1 /* Copyright (C) 2005-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
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.
8
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.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <locale.h>
19 #include <string.h>
20 #include <wchar.h>
21
22
23 size_t
__mbstowcs_chk(wchar_t * dst,const char * src,size_t len,size_t dstlen)24 __mbstowcs_chk (wchar_t *dst, const char *src, size_t len, size_t dstlen)
25 {
26 if (__glibc_unlikely (dstlen < len))
27 __chk_fail ();
28
29 mbstate_t state;
30
31 memset (&state, '\0', sizeof state);
32 /* Return how many we wrote (or maybe an error). */
33 return __mbsrtowcs (dst, &src, len, &state);
34 }
35