Re: [xml] Re: maybe_offtopic: help with using exslt functions

[Stefan Kost <ensonic hora-obscura de>]

Hi Ralf,

R. Mattes wrote:
> On Thu, 22 Sep 2005 17:42:19 +0200, Stefan Kost wrote:
>
> > hi,
> >
> > I try to use some nonstandartized exslt functions (see
> > http://www.exslt.org/str/index.html -> str.zip)
> >
> > When running the attached samples I get
> > $ xsltproc devhelp.xsl devhelp.xml
> > xmlXPathCompOpEval: function split not found
> > XPath error : Unregistered function
> > xmlXPathCompiledEval: 1 object left on the stack
> > <?xml version="1.0"?>
> > <test xmlns="http://www.devhelp.net/book"/>
> >
> > when rerunning it with -v I et a long log (see attached xsltproc.log).
> > It seems to load the function definitions, 
>
>
>
> What makes you think so? From the log you posted:
> | Registering extension prefix str : http://exslt.org/Strings
> | LIBXSLT_PLUGINS_PATH is (null)
> | Attempting to load plugin:
> | /home/ensonic/lib/libxslt/1.1/exslt_org_Strings.so for
> | URIhttp://exslt.org/Strin
> | xmlCheckFilename failed for plugin:
> | /home/ensonic/lib/libxslt/1.1/exs_org_Strings.so
> | xsltPrecomputeStylesheet: removing ignorable blank node ltgs: 
>
>
> Doesn't look like a successful load to me. Does the library exist
> at 'home/ensonic/lib/libxslt/1.1/exs_org_Strings.so'?

I belive libxslt tried to see if the function lives in a shared library and 
tries. But the extension function is completle implemented in the loaded xsl 
files. This makes me feel that there is possibly a bug. Because the message:
  'xmlXPathCompOpEval: function split not found'
look like the error is cvaught too late. If there is a problem with the xsl 
implementation, the error needs to be emitted there.
> > but then seems to have
> > difficultied to call them from the xsl file. It looks like its trying to
> > load them from shared-object a multiple times.
> > Any insights whats going on here?
>
>
> Dynamic loading attempts to load the library every time it the function
> gets called. And fails ...
>
Which is bad. The library won't grow there by a miracle.

Ciao
  Stefan