[OpenJade-users] problem with cdata attributes

[Daniel S. <dan...@kg...>]

Moin,

I have to parse a SGML document using openSP. And I have little problems
with attributes.

When an attribute has the type cdata, the CharString data of the
Structure Attribute::CdataChunk is sometimes NULL, 0xBAADF00D or has
very strange values. What could cause this effect?

I am using:
 * Windows XP Pro
 * Microsoft Visual C++ .NET   7.0
 * opensp 1.5.2

I have Also tested it with Linux and got the same error:
 * Linux 2.6.12-gentoo-r10 i686 AMD Athlon(tm) XP 1700+ AuthenticAMD
GNU/Linux
 * gcc version 3.3.6 (Gentoo 3.3.6, ssp-3.3.6-1.0, pie-8.7.8)
 * app-text/openjade Latest version installed: 1.3.2-r1



the example files:


catalog:
 -- snip --
PUBLIC "-//DST//DTD Some//EN"  "some.dtd"
 -- snap --


some.dtd:
 -- snip --
<!ELEMENT SOME - - EMPTY>
<!ATTLIST SOME
  ATTRIBUTE CDATA   #IMPLIED
>
 -- snap --


some.sgml:
 -- snip --
<!DOCTYPE SOME PUBLIC "-//DST//DTD Some//EN"> <SOME ATTRIBUTE=3D"value">
 -- snap --




the source code looks like this:


parser.h:
 -- snip --
#ifndef SGML_PARSER_H_
#define SGML_PARSER_H_

#include "ParserEventGeneratorKit.h"

#include <string>

using namespace std;

class parser: public SGMLApplication {
private:
	string attributeChars(const SGMLApplication::CharString &str);
	virtual void startElement(const
SGMLApplication::StartElementEvent &event);

};

#endif /*SGML_PARSER_H_*/
 -- snap --


parser.cpp:
 -- snip --
#include <iostream>

#include <windows.h>

#include "parser.h"

using namespace std;

ostream &operator<<(ostream &os, SGMLApplication::CharString s)
{
	if(NULL =3D=3D s.ptr){
		os << "<!-- ptr=3DNULL -->";
	} else if(0xbaadf00d =3D=3D (int)s.ptr){
		os << "<!-- ptr=3D0xBAADF00D -->";
	} else if(0xbaadf00d =3D=3D (int)s.len){
		os << "<!-- len=3D0xBAADF00D -->";	=09
	} else {
		for (size_t i =3D 0; i < s.len; i++)
			os << char(s.ptr[i*4]);
	}
	return os;
}

bool operator=3D=3D(const SGMLApplication::CharString &str1,
		const SGMLApplication::CharString &str2)
{
  return (str1.len =3D=3D str2.len
	  && (str1.len =3D=3D 0
	      || memcmp(str1.ptr,
			str2.ptr,
			str1.len*sizeof(SGMLApplication::Char)) =3D=3D 0));
}



void parser::startElement(const StartElementEvent &event) {
	for (size_t i =3D 0; i < event.nAttributes; i++) {
		const Attribute &a =3D event.attributes[i];
	    switch (a.type) {
		  case Attribute::cdata:
			if (a.defaulted !=3D Attribute::definition) {
				cout << ' ' << a.name << '=3D' << '"';
				for (size_t j =3D 0; j < a.nCdataChunks;
j++)
				if (a.cdataChunks[j].isSdata)
					cout << "&" <<
a.cdataChunks[j].entityName << ";";
				else if (a.cdataChunks[j].isNonSgml)
					cout << "&#" <<
a.cdataChunks[j].nonSgmlChar << ";";
				else
				    cout << a.cdataChunks[j].data;
				cout << '"';
			}
			break;
		  case Attribute::tokenized:
			if (a.defaulted !=3D Attribute::definition) {
				if (a.isGroup && a.name =3D=3D a.tokens)
					cout << ' ' << a.tokens;
				else
					cout << ' ' << a.name << '=3D' <<
'"' << a.tokens << '"';
			}
			break;
		  default:
			break;
		}
	}


}
 -- snap --


main.cpp:
 -- snip --
#include "stdafx.h"

#include <iostream>

#include "ParserEventGeneratorKit.h"

#include "parser.h"

using namespace std;

int main(int argc, char* argv[])
{
	if(argc<2){
		cerr << "arguments: catalog input.sgml" << endl;
		return -1;
	}

	ParserEventGeneratorKit parserKit;
	parserKit.setOption(ParserEventGeneratorKit::showOpenEntities);
	parserKit.setOption(ParserEventGeneratorKit::showOpenElements);
=09
parserKit.setOption(ParserEventGeneratorKit::outputCommentDecls);
=09
parserKit.setOption(ParserEventGeneratorKit::outputMarkedSections);
=09
parserKit.setOption(ParserEventGeneratorKit::outputGeneralEntities);

	parserKit.setOption(ParserEventGeneratorKit::addCatalog,
argv[1]);
	parserKit.setOption(ParserEventGeneratorKit::enableWarning,
"all");

	char* files[] =3D {argv[2]};

	EventGenerator *egp =3D parserKit.makeEventGenerator(1, files);

	parser* par =3D new parser();	=09

	int nErrors =3D -1;
	try{
		nErrors =3D egp->run(*par);
	} catch (...) {
		cout << "EXCEPTION! ";
	}

	delete par;

	return nErrors;
}
 -- snap --


example output:
 -- snip --
 ATTRIBUTE=3D"<!-- ptr=3DNULL -->"
 -- snap --

or:
 -- snip --
 ATTRIBUTE=3D"<!-- ptr=3D0xBAADF00D -->
 -- snap --



If somebody has any tip I would be very pleased.

Thank You!


--=20
KGU-Consulting GmbH   Daniel Sturm
Software development  phone: +49 461 31852-14
Lise-Meitner-Str. 2   telefax: +49 461 31852-20
D 24941 Flensburg     web: http://www.kgu-consulting.de