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107 lines
2.4 KiB
C++
107 lines
2.4 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2005 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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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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namespace Scumm {
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class ScummFile;
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class Chunk {
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public:
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virtual ~Chunk() {};
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enum seek_type { seek_start, seek_end, seek_cur };
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typedef uint32 type;
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static const char *ChunkString(type t);
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virtual type getType() const = 0;
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virtual uint32 getSize() const = 0;
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virtual Chunk *subBlock() = 0;
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virtual bool eof() const = 0;
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virtual uint32 tell() const = 0;
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virtual bool seek(int32 delta, seek_type dir = seek_cur) = 0;
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virtual bool read(void *buffer, uint32 size) = 0;
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virtual int8 getChar() = 0;
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virtual byte getByte() = 0;
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virtual int16 getShort() = 0;
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virtual uint16 getWord() = 0;
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virtual uint32 getDword()= 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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BaseChunk();
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public:
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Chunk::type getType() const;
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uint32 getSize() const;
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bool eof() const;
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uint32 tell() const;
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bool seek(int32 delta, seek_type dir = seek_cur);
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};
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class FileChunk : public BaseChunk {
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private:
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ScummFile *_data;
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uint32 _offset;
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protected:
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FileChunk();
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public:
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FileChunk(const char *fname);
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virtual ~FileChunk();
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Chunk *subBlock();
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bool read(void *buffer, uint32 size);
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int8 getChar();
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byte getByte();
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short getShort();
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uint16 getWord();
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uint32 getDword();
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void reinit(uint32 offset);
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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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bool read(void *buffer, uint32 size);
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int8 getChar();
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byte getByte();
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int16 getShort();
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uint16 getWord();
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uint32 getDword();
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};
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} // End of namespace Scumm
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#endif
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