1/* Find the length of STRING, but scan at most MAXLEN characters.
2   Copyright (C) 1996, 1997, 1998, 2000-2003 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2, or (at your option)
8   any later version.
9
10   This program 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
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License along
16   with this program; if not, write to the Free Software Foundation,
17   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
18
19#if HAVE_CONFIG_H
20# include <config.h>
21#endif
22#undef strnlen
23
24#include <string.h>
25
26#undef __strnlen
27#undef strnlen
28
29#ifndef _LIBC
30# define strnlen rpl_strnlen
31#endif
32
33#ifndef weak_alias
34# define __strnlen strnlen
35#endif
36
37/* Find the length of STRING, but scan at most MAXLEN characters.
38   If no '\0' terminator is found in that many characters, return MAXLEN.  */
39
40size_t
41__strnlen (const char *string, size_t maxlen)
42{
43  const char *end = memchr (string, '\0', maxlen);
44  return end ? (size_t) (end - string) : maxlen;
45}
46#ifdef weak_alias
47weak_alias (__strnlen, strnlen)
48#endif
49