Re: [xml] stopping parsing

[Malcolm Tredinnick <malcolm commsecure com au>]

On Fri, 2003-10-31 at 09:50, Graham Bennett wrote:
> Hi all,
>
> What's the best way of stopping the parser from the SAX interface?
>
> My situation is this:  I'm doing 'partial' parsing of a document which
> involves stopping when a certain element is reached and not doing any
> more processing.  My initial solution was to NULL out all of my
> callbacks in the SAX handler so that the parser runs through to the end
> without my code receiving any more events.  This seems to work, but it
> would be nice to be able to stop the parser in its tracks rather than
> letting it finish the document.
>
> I looked at xmlStopParser, but I will tend to call this when I hit a
> start element, and the parser will give me errors back saying that it
> hit the end of the data before seeing the end element.

Notwithstanding Daniel's offer to include some extract code in libxml to
help with this, my current solution to this problem is to set a variable
within my data structure to indicate "I am shutting down". I set this
just prior to calling xmlStopParser(). Then my error handler checks this
and if it is in "shutting down" mode, does not process/report the error.

I guess this may not be appropriate for you, depending on how your data
structures are arranged. My general method have something hanging onto
the _private element of the ParserCtxt that I can add a "shutting_down"
field to, so I can let libxml haul the data pointer around for me.

It's is a bit (very?) hacky, but it seems to do the trick.

Cheers,
Malcolm