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/* Test mpq_cmp_z.
Copyright 1996, 2001, 2015 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite 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 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite 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 test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "tests.h"
#define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0)
int
ref_mpq_cmp_z (mpq_t a, mpz_t b)
{
mpz_t bi;
int cc;
mpz_init (bi);
mpz_mul (bi, b, DEN (a));
cc = mpz_cmp (NUM (a), bi);
mpz_clear (bi);
return cc;
}
#ifndef SIZE
#define SIZE 8 /* increasing this lowers the probability of finding an error */
#endif
#ifndef MAXN
#define MAXN 5 /* increasing this impatcs on total timing */
#endif
void
sizes_test (int m)
{
mpq_t a;
mpz_t b;
int i, j, k, s;
int cc, ccref;
mpq_init (a);
mpz_init (b);
for (i = 0; i <= MAXN ; ++i)
{
mpz_setbit (DEN (a), i*m); /* \sum_0^i 2^(i*m) */
for (j = 0; j <= MAXN; ++j)
{
mpz_set_ui (NUM (a), 0);
mpz_setbit (NUM (a), j*m); /* 2^(j*m) */
for (k = 0; k <= MAXN; ++k)
{
mpz_set_ui (b, 0);
mpz_setbit (b, k*m); /* 2^(k*m) */
if (i == 0) /* Denominator is 1, compare the two exponents */
ccref = (j>k)-(j<k);
else
ccref = j-i > k ? 1 : -1;
for (s = 1; s >= -1; s -= 2)
{
cc = mpq_cmp_z (a, b);
if (ccref != SGN (cc))
{
fprintf (stderr, "i=%i, j=%i, k=%i, m=%i, s=%i\n; ccref= %i, cc= %i\n", i, j, k, m, s, ccref, cc);
abort ();
}
mpq_neg (a, a);
mpz_neg (b, b);
ccref = - ccref;
}
}
}
}
mpq_clear (a);
mpz_clear (b);
}
int
main (int argc, char **argv)
{
mpq_t a;
mpz_t b;
mp_size_t size;
int reps = 10000;
int i;
int cc, ccref;
tests_start ();
if (argc == 2)
reps = atoi (argv[1]);
mpq_init (a);
mpz_init (b);
for (i = 0; i < reps; i++)
{
if (i % 8192 == 0)
sizes_test (urandom () % (i + 1) + 1);
size = urandom () % SIZE - SIZE/2;
mpz_random2 (NUM (a), size);
do
{
size = urandom () % (SIZE/2);
mpz_random2 (DEN (a), size);
}
while (mpz_cmp_ui (DEN (a), 0) == 0);
size = urandom () % SIZE - SIZE/2;
mpz_random2 (b, size);
mpq_canonicalize (a);
ccref = ref_mpq_cmp_z (a, b);
cc = mpq_cmp_z (a, b);
if (SGN (ccref) != SGN (cc))
abort ();
}
mpq_clear (a);
mpz_clear (b);
tests_end ();
exit (0);
}
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