PhysicsFS 2.0.3 imported.
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83
lib/physfs-2.0.3/lzma/CPP/7zip/Common/InBuffer.cpp
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83
lib/physfs-2.0.3/lzma/CPP/7zip/Common/InBuffer.cpp
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// InBuffer.cpp
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#include "StdAfx.h"
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#include "InBuffer.h"
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extern "C"
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{
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#include "../../../C/Alloc.h"
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}
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CInBuffer::CInBuffer():
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_buffer(0),
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_bufferLimit(0),
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_bufferBase(0),
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_stream(0),
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_bufferSize(0)
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{}
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bool CInBuffer::Create(UInt32 bufferSize)
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{
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const UInt32 kMinBlockSize = 1;
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if (bufferSize < kMinBlockSize)
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bufferSize = kMinBlockSize;
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if (_bufferBase != 0 && _bufferSize == bufferSize)
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return true;
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Free();
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_bufferSize = bufferSize;
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_bufferBase = (Byte *)::MidAlloc(bufferSize);
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return (_bufferBase != 0);
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}
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void CInBuffer::Free()
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{
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::MidFree(_bufferBase);
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_bufferBase = 0;
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}
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void CInBuffer::SetStream(ISequentialInStream *stream)
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{
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_stream = stream;
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}
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void CInBuffer::Init()
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{
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_processedSize = 0;
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_buffer = _bufferBase;
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_bufferLimit = _buffer;
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_wasFinished = false;
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#ifdef _NO_EXCEPTIONS
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ErrorCode = S_OK;
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#endif
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}
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bool CInBuffer::ReadBlock()
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{
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#ifdef _NO_EXCEPTIONS
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if (ErrorCode != S_OK)
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return false;
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#endif
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if (_wasFinished)
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return false;
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_processedSize += (_buffer - _bufferBase);
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UInt32 numProcessedBytes;
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HRESULT result = _stream->Read(_bufferBase, _bufferSize, &numProcessedBytes);
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#ifdef _NO_EXCEPTIONS
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ErrorCode = result;
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#else
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if (result != S_OK)
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throw CInBufferException(result);
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#endif
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_buffer = _bufferBase;
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_bufferLimit = _buffer + numProcessedBytes;
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_wasFinished = (numProcessedBytes == 0);
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return (!_wasFinished);
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}
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Byte CInBuffer::ReadBlock2()
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{
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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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