Quelle t-lcm.c
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/* Test mpz_lcm and mpz_lcm_ui.
Copyright 2001 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 <string.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=%d\n" , 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=%d\n" , inplace);
printf (
"yu=%lu\n" , 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);
/* Check zeros. */
mpz_set_ui (want,
0 );
mpz_set_ui (x,
1 );
check_all (want, want, want);
check_all (want, want, x);
check_all (want, x, want);
/* New prime each time. */
mpz_set_ui (want,
1 L);
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,
1 L);
mpz_set_ui (x,
1 L);
mpz_set_ui (y,
1 L);
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 );
}
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