109 lines
4.3 KiB
C++
109 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include <comphelper/streamsection.hxx>
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#include <osl/diagnose.h>
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namespace comphelper
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{
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//-------------------------------------------------------------------------
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OStreamSection::OStreamSection(const staruno::Reference< stario::XDataInputStream >& _rxInput)
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:m_xMarkStream(_rxInput, ::com::sun::star::uno::UNO_QUERY)
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,m_xInStream(_rxInput)
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,m_nBlockStart(-1)
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,m_nBlockLen(-1)
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{
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OSL_ENSURE(m_xInStream.is() && m_xMarkStream.is(), "OStreamSection::OStreamSection : invalid argument !");
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if (m_xInStream.is() && m_xMarkStream.is())
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{
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m_nBlockLen = _rxInput->readLong();
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m_nBlockStart = m_xMarkStream->createMark();
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}
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}
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//-------------------------------------------------------------------------
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OStreamSection::OStreamSection(const staruno::Reference< stario::XDataOutputStream >& _rxOutput, sal_Int32 _nPresumedLength)
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:m_xMarkStream(_rxOutput, ::com::sun::star::uno::UNO_QUERY)
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,m_xOutStream(_rxOutput)
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,m_nBlockStart(-1)
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,m_nBlockLen(-1)
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{
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OSL_ENSURE(m_xOutStream.is() && m_xMarkStream.is(), "OStreamSection::OStreamSection : invalid argument !");
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if (m_xOutStream.is() && m_xMarkStream.is())
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{
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m_nBlockStart = m_xMarkStream->createMark();
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// a placeholder where we will write the overall length (within the destructor)
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if (_nPresumedLength > 0)
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m_nBlockLen = _nPresumedLength + sizeof(m_nBlockLen);
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// as the caller did not consider - of course - the placeholder we are going to write
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else
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m_nBlockLen = 0;
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m_xOutStream->writeLong(m_nBlockLen);
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}
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}
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//-------------------------------------------------------------------------
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OStreamSection::~OStreamSection()
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{
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try
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{ // don't allow any exceptions to leave this block, this may be called during the stack unwinding of an exception
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// handling routing
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if (m_xInStream.is() && m_xMarkStream.is())
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{ // we're working on an input stream
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m_xMarkStream->jumpToMark(m_nBlockStart);
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m_xInStream->skipBytes(m_nBlockLen);
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m_xMarkStream->deleteMark(m_nBlockStart);
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}
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else if (m_xOutStream.is() && m_xMarkStream.is())
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{
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sal_Int32 nRealBlockLength = m_xMarkStream->offsetToMark(m_nBlockStart) - sizeof(m_nBlockLen);
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if (m_nBlockLen && (m_nBlockLen == nRealBlockLength))
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// nothing to do : the estimation the caller gave us (in the ctor) was correct
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m_xMarkStream->deleteMark(m_nBlockStart);
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else
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{ // the estimation was wrong (or we didn't get one)
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m_nBlockLen = nRealBlockLength;
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m_xMarkStream->jumpToMark(m_nBlockStart);
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m_xOutStream->writeLong(m_nBlockLen);
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m_xMarkStream->jumpToFurthest();
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m_xMarkStream->deleteMark(m_nBlockStart);
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}
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}
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}
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catch(const staruno::Exception&)
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{
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}
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}
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// -----------------------------------------------------------------------------
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} // namespace comphelper
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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