aboutsummaryrefslogtreecommitdiff
path: root/src/mtx_slice.c
blob: 58e6db25d8a9685d7a628201fc0cf1c7ea774f7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/*
 *  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();
}