pqc/external/flint-2.4.3/nmod_poly_mat/randtest_sparse.c
2014-05-24 23:16:06 +02:00

54 lines
1.7 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 "flint.h"
#include "nmod_poly.h"
#include "nmod_poly_mat.h"
#include "ulong_extras.h"
void
nmod_poly_mat_randtest_sparse(nmod_poly_mat_t A, flint_rand_t state, slong len,
float density)
{
slong i, j;
for (i = 0; i < A->r; i++)
{
for (j = 0; j < A->c; j++)
{
if (n_randint(state, 1000) < density * 1000)
{
slong l = n_randint(state, len + 1);
l = FLINT_MAX(l, 1);
nmod_poly_randtest(nmod_poly_mat_entry(A, i, j), state, l);
}
else
{
nmod_poly_zero(nmod_poly_mat_entry(A, i, j));
}
}
}
}