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/* Test file for mpfr_const_euler.
Copyright 2001, 2002, 2003, 2004, 2005 Free Software Foundation.
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"
int
main (int argc, char *argv[])
{
mpfr_t gamma, y, z, t;
unsigned int err, prec, yprec, p0 = 2, p1 = 200;
int rnd;
tests_start_mpfr ();
prec = (argc < 2) ? 53 : atoi(argv[1]);
if (argc > 1)
{
mpfr_init2 (gamma, prec);
mpfr_const_euler (gamma, GMP_RNDN);
printf("gamma="); mpfr_out_str (stdout, 10, 0, gamma, GMP_RNDD);
puts ("");
mpfr_clear (gamma);
return 0;
}
mpfr_init (y);
mpfr_init (z);
mpfr_init (t);
mpfr_set_prec (y, 32);
mpfr_set_prec (z, 32);
(mpfr_const_euler) (y, GMP_RNDN);
mpfr_set_str_binary (z, "0.10010011110001000110011111100011");
if (mpfr_cmp (y, z))
{
printf ("Error for prec=32\n");
exit (1);
}
for (prec = p0; prec <= p1; prec++)
{
mpfr_set_prec (z, prec);
mpfr_set_prec (t, prec);
yprec = prec + 10;
for (rnd = 0; rnd < GMP_RND_MAX; rnd++)
{
mpfr_set_prec (y, yprec);
mpfr_const_euler (y, (mp_rnd_t) rnd);
err = (rnd == GMP_RNDN) ? yprec + 1 : yprec;
if (mpfr_can_round (y, err, (mp_rnd_t) rnd, (mp_rnd_t) rnd, prec))
{
mpfr_set (t, y, (mp_rnd_t) rnd);
mpfr_const_euler (z, (mp_rnd_t) rnd);
if (mpfr_cmp (t, z))
{
printf ("results differ for prec=%u rnd_mode=%s\n", prec,
mpfr_print_rnd_mode ((mp_rnd_t) rnd));
printf (" got ");
mpfr_out_str (stdout, 2, prec, z, GMP_RNDN);
puts ("");
printf (" expected ");
mpfr_out_str (stdout, 2, prec, t, GMP_RNDN);
puts ("");
printf (" approximation was ");
mpfr_print_binary (y);
puts ("");
exit (1);
}
}
}
}
mpfr_clear (y);
mpfr_clear (z);
mpfr_clear (t);
tests_end_mpfr ();
return 0;
}
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