Add functions mpfr_sech, mpfr_coth and mpfr_csch.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@3526 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 38 insertions, 0 deletions

diff --git a/csch.c b/csch.c
new file mode 100644
index 000000000..6874d15c0
--- /dev/null
+++ b/csch.c
@@ -0,0 +1,38 @@
+/* mpfr_csch - Hyperbolic cosecant function.
+
+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 cosecant is defined by csch(x) = 1/sinh(x).
+   csc (NaN) = NaN.
+   csc (+Inf) = 0+.
+   csc (-Inf) = 0-.
+   csc (+0) = +Inf.
+   csc (-0) = -Inf.
+*/
+
+#define FUNCTION mpfr_csch
+#define INVERSE  mpfr_sinh
+#define ACTION_NAN(y) do { MPFR_SET_NAN(y); MPFR_RET_NAN; } while (1)
+#define ACTION_INF(y) do { MPFR_SET_SAME_SIGN(y,x); MPFR_SET_ZERO (y); \
+                           MPFR_RET(0); } while (1)
+#define ACTION_ZERO(y,x) do { MPFR_SET_SAME_SIGN(y,x); MPFR_SET_INF(y); \
+                              MPFR_RET(0); } while (1)
+
+#include "gen_inverse.h"