1 /* $NetBSD: strnlen.c,v 1.2 2014/01/09 11:25:11 apb Exp $ */
2
3 /*-
4 * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #if HAVE_NBTOOL_CONFIG_H
30 #include "nbtool_config.h"
31 #endif
32
33 #include <sys/cdefs.h>
34 #if defined(LIBC_SCCS) && !defined(lint)
35 __RCSID("$NetBSD: strnlen.c,v 1.2 2014/01/09 11:25:11 apb Exp $");
36 #endif /* LIBC_SCCS and not lint */
37 /* FreeBSD: src/lib/libc/string/strnlen.c,v 1.1 2009/02/28 06:00:58 das Exp */
38
39 #if !defined(_KERNEL) && !defined(_STANDALONE)
40 #include <string.h>
41 #else
42 #include <lib/libkern/libkern.h>
43 #endif
44
45 #if !HAVE_STRNLEN
46 size_t
strnlen(const char * s,size_t maxlen)47 strnlen(const char *s, size_t maxlen)
48 {
49 size_t len;
50
51 for (len = 0; len < maxlen; len++, s++) {
52 if (!*s)
53 break;
54 }
55 return (len);
56 }
57 #endif /* !HAVE_STRNLEN */
58