132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
/* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_mod, mpz_add, mpz_cmp,
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mpz_cmp_ui. mpz_init_set, mpz_set, mpz_clear.
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Copyright (C) 1991, 1993 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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The GNU MP Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU MP Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "urandom.h"
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void mpz_refgcd (), debug_mp ();
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#ifndef SIZE
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#define SIZE 8
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#endif
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main (argc, argv)
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int argc;
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char **argv;
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{
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MP_INT op1, op2;
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MP_INT refgcd, gcd, s, t;
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MP_INT temp1, temp2;
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mp_size op1_size, op2_size;
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int i;
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int reps = 10000;
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if (argc == 2)
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reps = atoi (argv[1]);
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mpz_init (&op1);
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mpz_init (&op2);
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mpz_init (&refgcd);
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mpz_init (&gcd);
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mpz_init (&temp1);
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mpz_init (&temp2);
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mpz_init (&s);
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mpz_init (&t);
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for (i = 0; i < reps; i++)
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{
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op1_size = urandom () % SIZE;
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op2_size = urandom () % SIZE;
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mpz_random2 (&op1, op1_size);
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mpz_random2 (&op2, op2_size);
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mpz_refgcd (&refgcd, &op1, &op2);
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mpz_gcd (&gcd, &op1, &op2);
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if (mpz_cmp (&refgcd, &gcd))
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dump_abort (&op1, &op2);
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mpz_gcdext (&gcd, &s, &t, &op1, &op2);
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if (mpz_cmp (&refgcd, &gcd))
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dump_abort (&op1, &op2);
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mpz_mul (&temp1, &s, &op1);
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mpz_mul (&temp2, &t, &op2);
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mpz_add (&gcd, &temp1, &temp2);
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if (mpz_cmp (&refgcd, &gcd))
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dump_abort (&op1, &op2);
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}
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exit (0);
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}
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void
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mpz_refgcd (g, x, y)
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MP_INT *g;
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MP_INT *x, *y;
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{
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MP_INT xx, yy;
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mpz_init (&xx);
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mpz_init (&yy);
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mpz_abs (&xx, x);
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mpz_abs (&yy, y);
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for (;;)
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{
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if (mpz_cmp_ui (&yy, 0) == 0)
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{
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mpz_set (g, &xx);
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break;
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}
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mpz_mod (&xx, &xx, &yy);
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if (mpz_cmp_ui (&xx, 0) == 0)
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{
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mpz_set (g, &yy);
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break;
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}
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mpz_mod (&yy, &yy, &xx);
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}
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mpz_clear (&xx);
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mpz_clear (&yy);
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}
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dump_abort (op1, op2)
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MP_INT *op1, *op2;
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{
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fprintf (stderr, "ERROR\n");
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fprintf (stderr, "op1 = "); debug_mp (op1, -16);
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fprintf (stderr, "op2 = "); debug_mp (op2, -16);
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abort();
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}
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void
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debug_mp (x, base)
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MP_INT *x;
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{
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mpz_out_str (stderr, base, x); fputc ('\n', stderr);
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}
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