pqc/external/flint-2.4.3/ulong_extras/test/t-clog.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 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
int main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("clog....");
fflush(stdout);
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
{
mp_limb_t a = 0, b = 0, k, x;
while (a < 1)
a = n_randtest(state);
while (b < 2)
b = n_randtest(state);
k = n_clog(a, b);
x = (k > 0) ? n_pow(b, k - 1) : 0;
result = (x < a && ((k > 0) ? ((a + b - 1) / b <= x) : (a <= 1)));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a = %wu\n", a);
flint_printf("b = %wu\n", b);
flint_printf("x = %wu\n", x);
flint_printf("k = %wu\n", k);
}
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return EXIT_SUCCESS;
}