1 /* Find the length of STRING, but scan at most MAXLEN characters.
2 Copyright (C) 2005-2007, 2009-2023 Free Software Foundation, Inc.
3 Written by Simon Josefsson.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file 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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser 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
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 }