/*      $NetBSD: strcasecmp.c,v 1.3 2018/08/11 16:25:32 christos 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.
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)strcasecmp.c        8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: strcasecmp.c,v 1.3 2018/08/11 16:25:32 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#if !defined(_KERNEL) && !defined(_STANDALONE)
#include "namespace.h"
#include <assert.h>
#include <ctype.h>
#include <string.h>
#ifdef __weak_alias
__weak_alias(strcasecmp,_strcasecmp)
__weak_alias(strncasecmp,_strncasecmp)
#endif
#else
#include <lib/libkern/libkern.h>
#include <machine/limits.h>
#endif

int
strcasecmp(const char *s1, const char *s2)
{
       const unsigned char *us1 = (const unsigned char *)s1,
                       *us2 = (const unsigned char *)s2;

       _DIAGASSERT(s1 != NULL);
       _DIAGASSERT(s2 != NULL);

       while (tolower(*us1) == tolower(*us2++))
               if (*us1++ == '\0')
                       return (0);
       return (tolower(*us1) - tolower(*--us2));
}