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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/ptr.h"
#include "common/file.h"
#ifndef ADL_DISK_H
#define ADL_DISK_H
namespace Common {
class SeekableReadStream;
class String;
}
namespace Adl {
class DataBlock {
public:
virtual ~DataBlock() { }
virtual bool isValid() const = 0;
virtual Common::SeekableReadStream *createReadStream() const = 0;
};
typedef Common::SharedPtr<DataBlock> DataBlockPtr;
class Files {
public:
virtual ~Files() { }
virtual const DataBlockPtr getDataBlock(const Common::String &filename, uint offset) const = 0;
virtual Common::SeekableReadStream *createReadStream(const Common::String &filename, uint offset) const = 0;
};
class FilesDataBlock : public DataBlock {
public:
FilesDataBlock(const Files *files, const Common::String &filename, uint offset) : _files(files), _filename(filename), _offset(offset) { }
bool isValid() const { return true; }
Common::SeekableReadStream *createReadStream() const;
private:
const Common::String _filename;
uint _offset;
const Files *_files;
};
class PlainFiles : public Files {
public:
const DataBlockPtr getDataBlock(const Common::String &filename, uint offset = 0) const;
Common::SeekableReadStream *createReadStream(const Common::String &filename, uint offset = 0) const;
};
class DiskImage {
public:
DiskImage();
virtual ~DiskImage();
virtual bool open(const Common::String &filename) = 0;
virtual const DataBlockPtr getDataBlock(uint track, uint sector, uint offset, uint size) const = 0;
virtual Common::SeekableReadStream *createReadStream(uint track, uint sector, uint offset, uint size) const = 0;
protected:
Common::File *_f;
uint _tracks, _sectorsPerTrack, _bytesPerSector;
};
class DiskImageDataBlock : public DataBlock {
public:
DiskImageDataBlock(const DiskImage *disk, uint track, uint sector, uint offset, uint size);
bool isValid() const;
Common::SeekableReadStream *createReadStream() const;
private:
uint _track, _sector, _offset, _size;
const DiskImage *_disk;
};
class DiskImage_DSK : public DiskImage {
public:
bool open(const Common::String &filename);
const DataBlockPtr getDataBlock(uint track, uint sector, uint offset, uint size) const;
Common::SeekableReadStream *createReadStream(uint track, uint sector, uint offset = 0, uint size = 0) const;
};
} // End of namespace Adl
#endif
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