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/******************************************************
*
* zexy - implementation file
*
* copyleft (c) IOhannes m zmölnig
*
* 1999:forum::für::umläute:2004
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2
*
******************************************************/
/* 3108:forum::für::umläute:2000 */
/* objects for manipulating packages*/
/*
repack : (re)pack floats/symbols/pointers to fixed-length packages
*/
#include "zexy.h"
#include <string.h>
#include <memory.h>
/* -------------------- repack ------------------------------ */
/*
(re)pack a sequence of (packages of) atoms into a package of given length
"bang" gives out the current package immediately
the second inlet lets you change the default package size
*/
static t_class *repack_class;
typedef struct _repack
{
t_object x_obj;
t_atom *buffer;
int bufsize;
int outputsize;
int current;
} t_repack;
static void repack_set(t_repack *x, t_float f)
{
/* set the new default size */
int n = f;
if (n > 0) {
/* flush all the newsized packages that are in the buffer */
t_atom *dumbuf = x->buffer;
int dumcur = x->current;
while (n <= dumcur) {
outlet_list(x->x_obj.ob_outlet, gensym("list"), n, dumbuf);
dumcur -= n;
dumbuf += n;
}
if (dumcur < 0) error("this should never happen :: dumcur = %d < 0", dumcur);
else {
memcpy(x->buffer, dumbuf, dumcur * sizeof(t_atom));
x->current = dumcur;
}
if (n > x->bufsize) {
dumbuf = (t_atom *)getbytes(n * sizeof(t_atom));
memcpy(dumbuf, x->buffer, x->current * sizeof(t_atom));
freebytes(x->buffer, x->bufsize * sizeof(t_atom));
x->buffer = dumbuf;
x->bufsize = n;
}
x->outputsize = n;
}
}
static void repack_bang(t_repack *x)
{
/* output the list as far as we are now */
outlet_list(x->x_obj.ob_outlet, gensym("list"), x->current, x->buffer);
x->current = 0;
}
static void repack_float(t_repack *x, t_float f)
{
/* add a float-atom to the list */
SETFLOAT(&x->buffer[x->current], f);
x->current++;
if (x->current >= x->outputsize) repack_bang(x);
}
static void repack_symbol(t_repack *x, t_symbol *s)
{
/* add a sym-atom to the list */
SETSYMBOL(&x->buffer[x->current], s);
x->current++;
if (x->current >= x->outputsize) repack_bang(x);
}
static void repack_pointer(t_repack *x, t_gpointer *p)
{
/* add a pointer-atom to the list */
SETPOINTER(&x->buffer[x->current], p);
x->current++;
if (x->current >= x->outputsize) repack_bang(x);
}
static void repack_list(t_repack *x, t_symbol *s, int argc, t_atom *argv)
{
int remain = x->outputsize - x->current;
t_atom *ap = argv;
ZEXY_USEVAR(s);
if (argc >= remain) {
memcpy(x->buffer+x->current, ap, remain * sizeof(t_atom));
ap += remain;
argc -= remain;
outlet_list(x->x_obj.ob_outlet, gensym("list"), x->outputsize, x->buffer);
x->current = 0;
}
while (argc >= x->outputsize) {
outlet_list(x->x_obj.ob_outlet, gensym("list"), x->outputsize, ap);
ap += x->outputsize;
argc -= x->outputsize;
}
memcpy(x->buffer + x->current, ap, argc * sizeof(t_atom));
x->current += argc;
}
static void repack_anything(t_repack *x, t_symbol *s, int argc, t_atom *argv)
{
SETSYMBOL(&x->buffer[x->current], s);
x->current++;
if (x->current >= x->outputsize) {
repack_bang(x);
}
repack_list(x, gensym("list"), argc, argv);
}
static void *repack_new(t_floatarg f)
{
t_repack *x = (t_repack *)pd_new(repack_class);
x->outputsize = x->bufsize = (f>0.f)?f:2 ;
x->current = 0;
x->buffer = (t_atom *)getbytes(x->bufsize * sizeof(t_atom));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym(""));
outlet_new(&x->x_obj, 0);
return (x);
}
void repack_setup(void)
{
repack_class = class_new(gensym("repack"), (t_newmethod)repack_new,
0, sizeof(t_repack), 0, A_DEFFLOAT, 0);
class_addbang (repack_class, repack_bang);
class_addfloat (repack_class, repack_float);
class_addsymbol (repack_class, repack_symbol);
class_addpointer (repack_class, repack_pointer);
class_addlist (repack_class, repack_list);
class_addanything(repack_class, repack_anything);
class_addmethod (repack_class, (t_method)repack_set, gensym(""), A_DEFFLOAT, 0);
zexy_register("repack");
}
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