From 077cdaa2a4f40a589fbee300783785901d9fffab Mon Sep 17 00:00:00 2001
From: Lejo1 <Lejo_1@web.de>
Date: Mon, 30 Mar 2020 13:05:25 +0200
Subject: [PATCH 1/2] Add all usefull helper function from lua_api.txt

---
 mesecons_luacontroller/init.lua | 38 ++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/mesecons_luacontroller/init.lua b/mesecons_luacontroller/init.lua
index 1c93e48..08e4be5 100644
--- a/mesecons_luacontroller/init.lua
+++ b/mesecons_luacontroller/init.lua
@@ -231,6 +231,16 @@ local function safe_string_find(...)
 	return string.find(...)
 end
 
+-- do not allow pattern matching in string.split (see string.find for details)
+local function safe_string_split(...)
+	if select(5, ...) then
+		debug.sethook() -- Clear hook
+		error("string.split: 'sep_is_pattern' (fifth parameter) may not be used in a Luacontroller")
+	end
+
+	return string.split(...)
+end
+
 local function remove_functions(x)
 	local tp = type(x)
 	if tp == "function" then
@@ -463,6 +473,7 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 			reverse = string.reverse,
 			sub = string.sub,
 			find = safe_string_find,
+			split = safe_string_split,
 		},
 		math = {
 			abs = math.abs,
@@ -475,10 +486,12 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 			cosh = math.cosh,
 			deg = math.deg,
 			exp = math.exp,
+			factorial = math.factorial,
 			floor = math.floor,
 			fmod = math.fmod,
 			frexp = math.frexp,
 			huge = math.huge,
+			hypot = math.hypot,
 			ldexp = math.ldexp,
 			log = math.log,
 			log10 = math.log10,
@@ -490,6 +503,7 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 			rad = math.rad,
 			random = math.random,
 			sin = math.sin,
+			sing = math.sign,
 			sinh = math.sinh,
 			sqrt = math.sqrt,
 			tan = math.tan,
@@ -497,9 +511,14 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 		},
 		table = {
 			concat = table.concat,
+			copy = table.copy,
+			indexof = table.indexof,
 			insert = table.insert,
+			insert_all = table.insert_all,
+			key_value_swap = table.key_value_swap,
 			maxn = table.maxn,
 			remove = table.remove,
+			shuffle = table.shuffle,
 			sort = table.sort,
 		},
 		os = {
@@ -508,6 +527,24 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 			time = os.time,
 			datetable = safe_date,
 		},
+		dump2 = dump2,
+		dump = dump,
+		minetest = {
+			wrap_text = minetest.wrap_text,
+			pos_to_string = minetest.pos_to_string,
+			string_to_pos = minetest.string_to_pos,
+			string_to_area = minetest.string_to_area,
+			formspec_escape = minetest.formspec_escape,
+			is_yes = minetest.is_yes,
+			is_nan = minetest.is_nan,
+			get_us_time = minetest.get_us_time,
+			parse_json = minetest.parse_json,
+			write_json = minetest.write_json,
+			rgba = minetest.rgba,
+			encode_base64 = minetest.encode_base64,
+			decode_base64 = minetest.decode_base64,
+		},
+		vector = vector,
 	}
 	env._G = env
 
@@ -901,4 +938,3 @@ minetest.register_craft({
 		{'group:mesecon_conductor_craftable', 'group:mesecon_conductor_craftable', ''},
 	}
 })
-

From a19ef422ea92558b41587a59a75a78e387eee665 Mon Sep 17 00:00:00 2001
From: Lejo1 <Lejo_1@web.de>
Date: Mon, 30 Mar 2020 14:22:57 +0200
Subject: [PATCH 2/2] Use table.copy instead of each separate function

---
 mesecons_luacontroller/init.lua | 52 +++------------------------------
 1 file changed, 4 insertions(+), 48 deletions(-)

diff --git a/mesecons_luacontroller/init.lua b/mesecons_luacontroller/init.lua
index 08e4be5..bf1d552 100644
--- a/mesecons_luacontroller/init.lua
+++ b/mesecons_luacontroller/init.lua
@@ -475,52 +475,8 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 			find = safe_string_find,
 			split = safe_string_split,
 		},
-		math = {
-			abs = math.abs,
-			acos = math.acos,
-			asin = math.asin,
-			atan = math.atan,
-			atan2 = math.atan2,
-			ceil = math.ceil,
-			cos = math.cos,
-			cosh = math.cosh,
-			deg = math.deg,
-			exp = math.exp,
-			factorial = math.factorial,
-			floor = math.floor,
-			fmod = math.fmod,
-			frexp = math.frexp,
-			huge = math.huge,
-			hypot = math.hypot,
-			ldexp = math.ldexp,
-			log = math.log,
-			log10 = math.log10,
-			max = math.max,
-			min = math.min,
-			modf = math.modf,
-			pi = math.pi,
-			pow = math.pow,
-			rad = math.rad,
-			random = math.random,
-			sin = math.sin,
-			sing = math.sign,
-			sinh = math.sinh,
-			sqrt = math.sqrt,
-			tan = math.tan,
-			tanh = math.tanh,
-		},
-		table = {
-			concat = table.concat,
-			copy = table.copy,
-			indexof = table.indexof,
-			insert = table.insert,
-			insert_all = table.insert_all,
-			key_value_swap = table.key_value_swap,
-			maxn = table.maxn,
-			remove = table.remove,
-			shuffle = table.shuffle,
-			sort = table.sort,
-		},
+		math = table.copy(math),
+		table = table.copy(table),
 		os = {
 			clock = os.clock,
 			difftime = os.difftime,
@@ -530,7 +486,7 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 		dump2 = dump2,
 		dump = dump,
 		minetest = {
-			wrap_text = minetest.wrap_text,
+			--wrap_text = minetest.wrap_text,
 			pos_to_string = minetest.pos_to_string,
 			string_to_pos = minetest.string_to_pos,
 			string_to_area = minetest.string_to_area,
@@ -544,7 +500,7 @@ local function create_environment(pos, mem, event, itbl, send_warning)
 			encode_base64 = minetest.encode_base64,
 			decode_base64 = minetest.decode_base64,
 		},
-		vector = vector,
+		vector = table.copy(vector),
 	}
 	env._G = env