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974e12c1f0
Old version was 3.1.2 and is quite old: 2013-03-13 A lot has happened since then 4.0.1 is from 2018-02-07
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/* Test file for mpfr_erandom
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Copyright 2011-2018 Free Software Foundation, Inc.
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Contributed by the AriC and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
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http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "mpfr-test.h"
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static void
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test_special (mpfr_prec_t p)
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{
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mpfr_t x;
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int inexact;
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mpfr_init2 (x, p);
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inexact = mpfr_erandom (x, RANDS, MPFR_RNDN);
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if (inexact == 0)
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{
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printf ("Error: mpfr_erandom() returns a zero ternary value.\n");
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exit (1);
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}
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mpfr_clear(x);
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}
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static void
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test_erandom (long nbtests, mpfr_prec_t prec, mpfr_rnd_t rnd,
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int verbose)
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{
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mpfr_t *t;
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int i, inexact;
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t = (mpfr_t *) tests_allocate (nbtests * sizeof (mpfr_t));
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for (i = 0; i < nbtests; ++i)
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mpfr_init2 (t[i], prec);
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for (i = 0; i < nbtests; i++)
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{
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inexact = mpfr_erandom (t[i], RANDS, MPFR_RNDN);
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if (inexact == 0)
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{
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/* one call in the loop pretended to return an exact number! */
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printf ("Error: mpfr_erandom() returns a zero ternary value.\n");
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exit (1);
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}
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}
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#if defined(HAVE_STDARG) && !defined(MPFR_USE_MINI_GMP)
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if (verbose)
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{
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mpfr_t av, va, tmp;
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mpfr_init2 (av, prec);
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mpfr_init2 (va, prec);
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mpfr_init2 (tmp, prec);
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mpfr_set_ui (av, 0, MPFR_RNDN);
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mpfr_set_ui (va, 0, MPFR_RNDN);
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for (i = 0; i < nbtests; ++i)
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{
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mpfr_add (av, av, t[i], MPFR_RNDN);
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mpfr_sqr (tmp, t[i], MPFR_RNDN);
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mpfr_add (va, va, tmp, MPFR_RNDN);
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}
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mpfr_div_ui (av, av, nbtests, MPFR_RNDN);
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mpfr_div_ui (va, va, nbtests, MPFR_RNDN);
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mpfr_sqr (tmp, av, MPFR_RNDN);
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mpfr_sub (va, va, av, MPFR_RNDN);
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mpfr_printf ("Average = %.5Rf\nVariance = %.5Rf\n", av, va);
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mpfr_clear (av);
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mpfr_clear (va);
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mpfr_clear (tmp);
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}
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#endif /* HAVE_STDARG */
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for (i = 0; i < nbtests; ++i)
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mpfr_clear (t[i]);
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tests_free (t, nbtests * sizeof (mpfr_t));
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return;
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}
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int
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main (int argc, char *argv[])
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{
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long nbtests;
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int verbose;
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tests_start_mpfr ();
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verbose = 0;
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nbtests = 10;
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if (argc > 1)
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{
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long a = atol (argv[1]);
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verbose = 1;
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if (a != 0)
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nbtests = a;
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}
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test_erandom (nbtests, 420, MPFR_RNDN, verbose);
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test_special (2);
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test_special (42000);
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tests_end_mpfr ();
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return 0;
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}
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