pqc/external/flint-2.4.3/fmpz_mat/test/t-det_modular.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 <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_vec.h"
#include "fmpz_mat.h"
#include "ulong_extras.h"
int
main(void)
{
fmpz_mat_t A;
slong i, m;
fmpz_t det1, det2;
FLINT_TEST_INIT(state);
flint_printf("det_modular....");
fflush(stdout);
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
int proved = n_randlimb(state) % 2;
m = n_randint(state, 10);
fmpz_mat_init(A, m, m);
fmpz_init(det1);
fmpz_init(det2);
fmpz_mat_randtest(A, state, 1+n_randint(state,200));
fmpz_mat_det_bareiss(det1, A);
fmpz_mat_det_modular(det2, A, proved);
if (!fmpz_equal(det1, det2))
{
flint_printf("FAIL:\n");
flint_printf("different determinants!\n");
fmpz_mat_print_pretty(A), flint_printf("\n");
flint_printf("det1: "), fmpz_print(det1), flint_printf("\n");
flint_printf("det2: "), fmpz_print(det2), flint_printf("\n");
abort();
}
fmpz_clear(det1);
fmpz_clear(det2);
fmpz_mat_clear(A);
}
for (i = 0; i < 10000; i++)
{
int proved = n_randlimb(state) % 2;
m = 2 + n_randint(state, 10);
fmpz_mat_init(A, m, m);
fmpz_init(det2);
fmpz_mat_randrank(A, state, 1+n_randint(state, m - 1),
1+n_randint(state, 10));
fmpz_mat_randops(A, state, n_randint(state, 2*m*m + 1));
fmpz_mat_det_modular(det2, A, proved);
if (!fmpz_is_zero(det2))
{
flint_printf("FAIL:\n");
flint_printf("expected zero determinant!\n");
fmpz_mat_print_pretty(A), flint_printf("\n");
abort();
}
fmpz_mat_clear(A);
fmpz_clear(det2);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}