pqc/external/flint-2.4.3/nmod_poly_mat/test/t-mul_interpolate.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 "nmod_mat.h"
#include "nmod_poly.h"
#include "nmod_poly_mat.h"
#include "fmpz.h"
int
main(void)
{
slong i;
FLINT_TEST_INIT(state);
flint_printf("mul_interpolate....");
fflush(stdout);
/* Check evaluation homomorphism */
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
nmod_poly_mat_t A, B, C;
nmod_mat_t a, b, c, d;
mp_limb_t mod, x;
slong m, n, k, deg;
mod = n_randtest_prime(state, 0);
m = n_randint(state, 20);
n = n_randint(state, 20);
k = n_randint(state, 20);
deg = 1 + n_randint(state, 10);
nmod_poly_mat_init(A, m, n, mod);
nmod_poly_mat_init(B, n, k, mod);
nmod_poly_mat_init(C, m, k, mod);
nmod_mat_init(a, m, n, mod);
nmod_mat_init(b, n, k, mod);
nmod_mat_init(c, m, k, mod);
nmod_mat_init(d, m, k, mod);
nmod_poly_mat_randtest(A, state, deg);
nmod_poly_mat_randtest(B, state, deg);
nmod_poly_mat_randtest(C, state, deg); /* noise in output */
if (nmod_poly_mat_max_length(A)
+ nmod_poly_mat_max_length(B) - 1 <= mod)
{
nmod_poly_mat_mul_interpolate(C, A, B);
x = n_randint(state, mod);
nmod_poly_mat_evaluate_nmod(a, A, x);
nmod_poly_mat_evaluate_nmod(b, B, x);
nmod_poly_mat_evaluate_nmod(d, C, x);
nmod_mat_mul(c, a, b);
if (!nmod_mat_equal(c, d))
{
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("C:\n");
nmod_poly_mat_print(C, "x");
flint_printf("\n");
abort();
}
}
nmod_poly_mat_clear(A);
nmod_poly_mat_clear(B);
nmod_poly_mat_clear(C);
nmod_mat_clear(a);
nmod_mat_clear(b);
nmod_mat_clear(c);
nmod_mat_clear(d);
}
/* Check aliasing C and A */
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
nmod_poly_mat_t A, B, C;
slong m, n, deg;
mp_limb_t mod;
mod = n_randtest_prime(state, 0);
m = n_randint(state, 20);
n = n_randint(state, 20);
deg = 1 + n_randint(state, 10);
nmod_poly_mat_init(A, m, n, mod);
nmod_poly_mat_init(B, n, n, mod);
nmod_poly_mat_init(C, m, n, mod);
nmod_poly_mat_randtest(A, state, deg);
nmod_poly_mat_randtest(B, state, deg);
nmod_poly_mat_randtest(C, state, deg); /* noise in output */
if (nmod_poly_mat_max_length(A)
+ nmod_poly_mat_max_length(B) - 1 <= mod)
{
nmod_poly_mat_mul_interpolate(C, A, B);
nmod_poly_mat_mul_interpolate(A, A, B);
if (!nmod_poly_mat_equal(C, A))
{
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("C:\n");
nmod_poly_mat_print(C, "x");
flint_printf("\n");
abort();
}
}
nmod_poly_mat_clear(A);
nmod_poly_mat_clear(B);
nmod_poly_mat_clear(C);
}
/* Check aliasing C and B */
for (i = 0; i < 100 * flint_test_multiplier(); i++)
{
nmod_poly_mat_t A, B, C;
slong m, n, deg;
mp_limb_t mod;
mod = n_randtest_prime(state, 0);
m = n_randint(state, 20);
n = n_randint(state, 20);
deg = 1 + n_randint(state, 10);
nmod_poly_mat_init(A, m, m, mod);
nmod_poly_mat_init(B, m, n, mod);
nmod_poly_mat_init(C, m, n, mod);
nmod_poly_mat_randtest(A, state, deg);
nmod_poly_mat_randtest(B, state, deg);
nmod_poly_mat_randtest(C, state, deg); /* noise in output */
if (nmod_poly_mat_max_length(A)
+ nmod_poly_mat_max_length(B) - 1 <= mod)
{
nmod_poly_mat_mul_interpolate(C, A, B);
nmod_poly_mat_mul_interpolate(B, A, B);
if (!nmod_poly_mat_equal(C, B))
{
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("C:\n");
nmod_poly_mat_print(C, "x");
flint_printf("\n");
abort();
}
}
nmod_poly_mat_clear(A);
nmod_poly_mat_clear(B);
nmod_poly_mat_clear(C);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}