Fix some incompatibility crash for old worlds - advtrains.git

path: root/advtrains_train_subway/init.lua

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author	orwell96 <orwell@bleipb.de>	2018-07-17 21:15:34 +0200
committer	orwell96 <orwell@bleipb.de>	2018-08-12 17:56:02 +0200
commit	b80ba056d9ba993109ceae11eac403139afec39f (patch)
tree	acee65ed6fac8a18716b31406e1056dfe7d4f5ac /advtrains_train_subway/init.lua
parent	6d7d9d018161c5e14cfa0992bc3361e5df071c6f (diff)
download	advtrains-b80ba056d9ba993109ceae11eac403139afec39f.tar.gz advtrains-b80ba056d9ba993109ceae11eac403139afec39f.tar.bz2 advtrains-b80ba056d9ba993109ceae11eac403139afec39f.zip

Fix some incompatibility crash for old worlds

Diffstat (limited to 'advtrains_train_subway/init.lua')

0 files changed, 0 insertions, 0 deletions

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-------------
-- lua sandboxed environment

-- function to cross out functions and userdata.
-- modified from dump()
function atlatc.remove_invalid_data(o, nested)
	if o==nil then return nil end
	local valid_dt={["nil"]=true, boolean=true, number=true, string=true}
	if type(o) ~= "table" then
		--check valid data type
		if not valid_dt[type(o)] then
			return nil
		end
		return o
	end
	-- Contains table -> true/nil of currently nested tables
	nested = nested or {}
	if nested[o] then
		return nil
	end
	nested[o] = true
	for k, v in pairs(o) do
		v = atlatc.remove_invalid_data(v, nested)
	end
	nested[o] = nil
	return o
end


local env_proto={
	load = function(self, envname, data)
		self.name=envname
		self.sdata=data.sdata and atlatc.remove_invalid_data(data.sdata) or {}
		self.fdata={}
		self.init_code=data.init_code or ""


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