960252e129
Change-Id: Ifc5d940fbf77ae13071c299fb6168bdc55dc5c95 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103493 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
232 lines
5.8 KiB
C++
232 lines
5.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <com/sun/star/io/IOException.hpp>
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#include <com/sun/star/io/NotConnectedException.hpp>
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#include <com/sun/star/io/TempFile.hpp>
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#include <com/sun/star/io/XOutputStream.hpp>
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#include <comphelper/seekableinput.hxx>
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using namespace ::com::sun::star;
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namespace comphelper
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{
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const sal_Int32 nConstBufferSize = 32000;
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static void copyInputToOutput_Impl( const uno::Reference< io::XInputStream >& xIn,
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const uno::Reference< io::XOutputStream >& xOut )
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{
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sal_Int32 nRead;
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uno::Sequence< sal_Int8 > aSequence( nConstBufferSize );
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do
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{
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nRead = xIn->readBytes( aSequence, nConstBufferSize );
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if ( nRead < nConstBufferSize )
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{
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uno::Sequence< sal_Int8 > aTempBuf( aSequence.getConstArray(), nRead );
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xOut->writeBytes( aTempBuf );
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}
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else
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xOut->writeBytes( aSequence );
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}
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while ( nRead == nConstBufferSize );
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}
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OSeekableInputWrapper::OSeekableInputWrapper(
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const uno::Reference< io::XInputStream >& xInStream,
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const uno::Reference< uno::XComponentContext >& rxContext )
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: m_xContext( rxContext )
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, m_xOriginalStream( xInStream )
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{
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if ( !m_xContext.is() )
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throw uno::RuntimeException();
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}
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OSeekableInputWrapper::~OSeekableInputWrapper()
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{
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}
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uno::Reference< io::XInputStream > OSeekableInputWrapper::CheckSeekableCanWrap(
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const uno::Reference< io::XInputStream >& xInStream,
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const uno::Reference< uno::XComponentContext >& rxContext )
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{
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// check that the stream is seekable and just wrap it if it is not
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uno::Reference< io::XSeekable > xSeek( xInStream, uno::UNO_QUERY );
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if ( xSeek.is() )
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return xInStream;
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return new OSeekableInputWrapper(xInStream, rxContext);
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}
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void OSeekableInputWrapper::PrepareCopy_Impl()
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{
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if ( !m_xCopyInput.is() )
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{
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if ( !m_xContext.is() )
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throw uno::RuntimeException();
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uno::Reference< io::XOutputStream > xTempOut(
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io::TempFile::create(m_xContext),
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uno::UNO_QUERY_THROW );
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copyInputToOutput_Impl( m_xOriginalStream, xTempOut );
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xTempOut->closeOutput();
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uno::Reference< io::XSeekable > xTempSeek( xTempOut, uno::UNO_QUERY );
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if ( xTempSeek.is() )
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{
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xTempSeek->seek( 0 );
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m_xCopyInput.set( xTempOut, uno::UNO_QUERY );
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if ( m_xCopyInput.is() )
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m_xCopySeek = xTempSeek;
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}
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}
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if ( !m_xCopyInput.is() )
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throw io::IOException("no m_xCopyInput");
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}
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// XInputStream
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sal_Int32 SAL_CALL OSeekableInputWrapper::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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return m_xCopyInput->readBytes( aData, nBytesToRead );
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}
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sal_Int32 SAL_CALL OSeekableInputWrapper::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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return m_xCopyInput->readSomeBytes( aData, nMaxBytesToRead );
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}
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void SAL_CALL OSeekableInputWrapper::skipBytes( sal_Int32 nBytesToSkip )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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m_xCopyInput->skipBytes( nBytesToSkip );
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}
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sal_Int32 SAL_CALL OSeekableInputWrapper::available()
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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return m_xCopyInput->available();
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}
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void SAL_CALL OSeekableInputWrapper::closeInput()
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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m_xOriginalStream->closeInput();
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m_xOriginalStream.clear();
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if ( m_xCopyInput.is() )
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{
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m_xCopyInput->closeInput();
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m_xCopyInput.clear();
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}
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m_xCopySeek.clear();
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}
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// XSeekable
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void SAL_CALL OSeekableInputWrapper::seek( sal_Int64 location )
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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m_xCopySeek->seek( location );
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}
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sal_Int64 SAL_CALL OSeekableInputWrapper::getPosition()
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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return m_xCopySeek->getPosition();
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}
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sal_Int64 SAL_CALL OSeekableInputWrapper::getLength()
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if ( !m_xOriginalStream.is() )
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throw io::NotConnectedException();
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PrepareCopy_Impl();
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return m_xCopySeek->getLength();
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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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