/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1986 AT&T */
/*        All Rights Reserved   */

/*
 * Returns a pointer to the first occurrnce of ws1 in ws2.
 */

#pragma weak _wcswcs = wcswcs

#include "lint.h"
#include <stdlib.h>

wchar_t *
wcswcs(const wchar_t *ws1, const wchar_t *ws2)
{
        const wchar_t *s1, *s2;
        const wchar_t *tptr;
        wchar_t c;

        s1 = ws1;
        s2 = ws2;

        if (s2 == NULL || *s2 == 0)
                return ((wchar_t *)s1);
        c = *s2;

        while (*s1)
                if (*s1++ == c) {
                        tptr = s1;
                        while ((c = *++s2) == *s1++ && c)
                                ;
                        if (c == 0)
                                return ((wchar_t *)tptr - 1);
                        s1 = tptr;
                        s2 = ws2;
                        c = *s2;
                }
        return (NULL);
}