Re: [xml] Re: How to validate?

[Petr Novak <novak merlot ics muni cz>]

Hi all,
thanks for advise, it works. But I have any more the following question:
How can I return data from handler function?
I have something like this:

void validateHandler(void *pUserData, xmlErrorPtr pError){
        ...
        // Here I find non-valid element and I need to log it and distribute
        // some information about it to the funciton "validate"
}

bool validate(){
        ...
        xmlSetStructuredErrorFunc(Context, (*validateHandler));
        xmlValidateDocument(Context, Document);
        ...
        // Here I need know something like the type of the node which is
        // non-valid.
}

I can assign anything to pUserData, but I cannot obtain it back in the
"validate" function. I though that it will be written to validation context,
but that were not changed.
If I try to assign it to the pError->ctxt->userData, it crashes with
"Unprivileged Memory Access" message.

Can you advise me again?

Thank you very much

Petr Novak, Liberouter Project

On Tue, Nov 18, 2003 at 04:00:28PM +0100, Enno Rehling wrote:
> Petr Novak wrote:
>
> > Hallo,
> > I have some questions about validation document against DTD (or
> > Relax NG in the future):
> >
> > 1. Is any way how to detect where is non-valid element or
> > attribute in document? I have parsed XML document (using
> > xmlParseFile) and DTD in file and I need obtain something
> > like xmlNodePtr.
>
> I've just gone through the same question, and I found 
> xmlSetStructuredErrorFunc() - it lets you define a callback that gets a 
> structured error message during the xmlValidate() process, which among 
> other things, contains the node that causes the error. Documentation and 
> examples are sparse, but with a little bit of poking around, you might find 
> what you need.
>
> Don't define the other two warning/error functions, or the structured Error 
> won't be called.
>
> > 2. So I tried validate elements itself. But if I try to validate
> > some element using xmlValidateElement, it returns always errors
> > to standart error output that every element in document is not
> > defined. Why?
>
> Can't help you there, need help myself. I'm also looking for better 
> documentation around schemas/dtds/etc, or some good examples to learn from.
>
> Enno
> -- 
> <Gibs> When you kill 6 people in Unreal Tournament it is "MonsterKill", In 
> Quake3 it is "Excellent", in Counter-Strike it is "Kicked by console"



-- 

Petr Novak, Liberouter Project (www.liberouter.org)
E-mail: novak merlot ics muni cz