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/*
Copyright (C) 2012 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "acb_poly.h"
int main()
{
slong iter;
flint_rand_t state;
flint_printf("interpolate_barycentric....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000 * arb_test_multiplier(); iter++)
{
slong i, n, qbits1, qbits2, rbits1, rbits2, rbits3;
fmpq_poly_t P;
acb_poly_t R, S;
fmpq_t t, u;
acb_ptr xs, ys;
fmpq_poly_init(P);
acb_poly_init(R);
acb_poly_init(S);
fmpq_init(t);
fmpq_init(u);
qbits1 = 2 + n_randint(state, 200);
qbits2 = 2 + n_randint(state, 5);
rbits1 = 2 + n_randint(state, 200);
rbits2 = 2 + n_randint(state, 200);
rbits3 = 2 + n_randint(state, 200);
fmpq_poly_randtest(P, state, 1 + n_randint(state, 20), qbits1);
n = P->length;
xs = _acb_vec_init(n);
ys = _acb_vec_init(n);
acb_poly_set_fmpq_poly(R, P, rbits1);
if (n > 0)
{
fmpq_randtest(t, state, qbits2);
acb_set_fmpq(xs, t, rbits2);
for (i = 1; i < n; i++)
{
fmpq_randtest_not_zero(u, state, qbits2);
fmpq_abs(u, u);
fmpq_add(t, t, u);
acb_set_fmpq(xs + i, t, rbits2);
}
}
for (i = 0; i < n; i++)
acb_poly_evaluate(ys + i, R, xs + i, rbits2);
acb_poly_interpolate_barycentric(S, xs, ys, n, rbits3);
if (!acb_poly_contains_fmpq_poly(S, P))
{
flint_printf("FAIL:\n");
flint_printf("P = "); fmpq_poly_print(P); flint_printf("\n\n");
flint_printf("R = "); acb_poly_printd(R, 15); flint_printf("\n\n");
flint_printf("S = "); acb_poly_printd(S, 15); flint_printf("\n\n");
flint_abort();
}
fmpq_poly_clear(P);
acb_poly_clear(R);
acb_poly_clear(S);
fmpq_clear(t);
fmpq_clear(u);
_acb_vec_clear(xs, n);
_acb_vec_clear(ys, n);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}
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