1 files changed, 124 insertions, 0 deletions
diff --git a/comphelper/source/streaming/streamsection.cxx b/comphelper/source/streaming/streamsection.cxx
new file mode 100644
index 000000000000..1fa71fd42682
--- /dev/null
+++ b/comphelper/source/streaming/streamsection.cxx
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * 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 <comphelper/streamsection.hxx>
+#include <osl/diagnose.h>
+
+namespace comphelper
+{
+
+//-------------------------------------------------------------------------
+OStreamSection::OStreamSection(const staruno::Reference< stario::XDataInputStream >& _rxInput)
+    :m_xMarkStream(_rxInput, ::com::sun::star::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 staruno::Reference< stario::XDataOutputStream >& _rxOutput, sal_Int32 _nPresumedLength)
+    :m_xMarkStream(_rxOutput, ::com::sun::star::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();
+        // a placeholder where we will write the overall length (within the destructor)
+        if (_nPresumedLength > 0)
+            m_nBlockLen = _nPresumedLength + sizeof(m_nBlockLen);
+            // as the caller did not consider - of course - the placeholder we are going to write
+        else
+            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);
+            if (m_nBlockLen && (m_nBlockLen == nRealBlockLength))
+                // nothing to do : the estimation the caller gave us (in the ctor) was correct
+                m_xMarkStream->deleteMark(m_nBlockStart);
+            else
+            {   // the estimation was wrong (or we didn't get one)
+                m_nBlockLen = nRealBlockLength;
+                m_xMarkStream->jumpToMark(m_nBlockStart);
+                m_xOutStream->writeLong(m_nBlockLen);
+                m_xMarkStream->jumpToFurthest();
+                m_xMarkStream->deleteMark(m_nBlockStart);
+            }
+        }
+    }
+    catch(const staruno::Exception&)
+    {
+    }
+}
+// -----------------------------------------------------------------------------
+sal_Int32 OStreamSection::available()
+{
+    sal_Int32 nBytes = 0;
+    try
+    {   // don't allow any exceptions to leave this block, this may be called during the stack unwinding of an exception
+        if (m_xInStream.is() &&  m_xMarkStream.is())
+            nBytes = m_xMarkStream->offsetToMark(m_nBlockStart) - sizeof(m_nBlockLen);
+    }
+    catch(const staruno::Exception&)
+    {
+    }
+    return nBytes;
+}
+// -----------------------------------------------------------------------------
+
+}   // namespace comphelper
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */