1199767f8SToomas Soome /*-
2199767f8SToomas Soome * Copyright (c) 1990, 1993
3199767f8SToomas Soome * The Regents of the University of California. All rights reserved.
4199767f8SToomas Soome *
5199767f8SToomas Soome * This code is derived from software contributed to Berkeley by
6199767f8SToomas Soome * Chris Torek.
7199767f8SToomas Soome *
8199767f8SToomas Soome * Redistribution and use in source and binary forms, with or without
9199767f8SToomas Soome * modification, are permitted provided that the following conditions
10199767f8SToomas Soome * are met:
11199767f8SToomas Soome * 1. Redistributions of source code must retain the above copyright
12199767f8SToomas Soome * notice, this list of conditions and the following disclaimer.
13199767f8SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
14199767f8SToomas Soome * notice, this list of conditions and the following disclaimer in the
15199767f8SToomas Soome * documentation and/or other materials provided with the distribution.
16199767f8SToomas Soome * 3. Neither the name of the University nor the names of its contributors
17199767f8SToomas Soome * may be used to endorse or promote products derived from this software
18199767f8SToomas Soome * without specific prior written permission.
19199767f8SToomas Soome *
20199767f8SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21199767f8SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22199767f8SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23199767f8SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24199767f8SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25199767f8SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26199767f8SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27199767f8SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28199767f8SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29199767f8SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30199767f8SToomas Soome * SUCH DAMAGE.
31199767f8SToomas Soome */
32199767f8SToomas Soome
33199767f8SToomas Soome #if defined(LIBC_SCCS) && !defined(lint)
34199767f8SToomas Soome static char sccsid[] = "@(#)memcmp.c 8.1 (Berkeley) 6/4/93";
35199767f8SToomas Soome #endif /* LIBC_SCCS and not lint */
36199767f8SToomas Soome #include <sys/cdefs.h>
37199767f8SToomas Soome __FBSDID("$FreeBSD$");
38199767f8SToomas Soome
39199767f8SToomas Soome #include <string.h>
40199767f8SToomas Soome
41199767f8SToomas Soome /*
42199767f8SToomas Soome * Compare memory regions.
43199767f8SToomas Soome */
44199767f8SToomas Soome int
memcmp(const void * s1,const void * s2,size_t n)45199767f8SToomas Soome memcmp(const void *s1, const void *s2, size_t n)
46199767f8SToomas Soome {
47199767f8SToomas Soome if (n != 0) {
48199767f8SToomas Soome const unsigned char *p1 = s1, *p2 = s2;
49199767f8SToomas Soome
50199767f8SToomas Soome do {
51199767f8SToomas Soome if (*p1++ != *p2++)
52199767f8SToomas Soome return (*--p1 - *--p2);
53199767f8SToomas Soome } while (--n != 0);
54199767f8SToomas Soome }
55199767f8SToomas Soome return (0);
56199767f8SToomas Soome }
57