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

87 lines
2.1 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) 2010 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "flint.h"
#include "fmpz_poly.h"
#include "arith.h"
#include "ulong_extras.h"
void arith_divisors_naive(fmpz_poly_t p, slong n)
{
slong k;
slong i = 0;
n = FLINT_ABS(n);
fmpz_poly_zero(p);
for (k = 1; k <= n; k++)
{
if (n % k == 0)
{
fmpz_poly_set_coeff_si(p, i, k);
i++;
}
}
}
int main(void)
{
fmpz_t t;
fmpz_poly_t a, b;
slong n;
FLINT_TEST_INIT(state);
flint_printf("divisors....");
fflush(stdout);
fmpz_init(t);
fmpz_poly_init(a);
fmpz_poly_init(b);
for (n = -1000; n < 1000; n++)
{
fmpz_set_si(t, n);
arith_divisors(a, t);
arith_divisors_naive(b, n);
if (!fmpz_poly_equal(a, b))
{
flint_printf("FAIL:\n");
flint_printf("wrong value for n=%wd\n", n);
abort();
}
}
fmpz_clear(t);
fmpz_poly_clear(a);
fmpz_poly_clear(b);
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}