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diff --git a/io/source/TextOutputStream/TextOutputStream.cxx b/io/source/TextOutputStream/TextOutputStream.cxx
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+/* -*- 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 <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <rtl/textenc.h>
+#include <rtl/tencinfo.h>
+
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/io/XTextOutputStream2.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+using namespace ::osl;
+using namespace ::cppu;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::io;
+
+// Implementation XTextOutputStream
+
+namespace {
+
+class OTextOutputStream : public WeakImplHelper< XTextOutputStream2, XServiceInfo >
+{
+ Reference< XOutputStream > mxStream;
+
+ // Encoding
+ bool mbEncodingInitialized;
+ rtl_UnicodeToTextConverter mConvUnicode2Text;
+ rtl_UnicodeToTextContext mContextUnicode2Text;
+
+ Sequence<sal_Int8> implConvert( const OUString& rSource );
+ /// @throws IOException
+ void checkOutputStream() const;
+
+public:
+ OTextOutputStream();
+ virtual ~OTextOutputStream() override;
+
+ // Methods XTextOutputStream
+ virtual void SAL_CALL writeString( const OUString& aString ) override;
+ virtual void SAL_CALL setEncoding( const OUString& Encoding ) override;
+
+ // Methods XOutputStream
+ virtual void SAL_CALL writeBytes( const Sequence< sal_Int8 >& aData ) override;
+ virtual void SAL_CALL flush( ) override;
+ virtual void SAL_CALL closeOutput( ) override;
+
+ // Methods XActiveDataSource
+ virtual void SAL_CALL setOutputStream( const Reference< XOutputStream >& aStream ) override;
+ virtual Reference< XOutputStream > SAL_CALL getOutputStream( ) override;
+
+ // Methods XServiceInfo
+ virtual OUString SAL_CALL getImplementationName() override;
+ virtual Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+ virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+};
+
+}
+
+OTextOutputStream::OTextOutputStream()
+ : mbEncodingInitialized(false)
+ , mConvUnicode2Text(nullptr)
+ , mContextUnicode2Text(nullptr)
+{
+}
+
+OTextOutputStream::~OTextOutputStream()
+{
+ if( mbEncodingInitialized )
+ {
+ rtl_destroyUnicodeToTextContext( mConvUnicode2Text, mContextUnicode2Text );
+ rtl_destroyUnicodeToTextConverter( mConvUnicode2Text );
+ }
+}
+
+Sequence<sal_Int8> OTextOutputStream::implConvert( const OUString& rSource )
+{
+ const sal_Unicode *puSource = rSource.getStr();
+ sal_Int32 nSourceSize = rSource.getLength();
+
+ sal_Size nTargetCount = 0;
+ sal_Size nSourceCount = 0;
+
+ sal_uInt32 uiInfo;
+ sal_Size nSrcCvtChars;
+
+ // take nSourceSize * 3 as preference
+ // this is an upper boundary for converting to utf8,
+ // which most often used as the target.
+ sal_Int32 nSeqSize = nSourceSize * 3;
+
+ Sequence<sal_Int8> seqText( nSeqSize );
+ char *pTarget = reinterpret_cast<char *>(seqText.getArray());
+ while( true )
+ {
+ nTargetCount += rtl_convertUnicodeToText(
+ mConvUnicode2Text,
+ mContextUnicode2Text,
+ &( puSource[nSourceCount] ),
+ nSourceSize - nSourceCount ,
+ &( pTarget[nTargetCount] ),
+ nSeqSize - nTargetCount,
+ RTL_UNICODETOTEXT_FLAGS_UNDEFINED_DEFAULT |
+ RTL_UNICODETOTEXT_FLAGS_INVALID_DEFAULT ,
+ &uiInfo,
+ &nSrcCvtChars);
+ nSourceCount += nSrcCvtChars;
+
+ if( uiInfo & RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL )
+ {
+ nSeqSize *= 2;
+ seqText.realloc( nSeqSize ); // double array size
+ pTarget = reinterpret_cast<char*>(seqText.getArray());
+ continue;
+ }
+ break;
+ }
+
+ // reduce the size of the buffer (fast, no copy necessary)
+ seqText.realloc( nTargetCount );
+ return seqText;
+}
+
+
+// XTextOutputStream
+
+void OTextOutputStream::writeString( const OUString& aString )
+{
+ checkOutputStream();
+ if( !mbEncodingInitialized )
+ {
+ setEncoding( "utf8" );
+ }
+ if( !mbEncodingInitialized )
+ return;
+
+ Sequence<sal_Int8> aByteSeq = implConvert( aString );
+ mxStream->writeBytes( aByteSeq );
+}
+
+void OTextOutputStream::setEncoding( const OUString& Encoding )
+{
+ OString aOEncodingStr = OUStringToOString( Encoding, RTL_TEXTENCODING_ASCII_US );
+ rtl_TextEncoding encoding = rtl_getTextEncodingFromMimeCharset( aOEncodingStr.getStr() );
+ if( RTL_TEXTENCODING_DONTKNOW == encoding )
+ return;
+
+ mbEncodingInitialized = true;
+ mConvUnicode2Text = rtl_createUnicodeToTextConverter( encoding );
+ mContextUnicode2Text = rtl_createUnicodeToTextContext( mConvUnicode2Text );
+}
+
+
+// XOutputStream
+void OTextOutputStream::writeBytes( const Sequence< sal_Int8 >& aData )
+{
+ checkOutputStream();
+ mxStream->writeBytes( aData );
+}
+
+void OTextOutputStream::flush( )
+{
+ checkOutputStream();
+ mxStream->flush();
+}
+
+void OTextOutputStream::closeOutput( )
+{
+ checkOutputStream();
+ mxStream->closeOutput();
+}
+
+
+void OTextOutputStream::checkOutputStream() const
+{
+ if (! mxStream.is() )
+ throw IOException("output stream is not initialized, you have to use setOutputStream first");
+}
+
+
+// XActiveDataSource
+
+void OTextOutputStream::setOutputStream( const Reference< XOutputStream >& aStream )
+{
+ mxStream = aStream;
+}
+
+Reference< XOutputStream > OTextOutputStream::getOutputStream()
+{
+ return mxStream;
+}
+
+OUString OTextOutputStream::getImplementationName()
+{
+ return "com.sun.star.comp.io.TextOutputStream";
+}
+
+sal_Bool OTextOutputStream::supportsService(const OUString& ServiceName)
+{
+ return cppu::supportsService(this, ServiceName);
+}
+
+Sequence< OUString > OTextOutputStream::getSupportedServiceNames()
+{
+ return { "com.sun.star.io.TextOutputStream" };
+}
+
+
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+io_OTextOutputStream_get_implementation(
+ css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
+{
+ return cppu::acquire(new OTextOutputStream());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */