString,nLen);
	rc = PH7_VmOutputConsume(pCtx->pVm,&sData);
	return rc;
}
/*
 * [CAPIREF: ph7_context_output_format()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_context_output_format(ph7_context *pCtx,const char *zFormat,...)
{
	va_list ap;
	int rc;
	va_start(ap,zFormat);
	rc = PH7_VmOutputConsumeAp(pCtx->pVm,zFormat,ap);
	va_end(ap);
	return rc;
}
/*
 * [CAPIREF: ph7_context_throw_error()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_context_throw_error(ph7_context *pCtx,int iErr,const char *zErr)
{
	int rc = PH7_OK;
	if( zErr ){
		rc = PH7_VmThrowError(pCtx->pVm,&pCtx->pFunc->sName,iErr,zErr);
	}
	return rc;
}
/*
 * [CAPIREF: ph7_context_throw_error_format()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_context_throw_error_format(ph7_context *pCtx,int iErr,const char *zFormat,...)
{
	va_list ap;
	int rc;
	if( zFormat == 0){
		return PH7_OK;
	}
	va_start(ap,zFormat);
	rc = PH7_VmThrowErrorAp(pCtx->pVm,&pCtx->pFunc->sName,iErr,zFormat,ap);
	va_end(ap);
	return rc;
}
/*
 * [CAPIREF: ph7_context_random_num()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
unsigned int ph7_context_random_num(ph7_context *pCtx)
{
	sxu32 n;
	n = PH7_VmRandomNum(pCtx->pVm);
	return n;
}
/*
 * [CAPIREF: ph7_context_random_string()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_context_random_string(ph7_context *pCtx,char *zBuf,int nBuflen)
{
	if( nBuflen < 3 ){
		return PH7_CORRUPT;
	}
	PH7_VmRandomString(pCtx->pVm,zBuf,nBuflen);
	return PH7_OK;
}
/*
 * IMP-12-07-2012 02:10 Experimantal public API.
 *
 * ph7_vm * ph7_context_get_vm(ph7_context *pCtx)
 * {
 *	return pCtx->pVm;
 * }
 */
/*
 * [CAPIREF: ph7_context_user_data()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void * ph7_context_user_data(ph7_context *pCtx)
{
	return pCtx->pFunc->pUserData;
}
/*
 * [CAPIREF: ph7_context_push_aux_data()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_context_push_aux_data(ph7_context *pCtx,void *pUserData)
{
	ph7_aux_data sAux;
	int rc;
	sAux.pAuxData = pUserData;
	rc = SySetPut(&pCtx->pFunc->aAux,(const void *)&sAux);
	return rc;
}
/*
 * [CAPIREF: ph7_context_peek_aux_data()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void * ph7_context_peek_aux_data(ph7_context *pCtx)
{
	ph7_aux_data *pAux;
	pAux = (ph7_aux_data *)SySetPeek(&pCtx->pFunc->aAux);
	return pAux ? pAux->pAuxData : 0;
}
/*
 * [CAPIREF: ph7_context_pop_aux_data()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
void * ph7_context_pop_aux_data(ph7_context *pCtx)
{
	ph7_aux_data *pAux;
	pAux = (ph7_aux_data *)SySetPop(&pCtx->pFunc->aAux);
	return pAux ? pAux->pAuxData : 0;
}
/*
 * [CAPIREF: ph7_context_result_buf_length()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
unsigned int ph7_context_result_buf_length(ph7_context *pCtx)
{
	return SyBlobLength(&pCtx->pRet->sBlob);
}
/*
 * [CAPIREF: ph7_function_name()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
const char * ph7_function_name(ph7_context *pCtx)
{
	SyString *pName;
	pName = &pCtx->pFunc->sName;
	return pName->zString;
}
/*
 * [CAPIREF: ph7_value_int()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_int(ph7_value *pVal,int iValue)
{
	/* Invalidate any prior representation */
	PH7_MemObjRelease(pVal);
	pVal->x.iVal = (ph7_int64)iValue;
	MemObjSetType(pVal,MEMOBJ_INT);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_int64()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_int64(ph7_value *pVal,ph7_int64 iValue)
{
	/* Invalidate any prior representation */
	PH7_MemObjRelease(pVal);
	pVal->x.iVal = iValue;
	MemObjSetType(pVal,MEMOBJ_INT);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_bool()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_bool(ph7_value *pVal,int iBool)
{
	/* Invalidate any prior representation */
	PH7_MemObjRelease(pVal);
	pVal->x.iVal = iBool ? 1 : 0;
	MemObjSetType(pVal,MEMOBJ_BOOL);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_null()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_null(ph7_value *pVal)
{
	/* Invalidate any prior representation and set the NULL flag */
	PH7_MemObjRelease(pVal);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_double()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_double(ph7_value *pVal,double Value)
{
	/* Invalidate any prior representation */
	PH7_MemObjRelease(pVal);
	pVal->rVal = (ph7_real)Value;
	MemObjSetType(pVal,MEMOBJ_REAL);
	/* Try to get an integer representation also */
	PH7_MemObjTryInteger(pVal);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_string()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_string(ph7_value *pVal,const char *zString,int nLen)
{
	if((pVal->iFlags & MEMOBJ_STRING) == 0 ){
		/* Invalidate any prior representation */
		PH7_MemObjRelease(pVal);
		MemObjSetType(pVal,MEMOBJ_STRING);
	}
	if( zString ){
		if( nLen < 0 ){
			/* Compute length automatically */
			nLen = (int)SyStrlen(zString);
		}
		SyBlobAppend(&pVal->sBlob,(const void *)zString,(sxu32)nLen);
	}
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_string_format()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_string_format(ph7_value *pVal,const char *zFormat,...)
{
	va_list ap;
	int rc;
	if((pVal->iFlags & MEMOBJ_STRING) == 0 ){
		/* Invalidate any prior representation */
		PH7_MemObjRelease(pVal);
		MemObjSetType(pVal,MEMOBJ_STRING);
	}
	va_start(ap,zFormat);
	rc = SyBlobFormatAp(&pVal->sBlob,zFormat,ap);
	va_end(ap);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_reset_string_cursor()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_reset_string_cursor(ph7_value *pVal)
{
	/* Reset the string cursor */
	SyBlobReset(&pVal->sBlob);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_resource()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_resource(ph7_value *pVal,void *pUserData)
{
	/* Invalidate any prior representation */
	PH7_MemObjRelease(pVal);
	/* Reflect the new type */
	pVal->x.pOther = pUserData;
	MemObjSetType(pVal,MEMOBJ_RES);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_release()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_release(ph7_value *pVal)
{
	PH7_MemObjRelease(pVal);
	return PH7_OK;
}
/*
 * [CAPIREF: ph7_value_is_int()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_int(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_INT) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_float()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_float(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_REAL) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_bool()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_bool(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_BOOL) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_string()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_string(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_STRING) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_null()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_null(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_NULL) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_numeric()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_numeric(ph7_value *pVal)
{
	int rc;
	rc = PH7_MemObjIsNumeric(pVal);
	return rc;
}
/*
 * [CAPIREF: ph7_value_is_callable()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_callable(ph7_value *pVal)
{
	int rc;
	rc = PH7_VmIsCallable(pVal->pVm,pVal,FALSE);
	return rc;
}
/*
 * [CAPIREF: ph7_value_is_scalar()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_scalar(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_SCALAR) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_array()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_array(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_HASHMAP) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_object()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_object(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_OBJ) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_resource()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_resource(ph7_value *pVal)
{
	return (pVal->iFlags & MEMOBJ_RES) ? TRUE : FALSE;
}
/*
 * [CAPIREF: ph7_value_is_empty()]
 * Please refer to the official documentation for function purpose and expected parameters.
 */
int ph7_value_is_empty(ph7_value *pVal)
{
	int rc;
	rc = PH7_MemObjIsEmpty(pVal);
	return rc;
}
/* END-OF-IMPLEMENTATION: ph7@embedded@symisc 345-09-46 */
/*
 * Symisc PH7: An embeddable bytecode compiler and a virtual machine for the PHP(5) programming language.
 * Copyright (C) 2011-2012,Symisc Systems http://ph7.symisc.net/
 * Version 2.1.4
 * For information on licensing,redistribution of this file,and for a DISCLAIMER OF ALL WARRANTIES
 * please contact Symisc Systems via:
 *       legal@symisc.net
 *       licensing@symisc.net
 *       contact@symisc.net
 * or visit:
 *      http://ph7.symisc.net/
 */
/*
 * Copyright (C) 2011, 2012 Symisc Systems. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Redistributions in any form must be accompanied by information on
 *    how to obtain complete source code for the PH7 engine and any 
 *    accompanying software that uses the PH7 engine software.
 *    The source code must either be included in the distribution
 *    or be available for no more than the cost of distribution plus
 *    a nominal fee, and must be freely redistributable under reasonable
 *    conditions. For an executable file, complete source code means
 *    the source code for all modules it contains.It does not include
 *    source code for modules or files that typically accompany the major
 *    components of the operating system on which the executable file runs.
 *
 * THIS SOFTWARE IS PROVIDED BY SYMISC SYSTEMS ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT, ARE DISCLAIMED.  IN NO EVENT SHALL SYMISC SYSTEMS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */