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/*        $NetBSD: strcasecmp.c,v 1.16 2003/08/07 16:43:49 agc Exp $        */

/*

 * Copyright (c) 1987, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include <sys/cdefs.h>

#include <ctype.h>

#include <string.h>

int

strcasecmp(s1, s2)

        const char *s1, *s2;

{

        const unsigned char *us1 = (const unsigned char *)s1,

                        *us2 = (const unsigned char *)s2;

        while (tolower(*us1) == tolower(*us2++))

                if (*us1++ == '\0')

                        return (0);

        return (tolower(*us1) - tolower(*--us2));

}

int

strncasecmp(s1, s2, n)

        const char *s1, *s2;

        size_t n;

{

        if (s1 == NULL || s2 == NULL)

                return (0);

        if (n != 0) {

                const unsigned char *us1 = (const unsigned char *)s1,

                                *us2 = (const unsigned char *)s2;

                do {

                        if (tolower(*us1) != tolower(*us2++))

                                return (tolower(*us1) - tolower(*--us2));

                        if (*us1++ == '\0')

                                break;

                } while (--n != 0);

        }

        return (0);

}