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/* Test file for mpfr_set_q.
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The 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 2.1 of the License, or (at your
option) any later version.
The 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 MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "mpfr-test.h"
static void
check (long int n, long int d, mp_rnd_t rnd, const char *ys)
{
mpq_t q;
mpfr_t x, t;
int inexact, compare;
mpfr_init2 (x, 53);
mpfr_init2 (t, mpfr_get_prec (x) + mp_bits_per_limb);
mpq_init (q);
mpq_set_si (q, n, d);
inexact = mpfr_set_q (x, q, rnd);
/* 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, GMP_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 (((inexact == 0) && (compare != 0)) ||
((inexact < 0) && (compare >= 0)) ||
((inexact > 0) && (compare <= 0)))
{
printf ("wrong inexact flag: expected %d, got %d\n", compare,
inexact);
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);
for (r = 0; r < GMP_RND_MAX; r++)
{
inexact = mpfr_set_q(x, y, (mp_rnd_t) r);
if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact)
{
printf("mpfr_set_q(x,0) failed for %s\n",
mpfr_print_rnd_mode ((mp_rnd_t) r));
exit(1);
}
}
mpfr_clear (x);
mpq_clear (y);
}
int
main (void)
{
tests_start_mpfr ();
check(-1647229822, 40619231, GMP_RNDZ, "-4.055295438754120596e1");
check(-148939696, 1673285490, GMP_RNDZ, "-8.9010331404953485501e-2");
check(-441322590, 273662545, GMP_RNDZ, "-1.6126525096812205362");
check(-1631156895, 1677687197, GMP_RNDU, "-9.722652100563177191e-1");
check(2141332571, 3117601, GMP_RNDZ, "6.8685267004982347316e2");
check(75504803, 400207282, GMP_RNDU, "1.8866424074712365155e-1");
check(643562308, 23100894, GMP_RNDD, "2.7858762002890447462e1");
check(632549085, 1831935802, GMP_RNDN, "3.4528998467600230393e-1");
check (1, 1, GMP_RNDN, "1.0");
check0();
tests_end_mpfr ();
return 0;
}
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