substr.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
* 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) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include "libmail.h"
/*
* This routine looks for string2 in string1.
* If found, it returns the position string2 is found at,
* otherwise it returns a -1.
*/
int
substr(char *string1, char *string2)
{
int i, j, len1, len2;
/* the size of the substring will always fit into an int */
/*LINTED*/
len1 = (int)strlen(string1);
/*LINTED*/
len2 = (int)strlen(string2);
for (i = 0; i < len1 - len2 + 1; i++) {
for (j = 0; j < len2 && string1[i+j] == string2[j]; j++)
continue;
if (j == len2)
return (i);
}
return (-1);
}