wcsmbs/wcslen.c

   1 /* Copyright (C) 1995-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <wchar.h>
  19
  20 /* Return length of string S.  */
  21 #ifdef WCSLEN
  22 # define __wcslen WCSLEN
  23 #endif
  24
  25 size_t
  26 __wcslen (const wchar_t *s)
  27 {
  28   size_t len = 0;
  29
  30   while (s[len] != L'\0')
  31     {
  32       if (s[++len] == L'\0')
  33         return len;
  34       if (s[++len] == L'\0')
  35         return len;
  36       if (s[++len] == L'\0')
  37         return len;
  38       ++len;
  39     }
  40
  41   return len;
  42 }
  43 #ifndef WCSLEN
  44 weak_alias (__wcslen, wcslen)
  45 #endif