1*b5be37d2Sderaadt /* $OpenBSD: strcmp.c,v 1.11 2014/06/10 04:16:57 deraadt Exp $ */
2c3f6e9cfSniklas
3df930be7Sderaadt /*-
4df930be7Sderaadt * Copyright (c) 1990 The Regents of the University of California.
5df930be7Sderaadt * All rights reserved.
6df930be7Sderaadt *
7df930be7Sderaadt * This code is derived from software contributed to Berkeley by
8df930be7Sderaadt * Chris Torek.
9df930be7Sderaadt *
10df930be7Sderaadt * Redistribution and use in source and binary forms, with or without
11df930be7Sderaadt * modification, are permitted provided that the following conditions
12df930be7Sderaadt * are met:
13df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright
14df930be7Sderaadt * notice, this list of conditions and the following disclaimer.
15df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright
16df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the
17df930be7Sderaadt * documentation and/or other materials provided with the distribution.
1829295d1cSmillert * 3. Neither the name of the University nor the names of its contributors
19df930be7Sderaadt * may be used to endorse or promote products derived from this software
20df930be7Sderaadt * without specific prior written permission.
21df930be7Sderaadt *
22df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23df930be7Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24df930be7Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25df930be7Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26df930be7Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27df930be7Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28df930be7Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29df930be7Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30df930be7Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31df930be7Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32df930be7Sderaadt * SUCH DAMAGE.
33df930be7Sderaadt */
34df930be7Sderaadt
35cf4fa783Sderaadt #include <lib/libkern/libkern.h>
36df930be7Sderaadt
37df930be7Sderaadt /*
38df930be7Sderaadt * Compare strings.
39df930be7Sderaadt */
40df930be7Sderaadt int
strcmp(const char * s1,const char * s2)41a26aa419Sderaadt strcmp(const char *s1, const char *s2)
42df930be7Sderaadt {
43df930be7Sderaadt while (*s1 == *s2++)
44df930be7Sderaadt if (*s1++ == 0)
45df930be7Sderaadt return (0);
46f6a3c9b1Smickey return (*(unsigned char *)s1 - *(unsigned char *)--s2);
47df930be7Sderaadt }
48