Add hyperbolic functions: sinh, cosh, and others.

* arith.c (sinh_s, cosh_s, tanh_s, asinh_s, acosh_s, atanh_s):
New symbol variables.
(sinh, cosh, tanh, asinh, acosh, atanh): New static functions.
(sineh, cosih, tangh, asineh, acosih, atangh): New functions.
(arith_init): Register sinh, cosh, tanh, asinh, acosh and
atanh intrinsic functions, and initialize the new symbol
variables.

* configure: Detect availability of hyperbolic functions in
math library and defne HAVE_HYPERBOLICS as 1 in config.h
accordingly.

* lib.h (sineh, cosih, tangh, asineh, acosih, atangh):
Declared.

* txr.1: Documented new hyperbolic functions and their method
counterparts that a numeric struct can implement.

1 files changed, 22 insertions, 0 deletions

diff --git a/txr.1 b/txr.1
index 13f082f3..6d214246 100644
--- a/txr.1
+++ b/txr.1
@@ -38606,6 +38606,22 @@ and
 .meta y
 to an angle in polar coordinates in the range [0, 2\(*p).
 
+.coNP Functions @, sinh @, cosh @, tanh @, asinh @ acosh and @ atanh
+.synb
+.mets (sinh << argument )
+.mets (cosh << argument )
+.mets (tanh << argument )
+.mets (atanh << argument )
+.mets (asinh << argument )
+.mets (acosh << argument )
+.syne
+.desc
+These functions are the hyperbolic analogs of the trigonometric functions
+.codn sin ,
+.code cos
+and so forth. They convert their argument to floating point and
+return a float result.
+
 .coNP Functions @, exp @, log @ log10 and @ log2
 .synb
 .mets (exp << arg )
@@ -40635,6 +40651,12 @@ arguments must be integers.
 .um atan
 .bmnl atan2
 .bmnr r-atan2 atan2
+.um sinh
+.um cosh
+.um tanh
+.um asinh
+.um acosh
+.um atanh
 .um log
 .um log2
 .um log10