1/* Copyright (C) 2000-2020 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, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <stdio_ext.h>
19#include "libioP.h"
20
21void
22__fpurge (FILE *fp)
23{
24 if (fp->_mode > 0)
25 {
26 /* Wide-char stream. */
27 if (_IO_in_backup (fp))
28 _IO_free_wbackup_area (fp);
29
30 fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
31 fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;
32 }
33 else
34 {
35 /* Byte stream. */
36 if (_IO_in_backup (fp))
37 _IO_free_backup_area (fp);
38
39 fp->_IO_read_end = fp->_IO_read_ptr;
40 fp->_IO_write_ptr = fp->_IO_write_base;
41 }
42}
43