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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_slice_class;
typedef struct _MTXslice_ MTXslice;
struct _MTXslice_
{
t_object x_obj;
int slice_size;
int slice_startcol;
int slice_startrow;
int slice_stopcol;
int slice_stoprow;
t_outlet *list_outlet;
t_atom *list_out;
};
static void deleteMTXSlice (MTXslice *mtx_slice_obj)
{
if (mtx_slice_obj->list_out)
freebytes (mtx_slice_obj->list_out, sizeof(t_atom)*(mtx_slice_obj->slice_size+2));
}
static void mTXSliceIndexList (MTXslice *mtx_slice_obj, t_symbol *s,
int argc, t_atom *argv)
{
int startcol;
int startrow;
int stopcol;
int stoprow;
t_symbol *endsym = gensym("end");
if (argc<4) {
post("mtx_slice: invalid index vector: <startrow><startcol><stoprow><stopcol>");
return;
}
startrow = atom_getint(&argv[0]);
startcol = atom_getint(&argv[1]);
stoprow = atom_getint(&argv[2]);
stopcol = atom_getint(&argv[3]);
if (atom_getsymbol(&argv[0])==endsym) {
startrow = -1;
}
if (atom_getsymbol(&argv[1])==endsym) {
startcol = -1;
}
if (atom_getsymbol(&argv[2])==endsym) {
stoprow = -1;
}
if (atom_getsymbol(&argv[3])==endsym) {
stopcol = -1;
}
if (((startrow<1) && (atom_getsymbol(&argv[0])!=endsym)) ||
((startcol<1) && (atom_getsymbol(&argv[1])!=endsym))) {
post("mtx_slice: row and column indices must be >0, or misused \"end\" keyword");
return;
}
if (((startrow>stoprow) && (atom_getsymbol(&argv[2])!=endsym)) ||
((startcol>stopcol) && (atom_getsymbol (&argv[3])!=endsym))) {
post("mtx_slice: start_index<stop_index for rows and columns, or misused \"end\" keyword");
return;
}
mtx_slice_obj->slice_startrow = startrow;
mtx_slice_obj->slice_startcol = startcol;
mtx_slice_obj->slice_stoprow = stoprow;
mtx_slice_obj->slice_stopcol = stopcol;
}
static void *newMTXSlice (t_symbol *s, int argc, t_atom *argv)
{
MTXslice *mtx_slice_obj = (MTXslice *) pd_new (mtx_slice_class);
if (argc==4)
mTXSliceIndexList (mtx_slice_obj, gensym("list"),argc,argv);
else {
mtx_slice_obj->slice_startrow = 1;
mtx_slice_obj->slice_startcol = 1;
mtx_slice_obj->slice_stopcol = -1;
mtx_slice_obj->slice_stoprow = -1;
}
mtx_slice_obj->list_outlet = outlet_new (&mtx_slice_obj->x_obj, gensym("matrix"));
inlet_new(&mtx_slice_obj->x_obj, &mtx_slice_obj->x_obj.ob_pd, gensym("list"),gensym(""));
return ((void *) mtx_slice_obj);
}
static void mTXSliceBang (MTXslice *mtx_slice_obj)
{
if (mtx_slice_obj->list_out)
outlet_anything(mtx_slice_obj->list_outlet, gensym("matrix"),
mtx_slice_obj->slice_size+2, mtx_slice_obj->list_out);
}
/*
static void copyList (int size, t_atom *x, t_atom *y)
{
while(size--)
*y++=*x++;
}
*/
static void writeVectorIntoList (int n, t_atom *x, t_atom *y)
{
for (;n--;x++,y++)
*y = *x;
}
static void writeSliceIntoList (int slicerows, const int slicecols, int columns, t_atom *x, t_atom *y)
{
for (;slicerows--;x+=columns,y+=slicecols)
writeVectorIntoList(slicecols, x, y);
}
static void mTXSliceMatrix (MTXslice *mtx_slice_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_slice_obj->list_out;
int stopcol = mtx_slice_obj->slice_stopcol;
int stoprow = mtx_slice_obj->slice_stoprow;
int startrow = mtx_slice_obj->slice_startrow;
int startcol = mtx_slice_obj->slice_startcol;
int slicecols, slicerows, slicesize;
// size check
if (!size) {
post("mtx_slice: invalid dimensions");
return;
}
else if (list_size<size) {
post("mtx_slice: sparse matrix not yet supported: use \"mtx_check\"");
return;
}
startrow = (startrow==-1)?rows:startrow;
startcol = (startcol==-1)?columns:startcol;
stoprow = (stoprow==-1)?rows:stoprow;
stopcol = (stopcol==-1)?columns:stopcol;
if ((!startrow)||(!startcol)) {
post("mtx_slice: indices must be >0");
return;
}
if ((stopcol > columns) ||
(stoprow > rows)) {
post("mtx_slice: slice index exceeds matrix dimensions");
return;
}
if ((stoprow<startrow) || (stopcol<startcol)) {
post("mtx_slice: start_index<stop_index for rows and columns, or misused \"end\" keyword");
return;
}
slicerows = stoprow-startrow+1;
slicecols = stopcol-startcol+1;
slicesize = slicerows*slicecols;
// main part
if (slicesize != mtx_slice_obj->slice_size) {
if (!list_out)
list_out = (t_atom *) getbytes (sizeof (t_atom) * (slicesize + 2));
else
list_out = (t_atom *) resizebytes (list_out,
sizeof (t_atom) * (mtx_slice_obj->slice_size+2),
sizeof (t_atom) * (slicesize + 2));
mtx_slice_obj->slice_size = slicesize;
mtx_slice_obj->list_out = list_out;
}
list_out += 2;
list_in += columns * (startrow-1) + startcol-1;
writeSliceIntoList (slicerows, slicecols,
columns, list_in,list_out);
list_out = mtx_slice_obj->list_out;
SETSYMBOL(list_out, gensym("matrix"));
SETFLOAT(list_out, slicerows);
SETFLOAT(&list_out[1], slicecols);
outlet_anything(mtx_slice_obj->list_outlet, gensym("matrix"),
slicesize+2, list_out);
}
void mtx_slice_setup (void)
{
mtx_slice_class = class_new
(gensym("mtx_slice"),
(t_newmethod) newMTXSlice,
(t_method) deleteMTXSlice,
sizeof (MTXslice),
CLASS_DEFAULT, A_GIMME, 0);
class_addbang (mtx_slice_class, (t_method) mTXSliceBang);
class_addmethod (mtx_slice_class, (t_method) mTXSliceMatrix, gensym("matrix"), A_GIMME,0);
class_addmethod (mtx_slice_class, (t_method) mTXSliceIndexList, gensym(""), A_GIMME,0);
class_sethelpsymbol (mtx_slice_class, gensym("iemmatrix/mtx_slice"));
}
void iemtx_slice_setup(void){
mtx_slice_setup();
}
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