Re: [xml] How to add a DTD to a document

[Daniel Veillard <veillard redhat com>]

On Sun, Mar 09, 2014 at 02:46:35PM +0100, Nick Wellnhofer wrote:
> > On 3/9/2014 17:33, Nick Wellnhofer wrote:
> > > I can’t find out how to add a DTD (internal subset) to a document without poking into libxml2’s internal 
> > > data structures. The obvious approach is to add a xmlDtdPtr using
> > > xmlAddPrevSibling on the document root. But this will cause a memory leak because xmlFreeDoc won’t free 
> > > the DTD nodes. It only frees the DTDs pointed to by doc->intSubset and doc->extSubset. So do I have to 
> > > deal with these struct members manually or is there a better way?
> > xmlCreateIntSubset() ? But it looks like you'll need to manually free previous xmlDtd first.
>
> Suppose that I already have a xmlDtdPtr, for example from another document. This question came up when 
> trying to correctly implement the “replaceNode” method in the Perl bindings.

  I'm afraid you have to access the structure indeed (it's part of the
API/ABI)

Daniel

-- 
Daniel Veillard      | Open Source and Standards, Red Hat
veillard redhat com  | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | virtualization library  http://libvirt.org/