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

89 lines
2.5 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) 2009 William Hart
Copyright (C) 2013 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
int main()
{
slong i, lim = 1000000;
n_primes_t pg;
mp_limb_t * ref_primes;
double * ref_inverses;
FLINT_TEST_INIT(state);
flint_printf("compute_primes....");
fflush(stdout);
ref_primes = flint_malloc(sizeof(mp_limb_t) * lim);
ref_inverses = flint_malloc(sizeof(double) * lim);
n_primes_init(pg);
for (i = 0; i < lim; i++)
{
ref_primes[i] = n_primes_next(pg);
ref_inverses[i] = n_precompute_inverse(ref_primes[i]);
}
n_primes_clear(pg);
for (i = 0; i < 250; i++)
{
slong n;
const mp_limb_t * primes;
const double * inverses;
n = n_randtest(state) % lim;
primes = n_primes_arr_readonly(n + 1);
inverses = n_prime_inverses_arr_readonly(n + 1);
if (primes[n] != ref_primes[n] || inverses[n] != ref_inverses[n])
{
flint_printf("FAIL!\n");
flint_printf("n = %wd, p1 = %wu, p2 = %wu\n", n, primes[n], ref_primes[n]);
flint_printf("inv1 = %g, inv2 = %g\n", inverses[n], ref_inverses[n]);
abort();
}
if (n_randint(state, 20) == 0)
{
n_cleanup_primes();
}
}
flint_free(ref_primes);
flint_free(ref_inverses);
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}