120 lines
2.1 KiB
C++
120 lines
2.1 KiB
C++
// OutByte.cpp
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#include "StdAfx.h"
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#include "OutBuffer.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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bool COutBuffer::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 (_buffer != 0 && _bufferSize == bufferSize)
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return true;
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Free();
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_bufferSize = bufferSize;
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_buffer = (Byte *)::MidAlloc(bufferSize);
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return (_buffer != 0);
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}
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void COutBuffer::Free()
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{
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::MidFree(_buffer);
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_buffer = 0;
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}
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void COutBuffer::SetStream(ISequentialOutStream *stream)
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{
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_stream = stream;
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}
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void COutBuffer::Init()
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{
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_streamPos = 0;
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_limitPos = _bufferSize;
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_pos = 0;
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_processedSize = 0;
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_overDict = 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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UInt64 COutBuffer::GetProcessedSize() const
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{
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UInt64 res = _processedSize + _pos - _streamPos;
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if (_streamPos > _pos)
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res += _bufferSize;
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return res;
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}
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HRESULT COutBuffer::FlushPart()
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{
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// _streamPos < _bufferSize
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UInt32 size = (_streamPos >= _pos) ? (_bufferSize - _streamPos) : (_pos - _streamPos);
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HRESULT result = S_OK;
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#ifdef _NO_EXCEPTIONS
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result = ErrorCode;
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#endif
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if (_buffer2 != 0)
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{
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memmove(_buffer2, _buffer + _streamPos, size);
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_buffer2 += size;
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}
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if (_stream != 0
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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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{
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UInt32 processedSize = 0;
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result = _stream->Write(_buffer + _streamPos, size, &processedSize);
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size = processedSize;
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}
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_streamPos += size;
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if (_streamPos == _bufferSize)
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_streamPos = 0;
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if (_pos == _bufferSize)
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{
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_overDict = true;
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_pos = 0;
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}
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_limitPos = (_streamPos > _pos) ? _streamPos : _bufferSize;
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_processedSize += size;
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return result;
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}
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HRESULT COutBuffer::Flush()
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{
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#ifdef _NO_EXCEPTIONS
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if (ErrorCode != S_OK)
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return ErrorCode;
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#endif
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while(_streamPos != _pos)
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{
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HRESULT result = FlushPart();
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if (result != S_OK)
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return result;
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}
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return S_OK;
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}
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void COutBuffer::FlushWithCheck()
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{
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HRESULT result = Flush();
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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 COutBufferException(result);
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#endif
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}
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