1 files changed, 91 insertions, 0 deletions
diff --git a/comphelper/source/streaming/streamsection.cxx b/comphelper/source/streaming/streamsection.cxx
new file mode 100644
index 000000000..b03df8ab7
--- /dev/null
+++ b/comphelper/source/streaming/streamsection.cxx
@@ -0,0 +1,91 @@
+/* -*- 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 <comphelper/streamsection.hxx>
+#include <com/sun/star/io/XMarkableStream.hpp>
+#include <com/sun/star/io/XDataInputStream.hpp>
+#include <com/sun/star/io/XDataOutputStream.hpp>
+#include <osl/diagnose.h>
+
+namespace comphelper
+{
+
+
+OStreamSection::OStreamSection(const css::uno::Reference< css::io::XDataInputStream >& _rxInput)
+    :m_xMarkStream(_rxInput, css::uno::UNO_QUERY)
+    ,m_xInStream(_rxInput)
+    ,m_nBlockStart(-1)
+    ,m_nBlockLen(-1)
+{
+    OSL_ENSURE(m_xInStream.is() && m_xMarkStream.is(), "OStreamSection::OStreamSection : invalid argument !");
+    if (m_xInStream.is() && m_xMarkStream.is())
+    {
+        m_nBlockLen = _rxInput->readLong();
+        m_nBlockStart = m_xMarkStream->createMark();
+    }
+}
+
+
+OStreamSection::OStreamSection(const css::uno::Reference< css::io::XDataOutputStream >& _rxOutput)
+    :m_xMarkStream(_rxOutput, css::uno::UNO_QUERY)
+    ,m_xOutStream(_rxOutput)
+    ,m_nBlockStart(-1)
+    ,m_nBlockLen(-1)
+{
+    OSL_ENSURE(m_xOutStream.is() && m_xMarkStream.is(), "OStreamSection::OStreamSection : invalid argument !");
+    if (m_xOutStream.is() && m_xMarkStream.is())
+    {
+        m_nBlockStart = m_xMarkStream->createMark();
+        m_nBlockLen = 0;
+        m_xOutStream->writeLong(m_nBlockLen);
+    }
+}
+
+
+OStreamSection::~OStreamSection()
+{
+    try
+    {   // don't allow any exceptions to leave this block, this may be called during the stack unwinding of an exception
+        // handling routing
+        if (m_xInStream.is() &&  m_xMarkStream.is())
+        {   // we're working on an input stream
+            m_xMarkStream->jumpToMark(m_nBlockStart);
+            m_xInStream->skipBytes(m_nBlockLen);
+            m_xMarkStream->deleteMark(m_nBlockStart);
+        }
+        else if (m_xOutStream.is() && m_xMarkStream.is())
+        {
+            sal_Int32 nRealBlockLength = m_xMarkStream->offsetToMark(m_nBlockStart) - sizeof(m_nBlockLen);
+            m_nBlockLen = nRealBlockLength;
+            m_xMarkStream->jumpToMark(m_nBlockStart);
+            m_xOutStream->writeLong(m_nBlockLen);
+            m_xMarkStream->jumpToFurthest();
+            m_xMarkStream->deleteMark(m_nBlockStart);
+        }
+    }
+    catch(const css::uno::Exception&)
+    {
+    }
+}
+
+
+}   // namespace comphelper
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */