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[glibc/history.git] / debug / mbstowcs_chk.c
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1 /* Copyright (C) 2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <locale.h>
20 #include <string.h>
21 #include <wchar.h>
24 size_t
25 __mbstowcs_chk (wchar_t *dst, const char *src, size_t len, size_t dstlen)
27 if (__builtin_expect (dstlen < len, 0))
28 __chk_fail ();
30 mbstate_t state;
32 memset (&state, '\0', sizeof state);
33 /* Return how many we wrote (or maybe an error). */
34 return __mbsrtowcs (dst, &src, len, &state);