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/* root-integer of a value
* Copyright (c) 2005-2023 Edward Kelly
* Forinformaion on usage and distribution, and for a DICLAIMER OF ALL
* WARRANTIES, see the file "LICENSE.txt," in this distribution. */
#include "m_pd.h"
t_class *rootint_class;
typedef struct _rootint
{
t_object x_obj;
int isInt, iDiv;
t_float lastDiv, thisDiv;
t_outlet *rootInteger;//, *pot;
} t_rootint;
void rootint_float(t_rootint *y, t_floatarg f)
{
if(f != 0 && f > 1 && (t_float)((int)f) == f)
{
y->thisDiv = y->lastDiv = f;
y->iDiv = (int)y->thisDiv;
while((t_float)y->iDiv == y->thisDiv)
{
y->lastDiv = y->thisDiv;
y->thisDiv *= 0.5;
y->iDiv = (int)y->thisDiv;
}
//if(y->lastDiv == 1) y->lastDiv = 2; //musically sensible but mathematically erroneous
//if(y->lastDiv == 1) outlet_bang(y->pot); //again, if the output is 1 we know it's a power-of-two, so another outlet is irrelevant!
outlet_float(y->rootInteger, y->lastDiv);
}
else post("input must be an integer greater than 1!");
}
void rootint_bang(t_rootint *y)
{
outlet_float(y->rootInteger, y->lastDiv);
}
void *rootint_new()
{
t_rootint *y = (t_rootint *)pd_new(rootint_class);
y->thisDiv = y->lastDiv = 2;
y->rootInteger = outlet_new(&y->x_obj, gensym("float"));
//y->pot = outlet_new(&y->x_obj, gensym("bang"));
return(void *)y;
}
void rootint_setup(void)
{
rootint_class = class_new(gensym("rootint"),
(t_newmethod)rootint_new,
0, sizeof(t_rootint),
0, A_DEFFLOAT, 0);
post("rootint - is it a power of two?");
class_addbang(rootint_class, rootint_bang);
class_addfloat(rootint_class, rootint_float);
}
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