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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.
*
* $URL$
* $Id$
*
*/
#ifndef GOB_DATAIO_H
#define GOB_DATAIO_H
#include "common/stdafx.h"
#include "common/endian.h"
#include "common/file.h"
namespace Gob {
#define MAX_FILES 30
#define MAX_DATA_FILES 8
#define MAX_SLOT_COUNT 8
class DataIO;
class DataStream : public Common::SeekableReadStream {
public:
DataStream(DataIO &io, int16 handle, uint32 dSize, bool dispose = false);
DataStream(byte *buf, uint32 dSize, bool dispose = true);
virtual ~DataStream();
virtual uint32 pos() const;
virtual uint32 size() const;
virtual void seek(int32 offset, int whence = SEEK_SET);
virtual bool eos() const;
virtual uint32 read(void *dataPtr, uint32 dataSize);
private:
DataIO *_io;
int16 _handle;
uint32 _size;
byte *_data;
Common::MemoryReadStream *_stream;
bool _dispose;
};
class DataIO {
public:
struct ChunkDesc {
char chunkName[13];
uint32 size;
uint32 offset;
byte packed;
ChunkDesc() : size(0), offset(0), packed(0) { chunkName[0] = 0; }
};
int32 unpackData(byte *src, byte *dest);
void openDataFile(const char *src, bool itk = 0);
void closeDataFile(bool itk = 0);
byte *getUnpackedData(const char *name);
void closeData(int16 handle);
int16 openData(const char *path,
Common::File::AccessMode mode = Common::File::kFileReadMode);
DataStream *openAsStream(int16 handle, bool dispose = false);
int32 readData(int16 handle, byte *buf, uint16 size);
byte readByte(int16 handle);
uint16 readUint16(int16 handle);
uint32 readUint32(int16 handle);
int32 writeData(int16 handle, byte *buf, uint16 size);
void seekData(int16 handle, int32 pos, int16 from);
uint32 getPos(int16 handle);
int32 getDataSize(const char *name);
byte *getData(const char *path);
DataStream *getDataStream(const char *path);
DataIO(class GobEngine *vm);
~DataIO();
protected:
Common::File _filesHandles[MAX_FILES];
struct ChunkDesc *_dataFiles[MAX_DATA_FILES];
int16 _numDataChunks[MAX_DATA_FILES];
int16 _dataFileHandles[MAX_DATA_FILES];
bool _dataFileItk[MAX_DATA_FILES];
int32 _chunkPos[MAX_SLOT_COUNT * MAX_DATA_FILES];
int32 _chunkOffset[MAX_SLOT_COUNT * MAX_DATA_FILES];
int32 _chunkSize[MAX_SLOT_COUNT * MAX_DATA_FILES];
bool _isCurrentSlot[MAX_SLOT_COUNT * MAX_DATA_FILES];
int32 _packedSize;
class GobEngine *_vm;
int16 file_open(const char *path,
Common::File::AccessMode mode = Common::File::kFileReadMode);
Common::File *file_getHandle(int16 handle);
const Common::File *file_getHandle(int16 handle) const;
int16 getChunk(const char *chunkName);
char freeChunk(int16 handle);
int32 readChunk(int16 handle, byte *buf, uint16 size);
int16 seekChunk(int16 handle, int32 pos, int16 from);
uint32 getChunkPos(int16 handle) const;
int32 getChunkSize(const char *chunkName);
friend class DataStream;
};
} // End of namespace Gob
#endif // GOB_DATAIO_H
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