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/* Test file for mpfr_csch.
Copyright 2005-2025 Free Software Foundation, Inc.
Contributed by the Pascaline and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU 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 3 of the License, or (at your
option) any later version.
The GNU 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 GNU MPFR Library; see the file COPYING.LESSER.
If not, see <https://www.gnu.org/licenses/>. */
#include "mpfr-test.h"
#define TEST_FUNCTION mpfr_csch
#define TEST_RANDOM_EMAX 63
#include "tgeneric.c"
static void
check_specials (void)
{
mpfr_t x, y;
mpfr_init2 (x, 123L);
mpfr_init2 (y, 123L);
mpfr_set_nan (x);
mpfr_csch (y, x, MPFR_RNDN);
if (! mpfr_nan_p (y))
{
printf ("Error: csch(NaN) != NaN\n");
exit (1);
}
mpfr_set_inf (x, 1);
mpfr_csch (y, x, MPFR_RNDN);
if (! (mpfr_zero_p (y) && MPFR_IS_POS (y)))
{
printf ("Error: csch(+Inf) != +0\n");
exit (1);
}
mpfr_set_inf (x, -1);
mpfr_csch (y, x, MPFR_RNDN);
if (! (mpfr_zero_p (y) && MPFR_IS_NEG (y)))
{
printf ("Error: csch(-0) != -0\n");
exit (1);
}
/* csc(+/-0) = +/-Inf */
mpfr_set_ui (x, 0, MPFR_RNDN);
mpfr_csch (y, x, MPFR_RNDN);
if (! (mpfr_inf_p (y) && mpfr_sgn (y) > 0))
{
printf ("Error: csch(+0) != +Inf\n");
exit (1);
}
mpfr_neg (x, x, MPFR_RNDN);
mpfr_csch (y, x, MPFR_RNDN);
if (! (mpfr_inf_p (y) && mpfr_sgn (y) < 0))
{
printf ("Error: csch(-0) != -Inf\n");
exit (1);
}
/* check huge x */
mpfr_set_str (x, "8e8", 10, MPFR_RNDN);
mpfr_csch (y, x, MPFR_RNDN);
if (! (mpfr_zero_p (y) && MPFR_IS_POS (y)))
{
printf ("Error: csch(8e8) != +0\n");
exit (1);
}
mpfr_set_str (x, "-8e8", 10, MPFR_RNDN);
mpfr_csch (y, x, MPFR_RNDN);
if (! (mpfr_zero_p (y) && MPFR_IS_NEG (y)))
{
printf ("Error: csch(-8e8) != -0\n");
exit (1);
}
mpfr_clear (x);
mpfr_clear (y);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
check_specials ();
test_generic (MPFR_PREC_MIN, 200, 10);
tests_end_mpfr ();
return 0;
}
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