win32.h

#ifndef _WIN32_HELPER_INCLUDE
#define _WIN32_HELPER_INCLUDE
#ifdef _MSC_VER

#ifndef inline
#define inline __inline
#endif

#ifndef va_copy
#define va_copy(d,s) ((d) = (s))
#endif

#ifndef snprintf
#define snprintf c99_snprintf

__inline int c99_vsnprintf(char* str, size_t size, const char* format, va_list ap)
{
    int count = -1;

    if (size != 0)
        count = _vsnprintf_s(str, size, _TRUNCATE, format, ap);
    if (count == -1)
        count = _vscprintf(format, ap);

    return count;
}

__inline int c99_snprintf(char* str, size_t size, const char* format, ...)
{
    int count;
    va_list ap;

    va_start(ap, format);
    count = c99_vsnprintf(str, size, format, ap);
    va_end(ap);

    return count;
}
#endif

#endif
#endif