xref: /illumos-gate/usr/src/lib/libc/port/i18n/wsncmp.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*	Copyright (c) 1986 AT&T	*/
30 /*	  All Rights Reserved  	*/
31 
32 
33 /*	This module is created for NLS on Sep.03.86		*/
34 
35 /*
36  * Compare strings (at most n characters)
37  * 	returns:  s1>s2: >0  s1==s2: 0  s1<s2: <0
38  */
39 
40 #pragma weak wcsncmp = _wcsncmp
41 #pragma weak wsncmp = _wsncmp
42 
43 #include "lint.h"
44 #include <stdlib.h>
45 #include <wchar.h>
46 
47 int
48 _wcsncmp(const wchar_t *s1, const wchar_t *s2, size_t n)
49 {
50 	if (s1 == s2)
51 		return (0);
52 
53 	n++;
54 	while (--n > 0 && *s1 == *s2++)
55 		if (*s1++ == 0)
56 			return (0);
57 	return ((n == 0) ? 0 : (*s1 - *(s2 - 1)));
58 }
59 
60 int
61 _wsncmp(const wchar_t *s1, const wchar_t *s2, size_t n)
62 {
63 	return (_wcsncmp(s1, s2, n));
64 }
65