1 files changed, 240 insertions, 0 deletions
diff --git a/comphelper/source/streaming/memorystream.cxx b/comphelper/source/streaming/memorystream.cxx
new file mode 100644
index 000000000..b275ac34b
--- /dev/null
+++ b/comphelper/source/streaming/memorystream.cxx
@@ -0,0 +1,240 @@
+/* -*- 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 <algorithm>
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/io/XStream.hpp>
+#include <com/sun/star/io/XSeekableInputStream.hpp>
+#include <com/sun/star/io/XTruncate.hpp>
+//#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <osl/diagnose.h>
+
+#include <string.h>
+#include <vector>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+using ::cppu::OWeakObject;
+using ::cppu::WeakImplHelper;
+using namespace ::com::sun::star::io;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::osl;
+
+namespace comphelper
+{
+
+namespace {
+
+class UNOMemoryStream : public WeakImplHelper<XServiceInfo, XStream, XSeekableInputStream, XOutputStream, XTruncate>
+{
+public:
+    UNOMemoryStream();
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+    // XStream
+    virtual Reference< XInputStream > SAL_CALL getInputStream(  ) override;
+    virtual Reference< XOutputStream > SAL_CALL getOutputStream(  ) override;
+
+    // XInputStream
+    virtual sal_Int32 SAL_CALL readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override;
+    virtual sal_Int32 SAL_CALL readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) override;
+    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
+    virtual sal_Int32 SAL_CALL available() override;
+    virtual void SAL_CALL closeInput() override;
+
+    // XSeekable
+    virtual void SAL_CALL seek( sal_Int64 location ) override;
+    virtual sal_Int64 SAL_CALL getPosition() override;
+    virtual sal_Int64 SAL_CALL getLength() override;
+
+    // XOutputStream
+    virtual void SAL_CALL writeBytes( const Sequence< sal_Int8 >& aData ) override;
+    virtual void SAL_CALL flush() override;
+    virtual void SAL_CALL closeOutput() override;
+
+    // XTruncate
+    virtual void SAL_CALL truncate() override;
+
+private:
+    std::vector< sal_Int8 > maData;
+    sal_Int32 mnCursor;
+};
+
+}
+
+UNOMemoryStream::UNOMemoryStream()
+: mnCursor(0)
+{
+}
+
+// XServiceInfo
+OUString SAL_CALL UNOMemoryStream::getImplementationName()
+{
+    return "com.sun.star.comp.MemoryStream";
+}
+
+sal_Bool SAL_CALL UNOMemoryStream::supportsService(const OUString& ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence<OUString> SAL_CALL UNOMemoryStream::getSupportedServiceNames()
+{
+    return { "com.sun.star.comp.MemoryStream" };
+}
+
+// XStream
+Reference< XInputStream > SAL_CALL UNOMemoryStream::getInputStream(  )
+{
+    return this;
+}
+
+Reference< XOutputStream > SAL_CALL UNOMemoryStream::getOutputStream(  )
+{
+    return this;
+}
+
+// XInputStream
+sal_Int32 SAL_CALL UNOMemoryStream::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
+{
+    if( nBytesToRead < 0 )
+        throw IOException();
+
+    nBytesToRead = std::min( nBytesToRead, available() );
+    aData.realloc( nBytesToRead );
+
+    if( nBytesToRead )
+    {
+        sal_Int8* pData = &(*maData.begin());
+        sal_Int8* pCursor = &(pData[mnCursor]);
+        memcpy( static_cast<void*>(aData.getArray()), static_cast<void*>(pCursor), nBytesToRead );
+
+        mnCursor += nBytesToRead;
+    }
+
+    return nBytesToRead;
+}
+
+sal_Int32 SAL_CALL UNOMemoryStream::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
+{
+    return readBytes( aData, nMaxBytesToRead );
+}
+
+void SAL_CALL UNOMemoryStream::skipBytes( sal_Int32 nBytesToSkip )
+{
+    if( nBytesToSkip < 0 )
+        throw IOException();
+
+    mnCursor += std::min( nBytesToSkip, available() );
+}
+
+sal_Int32 SAL_CALL UNOMemoryStream::available()
+{
+    return std::min<sal_Int64>( SAL_MAX_INT32, maData.size() - mnCursor);
+}
+
+void SAL_CALL UNOMemoryStream::closeInput()
+{
+    mnCursor = 0;
+}
+
+// XSeekable
+void SAL_CALL UNOMemoryStream::seek( sal_Int64 location )
+{
+    if( (location < 0) || (location > SAL_MAX_INT32) )
+        throw IllegalArgumentException("this implementation does not support more than 2GB!", static_cast<OWeakObject*>(this), 0 );
+
+    // seek operation should be able to resize the stream
+    if ( location > static_cast< sal_Int64 >( maData.size() ) )
+        maData.resize( static_cast< sal_Int32 >( location ) );
+
+    mnCursor = static_cast< sal_Int32 >( location );
+}
+
+sal_Int64 SAL_CALL UNOMemoryStream::getPosition()
+{
+    return static_cast< sal_Int64 >( mnCursor );
+}
+
+sal_Int64 SAL_CALL UNOMemoryStream::getLength()
+{
+    return static_cast< sal_Int64 >( maData.size() );
+}
+
+// XOutputStream
+void SAL_CALL UNOMemoryStream::writeBytes( const Sequence< sal_Int8 >& aData )
+{
+    const sal_Int32 nBytesToWrite( aData.getLength() );
+    if( !nBytesToWrite )
+        return;
+
+    sal_Int64 nNewSize = static_cast<sal_Int64>(mnCursor) + nBytesToWrite;
+    if( nNewSize > SAL_MAX_INT32 )
+    {
+        OSL_ASSERT(false);
+        throw IOException("this implementation does not support more than 2GB!", static_cast<OWeakObject*>(this) );
+    }
+
+    if( static_cast< sal_Int32 >( nNewSize ) > static_cast< sal_Int32 >( maData.size() ) )
+        maData.resize( nNewSize );
+
+    sal_Int8* pData = &(*maData.begin());
+    sal_Int8* pCursor = &(pData[mnCursor]);
+    memcpy( pCursor, aData.getConstArray(), nBytesToWrite );
+
+    mnCursor += nBytesToWrite;
+}
+
+void SAL_CALL UNOMemoryStream::flush()
+{
+}
+
+void SAL_CALL UNOMemoryStream::closeOutput()
+{
+    mnCursor = 0;
+}
+
+//XTruncate
+void SAL_CALL UNOMemoryStream::truncate()
+{
+    maData.clear();
+    mnCursor = 0;
+}
+
+} // namespace comphelper
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_MemoryStream(
+    css::uno::XComponentContext *,
+    css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new ::comphelper::UNOMemoryStream());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */