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Diffstat (limited to 'sech.c')
| -rw-r--r-- | sech.c | 34 |
1 files changed, 34 insertions, 0 deletions
@@ -0,0 +1,34 @@ +/* mpfr_sech - Hyperbolic secant function = 1/cosh. + +Copyright 2005 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., 59 Temple Place - Suite 330, Boston, +MA 02111-1307, USA. */ + +/* The hyperbolic secant function is defined by sech(x)=1/cosh(x): + csc (NaN) = NaN. + csc (+Inf) = csc (-Inf) = 0+. + csc (+0) = csc (-0) = 1. + */ + +#define FUNCTION mpfr_sech +#define INVERSE mpfr_cosh +#define ACTION_NAN(y) do { MPFR_SET_NAN(y); MPFR_RET_NAN; } while (1) +#define ACTION_INF(y) return mpfr_set_ui (y, 0, GMP_RNDN) +#define ACTION_ZERO(y,x) return mpfr_set_ui (y, 1, GMP_RNDN) + +#include "gen_inverse.h" |