t-cmp_ui.c
上传用户:qaz666999
上传日期:2022-08-06
资源大小:2570k
文件大小:2k
- /* Test mpq_cmp_ui.
- Copyright 1996, 1997, 2001, 2002 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"
- #define NUM(x) (&((x)->_mp_num))
- #define DEN(x) (&((x)->_mp_den))
- #define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
- int
- ref_mpq_cmp_ui (mpq_t a, unsigned long int bn, unsigned long int bd)
- {
- mpz_t ai, bi;
- int cc;
- mpz_init (ai);
- mpz_init (bi);
- mpz_mul_ui (ai, NUM (a), bd);
- mpz_mul_ui (bi, DEN (a), bn);
- cc = mpz_cmp (ai, bi);
- mpz_clear (ai);
- mpz_clear (bi);
- return cc;
- }
- #ifndef SIZE
- #define SIZE 8 /* increasing this lowers the probabilty of finding an error */
- #endif
- int
- main (int argc, char **argv)
- {
- mpq_t a, b;
- mp_size_t size;
- int reps = 10000;
- int i;
- int cc, ccref;
- unsigned long int bn, bd;
- tests_start ();
- if (argc == 2)
- reps = atoi (argv[1]);
- mpq_init (a);
- mpq_init (b);
- for (i = 0; i < reps; i++)
- {
- size = urandom () % SIZE - SIZE/2;
- mpz_random2 (NUM (a), size);
- do
- {
- size = urandom () % SIZE - SIZE/2;
- mpz_random2 (DEN (a), size);
- }
- while (mpz_cmp_ui (DEN (a), 0) == 0);
- mpz_random2 (NUM (b), (mp_size_t) 1);
- mpz_mod_ui (NUM (b), NUM (b), ~(unsigned long int) 0);
- mpz_add_ui (NUM (b), NUM (b), 1);
- mpz_random2 (DEN (b), (mp_size_t) 1);
- mpz_mod_ui (DEN (b), DEN (b), ~(unsigned long int) 0);
- mpz_add_ui (DEN (b), DEN (b), 1);
- mpq_canonicalize (a);
- mpq_canonicalize (b);
- bn = mpz_get_ui (NUM (b));
- bd = mpz_get_ui (DEN (b));
- ccref = ref_mpq_cmp_ui (a, bn, bd);
- cc = mpq_cmp_ui (a, bn, bd);
- if (SGN (ccref) != SGN (cc))
- abort ();
- }
- mpq_clear (a);
- mpq_clear (b);
- tests_end ();
- exit (0);
- }