1/* Find the length of STRING, but scan at most MAXLEN characters.
2   Copyright (C) 2005-2007, 2009-2012 Free Software Foundation, Inc.
3   Written by Simon Josefsson.
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 3, 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
16   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20#include <string.h>
21
22/* Find the length of STRING, but scan at most MAXLEN characters.
23   If no '\0' terminator is found in that many characters, return MAXLEN.  */
24
25size_t
26strnlen (const char *string, size_t maxlen)
27{
28  const char *end = memchr (string, '\0', maxlen);
29  return end ? (size_t) (end - string) : maxlen;
30}
31