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/*
Copyright (C) 2002 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
*/
#include <m_pd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#define IS_A_FLOAT(atom,index) ((atom+index)->a_type == A_FLOAT)
#define IS_A_SYMBOL(atom,index) ((atom+index)->a_type == A_SYMBOL)
static t_class *f2s_class;
typedef struct _f2s
{
t_object x_ob;
t_float x_f;
int x_type; /*0: p/n//m/./k/M/G with n digits */
int x_n;
} t_f2s;
static void f2s_bang(t_f2s *x)
{
char buf[256],delim;
float f=x->x_f,fnorm;
int ilogf,ilogf3,fh,fl=0,subdigits;
if(!f) {
sprintf(buf,"0");
goto end;
}
ilogf=(int)floor(log10(fabs(f)));
ilogf3=(int)floor(log10(fabs(f))/3);
subdigits=2-ilogf+ilogf3*3;
fnorm=f*pow(10,-ilogf3*3);
fh=(int)(fnorm);
fl=(int)(fabs((fnorm-fh)*pow(10,subdigits))+0.00001);
switch(ilogf3){
case -4: delim='p'; break;
case -3: delim='n'; break;
case -2: delim='u'; break;
case -1: delim='m'; break;
case 0: delim=subdigits?'.':0; break;
case 1: delim='k'; break;
case 2: delim='M'; break;
case 3: delim='G'; break;
case 4: delim='T'; break;
default:delim='?';
}
if(subdigits)
sprintf(buf,"%i%c%0*i",fh,delim,subdigits,fl);
else {
if(delim=='m')
sprintf(buf,"%s%03i",fh<0?"-.":".",abs(fh));
else sprintf(buf,"%i%c",fh,delim);
}
end:
outlet_symbol(((t_object *)x)->ob_outlet,gensym(buf));
}
static void f2s_float(t_f2s *x,t_float val)
{
x->x_f=val;
f2s_bang(x);
}
static void *f2s_new( t_symbol *s, int argc, t_atom *argv)
{
t_atom *at;
t_f2s *x=(t_f2s*)pd_new(f2s_class);
x->x_f=0;
x->x_type=0;
x->x_n=3;
outlet_new(&x->x_ob, &s_symbol);
if(argc&&IS_A_FLOAT(argv,0)) {
x->x_n=atom_getfloat(argv++);
argc--;
}
return (void *)x;
}
void f2s_setup(void)
{
f2s_class = class_new(gensym("f2s"),(t_newmethod)f2s_new,
0, sizeof(t_f2s),0,A_GIMME ,0);
class_addfloat(f2s_class, (t_method)f2s_float);
class_addbang(f2s_class, (t_method)f2s_bang);
class_sethelpsymbol(f2s_class, gensym("moonlibs/f2s"));
}
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