pqc/external/flint-2.4.3/ulong_extras/test/t-is_strong_probabprime2_preinv.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) 2009 William Hart
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
int main(void)
{
int i, result;
ulong count = UWORD(0);
FLINT_TEST_INIT(state);
flint_printf("is_strong_probabprime2_preinv....");
fflush(stdout);
for (i = 0; i < 100 * flint_test_multiplier(); i++) /* Test that primes pass the test */
{
mp_limb_t a, d, dinv, norm;
mpz_t d_m;
ulong j;
mpz_init(d_m);
do
{
d = n_randtest(state) | 1;
flint_mpz_set_ui(d_m, d);
mpz_nextprime(d_m, d_m);
d = flint_mpz_get_ui(d_m);
} while (mpz_size(d_m) > 1);
if (d == UWORD(2)) d++;
for (j = 0; j < 100; j++)
{
do a = n_randtest(state) % d;
while (a == UWORD(0));
dinv = n_preinvert_limb(d);
count_trailing_zeros(norm, d - 1);
result = n_is_strong_probabprime2_preinv(d, dinv, a, (d - 1)>>norm);
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a = %wu, d = %wu\n", a, d);
abort();
}
}
mpz_clear(d_m);
}
for (i = 0; i < 100 * flint_test_multiplier(); i++) /* Test that not too many composites pass */
{
mp_limb_t a, d, dinv, norm;
mpz_t d_m;
ulong j;
mpz_init(d_m);
do
{
d = n_randtest(state) | 1;
if (d == UWORD(1)) d++;
flint_mpz_set_ui(d_m, d);
} while (mpz_probab_prime_p(d_m, 12));
for (j = 0; j < 100; j++)
{
do a = n_randtest(state) % d;
while (a == UWORD(0));
dinv = n_preinvert_limb(d);
count_trailing_zeros(norm, d - 1);
result = !n_is_strong_probabprime2_preinv(d, dinv, a, (d - 1)>>norm);
if (!result) count++;
}
mpz_clear(d_m);
}
#if FLINT64
if (count > 220 * flint_test_multiplier())
#else
if (count > 430 * flint_test_multiplier())
#endif
{
flint_printf("FAIL:\n");
flint_printf("count = %wu\n", count);
abort();
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}