#ifndef LIGHTNING_COMMON_OVERFLOWS_H
#define LIGHTNING_COMMON_OVERFLOWS_H
#include "../config.h"
#include "ccan/short_types/short_types.h"

static inline bool add_overflows_size_t(uint64_t a, uint64_t b)
{
    return (size_t)a != a || (size_t)b != b || (a + b) < (size_t)a;
}

static inline bool add_overflows_u64(uint64_t a, uint64_t b)
{
    return (a + b) < a;
}

static inline bool mul_overflows_u64(uint64_t a, uint64_t b)
{
    uint64_t ret;

    if (a == 0)
        return false;
    ret = a * b;
    return (ret / a != b);
}

static inline bool assign_overflow_u8(u8 *dst, uint64_t v)
{
    *dst = v;
    return *dst == v;
}

static inline bool assign_overflow_u16(u16 *dst, uint64_t v)
{
    *dst = v;
    return *dst == v;
}

static inline bool assign_overflow_u32(u32 *dst, uint64_t v)
{
    *dst = (u32)v;
    return *dst == v;
}
#endif /* LIGHTNING_COMMON_OVERFLOWS_H */
