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/* Test mpz_hamdist.
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"
void
check_twobits (void)
{
unsigned long i, j, got, want;
mpz_t x, y;
mpz_init (x);
mpz_init (y);
for (i = 0; i < 5 * GMP_NUMB_BITS; i++)
{
for (j = 0; j < 5 * GMP_NUMB_BITS; j++)
{
mpz_set_ui (x, 0L);
mpz_setbit (x, i);
mpz_set_ui (y, 0L);
mpz_setbit (y, j);
want = 2 * (i != j);
got = mpz_hamdist (x, y);
if (got != want)
{
printf ("mpz_hamdist wrong on 2 bits pos/pos\n");
wrong:
printf (" i %lu\n", i);
printf (" j %lu\n", j);
printf (" got %lu\n", got);
printf (" want %lu\n", want);
mpz_trace (" x ", x);
mpz_trace (" y ", y);
abort();
}
mpz_neg (x, x);
mpz_neg (y, y);
want = ABS ((long) (i-j));
got = mpz_hamdist (x, y);
if (got != want)
{
printf ("mpz_hamdist wrong on 2 bits neg/neg\n");
goto wrong;
}
}
}
mpz_clear (x);
mpz_clear (y);
}
void
check_rand (void)
{
gmp_randstate_ptr rands = RANDS;
unsigned long got, want;
int i;
mpz_t x, y;
mpz_init (x);
mpz_init (y);
for (i = 0; i < 2000; i++)
{
mpz_erandomb (x, rands, 6 * GMP_NUMB_BITS);
mpz_negrandom (x, rands);
mpz_mul_2exp (x, x, urandom() % (4 * GMP_NUMB_BITS));
mpz_erandomb (y, rands, 6 * GMP_NUMB_BITS);
mpz_negrandom (y, rands);
mpz_mul_2exp (y, y, urandom() % (4 * GMP_NUMB_BITS));
want = refmpz_hamdist (x, y);
got = mpz_hamdist (x, y);
if (got != want)
{
printf ("mpz_hamdist wrong on random\n");
printf (" got %lu\n", got);
printf (" want %lu\n", want);
mpz_trace (" x ", x);
mpz_trace (" y ", y);
abort();
}
}
mpz_clear (x);
mpz_clear (y);
}
int
main (void)
{
tests_start ();
mp_trace_base = -16;
check_twobits ();
check_rand ();
tests_end ();
exit (0);
}
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