fortify-headers/include/wchar.h

#ifndef FORTIFY_WCHAR_H_
#define FORTIFY_WCHAR_H_

#include_next <stdlib.h>
#include_next <wchar.h>

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

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_fgetws(wchar_t *s, int n, FILE *fp)
{
	size_t bos = __builtin_object_size(s, 0);

	if ((size_t)n > bos / sizeof(wchar_t))
		__builtin_trap();
	return fgetws(s, n, fp);
}

static inline __attribute__ ((always_inline))
size_t
__fortify_mbsnrtowcs(wchar_t *d, const char **s, size_t n,
                     size_t wn, mbstate_t *st)
{
	size_t bos = __builtin_object_size(d, 0);
	size_t actual;

	if (wn > (size_t)-1 / sizeof(wchar_t))
		__builtin_trap();
	actual = wn * sizeof(wchar_t);
	if (actual > n)
		actual = n;
	if (actual > bos)
		__builtin_trap();
	return mbsnrtowcs(d, s, n, wn, st);
}

static inline __attribute__ ((always_inline))
size_t
__fortify_mbsrtowcs(wchar_t *d, const char **s,
                    size_t wn, mbstate_t *st)
{
	size_t bos = __builtin_object_size(d, 0);
	size_t r;

	bos /= sizeof(wchar_t);
	r = mbsrtowcs(d, s, wn > bos ? bos : wn, st);
	if (bos < wn && d && *s && r != (size_t)-1)
		__builtin_trap();
	return r;
}

static inline __attribute__ ((always_inline))
size_t
__fortify_mbstowcs(wchar_t *ws, const char *s, size_t wn)
{
	size_t bos = __builtin_object_size(ws, 0);

	if (wn > bos / sizeof(wchar_t))
		__builtin_trap();
	return mbstowcs(ws, s, wn);
}

static inline __attribute__ ((always_inline))
size_t
__fortify_wcrtomb(char *s, wchar_t wc, mbstate_t *st)
{
	size_t bos = __builtin_object_size(s, 0);

	if (MB_CUR_MAX > bos)
		__builtin_trap();
	return wcrtomb(s, wc, st);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wcscat(wchar_t *d, const wchar_t *s)
{
	size_t bos = __builtin_object_size(d, 0);

	if (wcslen(s) + wcslen(d) + 1 > bos / sizeof(wchar_t))
		__builtin_trap();
	return wcscat(d, s);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wcscpy(wchar_t *d, const wchar_t *s)
{
	size_t bos = __builtin_object_size(d, 0);

	if (wcslen(s) + 1 > bos / sizeof(wchar_t))
		__builtin_trap();
	return wcscpy(d, s);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wcsncat(wchar_t *d, const wchar_t *s, size_t n)
{
	size_t bos = __builtin_object_size(d, 0);
	size_t slen, dlen;

	if (n > bos / sizeof(wchar_t)) {
		slen = wcslen(s);
		dlen = wcslen(d);
		if (slen > n)
			slen = n;
		if (slen + dlen + 1 > bos / sizeof(wchar_t))
			__builtin_trap();
	}
	return wcsncat(d, s, n);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wcsncpy(wchar_t *d, const wchar_t *s, size_t n)
{
	size_t bos = __builtin_object_size(d, 0);

	if (n > bos / sizeof(wchar_t))
		__builtin_trap();
	return wcsncpy(d, s, n);
}

static inline __attribute__ ((always_inline))
size_t
__fortify_wcsnrtombs(char *d, const wchar_t **s, size_t wn,
                     size_t n, mbstate_t *st)
{
	size_t bos = __builtin_object_size(d, 0);
	size_t actual;

	if (wn > (size_t)-1 / sizeof(wchar_t))
		__builtin_trap();
	actual = wn * sizeof(wchar_t);
	if (actual > n)
		actual = n;
	if (actual > bos)
		__builtin_trap();
	return wcsnrtombs(d, s, wn, n, st);
}

static inline __attribute__ ((always_inline))
size_t
__fortify_wcsrtombs(char *d, const wchar_t **s, size_t n,
                    mbstate_t *st)
{
	size_t bos = __builtin_object_size(d, 0);

	if (n > bos)
		__builtin_trap();
	return wcsrtombs(d, s, n, st);
}

static inline __attribute__ ((always_inline))
size_t
__fortify_wcstombs(char *s, const wchar_t *ws, size_t n)
{
	size_t bos = __builtin_object_size(s, 0);

	if (n > bos)
		__builtin_trap();
	return wcstombs(s, ws, n);
}

static inline __attribute__ ((always_inline))
int
__fortify_wctomb(char *s, wchar_t wc)
{
	size_t bos = __builtin_object_size(s, 0);

	if (MB_CUR_MAX > bos)
		__builtin_trap();
	return wctomb(s, wc);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wmemcpy(wchar_t *d, const wchar_t *s, size_t n)
{
	size_t bos = __builtin_object_size(d, 0);

	if (n > bos / sizeof(wchar_t))
		__builtin_trap();
	return wmemcpy(d, s, n);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wmemmove(wchar_t *d, const wchar_t *s, size_t n)
{
	size_t bos = __builtin_object_size(d, 0);

	if (n > bos / sizeof(wchar_t))
		__builtin_trap();
	return wmemmove(d, s, n);
}

static inline __attribute__ ((always_inline))
wchar_t *
__fortify_wmemset(wchar_t *s, wchar_t c, size_t n)
{
	size_t bos = __builtin_object_size(s, 0);

	if (n > bos / sizeof(wchar_t))
		__builtin_trap();
	return wmemset(s, c, n);
}

#undef fgetws
#define fgetws(s, n, fp) __fortify_fgetws(s, n, fp)
#undef mbsnrtowcs
#define mbsnrtowcs(d, s, n, wn, st) __fortify_mbsnrtowcs(d, s, n, wn, st)
#undef mbsrtowcs
#define mbsrtowcs(d, s, wn, st) __fortify_mbsrtowcs(d, s, wn, st)
#undef mbstowcs
#define mbstowcs(ws, s, wn) __fortify_mbstowcs(ws, s, wn)
#undef wcrtomb
#define wcrtomb(s, wc, st) __fortify_wcrtomb(s, wc, st)
#undef wcscat
#define wcscat(d, s) __fortify_wcscat(d, s)
#undef wcscpy
#define wcscpy(d, s) __fortify_wcscpy(d, s)
#undef wcsncat
#define wcsncat(d, s, n) __fortify_wcsncat(d, s, n)
#undef wcsncpy
#define wcsncpy(d, s, n) __fortify_wcsncpy(d, s, n)
#undef wcsnrtombs
#define wcsnrtombs(d, s, wn, n, st) __fortify_wcsnrtombs(d, s, wn, n, st)
#undef wcsrtombs
#define wcsrtombs(d, s, n, st) __fortify_wcsrtombs(d, s, n, st)
#undef wcstombs
#define wcstombs(s, ws, n) __fortify_wcstombs(s, ws, n)
#undef wctomb
#define wctomb(s, wc) __fortify_wctomb(s, wc)
#undef wmemcpy
#define wmemcpy(d, s, n) __fortify_wmemcpy(d, s, n)
#undef wmemmove
#define wmemmove(d, s, n) __fortify_wmemmove(d, s, n)
#undef wmemset
#define wmemset(s, c, n) __fortify_wmemset(s, c, n)

#endif

#endif