Rename to lualibs

Rename luaextra->lualibs when sensible, also use luatexbase instead of
luatextra.

1 files changed, 41 insertions, 0 deletions

diff --git a/lualibs-math.lua b/lualibs-math.lua
new file mode 100644
index 0000000..fc8db47
--- /dev/null
+++ b/lualibs-math.lua
@@ -0,0 +1,41 @@
+if not modules then modules = { } end modules ['l-math'] = {
+    version   = 1.001,
+    comment   = "companion to luat-lib.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local floor, sin, cos, tan = math.floor, math.sin, math.cos, math.tan
+
+if not math.round then
+    function math.round(x)
+        return floor(x + 0.5)
+    end
+end
+
+if not math.div then
+    function math.div(n,m)
+        return floor(n/m)
+    end
+end
+
+if not math.mod then
+    function math.mod(n,m)
+        return n % m
+    end
+end
+
+local pipi = 2*math.pi/360
+
+function math.sind(d)
+    return sin(d*pipi)
+end
+
+function math.cosd(d)
+    return cos(d*pipi)
+end
+
+function math.tand(d)
+    return tan(d*pipi)
+end