pqc/external/flint-2.4.3/nmod_poly/test/t-interpolate_nmod_vec_barycentric.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
Copyright (C) 2011 Fredrik Johansson
******************************************************************************/
#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, result = 1;
FLINT_TEST_INIT(state);
flint_printf("interpolate_nmod_vec_barycentric....");
fflush(stdout);
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
nmod_poly_t P, Q;
mp_ptr x, y;
mp_limb_t mod;
slong j, n, npoints;
mod = n_randtest_prime(state, 0);
npoints = n_randint(state, FLINT_MIN(100, mod));
n = n_randint(state, npoints + 1);
nmod_poly_init(P, mod);
nmod_poly_init(Q, mod);
x = _nmod_vec_init(npoints);
y = _nmod_vec_init(npoints);
nmod_poly_randtest(P, state, n);
for (j = 0; j < npoints; j++)
x[j] = j;
nmod_poly_evaluate_nmod_vec(y, P, x, npoints);
nmod_poly_interpolate_nmod_vec_barycentric(Q, x, y, npoints);
result = nmod_poly_equal(P, Q);
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("mod=%wu, n=%wd, npoints=%wd\n\n", mod, n, npoints);
nmod_poly_print(P), flint_printf("\n\n");
nmod_poly_print(Q), flint_printf("\n\n");
abort();
}
nmod_poly_clear(P);
nmod_poly_clear(Q);
_nmod_vec_clear(x);
_nmod_vec_clear(y);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}