1 files changed, 146 insertions, 0 deletions
diff --git a/oox/source/helper/binarystreambase.cxx b/oox/source/helper/binarystreambase.cxx
new file mode 100644
index 0000000000..0f35c44ac6
--- /dev/null
+++ b/oox/source/helper/binarystreambase.cxx
@@ -0,0 +1,146 @@
+/* -*- 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/binarystreambase.hxx>
+#include <oox/helper/helper.hxx>
+
+#include <com/sun/star/io/XSeekable.hpp>
+#include <comphelper/diagnose_ex.hxx>
+
+namespace oox {
+
+using namespace ::com::sun::star::io;
+using namespace ::com::sun::star::uno;
+
+BinaryStreamBase::~BinaryStreamBase()
+{
+}
+
+sal_Int64 BinaryStreamBase::getRemaining() const
+{
+    // do not use isSeekable(), implementations may provide stream position and size even if not seekable
+    sal_Int64 nPos = tell();
+    sal_Int64 nLen = size();
+    return ((nPos >= 0) && (nLen >= 0)) ? ::std::max< sal_Int64 >( nLen - nPos, 0 ) : -1;
+}
+
+void BinaryStreamBase::alignToBlock( sal_Int32 nBlockSize, sal_Int64 nAnchorPos )
+{
+    sal_Int64 nStrmPos = tell();
+    // nothing to do, if stream is at anchor position
+    if( mbSeekable && (0 <= nAnchorPos) && (nAnchorPos != nStrmPos) && (nBlockSize > 1) )
+    {
+        // prevent modulo with negative arguments...
+        sal_Int64 nSkipSize = (nAnchorPos < nStrmPos) ?
+            (nBlockSize - ((nStrmPos - nAnchorPos - 1) % nBlockSize) - 1) :
+            ((nAnchorPos - nStrmPos) % nBlockSize);
+        seek( nStrmPos + nSkipSize );
+    }
+}
+
+BinaryXSeekableStream::BinaryXSeekableStream( const Reference< XSeekable >& rxSeekable ) :
+    BinaryStreamBase( rxSeekable.is() ),
+    mxSeekable( rxSeekable )
+{
+}
+
+BinaryXSeekableStream::~BinaryXSeekableStream()
+{
+}
+
+sal_Int64 BinaryXSeekableStream::size() const
+{
+    if( mxSeekable.is() ) try
+    {
+        return mxSeekable->getLength();
+    }
+    catch( Exception& )
+    {
+        TOOLS_WARN_EXCEPTION( "oox", "BinaryXSeekableStream::size" );
+    }
+    return -1;
+}
+
+sal_Int64 BinaryXSeekableStream::tell() const
+{
+    if( mxSeekable.is() ) try
+    {
+        return mxSeekable->getPosition();
+    }
+    catch( Exception& )
+    {
+        TOOLS_WARN_EXCEPTION( "oox", "BinaryXSeekableStream::tell" );
+    }
+    return -1;
+}
+
+void BinaryXSeekableStream::seek( sal_Int64 nPos )
+{
+    if( mxSeekable.is() ) try
+    {
+        mbEof = false;
+        mxSeekable->seek( nPos );
+    }
+    catch( Exception& )
+    {
+        mbEof = true;
+    }
+}
+
+void BinaryXSeekableStream::close()
+{
+    mxSeekable.clear();
+    mbEof = true;
+}
+
+SequenceSeekableStream::SequenceSeekableStream( const StreamDataSequence& rData ) :
+    BinaryStreamBase( true ),
+    mpData( &rData ),
+    mnPos( 0 )
+{
+}
+
+sal_Int64 SequenceSeekableStream::size() const
+{
+    return mpData ? mpData->getLength() : -1;
+}
+
+sal_Int64 SequenceSeekableStream::tell() const
+{
+    return mpData ? mnPos : -1;
+}
+
+void SequenceSeekableStream::seek( sal_Int64 nPos )
+{
+    if( mpData )
+    {
+        mnPos = getLimitedValue< sal_Int32, sal_Int64 >( nPos, 0, mpData->getLength() );
+        mbEof = mnPos != nPos;
+    }
+}
+
+void SequenceSeekableStream::close()
+{
+    mpData = nullptr;
+    mbEof = true;
+}
+
+} // namespace oox
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */