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/*
Copyright (C) 2009 William Hart
Copyright (C) 2010 Sebastian Pancratz
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "test_helpers.h"
#include <string.h>
#include "ulong_extras.h"
#include "fmpz.h"
TEST_FUNCTION_START(fmpz_sizeinbase, state)
{
int i, result;
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
{
fmpz_t a;
mpz_t b;
char * str;
int base;
size_t r1, exact;
fmpz_init(a);
mpz_init(b);
fmpz_randtest(a, state, 200);
base = (int) (n_randint(state, 61) + 2);
fmpz_get_mpz(b, a);
r1 = fmpz_sizeinbase(a, base);
/* exact size = length of |b| written in base b */
str = mpz_get_str(NULL, base, b);
exact = strlen(str) - (str[0] == '-');
flint_free(str);
result = (r1 == exact);
if (!result)
{
flint_printf("FAIL:\n");
gmp_printf("b = %Zd\n", b);
flint_printf("base = %d\n", base);
flint_printf("r1 = %wu, exact = %wu\n",
(ulong) r1, (ulong) exact);
fflush(stdout);
flint_abort();
}
fmpz_clear(a);
mpz_clear(b);
}
/* 10^19 - 1 has 19 decimal digits, not 20. */
{
fmpz_t a;
size_t r;
fmpz_init(a);
fmpz_set_ui(a, 10);
fmpz_pow_ui(a, a, 19);
fmpz_sub_ui(a, a, 1);
r = fmpz_sizeinbase(a, 10);
if (r != 19)
{
flint_printf("FAIL (10^19 - 1):\n");
flint_printf("fmpz_sizeinbase(10^19 - 1, 10) = %wu, expected 19\n",
(ulong) r);
fflush(stdout);
flint_abort();
}
fmpz_clear(a);
}
TEST_FUNCTION_END(state);
}