xref: /titanic_41/usr/src/lib/libc/port/i18n/wcswcs.c (revision 7257d1b4d25bfac0c802847390e98a464fd787ac)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7257d1b4Sraf  * Common Development and Distribution License (the "License").
6*7257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
21*7257d1b4Sraf 
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1986 AT&T	*/
287c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
297c478bd9Sstevel@tonic-gate 
30*7257d1b4Sraf #pragma ident	"%Z%%M%	%I%	%E% SMI"
317c478bd9Sstevel@tonic-gate 
327c478bd9Sstevel@tonic-gate /*
337c478bd9Sstevel@tonic-gate  * Returns a pointer to the first occurrnce of ws1 in ws2.
347c478bd9Sstevel@tonic-gate  */
357c478bd9Sstevel@tonic-gate 
36*7257d1b4Sraf #pragma weak _wcswcs = wcswcs
377c478bd9Sstevel@tonic-gate 
387c478bd9Sstevel@tonic-gate #include "lint.h"
397c478bd9Sstevel@tonic-gate #include <stdlib.h>
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate wchar_t *
wcswcs(const wchar_t * ws1,const wchar_t * ws2)42*7257d1b4Sraf wcswcs(const wchar_t *ws1, const wchar_t *ws2)
437c478bd9Sstevel@tonic-gate {
447c478bd9Sstevel@tonic-gate 	const wchar_t *s1, *s2;
457c478bd9Sstevel@tonic-gate 	const wchar_t *tptr;
467c478bd9Sstevel@tonic-gate 	wchar_t c;
477c478bd9Sstevel@tonic-gate 
487c478bd9Sstevel@tonic-gate 	s1 = ws1;
497c478bd9Sstevel@tonic-gate 	s2 = ws2;
507c478bd9Sstevel@tonic-gate 
517c478bd9Sstevel@tonic-gate 	if (s2 == NULL || *s2 == 0)
527c478bd9Sstevel@tonic-gate 		return ((wchar_t *)s1);
537c478bd9Sstevel@tonic-gate 	c = *s2;
547c478bd9Sstevel@tonic-gate 
557c478bd9Sstevel@tonic-gate 	while (*s1)
567c478bd9Sstevel@tonic-gate 		if (*s1++ == c) {
577c478bd9Sstevel@tonic-gate 			tptr = s1;
587c478bd9Sstevel@tonic-gate 			while ((c = *++s2) == *s1++ && c)
597c478bd9Sstevel@tonic-gate 				;
607c478bd9Sstevel@tonic-gate 			if (c == 0)
617c478bd9Sstevel@tonic-gate 				return ((wchar_t *)tptr - 1);
627c478bd9Sstevel@tonic-gate 			s1 = tptr;
637c478bd9Sstevel@tonic-gate 			s2 = ws2;
647c478bd9Sstevel@tonic-gate 			c = *s2;
657c478bd9Sstevel@tonic-gate 		}
667c478bd9Sstevel@tonic-gate 	return (NULL);
677c478bd9Sstevel@tonic-gate }
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