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, 959 insertions, 0 deletions

diff --git a/sax/source/expatwrap/sax_expat.cxx b/sax/source/expatwrap/sax_expat.cxx
new file mode 100644
index 000000000..b80ebf033
--- /dev/null
+++ b/sax/source/expatwrap/sax_expat.cxx
@@ -0,0 +1,959 @@
+/* -*- 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 <string.h>
+#include <cassert>
+#include <memory>
+#include <utility>
+#include <vector>
+
+
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/xml/sax/XExtendedDocumentHandler.hpp>
+#include <com/sun/star/xml/sax/XParser.hpp>
+#include <com/sun/star/xml/sax/SAXParseException.hpp>
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+
+#include <comphelper/attributelist.hxx>
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <rtl/ref.hxx>
+#include <sal/log.hxx>
+
+#include <expat.h>
+
+using namespace ::std;
+using namespace ::osl;
+using namespace ::cppu;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::xml::sax;
+using namespace ::com::sun::star::io;
+
+#include <xml2utf.hxx>
+
+namespace {
+
+#define XML_CHAR_TO_OUSTRING(x) OUString(x , strlen( x ), RTL_TEXTENCODING_UTF8)
+#define XML_CHAR_N_TO_USTRING(x,n) OUString(x,n, RTL_TEXTENCODING_UTF8 )
+
+
+/*
+* The following macro encapsulates any call to an event handler.
+* It ensures, that exceptions thrown by the event handler are
+* treated properly.
+*/
+#define CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS(pThis,call) \
+    if( ! pThis->bExceptionWasThrown ) { \
+        try {\
+            pThis->call;\
+        }\
+        catch( const SAXParseException &e ) {\
+            callErrorHandler( pThis ,  e );\
+         }\
+        catch( const SAXException &e ) {\
+            callErrorHandler( pThis , SAXParseException(\
+                                            e.Message, \
+                                            e.Context, \
+                                            e.WrappedException,\
+                                            pThis->rDocumentLocator->getPublicId(),\
+                                            pThis->rDocumentLocator->getSystemId(),\
+                                            pThis->rDocumentLocator->getLineNumber(),\
+                                            pThis->rDocumentLocator->getColumnNumber()\
+                                     ) );\
+        }\
+        catch( const css::uno::RuntimeException &e ) {\
+            pThis->bExceptionWasThrown = true; \
+            pThis->bRTExceptionWasThrown = true; \
+            pImpl->rtexception = e; \
+        }\
+        catch( const css::uno::Exception &e ) {\
+            pThis->bExceptionWasThrown = true; \
+            pThis->bRTExceptionWasThrown = true; \
+            pImpl->rtexception = WrappedTargetRuntimeException("Non-runtime UNO exception caught during parse", e.Context, makeAny(e)); \
+        }\
+    }\
+    ((void)0)
+
+
+class SaxExpatParser_Impl;
+
+// This class implements the external Parser interface
+class SaxExpatParser
+    : public WeakImplHelper< XInitialization
+                            , XServiceInfo
+                            , XParser >
+{
+
+public:
+    SaxExpatParser();
+
+    // css::lang::XInitialization:
+    virtual void SAL_CALL initialize(css::uno::Sequence<css::uno::Any> const& rArguments) override;
+
+    // The SAX-Parser-Interface
+    virtual void SAL_CALL parseStream(  const InputSource& structSource) override;
+    virtual void SAL_CALL setDocumentHandler(const css::uno::Reference< XDocumentHandler > & xHandler) override;
+
+    virtual void SAL_CALL setErrorHandler(const css::uno::Reference< XErrorHandler > & xHandler) override;
+    virtual void SAL_CALL setDTDHandler(const css::uno::Reference < XDTDHandler > & xHandler) override;
+    virtual void SAL_CALL setEntityResolver(const css::uno::Reference<  XEntityResolver >& xResolver) override;
+
+    virtual void SAL_CALL setLocale( const Locale &locale ) override;
+
+public: // XServiceInfo
+    OUString                     SAL_CALL getImplementationName() override;
+    css::uno::Sequence< OUString >         SAL_CALL getSupportedServiceNames() override;
+    sal_Bool                     SAL_CALL supportsService(const OUString& ServiceName) override;
+
+private:
+    std::unique_ptr<SaxExpatParser_Impl>   m_pImpl;
+};
+
+
+// Entity binds all information needed for a single file
+struct Entity
+{
+    InputSource         structSource;
+    XML_Parser          pParser;
+    sax_expatwrap::XMLFile2UTFConverter converter;
+};
+
+
+static constexpr OUStringLiteral gsCDATA = "CDATA";
+
+class SaxExpatParser_Impl
+{
+public: // module scope
+    Mutex               aMutex;
+    bool m_bEnableDoS; // fdo#60471 thank you Adobe Illustrator
+
+    css::uno::Reference< XDocumentHandler >   rDocumentHandler;
+    css::uno::Reference< XExtendedDocumentHandler > rExtendedDocumentHandler;
+
+    css::uno::Reference< XErrorHandler >  rErrorHandler;
+    css::uno::Reference< XDTDHandler >    rDTDHandler;
+    css::uno::Reference< XEntityResolver > rEntityResolver;
+    css::uno::Reference < XLocator >      rDocumentLocator;
+
+
+    rtl::Reference < comphelper::AttributeList > rAttrList;
+
+    // External entity stack
+    vector<struct Entity>   vecEntity;
+    void pushEntity( Entity &&entity )
+        { vecEntity.push_back( std::move(entity) ); }
+    void popEntity()
+        { vecEntity.pop_back( ); }
+    struct Entity &getEntity()
+        { return vecEntity.back(); }
+
+
+    // Exception cannot be thrown through the C-XmlParser (possible resource leaks),
+    // therefore the exception must be saved somewhere.
+    SAXParseException   exception;
+    css::uno::RuntimeException    rtexception;
+    bool                bExceptionWasThrown;
+    bool                bRTExceptionWasThrown;
+
+public:
+    SaxExpatParser_Impl()
+        : m_bEnableDoS(false)
+        , bExceptionWasThrown(false)
+        , bRTExceptionWasThrown(false)
+    {
+    }
+
+    // the C-Callbacks for the expat parser
+    void static callbackStartElement(void *userData, const XML_Char *name , const XML_Char **atts);
+    void static callbackEndElement(void *userData, const XML_Char *name);
+    void static callbackCharacters( void *userData , const XML_Char *s , int nLen );
+    void static callbackProcessingInstruction(  void *userData ,
+                                                const XML_Char *sTarget ,
+                                                const XML_Char *sData );
+
+    void static callbackEntityDecl( void *userData ,
+                                    const XML_Char *entityName,
+                                    int is_parameter_entity,
+                                    const XML_Char *value,
+                                    int value_length,
+                                    const XML_Char *base,
+                                    const XML_Char *systemId,
+                                    const XML_Char *publicId,
+                                    const XML_Char *notationName);
+
+    void static callbackNotationDecl(   void *userData,
+                                        const XML_Char *notationName,
+                                        const XML_Char *base,
+                                        const XML_Char *systemId,
+                                        const XML_Char *publicId);
+
+    bool static callbackExternalEntityRef(   XML_Parser parser,
+                                            const XML_Char *openEntityNames,
+                                            const XML_Char *base,
+                                            const XML_Char *systemId,
+                                            const XML_Char *publicId);
+
+    int static callbackUnknownEncoding(void *encodingHandlerData,
+                                                  const XML_Char *name,
+                                                  XML_Encoding *info);
+
+    void static callbackDefault( void *userData,  const XML_Char *s,  int len);
+
+    void static callbackStartCDATA( void *userData );
+    void static callbackEndCDATA( void *userData );
+    void static callbackComment( void *userData , const XML_Char *s );
+    void static callErrorHandler( SaxExpatParser_Impl *pImpl , const SAXParseException &e );
+
+public:
+    void parse();
+};
+
+extern "C"
+{
+    static void call_callbackStartElement(void *userData, const XML_Char *name , const XML_Char **atts)
+    {
+        SaxExpatParser_Impl::callbackStartElement(userData,name,atts);
+    }
+    static void call_callbackEndElement(void *userData, const XML_Char *name)
+    {
+        SaxExpatParser_Impl::callbackEndElement(userData,name);
+    }
+    static void call_callbackCharacters( void *userData , const XML_Char *s , int nLen )
+    {
+        SaxExpatParser_Impl::callbackCharacters(userData,s,nLen);
+    }
+    static void call_callbackProcessingInstruction(void *userData,const XML_Char *sTarget,const XML_Char *sData )
+    {
+        SaxExpatParser_Impl::callbackProcessingInstruction(userData,sTarget,sData );
+    }
+    static void call_callbackEntityDecl(void *userData ,
+                                        const XML_Char *entityName,
+                                        int is_parameter_entity,
+                                        const XML_Char *value,
+                                        int value_length,
+                                        const XML_Char *base,
+                                        const XML_Char *systemId,
+                                        const XML_Char *publicId,
+                                        const XML_Char *notationName)
+    {
+        SaxExpatParser_Impl::callbackEntityDecl(userData, entityName,
+                is_parameter_entity, value, value_length,
+                base, systemId, publicId, notationName);
+    }
+    static void call_callbackNotationDecl(void *userData,
+                                          const XML_Char *notationName,
+                                          const XML_Char *base,
+                                          const XML_Char *systemId,
+                                          const XML_Char *publicId)
+    {
+        SaxExpatParser_Impl::callbackNotationDecl(userData,notationName,base,systemId,publicId);
+    }
+    static int call_callbackExternalEntityRef(XML_Parser parser,
+                                              const XML_Char *openEntityNames,
+                                              const XML_Char *base,
+                                              const XML_Char *systemId,
+                                              const XML_Char *publicId)
+    {
+        return SaxExpatParser_Impl::callbackExternalEntityRef(parser,openEntityNames,base,systemId,publicId);
+    }
+    static int call_callbackUnknownEncoding(void *encodingHandlerData,
+                                              const XML_Char *name,
+                                            XML_Encoding *info)
+    {
+        return SaxExpatParser_Impl::callbackUnknownEncoding(encodingHandlerData,name,info);
+    }
+    static void call_callbackDefault( void *userData,  const XML_Char *s,  int len)
+    {
+        SaxExpatParser_Impl::callbackDefault(userData,s,len);
+    }
+    static void call_callbackStartCDATA( void *userData )
+    {
+        SaxExpatParser_Impl::callbackStartCDATA(userData);
+    }
+    static void call_callbackEndCDATA( void *userData )
+    {
+        SaxExpatParser_Impl::callbackEndCDATA(userData);
+    }
+    static void call_callbackComment( void *userData , const XML_Char *s )
+    {
+        SaxExpatParser_Impl::callbackComment(userData,s);
+    }
+}
+
+
+// LocatorImpl
+
+class LocatorImpl :
+    public WeakImplHelper< XLocator, css::io::XSeekable >
+    // should use a different interface for stream positions!
+{
+public:
+    explicit LocatorImpl(SaxExpatParser_Impl *p)
+        : m_pParser(p)
+    {
+    }
+
+public: //XLocator
+    virtual sal_Int32 SAL_CALL getColumnNumber() override
+    {
+        return XML_GetCurrentColumnNumber( m_pParser->getEntity().pParser );
+    }
+    virtual sal_Int32 SAL_CALL getLineNumber() override
+    {
+        return XML_GetCurrentLineNumber( m_pParser->getEntity().pParser );
+    }
+    virtual OUString SAL_CALL getPublicId() override
+    {
+        return m_pParser->getEntity().structSource.sPublicId;
+    }
+    virtual OUString SAL_CALL getSystemId() override
+    {
+        return m_pParser->getEntity().structSource.sSystemId;
+    }
+
+    // XSeekable (only for getPosition)
+
+    virtual void SAL_CALL seek( sal_Int64 ) override
+    {
+    }
+    virtual sal_Int64 SAL_CALL getPosition() override
+    {
+        return XML_GetCurrentByteIndex( m_pParser->getEntity().pParser );
+    }
+    virtual ::sal_Int64 SAL_CALL getLength() override
+    {
+        return 0;
+    }
+
+private:
+
+    SaxExpatParser_Impl *m_pParser;
+};
+
+
+SaxExpatParser::SaxExpatParser(  )
+{
+    m_pImpl.reset( new SaxExpatParser_Impl );
+
+    LocatorImpl *pLoc = new LocatorImpl( m_pImpl.get() );
+    m_pImpl->rDocumentLocator.set( pLoc );
+
+    // Performance-improvement; handing out the same object with every call of
+    // the startElement callback is allowed (see sax-specification):
+    m_pImpl->rAttrList = new comphelper::AttributeList;
+
+    m_pImpl->bExceptionWasThrown = false;
+    m_pImpl->bRTExceptionWasThrown = false;
+}
+
+// css::lang::XInitialization:
+void SAL_CALL
+SaxExpatParser::initialize(css::uno::Sequence< css::uno::Any > const& rArguments)
+{
+    // possible arguments: a string "DoSmeplease"
+    if (rArguments.hasElements())
+    {
+        OUString str;
+        if ((rArguments[0] >>= str) && "DoSmeplease" == str)
+        {
+            MutexGuard guard( m_pImpl->aMutex );
+            m_pImpl->m_bEnableDoS = true;
+        }
+    }
+}
+
+class ParserCleanup
+{
+private:
+    SaxExpatParser_Impl& m_rParser;
+    XML_Parser m_xmlParser;
+public:
+    ParserCleanup(SaxExpatParser_Impl& rParser, XML_Parser xmlParser)
+        : m_rParser(rParser)
+        , m_xmlParser(xmlParser)
+    {
+    }
+    ~ParserCleanup()
+    {
+        m_rParser.popEntity();
+        //XML_ParserFree accepts a null arg
+        XML_ParserFree(m_xmlParser);
+    }
+};
+
+/***************
+*
+* parseStream does Parser-startup initializations. The SaxExpatParser_Impl::parse() method does
+* the file-specific initialization work. (During a parser run, external files may be opened)
+*
+****************/
+void SaxExpatParser::parseStream(   const InputSource& structSource)
+{
+    // Only one text at one time
+    MutexGuard guard( m_pImpl->aMutex );
+
+
+    struct Entity entity;
+    entity.structSource = structSource;
+
+    if( ! entity.structSource.aInputStream.is() )
+    {
+        throw SAXException("No input source",
+                            css::uno::Reference< css::uno::XInterface > () , css::uno::Any() );
+    }
+
+    entity.converter.setInputStream( entity.structSource.aInputStream );
+    if( !entity.structSource.sEncoding.isEmpty() )
+    {
+        entity.converter.setEncoding(
+            OUStringToOString( entity.structSource.sEncoding , RTL_TEXTENCODING_ASCII_US ) );
+    }
+
+    // create parser with proper encoding
+    entity.pParser = XML_ParserCreate( nullptr );
+    if( ! entity.pParser )
+    {
+        throw SAXException("Couldn't create parser",
+                            css::uno::Reference< css::uno::XInterface > (), css::uno::Any() );
+    }
+
+    // set all necessary C-Callbacks
+    XML_SetUserData( entity.pParser, m_pImpl.get() );
+    XML_SetElementHandler(  entity.pParser ,
+                            call_callbackStartElement ,
+                            call_callbackEndElement );
+    XML_SetCharacterDataHandler( entity.pParser , call_callbackCharacters );
+    XML_SetProcessingInstructionHandler(entity.pParser ,
+                                        call_callbackProcessingInstruction );
+    if (!m_pImpl->m_bEnableDoS)
+    {
+        XML_SetEntityDeclHandler(entity.pParser, call_callbackEntityDecl);
+    }
+    XML_SetNotationDeclHandler( entity.pParser, call_callbackNotationDecl );
+    XML_SetExternalEntityRefHandler(    entity.pParser,
+                                        call_callbackExternalEntityRef);
+    XML_SetUnknownEncodingHandler( entity.pParser,  call_callbackUnknownEncoding ,nullptr);
+
+    if( m_pImpl->rExtendedDocumentHandler.is() ) {
+
+        // These handlers just delegate calls to the ExtendedHandler. If no extended handler is
+        // given, these callbacks can be ignored
+        XML_SetDefaultHandlerExpand( entity.pParser, call_callbackDefault );
+        XML_SetCommentHandler( entity.pParser, call_callbackComment );
+        XML_SetCdataSectionHandler(     entity.pParser ,
+                                        call_callbackStartCDATA ,
+                                         call_callbackEndCDATA );
+    }
+
+
+    m_pImpl->exception = SAXParseException();
+    auto const xmlParser = entity.pParser;
+    m_pImpl->pushEntity( std::move(entity) );
+
+    ParserCleanup aEnsureFree(*m_pImpl, xmlParser);
+
+    // start the document
+    if( m_pImpl->rDocumentHandler.is() ) {
+        m_pImpl->rDocumentHandler->setDocumentLocator( m_pImpl->rDocumentLocator );
+        m_pImpl->rDocumentHandler->startDocument();
+    }
+
+    m_pImpl->parse();
+
+    // finish document
+    if( m_pImpl->rDocumentHandler.is() ) {
+        m_pImpl->rDocumentHandler->endDocument();
+    }
+}
+
+void SaxExpatParser::setDocumentHandler(const css::uno::Reference< XDocumentHandler > & xHandler)
+{
+    m_pImpl->rDocumentHandler = xHandler;
+    m_pImpl->rExtendedDocumentHandler =
+        css::uno::Reference< XExtendedDocumentHandler >( xHandler , css::uno::UNO_QUERY );
+}
+
+void SaxExpatParser::setErrorHandler(const css::uno::Reference< XErrorHandler > & xHandler)
+{
+    m_pImpl->rErrorHandler = xHandler;
+}
+
+void SaxExpatParser::setDTDHandler(const css::uno::Reference< XDTDHandler > & xHandler)
+{
+    m_pImpl->rDTDHandler = xHandler;
+}
+
+void SaxExpatParser::setEntityResolver(const css::uno::Reference < XEntityResolver > & xResolver)
+{
+    m_pImpl->rEntityResolver = xResolver;
+}
+
+
+void SaxExpatParser::setLocale( const Locale & )
+{
+    // not implemented
+}
+
+// XServiceInfo
+OUString SaxExpatParser::getImplementationName()
+{
+    return "com.sun.star.comp.extensions.xml.sax.ParserExpat";
+}
+
+// XServiceInfo
+sal_Bool SaxExpatParser::supportsService(const OUString& ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+// XServiceInfo
+css::uno::Sequence< OUString > SaxExpatParser::getSupportedServiceNames()
+{
+    return { "com.sun.star.xml.sax.Parser" };
+}
+
+
+/*---------------------------------------
+*
+* Helper functions and classes
+*
+*
+*-------------------------------------------*/
+OUString getErrorMessage( XML_Error xmlE, const OUString& sSystemId , sal_Int32 nLine )
+{
+    OUString Message;
+    if( XML_ERROR_NONE == xmlE ) {
+        Message = "No";
+    }
+    else if( XML_ERROR_NO_MEMORY == xmlE ) {
+        Message = "no memory";
+    }
+    else if( XML_ERROR_SYNTAX == xmlE ) {
+        Message = "syntax";
+    }
+    else if( XML_ERROR_NO_ELEMENTS == xmlE ) {
+        Message = "no elements";
+    }
+    else if( XML_ERROR_INVALID_TOKEN == xmlE ) {
+        Message = "invalid token";
+    }
+    else if( XML_ERROR_UNCLOSED_TOKEN == xmlE ) {
+        Message = "unclosed token";
+    }
+    else if( XML_ERROR_PARTIAL_CHAR == xmlE ) {
+        Message = "partial char";
+    }
+    else if( XML_ERROR_TAG_MISMATCH == xmlE ) {
+        Message = "tag mismatch";
+    }
+    else if( XML_ERROR_DUPLICATE_ATTRIBUTE == xmlE ) {
+        Message = "duplicate attribute";
+    }
+    else if( XML_ERROR_JUNK_AFTER_DOC_ELEMENT == xmlE ) {
+        Message = "junk after doc element";
+    }
+    else if( XML_ERROR_PARAM_ENTITY_REF == xmlE ) {
+        Message = "parameter entity reference";
+    }
+    else if( XML_ERROR_UNDEFINED_ENTITY == xmlE ) {
+        Message = "undefined entity";
+    }
+    else if( XML_ERROR_RECURSIVE_ENTITY_REF == xmlE ) {
+        Message = "recursive entity reference";
+    }
+    else if( XML_ERROR_ASYNC_ENTITY == xmlE ) {
+        Message = "async entity";
+    }
+    else if( XML_ERROR_BAD_CHAR_REF == xmlE ) {
+        Message = "bad char reference";
+    }
+    else if( XML_ERROR_BINARY_ENTITY_REF == xmlE ) {
+        Message = "binary entity reference";
+    }
+    else if( XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF == xmlE ) {
+        Message = "attribute external entity reference";
+    }
+    else if( XML_ERROR_MISPLACED_XML_PI == xmlE ) {
+        Message = "misplaced xml processing instruction";
+    }
+    else if( XML_ERROR_UNKNOWN_ENCODING == xmlE ) {
+        Message = "unknown encoding";
+    }
+    else if( XML_ERROR_INCORRECT_ENCODING == xmlE ) {
+        Message = "incorrect encoding";
+    }
+    else if( XML_ERROR_UNCLOSED_CDATA_SECTION == xmlE ) {
+        Message = "unclosed cdata section";
+    }
+    else if( XML_ERROR_EXTERNAL_ENTITY_HANDLING == xmlE ) {
+        Message = "external entity reference";
+    }
+    else if( XML_ERROR_NOT_STANDALONE == xmlE ) {
+        Message = "not standalone";
+    }
+
+    OUString str = "[" +
+        sSystemId +
+        " line " +
+        OUString::number( nLine ) +
+        "]: " +
+        Message +
+        "error";
+
+    return str;
+}
+
+
+// starts parsing with actual parser !
+void SaxExpatParser_Impl::parse( )
+{
+    const int nBufSize = 16*1024;
+
+    int nRead   = nBufSize;
+    css::uno::Sequence< sal_Int8 > seqOut(nBufSize);
+
+    while( nRead ) {
+        nRead = getEntity().converter.readAndConvert( seqOut , nBufSize );
+
+        bool bContinue(false);
+
+        if( ! nRead ) {
+            // last call - must return OK
+            XML_Status const ret = XML_Parse( getEntity().pParser,
+                                   reinterpret_cast<const char *>(seqOut.getConstArray()),
+                                   0 ,
+                                   1 );
+            if (ret == XML_STATUS_OK) {
+                break;
+            }
+        } else {
+            bContinue = ( XML_Parse( getEntity().pParser,
+                                                reinterpret_cast<const char *>(seqOut.getConstArray()),
+                                                nRead,
+                                                0 ) != XML_STATUS_ERROR );
+        }
+
+        if( ! bContinue || bExceptionWasThrown ) {
+
+            if ( bRTExceptionWasThrown )
+                throw rtexception;
+
+            // Error during parsing !
+            XML_Error xmlE = XML_GetErrorCode( getEntity().pParser );
+            OUString sSystemId = rDocumentLocator->getSystemId();
+            sal_Int32 nLine = rDocumentLocator->getLineNumber();
+
+            SAXParseException aExcept(
+                getErrorMessage(xmlE , sSystemId, nLine) ,
+                css::uno::Reference< css::uno::XInterface >(),
+                css::uno::Any( &exception , cppu::UnoType<decltype(exception)>::get() ),
+                rDocumentLocator->getPublicId(),
+                rDocumentLocator->getSystemId(),
+                rDocumentLocator->getLineNumber(),
+                rDocumentLocator->getColumnNumber()
+                );
+
+            if( rErrorHandler.is() ) {
+
+                // error handler is set, so the handler may throw the exception
+                css::uno::Any a;
+                a <<= aExcept;
+                rErrorHandler->fatalError( a );
+            }
+
+            // Error handler has not thrown an exception, but parsing cannot go on,
+            // so an exception MUST be thrown.
+            throw aExcept;
+        } // if( ! bContinue )
+    } // while
+}
+
+
+// The C-Callbacks
+
+
+void SaxExpatParser_Impl::callbackStartElement( void *pvThis ,
+                                                const XML_Char *pwName ,
+                                                const XML_Char **awAttributes )
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+
+    if( !pImpl->rDocumentHandler.is() )
+        return;
+
+    int i = 0;
+    pImpl->rAttrList->Clear();
+
+    while( awAttributes[i] ) {
+        assert(awAttributes[i+1]);
+        pImpl->rAttrList->AddAttribute(
+            XML_CHAR_TO_OUSTRING( awAttributes[i] ) ,
+            gsCDATA,  // expat doesn't know types
+            XML_CHAR_TO_OUSTRING( awAttributes[i+1] ) );
+        i +=2;
+    }
+
+    CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS(
+        pImpl ,
+        rDocumentHandler->startElement( XML_CHAR_TO_OUSTRING( pwName ) ,
+                                        pImpl->rAttrList.get() ) );
+}
+
+void SaxExpatParser_Impl::callbackEndElement( void *pvThis , const XML_Char *pwName  )
+{
+    SaxExpatParser_Impl  *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+
+    if( pImpl->rDocumentHandler.is() ) {
+        CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS( pImpl,
+                rDocumentHandler->endElement( XML_CHAR_TO_OUSTRING( pwName ) ) );
+    }
+}
+
+
+void SaxExpatParser_Impl::callbackCharacters( void *pvThis , const XML_Char *s , int nLen )
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+
+    if( pImpl->rDocumentHandler.is() ) {
+        CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS( pImpl ,
+                rDocumentHandler->characters( XML_CHAR_N_TO_USTRING(s,nLen) ) );
+    }
+}
+
+void SaxExpatParser_Impl::callbackProcessingInstruction(    void *pvThis,
+                                                    const XML_Char *sTarget ,
+                                                    const XML_Char *sData )
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+    if( pImpl->rDocumentHandler.is() ) {
+        CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS(
+                    pImpl ,
+                    rDocumentHandler->processingInstruction( XML_CHAR_TO_OUSTRING( sTarget ),
+                    XML_CHAR_TO_OUSTRING( sData ) ) );
+    }
+}
+
+
+void SaxExpatParser_Impl::callbackEntityDecl(
+    void *pvThis, const XML_Char *entityName,
+    SAL_UNUSED_PARAMETER int /*is_parameter_entity*/,
+    const XML_Char *value, SAL_UNUSED_PARAMETER int /*value_length*/,
+    SAL_UNUSED_PARAMETER const XML_Char * /*base*/, const XML_Char *systemId,
+    const XML_Char *publicId, const XML_Char *notationName)
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+    if (value) { // value != 0 means internal entity
+        SAL_INFO("sax","SaxExpatParser: internal entity declaration, stopping");
+        XML_StopParser(pImpl->getEntity().pParser, XML_FALSE);
+        pImpl->exception = SAXParseException(
+            "SaxExpatParser: internal entity declaration, stopping",
+            nullptr, css::uno::Any(),
+            pImpl->rDocumentLocator->getPublicId(),
+            pImpl->rDocumentLocator->getSystemId(),
+            pImpl->rDocumentLocator->getLineNumber(),
+            pImpl->rDocumentLocator->getColumnNumber() );
+        pImpl->bExceptionWasThrown = true;
+    } else {
+        if( pImpl->rDTDHandler.is() ) {
+            CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS(
+                pImpl ,
+                rDTDHandler->unparsedEntityDecl(
+                    XML_CHAR_TO_OUSTRING( entityName ),
+                    XML_CHAR_TO_OUSTRING( publicId ) ,
+                    XML_CHAR_TO_OUSTRING( systemId ) ,
+                    XML_CHAR_TO_OUSTRING( notationName ) ) );
+        }
+    }
+}
+
+void SaxExpatParser_Impl::callbackNotationDecl(
+    void *pvThis, const XML_Char *notationName,
+    SAL_UNUSED_PARAMETER const XML_Char * /*base*/, const XML_Char *systemId,
+    const XML_Char *publicId)
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+    if( pImpl->rDTDHandler.is() ) {
+        CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS( pImpl,
+                rDTDHandler->notationDecl(  XML_CHAR_TO_OUSTRING( notationName ) ,
+                                            XML_CHAR_TO_OUSTRING( publicId ) ,
+                                            XML_CHAR_TO_OUSTRING( systemId ) ) );
+    }
+
+}
+
+
+bool SaxExpatParser_Impl::callbackExternalEntityRef(
+    XML_Parser parser, const XML_Char *context,
+    SAL_UNUSED_PARAMETER const XML_Char * /*base*/, const XML_Char *systemId,
+    const XML_Char *publicId)
+{
+    bool bOK = true;
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(XML_GetUserData( parser ));
+
+    struct Entity entity;
+
+    if( pImpl->rEntityResolver.is() ) {
+        try
+        {
+            entity.structSource = pImpl->rEntityResolver->resolveEntity(
+                XML_CHAR_TO_OUSTRING( publicId ) ,
+                XML_CHAR_TO_OUSTRING( systemId ) );
+        }
+        catch( const SAXParseException & e )
+        {
+            pImpl->exception = e;
+            bOK = false;
+        }
+        catch( const SAXException & e )
+        {
+            pImpl->exception = SAXParseException(
+                e.Message , e.Context , e.WrappedException ,
+                pImpl->rDocumentLocator->getPublicId(),
+                pImpl->rDocumentLocator->getSystemId(),
+                pImpl->rDocumentLocator->getLineNumber(),
+                pImpl->rDocumentLocator->getColumnNumber() );
+            bOK = false;
+        }
+    }
+
+    if( entity.structSource.aInputStream.is() ) {
+        entity.pParser = XML_ExternalEntityParserCreate( parser , context, nullptr );
+        if( ! entity.pParser )
+        {
+            return false;
+        }
+
+        entity.converter.setInputStream( entity.structSource.aInputStream );
+        auto const xmlParser = entity.pParser;
+        pImpl->pushEntity( std::move(entity) );
+        try
+        {
+            pImpl->parse();
+        }
+        catch( const SAXParseException & e )
+        {
+            pImpl->exception = e;
+            bOK = false;
+        }
+        catch( const IOException &e )
+        {
+            pImpl->exception.WrappedException <<= e;
+            bOK = false;
+        }
+        catch( const css::uno::RuntimeException &e )
+        {
+            pImpl->exception.WrappedException <<=e;
+            bOK = false;
+        }
+
+        pImpl->popEntity();
+
+        XML_ParserFree( xmlParser );
+    }
+
+    return bOK;
+}
+
+int SaxExpatParser_Impl::callbackUnknownEncoding(
+    SAL_UNUSED_PARAMETER void * /*encodingHandlerData*/,
+    SAL_UNUSED_PARAMETER const XML_Char * /*name*/,
+    SAL_UNUSED_PARAMETER XML_Encoding * /*info*/)
+{
+    return 0;
+}
+
+void SaxExpatParser_Impl::callbackDefault( void *pvThis,  const XML_Char *s,  int len)
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+
+    CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS(  pImpl,
+                rExtendedDocumentHandler->unknown( XML_CHAR_N_TO_USTRING( s ,len) ) );
+}
+
+void SaxExpatParser_Impl::callbackComment( void *pvThis , const XML_Char *s )
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+    CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS( pImpl,
+                rExtendedDocumentHandler->comment( XML_CHAR_TO_OUSTRING( s ) ) );
+}
+
+void SaxExpatParser_Impl::callbackStartCDATA( void *pvThis )
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+
+    CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS( pImpl, rExtendedDocumentHandler->startCDATA() );
+}
+
+
+void SaxExpatParser_Impl::callErrorHandler( SaxExpatParser_Impl *pImpl ,
+                                            const SAXParseException & e )
+{
+    try
+    {
+        if( pImpl->rErrorHandler.is() ) {
+            css::uno::Any a;
+            a <<= e;
+            pImpl->rErrorHandler->error( a );
+        }
+        else {
+            pImpl->exception = e;
+            pImpl->bExceptionWasThrown = true;
+        }
+    }
+    catch( const SAXParseException & ex ) {
+        pImpl->exception = ex;
+        pImpl->bExceptionWasThrown = true;
+    }
+    catch( const SAXException & ex ) {
+        pImpl->exception = SAXParseException(
+                                    ex.Message,
+                                    ex.Context,
+                                    ex.WrappedException,
+                                    pImpl->rDocumentLocator->getPublicId(),
+                                    pImpl->rDocumentLocator->getSystemId(),
+                                    pImpl->rDocumentLocator->getLineNumber(),
+                                    pImpl->rDocumentLocator->getColumnNumber()
+                             );
+        pImpl->bExceptionWasThrown = true;
+    }
+}
+
+void SaxExpatParser_Impl::callbackEndCDATA( void *pvThis )
+{
+    SaxExpatParser_Impl *pImpl = static_cast<SaxExpatParser_Impl*>(pvThis);
+
+    CALL_ELEMENT_HANDLER_AND_CARE_FOR_EXCEPTIONS(pImpl,rExtendedDocumentHandler->endCDATA() );
+}
+
+} // namespace
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_extensions_xml_sax_ParserExpat_get_implementation(
+    css::uno::XComponentContext *,
+    css::uno::Sequence<css::uno::Any> const &)
+{
+    return cppu::acquire(new SaxExpatParser);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */