1 /* Find the length of STRING, but scan at most MAXLEN characters.
2    Copyright (C) 2005-2007, 2009-2021 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 <https://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 
25 size_t
strnlen(const char * string,size_t maxlen)26 strnlen (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