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, 37 insertions, 0 deletions

diff --git a/coth.c b/coth.c
new file mode 100644
index 000000000..2b2f7ea45
--- /dev/null
+++ b/coth.c
@@ -0,0 +1,37 @@
+/* mpfr_coth - Hyperbolic cotangent 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 cotangent is defined by coth(x) = 1/tanh(x) 
+   coth (NaN) = NaN.
+   coth (+Inf) = 1
+   coth (-Inf) = -1
+   coth (+0) = +0.
+   coth (-0) = -0.
+*/
+
+#define FUNCTION mpfr_coth
+#define INVERSE  mpfr_tan
+#define ACTION_NAN(y) do { MPFR_SET_NAN(y); MPFR_RET_NAN; } while (1)
+#define ACTION_INF(y) return mpfr_set_si (y, MPFR_IS_POS(x) ? 1 : -1, GMP_RNDN)
+#define ACTION_ZERO(y,x) do { MPFR_SET_SAME_SIGN(y,x); MPFR_SET_ZERO(y); \
+                              MPFR_RET(0); } while (1)
+
+#include "gen_inverse.h"