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/* 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 "common/dcl.h"
#include "common/file.h"
#include "common/stream.h"
#include "common/substream.h"
#include "gnap/gnap.h"
#include "gnap/datarchive.h"
#include "engines/util.h"
namespace Gnap {
// DatArchive
DatArchive::DatArchive(const char *filename) {
_fd = new Common::File();
if (!_fd->open(filename))
error("DatArchive::DatArchive() Could not open %s", filename);
_fd->skip(8); // Skip signature
_fd->skip(2); // Skip unknown
_fd->skip(2); // Skip unknown
_entriesCount = _fd->readUint32LE();
debugC(kDebugBasic, "_entriesCount: %d", _entriesCount);
_fd->skip(4); // Skip unknown
_entries = new DatEntry[_entriesCount];
for (int i = 0; i < _entriesCount; ++i) {
_entries[i]._ofs = _fd->readUint32LE();
_entries[i]._outSize1 = _fd->readUint32LE();
_entries[i]._type = _fd->readUint32LE();
_entries[i]._outSize2 = _fd->readUint32LE();
}
}
DatArchive::~DatArchive() {
_fd->close();
delete _fd;
delete[] _entries;
}
byte *DatArchive::load(int index) {
_fd->seek(_entries[index]._ofs);
debugC(kDebugBasic, "_entries[index].outSize2: %d; _entries[index].outSize1: %d", _entries[index]._outSize2, _entries[index]._outSize1);
byte *buffer = new byte[_entries[index]._outSize1];
if (!Common::decompressDCL(_fd, buffer, _entries[index]._outSize2, _entries[index]._outSize1))
error("DatArchive::load() Error during decompression of entry %d", index);
return buffer;
}
// DatManager
DatManager::DatManager() {
for (int i = 0; i < kMaxDatArchives; ++i)
_datArchives[i] = nullptr;
}
DatManager::~DatManager() {
for (int i = 0; i < kMaxDatArchives; ++i)
delete _datArchives[i];
}
void DatManager::open(int index, const char *filename) {
close(index);
_datArchives[index] = new DatArchive(filename);
}
void DatManager::close(int index) {
delete _datArchives[index];
_datArchives[index] = nullptr;
}
byte *DatManager::loadResource(int resourceId) {
const int datIndex = ridToDatIndex(resourceId);
const int entryIndex = ridToEntryIndex(resourceId);
return _datArchives[datIndex] ? _datArchives[datIndex]->load(entryIndex) : 0;
}
uint32 DatManager::getResourceType(int resourceId) {
const int datIndex = ridToDatIndex(resourceId);
const int entryIndex = ridToEntryIndex(resourceId);
return _datArchives[datIndex] ? _datArchives[datIndex]->getEntryType(entryIndex) : 0;
}
uint32 DatManager::getResourceSize(int resourceId) {
const int datIndex = ridToDatIndex(resourceId);
const int entryIndex = ridToEntryIndex(resourceId);
return _datArchives[datIndex] ? _datArchives[datIndex]->getEntrySize(entryIndex) : 0;
}
int ridToDatIndex(int resourceId) {
return (resourceId & 0xFFFF0000) >> 16;
}
int ridToEntryIndex(int resourceId) {
return resourceId & 0xFFFF;
}
int makeRid(int datIndex, int entryIndex) {
return (datIndex << 16) | entryIndex;
}
} // End of namespace Gnap
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