pqc/external/flint-2.4.3/arith/test/t-dedekind_sum_coprime_d.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) 2011 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpq.h"
#include "arith.h"
#include "ulong_extras.h"
#include "math.h"
int main(void)
{
double s1, s2f;
fmpz_t hh, kk;
fmpq_t s2;
slong h, k;
FLINT_TEST_INIT(state);
flint_printf("dedekind_sum_coprime_d....");
fflush(stdout);
fmpz_init(hh);
fmpz_init(kk);
fmpq_init(s2);
for (k = 0; k < 300; k++)
{
for (h = 0; h <= k; h++)
{
if (n_gcd(k, h) == 1)
{
fmpz_set_si(hh, h);
fmpz_set_si(kk, k);
s1 = arith_dedekind_sum_coprime_d(h, k);
arith_dedekind_sum_naive(s2, hh, kk);
s2f = ((double)fmpz_get_si(fmpq_numref(s2))) /
fmpz_get_si(fmpq_denref(s2));
if (fabs(s1 - s2f) > 1e-10)
{
flint_printf("FAIL:\n");
flint_printf("s(%wd,%wd)\n", h, k);
flint_printf("s1: %.20f\n", s1);
flint_printf("s2: %.20f\n", s2f);
flint_printf("Exact: "); fmpq_print(s2); flint_printf("\n");
abort();
}
}
}
}
fmpz_clear(hh);
fmpz_clear(kk);
fmpq_clear(s2);
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}