wcsmbs/wcslen.c

   1 /* Copyright (C) 1995, 1996, 1997, 1998, 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 /* Return length of string S.  */
  23 #ifdef WCSLEN
  24 # define __wcslen WCSLEN
  25 #endif
  26
  27 size_t
  28 __wcslen (s)
  29      const wchar_t *s;
  30 {
  31   size_t len = 0;
  32
  33   while (s[len] != L'\0')
  34     {
  35       if (s[++len] == L'\0')
  36         return len;
  37       if (s[++len] == L'\0')
  38         return len;
  39       if (s[++len] == L'\0')
  40         return len;
  41       ++len;
  42     }
  43
  44   return len;
  45 }
  46 #ifndef WCSLEN
  47 weak_alias (__wcslen, wcslen)
  48 #endif