1  /* Copyright (C) 1998-2023 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  #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