dive_ui.c
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上传日期:2022-08-06
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- /* Test mpz_divexact_ui.
- Copyright 1996, 2001 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser 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 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <stdio.h>
- #include <stdlib.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- void
- check_random (int argc, char *argv[])
- {
- gmp_randstate_ptr rands = RANDS;
- int reps = 500000;
- mpz_t a, q, got;
- int i, qneg;
- unsigned long d;
- if (argc == 2)
- reps = atoi (argv[1]);
- mpz_init (a);
- mpz_init (q);
- mpz_init (got);
- for (i = 0; i < reps; i++)
- {
- do
- d = (unsigned long) urandom();
- while (d == 0);
- mpz_erandomb (q, rands, 512);
- mpz_mul_ui (a, q, d);
- for (qneg = 0; qneg <= 1; qneg++)
- {
- mpz_divexact_ui (got, a, d);
- MPZ_CHECK_FORMAT (got);
- if (mpz_cmp (got, q) != 0)
- {
- printf ("mpz_divexact_ui wrongn");
- mpz_trace (" a", a);
- printf (" d=%lun", d);
- mpz_trace (" q", q);
- mpz_trace (" got", got);
- abort ();
- }
- mpz_neg (q, q);
- mpz_neg (a, a);
- }
- }
- mpz_clear (a);
- mpz_clear (q);
- mpz_clear (got);
- }
- int
- main (int argc, char **argv)
- {
- tests_start ();
- check_random (argc, argv);
- tests_end ();
- exit (0);
- }