t-lcm.c
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上传日期:2022-08-06
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文件大小:4k
- /* Test mpz_lcm and mpz_lcm_ui.
- Copyright 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 <string.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- void
- check_all (mpz_ptr want, mpz_srcptr x_orig, mpz_srcptr y_orig)
- {
- mpz_t got, x, y;
- int negx, negy, swap, inplace;
- mpz_init (got);
- mpz_init_set (x, x_orig);
- mpz_init_set (y, y_orig);
- for (swap = 0; swap < 2; swap++)
- {
- mpz_swap (x, y);
- for (negx = 0; negx < 2; negx++)
- {
- mpz_neg (x, x);
- for (negy = 0; negy < 2; negy++)
- {
- mpz_neg (y, y);
- for (inplace = 0; inplace <= 1; inplace++)
- {
- if (inplace)
- { mpz_set (got, x); mpz_lcm (got, got, y); }
- else
- mpz_lcm (got, x, y);
- MPZ_CHECK_FORMAT (got);
- if (mpz_cmp (got, want) != 0)
- {
- printf ("mpz_lcm wrong, inplace=%dn", inplace);
- fail:
- mpz_trace ("x", x);
- mpz_trace ("y", y);
- mpz_trace ("got", got);
- mpz_trace ("want", want);
- abort ();
- }
- if (mpz_fits_ulong_p (y))
- {
- unsigned long yu = mpz_get_ui (y);
- if (inplace)
- { mpz_set (got, x); mpz_lcm_ui (got, got, yu); }
- else
- mpz_lcm_ui (got, x, yu);
- if (mpz_cmp (got, want) != 0)
- {
- printf ("mpz_lcm_ui wrong, inplace=%dn", inplace);
- printf ("yu=%lun", yu);
- goto fail;
- }
- }
- }
- }
- }
- }
- mpz_clear (got);
- mpz_clear (x);
- mpz_clear (y);
- }
- void
- check_primes (void)
- {
- static unsigned long prime[] = {
- 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,
- 101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,
- 191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277,
- 281,283,293,307,311,313,317,331,337,347,349,353,359,367,373,379,383,
- 389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,
- };
- mpz_t want, x, y;
- int i;
- mpz_init (want);
- mpz_init (x);
- mpz_init (y);
- /* New prime each time. */
- mpz_set_ui (want, 1L);
- for (i = 0; i < numberof (prime); i++)
- {
- mpz_set (x, want);
- mpz_set_ui (y, prime[i]);
- mpz_mul_ui (want, want, prime[i]);
- check_all (want, x, y);
- }
- /* Old prime each time. */
- mpz_set (x, want);
- for (i = 0; i < numberof (prime); i++)
- {
- mpz_set_ui (y, prime[i]);
- check_all (want, x, y);
- }
- /* One old, one new each time. */
- mpz_set_ui (want, prime[0]);
- for (i = 1; i < numberof (prime); i++)
- {
- mpz_set (x, want);
- mpz_set_ui (y, prime[i] * prime[i-1]);
- mpz_mul_ui (want, want, prime[i]);
- check_all (want, x, y);
- }
- /* Triplets with A,B in x and B,C in y. */
- mpz_set_ui (want, 1L);
- mpz_set_ui (x, 1L);
- mpz_set_ui (y, 1L);
- for (i = 0; i+2 < numberof (prime); i += 3)
- {
- mpz_mul_ui (want, want, prime[i]);
- mpz_mul_ui (want, want, prime[i+1]);
- mpz_mul_ui (want, want, prime[i+2]);
- mpz_mul_ui (x, x, prime[i]);
- mpz_mul_ui (x, x, prime[i+1]);
- mpz_mul_ui (y, y, prime[i+1]);
- mpz_mul_ui (y, y, prime[i+2]);
- check_all (want, x, y);
- }
- mpz_clear (want);
- mpz_clear (x);
- mpz_clear (y);
- }
- int
- main (int argc, char *argv[])
- {
- tests_start ();
- check_primes ();
- tests_end ();
- exit (0);
- }