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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 "illusions/gamarchive.h"
namespace Illusions {
GamArchive::GamArchive(const char *filename)
: _fd(0), _groupCount(0), _groups(0) {
_fd = new Common::File();
if (!_fd->open(filename))
error("GamArchive::GamArchive() Could not open %s", filename);
loadDictionary();
}
GamArchive::~GamArchive() {
delete[] _groups;
}
byte *GamArchive::readResource(uint32 sceneId, uint32 resId, uint32 &dataSize) {
const GamFileEntry *fileEntry = getGroupFileEntry(sceneId, resId);
_fd->seek(fileEntry->_fileOffset);
dataSize = fileEntry->_fileSize;
byte *data = (byte*)malloc(dataSize);
_fd->read(data, dataSize);
return data;
}
void GamArchive::loadDictionary() {
_groupCount = _fd->readUint32LE();
_groups = new GamGroupEntry[_groupCount];
uint32 *groupOffsets = new uint32[_groupCount];
for (uint i = 0; i < _groupCount; ++i) {
_groups[i]._id = _fd->readUint32LE();
groupOffsets[i] = _fd->readUint32LE();
}
for (uint i = 0; i < _groupCount; ++i) {
_fd->seek(groupOffsets[i]);
uint32 fileCount = _fd->readUint32LE();
_groups[i]._fileCount = fileCount;
_groups[i]._files = new GamFileEntry[fileCount];
debug(8, "Group %08X, fileCount: %d", _groups[i]._id, _groups[i]._fileCount);
for (uint j = 0; j < fileCount; ++j) {
_groups[i]._files[j]._id = _fd->readUint32LE();
_groups[i]._files[j]._fileOffset = _fd->readUint32LE();
_groups[i]._files[j]._fileSize = _fd->readUint32LE();
debug(8, " %08X, %08X, %d", _groups[i]._files[j]._id, _groups[i]._files[j]._fileOffset, _groups[i]._files[j]._fileSize);
}
}
delete[] groupOffsets;
}
const GamGroupEntry *GamArchive::getGroupEntry(uint32 sceneId) {
for (uint i = 0; i < _groupCount; ++i) {
if (_groups[i]._id == sceneId)
return &_groups[i];
}
return 0;
}
const GamFileEntry *GamArchive::getFileEntry(const GamGroupEntry *groupEntry, uint32 resId) {
for (uint i = 0; i < groupEntry->_fileCount; ++i) {
if (groupEntry->_files[i]._id == resId)
return &groupEntry->_files[i];
}
return 0;
}
const GamFileEntry *GamArchive::getGroupFileEntry(uint32 sceneId, uint32 resId) {
const GamGroupEntry *groupEntry = getGroupEntry(sceneId);
if (!groupEntry)
error("GamArchive::getFileEntry() Group %08X not found", sceneId);
const GamFileEntry *fileEntry = getFileEntry(groupEntry, resId);
if (!fileEntry)
error("GamArchive::getFileEntry() File %08X in group %08X not found", resId, sceneId);
return fileEntry;
}
} // End of namespace Illusions
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