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/* Test file for mpfr_get_f.
Copyright 2005 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 Place, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "mpfr-test.h"
int
main (void)
{
mpf_t x;
mpfr_t y;
unsigned long i;
MPFR_TEST_USE_RANDS ();
tests_start_mpfr ();
mpfr_init (y);
mpf_init (x);
mpfr_set_nan (y);
if (mpfr_get_f (x, y, GMP_RNDN) == 0)
{
printf ("Error: mpfr_get_f(NaN) should fail\n");
exit (1);
}
mpfr_set_inf (y, 1);
if (mpfr_get_f (x, y, GMP_RNDN) == 0)
{
printf ("Error: mpfr_get_f(+Inf) should fail\n");
exit (1);
}
mpfr_set_inf (y, -1);
if (mpfr_get_f (x, y, GMP_RNDN) == 0)
{
printf ("Error: mpfr_get_f(-Inf) should fail\n");
exit (1);
}
mpfr_set_ui (y, 0, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, 0))
{
printf ("Error: mpfr_get_f(+0) fails\n");
exit (1);
}
mpfr_set_ui (y, 0, GMP_RNDN);
mpfr_neg (y, y, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, 0))
{
printf ("Error: mpfr_get_f(-0) fails\n");
exit (1);
}
i = 1;
while (i)
{
mpfr_set_ui (y, i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, i))
{
printf ("Error: mpfr_get_f(%lu) fails\n", i);
exit (1);
}
mpfr_set_si (y, (signed long) -i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_si (x, (signed long) -i))
{
printf ("Error: mpfr_get_f(-%lu) fails\n", i);
exit (1);
}
i *= 2;
}
/* same tests, but with a larger precision for y, which requires to
round it */
mpfr_set_prec (y, 100);
i = 1;
while (i)
{
mpfr_set_ui (y, i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, i))
{
printf ("Error: mpfr_get_f(%lu) fails\n", i);
exit (1);
}
mpfr_set_si (y, (signed long) -i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_si (x, (signed long) -i))
{
printf ("Error: mpfr_get_f(-%lu) fails\n", i);
exit (1);
}
i *= 2;
}
mpfr_clear (y);
mpf_clear (x);
tests_end_mpfr ();
return 0;
}
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