diff options
Diffstat (limited to 'src/libs/7zip/win/CPP/7zip/Common/LimitedStreams.h')
-rw-r--r-- | src/libs/7zip/win/CPP/7zip/Common/LimitedStreams.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/libs/7zip/win/CPP/7zip/Common/LimitedStreams.h b/src/libs/7zip/win/CPP/7zip/Common/LimitedStreams.h new file mode 100644 index 000000000..2cbe18e48 --- /dev/null +++ b/src/libs/7zip/win/CPP/7zip/Common/LimitedStreams.h @@ -0,0 +1,125 @@ +// LimitedStreams.h + +#ifndef __LIMITED_STREAMS_H +#define __LIMITED_STREAMS_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_IMP + + STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize); + UInt64 GetSize() const { return _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_IMP1(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 CClusterInStream: + public IInStream, + public CMyUnknownImp +{ + UInt64 _virtPos; + UInt64 _physPos; + UInt32 _curRem; +public: + CMyComPtr<IInStream> Stream; + UInt64 StartOffset; + UInt64 Size; + int BlockSizeLog; + CRecordVector<UInt32> Vector; + + 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_IMP1(IInStream) + + STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize); + STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition); +}; + +HRESULT CreateLimitedInStream(IInStream *inStream, UInt64 pos, UInt64 size, ISequentialInStream **resStream); + +class CLimitedSequentialOutStream: + public ISequentialOutStream, + public CMyUnknownImp +{ + CMyComPtr<ISequentialOutStream> _stream; + UInt64 _size; + bool _overflow; + bool _overflowIsAllowed; +public: + MY_UNKNOWN_IMP + 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; } +}; + +#endif |