mirror of
https://github.com/libretro/scummvm.git
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105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "illusions/gamarchive.h"
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namespace Illusions {
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GamArchive::GamArchive(const char *filename)
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: _fd(0), _groupCount(0), _groups(0) {
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_fd = new Common::File();
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if (!_fd->open(filename))
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error("GamArchive::GamArchive() Could not open %s", filename);
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loadDictionary();
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}
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GamArchive::~GamArchive() {
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delete[] _groups;
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delete _fd;
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}
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byte *GamArchive::readResource(uint32 sceneId, uint32 resId, uint32 &dataSize) {
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const GamFileEntry *fileEntry = getGroupFileEntry(sceneId, resId);
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_fd->seek(fileEntry->_fileOffset);
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dataSize = fileEntry->_fileSize;
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byte *data = (byte*)malloc(dataSize);
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_fd->read(data, dataSize);
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return data;
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}
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void GamArchive::loadDictionary() {
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_groupCount = _fd->readUint32LE();
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_groups = new GamGroupEntry[_groupCount];
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uint32 *groupOffsets = new uint32[_groupCount];
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for (uint i = 0; i < _groupCount; ++i) {
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_groups[i]._id = _fd->readUint32LE();
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groupOffsets[i] = _fd->readUint32LE();
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}
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for (uint i = 0; i < _groupCount; ++i) {
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_fd->seek(groupOffsets[i]);
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uint32 fileCount = _fd->readUint32LE();
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_groups[i]._fileCount = fileCount;
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_groups[i]._files = new GamFileEntry[fileCount];
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debug(8, "Group %08X, fileCount: %d", _groups[i]._id, _groups[i]._fileCount);
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for (uint j = 0; j < fileCount; ++j) {
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_groups[i]._files[j]._id = _fd->readUint32LE();
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_groups[i]._files[j]._fileOffset = _fd->readUint32LE();
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_groups[i]._files[j]._fileSize = _fd->readUint32LE();
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debug(8, " %08X, %08X, %d", _groups[i]._files[j]._id, _groups[i]._files[j]._fileOffset, _groups[i]._files[j]._fileSize);
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}
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}
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delete[] groupOffsets;
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}
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const GamGroupEntry *GamArchive::getGroupEntry(uint32 sceneId) {
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for (uint i = 0; i < _groupCount; ++i) {
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if (_groups[i]._id == sceneId)
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return &_groups[i];
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}
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return 0;
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}
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const GamFileEntry *GamArchive::getFileEntry(const GamGroupEntry *groupEntry, uint32 resId) {
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for (uint i = 0; i < groupEntry->_fileCount; ++i) {
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if (groupEntry->_files[i]._id == resId)
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return &groupEntry->_files[i];
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}
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return 0;
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}
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const GamFileEntry *GamArchive::getGroupFileEntry(uint32 sceneId, uint32 resId) {
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const GamGroupEntry *groupEntry = getGroupEntry(sceneId);
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if (!groupEntry)
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error("GamArchive::getFileEntry() Group %08X not found", sceneId);
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const GamFileEntry *fileEntry = getFileEntry(groupEntry, resId);
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if (!fileEntry)
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error("GamArchive::getFileEntry() File %08X in group %08X not found", resId, sceneId);
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return fileEntry;
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}
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} // End of namespace Illusions
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