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wcsncmp.c revision 1.7 
      1  1.7   tnozaki /*	$NetBSD: wcsncmp.c,v 1.7 2009/01/05 06:11:43 tnozaki Exp $	*/
      2  1.1    itojun 
      3  1.3    itojun /*
      4  1.3    itojun  * Copyright (c) 1989, 1993
      5  1.3    itojun  *	The Regents of the University of California.  All rights reserved.
      6  1.1    itojun  *
      7  1.1    itojun  * Redistribution and use in source and binary forms, with or without
      8  1.1    itojun  * modification, are permitted provided that the following conditions
      9  1.1    itojun  * are met:
     10  1.1    itojun  * 1. Redistributions of source code must retain the above copyright
     11  1.1    itojun  *    notice, this list of conditions and the following disclaimer.
     12  1.1    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1    itojun  *    notice, this list of conditions and the following disclaimer in the
     14  1.1    itojun  *    documentation and/or other materials provided with the distribution.
     15  1.5       agc  * 3. Neither the name of the University nor the names of its contributors
     16  1.3    itojun  *    may be used to endorse or promote products derived from this software
     17  1.3    itojun  *    without specific prior written permission.
     18  1.1    itojun  *
     19  1.3    itojun  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  1.1    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  1.1    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  1.3    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  1.1    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  1.1    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  1.1    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  1.1    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  1.1    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  1.1    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  1.1    itojun  * SUCH DAMAGE.
     30  1.1    itojun  */
     31  1.1    itojun 
     32  1.1    itojun #include <sys/cdefs.h>
     33  1.1    itojun #if defined(LIBC_SCCS) && !defined(lint)
     34  1.3    itojun #if 0
     35  1.3    itojun static char sccsid[] = "@(#)strncmp.c	8.1 (Berkeley) 6/4/93";
     36  1.3    itojun #else
     37  1.7   tnozaki __RCSID("$NetBSD: wcsncmp.c,v 1.7 2009/01/05 06:11:43 tnozaki Exp $");
     38  1.3    itojun #endif
     39  1.1    itojun #endif /* LIBC_SCCS and not lint */
     40  1.1    itojun 
     41  1.2     lukem #include <assert.h>
     42  1.1    itojun #include <wchar.h>
     43  1.7   tnozaki #include "runetype_local.h"
     44  1.1    itojun 
     45  1.1    itojun int
     46  1.1    itojun wcsncmp(s1, s2, n)
     47  1.3    itojun 	const wchar_t *s1, *s2;
     48  1.1    itojun 	size_t n;
     49  1.1    itojun {
     50  1.3    itojun 
     51  1.2     lukem 	_DIAGASSERT(s1 != NULL);
     52  1.2     lukem 	_DIAGASSERT(s2 != NULL);
     53  1.2     lukem 
     54  1.3    itojun 	if (n == 0)
     55  1.3    itojun 		return (0);
     56  1.3    itojun 	do {
     57  1.3    itojun 		if (*s1 != *s2++) {
     58  1.3    itojun 			/* XXX assumes wchar_t = int */
     59  1.4  tshiozak 			return (*(const __nbrune_t *)s1 -
     60  1.4  tshiozak 			    *(const __nbrune_t *)--s2);
     61  1.3    itojun 		}
     62  1.3    itojun 		if (*s1++ == 0)
     63  1.3    itojun 			break;
     64  1.3    itojun 	} while (--n != 0);
     65  1.3    itojun 	return (0);
     66  1.1    itojun }
     67