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/*
* iemmatrix
*
* objects for manipulating simple matrices
* mostly refering to matlab/octave matrix functions
*
* Copyright (c) 2005, Franz Zotter
* 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_find_class;
static t_symbol *row_sym;
static t_symbol *col_sym;
static t_symbol *col_sym2;
static t_symbol *mtx_sym;
static t_symbol *mtx_sym2;
typedef struct _MTXfind_ MTXfind;
struct _MTXfind_
{
t_object x_obj;
int size;
int outsize;
//int find_dimension;
t_symbol *find_mode;
int find_direction;
t_outlet *list_outlet;
t_atom *list_out;
t_atom *list_in;
};
static void deleteMTXFind (MTXfind *mtx_find_obj)
{
if (mtx_find_obj->list_out)
freebytes (mtx_find_obj->list_out, sizeof(t_atom)*(mtx_find_obj->size+2));
}
static void mTXSetFindDirection (MTXfind *mtx_find_obj, t_float c_dir)
{
int direction = (int) c_dir;
if ((direction != -1) && (direction != 1))
direction = 1;
mtx_find_obj->find_direction = direction;
}
/*
static void mTXSetFindDimension (MTXfind *mtx_find_obj, t_float c_dim)
{
int dimension = (int) c_dim;
dimension = (dimension > 0)?dimension:0;
dimension = (dimension < 3)?dimension:3;
mtx_find_obj->find_dimension = dimension;
}
*/
static void mTXSetFindMode (MTXfind *mtx_find_obj, t_symbol *c_dim)
{
mtx_find_obj->find_mode = c_dim;
}
static void *newMTXFind (t_symbol *s, int argc, t_atom *argv)
{
MTXfind *mtx_find_obj = (MTXfind *) pd_new (mtx_find_class);
// int c_dim = 0;
// int c_dir = 1;
mTXSetFindMode (mtx_find_obj, gensym(":"));
mTXSetFindDirection (mtx_find_obj, 1);
if (argc>=1) {
if (argv[0].a_type == A_SYMBOL) {
mTXSetFindMode (mtx_find_obj, atom_getsymbol (argv));
if (argc>=2)
if (argv[1].a_type != A_SYMBOL)
mTXSetFindDirection (mtx_find_obj, atom_getfloat (argv+1));
else
post("mtx_find: 2nd arg ignored. supposed to be float");
}
else {
mTXSetFindDirection (mtx_find_obj, atom_getfloat (argv));
if (argc>=2) {
if (argv[1].a_type == A_SYMBOL)
mTXSetFindMode (mtx_find_obj, atom_getsymbol (argv+1));
else
post("mtx_find: 2nd arg ignored. supposed to be symbolic, e.g. \"row\", \"col\", \":\", \"mtx\"");
}
}
}
/*
switch ((argc>2)?2:argc) {
case 2:
c_dir = atom_getint(argv+1);
case 1:
c_dim = atom_getint(argv);
}
mTXSetFindDimension (mtx_find_obj, (t_float) c_dim);
mTXSetFindDirection (mtx_find_obj, (t_float) c_dir);
*/
mtx_find_obj->list_outlet = outlet_new (&mtx_find_obj->x_obj, gensym("matrix"));
error("[mtx_find]: this object is likely to change! not really for use yet");
return ((void *) mtx_find_obj);
}
static void mTXFindBang (MTXfind *mtx_find_obj)
{
if (mtx_find_obj->list_out)
outlet_anything(mtx_find_obj->list_outlet, gensym("matrix"),
mtx_find_obj->outsize+2, mtx_find_obj->list_out);
}
/*
static void copyList (int size, t_atom *x, t_atom *y)
{
while(size--)
*y++=*x++;
}
*/
static int findPreviousNonZero (const int n, t_atom *x, int offset)
{
x+=offset;
for (; offset > n; offset--, x--)
if (atom_getfloat(x))
return offset;
return -1;
}
static int findPreviousNonZeroStep (const int step, t_atom *x, int offset)
{
x += offset;
for (; offset > 0; offset-=step, x-=step)
if (atom_getfloat(x))
return offset;
return -1;
}
static int findNextNonZero (const int n, t_atom *x, int offset)
{
x+=offset;
for (; offset < n; offset++, x++)
if (atom_getfloat(x))
return offset;
return -1;
}
static int findNextNonZeroStep (const int n, const int step, t_atom *x, int offset)
{
x += offset;
for (; offset < n; offset+=step, x+=step)
if (atom_getfloat(x))
return offset;
return -1;
}
static void findFirstNonZeroRow (const int rows, const int columns, t_atom *x, t_atom *y)
{
int offset;
int pos;
const int size = rows*columns;
for (offset = 0; offset < size; y++, offset+=columns) {
pos = findNextNonZero(offset+columns,x,offset)+1;
SETFLOAT(y,(t_float)pos);
}
}
static void findLastNonZeroRow (const int rows, const int columns, t_atom *x, t_atom *y)
{
int offset;
int pos;
const int size = rows*columns;
for (offset = columns-1; offset < size; y++, offset+=columns) {
pos = findPreviousNonZero(offset-columns,x,offset)+1;
SETFLOAT(y,(t_float)pos);
}
}
static void findFirstNonZeroColumn (const int rows, const int columns, t_atom *x, t_atom *y)
{
int offset;
int pos;
const int size = rows*columns;
for (offset = 0; offset < columns; y++, offset++) {
pos = findNextNonZeroStep(size,columns,x,offset)+1;
SETFLOAT(y,(t_float)pos);
}
}
static void findLastNonZeroColumn (const int rows, const int columns, t_atom *x, t_atom *y)
{
int offset;
int pos;
const int size = rows*columns;
for (offset = size-columns; offset < size; y++, offset++) {
pos = findPreviousNonZeroStep(columns,x,offset)+1;
SETFLOAT(y,(t_float)pos);
}
}
static int findAllNonZeros (int n, t_atom *x, t_atom *y)
{
int outsize = 0;
int pos = 0;
while ((pos = findNextNonZero(n,x,pos)) != -1) {
pos++;
SETFLOAT(y,(t_float)pos);
y++;
outsize++;
}
return outsize;
}
static void zeroFloatList (int n, t_atom *x)
{
for (;n--;x++)
SETFLOAT(x,0);
}
static void findReplaceNonZerosWithIndex (int n, t_atom *x, t_atom *y)
{
int pos = 0;
zeroFloatList(n,y);
while ((pos = findNextNonZero(n,x,pos)) != -1) {
SETFLOAT(y+pos,(t_float)pos+1);
pos++;
}
}
static void mTXFindMatrix (MTXfind *mtx_find_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_in = argv;
t_atom *list_out = mtx_find_obj->list_out;
int count;
int rows_out;
int columns_out;
// size check
if (!size) {
post("mtx_find: invalid dimensions");
return;
}
else if (list_size<size) {
post("mtx_find: sparse matrix not yet supported: use \"mtx_check\"");
return;
}
if (size != mtx_find_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_find_obj->size+2),
sizeof (t_atom) * (size + 2));
}
mtx_find_obj->size = size;
mtx_find_obj->list_out = list_out;
// main part
list_out += 2;
//copyList (size, argv, list_out);
rows_out = 1;
if (mtx_find_obj->find_mode == row_sym) {
if (mtx_find_obj->find_direction == -1)
findLastNonZeroRow (rows, columns, list_in, list_out);
else
findFirstNonZeroRow (rows, columns, list_in, list_out);
rows_out = rows;
columns_out = 1;
}
else if ((mtx_find_obj->find_mode == col_sym)||
(mtx_find_obj->find_mode == col_sym2)) {
if (mtx_find_obj->find_direction == -1)
findLastNonZeroColumn (rows, columns, list_in, list_out);
else
findFirstNonZeroColumn (rows, columns, list_in, list_out);
columns_out = columns;
rows_out = 1;
}
else if ((mtx_find_obj->find_mode == mtx_sym)||
(mtx_find_obj->find_mode == mtx_sym2)) {
findReplaceNonZerosWithIndex (size, list_in, list_out);
rows_out = rows;
columns_out = columns;
}
else {
columns_out = findAllNonZeros (size, list_in, list_out);
rows_out = 1;
}
/*
switch (mtx_find_obj->find_dimension) {
case 0:
columns_out = findAllNonZeros (size, list_in, list_out);
rows_out = 1;
break;
case 3:
findReplaceNonZerosWithIndex (size, list_in, list_out);
rows_out = rows;
columns_out = columns;
break;
case 2:
if (mtx_find_obj->find_direction == -1)
findLastNonZeroColumn (rows, columns, list_in, list_out);
else
findFirstNonZeroColumn (rows, columns, list_in, list_out);
columns_out = columns;
rows_out = 1;
break;
case 1:
if (mtx_find_obj->find_direction == -1)
findLastNonZeroRow (rows, columns, list_in, list_out);
else
findFirstNonZeroRow (rows, columns, list_in, list_out);
rows_out = rows;
columns_out = 1;
break;
}
*/
mtx_find_obj->outsize = columns_out * rows_out;
list_out = mtx_find_obj->list_out;
SETSYMBOL(list_out, gensym("matrix"));
SETFLOAT(list_out, rows_out);
SETFLOAT(&list_out[1], columns_out);
outlet_anything(mtx_find_obj->list_outlet, gensym("matrix"),
mtx_find_obj->outsize+2, list_out);
}
void mtx_find_setup (void)
{
mtx_find_class = class_new
(gensym("mtx_find"),
(t_newmethod) newMTXFind,
(t_method) deleteMTXFind,
sizeof (MTXfind),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_find_class, (t_method) mTXFindBang);
class_addmethod (mtx_find_class, (t_method) mTXFindMatrix, gensym("matrix"), A_GIMME,0);
// class_addmethod (mtx_find_class, (t_method) mTXSetFindDimension, gensym("dimension"), A_DEFFLOAT,0);
class_addmethod (mtx_find_class, (t_method) mTXSetFindMode, gensym("mode"), A_DEFSYMBOL,0);
class_addmethod (mtx_find_class, (t_method) mTXSetFindDirection, gensym("direction"), A_DEFFLOAT,0);
class_sethelpsymbol (mtx_find_class, gensym("iemmatrix/mtx_find"));
row_sym = gensym("row");
col_sym = gensym("col");
col_sym2 = gensym("columns");
mtx_sym = gensym("mtx");
mtx_sym2 = gensym ("matrix");
}
void iemtx_find_setup(void){
mtx_find_setup();
}
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