/* Copyright (C) 1998-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <wchar.h>

#ifdef WCSNLEN

# define __wcsnlen WCSNLEN

#endif

/* Return length of string S at most maxlen.  */

size_t

__wcsnlen (const wchar_t *s, size_t maxlen)

{

  size_t len = 0;

  while (maxlen > 0 && s[len] != L'\0')

    {

      ++len;

      if (--maxlen == 0 || s[len] == L'\0')

	return len;

      ++len;

      if (--maxlen == 0 || s[len] == L'\0')

	return len;

      ++len;

      if (--maxlen == 0 || s[len] == L'\0')

	return len;

      ++len;

      --maxlen;

    }

  return len;

}

#ifndef WCSNLEN

weak_alias (__wcsnlen, wcsnlen)

#endif