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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
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/* Test file for mpfr_const_euler.
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Copyright 2001-2018 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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/* Wrapper for tgeneric */
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static int
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my_const_euler (mpfr_ptr x, mpfr_srcptr y, mpfr_rnd_t r)
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{
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return mpfr_const_euler (x, r);
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}
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#define RAND_FUNCTION(x) mpfr_set_ui ((x), 0, MPFR_RNDN)
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#define TEST_FUNCTION my_const_euler
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#include "tgeneric.c"
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int
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main (int argc, char *argv[])
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{
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mpfr_t gamma, y, z, t;
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unsigned int err, prec, yprec, p0 = 2, p1 = 200;
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int rnd;
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tests_start_mpfr ();
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prec = (argc < 2) ? 53 : atoi(argv[1]);
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if (argc > 1)
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{
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mpfr_init2 (gamma, prec);
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mpfr_const_euler (gamma, MPFR_RNDN);
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printf("gamma="); mpfr_out_str (stdout, 10, 0, gamma, MPFR_RNDD);
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puts ("");
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mpfr_clear (gamma);
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return 0;
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}
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mpfr_init (y);
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mpfr_init (z);
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mpfr_init (t);
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mpfr_set_prec (y, 32);
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mpfr_set_prec (z, 32);
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(mpfr_const_euler) (y, MPFR_RNDN);
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mpfr_set_str_binary (z, "0.10010011110001000110011111100011");
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if (mpfr_cmp (y, z))
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{
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printf ("Error for prec=32\n");
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exit (1);
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}
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for (prec = p0; prec <= p1; prec++)
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{
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mpfr_set_prec (z, prec);
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mpfr_set_prec (t, prec);
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yprec = prec + 10;
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RND_LOOP_NO_RNDF (rnd)
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{
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mpfr_set_prec (y, yprec);
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mpfr_const_euler (y, (mpfr_rnd_t) rnd);
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err = (rnd == MPFR_RNDN) ? yprec + 1 : yprec;
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/* Note: for rnd = RNDF, rnd1 = RNDF is equivalent to rnd1 = RNDN
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in mpfr_can_round, thus rnd2 = RNDF reduces to rnd2 = RNDN in that
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case, we are duplicating the test for rnd = RNDN. */
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if (mpfr_can_round (y, err, (mpfr_rnd_t) rnd, (mpfr_rnd_t) rnd, prec))
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{
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mpfr_set (t, y, (mpfr_rnd_t) rnd);
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mpfr_const_euler (z, (mpfr_rnd_t) rnd);
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if (mpfr_cmp (t, z))
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{
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printf ("results differ for prec=%u rnd_mode=%s\n", prec,
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mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
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printf (" got ");
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mpfr_out_str (stdout, 2, prec, z, MPFR_RNDN);
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puts ("");
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printf (" expected ");
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mpfr_out_str (stdout, 2, prec, t, MPFR_RNDN);
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puts ("");
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printf (" approximation was ");
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mpfr_dump (y);
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exit (1);
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}
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}
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}
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}
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mpfr_clear (y);
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mpfr_clear (z);
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mpfr_clear (t);
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test_generic (MPFR_PREC_MIN, 200, 1);
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tests_end_mpfr ();
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return 0;
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}
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