145 lines
3.7 KiB
C
145 lines
3.7 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) 2011 Sebastian Pancratz
|
|
|
|
******************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <gmp.h>
|
|
#include "flint.h"
|
|
#include "ulong_extras.h"
|
|
#include "fmpz.h"
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
int i, result;
|
|
FLINT_TEST_INIT(state);
|
|
|
|
flint_printf("flog....");
|
|
fflush(stdout);
|
|
|
|
|
|
|
|
/* Check aliasing */
|
|
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
|
|
{
|
|
fmpz_t a;
|
|
slong l;
|
|
|
|
fmpz_init(a);
|
|
|
|
while (fmpz_cmp_ui(a, 2) < 0)
|
|
fmpz_randtest(a, state, 200);
|
|
|
|
l = fmpz_flog(a, a);
|
|
|
|
result = (l == 1);
|
|
if (!result)
|
|
{
|
|
flint_printf("FAIL:\n");
|
|
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
|
|
flint_printf("l = %wd\n", l);
|
|
abort();
|
|
}
|
|
|
|
fmpz_clear(a);
|
|
}
|
|
|
|
/* Check correctness */
|
|
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
|
|
{
|
|
fmpz_t a, b, x, y;
|
|
slong k;
|
|
|
|
fmpz_init(a);
|
|
fmpz_init(b);
|
|
fmpz_init(x);
|
|
fmpz_init(y);
|
|
|
|
while (fmpz_cmp_ui(a, 1) < 0)
|
|
fmpz_randtest(a, state, 200);
|
|
while (fmpz_cmp_ui(b, 2) < 0)
|
|
fmpz_randtest(b, state, 200);
|
|
|
|
k = fmpz_flog(a, b);
|
|
|
|
fmpz_pow_ui(x, b, k);
|
|
fmpz_pow_ui(y, b, k + 1);
|
|
|
|
result = (fmpz_cmp(x, a) <= 0 && fmpz_cmp(a, y) < 0);
|
|
if (!result)
|
|
{
|
|
flint_printf("FAIL:\n");
|
|
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
|
|
flint_printf("b = "), fmpz_print(b), flint_printf("\n");
|
|
flint_printf("x = "), fmpz_print(x), flint_printf("\n");
|
|
flint_printf("y = "), fmpz_print(y), flint_printf("\n");
|
|
flint_printf("k = %wd\n", k);
|
|
abort();
|
|
}
|
|
|
|
fmpz_clear(a);
|
|
fmpz_clear(b);
|
|
fmpz_clear(x);
|
|
fmpz_clear(y);
|
|
}
|
|
|
|
/* Check correctness: exact powers */
|
|
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
|
|
{
|
|
fmpz_t a, b;
|
|
slong k, l;
|
|
|
|
fmpz_init(a);
|
|
fmpz_init(b);
|
|
|
|
while (fmpz_cmp_ui(b, 2) < 0)
|
|
fmpz_randtest(b, state, 200);
|
|
l = n_randint(state, 20);
|
|
fmpz_pow_ui(a, b, l);
|
|
|
|
k = fmpz_flog(a, b);
|
|
|
|
result = (k == l);
|
|
if (!result)
|
|
{
|
|
flint_printf("FAIL:\n");
|
|
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
|
|
flint_printf("b = "), fmpz_print(b), flint_printf("\n");
|
|
flint_printf("k = %wd\n", k);
|
|
flint_printf("l = %wd\n", l);
|
|
abort();
|
|
}
|
|
|
|
fmpz_clear(a);
|
|
fmpz_clear(b);
|
|
}
|
|
|
|
FLINT_TEST_CLEANUP(state);
|
|
|
|
flint_printf("PASS\n");
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|