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