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/* Test file for mpfr_set_q.
Copyright 2000-2021 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 MPFR 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-test.h"
#ifndef MPFR_USE_MINI_GMP
static void
check (long int n, long int d, mpfr_rnd_t rnd, const char *ys)
{
mpq_t q;
mpfr_t x, t;
int inexact, compare;
mpfr_flags_t flags, ex_flags;
mpfr_init2 (x, 53);
mpfr_init2 (t, mpfr_get_prec (x) + mp_bits_per_limb);
mpq_init (q);
mpq_set_si (q, n, d);
mpfr_clear_flags ();
inexact = mpfr_set_q (x, q, rnd);
flags = __gmpfr_flags;
/* check values */
if (mpfr_cmp_str1 (x, ys))
{
printf ("Error for q = %ld/%ld and rnd = %s\n", n, d,
mpfr_print_rnd_mode (rnd));
printf ("correct result is %s, mpfr_set_q gives ", ys);
mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
putchar ('\n');
exit (1);
}
/* check inexact flag */
if (mpfr_mul_ui (t, x, (d < 0) ? (-d) : d, rnd))
{
printf ("t <- x * d should be exact\n");
exit (1);
}
compare = mpfr_cmp_si (t, n);
if (! SAME_SIGN (inexact, compare))
{
printf ("Wrong ternary value for q = %ld/%ld and rnd = %s:\n"
"expected %d or equivalent, got %d\n",
n, d, mpfr_print_rnd_mode (rnd), compare, inexact);
exit (1);
}
ex_flags = compare == 0 ? 0 : MPFR_FLAGS_INEXACT;
if (flags != ex_flags)
{
printf ("Wrong flags for q = %ld/%ld and rnd = %s:\n",
n, d, mpfr_print_rnd_mode (rnd));
printf ("Expected flags:");
flags_out (ex_flags);
printf ("Got flags: ");
flags_out (flags);
exit (1);
}
mpfr_clear (x);
mpfr_clear (t);
mpq_clear (q);
}
static void
check0 (void)
{
mpq_t y;
mpfr_t x;
int inexact;
int r;
/* Check for +0 */
mpfr_init (x);
mpq_init (y);
mpq_set_si (y, 0, 1);
RND_LOOP (r)
{
mpfr_clear_flags ();
inexact = mpfr_set_q (x, y, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact ||
__gmpfr_flags != 0)
{
printf("mpfr_set_q(x,0) failed for %s\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r));
exit(1);
}
}
mpfr_clear (x);
mpq_clear (y);
}
static void
check_nan_inf_mpq (void)
{
mpfr_t mpfr_value, mpfr_cmp;
mpq_t mpq_value;
int status;
mpfr_init2 (mpfr_value, MPFR_PREC_MIN);
mpq_init (mpq_value);
mpq_set_si (mpq_value, 0, 0);
mpz_set_si (mpq_denref (mpq_value), 0);
status = mpfr_set_q (mpfr_value, mpq_value, MPFR_RNDN);
if ((status != 0) || (!MPFR_IS_NAN (mpfr_value)))
{
mpfr_init2 (mpfr_cmp, MPFR_PREC_MIN);
mpfr_set_nan (mpfr_cmp);
printf ("mpfr_set_q with a NAN mpq value returned a wrong value :\n"
" expected ");
mpfr_dump (mpfr_cmp);
printf (" got ");
mpfr_dump (mpfr_value);
printf (" ternary value is %d\n", status);
exit (1);
}
mpq_set_si (mpq_value, -1, 0);
mpz_set_si (mpq_denref (mpq_value), 0);
status = mpfr_set_q (mpfr_value, mpq_value, MPFR_RNDN);
if ((status != 0) || (!MPFR_IS_INF (mpfr_value)) ||
(MPFR_SIGN(mpfr_value) != mpq_sgn(mpq_value)))
{
mpfr_init2 (mpfr_cmp, MPFR_PREC_MIN);
mpfr_set_inf (mpfr_cmp, -1);
printf ("mpfr_set_q with a -INF mpq value returned a wrong value :\n"
" expected ");
mpfr_dump (mpfr_cmp);
printf (" got ");
mpfr_dump (mpfr_value);
printf (" ternary value is %d\n", status);
exit (1);
}
mpq_clear (mpq_value);
mpfr_clear (mpfr_value);
}
int
main (void)
{
tests_start_mpfr ();
check(-1647229822, 40619231, MPFR_RNDZ, "-4.055295438754120596e1");
check(-148939696, 1673285490, MPFR_RNDZ, "-8.9010331404953485501e-2");
check(-441322590, 273662545, MPFR_RNDZ, "-1.6126525096812205362");
check(-1631156895, 1677687197, MPFR_RNDU, "-9.722652100563177191e-1");
check(2141332571, 3117601, MPFR_RNDZ, "6.8685267004982347316e2");
check(75504803, 400207282, MPFR_RNDU, "1.8866424074712365155e-1");
check(643562308, 23100894, MPFR_RNDD, "2.7858762002890447462e1");
check(632549085, 1831935802, MPFR_RNDN, "3.4528998467600230393e-1");
check (1, 1, MPFR_RNDN, "1.0");
check0();
check_nan_inf_mpq ();
tests_end_mpfr ();
return 0;
}
#else
int
main (void)
{
return 77;
}
#endif
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