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-rw-r--r--comphelper/source/streaming/seekableinput.cxx270
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diff --git a/comphelper/source/streaming/seekableinput.cxx b/comphelper/source/streaming/seekableinput.cxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: seekableinput.cxx,v $
+ * $Revision: 1.6 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_comphelper.hxx"
+#include <com/sun/star/io/XOutputStream.hpp>
+
+
+#include <comphelper/seekableinput.hxx>
+
+using namespace ::com::sun::star;
+
+namespace comphelper
+{
+
+const sal_Int32 nConstBufferSize = 32000;
+
+//---------------------------------------------------------------------------
+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< lang::XMultiServiceFactory >& xFactory )
+: m_xFactory( xFactory )
+, m_xOriginalStream( xInStream )
+{
+ if ( !m_xFactory.is() )
+ throw uno::RuntimeException();
+}
+
+//---------------------------------------------------------------------------
+OSeekableInputWrapper::~OSeekableInputWrapper()
+{
+}
+
+//---------------------------------------------------------------------------
+uno::Reference< io::XInputStream > OSeekableInputWrapper::CheckSeekableCanWrap(
+ const uno::Reference< io::XInputStream >& xInStream,
+ const uno::Reference< lang::XMultiServiceFactory >& xFactory )
+{
+ // 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;
+
+ uno::Reference< io::XInputStream > xNewStream(
+ static_cast< io::XInputStream* >(
+ new OSeekableInputWrapper( xInStream, xFactory ) ) );
+ return xNewStream;
+}
+
+//---------------------------------------------------------------------------
+void OSeekableInputWrapper::PrepareCopy_Impl()
+{
+ if ( !m_xCopyInput.is() )
+ {
+ if ( !m_xFactory.is() )
+ throw uno::RuntimeException();
+
+ uno::Reference< io::XOutputStream > xTempOut(
+ m_xFactory->createInstance( ::rtl::OUString::createFromAscii( "com.sun.star.io.TempFile" ) ),
+ uno::UNO_QUERY );
+
+ if ( xTempOut.is() )
+ {
+ copyInputToOutput_Impl( m_xOriginalStream, xTempOut );
+ xTempOut->closeOutput();
+
+ uno::Reference< io::XSeekable > xTempSeek( xTempOut, uno::UNO_QUERY );
+ if ( xTempSeek.is() )
+ {
+ xTempSeek->seek( 0 );
+ m_xCopyInput = uno::Reference< io::XInputStream >( xTempOut, uno::UNO_QUERY );
+ if ( m_xCopyInput.is() )
+ m_xCopySeek = xTempSeek;
+ }
+ }
+ }
+
+ if ( !m_xCopyInput.is() )
+ throw io::IOException();
+}
+
+// XInputStream
+//---------------------------------------------------------------------------
+sal_Int32 SAL_CALL OSeekableInputWrapper::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
+ throw ( io::NotConnectedException,
+ io::BufferSizeExceededException,
+ io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard 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 )
+ throw ( io::NotConnectedException,
+ io::BufferSizeExceededException,
+ io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard 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 )
+ throw ( io::NotConnectedException,
+ io::BufferSizeExceededException,
+ io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard aGuard( m_aMutex );
+
+ if ( !m_xOriginalStream.is() )
+ throw io::NotConnectedException();
+
+ PrepareCopy_Impl();
+
+ m_xCopyInput->skipBytes( nBytesToSkip );
+}
+
+//---------------------------------------------------------------------------
+sal_Int32 SAL_CALL OSeekableInputWrapper::available()
+ throw ( io::NotConnectedException,
+ io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard aGuard( m_aMutex );
+
+ if ( !m_xOriginalStream.is() )
+ throw io::NotConnectedException();
+
+ PrepareCopy_Impl();
+
+ return m_xCopyInput->available();
+}
+
+//---------------------------------------------------------------------------
+void SAL_CALL OSeekableInputWrapper::closeInput()
+ throw ( io::NotConnectedException,
+ io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard aGuard( m_aMutex );
+
+ if ( !m_xOriginalStream.is() )
+ throw io::NotConnectedException();
+
+ m_xOriginalStream->closeInput();
+ m_xOriginalStream = uno::Reference< io::XInputStream >();
+
+ if ( m_xCopyInput.is() )
+ {
+ m_xCopyInput->closeInput();
+ m_xCopyInput = uno::Reference< io::XInputStream >();
+ }
+
+ m_xCopySeek = uno::Reference< io::XSeekable >();
+}
+
+
+// XSeekable
+//---------------------------------------------------------------------------
+void SAL_CALL OSeekableInputWrapper::seek( sal_Int64 location )
+ throw ( lang::IllegalArgumentException,
+ io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard aGuard( m_aMutex );
+
+ if ( !m_xOriginalStream.is() )
+ throw io::NotConnectedException();
+
+ PrepareCopy_Impl();
+
+ m_xCopySeek->seek( location );
+}
+
+//---------------------------------------------------------------------------
+sal_Int64 SAL_CALL OSeekableInputWrapper::getPosition()
+ throw ( io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard aGuard( m_aMutex );
+
+ if ( !m_xOriginalStream.is() )
+ throw io::NotConnectedException();
+
+ PrepareCopy_Impl();
+
+ return m_xCopySeek->getPosition();
+}
+
+//---------------------------------------------------------------------------
+sal_Int64 SAL_CALL OSeekableInputWrapper::getLength()
+ throw ( io::IOException,
+ uno::RuntimeException )
+{
+ ::osl::MutexGuard aGuard( m_aMutex );
+
+ if ( !m_xOriginalStream.is() )
+ throw io::NotConnectedException();
+
+ PrepareCopy_Impl();
+
+ return m_xCopySeek->getLength();
+}
+
+} // namespace comphelper
+
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