mirror of
https://github.com/libretro/scummvm.git
synced 2025-02-12 22:51:11 +00:00
157 lines
3.9 KiB
C++
157 lines
3.9 KiB
C++
/* 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() {
|
|
}
|
|
|
|
MIXArchive::~MIXArchive() {
|
|
if (_fd.isOpen())
|
|
debug("~MIXArchive: fd not closed: %s", _fd.getName());
|
|
}
|
|
|
|
bool MIXArchive::open(const Common::String &filename) {
|
|
if (!_fd.open(filename)) {
|
|
debug("MIXArchive::open(): Could not open %s", filename.c_str());
|
|
return false;
|
|
}
|
|
|
|
_isTLK = filename.hasSuffix(".TLK");
|
|
|
|
_entry_count = _fd.readUint16LE();
|
|
_size = _fd.readUint32LE();
|
|
|
|
_entries.resize(_entry_count);
|
|
for (uint16 i = 0; i != _entry_count; ++i) {
|
|
_entries[i].id = _fd.readSint32LE();
|
|
_entries[i].offset = _fd.readUint32LE();
|
|
_entries[i].length = _fd.readUint32LE();
|
|
|
|
if (false)
|
|
debug("%08x %-12d %-12d", _entries[i].id, _entries[i].offset, _entries[i].length);
|
|
|
|
// Verify that the entries are sorted by id. Note that id is signed.
|
|
if (i > 0)
|
|
assert(_entries[i].id > _entries[i - 1].id);
|
|
}
|
|
|
|
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 mix_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]);
|
|
|
|
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 reinterpret_cast<int32&>(id);
|
|
}
|
|
|
|
static
|
|
int32 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::indexForId(int32 id) const {
|
|
uint32 lo = 0, hi = _entry_count;
|
|
|
|
while (lo < hi) {
|
|
uint32 mid = lo + (hi - lo) / 2;
|
|
|
|
if (id > _entries[mid].id)
|
|
lo = mid + 1;
|
|
else if (id < _entries[mid].id)
|
|
hi = mid;
|
|
else
|
|
return mid;
|
|
}
|
|
return _entry_count;
|
|
}
|
|
|
|
Common::SeekableReadStream *MIXArchive::createReadStreamForMember(const Common::String &name) {
|
|
int32 id;
|
|
|
|
if (_isTLK)
|
|
id = tlk_id(name);
|
|
else
|
|
id = mix_id(name);
|
|
|
|
uint32 i = indexForId(id);
|
|
|
|
if (i == _entry_count)
|
|
return NULL;
|
|
|
|
uint32 start = _entries[i].offset + 6 + 12 * _entry_count;
|
|
uint32 end = _entries[i].length + start;
|
|
|
|
return new Common::SafeSeekableSubReadStream(&_fd, start, end, DisposeAfterUse::NO);
|
|
}
|
|
|
|
} // End of namespace BladeRunner
|