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/* Test file for mpfr_set_z.
Copyright 1999, 2001-2021 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"
static void check0(void)
{
mpz_t y;
mpfr_t x;
int inexact, r;
/* Check for +0 */
mpfr_init (x);
mpz_init (y);
mpz_set_si (y, 0);
RND_LOOP (r)
{
inexact = mpfr_set_z (x, y, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact)
{
printf("mpfr_set_z(x,0) failed for %s\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r));
exit(1);
}
}
mpfr_clear(x);
mpz_clear(y);
}
/* FIXME: It'd be better to examine the actual data in an mpfr_t to see that
it's as expected. Comparing mpfr_set_z with mpfr_cmp or against
mpfr_get_si is a rather indirect test of a low level routine. */
static void
check (long i, mpfr_rnd_t rnd)
{
mpfr_t f;
mpz_t z;
mpfr_init2 (f, 8 * sizeof(long));
mpz_init (z);
mpz_set_ui (z, i);
mpfr_set_z (f, z, rnd);
if (mpfr_get_si (f, MPFR_RNDZ) != i)
{
printf ("Error in mpfr_set_z for i=%ld rnd_mode=%d\n", i, rnd);
exit (1);
}
mpfr_clear (f);
mpz_clear (z);
}
static void
check_large (void)
{
mpz_t z;
mpfr_t x, y;
mpfr_exp_t emax, emin;
mpz_init (z);
mpfr_init2 (x, 160);
mpfr_init2 (y, 160);
mpz_set_str (z, "77031627725494291259359895954016675357279104942148788042", 10);
mpfr_set_z (x, z, MPFR_RNDN);
mpfr_set_str_binary (y, "0.1100100100001111110110101010001000100001011010001100001000110100110001001100011001100010100010111000000011011100000111001101000100101001000000100100111000001001E186");
if (mpfr_cmp (x, y))
{
printf ("Error in mpfr_set_z on large input\n");
exit (1);
}
/* check overflow */
emax = mpfr_get_emax ();
set_emax (2);
mpz_set_str (z, "7", 10);
mpfr_set_z (x, z, MPFR_RNDU);
MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
set_emax (3);
mpfr_set_prec (x, 2);
mpz_set_str (z, "7", 10);
mpfr_set_z (x, z, MPFR_RNDU);
MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
set_emax (emax);
/* check underflow */
emin = mpfr_get_emin ();
set_emin (3);
mpz_set_str (z, "1", 10);
mpfr_set_z (x, z, MPFR_RNDZ);
MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x));
set_emin (2);
mpfr_set_z (x, z, MPFR_RNDN);
MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x));
set_emin (emin);
mpz_clear (z);
mpfr_clear (x);
mpfr_clear (y);
}
int
main (int argc, char *argv[])
{
long j;
tests_start_mpfr ();
check_large ();
check (0, MPFR_RNDN);
for (j = 0; j < 200000; j++)
check (randlimb () & LONG_MAX, RND_RAND ());
check0 ();
tests_end_mpfr ();
return 0;
}
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