xref: /rk3399_ARM-atf/lib/libc/strnlen.c (revision c6fdaa73633cae03e23ee62d55e2bd608bb4535c)
1*c6fdaa73SAntonio Nino Diaz /*-
2*c6fdaa73SAntonio Nino Diaz  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3*c6fdaa73SAntonio Nino Diaz  *
4*c6fdaa73SAntonio Nino Diaz  * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
5*c6fdaa73SAntonio Nino Diaz  * All rights reserved.
6*c6fdaa73SAntonio Nino Diaz  *
7*c6fdaa73SAntonio Nino Diaz  * Redistribution and use in source and binary forms, with or without
8*c6fdaa73SAntonio Nino Diaz  * modification, are permitted provided that the following conditions
9*c6fdaa73SAntonio Nino Diaz  * are met:
10*c6fdaa73SAntonio Nino Diaz  * 1. Redistributions of source code must retain the above copyright
11*c6fdaa73SAntonio Nino Diaz  *    notice, this list of conditions and the following disclaimer.
12*c6fdaa73SAntonio Nino Diaz  * 2. Redistributions in binary form must reproduce the above copyright
13*c6fdaa73SAntonio Nino Diaz  *    notice, this list of conditions and the following disclaimer in the
14*c6fdaa73SAntonio Nino Diaz  *    documentation and/or other materials provided with the distribution.
15*c6fdaa73SAntonio Nino Diaz  *
16*c6fdaa73SAntonio Nino Diaz  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17*c6fdaa73SAntonio Nino Diaz  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18*c6fdaa73SAntonio Nino Diaz  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19*c6fdaa73SAntonio Nino Diaz  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20*c6fdaa73SAntonio Nino Diaz  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21*c6fdaa73SAntonio Nino Diaz  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22*c6fdaa73SAntonio Nino Diaz  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23*c6fdaa73SAntonio Nino Diaz  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24*c6fdaa73SAntonio Nino Diaz  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25*c6fdaa73SAntonio Nino Diaz  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*c6fdaa73SAntonio Nino Diaz  * SUCH DAMAGE.
27*c6fdaa73SAntonio Nino Diaz  */
28*c6fdaa73SAntonio Nino Diaz 
29*c6fdaa73SAntonio Nino Diaz #include <sys/cdefs.h>
30*c6fdaa73SAntonio Nino Diaz __FBSDID("$FreeBSD$");
31*c6fdaa73SAntonio Nino Diaz 
32*c6fdaa73SAntonio Nino Diaz #include <string.h>
33*c6fdaa73SAntonio Nino Diaz 
34*c6fdaa73SAntonio Nino Diaz size_t
35*c6fdaa73SAntonio Nino Diaz strnlen(const char *s, size_t maxlen)
36*c6fdaa73SAntonio Nino Diaz {
37*c6fdaa73SAntonio Nino Diaz 	size_t len;
38*c6fdaa73SAntonio Nino Diaz 
39*c6fdaa73SAntonio Nino Diaz 	for (len = 0; len < maxlen; len++, s++) {
40*c6fdaa73SAntonio Nino Diaz 		if (!*s)
41*c6fdaa73SAntonio Nino Diaz 			break;
42*c6fdaa73SAntonio Nino Diaz 	}
43*c6fdaa73SAntonio Nino Diaz 	return (len);
44*c6fdaa73SAntonio Nino Diaz }
45