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/******************************************************
*
* try - implementation file
*
* copyleft (c) IOhannes m zmölnig
*
* 2007:forum::für::umläute:2007
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2 (or later)
*
******************************************************/
/*
* this object provides a way to create an object with a fallback
* [try bla 13, blu 134] will first try to create an obect [bla 13] and if this fails use [blu 134] instead.
*
* currently this only works for objectclasses (no abstractions)
* currently this doesn't work (well) with [list]
*/
#include "m_pd.h"
#include "g_canvas.h"
int glist_getindex(t_glist *x, t_gobj *y);
/* ------------------------- try ---------------------------- */
static t_class *try_class;
typedef struct _try
{
t_object x_obj;
} t_try;
typedef t_pd *(*t_newgimme)(t_symbol *s, int argc, t_atom *argv);
t_pd*try_this(int argc, t_atom*argv) {
t_symbol*s=NULL;
if(!argc)return NULL;
s=atom_getsymbol(argv);
if(A_SYMBOL==argv->a_type) {
argc--;
argv++;
}
//startpost("[%s] (%x): ", s->s_name, s); postatom(argc, argv); endpost();
t_newgimme fun=(t_newgimme)zgetfn(&pd_objectmaker, s);
if(fun) {
//post("found a creator for [%s]", s->s_name);
return fun(s, argc, argv);
}
return NULL;
}
static void *try_new(t_symbol*s, int argc, t_atom*argv)
{
t_pd*x=NULL;
int start=0, i=0;
if(!pd_objectmaker) {
error("[try] could not find pd_objectmaker");
return NULL;
}
for(i=0; i<argc; i++) {
if(atom_getsymbolarg(i,argc, argv)==gensym(",")) {
x=try_this(i-start, argv+start);
if(x)return x;
start=i+1;
}
}
x=try_this(argc-start, argv+start);
return (x);
}
void try_setup(void)
{
try_class = class_new(gensym("try"),
(t_newmethod)try_new, NULL,
sizeof(t_try), 0,
A_GIMME, 0);
}
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