1/* Copyright (C) 1998-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <wchar.h>
20
21#ifdef WCSNLEN
22# define __wcsnlen WCSNLEN
23#endif
24
25/* Return length of string S at most maxlen. */
26size_t
27__wcsnlen (const wchar_t *s, size_t maxlen)
28{
29 const wchar_t *ret = __wmemchr (s, L'\0', maxlen);
30 if (ret)
31 maxlen = ret - s;
32 return maxlen;
33}
34#ifndef WCSNLEN
35weak_alias (__wcsnlen, wcsnlen)
36#endif
37