blocky_portaling/mesecons
1
0
Fork 0
forked from Mirrorlandia_minetest/mesecons
Code Issues Pull Requests Projects Releases Wiki Activity

Support cyclic references in luacontroller memory tables, prohibit usage of goto statement (bugs reported by Nore).

Browse Source
This commit is contained in:
Anthony Zhang 2013-06-10 16:40:34 -04:00
parent 8ea71a9036
commit c87bc60635
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
mesecons_luacontroller/init.lua
View File

@ -127,7 +127,7 @@ end
local code_prohibited = function(code) local code_prohibited = function(code)
-- Clean code -- Clean code
local prohibited = {"while", "for", "repeat", "until", "function"} local prohibited = {"while", "for", "repeat", "until", "function", "goto"}
for _, p in ipairs(prohibited) do for _, p in ipairs(prohibited) do
if string.find(code, p) then if string.find(code, p) then
return "Prohibited command: "..p return "Prohibited command: "..p
@ -139,13 +139,18 @@ local safe_print = function(param)
print(dump(param)) print(dump(param))
end end
deep_copy = function(original) --deep copy that removes functions 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 if type(original) == 'table' then --nested table
local copy = {} local copy = {}
visited[original] = copy
for key, value in next, original, nil do for key, value in next, original, nil do
copy[deep_copy(key)] = deep_copy(value) copy[deep_copy(key, visited)] = deep_copy(value, visited)
end end
setmetatable(copy, deep_copy(getmetatable(original))) setmetatable(copy, deep_copy(getmetatable(original), visited))
return copy return copy
elseif type(original) == 'function' then --ignore functions elseif type(original) == 'function' then --ignore functions
return nil return nil