1 /* Find the length of STRING + 1, but scan at most MAXLEN bytes.
2 Copyright (C) 2005 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Library General Public License as published
6 by the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17 USA. */
18 #include <sys/cdefs.h>
19 __RCSID("$NetBSD: strnlen1.c,v 1.2 2016/05/17 14:00:09 christos Exp $");
20
21
22 #ifdef HAVE_CONFIG_H
23 # include <config.h>
24 #endif
25
26 /* Specification. */
27 #include "strnlen1.h"
28
29 #include <string.h>
30
31 /* Find the length of STRING + 1, but scan at most MAXLEN bytes.
32 If no '\0' terminator is found in that many characters, return MAXLEN. */
33 /* This is the same as strnlen (string, maxlen - 1) + 1. */
34 size_t
strnlen1(const char * string,size_t maxlen)35 strnlen1 (const char *string, size_t maxlen)
36 {
37 const char *end = memchr (string, '\0', maxlen);
38 if (end != NULL)
39 return end - string + 1;
40 else
41 return maxlen;
42 }
43