wcsncmp.c revision 1.1 
1/*	$OpenBSD: wcsncmp.c,v 1.1 2005/04/13 16:35:58 espie Exp $	*/
2/*	$NetBSD: wcsncmp.c,v 1.5 2003/08/07 16:43:54 agc Exp $	*/
3
4/*
5 * Copyright (c) 1989, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char *rcsid = "$OpenBSD: wcsncmp.c,v 1.1 2005/04/13 16:35:58 espie Exp $";
35#endif /* LIBC_SCCS and not lint */
36
37#include <wchar.h>
38#include "locale/runetype.h"
39
40int
41wcsncmp(s1, s2, n)
42	const wchar_t *s1, *s2;
43	size_t n;
44{
45
46	if (n == 0)
47		return (0);
48	do {
49		if (*s1 != *s2++) {
50			/* XXX assumes wchar_t = int */
51			return (*(const __nbrune_t *)s1 -
52			    *(const __nbrune_t *)--s2);
53		}
54		if (*s1++ == 0)
55			break;
56	} while (--n != 0);
57	return (0);
58}
59