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/*
Copyright (C) 2003 Antoine Rousseau
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* a shared symbol list, ala "value" .*/
#include <m_pd.h>
#include <stdlib.h>
#include <string.h>
static t_class *slist_class, *scommon_class;
typedef struct _sitem t_sitem;
struct _sitem
{
t_sitem *next;
t_symbol *s;
};
typedef struct scommon
{
t_pd c_pd;
t_symbol *c_sym;
int c_refcount;
t_sitem *first;
} t_scommon;
typedef struct _slist
{
t_object x_obj;
t_symbol *x_sym;
t_scommon *x_c;
t_outlet *x_symout;
t_outlet *x_lenout;
} t_slist;
static void sitem_delete(t_sitem **x)
{
t_sitem *next=(*x)->next;
//freebytes((*x)->name,strlen((*x)->name)+1);
freebytes(*x,sizeof(t_sitem));
(*x)=next;
}
static void sitem_add(t_sitem **x,t_symbol *s)
{
t_int l;
t_sitem *newone=getbytes(sizeof(t_sitem));
//newone->name=getbytes(l=(strlen(s->s_name)+1));
//strncpy(newone->name,s->s_name,l);
newone->s=s;
newone->next=0;
while(*x) x=&((*x)->next);
*x=newone;
}
static void *scommon_new(t_symbol *s)
{
t_scommon *x = (t_scommon *)pd_new(scommon_class);
x->c_refcount = 0;
x->c_sym=s;
pd_bind((t_pd *)x, s);
x->first=0;
return (x);
}
static int scommon_find(t_scommon *x, t_symbol *s)
{
t_sitem *si=x->first;
t_int i=1;
while(si)
{
if(!strcmp(si->s->s_name,s->s_name)) return i;
si=si->next;
i++;
}
return 0;
}
static void scommon_add(t_scommon *x, t_symbol *s)
{
sitem_add(&x->first,s);
}
static void scommon_reset(t_scommon *x)
{
while(x->first) sitem_delete(&x->first);
}
static void scommon_ff(t_scommon *x)
{
scommon_reset(x);
pd_unbind((t_pd *)x, x->c_sym);
}
/* get a pointer to a named symbol list (a "scommon" object),
which is created if necessary. */
t_scommon *slist_get(t_symbol *s)
{
t_scommon *c = (t_scommon *)pd_findbyclass(s, scommon_class);
if (!c) c = (t_scommon *)scommon_new(s);
c->c_refcount++;
return (c);
}
/* release a variable. This only frees the "scommon" resource when the
last interested party releases it. */
void slist_release(t_scommon *c)
{
if (!--c->c_refcount) scommon_ff(c);
}
static void *slist_new(t_symbol *s)
{
t_slist *x = (t_slist *)pd_new(slist_class);
x->x_sym = s;
x->x_c = slist_get(s);
outlet_new(&x->x_obj, &s_float);
x->x_symout=outlet_new(&x->x_obj, &s_symbol);
x->x_lenout=outlet_new(&x->x_obj, &s_float);
return (x);
}
static void slist_ff(t_slist *x)
{
slist_release(x->x_c);
}
static void slist_print(t_slist *x)
{
t_sitem *t=x->x_c->first;
int i=0;
while(t)
{
post("item %d: %s",++i,t->s->s_name);
t=t->next;
}
}
static void slist_reset(t_slist *x)
{
scommon_reset(x->x_c);
}
static void slist_add(t_slist *x,t_symbol *s)
{
scommon_add(x->x_c,s);
}
static void slist_find(t_slist *x,t_symbol *s)
{
outlet_float(x->x_obj.ob_outlet,scommon_find(x->x_c,s));
}
static void slist_setlist(t_slist *x,t_symbol *s)
{
slist_release(x->x_c);
x->x_c = slist_get(s);
}
static void slist_float(t_slist *x, t_float f)
{
t_sitem *t=x->x_c->first;
int i=0;
if(!f) return;
while(t&&((++i)!=f))
{
t=t->next;
}
if(t) outlet_symbol(x->x_symout,t->s);
}
static void slist_len(t_slist *x)
{
t_sitem *t=x->x_c->first;
int i=0;
while(t)
{
t=t->next;
i++;
}
outlet_float(x->x_lenout,i);
}
void slist_setup(void)
{
slist_class = class_new(gensym("slist"), (t_newmethod)slist_new,
(t_method)slist_ff,
sizeof(t_slist), 0, A_DEFSYM, 0);
//class_addbang(slist_class, slist_bang);
class_addfloat(slist_class, slist_float);
class_addmethod(slist_class,(t_method)slist_add, gensym("add"),A_SYMBOL,0);
class_addmethod(slist_class,(t_method)slist_find, gensym("find"),A_SYMBOL,0);
class_addmethod(slist_class,(t_method)slist_setlist, gensym("setlist"),A_SYMBOL,0);
class_addmethod(slist_class,(t_method)slist_reset, gensym("reset"),0);
class_addmethod(slist_class,(t_method)slist_print, gensym("print"),0);
class_addmethod(slist_class,(t_method)slist_len, gensym("len"),0);
scommon_class = class_new(gensym("slist"), 0, 0,
sizeof(t_scommon), CLASS_PD, 0);
}
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