libs/strncasecmp.c

   1 /* This program is free software; you can redistribute it and/or modify
   2  * it under the terms of the GNU General Public License as published by
   3  * the Free Software Foundation; either version 2 of the License, or
   4  * (at your option) any later version.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  14  */
  15
  16
  17 int strncasecmp(register char *s1,register char *s2,register int n)
  18 {
  19   while ((--n > 0) && (tolower(*s1) == tolower(*s2)))
  20   {
  21     ++s1;
  22     ++s2;
  23     if (!*s1 || !*s2)
  24       break;
  25   }
  26   return (tolower(*s1) - tolower(*s2));
  27 }