57 lines
1.8 KiB
C
57 lines
1.8 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) 2011 Fredrik Johansson
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <gmp.h>
|
||
|
|
#include "flint.h"
|
||
|
|
#include "nmod_mat.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
nmod_mat_randtril(nmod_mat_t mat, flint_rand_t state, int unit)
|
||
|
|
{
|
||
|
|
slong i, j;
|
||
|
|
|
||
|
|
for (i = 0; i < mat->r; i++)
|
||
|
|
{
|
||
|
|
for (j = 0; j < mat->c; j++)
|
||
|
|
{
|
||
|
|
if (j < i)
|
||
|
|
{
|
||
|
|
nmod_mat_entry(mat, i, j) = n_randlimb(state) % (mat->mod.n);
|
||
|
|
}
|
||
|
|
else if (i == j)
|
||
|
|
{
|
||
|
|
nmod_mat_entry(mat, i, j) = n_randlimb(state) % (mat->mod.n);
|
||
|
|
if (unit || nmod_mat_entry(mat, i, j) == UWORD(0))
|
||
|
|
nmod_mat_entry(mat, i, j) = UWORD(1);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
nmod_mat_entry(mat, i, j) = UWORD(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|