compat/strncasecmp.c

   1 /*****************************************************************************
   2  * strncasecmp.c: POSIX strncasecmp() replacement
   3  *****************************************************************************
   4  * Copyright © 1998-2009 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <string.h>
  26 #include <ctype.h>
  27 #include <assert.h>
  28
  29 int strncasecmp (const char *s1, const char *s2)
  30 {
  31 #ifdef HAVE_STRNICMP
  32     return strnicmp (s1, s2);
  33 #else
  34     for (size_t i = 0; i < n; i++)
  35     {
  36         unsigned char c1 = s1[i], c2 = s2[i];
  37         int d = tolower (c1) - tolower (c2);
  38         if (d || !c1)
  39             return d;
  40         assert (c2);
  41     }
  42     return 0;
  43 #endif
  44 }