strstr.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"
/*
* Get matching substring
*/
#include <string.h>
#pragma weak strstr = _strstr
char *
_strstr(s1, s2)
register char *s1, *s2;
{
int s2len = strlen(s2); /* length of the second string */
/*
* If the length of the second string is 0,
* return the first argument.
*/
if (s2len == 0)
return (s1);
while (strlen(s1) >= s2len) {
if (strncmp(s1, s2, s2len) == 0)
return (s1);
s1++;
}
return (0);
}