1/* Copyright (c) 2003, 2007 MySQL AB, 2009 Sun Microsystems, Inc.
2 Use is subject to license terms.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
16
17#include <sys/types.h>
18#include <sys/stat.h>
19#include <my_dir.h>
20
21
22class Transparent_file
23{
24 File filedes;
25 uchar *buff; /* in-memory window to the file or mmaped area */
26 /* current window sizes */
27 my_off_t lower_bound;
28 my_off_t upper_bound;
29 uint buff_size;
30
31public:
32
33 Transparent_file();
34 ~Transparent_file();
35
36 void init_buff(File filedes_arg);
37 uchar *ptr();
38 my_off_t start();
39 my_off_t end();
40 char get_value (my_off_t offset);
41 my_off_t read_next();
42};
43