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/* Test file for mpfr_eint.
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 "mpfr-test.h"
#define TEST_FUNCTION mpfr_eint
#include "tgeneric.c"
static void
check_specials (void)
{
mpfr_t x, y;
mpfr_init2 (x, 123L);
mpfr_init2 (y, 123L);
mpfr_set_nan (x);
mpfr_eint (y, x, GMP_RNDN);
if (! mpfr_nan_p (y))
{
printf ("Error: eint(NaN) != NaN\n");
exit (1);
}
mpfr_set_inf (x, 1);
mpfr_eint (y, x, GMP_RNDN);
if (! (mpfr_inf_p (y) && mpfr_sgn (y) > 0))
{
printf ("Error: eint(+Inf) != +Inf\n");
exit (1);
}
mpfr_set_inf (x, -1);
mpfr_eint (y, x, GMP_RNDN);
if (! mpfr_nan_p (y))
{
printf ("Error: eint(-Inf) != NaN\n");
exit (1);
}
/* eint(+/-0) = -Inf */
mpfr_set_ui (x, 0, GMP_RNDN);
mpfr_eint (y, x, GMP_RNDN);
if (! (mpfr_inf_p (y) && mpfr_sgn (y) < 0))
{
printf ("Error: eint(+0) != -Inf\n");
exit (1);
}
mpfr_neg (x, x, GMP_RNDN);
mpfr_eint (y, x, GMP_RNDN);
if (! (mpfr_inf_p (y) && mpfr_sgn (y) < 0))
{
printf ("Error: eint(-0) != -Inf\n");
exit (1);
}
/* eint(x) = NaN for x < 0 */
mpfr_set_si (x, -1, GMP_RNDN);
mpfr_eint (y, x, GMP_RNDN);
if (! mpfr_nan_p (y))
{
printf ("Error: eint(-1) != NaN\n");
exit (1);
}
mpfr_set_prec (x, 17);
mpfr_set_prec (y, 17);
mpfr_set_str_binary (x, "1.0111110100100110e-2");
mpfr_set_str_binary (y, "-1.0010101001110100e-10");
mpfr_eint (x, x, GMP_RNDZ);
if (mpfr_cmp (x, y))
{
printf ("Error for x=1.0111110100100110e-2, GMP_RNDZ\n");
printf ("expected "); mpfr_dump (y);
printf ("got "); mpfr_dump (x);
exit (1);
}
mpfr_clear (x);
mpfr_clear (y);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
if (argc != 1) /* teint x [prec] */
{
mpfr_t x;
mp_prec_t p;
p = (argc < 3) ? 53 : atoi (argv[2]);
mpfr_init2 (x, p);
mpfr_set_str (x, argv[1], 10, GMP_RNDN);
printf ("eint(");
mpfr_out_str (stdout, 10, 0, x, GMP_RNDN);
printf (")=");
mpfr_eint (x, x, GMP_RNDN);
mpfr_out_str (stdout, 10, 0, x, GMP_RNDN);
printf ("\n");
mpfr_clear (x);
}
else
{
check_specials ();
test_generic (2, 100, 100);
}
tests_end_mpfr ();
return 0;
}
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