X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=gacela_misc.lisp;h=ac7b479db805ded3532e7725e0cc4bd87168a74e;hb=a559c9a47d17f1a7ca0a4dff3edcd39449d1821e;hp=6ebcf38ddde8e1e299c8cd68c335a22df38f17d0;hpb=678a1561ca858c34fecf04792831caf68559c2ac;p=gacela.git

diff --git a/gacela_misc.lisp b/gacela_misc.lisp
index 6ebcf38..ac7b479 100755
--- a/gacela_misc.lisp
+++ b/gacela_misc.lisp
@@ -63,6 +63,20 @@
 	 (cond ((or (numberp list) (numberp pattern)) (and (numberp list) (numberp pattern)))
 	       (t t)))))
 
+(defun nearest-power-of-two (n)
+  (labels ((power (p n)
+		  (cond ((> (* p 2) n) p)
+			(t (power (* p 2) n)))))
+	  (power 1 n)))
+
+(defmacro mapcconst (type c-type name)
+  `(progn
+     (defcfun ,(concatenate 'string c-type " gacela_" name " (void)") 0
+       ,(concatenate 'string "return " name ";"))
+     (defentry ,(intern (string-upcase name)) ()
+       (,type ,(concatenate 'string "gacela_" name)))))
+
+
 ;Geometry
 (defun dotp (dot)
   (match-pattern dot '(0 0)))