91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
/*
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Copyright (C) 2002 Andrea Mazzoleni ( http://advancemame.sf.net )
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Copyright (C) 2001-4 Igor Pavlov ( http://www.7-zip.org )
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "winout.h"
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namespace NStream {
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namespace NWindow {
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void COut::Create(UINT32 aKeepSizeBefore, UINT32 aKeepSizeAfter, UINT32 aKeepSizeReserv)
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{
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m_Pos = 0;
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m_PosLimit = aKeepSizeReserv + aKeepSizeBefore;
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m_KeepSizeBefore = aKeepSizeBefore;
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m_KeepSizeAfter = aKeepSizeAfter;
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m_KeepSizeReserv = aKeepSizeReserv;
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m_StreamPos = 0;
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m_MoveFrom = m_KeepSizeReserv;
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m_WindowSize = aKeepSizeBefore;
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UINT32 aBlockSize = m_KeepSizeBefore + m_KeepSizeAfter + m_KeepSizeReserv;
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delete []m_Buffer;
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m_Buffer = new BYTE[aBlockSize];
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}
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COut::~COut()
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{
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delete []m_Buffer;
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}
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void COut::SetWindowSize(UINT32 aWindowSize)
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{
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m_WindowSize = aWindowSize;
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m_MoveFrom = m_KeepSizeReserv + m_KeepSizeBefore - aWindowSize;
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}
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void COut::Init(ISequentialOutStream *aStream, bool aSolid)
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{
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m_Stream = aStream;
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if(aSolid)
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m_StreamPos = m_Pos;
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else
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{
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m_Pos = 0;
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m_PosLimit = m_KeepSizeReserv + m_KeepSizeBefore;
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m_StreamPos = 0;
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}
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}
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HRESULT COut::Flush()
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{
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UINT32 aSize = m_Pos - m_StreamPos;
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if(aSize == 0)
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return S_OK;
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UINT32 aProcessedSize;
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HRESULT aResult = m_Stream->Write(m_Buffer + m_StreamPos, aSize, &aProcessedSize);
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if (aResult != S_OK)
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return aResult;
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if (aSize != aProcessedSize)
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return E_FAIL;
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m_StreamPos = m_Pos;
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return S_OK;
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}
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void COut::MoveBlockBackward()
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{
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HRESULT aResult = Flush();
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if (aResult != S_OK)
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throw aResult;
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memmove(m_Buffer, m_Buffer + m_MoveFrom, m_WindowSize + m_KeepSizeAfter);
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m_Pos -= m_MoveFrom;
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m_StreamPos -= m_MoveFrom;
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}
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}}
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