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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);
}
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