[PD] external: method to convert t_atom to c string.

Miller Puckette msp at ucsd.edu
Mon May 20 06:28:05 CEST 2013


Hi Jaime -

If you use A_GIMME the function prototype has to be as in:

void testtext_path(t_testtext *x, t_symbol *s, int argc, t_atom *argv).

cheers
Miller

On Sun, May 19, 2013 at 10:47:20PM -0500, J Oliver wrote:
> Hello all, 
> 
> I need to create a textfile from inside an external and I need to give the computer a path with a message like:
> 
> path /home/path/file.txt
> 
> I am therefore creating a method for path with:
> 
> 	class_addmethod(testtext_class, (t_method)testtext_path, gensym("path"), A_GIMME, 0); 
> 
> Or should I use A_DEFSYMBOL ? 
> 
> But then how can I read the atom inside the external?
> 
> I am using:
> 
> void testtext_path(t_testtext *x, t_atom *s){
> 	char teststring[1000];
> 	atom_string(s, teststring, 1000);
> 	post(teststring);
> }
> 
> but then I get the following printout:
> 
> consistency check failed: atom_string
> 333333@ÿÿÿÿs
> 
> I'm not sure where to move with this. anybody has any suggestions?
> 
> best,
> 
> J
> 
> Here's the info for atom_string:
> atom_string
> 
> void atom_string(t_atom *a, char *buf, unsigned int bufsize);
> Converts an atom a into a C-string buf. The memory to this char-Buffer has to be reserved manually and its length has to be declared in bufsize.
> 
> in: http://pdstatic.iem.at/externals-HOWTO/node9.html#SECTION00092200000000000000
> 
> 
> 
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> 
> 
> 

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