wcsncmp.c revision 86170 
1132718Skan/*
250397Sobrien * Copyright (c) 1989, 1993
3132718Skan *	The Regents of the University of California.  All rights reserved.
4132718Skan *
550397Sobrien * Redistribution and use in source and binary forms, with or without
6132718Skan * modification, are permitted provided that the following conditions
750397Sobrien * are met:
8132718Skan * 1. Redistributions of source code must retain the above copyright
9132718Skan *    notice, this list of conditions and the following disclaimer.
10132718Skan * 2. Redistributions in binary form must reproduce the above copyright
11132718Skan *    notice, this list of conditions and the following disclaimer in the
1250397Sobrien *    documentation and/or other materials provided with the distribution.
13132718Skan * 3. All advertising materials mentioning features or use of this software
14132718Skan *    must display the following acknowledgement:
15132718Skan *	This product includes software developed by the University of
16132718Skan *	California, Berkeley and its contributors.
1750397Sobrien * 4. Neither the name of the University nor the names of its contributors
1850397Sobrien *    may be used to endorse or promote products derived from this software
19132718Skan *    without specific prior written permission.
20169689Skan *
21169689Skan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2250397Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2390075Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2450397Sobrien * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2550397Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2650397Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27132718Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28132718Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29132718Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30169689Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31169689Skan * SUCH DAMAGE.
32169689Skan */
33169689Skan
34169689Skan#include <sys/cdefs.h>
35169689Skan#if defined(LIBC_SCCS) && !defined(lint)
36169689Skanstatic char sccsid[] = "@(#)strncmp.c	8.1 (Berkeley) 6/4/93";
37__RCSID("$NetBSD$");
38#endif /* LIBC_SCCS and not lint */
39__FBSDID("$FreeBSD: head/lib/libc/string/wcsncmp.c 86170 2001-11-07 19:55:16Z obrien $");
40
41#include <assert.h>
42#include <wchar.h>
43
44int
45wcsncmp(s1, s2, n)
46	const wchar_t *s1, *s2;
47	size_t n;
48{
49
50	if (n == 0)
51		return (0);
52	do {
53		if (*s1 != *s2++) {
54			/* XXX assumes wchar_t = int */
55			return (*(const unsigned int *)s1 -
56			    *(const unsigned int *)--s2);
57		}
58		if (*s1++ == 0)
59			break;
60	} while (--n != 0);
61	return (0);
62}
63