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/* Test mpq_cmp.
Copyright (C) 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"
#define NUM(x) (&((x)->_mp_num))
#define DEN(x) (&((x)->_mp_den))
#define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
ref_mpq_cmp (a, b)
mpq_t a, b;
{
mpz_t ai, bi;
int cc;
mpz_init (ai);
mpz_init (bi);
mpz_mul (ai, NUM (a), DEN (b));
mpz_mul (bi, NUM (b), DEN (a));
cc = mpz_cmp (ai, bi);
mpz_clear (ai);
mpz_clear (bi);
return cc;
}
#ifndef SIZE
#define SIZE 8 /* increasing this lowers the probabilty of finding an error */
#endif
main (argc, argv)
int argc;
char **argv;
{
mpq_t a, b;
mp_size_t size;
int reps = 100000;
int i;
int cc, ccref;
if (argc == 2)
reps = atoi (argv[1]);
mpq_init (a);
mpq_init (b);
for (i = 0; i < reps; i++)
{
size = urandom () % SIZE - SIZE/2;
mpz_random2 (NUM (a), size);
do
{
size = urandom () % SIZE - SIZE/2;
mpz_random2 (DEN (a), size);
}
while (mpz_cmp_ui (DEN (a), 0) == 0);
size = urandom () % SIZE - SIZE/2;
mpz_random2 (NUM (b), size);
do
{
size = urandom () % SIZE - SIZE/2;
mpz_random2 (DEN (b), size);
}
while (mpz_cmp_ui (DEN (b), 0) == 0);
mpq_canonicalize (a);
mpq_canonicalize (b);
ccref = ref_mpq_cmp (a, b);
cc = mpq_cmp (a, b);
if (SGN (ccref) != SGN (cc))
abort ();
}
exit (0);
}
dump (x)
mpq_t x;
{
mpz_out_str (stdout, 10, NUM (x));
printf ("/");
mpz_out_str (stdout, 10, DEN (x));
printf ("\n");
}
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