mirror of
https://github.com/libretro/scummvm.git
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142 lines
3.7 KiB
C++
142 lines
3.7 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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* $URL$
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* $Id$
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*
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*/
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#ifndef GOB_DATAIO_H
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#define GOB_DATAIO_H
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#include "common/endian.h"
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#include "common/file.h"
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namespace Gob {
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#define MAX_FILES 30
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#define MAX_DATA_FILES 8
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#define MAX_SLOT_COUNT 8
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class DataIO;
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class DataStream : public Common::SeekableReadStream {
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public:
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DataStream(DataIO &io, int16 handle, uint32 dSize, bool dispose = false);
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DataStream(byte *buf, uint32 dSize, bool dispose = true);
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virtual ~DataStream();
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virtual int32 pos() const;
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virtual int32 size() const;
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virtual bool seek(int32 offset, int whence = SEEK_SET);
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virtual bool eos() const;
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virtual uint32 read(void *dataPtr, uint32 dataSize);
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private:
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DataIO *_io;
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int16 _handle;
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uint32 _size;
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byte *_data;
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bool _dispose;
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Common::MemoryReadStream *_stream;
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};
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class DataIO {
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public:
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struct ChunkDesc {
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char chunkName[13];
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uint32 size;
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uint32 offset;
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byte packed;
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ChunkDesc() : size(0), offset(0), packed(0) { chunkName[0] = 0; }
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};
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int32 unpackData(byte *src, byte *dest);
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void openDataFile(const char *src, bool itk = 0);
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void closeDataFile(bool itk = 0);
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byte *getUnpackedData(const char *name);
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void closeData(int16 handle);
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int16 openData(const char *path);
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bool existData(const char *path);
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DataStream *openAsStream(int16 handle, bool dispose = false);
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int32 getDataSize(const char *name);
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byte *getData(const char *path);
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DataStream *getDataStream(const char *path);
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DataIO(class GobEngine *vm);
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~DataIO();
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protected:
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Common::File _filesHandles[MAX_FILES];
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ChunkDesc *_dataFiles [MAX_DATA_FILES];
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uint16 _numDataChunks [MAX_DATA_FILES];
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int16 _dataFileHandles[MAX_DATA_FILES];
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bool _dataFileItk [MAX_DATA_FILES];
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ChunkDesc *_chunk [MAX_SLOT_COUNT * MAX_DATA_FILES];
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int32 _chunkPos [MAX_SLOT_COUNT * MAX_DATA_FILES];
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bool _isCurrentSlot[MAX_SLOT_COUNT * MAX_DATA_FILES];
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class GobEngine *_vm;
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bool isDataFileChunk(int16 handle) const;
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bool isPacked (int16 handle) const;
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int getFile (int16 handle) const;
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int getSlot (int16 handle) const;
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int getIndex(int16 handle) const;
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int getIndex (int file, int slot) const;
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int16 getHandle(int file, int slot) const;
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int16 file_open(const char *path);
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Common::File *file_getHandle(int16 handle);
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const Common::File *file_getHandle(int16 handle) const;
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int16 getChunk(const char *chunkName);
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char freeChunk(int16 handle);
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int32 readChunk(int16 handle, byte *buf, uint16 size);
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int16 seekChunk(int16 handle, int32 pos, int16 from);
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uint32 getChunkPos(int16 handle) const;
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int32 getChunkSize(const char *chunkName, int32 &packSize);
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uint32 getPos(int16 handle);
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void seekData(int16 handle, int32 pos, int16 from);
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int32 readData(int16 handle, byte *buf, uint16 size);
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friend class DataStream;
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};
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} // End of namespace Gob
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#endif // GOB_DATAIO_H
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