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68dbb3a6 | 1 | /* |
96aa2d94 RM |
2 | Copyright (C) 1993 Free Software Foundation |
3 | ||
4 | This file is part of the GNU IO Library. This library is free | |
5 | software; you can redistribute it and/or modify it under the | |
6 | terms of the GNU General Public License as published by the | |
7 | Free Software Foundation; either version 2, or (at your option) | |
8 | any later version. | |
9 | ||
10 | This library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
68dbb3a6 UD |
16 | along with this library; see the file COPYING. If not, write to the Free |
17 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
96aa2d94 RM |
18 | |
19 | As a special exception, if you link this library with files | |
20 | compiled with a GNU compiler to produce an executable, this does not cause | |
21 | the resulting executable to be covered by the GNU General Public License. | |
22 | This exception does not however invalidate any other reasons why | |
23 | the executable file might be covered by the GNU General Public License. */ | |
24 | ||
25 | #include <libioP.h> | |
26 | ||
27 | _IO_pos_t | |
28 | DEFUN(_IO_seekoff, (fp, offset, dir, mode), | |
29 | _IO_FILE* fp AND _IO_off_t offset AND int dir AND int mode) | |
30 | { | |
31 | /* If we have a backup buffer, get rid of it, since the __seekoff | |
32 | callback may not know to do the right thing about it. | |
33 | This may be over-kill, but it'll do for now. TODO */ | |
34 | ||
35 | if (_IO_have_backup (fp)) | |
36 | { | |
37 | if (dir == _IO_seek_cur && _IO_in_backup (fp)) | |
38 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
39 | _IO_free_backup_area (fp); | |
40 | } | |
41 | ||
42 | return _IO_SEEKOFF (fp, offset, dir, mode); | |
43 | } |