wcsmbs/wcscmp.c

   1 /* Copyright (C) 1995, 1996, 1997, 2011 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <wchar.h>
  21
  22 #ifndef WCSCMP
  23 # define WCSCMP wcscmp
  24 #endif
  25
  26 /* Compare S1 and S2, returning less than, equal to or
  27    greater than zero if S1 is lexicographically less than,
  28    equal to or greater than S2.  */
  29 int
  30 WCSCMP (s1, s2)
  31      const wchar_t *s1;
  32      const wchar_t *s2;
  33 {
  34   wchar_t c1, c2;
  35
  36   do
  37     {
  38       c1 = *s1++;
  39       c2 = *s2++;
  40       if (c2 == L'\0')
  41         return c1 - c2;
  42     }
  43   while (c1 == c2);
  44
  45   return c1 < c2 ? -1 : 1;
  46 }
  47 libc_hidden_def (WCSCMP)