wscasecmp.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Compare strings ignoring case difference.
* returns: s1>s2: >0 s1==s2: 0 s1<s2: <0
* All letters are converted to the lowercase and compared.
*/
#pragma weak wscasecmp = _wscasecmp
#include "lint.h"
#include <stdlib.h>
#include <widec.h>
#include "libc.h"
int
_wscasecmp(const wchar_t *s1, const wchar_t *s2)
{
if (s1 == s2)
return (0);
while (_towlower(*s1) == _towlower(*s2++))
if (*s1++ == 0)
return (0);
return (_towlower(*s1) - _towlower(*(s2 - 1)));
}