[PD-dev] getting the classname in an class

Hans-Christoph Steiner hans at eds.org
Mon Oct 29 03:57:52 CET 2007


It sounds like this isn't the way to do it then.  But somewhere the  
whole classname with the namespace prefix must be stored for every  
single object instantiated, since it will get written out to the  
file.  How do I access that?

.hc

On Oct 28, 2007, at 10:50 PM, Miller Puckette wrote:

> I think the binbuf is always present, but in the case of a top-level
> canvas, it might be empty; binbuf_getnatom() tells you how many atoms
> there are.
>
> cheers
> Miller
>
> On Sun, Oct 28, 2007 at 10:14:48PM -0400, Hans-Christoph Steiner  
> wrote:
>>
>> On Oct 28, 2007, at 8:47 PM, Martin Peach wrote:
>>
>>> Hans-Christoph Steiner wrote:
>>>>
>>>> I tried this in entry_new() and entry_save(), and in both,
>>>> "binbuf"  ends being nothing useful (i.e. segfault):
>>>>
>>>>      t_glist *glist = (t_glist *) canvas_getcurrent();
>>>>      t_canvas *canvas = (t_canvas*) glist_getcanvas(glist);
>>>>      t_binbuf *binbuf = canvas->gl_obj.te_binbuf;
>>>>      t_atom *ap = binbuf_getvec(binbuf);
>>>>      t_symbol *classname = atom_getsymbol(ap);
>>>>
>>>> What's going on here?  Am I doing something wrong?
>>>>
>>> I don't know what you're trying to do but it's normal to check for
>>> NULL pointers after each of the above statements. That should give
>>> you a clue.
>>> I suspect that the binbuf doesn't exist if you didn't allocate it
>>> yourself.
>>
>> I am just following IOhannes' code, which he says works (I haven't
>> tested it...)
>>
>> http://pure-data.cvs.sourceforge.net/pure-data/externals/iem/iemguts/
>> src/saveargs.c?view=markup
>>
>> Somehow, he magically gets a binbuf with contents in it! ;)
>>
>> .hc
>>
>>
>> --------------------------------------------------------------------- 
>> ---
>> ----
>>
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>>
>>
>>
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