libio/__fpurge.c

   1 /* Copyright (C) 2000, 2002 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <stdio_ext.h>
  20 #include "libioP.h"
  21
  22 void
  23 __fpurge (FILE *fp)
  24 {
  25   if (fp->_mode > 0)
  26     {
  27       /* Wide-char stream.  */
  28       if (_IO_in_backup (fp))
  29         INTUSE(_IO_free_wbackup_area) (fp);
  30
  31       fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
  32       fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;
  33     }
  34   else
  35     {
  36       /* Byte stream.  */
  37       if (_IO_in_backup (fp))
  38         INTUSE(_IO_free_backup_area) (fp);
  39
  40       fp->_IO_read_end = fp->_IO_read_ptr;
  41       fp->_IO_write_ptr = fp->_IO_write_base;
  42     }
  43 }