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// LimitedStreams.h
#ifndef ZIP7_INC_LIMITED_STREAMS_H
#define ZIP7_INC_LIMITED_STREAMS_H
#include "../../Common/MyBuffer.h"
#include "../../Common/MyCom.h"
#include "../../Common/MyVector.h"
#include "../IStream.h"
#include "StreamUtils.h"
Z7_CLASS_IMP_COM_1(
CLimitedSequentialInStream
, ISequentialInStream
)
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;
}
UInt64 GetSize() const { return _pos; }
UInt64 GetRem() const { return _size - _pos; }
bool WasFinished() const { return _wasFinished; }
};
Z7_CLASS_IMP_IInStream(
CLimitedInStream
)
CMyComPtr<IInStream> _stream;
UInt64 _virtPos;
UInt64 _physPos;
UInt64 _size;
UInt64 _startOffset;
HRESULT SeekToPhys() { return InStream_SeekSet(_stream, _physPos); }
public:
void SetStream(IInStream *stream) { _stream = stream; }
HRESULT InitAndSeek(UInt64 startOffset, UInt64 size)
{
_startOffset = startOffset;
_physPos = startOffset;
_virtPos = 0;
_size = size;
return SeekToPhys();
}
HRESULT SeekToStart() { return Seek(0, STREAM_SEEK_SET, NULL); }
};
HRESULT CreateLimitedInStream(IInStream *inStream, UInt64 pos, UInt64 size, ISequentialInStream **resStream);
Z7_CLASS_IMP_IInStream(
CClusterInStream
)
UInt64 _virtPos;
UInt64 _physPos;
UInt32 _curRem;
public:
unsigned BlockSizeLog;
UInt64 Size;
CMyComPtr<IInStream> Stream;
CRecordVector<UInt32> Vector;
UInt64 StartOffset;
HRESULT SeekToPhys() { return InStream_SeekSet(Stream, _physPos); }
HRESULT InitAndSeek()
{
_curRem = 0;
_virtPos = 0;
_physPos = StartOffset;
if (Vector.Size() > 0)
{
_physPos = StartOffset + (Vector[0] << BlockSizeLog);
return SeekToPhys();
}
return S_OK;
}
};
const UInt64 k_SeekExtent_Phy_Type_ZeroFill = (UInt64)(Int64)-1;
struct CSeekExtent
{
UInt64 Virt;
UInt64 Phy;
void SetAs_ZeroFill() { Phy = k_SeekExtent_Phy_Type_ZeroFill; }
bool Is_ZeroFill() const { return Phy == k_SeekExtent_Phy_Type_ZeroFill; }
};
Z7_CLASS_IMP_IInStream(
CExtentsStream
)
UInt64 _virtPos;
UInt64 _phyPos;
unsigned _prevExtentIndex;
public:
CMyComPtr<IInStream> Stream;
CRecordVector<CSeekExtent> Extents;
void ReleaseStream() { Stream.Release(); }
void Init()
{
_virtPos = 0;
_phyPos = (UInt64)0 - 1; // we need Seek() for Stream
_prevExtentIndex = 0;
}
};
Z7_CLASS_IMP_COM_1(
CLimitedSequentialOutStream
, ISequentialOutStream
)
CMyComPtr<ISequentialOutStream> _stream;
UInt64 _size;
bool _overflow;
bool _overflowIsAllowed;
public:
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; }
};
Z7_CLASS_IMP_IInStream(
CTailInStream
)
UInt64 _virtPos;
public:
CMyComPtr<IInStream> Stream;
UInt64 Offset;
void Init()
{
_virtPos = 0;
}
HRESULT SeekToStart() { return InStream_SeekSet(Stream, Offset); }
};
Z7_CLASS_IMP_IInStream(
CLimitedCachedInStream
)
CMyComPtr<IInStream> _stream;
UInt64 _virtPos;
UInt64 _physPos;
UInt64 _size;
UInt64 _startOffset;
const Byte *_cache;
size_t _cacheSize;
size_t _cachePhyPos;
HRESULT SeekToPhys() { return InStream_SeekSet(_stream, _physPos); }
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();
}
HRESULT SeekToStart() { return Seek(0, STREAM_SEEK_SET, NULL); }
};
class CTailOutStream Z7_final :
public IOutStream,
public CMyUnknownImp
{
Z7_IFACES_IMP_UNK_2(ISequentialOutStream, IOutStream)
UInt64 _virtPos;
UInt64 _virtSize;
public:
CMyComPtr<IOutStream> Stream;
UInt64 Offset;
void Init()
{
_virtPos = 0;
_virtSize = 0;
}
};
#endif
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