1 files changed, 43 insertions, 17 deletions

diff --git a/mesecons_luacontroller/init.lua b/mesecons_luacontroller/init.lua
index 2166754..c8cb6ca 100644
--- a/mesecons_luacontroller/init.lua
+++ b/mesecons_luacontroller/init.lua
@@ -100,17 +100,17 @@ local heat = function (meta) -- warm up
 	end
 end
 
-local cool = function (meta) -- cool down after a while
-	h = meta:get_int("heat")
-	if h ~= nil then
-		meta:set_int("heat", h - 1)
-	end
-end
+--local cool = function (meta) -- cool down after a while
+--	h = meta:get_int("heat")
+--	if h ~= nil then
+--		meta:set_int("heat", h - 1)
+--	end
+--end
 
 local overheat = function (meta) -- determine if too hot
 	h = meta:get_int("heat")
 	if h == nil then return true end -- if nil then overheat
-	if h > 20 then 
+	if h > 40 then 
 		return true
 	else 
 		return false 
@@ -127,7 +127,7 @@ end
 
 local code_prohibited = function(code)
 	-- Clean code
-	local prohibited = {"while", "for", "repeat", "until", "function"}
+	local prohibited = {"while", "for", "repeat", "until", "function", "goto"}
 	for _, p in ipairs(prohibited) do
 		if string.find(code, p) then
 			return "Prohibited command: "..p
@@ -135,10 +135,34 @@ local code_prohibited = function(code)
 	end
 end
 
-local safeprint = function(param)
+local safe_print = function(param)
 	print(dump(param))
 end
 
+deep_copy = function(original, visited) --deep copy that removes functions
+	visited = visited or {}
+	if visited[original] ~= nil then --already visited this node
+		return visited[original]
+	end
+	if type(original) == 'table' then --nested table
+		local copy = {}
+		visited[original] = copy
+		for key, value in next, original, nil do
+			copy[deep_copy(key, visited)] = deep_copy(value, visited)
+		end
+		setmetatable(copy, deep_copy(getmetatable(original), visited))
+		return copy
+	elseif type(original) == 'function' then --ignore functions
+		return nil
+	else --by-value type
+		return original
+	end
+end
+
+local safe_serialize = function(value)
+	return minetest.serialize(deep_copy(value))
+end
+
 local interrupt = function(params)
 	lc_update(params.pos, {type="interrupt", iid = params.iid})
 end
@@ -150,15 +174,16 @@ local getinterrupt = function(pos)
 		local meta = minetest.env:get_meta(pos)
 		local interrupts = minetest.deserialize(meta:get_string("lc_interrupts")) or {}
 		local found = false
+		local search = safe_serialize(iid)
 		for _, i in ipairs(interrupts) do
-			if minetest.serialize(i) == minetest.serialize(iid) then
+			if safe_serialize(i) == search then
 				found = true
 				break
 			end
 		end
 		if not found then
 			table.insert(interrupts, iid)
-			meta:set_string("lc_interrupts", minetest.serialize(interrupts))
+			meta:set_string("lc_interrupts", safe_serialize(interrupts))
 		end
 		minetest.after(time, interrupt, {pos=pos, iid = iid})
 	end
@@ -181,7 +206,7 @@ local create_environment = function(pos, mem, event)
 	local rports = get_real_portstates(pos)
 
 	return {
-			print = safeprint,
+			print = safe_print,
 			pin = merge_portstates(vports, rports),
 			port = vports,
 			interrupt = getinterrupt(pos),
@@ -258,7 +283,7 @@ end
 local do_overheat = function (pos, meta)
 	-- Overheat protection
 	heat(meta)
-	minetest.after(0.5, cool, meta)
+	--minetest.after(0.5, cool, meta)
 	if overheat(meta) then
 		mesecon:swap_node(pos, BASENAME.."_burnt")
 		minetest.env:get_meta(pos):set_string("lc_interrupts", "")
@@ -272,15 +297,16 @@ local load_memory = function(meta)
 end
 
 local save_memory = function(meta, mem)
-	meta:set_string("lc_memory", minetest.serialize(mem))
+	meta:set_string("lc_memory", safe_serialize(mem))
 end
 
 local interrupt_allow = function (meta, event)
 	if event.type ~= "interrupt" then return true end
 
 	local interrupts = minetest.deserialize(meta:get_string("lc_interrupts")) or {}
+	local search = safe_serialize(event.iid)
 	for _, i in ipairs(interrupts) do
-		if minetest.serialize(i) == minetest.serialize(event.iid) then
+		if safe_serialize(i) == search then
 			return true
 		end
 	end
@@ -414,9 +440,9 @@ if d == 1 then
 end
 
 if a + b + c + d ~= 0 then
-	groups = {dig_immediate=2, not_in_creative_inventory=1}
+	groups = {dig_immediate=2, not_in_creative_inventory=1, overheat = 1}
 else
-	groups = {dig_immediate=2}
+	groups = {dig_immediate=2, overheat = 1}
 end
 
 output_rules[cid] = {}