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diff --git a/oox/source/helper/storagebase.cxx b/oox/source/helper/storagebase.cxx
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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 <oox/helper/storagebase.hxx>
+
+#include <com/sun/star/io/XStream.hpp>
+#include <osl/diagnose.h>
+#include <rtl/ustrbuf.hxx>
+#include <oox/helper/binaryinputstream.hxx>
+#include <oox/helper/binaryoutputstream.hxx>
+
+namespace oox {
+
+using namespace ::com::sun::star::embed;
+using namespace ::com::sun::star::io;
+using namespace ::com::sun::star::uno;
+
+namespace {
+
+void lclSplitFirstElement( OUString& orElement, OUString& orRemainder, const OUString& _aFullName )
+{
+ OUString aFullName = _aFullName;
+ sal_Int32 nSlashPos = aFullName.indexOf( '/' );
+
+ // strip leading slashes
+ while( nSlashPos == 0 )
+ {
+ aFullName = aFullName.copy(1);
+ nSlashPos = aFullName.indexOf( '/' );
+ }
+
+ if( (0 <= nSlashPos) && (nSlashPos < aFullName.getLength()) )
+ {
+ orElement = aFullName.copy( 0, nSlashPos );
+ orRemainder = aFullName.copy( nSlashPos + 1 );
+ }
+ else
+ {
+ orElement = aFullName;
+ }
+}
+
+} // namespace
+
+StorageBase::StorageBase( const Reference< XInputStream >& rxInStream, bool bBaseStreamAccess ) :
+ mxInStream( rxInStream ),
+ mbBaseStreamAccess( bBaseStreamAccess ),
+ mbReadOnly( true )
+{
+ OSL_ENSURE( mxInStream.is(), "StorageBase::StorageBase - missing base input stream" );
+}
+
+StorageBase::StorageBase( const Reference< XStream >& rxOutStream, bool bBaseStreamAccess ) :
+ mxOutStream( rxOutStream ),
+ mbBaseStreamAccess( bBaseStreamAccess ),
+ mbReadOnly( false )
+{
+ OSL_ENSURE( mxOutStream.is(), "StorageBase::StorageBase - missing base output stream" );
+}
+
+StorageBase::StorageBase( const StorageBase& rParentStorage, const OUString& rStorageName, bool bReadOnly ) :
+ maParentPath( rParentStorage.getPath() ),
+ maStorageName( rStorageName ),
+ mbBaseStreamAccess( false ),
+ mbReadOnly( bReadOnly )
+{
+}
+
+StorageBase::~StorageBase()
+{
+}
+
+bool StorageBase::isStorage() const
+{
+ return implIsStorage();
+}
+
+bool StorageBase::isRootStorage() const
+{
+ return implIsStorage() && maStorageName.isEmpty();
+}
+
+Reference< XStorage > StorageBase::getXStorage() const
+{
+ return implGetXStorage();
+}
+
+OUString StorageBase::getPath() const
+{
+ OUStringBuffer aBuffer( maParentPath );
+ if( !aBuffer.isEmpty() )
+ aBuffer.append( '/' );
+ aBuffer.append( maStorageName );
+ return aBuffer.makeStringAndClear();
+}
+
+void StorageBase::getElementNames( ::std::vector< OUString >& orElementNames ) const
+{
+ orElementNames.clear();
+ implGetElementNames( orElementNames );
+}
+
+StorageRef StorageBase::openSubStorage( const OUString& rStorageName, bool bCreateMissing )
+{
+ StorageRef xSubStorage;
+ OSL_ENSURE( !bCreateMissing || !mbReadOnly, "StorageBase::openSubStorage - cannot create substorage in read-only mode" );
+ if( !bCreateMissing || !mbReadOnly )
+ {
+ OUString aElement, aRemainder;
+ lclSplitFirstElement( aElement, aRemainder, rStorageName );
+ if( !aElement.isEmpty() )
+ xSubStorage = getSubStorage( aElement, bCreateMissing );
+ if( xSubStorage && !aRemainder.isEmpty() )
+ xSubStorage = xSubStorage->openSubStorage( aRemainder, bCreateMissing );
+ }
+ return xSubStorage;
+}
+
+Reference< XInputStream > StorageBase::openInputStream( const OUString& rStreamName )
+{
+ Reference< XInputStream > xInStream;
+ OUString aElement, aRemainder;
+ lclSplitFirstElement( aElement, aRemainder, rStreamName );
+ if( !aElement.isEmpty() )
+ {
+ if( !aRemainder.isEmpty() )
+ {
+ StorageRef xSubStorage = getSubStorage( aElement, false );
+ if( xSubStorage )
+ xInStream = xSubStorage->openInputStream( aRemainder );
+ }
+ else
+ {
+ xInStream = implOpenInputStream( aElement );
+ }
+ }
+ else if( mbBaseStreamAccess )
+ {
+ xInStream = mxInStream;
+ }
+ return xInStream;
+}
+
+Reference< XOutputStream > StorageBase::openOutputStream( const OUString& rStreamName )
+{
+ Reference< XOutputStream > xOutStream;
+ OSL_ENSURE( !mbReadOnly, "StorageBase::openOutputStream - cannot create output stream in read-only mode" );
+ if( !mbReadOnly )
+ {
+ OUString aElement, aRemainder;
+ lclSplitFirstElement( aElement, aRemainder, rStreamName );
+ if( !aElement.isEmpty() )
+ {
+ if( !aRemainder.isEmpty() )
+ {
+ StorageRef xSubStorage = getSubStorage( aElement, true );
+ if( xSubStorage )
+ xOutStream = xSubStorage->openOutputStream( aRemainder );
+ }
+ else
+ {
+ xOutStream = implOpenOutputStream( aElement );
+ }
+ }
+ else if( mbBaseStreamAccess )
+ {
+ xOutStream = mxOutStream->getOutputStream();
+ }
+ }
+ return xOutStream;
+}
+
+void StorageBase::copyToStorage( StorageBase& rDestStrg, const OUString& rElementName )
+{
+ OSL_ENSURE( rDestStrg.isStorage() && !rDestStrg.isReadOnly(), "StorageBase::copyToStorage - invalid destination" );
+ OSL_ENSURE( !rElementName.isEmpty(), "StorageBase::copyToStorage - invalid element name" );
+ if( !(rDestStrg.isStorage() && !rDestStrg.isReadOnly() && !rElementName.isEmpty()) )
+ return;
+
+ StorageRef xSubStrg = openSubStorage( rElementName, false );
+ if( xSubStrg )
+ {
+ StorageRef xDestSubStrg = rDestStrg.openSubStorage( rElementName, true );
+ if( xDestSubStrg )
+ xSubStrg->copyStorageToStorage( *xDestSubStrg );
+ }
+ else
+ {
+ Reference< XInputStream > xInStrm = openInputStream( rElementName );
+ if( xInStrm.is() )
+ {
+ Reference< XOutputStream > xOutStrm = rDestStrg.openOutputStream( rElementName );
+ if( xOutStrm.is() )
+ {
+ BinaryXInputStream aInStrm( xInStrm, true );
+ BinaryXOutputStream aOutStrm( xOutStrm, true );
+ aInStrm.copyToStream( aOutStrm );
+ }
+ }
+ }
+}
+
+void StorageBase::copyStorageToStorage( StorageBase& rDestStrg )
+{
+ OSL_ENSURE( rDestStrg.isStorage() && !rDestStrg.isReadOnly(), "StorageBase::copyToStorage - invalid destination" );
+ if( rDestStrg.isStorage() && !rDestStrg.isReadOnly() )
+ {
+ ::std::vector< OUString > aElements;
+ getElementNames( aElements );
+ for (auto const& elem : aElements)
+ copyToStorage(rDestStrg, elem);
+ }
+}
+
+void StorageBase::commit()
+{
+ OSL_ENSURE( !mbReadOnly, "StorageBase::commit - cannot commit in read-only mode" );
+ if( !mbReadOnly )
+ {
+ // commit all open substorages
+ maSubStorages.forEachMem( &StorageBase::commit );
+ // commit this storage
+ implCommit();
+ }
+}
+
+// private --------------------------------------------------------------------
+
+StorageRef StorageBase::getSubStorage( const OUString& rElementName, bool bCreateMissing )
+{
+ StorageRef& rxSubStrg = maSubStorages[ rElementName ];
+ if( !rxSubStrg )
+ rxSubStrg = implOpenSubStorage( rElementName, bCreateMissing );
+ return rxSubStrg;
+}
+
+} // namespace oox
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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