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92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
#ifndef _ISZIMAGESTREAM_H_
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#define _ISZIMAGESTREAM_H_
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#include "Types.h"
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#include "Stream.h"
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class CIszImageStream : public Framework::CStream
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{
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public:
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CIszImageStream(Framework::CStream*);
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virtual ~CIszImageStream();
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virtual void Seek(int64, Framework::STREAM_SEEK_DIRECTION);
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virtual uint64 Tell();
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virtual uint64 Read(void*, uint64);
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virtual uint64 Write(const void*, uint64);
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virtual bool IsEOF();
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private:
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#pragma pack(push, 1)
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struct HEADER
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{
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char signature[4];
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uint8 headerSize;
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int8 version;
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uint32 volumeSerialNumber;
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uint16 sectorSize;
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uint32 totalSectors;
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int8 hasPassword;
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int64 segmentSize;
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uint32 blockNumber;
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uint32 blockSize;
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uint8 blockPtrLength;
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int8 segmentNumber;
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uint32 blockPtrOffset;
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uint32 segmentPtrOffset;
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uint32 dataOffset;
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int8 reserved;
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};
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#pragma pack(pop)
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struct BLOCKDESCRIPTOR
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{
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uint32 size;
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uint8 storageType;
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};
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enum HASPASSWORD
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{
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ADI_PLAIN = 0,
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ADI_PASSWORD = 1,
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ADI_AES128 = 2,
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ADI_AES192 = 3,
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ADI_AES256 = 4
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};
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enum STORAGETYPE
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{
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ADI_ZERO = 0,
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ADI_DATA = 1,
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ADI_ZLIB = 2,
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ADI_BZ2 = 3
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};
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void ReadBlockDescriptorTable();
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uint64 GetTotalSize() const;
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const BLOCKDESCRIPTOR& SeekToBlock(uint64);
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void SyncCache();
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void ReadZeroBlock(uint32);
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void ReadDataBlock(uint32);
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void ReadGzipBlock(uint32);
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void ReadBz2Block(uint32);
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Framework::CStream* m_baseStream;
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HEADER m_header;
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BLOCKDESCRIPTOR* m_blockDescriptorTable;
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int64 m_cachedBlockNumber;
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uint8* m_cachedBlock;
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uint8* m_readBuffer;
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uint64 m_position;
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};
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#endif
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