Re: Question about the IDL ...

[Carlos Perello Marin <carlos hispalinux es>]

> > Hello!!
> > 
> > I have one question. When i have this method at the IDL:
> > 
> >     any  readChunk (in long start, in long size)
> > 
> > How i must map it into C? As i have been reading it should be various
> > methods at the server part to represent gboolean, gint, gfloat, etc...
> > Then, at the client side... What i must do? One method which specifies
> > the type of the data we must receive and then call the correct method?
> > 
> you must map this method into a function of the form:
> 
> gpointer readChunk (Gda_ReportStream *stream, long start, long size);
> 
> what must be done is to map the CORBA_any to a gpointer. If you see at
> /usr/include/orb/corba_any_type, you'll see that a CORBA_any is a pointer
> to a structure (CORBA_any_type) which contains:
> 
> struct CORBA_any_type {
>         CORBA_TypeCode _type;
>         gpointer _value;
>         CORBA_boolean _release;
> };
> 
> So the thing to do here is to just make a copy of the _value field, since we
> don't care about the type being returned: it's always binary data. And wait,
> this makes me think that it would be better to return a sequence of bytes,
> which makes more sense.
> 
> Let me change this... done. The idl is now:
> 
>         typedef sequence<octet> ReportStreamChunk;
>         interface ReportStream {
>                 readonly attribute any contents;
> 
>                 ReportStreamChunk readChunk (in long start, in long size);
>                 long writeChunk (in ReportStreamChunk data, in long size);
>         };
> 
> cheers

Ok, thanks.
> 
> 
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-- 
Carlos Perelló Marín
carlos hispalinux es
http://TorresQuevedo.hispalinux.es
http://nulies.hispalinux.es
http://www.Hispalinux.es
Valencia - España


Y tu, ya has Evolucionado?, pásate a Evolution :-)