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
|
/* 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.
*
*/
#include "mohawk/installer_archive.h"
#include "common/dcl.h"
#include "common/debug.h"
namespace Mohawk {
InstallerArchive::InstallerArchive() : Common::Archive() {
_stream = 0;
}
InstallerArchive::~InstallerArchive() {
close();
}
bool InstallerArchive::open(const Common::String &filename) {
close();
_stream = SearchMan.createReadStreamForMember(filename);
if (!_stream)
return false;
// Check for the magic uint32
// No idea what it means, but it's how "file" recognizes them
if (_stream->readUint32BE() != 0x135D658C) {
close();
return false;
}
// Let's pull some relevant data from the header
_stream->seek(41);
uint32 directoryTableOffset = _stream->readUint32LE();
/* uint32 directoryTableSize = */ _stream->readUint32LE();
uint16 directoryCount = _stream->readUint16LE();
uint32 fileTableOffset = _stream->readUint32LE();
/* uint32 fileTableSize = */ _stream->readUint32LE();
// We need to have at least one directory in order for the archive to be valid
if (directoryCount == 0) {
close();
return false;
}
// TODO: Currently, we only support getting files from the first directory
// To that end, get the number of files from that entry
_stream->seek(directoryTableOffset);
uint16 fileCount = _stream->readUint16LE();
debug(2, "File count = %d", fileCount);
// Following the directory table is the file table with files stored recursively
// by directory. Since we're only using the first directory, we can just go
// right to that one.
_stream->seek(fileTableOffset);
for (uint16 i = 0; i < fileCount; i++) {
FileEntry entry;
_stream->skip(3); // Unknown
entry.uncompressedSize = _stream->readUint32LE();
entry.compressedSize = _stream->readUint32LE();
entry.offset = _stream->readUint32LE();
_stream->skip(14); // Unknown
byte nameLength = _stream->readByte();
Common::String name;
while (nameLength--)
name += _stream->readByte();
_stream->skip(13); // Unknown
_map[name] = entry;
debug(3, "Found file '%s' at 0x%08x (Comp: 0x%08x, Uncomp: 0x%08x)", name.c_str(),
entry.offset, entry.compressedSize, entry.uncompressedSize);
}
return true;
}
void InstallerArchive::close() {
delete _stream; _stream = 0;
_map.clear();
}
bool InstallerArchive::hasFile(const Common::String &name) const {
return _map.contains(name);
}
int InstallerArchive::listMembers(Common::ArchiveMemberList &list) const {
for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
list.push_back(getMember(it->_key));
return _map.size();
}
const Common::ArchiveMemberPtr InstallerArchive::getMember(const Common::String &name) const {
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}
Common::SeekableReadStream *InstallerArchive::createReadStreamForMember(const Common::String &name) const {
if (!_stream || !_map.contains(name))
return 0;
const FileEntry &entry = _map[name];
// Seek to our offset and then send it off to the decompressor
_stream->seek(entry.offset);
return Common::decompressDCL(_stream, entry.compressedSize, entry.uncompressedSize);
}
} // End of namespace Mohawk
|
