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/* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_tdiv_r, mpz_add, mpz_cmp,
mpz_cmp_ui, mpz_init_set, mpz_set, mpz_clear.
Copyright (C) 1991, 1993, 1994, 1996 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 Library General Public License as published by
the Free Software Foundation; either version 2 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "urandom.h"
void mpz_refgcd (), debug_mp ();
#ifndef SIZE
#define SIZE 128
#endif
main (argc, argv)
int argc;
char **argv;
{
mpz_t op1, op2, x;
mpz_t refgcd, gcd, s, t;
mpz_t temp1, temp2;
mp_size_t op1_size, op2_size, x_size;
int i;
int reps = 1000;
if (argc == 2)
reps = atoi (argv[1]);
mpz_init (op1);
mpz_init (op2);
mpz_init (x);
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 - SIZE/2;
op2_size = urandom () % SIZE - SIZE/2;
x_size = urandom () % SIZE/2;
mpz_random2 (op1, op1_size);
mpz_random2 (op2, op2_size);
mpz_random2 (x, x_size);
mpz_mul (op1, op1, x);
mpz_mul (op2, op2, x);
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)
mpz_t g;
mpz_t x, y;
{
mpz_t 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_tdiv_r (xx, xx, yy);
if (mpz_cmp_ui (xx, 0) == 0)
{
mpz_set (g, yy);
break;
}
mpz_tdiv_r (yy, yy, xx);
}
mpz_clear (xx);
mpz_clear (yy);
}
dump_abort (op1, op2)
mpz_t 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)
mpz_t x;
{
mpz_out_str (stderr, base, x); fputc ('\n', stderr);
}
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