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- /* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_mod, mpz_add, mpz_cmp,
- mpz_cmp_ui. mpz_init_set, mpz_set, mpz_clear.
-
- Copyright (C) 1991, 1993 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 General Public License as published by
- the Free Software Foundation; either version 2, 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with the GNU MP Library; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdio.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "urandom.h"
-
- void mpz_refgcd (), debug_mp ();
-
- #ifndef SIZE
- #define SIZE 8
- #endif
-
- main (argc, argv)
- int argc;
- char **argv;
- {
- MP_INT op1, op2;
- MP_INT refgcd, gcd, s, t;
- MP_INT temp1, temp2;
- mp_size op1_size, op2_size;
- int i;
- int reps = 10000;
-
- if (argc == 2)
- reps = atoi (argv[1]);
-
- mpz_init (&op1);
- mpz_init (&op2);
- mpz_init (&refgcd);
- mpz_init (&gcd);
- mpz_init (&temp1);
- mpz_init (&temp2);
- mpz_init (&s);
- mpz_init (&t);
-
- for (i = 0; i < reps; i++)
- {
- op1_size = urandom () % SIZE;
- op2_size = urandom () % SIZE;
-
- mpz_random2 (&op1, op1_size);
- mpz_random2 (&op2, op2_size);
-
- mpz_refgcd (&refgcd, &op1, &op2);
-
- mpz_gcd (&gcd, &op1, &op2);
- if (mpz_cmp (&refgcd, &gcd))
- dump_abort (&op1, &op2);
-
- mpz_gcdext (&gcd, &s, &t, &op1, &op2);
- if (mpz_cmp (&refgcd, &gcd))
- dump_abort (&op1, &op2);
-
- mpz_mul (&temp1, &s, &op1);
- mpz_mul (&temp2, &t, &op2);
- mpz_add (&gcd, &temp1, &temp2);
- if (mpz_cmp (&refgcd, &gcd))
- dump_abort (&op1, &op2);
- }
-
- exit (0);
- }
-
- void
- mpz_refgcd (g, x, y)
- MP_INT *g;
- MP_INT *x, *y;
- {
- MP_INT xx, yy;
-
- mpz_init (&xx);
- mpz_init (&yy);
-
- mpz_abs (&xx, x);
- mpz_abs (&yy, y);
-
- for (;;)
- {
- if (mpz_cmp_ui (&yy, 0) == 0)
- {
- mpz_set (g, &xx);
- break;
- }
- mpz_mod (&xx, &xx, &yy);
- if (mpz_cmp_ui (&xx, 0) == 0)
- {
- mpz_set (g, &yy);
- break;
- }
- mpz_mod (&yy, &yy, &xx);
- }
-
- mpz_clear (&xx);
- mpz_clear (&yy);
- }
-
- dump_abort (op1, op2)
- MP_INT *op1, *op2;
- {
- fprintf (stderr, "ERROR\n");
- fprintf (stderr, "op1 = "); debug_mp (op1, -16);
- fprintf (stderr, "op2 = "); debug_mp (op2, -16);
- abort();
- }
-
- void
- debug_mp (x, base)
- MP_INT *x;
- {
- mpz_out_str (stderr, base, x); fputc ('\n', stderr);
- }
-