9ff4b3ef43
git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6577 212acab6-be3b-0410-9dea-997c60f758d6
91 lines
2 KiB
C++
91 lines
2 KiB
C++
/*
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* InBuffer.h
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*
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* This file is a part of LZMA compression module for NSIS.
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*
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* Original LZMA SDK Copyright (C) 1999-2006 Igor Pavlov
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* Modifications Copyright (C) 2003-2015 Amir Szekely <kichik@netvision.net.il>
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*
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* Licensed under the Common Public License version 1.0 (the "License");
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* you may not use this file except in compliance with the License.
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*
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* Licence details can be found in the file COPYING.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty.
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*/
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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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#include "../../Common/MyCom.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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Byte *_buffer;
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Byte *_bufferLimit;
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Byte *_bufferBase;
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CMyComPtr<ISequentialInStream> _stream;
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UInt64 _processedSize;
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UInt32 _bufferSize;
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bool _wasFinished;
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bool ReadBlock();
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Byte ReadBlock2();
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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 SetStream(ISequentialInStream *stream);
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void Init();
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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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return ReadBlock2();
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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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