129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/* Test mpz_hamdist.
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Copyright 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "mpir.h"
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#include "gmp-impl.h"
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#include "tests.h"
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void
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check_twobits (void)
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{
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unsigned long i, j, got, want;
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mpz_t x, y;
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mpz_init (x);
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mpz_init (y);
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for (i = 0; i < 5 * GMP_NUMB_BITS; i++)
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{
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for (j = 0; j < 5 * GMP_NUMB_BITS; j++)
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{
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mpz_set_ui (x, 0L);
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mpz_setbit (x, i);
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mpz_set_ui (y, 0L);
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mpz_setbit (y, j);
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want = 2 * (i != j);
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got = mpz_hamdist (x, y);
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if (got != want)
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{
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printf ("mpz_hamdist wrong on 2 bits pos/pos\n");
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wrong:
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printf (" i %lu\n", i);
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printf (" j %lu\n", j);
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printf (" got %lu\n", got);
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printf (" want %lu\n", want);
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mpz_trace (" x ", x);
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mpz_trace (" y ", y);
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abort();
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}
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mpz_neg (x, x);
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mpz_neg (y, y);
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want = ABS ((long) (i-j));
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got = mpz_hamdist (x, y);
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if (got != want)
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{
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printf ("mpz_hamdist wrong on 2 bits neg/neg\n");
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goto wrong;
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}
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}
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}
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mpz_clear (x);
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mpz_clear (y);
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}
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void
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check_rand (void)
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{
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gmp_randstate_t rands;
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unsigned long got, want;
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int i;
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mpz_t x, y;
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mpz_init (x);
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mpz_init (y);
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gmp_randinit_default(rands);
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for (i = 0; i < 2000; i++)
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{
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mpz_erandomb (x, rands, 6 * GMP_NUMB_BITS);
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mpz_negrandom (x, rands);
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mpz_mul_2exp (x, x, urandom() % (4 * GMP_NUMB_BITS));
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mpz_erandomb (y, rands, 6 * GMP_NUMB_BITS);
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mpz_negrandom (y, rands);
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mpz_mul_2exp (y, y, urandom() % (4 * GMP_NUMB_BITS));
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want = refmpz_hamdist (x, y);
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got = mpz_hamdist (x, y);
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if (got != want)
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{
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printf ("mpz_hamdist wrong on random\n");
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printf (" got %lu\n", got);
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printf (" want %lu\n", want);
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mpz_trace (" x ", x);
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mpz_trace (" y ", y);
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abort();
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}
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}
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mpz_clear (x);
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mpz_clear (y);
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gmp_randclear(rands);
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}
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int
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main (void)
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{
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tests_start ();
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mp_trace_base = -16;
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check_twobits ();
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check_rand ();
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tests_end ();
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exit (0);
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}
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