Re: [xml] Does libxml2 create nodes on-the-fly?

[Daniel Veillard <veillard redhat com>]

On Sat, Jun 24, 2006 at 12:26:47AM +0200, Andreas Pakulat wrote:
> On 23.06.06 17:05:08, Daniel Veillard wrote:
> > On Fri, Jun 23, 2006 at 10:07:20PM +0200, Andreas Pakulat wrote:
> > > Anybody with a hint, how to check wether 2 nodes are the same?
> >
> >   unfortunately I'm afraid you need to go down to the C level and
> > check the 2 pointers, they aren't seen at the python level. Should be
> > a fairly easy change to python/libxml.c to add this equality entry point
> > and then add a method in the node class in libxml.py to be used for
> > comparison.
>
> Ok, first I'll open a wishlist bug for this and then I'll try to do this

  that that's a good first step :-)

> (though I'm not familiar with libxml2's C Interface, nor the
> Python-C-Bridge-Stuff in general)...

  Should be fairly simple, make a C python binding routine based on
existing ones in python/libxml.c , give it a significant name,
change the beginning to expect 2 python obect references as arguments,
see type.h to see how the C object is attached, get the two xmlNodePtr
associated. Compare them, and return an python 0 or 1, then register
the new routine at the end of libxml.c
  now in libxml.py override the comparator operator to call that routine
in libxml2mod, add a python test case in test/ and bingo you're done :-)

Daniel

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