68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*=============================================================================
|
|
|
|
This file is part of FLINT.
|
|
|
|
FLINT is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
FLINT is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with FLINT; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2010 Fredrik Johansson
|
|
|
|
******************************************************************************/
|
|
|
|
#include "fmpz_mat.h"
|
|
|
|
void
|
|
fmpz_mat_randops(fmpz_mat_t mat, flint_rand_t state, slong count)
|
|
{
|
|
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++)
|
|
fmpz_add(&mat->rows[j][k], &mat->rows[j][k],
|
|
&mat->rows[i][k]);
|
|
else
|
|
for (k = 0; k < n; k++)
|
|
fmpz_sub(&mat->rows[j][k], &mat->rows[j][k],
|
|
&mat->rows[i][k]);
|
|
}
|
|
else
|
|
{
|
|
if ((i = n_randint(state, n)) == (j = n_randint(state, n)))
|
|
continue;
|
|
if (n_randint(state, 2))
|
|
for (k = 0; k < m; k++)
|
|
fmpz_add(&mat->rows[k][j], &mat->rows[k][j],
|
|
&mat->rows[k][i]);
|
|
else
|
|
for (k = 0; k < m; k++)
|
|
fmpz_sub(&mat->rows[k][j], &mat->rows[k][j],
|
|
&mat->rows[k][i]);
|
|
}
|
|
}
|
|
}
|