ec6957f356
- upgraded to the latest LZMA SDK git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3637 212acab6-be3b-0410-9dea-997c60f758d6
74 lines
1.4 KiB
C++
74 lines
1.4 KiB
C++
// InBuffer.h
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#ifndef __INBUFFER_H
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#define __INBUFFER_H
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#include "../IStream.h"
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#ifndef _NO_EXCEPTIONS
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class CInBufferException
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{
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public:
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HRESULT ErrorCode;
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CInBufferException(HRESULT errorCode): ErrorCode(errorCode) {}
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};
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#endif
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class CInBuffer
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{
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UInt64 _processedSize;
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Byte *_bufferBase;
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UInt32 _bufferSize;
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Byte *_buffer;
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Byte *_bufferLimit;
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ISequentialInStream *_stream;
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bool _wasFinished;
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bool ReadBlock();
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public:
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#ifdef _NO_EXCEPTIONS
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HRESULT ErrorCode;
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#endif
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CInBuffer();
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~CInBuffer() { Free(); }
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bool Create(UInt32 bufferSize);
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void Free();
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void Init(ISequentialInStream *stream);
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// void ReleaseStream() { _stream.Release(); }
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bool ReadByte(Byte &b)
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{
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if(_buffer >= _bufferLimit)
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if(!ReadBlock())
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return false;
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b = *_buffer++;
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return true;
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}
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Byte ReadByte()
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{
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if(_buffer >= _bufferLimit)
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if(!ReadBlock())
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return 0xFF;
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return *_buffer++;
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}
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void ReadBytes(void *data, UInt32 size, UInt32 &processedSize)
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{
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for(processedSize = 0; processedSize < size; processedSize++)
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if (!ReadByte(((Byte *)data)[processedSize]))
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return;
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}
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bool ReadBytes(void *data, UInt32 size)
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{
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UInt32 processedSize;
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ReadBytes(data, size, processedSize);
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return (processedSize == size);
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}
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UInt64 GetProcessedSize() const { return _processedSize + (_buffer - _bufferBase); }
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bool WasFinished() const { return _wasFinished; }
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};
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#endif
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