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/*
* iemmatrix
*
* objects for manipulating simple matrices
* mostly refering to matlab/octave matrix functions
*
* Copyright (c) 2005, Franz Zotter
* Copyright (c) 2006, IOhannes m zmölnig
* IEM, Graz, Austria
*
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
*
*/
#include "iemmatrix.h"
static t_class *mtx_reverse_class;
typedef struct _MTXreverse_ MTXreverse;
struct _MTXreverse_
{
t_object x_obj;
int size;
int reverse_mode; /* 0=col; 1=row */
t_outlet *list_outlet;
t_atom *list_out;
t_atom *list_in;
};
static void deleteMTXreverse (MTXreverse *mtx_reverse_obj)
{
if (mtx_reverse_obj->list_out)
freebytes (mtx_reverse_obj->list_out, sizeof(t_atom)*(mtx_reverse_obj->size+2));
}
static void mTXSetReverseMode (MTXreverse *mtx_reverse_obj, t_symbol *c_mode)
{
char c=*c_mode->s_name;
switch(c){
case 'c': case 'C': case ':': /* "column" */
mtx_reverse_obj->reverse_mode = 1;
break;
case 'r': case 'R': /* "row" */
mtx_reverse_obj->reverse_mode = 0;
break;
case 'e': case 'E': case '.': /* "element" just revert the whole matrix as if it was a list */
mtx_reverse_obj->reverse_mode = -1;
break;
default:
error("mtx_reverse: invalid mode '%s'", c_mode->s_name);
break;
}
}
static void *newMTXreverse (t_symbol *s, int argc, t_atom *argv)
{
MTXreverse *mtx_reverse_obj = (MTXreverse *) pd_new (mtx_reverse_class);
if(argc&&(A_SYMBOL==argv->a_type))
mTXSetReverseMode (mtx_reverse_obj, atom_getsymbol (argv));
else
mTXSetReverseMode (mtx_reverse_obj, gensym(":"));
mtx_reverse_obj->list_outlet = outlet_new (&mtx_reverse_obj->x_obj, gensym("matrix"));
return ((void *) mtx_reverse_obj);
}
static void mTXreverseBang (MTXreverse *mtx_reverse_obj)
{
if (mtx_reverse_obj->list_out)
outlet_anything(mtx_reverse_obj->list_outlet, gensym("matrix"),
mtx_reverse_obj->size+2, mtx_reverse_obj->list_out);
}
static void copyList (int n, t_atom *x, t_atom *y)
{
for (;n--;)
*y++ = *x++;
}
static void reverseList (int n, t_atom *y)
{
t_atom *read = y+n-1;
t_atom tmp;
n >>= 1;
while(n-->0) {
tmp = *y;
*y++ = *read;
*read-- = tmp;
}
}
static void reverseListStep (int n, int step, t_atom *y)
{
t_atom *read = y;
t_atom tmp;
n /= step;
y += (n-1) * step;
n >>= 1;
for (;n--; y-=step, read+=step) {
tmp = *y;
*y = *read;
*read = tmp;
}
}
static void mTXreverseMatrix (MTXreverse *mtx_reverse_obj, t_symbol *s,
int argc, t_atom *argv)
{
int rows = atom_getint (argv++);
int columns = atom_getint (argv++);
int size = rows * columns;
int list_size = argc - 2;
t_atom *list_out = mtx_reverse_obj->list_out;
int count;
/* size check */
if (!size) {
error("mtx_reverse: invalid dimensions");
return;
}
else if (list_size<size) {
error("mtx_reverse: sparse matrix not yet supported: use \"mtx_check\"");
return;
}
if (size != mtx_reverse_obj->size) {
if (!list_out)
list_out = (t_atom *) getbytes (sizeof (t_atom) * (size + 2));
else
list_out = (t_atom *) resizebytes (list_out,
sizeof (t_atom) * (mtx_reverse_obj->size+2),
sizeof (t_atom) * (size + 2));
}
mtx_reverse_obj->size = size;
mtx_reverse_obj->list_out = list_out;
/* main part */
list_out += 2;
copyList (size, argv, list_out);
switch(mtx_reverse_obj->reverse_mode) {
case 0:
for (count = columns; count--; list_out++)
reverseListStep (size, columns, list_out);
break;
case 1:
for (count = rows; count--; list_out += columns)
reverseList (columns, list_out);
break;
default:
reverseList (size, list_out);
}
list_out = mtx_reverse_obj->list_out;
SETSYMBOL(list_out, gensym("matrix"));
SETFLOAT(list_out, rows);
SETFLOAT(&list_out[1], columns);
outlet_anything(mtx_reverse_obj->list_outlet, gensym("matrix"),
mtx_reverse_obj->size+2, list_out);
}
void mtx_reverse_setup (void)
{
mtx_reverse_class = class_new
(gensym("mtx_reverse"),
(t_newmethod) newMTXreverse,
(t_method) deleteMTXreverse,
sizeof (MTXreverse),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_reverse_class, (t_method) mTXreverseBang);
class_addmethod (mtx_reverse_class, (t_method) mTXreverseMatrix, gensym("matrix"), A_GIMME,0);
class_addmethod (mtx_reverse_class, (t_method) mTXSetReverseMode, gensym("mode"), A_DEFSYMBOL,0);
}
void iemtx_reverse_setup(void){
mtx_reverse_setup();
}
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