| /* Exercise mpz_fac_ui. |
| |
| Copyright 2000, 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" |
| |
| |
| /* Usage: t-fac_ui [x|num] |
| |
| With no arguments testing goes up to the initial value of "limit" below. |
| With a number argument tests are carried that far, or with a literal "x" |
| tests are continued without limit (this being meant only for development |
| purposes). */ |
| |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| unsigned long n; |
| unsigned long limit = 1500; |
| mpz_t f, r; |
| |
| tests_start (); |
| |
| if (argc > 1 && argv[1][0] == 'x') |
| limit = ULONG_MAX; |
| else if (argc > 1) |
| limit = atoi (argv[1]); |
| |
| /* for small limb testing */ |
| limit = MIN (limit, MP_LIMB_T_MAX); |
| |
| mpz_init_set_ui (f, 1); /* 0! = 1 */ |
| mpz_init (r); |
| |
| for (n = 0; n < limit; n++) |
| { |
| mpz_fac_ui (r, n); |
| MPZ_CHECK_FORMAT (r); |
| |
| if (mpz_cmp (f, r) != 0) |
| { |
| printf ("mpz_fac_ui(%lu) wrong\n", n); |
| printf (" got "); mpz_out_str (stdout, 10, r); printf("\n"); |
| printf (" want "); mpz_out_str (stdout, 10, f); printf("\n"); |
| abort (); |
| } |
| |
| mpz_mul_ui (f, f, n+1); /* (n+1)! = n! * n */ |
| } |
| |
| mpz_clear (f); |
| mpz_clear (r); |
| |
| tests_end (); |
| |
| exit (0); |
| } |