pqc/external/flint-2.4.3/fmpz_poly_mat/test/t-rank.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
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 <stdio.h>
#include <stdlib.h>
#include "flint.h"
#include "fmpz_mat.h"
#include "fmpz_poly.h"
#include "fmpz_poly_mat.h"
int
main(void)
{
slong i;
FLINT_TEST_INIT(state);
flint_printf("rank....");
fflush(stdout);
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
fmpz_poly_mat_t A;
fmpz_mat_t Ax;
fmpz_t x;
slong j, m, n, bits, deg, rank, zrank;
float density;
m = n_randint(state, 15);
n = n_randint(state, 15);
deg = 1 + n_randint(state, 5);
bits = 1 + n_randint(state, 100);
density = n_randint(state, 100) * 0.01;
fmpz_poly_mat_init(A, m, n);
fmpz_mat_init(Ax, m, n);
fmpz_init(x);
fmpz_poly_mat_randtest_sparse(A, state, deg, bits, density);
/* Probabilistic rank computation */
zrank = 0;
for (j = 0; j < 5; j++)
{
slong r;
fmpz_randbits(x, state, 15);
fmpz_poly_mat_evaluate_fmpz(Ax, A, x);
r = fmpz_mat_rank(Ax);
zrank = FLINT_MAX(zrank, r);
}
rank = fmpz_poly_mat_rank(A);
if (rank != zrank)
{
flint_printf("FAIL:\n");
flint_printf("A:\n");
fmpz_poly_mat_print(A, "x");
flint_printf("Computed rank: %wd (zrank = %wd)\n", rank, zrank);
abort();
}
fmpz_clear(x);
fmpz_mat_clear(Ax);
fmpz_poly_mat_clear(A);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}