Re: [xml] Validating In Memory (How to get a ValidCtxtPointer?)

[Daniel Veillard <veillard redhat com>]

On Thu, Feb 14, 2002 at 04:52:21PM +0700, Craig W. Wright wrote:
> Hello,
>
> I've searched up and down for a answer to this question and have come to
> nothing so here it goes :)
>
> I have the following C++ code:
>
>
> Result XMLDocument::isValid(CmtString const& dtdFullPathName,
>                             bool& isValid)
> {
>   // get the dtd's name and parse the dtd.
>   xmlDtdPtr dtd = xmlParseDTD(NULL, BAD_CAST dtdFullPathName.getData());
>
>    isValid = false;
>    if ( dtd == NULL)
>    {
>       return Result(CMT_FAILURE);
>    }
>
>    // build a xmlValidCtxt Ptr 
>  *************** This is the problem *****************
> // docPtr is an xmlDocumentPtr 
>
>    xmlValidCtxtPtr ctxt = xmlValidNewContext (data_->docPtr_);
> *********************************************
>
>    // check validity.
>    if ( xmlValidateDtd(ctxt,data_->docPtr_,dtd))
>    {
>       isValid = true;
>    }
>
>    xmlFreeDtd(dtd);
>
> *************** This is probably also a problem ***************
>    xmlValidFreeContext(ctxt);
> **********************************************************
>    return Result(CMT_SUCCESS);
>
> }
>
>
> The main problem here is that I don't know how to get a hold of a proper
> xmlValidContextPtr. I'm sure someone out there knows :) 

  the xmllint.c does this.

---------------
        dtd = xmlParseDTD(NULL, (const xmlChar *)dtdvalid);
        if (dtd == NULL) {
            xmlGenericError(xmlGenericErrorContext,
                    "Could not parse DTD %s\n", dtdvalid);
            progresult = 2;
        } else {
            xmlValidCtxt cvp;
            cvp.userData = (void *) stderr;
            cvp.error    = (xmlValidityErrorFunc) fprintf;
            cvp.warning  = (xmlValidityWarningFunc) fprintf;
            if (!xmlValidateDtd(&cvp, doc, dtd)) {
                xmlGenericError(xmlGenericErrorContext,
                        "Document %s does not validate against %s\n",
                        filename, dtdvalid);
            }
            xmlFreeDtd(dtd);
        }
---------------

  use the source !

Daniel

-- 
Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
veillard redhat com  | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
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