Hi, first a question: how do I detect which version of Xerces C is installed? My current interface to Xerces 2.7.0 uses DOMBuilder, which is deprecated in 3.0. I already switched to DOMLSParser and it works fine -- but the resulting source code is incompatible with 2.7.0. Is there a clean way to detect the version? (other than looking for the DOMLSParser/DOMBuilder classes).
I noticed some strange behaviour in Xerces 3.0 when using XInclude: I've written a small test app which parses a file containing the following XInclude spec and serializes the result: <xi:include href="willi.xml" xmlns:xi="http://www.w3.org/2001/XInclude";> <xi:fallback xmlns:xi="http://www.w3.org/2001/XInclude";> <class id="i1"> <member nodes="p18 p29" scc="s7"/> <member nodes="p22 p31" scc="s11"/> </class> </xi:fallback> </xi:include> Parsing of the file seems to work fine. In case the file "willi.xml" exists it is included and the result is properly serialized. However, I get an infinite loop during serialization (which eats up memory) if "willi.xml" does NOT exist. In case I remove the fallback element (including its childs) completely, serialization works as expected and the unevaluated xi::include-element can be found in the output. Here is a debugger session: (gdb) run test.xml Starting program: /home/weitzel/uni/FLUX/trunk/xml/support/.libs/lt-xmltest test.xml [Thread debugging using libthread_db enabled] [New Thread 1083798464 (LWP 28539)] Warning: XML parser: Element 'math' was referenced in a content model but never declared Warning: XML parser: Unable to include resource 'file:///home/weitzel/uni/FLUX/trunk/xml/support/willi.xml' ^C Program received signal SIGINT, Interrupt. [Switching to Thread 1083798464 (LWP 28539)] 0x4023f796 in xercesc_3_0::XMLFormatter::specialFormat (this=0x80cb048, toFormat=0xbf99d55c, count=1, escapeFlags=xercesc_3_0::XMLFormatter::NoEscapes) at xercesc/framework/XMLFormatter.cpp:635 635 , const EscapeFlags escapeFlags) Here's a backtrace of the endless loop: #0 0x4023f796 in xercesc_3_0::XMLFormatter::specialFormat (this=0x80cb048, toFormat=0xbf99d55c, count=1, escapeFlags=xercesc_3_0::XMLFormatter::NoEscapes) at xercesc/framework/XMLFormatter.cpp:635 srcPtr = <value optimized out> endPtr = (const XMLCh *) 0xbf99d55e #1 0x4023f547 in xercesc_3_0::XMLFormatter::formatBuf (this=0x80cb048, toFormat=0xbf99d55c, count=1, escapeFlags=xercesc_3_0::XMLFormatter::DefaultEscape, unrepFlags=xercesc_3_0::XMLFormatter::DefaultUnRep) at xercesc/framework/XMLFormatter.cpp:399 theChars = <value optimized out> actualEsc = xercesc_3_0::XMLFormatter::NoEscapes actualUnRep = xercesc_3_0::XMLFormatter::UnRep_CharRef srcPtr = <value optimized out> endPtr = <value optimized out> #2 0x4023f8e2 in xercesc_3_0::XMLFormatter::operator<< (this=0x80cb048, toFormat=32) at xercesc/framework/XMLFormatter.cpp:544 szTmp = {32, 0} #3 0x4021f259 in xercesc_3_0::DOMLSSerializerImpl::printIndent ( this=0x80d2848, level=4294967295) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:1626 i = 9237639 #4 0x4022090b in xercesc_3_0::DOMLSSerializerImpl::processNode ( this=0x80d2848, nodeToWrite=0x409c2cb0, level=2) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:787 filterAction = xercesc_3_0::DOMNodeFilter::FILTER_ACCEPT nodeLine = <value optimized out> namespaceMap = <value optimized out> child = <value optimized out> nodeName = (const XMLCh *) 0x80a4254 nodeValue = (const XMLCh *) 0x0 lent = 0 #5 0x4022095b in xercesc_3_0::DOMLSSerializerImpl::processNode ( this=0x80d2848, nodeToWrite=0x409c19e0, level=2) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:988 filterAction = xercesc_3_0::DOMNodeFilter::FILTER_ACCEPT nodeLine = 2 namespaceMap = (xercesc_3_0::RefHashTableOf<short unsigned int> *) 0x0 child = (DOMNodeSPtr) 0x409c2cb0 nodeName = (const XMLCh *) 0x409c1a24 nodeValue = <value optimized out> lent = <value optimized out> #6 0x4022095b in xercesc_3_0::DOMLSSerializerImpl::processNode ( this=0x80d2848, nodeToWrite=0x80a4330, level=1) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:988 filterAction = xercesc_3_0::DOMNodeFilter::FILTER_ACCEPT nodeLine = 2 namespaceMap = (xercesc_3_0::RefHashTableOf<short unsigned int> *) 0x0 child = (DOMNodeSPtr) 0x409c19e0 nodeName = (const XMLCh *) 0x80a31dc nodeValue = <value optimized out> lent = <value optimized out> #7 0x40220f56 in xercesc_3_0::DOMLSSerializerImpl::processNode ( this=0x80d2848, nodeToWrite=0x80a2a80, level=0) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:746 docu = (const xercesc_3_0::DOMDocument *) 0x80a2a74 child = (DOMNodeSPtr) 0x80a4330 nodeName = (const XMLCh *) 0x40373916 nodeValue = (const XMLCh *) 0x80a2a74 lent = <value optimized out> #8 0x4022241a in xercesc_3_0::DOMLSSerializerImpl::processNode ( this=0x80d2848, nodeToWrite=0x80a2a80) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:1594 No locals. #9 0x4022258f in xercesc_3_0::DOMLSSerializerImpl::write (this=0x80d2848, nodeToWrite=0x80a2a80, destination=0x80ca298) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:512 janName = {<xercesc_3_0::XMemory> = {<No data fields>}, fData = 0x80cb048} pTarget = (class xercesc_3_0::XMLFormatTarget *) 0x80d1fc0 janTarget = {<xercesc_3_0::XMemory> = {<No data fields>}, fData = 0x0} docu = <value optimized out> lsEncoding = <value optimized out> #10 0x40024d04 in xml::DOMWriterImplL3::writeToStream (this=0x80a9de0, out_file=0x406ae3a0) at DOMWriterImplL3.cc:128 theSerializer = (xercesc_3_0::DOMLSSerializer *) 0x80d2848 theOutput = (class xercesc_3_0::DOMLSOutput *) 0x80ca298 gSplitCdataSections = false gDiscardDefaultContent = true gFormatPrettyPrint = true gWriteBOM = false config = (class xercesc_3_0::DOMConfiguration *) 0x80d284c myFormatTarget = (class xercesc_3_0::XMLFormatTarget *) 0x80d1fc0 buffer = (const XMLByte *) 0x1 <Address 0x1 out of bounds> buffer_length = 1073831104 nblocks = 3214530561 e = (class xercesc_3_0::XMLException &) @0xbf99d848: {<xercesc_3_0::XMemory> = {<No data fields>}, _vptr.XMLException = 0xbf99d8a8, fCode = 134519955, fSrcFile = 0x80a9de0 "ΒΈΒΊ\004\b\001", fSrcLine = 1080746912, fMsg = 0x80a2a74, fMemoryManager = 0x40024471} #11 0x08049c93 in main (argc=2, argv=0xbf99d934) at XMLTest.cc:36 doc = (class xercesc_3_0::DOMDocument *) 0x80a2a74 dr = (xml::DOMReader *) 0x8095078 dw = (xml::DOMWriter *) 0x80a9de0 the endless loop is located in xercesc_3_0::DOMLSSerializerImpl::printIndent (this=0x80d2848, level=4294967295) at xercesc/dom/impl/DOMLSSerializerImpl.cpp:1625 1625 for(unsigned int i = 0; i < level; i++) (gdb) print level $1 = 4294967295 (gdb) print i $2 = 9237639 Thank you! :-) -- Cheers, Michael
