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90 lines
2.0 KiB
C++
90 lines
2.0 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2006 The ScummVM project
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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 CHUNK_H
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#define CHUNK_H
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#include "common/scummsys.h"
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#include "common/str.h"
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#include "common/stream.h"
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namespace Scumm {
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class BaseScummFile;
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class Chunk : public Common::SeekableReadStream {
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public:
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typedef uint32 type;
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virtual type getType() const = 0;
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virtual Chunk *subBlock() = 0;
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virtual void reseek() = 0;
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};
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// Common functionality for concrete chunks (FileChunk, MemoryChunk)
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class BaseChunk : public Chunk {
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protected:
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Chunk::type _type;
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uint32 _size;
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uint32 _curPos;
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Common::String _name;
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BaseChunk();
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public:
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Chunk::type getType() const;
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uint32 size() const;
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bool eos() const;
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uint32 pos() const;
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void seek(int32 delta, int dir);
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};
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class FileChunk : public BaseChunk {
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private:
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BaseScummFile *_data;
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bool _deleteData;
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uint32 _offset;
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FileChunk(BaseScummFile *data, int offset);
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public:
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FileChunk(const Common::String &name, int offset = 0);
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virtual ~FileChunk();
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Chunk *subBlock();
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void reseek();
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uint32 read(void *buffer, uint32 size);
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};
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class MemoryChunk : public BaseChunk {
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private:
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byte *_data;
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public:
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MemoryChunk(byte *data);
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Chunk *subBlock();
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void reseek();
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uint32 read(void *buffer, uint32 size);
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};
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} // End of namespace Scumm
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#endif
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