#ifndef FORTIFY_STDIO_H_
#define FORTIFY_STDIO_H_

#include_next <stdio.h>

#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0

static inline
__attribute__ ((always_inline))
__attribute__ ((__format__ (printf, 3, 0)))
__attribute__ ((__nonnull__ (3)))
int __fortify_vsnprintf(char *__restrict s, size_t n, const char *__restrict fmt, __va_list ap)
{
	size_t bos = __builtin_object_size(s, 0);

	if (bos == (size_t)-1)
		return vsnprintf(s, n, fmt, ap);
	if (__builtin_constant_p(n) && n > bos)
		__builtin_trap();
	return vsnprintf(s, n, fmt, ap);
}

#undef vsnprintf
#define vsnprintf(s, n, fmt, ap) __fortify_vsnprintf(s, n, fmt, ap)

#endif

#endif