/* Copyright (C) 1996-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.

   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 WMEMCHR

# define __wmemchr WMEMCHR

#endif

wchar_t *

__wmemchr (const wchar_t *s, wchar_t c, size_t n)

{

  /* For performance reasons unfold the loop four times.  */

  while (n >= 4)

    {

      if (s[0] == c)

	return (wchar_t *) s;

      if (s[1] == c)

	return (wchar_t *) &s[1];

      if (s[2] == c)

	return (wchar_t *) &s[2];

      if (s[3] == c)

	return (wchar_t *) &s[3];

      s += 4;

      n -= 4;

    }

  if (n > 0)

    {

      if (*s == c)

	return (wchar_t *) s;

      ++s;

      --n;

    }

  if (n > 0)

    {

      if (*s == c)

	return (wchar_t *) s;

      ++s;

      --n;

    }

  if (n > 0)

    if (*s == c)

      return (wchar_t *) s;

  return NULL;

}

libc_hidden_def (__wmemchr)

weak_alias (__wmemchr, wmemchr)

libc_hidden_weak (wmemchr)