xref: /titanic_52/usr/src/lib/libmail/common/substr.c (revision 7257d1b4d25bfac0c802847390e98a464fd787ac)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7257d1b4Sraf  * Common Development and Distribution License (the "License").
6*7257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
21e8031f0aSraf 
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24e8031f0aSraf  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
27*7257d1b4Sraf /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28*7257d1b4Sraf /*	  All Rights Reserved  	*/
297c478bd9Sstevel@tonic-gate 
30*7257d1b4Sraf #pragma ident	"%Z%%M%	%I%	%E% SMI"
31*7257d1b4Sraf 
327c478bd9Sstevel@tonic-gate #include <sys/types.h>
337c478bd9Sstevel@tonic-gate #include "libmail.h"
347c478bd9Sstevel@tonic-gate 
357c478bd9Sstevel@tonic-gate /*
367c478bd9Sstevel@tonic-gate  *	This routine looks for string2 in string1.
377c478bd9Sstevel@tonic-gate  *	If found, it returns the position string2 is found at,
387c478bd9Sstevel@tonic-gate  *	otherwise it returns a -1.
397c478bd9Sstevel@tonic-gate  */
407c478bd9Sstevel@tonic-gate int
417c478bd9Sstevel@tonic-gate substr(char *string1, char *string2)
427c478bd9Sstevel@tonic-gate {
437c478bd9Sstevel@tonic-gate 	int i, j, len1, len2;
447c478bd9Sstevel@tonic-gate 
457c478bd9Sstevel@tonic-gate 	/* the size of the substring will always fit into an int */
467c478bd9Sstevel@tonic-gate 	/*LINTED*/
477c478bd9Sstevel@tonic-gate 	len1 = (int)strlen(string1);
487c478bd9Sstevel@tonic-gate 	/*LINTED*/
497c478bd9Sstevel@tonic-gate 	len2 = (int)strlen(string2);
507c478bd9Sstevel@tonic-gate 	for (i = 0; i < len1 - len2 + 1; i++) {
51*7257d1b4Sraf 		for (j = 0; j < len2 && string1[i+j] == string2[j]; j++)
52*7257d1b4Sraf 			continue;
537c478bd9Sstevel@tonic-gate 		if (j == len2)
547c478bd9Sstevel@tonic-gate 			return (i);
557c478bd9Sstevel@tonic-gate 	}
567c478bd9Sstevel@tonic-gate 	return (-1);
577c478bd9Sstevel@tonic-gate }
58