1/* Test file for mpfr_csc.
2
3Copyright 2005-2023 Free Software Foundation, Inc.
4Contributed by the AriC and Caramba projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include "mpfr-test.h"
24
25#define TEST_FUNCTION mpfr_csc
26#define REDUCE_EMAX 262143 /* otherwise arg. reduction is too expensive */
27#include "tgeneric.c"
28
29static void
30check_specials (void)
31{
32  mpfr_t  x, y;
33
34  mpfr_init2 (x, 123L);
35  mpfr_init2 (y, 123L);
36
37  mpfr_set_nan (x);
38  mpfr_csc (y, x, MPFR_RNDN);
39  if (! mpfr_nan_p (y))
40    {
41      printf ("Error: csc(NaN) != NaN\n");
42      exit (1);
43    }
44
45  mpfr_set_inf (x, 1);
46  mpfr_csc (y, x, MPFR_RNDN);
47  if (! mpfr_nan_p (y))
48    {
49      printf ("Error: csc(Inf) != NaN\n");
50      exit (1);
51    }
52
53  mpfr_set_inf (x, -1);
54  mpfr_csc (y, x, MPFR_RNDN);
55  if (! mpfr_nan_p (y))
56    {
57      printf ("Error: csc(-Inf) != NaN\n");
58      exit (1);
59    }
60
61  /* csc(+/-0) = +/-Inf */
62  mpfr_set_ui (x, 0, MPFR_RNDN);
63  mpfr_csc (y, x, MPFR_RNDN);
64  if (! (mpfr_inf_p (y) && mpfr_sgn (y) > 0))
65    {
66      printf ("Error: csc(+0) != +Inf\n");
67      exit (1);
68    }
69  mpfr_neg (x, x, MPFR_RNDN);
70  mpfr_csc (y, x, MPFR_RNDN);
71  if (! (mpfr_inf_p (y) && mpfr_sgn (y) < 0))
72    {
73      printf ("Error: csc(-0) != -Inf\n");
74      exit (1);
75    }
76
77  mpfr_clear (x);
78  mpfr_clear (y);
79}
80
81int
82main (int argc, char *argv[])
83{
84  tests_start_mpfr ();
85
86  check_specials ();
87
88  test_generic (MPFR_PREC_MIN, 100, 10);
89
90  tests_end_mpfr ();
91  return 0;
92}
93