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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include "common/loud.h"
#include "shared.h"
typedef struct _decide
{
t_object x_ob;
unsigned int x_seed;
} t_decide;
static t_class *decide_class;
/* the random bit algo is taken from NR (method II in 7.4) -- CHECKED */
#define RBIT1 1
#define RBIT2 2
#define RBIT5 16
#define RBIT18 131072
#define RBIT_MASK (RBIT1 + RBIT2 + RBIT5)
static void decide_bang(t_decide *x)
{
if (x->x_seed & RBIT18)
{
x->x_seed = ((x->x_seed ^ RBIT_MASK) << 1) | RBIT1;
outlet_float(((t_object *)x)->ob_outlet, 1);
}
else
{
x->x_seed <<= 1;
outlet_float(((t_object *)x)->ob_outlet, 0);
}
}
static void decide_float(t_decide *x, t_float f)
{
/* CHECKED: float loudly rejected, int (any value) same as bang */
int i;
if (loud_checkint((t_pd *)x, f, &i, &s_float))
decide_bang(x);
}
static void decide_ft1(t_decide *x, t_floatarg f)
{
int i = (int)f; /* CHECKED */
if (i) /* CHECKED: negative numbers are accepted */
x->x_seed = i;
else
x->x_seed = rand(); /* FIXED */
}
static void *decide_new(t_floatarg f)
{
t_decide *x = (t_decide *)pd_new(decide_class);
int i = (int)f;
if (i)
x->x_seed = i;
else
x->x_seed = rand();
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
outlet_new((t_object *)x, &s_float);
return (x);
}
void decide_setup(void)
{
decide_class = class_new(gensym("decide"),
(t_newmethod)decide_new, 0,
sizeof(t_decide), 0,
A_DEFFLOAT, 0);
class_addbang(decide_class, decide_bang);
class_addfloat(decide_class, decide_float);
class_addmethod(decide_class, (t_method)decide_ft1,
gensym("ft1"), A_FLOAT, 0);
/* CHECKED list is auto-unfolded */
/* CHECKED doesn't understand "seed" */
logpost(NULL, 4, "this is cyclone/decide %s, %dth %s build",
CYCLONE_VERSION, CYCLONE_BUILD, CYCLONE_RELEASE);}
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