Improve the LuaController

Changes:
  * Stops code after a certain number of instructions.
  * Allows functions, due to instruction counting.
  * Allows loops and goto with non-JIT Lua (LuaJIT doesn't count looping as an instruction, allowing infinite loops), due to instruction counting.
  * Removes string matching functions as they can be slow.
  * Adds some safe functions.
  * Limits the amount of printing that can be done (to prevent console flooding).
  * Code cleanup.
  * More...

1 files changed, 15 insertions, 15 deletions

diff --git a/mesecons/legacy.lua b/mesecons/legacy.lua
index c4334cf..119fa24 100644
--- a/mesecons/legacy.lua
+++ b/mesecons/legacy.lua
@@ -1,18 +1,13 @@
-minetest.swap_node = minetest.swap_node or function(pos, node)

-	local data = minetest.get_meta(pos):to_table()

-	minetest.add_node(pos, node)

-	minetest.get_meta(pos):from_table(data)

-end

-

-local rules = {}

-rules.a = {x = -1, y = 0, z =  0, name="A"}

-rules.b = {x =  0, y = 0, z =  1, name="B"}

-rules.c = {x =  1, y = 0, z =  0, name="C"}

-rules.d = {x =  0, y = 0, z = -1, name="D"}

+local rules = {

+	a = {x = -1, y = 0, z =  0, name="A"},

+	b = {x =  0, y = 0, z =  1, name="B"},

+	c = {x =  1, y = 0, z =  0, name="C"},

+	d = {x =  0, y = 0, z = -1, name="D"},

+}

 

-function legacy_update_ports(pos)

+function mesecon.legacy_update_ports(pos)

 	local meta = minetest.get_meta(pos)

-	L = {

+	local ports = {

 		a = mesecon:is_power_on(mesecon:addPosRule(pos, rules.a),

 			mesecon:invertRule(rules.a)) and

 			mesecon:rules_link(mesecon:addPosRule(pos, rules.a), pos),

@@ -26,7 +21,12 @@ function legacy_update_ports(pos)
 			mesecon:invertRule(rules.d)) and

 			mesecon:rules_link(mesecon:addPosRule(pos, rules.d), pos),

 	}

-	local n = (L.a and 1 or 0) + (L.b and 2 or 0) + (L.c and 4 or 0) + (L.d and 8 or 0) + 1

+	local n =

+		(ports.a and 1 or 0) +

+		(ports.b and 2 or 0) +

+		(ports.c and 4 or 0) +

+		(ports.d and 8 or 0) + 1

 	meta:set_int("real_portstates", n)

-	return L

+	return ports

 end

+