wcsmbs/wcsnlen.c

   1 /* Copyright (C) 1998-2022 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 #ifdef WCSNLEN
  21 # define __wcsnlen WCSNLEN
  22 #endif
  23
  24 /* Return length of string S at most maxlen.  */
  25 size_t
  26 __wcsnlen (const wchar_t *s, size_t maxlen)
  27 {
  28   const wchar_t *ret = __wmemchr (s, L'\0', maxlen);
  29   if (ret)
  30     maxlen = ret - s;
  31   return maxlen;
  32 }
  33 #ifndef WCSNLEN
  34 weak_alias (__wcsnlen, wcsnlen)
  35 #endif