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
|
/*
Copyright (C) 2020 Fredrik Johansson
This file is part of Calcium.
Calcium is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "ca_mat.h"
void
ca_mat_randops(ca_mat_t mat, flint_rand_t state, slong count, ca_ctx_t ctx)
{
slong c, i, j, k;
slong m = mat->r;
slong n = mat->c;
if (mat->r == 0 || mat->c == 0)
return;
for (c = 0; c < count; c++)
{
if (n_randint(state, 2))
{
if ((i = n_randint(state, m)) == (j = n_randint(state, m)))
continue;
if (n_randint(state, 2))
for (k = 0; k < n; k++)
ca_add(ca_mat_entry(mat, j, k), ca_mat_entry(mat, j, k), ca_mat_entry(mat, i, k), ctx);
else
for (k = 0; k < n; k++)
ca_sub(ca_mat_entry(mat, j, k), ca_mat_entry(mat, j, k), ca_mat_entry(mat, i, k), ctx);
}
else
{
if ((i = n_randint(state, n)) == (j = n_randint(state, n)))
continue;
if (n_randint(state, 2))
for (k = 0; k < m; k++)
ca_add(ca_mat_entry(mat, k, j), ca_mat_entry(mat, k, j), ca_mat_entry(mat, k, i), ctx);
else
for (k = 0; k < m; k++)
ca_sub(ca_mat_entry(mat, k, j), ca_mat_entry(mat, k, j), ca_mat_entry(mat, k, i), ctx);
}
}
}
|
