wcsstr.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"
#include "lint.h"
#include <sys/types.h>
#include <wchar.h>
#include "libc.h"
wchar_t *
wcsstr(const wchar_t *ws1, const wchar_t *ws2)
{
const wchar_t *os1, *os2;
const wchar_t *tptr;
wchar_t c;
os1 = ws1;
os2 = ws2;
if (os1 == NULL || *os2 == L'\0')
return ((wchar_t *)os1);
c = *os2;
while (*os1)
if (*os1++ == c) {
tptr = os1;
while (((c = *++os2) == *os1++) && (c != L'\0'))
;
if (c == L'\0')
return ((wchar_t *)tptr - 1);
os1 = tptr;
os2 = ws2;
c = *os2;
}
return (NULL);
}