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comparison lisp/prim/float-sup.el @ 2:ac2d302a0011 r19-15b2

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Import from CVS: tag r19-15b2
author cvs
date Mon, 13 Aug 2007 08:46:35 +0200
parents 376386a54a3c
children
comparison
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1:c0c6a60d29db 2:ac2d302a0011
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details. 18 ;; General Public License for more details.
19 19
20 ;; You should have received a copy of the GNU General Public License 20 ;; You should have received a copy of the GNU General Public License
21 ;; along with XEmacs; see the file COPYING. If not, write to the Free 21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
22 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
23 ;; 02111-1307, USA.
23 24
24 ;;; Synched up with: FSF 19.30. 25 ;;; Synched up with: FSF 19.34.
26
27 ;;; Code:
25 28
26 ;; Provide a meaningful error message if we are running on 29 ;; Provide a meaningful error message if we are running on
27 ;; bare (non-float) emacs. 30 ;; bare (non-float) emacs.
28 ;; Can't test for 'floatp since that may be defined by float-imitation 31 ;; Can't test for 'floatp since that may be defined by float-imitation
29 ;; packages like float.el in this very directory. 32 ;; packages like float.el in this very directory.
30 33
34 ;; XEmacs change
31 (or (featurep 'lisp-float-type) 35 (or (featurep 'lisp-float-type)
32 (error "Floating point was disabled at compile time")) 36 (error "Floating point was disabled at compile time"))
33 37
34 ;; define pi and e via math-lib calls. (much less prone to killer typos.) 38 ;; define pi and e via math-lib calls. (much less prone to killer typos.)
39 ;; XEmacs change (purecopy)
35 (defconst pi (purecopy (* 4 (atan 1))) "The value of Pi (3.1415926...)") 40 (defconst pi (purecopy (* 4 (atan 1))) "The value of Pi (3.1415926...)")
36 (defconst e (purecopy (exp 1)) "The value of e (2.7182818...)") 41 (defconst e (purecopy (exp 1)) "The value of e (2.7182818...)")
37 42
38 ;; Careful when editing this file ... typos here will be hard to spot. 43 ;; Careful when editing this file ... typos here will be hard to spot.
39 ;; (defconst pi 3.14159265358979323846264338327 44 ;; (defconst pi 3.14159265358979323846264338327
40 ;; "The value of Pi (3.14159265358979323846264338327...)") 45 ;; "The value of Pi (3.14159265358979323846264338327...)")
41 46
47 ;; XEmacs change (purecopy)
42 (defconst degrees-to-radians (purecopy (/ pi 180.0)) 48 (defconst degrees-to-radians (purecopy (/ pi 180.0))
43 "Degrees to radian conversion constant") 49 "Degrees to radian conversion constant")
44 (defconst radians-to-degrees (purecopy (/ 180.0 pi)) 50 (defconst radians-to-degrees (purecopy (/ 180.0 pi))
45 "Radian to degree conversion constant") 51 "Radian to degree conversion constant")
46 52
47 ;; these expand to a single multiply by a float 53 ;; these expand to a single multiply by a float when byte compiled
48 ;; when byte compiled
49 54
50 (defmacro degrees-to-radians (x) 55 (defmacro degrees-to-radians (x)
51 "Convert ARG from degrees to radians." 56 "Convert ARG from degrees to radians."
52 (list '* (/ pi 180.0) x)) 57 (list '* (/ pi 180.0) x))
53 (defmacro radians-to-degrees (x) 58 (defmacro radians-to-degrees (x)
54 "Convert ARG from radians to degrees." 59 "Convert ARG from radians to degrees."
55 (list '* (/ 180.0 pi) x)) 60 (list '* (/ 180.0 pi) x))
56 61
62 ;; Provided in C code in XEmacs
63 ;; (provide 'lisp-float-type)
64
57 ;;; float-sup.el ends here 65 ;;; float-sup.el ends here