/* Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 <stdio_ext.h>

#include "libioP.h"

void

__fpurge (FILE *fp)

{

  if (fp->_mode > 0)

    {

      /* Wide-char stream.  */

      if (_IO_in_backup (fp))

	_IO_free_wbackup_area (fp);

      fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;

      fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;

    }

  else

    {

      /* Byte stream.  */

      if (_IO_in_backup (fp))

	_IO_free_backup_area (fp);

      fp->_IO_read_end = fp->_IO_read_ptr;

      fp->_IO_write_ptr = fp->_IO_write_base;

    }

}