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/* Test file for mpfr_const_pi.
Copyright 1999, 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 "mpfr-test.h"
/* tconst_pi [prec] [rnd] [0 = no print] */
static void
check_large (void)
{
mpfr_t x, y, z;
mpfr_init2 (x, 20000);
mpfr_init2 (y, 21000);
mpfr_init2 (z, 11791);
/* The algo failed to round for p=11791. */
(mpfr_const_pi) (z, GMP_RNDU);
mpfr_const_pi (x, GMP_RNDN); /* First one ! */
mpfr_const_pi (y, GMP_RNDN); /* Then the other - cache - */
mpfr_prec_round (y, 20000, GMP_RNDN);
if (mpfr_cmp (x, y)) {
printf ("const_pi: error for large prec (%d)\n", 1);
exit (1);
}
mpfr_prec_round (y, 11791, GMP_RNDU);
if (mpfr_cmp (z, y)) {
printf ("const_pi: error for large prec (%d)\n", 2);
exit (1);
}
/* a worst-case to exercise recomputation */
if (MPFR_PREC_MAX > 33440) {
mpfr_set_prec (x, 33440);
mpfr_const_pi (x, GMP_RNDZ);
}
mpfr_clears (x, y, z, NULL);
}
int
main (int argc, char *argv[])
{
mpfr_t x;
mp_prec_t p;
mp_rnd_t rnd;
tests_start_mpfr ();
p = 53;
if (argc > 1)
{
long a = atol (argv[1]);
if (a >= MPFR_PREC_MIN && a <= MPFR_PREC_MAX)
p = a;
}
rnd = (argc > 2) ? (mp_rnd_t) atoi(argv[2]) : GMP_RNDZ;
mpfr_init2 (x, p);
mpfr_const_pi (x, rnd);
if (argc >= 2)
{
if (argc < 4 || atoi (argv[3]) != 0)
{
printf ("Pi=");
mpfr_out_str (stdout, 10, 0, x, rnd);
puts ("");
}
}
else if (mpfr_cmp_str1 (x, "3.141592653589793116") )
{
printf ("mpfr_const_pi failed for prec=53\n");
mpfr_out_str (stdout, 10, 0, x, GMP_RNDN); putchar('\n');
exit (1);
}
mpfr_set_prec (x, 32);
mpfr_const_pi (x, GMP_RNDN);
if (mpfr_cmp_str1 (x, "3.141592653468251") )
{
printf ("mpfr_const_pi failed for prec=32\n");
exit (1);
}
mpfr_clear (x);
check_large();
tests_end_mpfr ();
return 0;
}
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