source: main/branches/64_bit_Greenstone/greenstone2/common-src/indexers/mgpp/lib/bitio_m_stdio.h@ 23508

Last change on this file since 23508 was 23508, checked in by sjm84, 14 years ago

Committing 64 bit changes into the branch

  • Property svn:executable set to *
  • Property svn:keywords set to Author Date Id Revision
File size: 2.9 KB
Line 
1/**************************************************************************
2 *
3 * bitio_m_stdio.h -- Macros for bitio to a file
4 * Copyright (C) 1994 Neil Sharman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 **************************************************************************
21 *
22 * This file contains macros for doing bitwise input and output on a FILE*.
23 * With these routines you cannot mix reads and writes on the FILE,
24 * or multiple writes, at the same time and guarantee them to work, also you
25 * cannot seek to a point and do a write. The decode routine can detect when
26 * you run off the end of the file and will produce an approate error message.
27 *
28 *
29 **************************************************************************/
30
31#ifndef H_BITIO_M_STDIO
32#define H_BITIO_M_STDIO
33
34#include "bitio_m_abstract.h"
35#include "mglong.h"
36
37class stdio_bitio_buffer : public bitio_buffer {
38protected:
39 FILE *file;
40 unsigned char buffer;
41 unsigned char btg;
42 mg_u_long bytesWritten;
43
44public:
45 stdio_bitio_buffer (FILE *f = NULL);
46
47 void attachFile (FILE *f);
48
49 unsigned char GetBtg () { return btg; }
50 mg_u_long GetBytesWritten () { return bytesWritten; }
51
52 void seek (u_int byte, unsigned char bit);
53 void seek (mg_u_long topos);
54 void error();
55 mg_s_long add00(mg_s_long b);
56 mg_s_long addff(mg_s_long b);
57 int bit();
58 int bitOffset() { return btg; }
59 void done();
60
61 void encodeStart();
62 void encodeBit(int bit);
63 void encodeDone();
64};
65
66
67/*#define ENCODE_START(f) \
68 { \
69 stdio_bitio_buffer buffer(f); \
70 buffer.encodeStart();
71
72#define ENCODE_CONTINUE(b) \
73 { \
74 stdio_bitio_buffer buffer; \
75 buffer.unpause(b);
76
77#define ENCODE_PAUSE(b) buffer.pause(&b);}
78
79#define ENCODE_DONE buffer.encodeDone();}
80
81#define DECODE_START(f) \
82 { \
83 stdio_bitio_buffer buffer(f);
84
85#define DECODE_CONTINUE(b) \
86 { \
87 stdio_bitio_buffer buffer; \
88 buffer.unpause(b);
89
90#define DECODE_ADD_FF(b) b = buffer.addff(b)
91
92#define DECODE_ADD_00(b) b = buffer.add00(b)
93
94#define DECODE_BIT buffer.bit()
95
96#define DECODE_DONE buffer.done();}
97
98#define DECODE_PAUSE(b) buffer.pause(&b);}
99*/
100
101#endif
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