pqc/external/flint-2.4.3/nmod_poly/test/t-evaluate_nmod.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) 2010 William Hart
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "nmod_poly.h"
#include "ulong_extras.h"
#include "fmpz.h"
int
main(void)
{
int i, j, result = 1;
FLINT_TEST_INIT(state);
flint_printf("evaluate_nmod....");
fflush(stdout);
/* Check evaluation at 1 gives sum of coeffs */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
nmod_poly_t a;
mp_limb_t n = n_randtest_not_zero(state);
mp_limb_t sum, eval;
nmod_poly_init(a, n);
nmod_poly_randtest(a, state, n_randint(state, 100));
eval = nmod_poly_evaluate_nmod(a, 1);
sum = 0;
for (j = 0; j < a->length; j++)
sum = n_addmod(sum, nmod_poly_get_coeff_ui(a, j), n);
result = (sum == eval);
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a->length = %wd, n = %wu\n", a->length, a->mod.n);
flint_printf("sum = %wu, eval = %wu\n", sum, eval);
nmod_poly_print(a), flint_printf("\n\n");
abort();
}
nmod_poly_clear(a);
}
/* Check a(c) + b(c) = (a + b)(c) */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
nmod_poly_t a, b;
mp_limb_t n = n_randtest_not_zero(state);
mp_limb_t eval1, eval2, c;
nmod_poly_init(a, n);
nmod_poly_init(b, n);
nmod_poly_randtest(a, state, n_randint(state, 100));
nmod_poly_randtest(b, state, n_randint(state, 100));
c = n_randint(state, n);
eval1 = nmod_poly_evaluate_nmod(a, c);
eval1 = n_addmod(eval1, nmod_poly_evaluate_nmod(b, c), n);
nmod_poly_add(a, a, b);
eval2 = nmod_poly_evaluate_nmod(a, c);
result = (eval1 == eval2);
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("eval1 = %wu, eval2 = %wu\n", eval1, eval2);
nmod_poly_print(a), flint_printf("\n\n");
nmod_poly_print(b), flint_printf("\n\n");
abort();
}
nmod_poly_clear(a);
nmod_poly_clear(b);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}