strstr.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* 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
* 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) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include <string.h>
#include <stddef.h>
/*
* strstr() locates the first occurrence in the string as1 of
* the sequence of characters (excluding the terminating null
* character) in the string as2. strstr() returns a pointer
* to the located string, or a null pointer if the string is
* not found. If as2 is "", the function returns as1.
*/
char *
{
const char *tptr;
char c;
return ((char *)s1);
c = *s2;
while (*s1)
if (*s1++ == c) {
;
if (c == 0)
return ((char *)tptr - 1);
c = *s2;
}
return (NULL);
}