"Re: [xml] DTD - external subset - encoding"

[Kasimier Buchcik <kbuchcik 4commerce de>]

Hihi,

on 2/23/2004 8:08 PM Kasimier Buchcik wrote:

> Hi,
> 
> on 2/23/2004 1:44 PM Kasimier Buchcik wrote:
> 
> 
>>Hi,
>>
>>I have a XML document that references an external subset. Both are 
>>encoded in UTF-16. Xmllint seems to choke on the external subset file.
>>I haven't found anything about encoding problems with external subsets 
>>in the mail archives & bug list.
>>
>>
>>C:\dev\libxml2\lib\xml-2-6-6-xslt-1-1-2>xmllint parament_test.xml 
>>--valid --noent
>>parament_test.dtd:1: parser error : internal error
>> ?<
>>^
>>parament_test.dtd:1: parser error : DOCTYPE improperly terminated
>> ?<
>>^
>>parament_test.dtd:1: parser error : Input is not proper UTF-8, indicate 
>>encoding !
>> ?<
>>^
>>parament_test.dtd:1: error: Bytes: 0xFF 0xFE 0x3C 0x00
>> ?<
>>^
>>parament_test.dtd:1: parser error : Start tag expected, '<' not found
>> ?<
>>  ^
>>
>>C:\dev\libxml2\lib\xml-2-6-6-xslt-1-1-2>xmllint --version
>>xmllint: using libxml version 20606
>>    compiled with: DTDValid FTP HTTP HTML C14N Catalog XPath XPointer 
>>XInclude Iconv Unicode Regexps Automata Schemas
>>
>>I'm working on a w2k machine.
>>I have attached the test used.
> 
> 
> After some debugging I stranded in "xmlParserHandlePEReference" where a 
> switch of encoding could be done; but the test fails, since "entity-> 
> length" seems to be zero. I also have expected the "input" to be tested 
> for length >= 4 and not the "entity" - but this one is zero as well. 
> Since I don't know what length to use or how to fix this, I'm just able 
> to point this out:
> 
> 
> parser.c (xmlParserHandlePEReference)
> 
> /*
> 		     * Get the 4 first bytes and decode the charset
> 		     * if enc != XML_CHAR_ENCODING_NONE
> 		     * plug some encoding conversion routines.
> 		     */
> 		    GROW
> 	            if (entity->length >= 4) {   <<<----- HERE
> 			start[0] = RAW;
> 			start[1] = NXT(1);
> 			start[2] = NXT(2);
> 			start[3] = NXT(3);
> 			enc = xmlDetectCharEncoding(start, 4);
> 			if (enc != XML_CHAR_ENCODING_NONE) {
> 			    xmlSwitchEncoding(ctxt, enc);
> 			}
> 		    }
> 

Maby the line should read "if ((input->end - input->cur) >= 4)"?
Actually "input->length" seems not to be computed.

Greetings,

Kasimier