10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*6812Sraf * Common Development and Distribution License (the "License").
6*6812Sraf * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
211219Sraf
22*6812Sraf /*
23*6812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24*6812Sraf * Use is subject to license terms.
25*6812Sraf */
26*6812Sraf
270Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
280Sstevel@tonic-gate /* All Rights Reserved */
290Sstevel@tonic-gate
300Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
310Sstevel@tonic-gate
320Sstevel@tonic-gate /*
330Sstevel@tonic-gate * NAME
340Sstevel@tonic-gate * casncmp - compare strings ignoring case
350Sstevel@tonic-gate *
360Sstevel@tonic-gate * SYNOPSIS
370Sstevel@tonic-gate * int casncmp(char *s1, char *s2, ssize_t n)
380Sstevel@tonic-gate *
390Sstevel@tonic-gate * DESCRIPTION
400Sstevel@tonic-gate * Compare two strings ignoring case differences.
410Sstevel@tonic-gate * Stop after n bytes or the trailing NUL.
420Sstevel@tonic-gate */
430Sstevel@tonic-gate
440Sstevel@tonic-gate #include "libmail.h"
450Sstevel@tonic-gate #include <ctype.h>
460Sstevel@tonic-gate #include <sys/types.h>
470Sstevel@tonic-gate
480Sstevel@tonic-gate int
casncmp(char * s1,char * s2,ssize_t n)490Sstevel@tonic-gate casncmp(char *s1, char *s2, ssize_t n)
500Sstevel@tonic-gate {
510Sstevel@tonic-gate if (s1 == s2)
520Sstevel@tonic-gate return (0);
530Sstevel@tonic-gate while ((--n >= 0) && (tolower(*s1) == tolower(*s2))) {
540Sstevel@tonic-gate s2++;
550Sstevel@tonic-gate if (*s1++ == '\0')
560Sstevel@tonic-gate return (0);
570Sstevel@tonic-gate }
580Sstevel@tonic-gate return ((n < 0)? 0: (*s1 - *s2));
590Sstevel@tonic-gate }
60