[xml] Unable to create huge text nodes with libxml2 2.7.7

["Michael Kwasigroch" <mkwasigr intercope com>]

Hi list,

I (actually a very important customer
;-) was bit by the 10MB size limit introduced in libxml2 2.7.3. Actually,
we are using 2.7.7...

The code basically does the following
(error handling omitted for clarity, actual code is more complex):

----- snip -----
xmlDocPtr        doc
   = NULL;
xmlNodePtr       node
  = NULL;
xmlTextWriterPtr writer = NULL;
char          
  huge[ 100*1024*1024 ] = { 'a' };
int          
   written;

doc = xmlNewDoc( (xmlChar *) "1.0"
);
node = xmlNewDocNode( doc, NULL, (xmlChar
*)"node", NULL );
xmlDocSetRootElement( doc, node );
writer = xmlNewTextWriterTree( doc,
node, 0 );
xmlTextWriterStartElement( writer,
BAD_CAST "huge" );
written = xmlTextWriterWriteBinHex(
writer, huge, 0, sizeof( huge ) );
----- snip -----

With libxml2 V2.7.7 xmlTextWriterWriteBinHex()
always returns -1 and error analysis reveals that the SAX2 parser hit the
10MB limit.

I was bypassing this by eliminating
the size limit check in SAX2.c and recompiling libxml2 but I do not really
like this "solution".

So the question is if there is a standard
way of passing the XML_PARSE_HUGE option to the SAX2 parser used under
the hood of the xmlTextWriter-family functions.

I have done extensive research but was
not able to find anything useful. I have checked but did not find a compile-time
option to eliminate the 10MB size limit.

Thanks and best regards,
Michael Kwasigroch________________________________________________________________
INTERCOPE International Communication Products Engineering GmbH
Himmelstrasse 12-16, 22299 Hamburg, Germany
Managing Directors: Reinhart Laumer, Frank Kollender
Commercial Registry: Amtsgericht Hamburg, HRB 31 638
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