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
|
/* 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 "bladerunner/archive.h"
#include "common/debug.h"
namespace BladeRunner {
MIXArchive::MIXArchive() {
_isTLK = false;
_entryCount = 0;
_size = 0;
}
MIXArchive::~MIXArchive() {
if (_fd.isOpen()) {
warning("~MIXArchive: File not closed: %s", _fd.getName());
}
}
bool MIXArchive::open(const Common::String &filename) {
if (!_fd.open(filename)) {
warning("MIXArchive::open(): Can not open %s", filename.c_str());
return false;
}
_isTLK = filename.hasSuffix(".TLK");
_entryCount = _fd.readUint16LE();
_size = _fd.readUint32LE();
_entries.resize(_entryCount);
for (uint16 i = 0; i != _entryCount; ++i) {
_entries[i].hash = _fd.readUint32LE();
_entries[i].offset = _fd.readUint32LE();
_entries[i].length = _fd.readUint32LE();
// Verify that the entries are sorted by id. Note that id is signed.
if (i > 0) {
assert(_entries[i].hash > _entries[i - 1].hash);
}
}
if (_fd.err()) {
error("MIXArchive::open(): Error reading entries in %s", filename.c_str());
_fd.close();
return false;
}
// debug("MIXArchive::open: Opened archive %s", filename.c_str());
return true;
}
void MIXArchive::close() {
return _fd.close();
}
bool MIXArchive::isOpen() const {
return _fd.isOpen();
}
#define ROL(n) ((n << 1) | ((n >> 31) & 1))
int32 MIXArchive::getHash(const Common::String &name) {
char buffer[12] = { 0 };
for (uint i = 0; i != name.size() && i < 12u; ++i) {
buffer[i] = (char)toupper(name[i]);
}
uint32 id = 0;
for (int i = 0; i < 12 && buffer[i]; i += 4) {
uint32 t = (uint32)buffer[i + 3] << 24
| (uint32)buffer[i + 2] << 16
| (uint32)buffer[i + 1] << 8
| (uint32)buffer[i + 0];
id = ROL(id) + t;
}
return id;
}
static uint32 tlk_id(const Common::String &name) {
char buffer[12] = { 0 };
for (uint i = 0; i != name.size() && i < 12u; ++i)
buffer[i] = (char)toupper(name[i]);
int actor_id = 10 * (buffer[0] - '0') +
(buffer[1] - '0');
int speech_id = 1000 * (buffer[3] - '0') +
100 * (buffer[4] - '0') +
10 * (buffer[5] - '0') +
(buffer[6] - '0');
return 10000 * actor_id + speech_id;
}
uint32 MIXArchive::indexForHash(int32 hash) const {
uint32 lo = 0, hi = _entryCount;
while (lo < hi) {
uint32 mid = lo + (hi - lo) / 2;
if (hash > _entries[mid].hash) {
lo = mid + 1;
} else if (hash < _entries[mid].hash) {
hi = mid;
} else {
return mid;
}
}
return _entryCount;
}
Common::SeekableReadStream *MIXArchive::createReadStreamForMember(const Common::String &name) {
int32 hash;
if (_isTLK) {
hash = tlk_id(name);
} else {
hash = MIXArchive::getHash(name);
}
uint32 i = indexForHash(hash);
if (i == _entryCount) {
return nullptr;
}
uint32 start = _entries[i].offset + 6 + 12 * _entryCount;
uint32 end = _entries[i].length + start;
return new Common::SafeSeekableSubReadStream(&_fd, start, end, DisposeAfterUse::NO);
}
} // End of namespace BladeRunner
|