wcsmbs/wcslen.c

   1 /* Copyright (C) 1995-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <wchar.h>
  20
  21 /* Return length of string S.  */
  22 #ifdef WCSLEN
  23 # define __wcslen WCSLEN
  24 #endif
  25
  26 size_t
  27 __wcslen (const wchar_t *s)
  28 {
  29   size_t len = 0;
  30
  31   while (s[len] != L'\0')
  32     {
  33       if (s[++len] == L'\0')
  34         return len;
  35       if (s[++len] == L'\0')
  36         return len;
  37       if (s[++len] == L'\0')
  38         return len;
  39       ++len;
  40     }
  41
  42   return len;
  43 }
  44 #ifndef WCSLEN
  45 weak_alias (__wcslen, wcslen)
  46 #endif