Re: [xml] Possible "buggette"

[Daniel Veillard <veillard redhat com>]

On Tue, May 08, 2001 at 10:49:48AM +0200, Peter Jacobi wrote:
> Hi Daniel; All,
>
> I may be wrong here, due to my lack of understanding of 
> libxml internals, but isn't this related to some problems with 
> the ctxt pointer in SAX parsing, which were discussed short 
> time ago?

  Well ... maybe yes. But I don't remember this discussion.

> Is this a common symptem of the ctxt pointer serving double duty:
> - used internally by libxml
> - used for user provided callbacks

  The problem is that the callbacks may need access to the internal
informations (what entity is being parsed, what's the node name ...).

> Can there be a general solution by splitting this functionality into two ctxt 
> pointer? To make this minimally painfull, I assume ctxt should always 
> point to a "system context" (or derived structs) and the "system context" 
> holds the pointer to the "user context".

  The problem is that at this point the parser context is a public
structure (one could consider this bad design, but making it opaque
makes some specific handling nearly impossible). Changing this and doing
this split is a huge change which would lead to an API and ABI incompatible
version. So I'm not fond of it even if in principle it may be a good idea.

Daniel

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