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#include "lint.h"
30#include <sys/types.h>
31#include <wchar.h>
32#include "libc.h"
33
34wchar_t *
35wcsstr(const wchar_t *ws1, const wchar_t *ws2)
36{
37	const wchar_t	*os1, *os2;
38	const wchar_t	*tptr;
39	wchar_t	c;
40
41	os1 = ws1;
42	os2 = ws2;
43
44	if (os1 == NULL || *os2 == L'\0')
45		return ((wchar_t *)os1);
46	c = *os2;
47
48	while (*os1)
49		if (*os1++ == c) {
50			tptr = os1;
51			while (((c = *++os2) == *os1++) && (c != L'\0'))
52				;
53			if (c == L'\0')
54				return ((wchar_t *)tptr - 1);
55			os1 = tptr;
56			os2 = ws2;
57			c = *os2;
58		}
59	return (NULL);
60}
61