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

143 lines
4.3 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) 2011 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "flint.h"
#include "nmod_poly.h"
#include "nmod_poly_mat.h"
#include "fmpz.h"
int
main(void)
{
slong i;
FLINT_TEST_INIT(state);
flint_printf("solve....");
fflush(stdout);
for (i = 0; i < 200 * flint_test_multiplier(); i++)
{
nmod_poly_mat_t A, X, B, AX, Bden;
nmod_poly_t den, det;
slong n, m, deg;
float density;
int solved;
mp_limb_t mod;
mod = n_randtest_prime(state, 0);
n = n_randint(state, 15);
m = n_randint(state, 5);
deg = 1 + n_randint(state, 5);
density = n_randint(state, 100) * 0.01;
nmod_poly_mat_init(A, n, n, mod);
nmod_poly_mat_init(B, n, m, mod);
nmod_poly_mat_init(X, n, m, mod);
nmod_poly_mat_init(AX, n, m, mod);
nmod_poly_mat_init(Bden, n, m, mod);
nmod_poly_init(den, mod);
nmod_poly_init(det, mod);
nmod_poly_mat_randtest_sparse(A, state, deg, density);
nmod_poly_mat_randtest_sparse(B, state, deg, density);
solved = nmod_poly_mat_solve_fflu(X, den, A, B);
nmod_poly_mat_det_interpolate(det, A);
if (m == 0 || n == 0)
{
if (solved == 0)
{
flint_printf("FAIL: expected empty system to pass\n");
abort();
}
}
else
{
if (!nmod_poly_equal(den, det))
{
nmod_poly_neg(det, det);
if (!nmod_poly_equal(den, det))
{
nmod_poly_neg(det, det);
flint_printf("FAIL: den != +/- det(A)\n");
flint_printf("den:\n"); nmod_poly_print(den);
flint_printf("\n\n");
flint_printf("det:\n"); nmod_poly_print(det);
flint_printf("\n\n");
flint_printf("A:\n");
nmod_poly_mat_print(A, "x");
flint_printf("B:\n");
nmod_poly_mat_print(B, "x");
flint_printf("X:\n");
nmod_poly_mat_print(X, "x");
abort();
}
}
}
if (solved != !nmod_poly_is_zero(den))
{
flint_printf("FAIL: return value does not match denominator\n");
abort();
}
nmod_poly_mat_mul(AX, A, X);
nmod_poly_mat_scalar_mul_nmod_poly(Bden, B, den);
if (!nmod_poly_mat_equal(AX, Bden))
{
flint_printf("FAIL:\n");
flint_printf("A:\n");
nmod_poly_mat_print(A, "x");
flint_printf("B:\n");
nmod_poly_mat_print(B, "x");
flint_printf("X:\n");
nmod_poly_mat_print(X, "x");
flint_printf("AX:\n");
nmod_poly_mat_print(AX, "x");
flint_printf("Bden:\n");
nmod_poly_mat_print(Bden, "x");
abort();
}
nmod_poly_clear(den);
nmod_poly_clear(det);
nmod_poly_mat_clear(A);
nmod_poly_mat_clear(B);
nmod_poly_mat_clear(X);
nmod_poly_mat_clear(AX);
nmod_poly_mat_clear(Bden);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}