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/* ResidualVM - A 3D game interpreter
*
* ResidualVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the AUTHORS
* 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.
*
*/
#ifndef MSCAB_H
#define MSCAB_H
#include "common/hashmap.h"
#include "common/hash-str.h"
#include "common/stream.h"
#include "common/archive.h"
#include "common/str.h"
#include "common/util.h"
namespace Grim {
class MsCabinet : public Common::Archive {
public:
MsCabinet(Common::SeekableReadStream *data);
~MsCabinet();
// Common::Archive API implementation
bool hasFile(const Common::String &name) const override;
int listMembers(Common::ArchiveMemberList &list) const override;
const Common::ArchiveMemberPtr getMember(const Common::String &name) const override;
Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const override;
private:
Common::SeekableReadStream *_data;
struct FolderEntry {
uint16 comp_type; //The compression type
uint16 num_blocks; //The total number of data blocks used by this folder
uint32 offset; //The cabinet offset of first datablock
};
struct FileEntry {
uint32 length; //Uncompressed size of the file in bytes
FolderEntry *folder; //Folder holding this file
uint32 folderOffset; //Uncompressed offset in the folder
};
typedef Common::HashMap<Common::String, FileEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> FileMap;
FileMap _fileMap;
typedef Common::HashMap<uint16, FolderEntry> FolderMap;
FolderMap _folderMap;
Common::String readString(Common::ReadStream *stream);
//Decompressor
class Decompressor {
public:
Decompressor(const FolderEntry *folder, Common::SeekableReadStream *_data);
~Decompressor();
bool decompressFile(byte *&fileBuf, const FileEntry &entry);
const FolderEntry *getFolder() const {
return _curFolder;
}
private:
Common::SeekableReadStream *_data;
const FolderEntry *_curFolder;
int16 _curBlock;
byte *_compressedBlock, *_decompressedBlock;
byte *_fileBuf;
uint16 _startBlock, _inBlockStart, _endBlock, _inBlockEnd;
void copyBlock(byte *&data_ptr) const;
enum {
kMszipCompression = 1,
kCabBlockSize = 0x8000,
kCabInputmax = kCabBlockSize + 12
};
};
mutable Decompressor *_decompressor;
//Cache
typedef Common::HashMap<Common::String, byte *, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> CacheMap;
mutable CacheMap _cache;
};
} // End of namespace Grim
#endif
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