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/* Test mpz_sizeinbase.
Copyright 2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite 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 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite 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
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "tests.h"
#if 0
/* Disabled due to the bogosity of trying to fake an _mp_d pointer to
below an object. Has been seen to fail on a hppa system and on ia64. */
/* Create a fake mpz consisting of just a single 1 bit, with totbits being
the total number of bits, inclusive of that 1 bit. */
void
mpz_fake_bits (mpz_ptr z, unsigned long totbits)
{
static mp_limb_t n;
unsigned long zero_bits, zero_limbs;
zero_bits = totbits - 1;
zero_limbs = zero_bits / GMP_NUMB_BITS;
zero_bits %= GMP_NUMB_BITS;
SIZ(z) = zero_limbs + 1;
PTR(z) = (&n) - (SIZ(z) - 1);
n = CNST_LIMB(1) << zero_bits;
ASSERT_ALWAYS (mpz_sizeinbase (z, 2) == totbits);
}
/* This was seen to fail on a GNU/Linux powerpc32 with gcc 2.95.2,
apparently due to a doubtful value of mp_bases[10].chars_per_bit_exactly
(0X1.34413509F79FDP-2 whereas 0X1.34413509F79FFP-2 is believed correct).
Presumably this is a glibc problem when gcc converts the decimal string
in mp_bases.c, or maybe it's only a function of the rounding mode during
compilation. */
void
check_sample (void)
{
unsigned long totbits = 198096465;
int base = 10;
size_t want = 59632979;
size_t got;
mpz_t z;
mpz_fake_bits (z, totbits);
got = mpz_sizeinbase (z, base);
if (got != want)
{
printf ("mpz_sizeinbase\n");
printf (" base %d\n", base);
printf (" totbits %lu\n", totbits);
printf (" got %u\n", got);
printf (" want %u\n", want);
abort ();
}
}
#endif
int
main (void)
{
tests_start ();
/* check_sample (); */
tests_end ();
exit (0);
}
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