1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef COMMON_UNARJ_H
#define COMMON_UNARJ_H
#include "common/file.h"
#include "common/hash-str.h"
namespace Common {
#define HEADER_ID 0xEA60
#define HEADER_ID_HI 0xEA
#define HEADER_ID_LO 0x60
#define FIRST_HDR_SIZE 30
#define FIRST_HDR_SIZE_V 34
#define COMMENT_MAX 2048
#define FNAME_MAX 512
#define HEADERSIZE_MAX (FIRST_HDR_SIZE + 10 + FNAME_MAX + COMMENT_MAX)
#define CRC_MASK 0xFFFFFFFFL
#define MAXSFX 25000L
#define CODE_BIT 16
#define CHAR_BIT 8
#define ARJ_UCHAR_MAX 255 // UCHAR_MAX is defined in limits.h in MSVC
#define THRESHOLD 3
#define DDICSIZ 26624
#define MAXDICBIT 16
#define MATCHBIT 8
#define MAXMATCH 256
#define NC (ARJ_UCHAR_MAX + MAXMATCH + 2 - THRESHOLD)
#define NP (MAXDICBIT + 1)
#define CBIT 9
#define NT (CODE_BIT + 3)
#define PBIT 5
#define TBIT 5
#if NT > NP
#define NPT NT
#else
#define NPT NP
#endif
#define CTABLESIZE 4096
#define PTABLESIZE 256
#define STRTP 9
#define STOPP 13
#define STRTL 0
#define STOPL 7
struct ArjHeader {
int32 pos;
uint16 id;
uint16 headerSize;
//
byte firstHdrSize;
byte nbr;
byte xNbr;
byte hostOs;
byte flags;
byte method;
byte fileType;
byte pad;
uint32 timeStamp;
int32 compSize;
int32 origSize;
uint32 fileCRC;
uint16 entryPos;
uint16 fileMode;
uint16 hostData;
char filename[FNAME_MAX];
char comment[COMMENT_MAX];
uint16 extHeaderSize;
uint32 headerCrc;
};
typedef HashMap<String, int, IgnoreCase_Hash, IgnoreCase_EqualTo> ArjFilesMap;
class ArjFile : public File {
public:
ArjFile();
~ArjFile();
void enableFallback(bool val) { _fallBack = val; }
void registerArchive(const String &filename);
bool open(const Common::String &filename);
void close();
uint32 read(void *dataPtr, uint32 dataSize);
bool eos();
uint32 pos();
uint32 size();
void seek(int32 offset, int whence = SEEK_SET);
bool isOpen() { return _isOpen; }
private:
bool _fallBack;
File _currArchive;
Array<ArjHeader *> _headers;
ArjFilesMap _fileMap;
StringMap _archMap;
ReadStream *_stream;
byte *_uncompressedData;
byte *_compressedData;
MemoryWriteStream *_outstream;
MemoryReadStream *_compressed;
SeekableReadStream *_uncompressed;
bool _isOpen;
int32 findHeader(void);
ArjHeader *readHeader();
void decode();
void decode_f();
uint16 _bitbuf;
int32 _compsize;
int32 _origsize;
byte _subbitbuf;
int _bitcount;
void init_getbits();
void fillbuf(int n);
uint16 getbits(int n);
void make_table(int nchar, byte *bitlen, int tablebits, uint16 *table, int tablesize);
void read_pt_len(int nn, int nbit, int i_special);
void read_c_len(void);
uint16 decode_c(void);
uint16 decode_p(void);
void decode_start(void);
int16 decode_ptr(void);
int16 decode_len(void);
private:
byte _text[DDICSIZ];
int16 _getlen;
int16 _getbuf;
uint16 _left[2 * NC - 1];
uint16 _right[2 * NC - 1];
byte _c_len[NC];
byte _pt_len[NPT];
uint16 _c_table[CTABLESIZE];
uint16 _pt_table[PTABLESIZE];
uint16 _blocksize;
};
} // End of namespace Common
#endif
|
