133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
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/* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_tdiv_r, 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, 1994, 1996 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 Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, 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 256 /* really needs to be this large to exercise corner cases! */
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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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mpz_t op1, op2;
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mpz_t refgcd, gcd, s, t;
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mpz_t temp1, temp2;
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mp_size_t op1_size, op2_size;
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int i;
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int reps = 1000;
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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 - SIZE/2;
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op2_size = urandom () % SIZE - SIZE/2;
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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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mpz_t g;
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mpz_t x, y;
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{
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mpz_t 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_tdiv_r (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_tdiv_r (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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mpz_t 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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mpz_t 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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