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, 699 insertions, 0 deletions

diff --git a/sdext/source/pdfimport/pdfparse/pdfparse.cxx b/sdext/source/pdfimport/pdfparse/pdfparse.cxx
new file mode 100644
index 000000000..e61d90088
--- /dev/null
+++ b/sdext/source/pdfimport/pdfparse/pdfparse.cxx
@@ -0,0 +1,699 @@
+/* -*- 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 <pdfparse.hxx>
+
+// boost using obsolete stuff
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable:4996)
+#pragma warning(disable:4503)
+#endif
+
+// workaround windows compiler: do not include multi_pass.hpp
+#include <boost/spirit/include/classic_core.hpp>
+#include <boost/spirit/include/classic_utility.hpp>
+#include <boost/spirit/include/classic_error_handling.hpp>
+#include <boost/spirit/include/classic_file_iterator.hpp>
+#include <boost/bind.hpp>
+
+#include <string.h>
+
+#include <o3tl/safeint.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+
+// disable warnings again because someone along the line has enabled them
+// (we have  included boost headers, what did you expect?)
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable:4996)
+#pragma warning(disable:4503)
+#endif
+
+
+using namespace boost::spirit::classic;
+using namespace pdfparse;
+
+namespace {
+
+class StringEmitContext : public EmitContext
+{
+    OStringBuffer m_aBuf;
+    public:
+    StringEmitContext() : EmitContext(), m_aBuf(256) {}
+
+    virtual bool write( const void* pBuf, unsigned int nLen ) throw() override
+    {
+        m_aBuf.append( static_cast<const char*>(pBuf), nLen );
+        return true;
+    }
+    virtual unsigned int getCurPos() throw() override { return m_aBuf.getLength(); }
+    virtual bool copyOrigBytes( unsigned int nOrigOffset, unsigned int nLen ) throw() override
+    { return (nOrigOffset+nLen < o3tl::make_unsigned(m_aBuf.getLength()) ) &&
+             write( m_aBuf.getStr() + nOrigOffset, nLen ); }
+    virtual unsigned int readOrigBytes( unsigned int nOrigOffset, unsigned int nLen, void* pBuf ) throw() override
+    {
+        if( nOrigOffset+nLen < o3tl::make_unsigned(m_aBuf.getLength()) )
+        {
+            memcpy( pBuf, m_aBuf.getStr()+nOrigOffset, nLen );
+            return nLen;
+        }
+        return 0;
+    }
+
+    OString getString() { return m_aBuf.makeStringAndClear(); }
+};
+
+template< class iteratorT >
+class PDFGrammar :  public grammar< PDFGrammar<iteratorT> >
+{
+public:
+
+    explicit PDFGrammar( const iteratorT& first )
+    : m_fDouble( 0.0 ), m_aGlobalBegin( first ) {}
+    ~PDFGrammar()
+    {
+        if( !m_aObjectStack.empty() )
+            delete m_aObjectStack.front();
+    }
+
+    double m_fDouble;
+    std::vector< unsigned int > m_aUIntStack;
+    std::vector< PDFEntry* >    m_aObjectStack;
+    OString                m_aErrorString;
+    iteratorT                   m_aGlobalBegin;
+
+public:
+    struct pdf_string_parser
+    {
+        typedef nil_t result_t;
+        template <typename ScannerT>
+        std::ptrdiff_t
+        operator()(ScannerT const& scan, result_t&) const
+        {
+            std::ptrdiff_t len = 0;
+
+            int nBraceLevel = 0;
+            while( ! scan.at_end() )
+            {
+                char c = *scan;
+                if( c == ')' )
+                {
+                    nBraceLevel--;
+                    if( nBraceLevel < 0 )
+                        break;
+                }
+                else if( c == '(' )
+                    nBraceLevel++;
+                else if( c == '\\' ) // ignore escaped braces
+                {
+                    ++len;
+                    ++scan.first;                 // tdf#63054: avoid skipping spaces
+                    if( scan.first == scan.last ) // tdf#63054: avoid skipping spaces
+                        break;
+                }
+                ++len;
+                ++scan;
+            }
+            return scan.at_end() ? -1 : len;
+        }
+    };
+
+    template< typename ScannerT >
+    struct definition
+    {
+        explicit definition( const PDFGrammar<iteratorT>& rSelf )
+        {
+            PDFGrammar<iteratorT>* pSelf = const_cast< PDFGrammar<iteratorT>* >( &rSelf );
+
+            // workaround workshop compiler: comment_p doesn't work
+            // comment     = comment_p("%")[boost::bind(&PDFGrammar::pushComment, pSelf, _1, _2 )];
+            comment     = lexeme_d[ (ch_p('%') >> *(~ch_p('\r') & ~ch_p('\n')) >> eol_p)[boost::bind(&PDFGrammar::pushComment, pSelf, _1, _2 )] ];
+
+            boolean     = (str_p("true") | str_p("false"))[boost::bind(&PDFGrammar::pushBool, pSelf, _1, _2)];
+
+            // workaround workshop compiler: confix_p doesn't work
+            //stream      = confix_p( "stream", *anychar_p, "endstream" )[boost::bind(&PDFGrammar::emitStream, pSelf, _1, _2 )];
+            stream      = (str_p("stream") >> *(anychar_p - str_p("endstream")) >> str_p("endstream"))[boost::bind(&PDFGrammar::emitStream, pSelf, _1, _2 )];
+
+            name        = lexeme_d[
+                            ch_p('/')
+                            >> (*(anychar_p-chset_p("\t\n\f\r ()<>[]{}/%")-ch_p('\0')))
+                               [boost::bind(&PDFGrammar::pushName, pSelf, _1, _2)] ];
+
+            // workaround workshop compiler: confix_p doesn't work
+            //stringtype  = ( confix_p("(",*anychar_p, ")") |
+            //                confix_p("<",*xdigit_p,  ">") )
+            //              [boost::bind(&PDFGrammar::pushString,pSelf, _1, _2)];
+
+            stringtype  = ( ( ch_p('(') >> functor_parser<pdf_string_parser>() >> ch_p(')') ) |
+                            ( ch_p('<') >> *xdigit_p >> ch_p('>') ) )
+                          [boost::bind(&PDFGrammar::pushString,pSelf, _1, _2)];
+
+            null_object = str_p( "null" )[boost::bind(&PDFGrammar::pushNull, pSelf, _1, _2)];
+
+            #ifdef USE_ASSIGN_ACTOR
+            objectref   = ( uint_p[push_back_a(pSelf->m_aUIntStack)]
+                            >> uint_p[push_back_a(pSelf->m_aUIntStack)]
+                            >> ch_p('R')
+                            >> eps_p
+                          )[boost::bind(&PDFGrammar::pushObjectRef, pSelf, _1, _2)];
+            #else
+            objectref   = ( uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)]
+                            >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)]
+                            >> ch_p('R')
+                            >> eps_p
+                          )[boost::bind(&PDFGrammar::pushObjectRef, pSelf, _1, _2)];
+            #endif
+
+            #ifdef USE_ASSIGN_ACTOR
+            simple_type = objectref | name |
+                          ( real_p[assign_a(pSelf->m_fDouble)] >> eps_p )
+                          [boost::bind(&PDFGrammar::pushDouble, pSelf, _1, _2)]
+                          | stringtype | boolean | null_object;
+            #else
+            simple_type = objectref | name |
+                          ( real_p[boost::bind(&PDFGrammar::assign_action_double, pSelf, _1)] >> eps_p )
+                          [boost::bind(&PDFGrammar::pushDouble, pSelf, _1, _2)]
+                          | stringtype | boolean | null_object;
+            #endif
+
+            dict_begin  = str_p( "<<" )[boost::bind(&PDFGrammar::beginDict, pSelf, _1, _2)];
+            dict_end    = str_p( ">>" )[boost::bind(&PDFGrammar::endDict, pSelf, _1, _2)];
+
+            array_begin = str_p("[")[boost::bind(&PDFGrammar::beginArray,pSelf, _1, _2)];
+            array_end   = str_p("]")[boost::bind(&PDFGrammar::endArray,pSelf, _1, _2)];
+
+            #ifdef USE_ASSIGN_ACTOR
+            object_begin= uint_p[push_back_a(pSelf->m_aUIntStack)]
+                          >> uint_p[push_back_a(pSelf->m_aUIntStack)]
+                          >> str_p("obj" )[boost::bind(&PDFGrammar::beginObject, pSelf, _1, _2)];
+            #else
+            object_begin= uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)]
+                          >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)]
+                          >> str_p("obj" )[boost::bind(&PDFGrammar::beginObject, pSelf, _1, _2)];
+            #endif
+            object_end  = str_p( "endobj" )[boost::bind(&PDFGrammar::endObject, pSelf, _1, _2)];
+
+            xref        = str_p( "xref" ) >> uint_p >> uint_p
+                          >> lexeme_d[
+                                +( repeat_p(10)[digit_p]
+                                   >> blank_p
+                                   >> repeat_p(5)[digit_p]
+                                   >> blank_p
+                                   >> ( ch_p('n') | ch_p('f') )
+                                   >> repeat_p(2)[space_p]
+                                 ) ];
+
+            dict_element= dict_begin | comment | simple_type
+                          | array_begin | array_end | dict_end;
+
+            object      = object_begin
+                          >> *dict_element
+                          >> !stream
+                          >> object_end;
+
+            trailer     = str_p( "trailer" )[boost::bind(&PDFGrammar::beginTrailer,pSelf,_1,_2)]
+                          >> *dict_element
+                          >> str_p("startxref")
+                          >> uint_p
+                          >> str_p("%%EOF")[boost::bind(&PDFGrammar::endTrailer,pSelf,_1,_2)];
+
+            #ifdef USE_ASSIGN_ACTOR
+            pdfrule     = ! (lexeme_d[
+                                str_p( "%PDF-" )
+                                >> uint_p[push_back_a(pSelf->m_aUIntStack)]
+                                >> ch_p('.')
+                                >> uint_p[push_back_a(pSelf->m_aUIntStack)]
+                                >> *((~ch_p('\r') & ~ch_p('\n')))
+                                >> eol_p
+                             ])[boost::bind(&PDFGrammar::haveFile,pSelf, _1, _2)]
+                          >> *( comment | object | ( xref >> trailer ) );
+            #else
+            pdfrule     = ! (lexeme_d[
+                                str_p( "%PDF-" )
+                                >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)]
+                                >> ch_p('.')
+                                >> uint_p[boost::bind(&PDFGrammar::push_back_action_uint, pSelf, _1)]
+                                >> *(~ch_p('\r') & ~ch_p('\n'))
+                                >> eol_p
+                             ])[boost::bind(&PDFGrammar::haveFile,pSelf, _1, _2)]
+                          >> *( comment | object | ( xref >> trailer ) );
+            #endif
+        }
+        rule< ScannerT > comment, stream, boolean, name, stringtype, null_object, simple_type,
+                         objectref, array, value, dict_element, dict_begin, dict_end,
+                         array_begin, array_end, object, object_begin, object_end,
+                         xref, trailer, pdfrule;
+
+        const rule< ScannerT >& start() const { return pdfrule; }
+    };
+
+    #ifndef USE_ASSIGN_ACTOR
+    void push_back_action_uint( unsigned int i )
+    {
+        m_aUIntStack.push_back( i );
+    }
+    void assign_action_double( double d )
+    {
+        m_fDouble = d;
+    }
+    #endif
+
+    static void parseError( const char* pMessage, iteratorT pLocation )
+    {
+        throw_( pLocation, pMessage );
+    }
+
+    OString iteratorToString( iteratorT first, iteratorT last ) const
+    {
+        OStringBuffer aStr( 32 );
+        while( first != last )
+        {
+            aStr.append( *first );
+            ++first;
+        }
+        return aStr.makeStringAndClear();
+    }
+
+    void haveFile( iteratorT pBegin, SAL_UNUSED_PARAMETER iteratorT /*pEnd*/ )
+    {
+        if( m_aObjectStack.empty() )
+        {
+            PDFFile* pFile = new PDFFile();
+            pFile->m_nMinor = m_aUIntStack.back();
+            m_aUIntStack.pop_back();
+            pFile->m_nMajor = m_aUIntStack.back();
+            m_aUIntStack.pop_back();
+            m_aObjectStack.push_back( pFile );
+        }
+        else
+            parseError( "found file header in unusual place", pBegin );
+    }
+
+    void pushComment( iteratorT first, iteratorT last )
+    {
+        // add a comment to the current stack element
+        PDFComment* pComment =
+            new PDFComment(iteratorToString(first,last));
+        if( m_aObjectStack.empty() )
+            m_aObjectStack.push_back( new PDFPart() );
+        PDFContainer* pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back());
+        if( pContainer == nullptr )
+            parseError( "comment without container", first );
+        pContainer->m_aSubElements.emplace_back( pComment );
+    }
+
+    void insertNewValue( std::unique_ptr<PDFEntry> pNewValue, iteratorT pPos )
+    {
+        PDFContainer* pContainer = nullptr;
+        const char* pMsg = nullptr;
+        if( ! m_aObjectStack.empty() )
+        {
+            pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back());
+            if (pContainer)
+            {
+                if( dynamic_cast<PDFDict*>(pContainer) == nullptr &&
+                    dynamic_cast<PDFArray*>(pContainer) == nullptr )
+                {
+                    PDFObject* pObj = dynamic_cast<PDFObject*>(pContainer);
+                    if( pObj )
+                    {
+                        if( pObj->m_pObject == nullptr )
+                            pObj->m_pObject = pNewValue.get();
+                        else
+                        {
+                            pMsg = "second value for object";
+                            pContainer = nullptr;
+                        }
+                    }
+                    else if( dynamic_cast<PDFDict*>(pNewValue.get()) )
+                    {
+                        PDFTrailer* pTrailer = dynamic_cast<PDFTrailer*>(pContainer);
+                        if( pTrailer )
+                        {
+                            if( pTrailer->m_pDict == nullptr )
+                                pTrailer->m_pDict = dynamic_cast<PDFDict*>(pNewValue.get());
+                            else
+                                pContainer = nullptr;
+                        }
+                        else
+                            pContainer = nullptr;
+                    }
+                    else
+                        pContainer = nullptr;
+                }
+            }
+        }
+        if( pContainer )
+            pContainer->m_aSubElements.emplace_back( std::move(pNewValue) );
+        else
+        {
+            if( ! pMsg )
+            {
+                if( dynamic_cast<PDFContainer*>(pNewValue.get()) )
+                    pMsg = "array without container";
+                else
+                    pMsg = "value without container";
+            }
+            parseError( pMsg, pPos );
+        }
+    }
+
+    void pushName( iteratorT first, iteratorT last )
+    {
+        insertNewValue( std::make_unique<PDFName>(iteratorToString(first,last)), first );
+    }
+
+    void pushDouble( iteratorT first, SAL_UNUSED_PARAMETER iteratorT /*last*/ )
+    {
+        insertNewValue( std::make_unique<PDFNumber>(m_fDouble), first );
+    }
+
+    void pushString( iteratorT first, iteratorT last )
+    {
+        insertNewValue( std::make_unique<PDFString>(iteratorToString(first,last)), first );
+    }
+
+    void pushBool( iteratorT first, iteratorT last )
+    {
+        insertNewValue( std::make_unique<PDFBool>( last-first == 4 ), first );
+    }
+
+    void pushNull( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        insertNewValue( std::make_unique<PDFNull>(), first );
+    }
+
+
+    void beginObject( iteratorT first, SAL_UNUSED_PARAMETER iteratorT /*last*/ )
+    {
+        if( m_aObjectStack.empty() )
+            m_aObjectStack.push_back( new PDFPart() );
+
+        unsigned int nGeneration = m_aUIntStack.back();
+        m_aUIntStack.pop_back();
+        unsigned int nObject = m_aUIntStack.back();
+        m_aUIntStack.pop_back();
+
+        PDFObject* pObj = new PDFObject( nObject, nGeneration );
+        pObj->m_nOffset = first - m_aGlobalBegin;
+
+        PDFContainer* pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back());
+        if( pContainer &&
+            ( dynamic_cast<PDFFile*>(pContainer) ||
+              dynamic_cast<PDFPart*>(pContainer) ) )
+        {
+            pContainer->m_aSubElements.emplace_back( pObj );
+            m_aObjectStack.push_back( pObj );
+        }
+        else
+            parseError( "object in wrong place", first );
+    }
+
+    void endObject( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        if( m_aObjectStack.empty() )
+            parseError( "endobj without obj", first );
+        else if( dynamic_cast<PDFObject*>(m_aObjectStack.back()) == nullptr )
+            parseError( "spurious endobj", first );
+        else
+            m_aObjectStack.pop_back();
+    }
+
+    void pushObjectRef( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        unsigned int nGeneration = m_aUIntStack.back();
+        m_aUIntStack.pop_back();
+        unsigned int nObject = m_aUIntStack.back();
+        m_aUIntStack.pop_back();
+        insertNewValue( std::make_unique<PDFObjectRef>(nObject,nGeneration), first );
+    }
+
+    void beginDict( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        PDFDict* pDict = new PDFDict();
+        pDict->m_nOffset = first - m_aGlobalBegin;
+
+        insertNewValue( std::unique_ptr<PDFEntry>(pDict), first );
+        // will not come here if insertion fails (exception)
+        m_aObjectStack.push_back( pDict );
+    }
+    void endDict( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        PDFDict* pDict = nullptr;
+        if( m_aObjectStack.empty() )
+            parseError( "dictionary end without begin", first );
+        else if( (pDict = dynamic_cast<PDFDict*>(m_aObjectStack.back())) == nullptr )
+            parseError( "spurious dictionary end", first );
+        else
+            m_aObjectStack.pop_back();
+
+        PDFEntry* pOffender = pDict->buildMap();
+        if( pOffender )
+        {
+            StringEmitContext aCtx;
+            aCtx.write( "offending dictionary element: ", 30 );
+            pOffender->emit( aCtx );
+            m_aErrorString = aCtx.getString();
+            parseError( m_aErrorString.getStr(), first );
+        }
+    }
+
+    void beginArray( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        PDFArray* pArray = new PDFArray();
+        pArray->m_nOffset = first - m_aGlobalBegin;
+
+        insertNewValue( std::unique_ptr<PDFEntry>(pArray), first );
+        // will not come here if insertion fails (exception)
+        m_aObjectStack.push_back( pArray );
+    }
+
+    void endArray( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        if( m_aObjectStack.empty() )
+            parseError( "array end without begin", first );
+        else if( dynamic_cast<PDFArray*>(m_aObjectStack.back()) == nullptr )
+            parseError( "spurious array end", first );
+        else
+            m_aObjectStack.pop_back();
+    }
+
+    void emitStream( iteratorT first, iteratorT last )
+    {
+        if( m_aObjectStack.empty() )
+            parseError( "stream without object", first );
+        PDFObject* pObj = dynamic_cast<PDFObject*>(m_aObjectStack.back());
+        if( pObj && pObj->m_pObject )
+        {
+            if( pObj->m_pStream )
+                parseError( "multiple streams in object", first );
+
+            PDFDict* pDict = dynamic_cast<PDFDict*>(pObj->m_pObject);
+            if( pDict )
+            {
+                PDFStream* pStream = new PDFStream( first - m_aGlobalBegin, last - m_aGlobalBegin, pDict );
+
+                pObj->m_pStream = pStream;
+                pObj->m_aSubElements.emplace_back( pStream );
+            }
+        }
+        else
+            parseError( "stream without object", first );
+    }
+
+    void beginTrailer( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        if( m_aObjectStack.empty() )
+            m_aObjectStack.push_back( new PDFPart() );
+
+        PDFTrailer* pTrailer = new PDFTrailer();
+        pTrailer->m_nOffset = first - m_aGlobalBegin;
+
+        PDFContainer* pContainer = dynamic_cast<PDFContainer*>(m_aObjectStack.back());
+        if( pContainer &&
+            ( dynamic_cast<PDFFile*>(pContainer) ||
+              dynamic_cast<PDFPart*>(pContainer) ) )
+        {
+            pContainer->m_aSubElements.emplace_back( pTrailer );
+            m_aObjectStack.push_back( pTrailer );
+        }
+        else
+            parseError( "trailer in wrong place", first );
+    }
+
+    void endTrailer( iteratorT first, SAL_UNUSED_PARAMETER iteratorT )
+    {
+        if( m_aObjectStack.empty() )
+            parseError( "%%EOF without trailer", first );
+        else if( dynamic_cast<PDFTrailer*>(m_aObjectStack.back()) == nullptr )
+            parseError( "spurious %%EOF", first );
+        else
+            m_aObjectStack.pop_back();
+    }
+};
+
+}
+
+#ifdef _WIN32
+std::unique_ptr<PDFEntry> PDFReader::read( const char* pBuffer, unsigned int nLen )
+{
+    PDFGrammar<const char*> aGrammar( pBuffer );
+
+    try
+    {
+#if OSL_DEBUG_LEVEL > 0
+        boost::spirit::classic::parse_info<const char*> aInfo =
+#endif
+            boost::spirit::classic::parse( pBuffer,
+                                  pBuffer+nLen,
+                                  aGrammar,
+                                  boost::spirit::classic::space_p );
+#if OSL_DEBUG_LEVEL > 0
+        SAL_INFO("sdext.pdfimport.pdfparse", "parseinfo: stop = " << aInfo.stop << " (buff=" << pBuffer << ", offset = " << aInfo.stop - pBuffer << "), hit = " << (aInfo.hit ? OUString("true") : OUString("false")) << ", full = " << (aInfo.full ? OUString("true") : OUString("false")) << ", length = " << static_cast<int>(aInfo.length) );
+#endif
+    }
+    catch( const parser_error<const char*, const char*>& rError )
+    {
+#if OSL_DEBUG_LEVEL > 0
+        OString aTmp;
+        unsigned int nElem = aGrammar.m_aObjectStack.size();
+        for( unsigned int i = 0; i < nElem; i++ )
+            aTmp += OStringLiteral("   ") + typeid( *(aGrammar.m_aObjectStack[i]) ).name();
+
+        SAL_WARN("sdext.pdfimport.pdfparse", "parse error: " << rError.descriptor << " at buffer pos " << rError.where - pBuffer << ", object stack: " << aTmp);
+#else
+        (void)rError;
+#endif
+    }
+
+    std::unique_ptr<PDFEntry> pRet;
+    unsigned int nEntries = aGrammar.m_aObjectStack.size();
+    if( nEntries == 1 )
+    {
+        pRet.reset(aGrammar.m_aObjectStack.back());
+        aGrammar.m_aObjectStack.pop_back();
+    }
+#if OSL_DEBUG_LEVEL > 0
+    else if( nEntries > 1 )
+        SAL_WARN("sdext.pdfimport.pdfparse", "error got " << nEntries << " stack objects in parse" );
+#endif
+
+    return pRet;
+}
+#endif
+
+std::unique_ptr<PDFEntry> PDFReader::read( const char* pFileName )
+{
+#ifdef _WIN32
+    /* #i106583#
+       since converting to boost 1.39 file_iterator does not work anymore on all Windows systems
+       C++ stdlib istream_iterator does not allow "-" apparently
+       using spirit 2.0 doesn't work in our environment with the MSC
+
+       So for the time being bite the bullet and read the whole file.
+       FIXME: give Spirit 2.x another try when we upgrade boost again.
+    */
+    std::unique_ptr<PDFEntry> pRet;
+    FILE* fp = fopen( pFileName, "rb" );
+    if( fp )
+    {
+        fseek( fp, 0, SEEK_END );
+        unsigned int nLen = static_cast<unsigned int>(ftell( fp ));
+        fseek( fp, 0, SEEK_SET );
+        char* pBuf = static_cast<char*>(std::malloc( nLen ));
+        if( pBuf )
+        {
+            fread( pBuf, 1, nLen, fp );
+            pRet = read( pBuf, nLen );
+            std::free( pBuf );
+        }
+        fclose( fp );
+    }
+    return pRet;
+#else
+    file_iterator<> file_start( pFileName );
+    if( ! file_start )
+        return nullptr;
+    file_iterator<> file_end = file_start.make_end();
+    PDFGrammar< file_iterator<> > aGrammar( file_start );
+
+    try
+    {
+#if OSL_DEBUG_LEVEL > 0
+        boost::spirit::classic::parse_info< file_iterator<> > aInfo =
+#endif
+            boost::spirit::classic::parse( file_start,
+                                  file_end,
+                                  aGrammar,
+                                  boost::spirit::classic::space_p );
+#if OSL_DEBUG_LEVEL > 0
+        SAL_INFO("sdext.pdfimport.pdfparse", "parseinfo: stop at offset = " << aInfo.stop - file_start << ", hit = " << (aInfo.hit ? "true" : "false") << ", full = " << (aInfo.full ? "true" : "false") << ", length = " << aInfo.length);
+#endif
+    }
+    catch( const parser_error< const char*, file_iterator<> >& rError )
+    {
+        SAL_WARN("sdext.pdfimport.pdfparse", "parse error: " << rError.descriptor << " at buffer pos " << rError.where - file_start);
+#if OSL_DEBUG_LEVEL > 0
+        OUStringBuffer aTmp;
+        unsigned int nElem = aGrammar.m_aObjectStack.size();
+        for( unsigned int i = 0; i < nElem; i++ )
+        {
+            aTmp.append("   ");
+            aTmp.appendAscii(typeid( *(aGrammar.m_aObjectStack[i]) ).name());
+        }
+        SAL_WARN("sdext.pdfimport.pdfparse", "parse error object stack: " << aTmp.makeStringAndClear());
+#endif
+    }
+
+    std::unique_ptr<PDFEntry> pRet;
+    unsigned int nEntries = aGrammar.m_aObjectStack.size();
+    if( nEntries == 1 )
+    {
+        pRet.reset(aGrammar.m_aObjectStack.back());
+        aGrammar.m_aObjectStack.pop_back();
+    }
+#if OSL_DEBUG_LEVEL > 0
+    else if( nEntries > 1 )
+    {
+        SAL_WARN("sdext.pdfimport.pdfparse", "error got " << nEntries << " stack objects in parse");
+        for( unsigned int i = 0; i < nEntries; i++ )
+        {
+            SAL_WARN("sdext.pdfimport.pdfparse", typeid(*aGrammar.m_aObjectStack[i]).name());
+            PDFObject* pObj = dynamic_cast<PDFObject*>(aGrammar.m_aObjectStack[i]);
+            if( pObj )
+                SAL_WARN("sdext.pdfimport.pdfparse", "   -> object " << pObj->m_nNumber << " generation " << pObj->m_nGeneration);
+            else
+                SAL_WARN("sdext.pdfimport.pdfparse", "(type " << typeid(*aGrammar.m_aObjectStack[i]).name() << ")");
+        }
+    }
+#endif
+    return pRet;
+#endif // WIN32
+}
+
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */