Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 232 insertions, 0 deletions

diff --git a/comphelper/source/streaming/seekableinput.cxx b/comphelper/source/streaming/seekableinput.cxx
new file mode 100644
index 000000000..e4f654043
--- /dev/null
+++ b/comphelper/source/streaming/seekableinput.cxx
@@ -0,0 +1,232 @@
+/* -*- 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 <sal/config.h>
+
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/io/NotConnectedException.hpp>
+#include <com/sun/star/io/TempFile.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+
+
+#include <comphelper/seekableinput.hxx>
+
+using namespace ::com::sun::star;
+
+namespace comphelper
+{
+
+const sal_Int32 nConstBufferSize = 32000;
+
+
+static 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< uno::XComponentContext >& rxContext )
+: m_xContext( rxContext )
+, m_xOriginalStream( xInStream )
+{
+    if ( !m_xContext.is() )
+        throw uno::RuntimeException();
+}
+
+
+OSeekableInputWrapper::~OSeekableInputWrapper()
+{
+}
+
+
+uno::Reference< io::XInputStream > OSeekableInputWrapper::CheckSeekableCanWrap(
+                            const uno::Reference< io::XInputStream >& xInStream,
+                            const uno::Reference< uno::XComponentContext >& rxContext )
+{
+    // 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;
+
+    return new OSeekableInputWrapper(xInStream, rxContext);
+}
+
+
+void OSeekableInputWrapper::PrepareCopy_Impl()
+{
+    if ( !m_xCopyInput.is() )
+    {
+        if ( !m_xContext.is() )
+            throw uno::RuntimeException();
+
+        uno::Reference< io::XOutputStream > xTempOut(
+                io::TempFile::create(m_xContext),
+                uno::UNO_QUERY_THROW );
+
+        copyInputToOutput_Impl( m_xOriginalStream, xTempOut );
+        xTempOut->closeOutput();
+
+        uno::Reference< io::XSeekable > xTempSeek( xTempOut, uno::UNO_QUERY );
+        if ( xTempSeek.is() )
+        {
+            xTempSeek->seek( 0 );
+            m_xCopyInput.set( 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 )
+{
+    ::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 )
+{
+    ::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 )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_xOriginalStream.is() )
+        throw io::NotConnectedException();
+
+    PrepareCopy_Impl();
+
+    m_xCopyInput->skipBytes( nBytesToSkip );
+}
+
+
+sal_Int32 SAL_CALL OSeekableInputWrapper::available()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_xOriginalStream.is() )
+        throw io::NotConnectedException();
+
+    PrepareCopy_Impl();
+
+    return m_xCopyInput->available();
+}
+
+
+void SAL_CALL OSeekableInputWrapper::closeInput()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_xOriginalStream.is() )
+        throw io::NotConnectedException();
+
+    m_xOriginalStream->closeInput();
+    m_xOriginalStream.clear();
+
+    if ( m_xCopyInput.is() )
+    {
+        m_xCopyInput->closeInput();
+        m_xCopyInput.clear();
+    }
+
+    m_xCopySeek.clear();
+}
+
+
+// XSeekable
+
+void SAL_CALL OSeekableInputWrapper::seek( sal_Int64 location )
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_xOriginalStream.is() )
+        throw io::NotConnectedException();
+
+    PrepareCopy_Impl();
+
+    m_xCopySeek->seek( location );
+}
+
+
+sal_Int64 SAL_CALL OSeekableInputWrapper::getPosition()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_xOriginalStream.is() )
+        throw io::NotConnectedException();
+
+    PrepareCopy_Impl();
+
+    return m_xCopySeek->getPosition();
+}
+
+
+sal_Int64 SAL_CALL OSeekableInputWrapper::getLength()
+{
+    ::osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_xOriginalStream.is() )
+        throw io::NotConnectedException();
+
+    PrepareCopy_Impl();
+
+    return m_xCopySeek->getLength();
+}
+
+}   // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */