/*
* 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"
/*
* NAME
* casncmp - compare strings ignoring case
*
* SYNOPSIS
* int casncmp(char *s1, char *s2, ssize_t n)
*
* DESCRIPTION
* Compare two strings ignoring case differences.
* Stop after n bytes or the trailing NUL.
*/
#include "libmail.h"
#include <ctype.h>
#include <sys/types.h>
int
casncmp(char *s1, char *s2, ssize_t n)
{
if (s1 == s2)
return (0);
while ((--n >= 0) && (tolower(*s1) == tolower(*s2))) {
s2++;
if (*s1++ == '\0')
return (0);
}
return ((n < 0)? 0: (*s1 - *s2));
}