strcasecmp.c

/*****************************************************************************
 * strcasecmp.c: POSIX strcasecmp() replacement
 *****************************************************************************
 * Copyright © 1998-2008 VLC authors and VideoLAN
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <string.h>
#include <ctype.h>
#include <assert.h>

int strcasecmp (const char *s1, const char *s2)
{
#ifdef _WIN32
    return _stricmp (s1, s2);
#else
    for (size_t i = 0;; i++)
    {
        unsigned char c1 = s1[i], c2 = s2[i];
        int d = tolower (c1) - tolower (c2);
        if (d || !c1)
            return d;
        assert (c2);
    }
#endif
}