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// LimitedStreams.h
#ifndef __LIMITED_STREAMS_H
#define __LIMITED_STREAMS_H
#include "../../Common/MyBuffer.h"
#include "../../Common/MyCom.h"
#include "../../Common/MyVector.h"
#include "../IStream.h"
class CLimitedSequentialInStream:
public ISequentialInStream,
public CMyUnknownImp
{
CMyComPtr<ISequentialInStream> _stream;
UInt64 _size;
UInt64 _pos;
bool _wasFinished;
public:
void SetStream(ISequentialInStream *stream) { _stream = stream; }
void ReleaseStream() { _stream.Release(); }
void Init(UInt64 streamSize)
{
_size = streamSize;
_pos = 0;
_wasFinished = false;
}
MY_UNKNOWN_IMP1(ISequentialInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
UInt64 GetSize() const { return _pos; }
UInt64 GetRem() const { return _size - _pos; }
bool WasFinished() const { return _wasFinished; }
};
class CLimitedInStream:
public IInStream,
public CMyUnknownImp
{
CMyComPtr<IInStream> _stream;
UInt64 _virtPos;
UInt64 _physPos;
UInt64 _size;
UInt64 _startOffset;
HRESULT SeekToPhys() { return _stream->Seek(_physPos, STREAM_SEEK_SET, NULL); }
public:
void SetStream(IInStream *stream) { _stream = stream; }
HRESULT InitAndSeek(UInt64 startOffset, UInt64 size)
{
_startOffset = startOffset;
_physPos = startOffset;
_virtPos = 0;
_size = size;
return SeekToPhys();
}
MY_UNKNOWN_IMP2(ISequentialInStream, IInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
HRESULT SeekToStart() { return Seek(0, STREAM_SEEK_SET, NULL); }
};
HRESULT CreateLimitedInStream(IInStream *inStream, UInt64 pos, UInt64 size, ISequentialInStream **resStream);
class CClusterInStream:
public IInStream,
public CMyUnknownImp
{
UInt64 _virtPos;
UInt64 _physPos;
UInt32 _curRem;
public:
unsigned BlockSizeLog;
UInt64 Size;
CMyComPtr<IInStream> Stream;
CRecordVector<UInt32> Vector;
UInt64 StartOffset;
HRESULT SeekToPhys() { return Stream->Seek(_physPos, STREAM_SEEK_SET, NULL); }
HRESULT InitAndSeek()
{
_curRem = 0;
_virtPos = 0;
_physPos = StartOffset;
if (Vector.Size() > 0)
{
_physPos = StartOffset + (Vector[0] << BlockSizeLog);
return SeekToPhys();
}
return S_OK;
}
MY_UNKNOWN_IMP2(ISequentialInStream, IInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
};
struct CSeekExtent
{
UInt64 Phy;
UInt64 Virt;
};
class CExtentsStream:
public IInStream,
public CMyUnknownImp
{
UInt64 _phyPos;
UInt64 _virtPos;
bool _needStartSeek;
HRESULT SeekToPhys() { return Stream->Seek(_phyPos, STREAM_SEEK_SET, NULL); }
public:
CMyComPtr<IInStream> Stream;
CRecordVector<CSeekExtent> Extents;
MY_UNKNOWN_IMP2(ISequentialInStream, IInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
void ReleaseStream() { Stream.Release(); }
void Init()
{
_virtPos = 0;
_phyPos = 0;
_needStartSeek = true;
}
};
class CLimitedSequentialOutStream:
public ISequentialOutStream,
public CMyUnknownImp
{
CMyComPtr<ISequentialOutStream> _stream;
UInt64 _size;
bool _overflow;
bool _overflowIsAllowed;
public:
MY_UNKNOWN_IMP1(ISequentialOutStream)
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
void SetStream(ISequentialOutStream *stream) { _stream = stream; }
void ReleaseStream() { _stream.Release(); }
void Init(UInt64 size, bool overflowIsAllowed = false)
{
_size = size;
_overflow = false;
_overflowIsAllowed = overflowIsAllowed;
}
bool IsFinishedOK() const { return (_size == 0 && !_overflow); }
UInt64 GetRem() const { return _size; }
};
class CTailInStream:
public IInStream,
public CMyUnknownImp
{
UInt64 _virtPos;
public:
CMyComPtr<IInStream> Stream;
UInt64 Offset;
void Init()
{
_virtPos = 0;
}
MY_UNKNOWN_IMP2(ISequentialInStream, IInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
HRESULT SeekToStart() { return Stream->Seek(Offset, STREAM_SEEK_SET, NULL); }
};
class CLimitedCachedInStream:
public IInStream,
public CMyUnknownImp
{
CMyComPtr<IInStream> _stream;
UInt64 _virtPos;
UInt64 _physPos;
UInt64 _size;
UInt64 _startOffset;
const Byte *_cache;
size_t _cacheSize;
size_t _cachePhyPos;
HRESULT SeekToPhys() { return _stream->Seek(_physPos, STREAM_SEEK_SET, NULL); }
public:
CByteBuffer Buffer;
void SetStream(IInStream *stream) { _stream = stream; }
void SetCache(size_t cacheSize, size_t cachePos)
{
_cache = Buffer;
_cacheSize = cacheSize;
_cachePhyPos = cachePos;
}
HRESULT InitAndSeek(UInt64 startOffset, UInt64 size)
{
_startOffset = startOffset;
_physPos = startOffset;
_virtPos = 0;
_size = size;
return SeekToPhys();
}
MY_UNKNOWN_IMP2(ISequentialInStream, IInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
HRESULT SeekToStart() { return Seek(0, STREAM_SEEK_SET, NULL); }
};
class CTailOutStream:
public IOutStream,
public CMyUnknownImp
{
UInt64 _virtPos;
UInt64 _virtSize;
public:
CMyComPtr<IOutStream> Stream;
UInt64 Offset;
virtual ~CTailOutStream() {}
MY_UNKNOWN_IMP2(ISequentialOutStream, IOutStream)
void Init()
{
_virtPos = 0;
_virtSize = 0;
}
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
STDMETHOD(SetSize)(UInt64 newSize);
};
#endif
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