1*ef5ccd6cSJohn Marino /* Find the length of STRING + 1, but scan at most MAXLEN bytes.
2*ef5ccd6cSJohn Marino Copyright (C) 2005-2006, 2009-2012 Free Software Foundation, Inc.
3*ef5ccd6cSJohn Marino
4*ef5ccd6cSJohn Marino This program is free software: you can redistribute it and/or modify
5*ef5ccd6cSJohn Marino it under the terms of the GNU General Public License as published by
6*ef5ccd6cSJohn Marino the Free Software Foundation; either version 3 of the License, or
7*ef5ccd6cSJohn Marino (at your option) any later version.
8*ef5ccd6cSJohn Marino
9*ef5ccd6cSJohn Marino This program is distributed in the hope that it will be useful,
10*ef5ccd6cSJohn Marino but WITHOUT ANY WARRANTY; without even the implied warranty of
11*ef5ccd6cSJohn Marino MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12*ef5ccd6cSJohn Marino GNU General Public License for more details.
13*ef5ccd6cSJohn Marino
14*ef5ccd6cSJohn Marino You should have received a copy of the GNU General Public License
15*ef5ccd6cSJohn Marino along with this program. If not, see <http://www.gnu.org/licenses/>. */
16*ef5ccd6cSJohn Marino
17*ef5ccd6cSJohn Marino #include <config.h>
18*ef5ccd6cSJohn Marino
19*ef5ccd6cSJohn Marino /* Specification. */
20*ef5ccd6cSJohn Marino #include "strnlen1.h"
21*ef5ccd6cSJohn Marino
22*ef5ccd6cSJohn Marino #include <string.h>
23*ef5ccd6cSJohn Marino
24*ef5ccd6cSJohn Marino /* Find the length of STRING + 1, but scan at most MAXLEN bytes.
25*ef5ccd6cSJohn Marino If no '\0' terminator is found in that many characters, return MAXLEN. */
26*ef5ccd6cSJohn Marino /* This is the same as strnlen (string, maxlen - 1) + 1. */
27*ef5ccd6cSJohn Marino size_t
strnlen1(const char * string,size_t maxlen)28*ef5ccd6cSJohn Marino strnlen1 (const char *string, size_t maxlen)
29*ef5ccd6cSJohn Marino {
30*ef5ccd6cSJohn Marino const char *end = (const char *) memchr (string, '\0', maxlen);
31*ef5ccd6cSJohn Marino if (end != NULL)
32*ef5ccd6cSJohn Marino return end - string + 1;
33*ef5ccd6cSJohn Marino else
34*ef5ccd6cSJohn Marino return maxlen;
35*ef5ccd6cSJohn Marino }
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