-;; Basic editing commands for Emacs
+;;; float-sup.el --- detect absence of floating-point support in Emacs runtime
+
;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
+;; Maintainer: FSF
+
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 1, or (at your option)
+;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;;; Code:
+
;; Provide a meaningful error message if we are running on
;; bare (non-float) emacs.
;; Can't test for 'floatp since that may be defined by float-imitation
(error "Floating point was disabled at compile time"))
;; provide an easy hook to tell if we are running with floats or not.
-(provide 'lisp-float-type)
-
;; define pi and e via math-lib calls. (much less prone to killer typos.)
(defconst pi (* 4 (atan 1)) "The value of Pi (3.1415926...)")
(defconst e (exp 1) "The value of e (2.7182818...)")
(defconst radians-to-degrees (/ 180.0 pi)
"Radian to degree conversion constant")
-;; these expand to a single multiply by a float
-;; when byte compiled
+;; these expand to a single multiply by a float when byte compiled
(defmacro degrees-to-radians (x)
"Convert ARG from degrees to radians."
(defmacro radians-to-degrees (x)
"Convert ARG from radians to degrees."
(list '* (/ 180.0 pi) x))
+
+(provide 'lisp-float-type)
+
+;;; float-sup.el ends here