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 
19 #ifdef HAVE_CONFIG_H
20 # include <config.h>
21 #endif
22 
23 /* Specification.  */
24 #include "strnlen1.h"
25 
26 #include <string.h>
27 
28 /* Find the length of STRING + 1, but scan at most MAXLEN bytes.
29    If no '\0' terminator is found in that many characters, return MAXLEN.  */
30 /* This is the same as strnlen (string, maxlen - 1) + 1.  */
31 size_t
strnlen1(const char * string,size_t maxlen)32 strnlen1 (const char *string, size_t maxlen)
33 {
34   const char *end = memchr (string, '\0', maxlen);
35   if (end != NULL)
36     return end - string + 1;
37   else
38     return maxlen;
39 }
40