mirror of
https://github.com/libretro/Play-.git
synced 2024-12-12 11:05:36 +00:00
89 lines
1.7 KiB
C++
89 lines
1.7 KiB
C++
#pragma once
|
|
|
|
#include "Types.h"
|
|
#include "Stream.h"
|
|
|
|
class CIszImageStream : public Framework::CStream
|
|
{
|
|
public:
|
|
CIszImageStream(Framework::CStream*);
|
|
virtual ~CIszImageStream();
|
|
|
|
virtual void Seek(int64, Framework::STREAM_SEEK_DIRECTION) override;
|
|
virtual uint64 Tell() override;
|
|
virtual uint64 Read(void*, uint64) override;
|
|
virtual uint64 Write(const void*, uint64) override;
|
|
virtual bool IsEOF() override;
|
|
|
|
private:
|
|
#pragma pack(push, 1)
|
|
struct HEADER
|
|
{
|
|
char signature[4];
|
|
uint8 headerSize;
|
|
int8 version;
|
|
uint32 volumeSerialNumber;
|
|
|
|
uint16 sectorSize;
|
|
uint32 totalSectors;
|
|
|
|
int8 hasPassword;
|
|
|
|
int64 segmentSize;
|
|
|
|
uint32 blockNumber;
|
|
uint32 blockSize;
|
|
uint8 blockPtrLength;
|
|
|
|
int8 segmentNumber;
|
|
|
|
uint32 blockPtrOffset;
|
|
uint32 segmentPtrOffset;
|
|
uint32 dataOffset;
|
|
|
|
int8 reserved;
|
|
};
|
|
#pragma pack(pop)
|
|
|
|
struct BLOCKDESCRIPTOR
|
|
{
|
|
uint32 size;
|
|
uint8 storageType;
|
|
};
|
|
|
|
enum HASPASSWORD
|
|
{
|
|
ADI_PLAIN = 0,
|
|
ADI_PASSWORD = 1,
|
|
ADI_AES128 = 2,
|
|
ADI_AES192 = 3,
|
|
ADI_AES256 = 4
|
|
};
|
|
|
|
enum STORAGETYPE
|
|
{
|
|
ADI_ZERO = 0,
|
|
ADI_DATA = 1,
|
|
ADI_ZLIB = 2,
|
|
ADI_BZ2 = 3
|
|
};
|
|
|
|
void ReadBlockDescriptorTable();
|
|
uint64 GetTotalSize() const;
|
|
const BLOCKDESCRIPTOR& SeekToBlock(uint64);
|
|
void SyncCache();
|
|
|
|
void ReadZeroBlock(uint32);
|
|
void ReadDataBlock(uint32);
|
|
void ReadGzipBlock(uint32);
|
|
void ReadBz2Block(uint32);
|
|
|
|
Framework::CStream* m_baseStream = nullptr;
|
|
HEADER m_header;
|
|
BLOCKDESCRIPTOR* m_blockDescriptorTable = nullptr;
|
|
int64 m_cachedBlockNumber = -1;
|
|
uint8* m_cachedBlock = nullptr;
|
|
uint8* m_readBuffer = nullptr;
|
|
uint64 m_position = 0;
|
|
};
|