xref: /freebsd/lib/libc/string/wmemcmp.c (revision aa339f1d5df9e38f36a34eb522355c4eebcae6c4)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c)1999 Citrus Project,
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  *	citrus Id: wmemcmp.c,v 1.2 2000/12/20 14:08:31 itojun Exp
29  */
30 
31 #include <sys/cdefs.h>
32 #if 0
33 #if defined(LIBC_SCCS) && !defined(lint)
34 __RCSID("$NetBSD: wmemcmp.c,v 1.1 2000/12/23 23:14:37 itojun Exp $");
35 #endif /* LIBC_SCCS and not lint */
36 #endif
37 #include <wchar.h>
38 
39 int
40 wmemcmp(const wchar_t *s1, const wchar_t *s2, size_t n)
41 {
42 	size_t i;
43 
44 	for (i = 0; i < n; i++) {
45 		if (*s1 != *s2) {
46 			/* wchar might be unsigned */
47 			return *s1 > *s2 ? 1 : -1;
48 		}
49 		s1++;
50 		s2++;
51 	}
52 	return 0;
53 }
54