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glibc  2.9
__fpurge.c
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00001 /* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <stdio_ext.h>
00020 #include "libioP.h"
00021 
00022 void
00023 __fpurge (FILE *fp)
00024 {
00025   if (fp->_mode > 0)
00026     {
00027       /* Wide-char stream.  */
00028       if (_IO_in_backup (fp))
00029        INTUSE(_IO_free_wbackup_area) (fp);
00030 
00031       fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
00032       fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;
00033     }
00034   else
00035     {
00036       /* Byte stream.  */
00037       if (_IO_in_backup (fp))
00038        INTUSE(_IO_free_backup_area) (fp);
00039 
00040       fp->_IO_read_end = fp->_IO_read_ptr;
00041       fp->_IO_write_ptr = fp->_IO_write_base;
00042     }
00043 }