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- local serial = {}
- local local_pairs=function(tbl)
- local mt=getmetatable(tbl)
- return (mt and mt.__pairs or pairs)(tbl)
- end
- function serial.serialize(value,af) -- boolean -- string -- serialize *value* into a string. If *af* is true, allow functions. This breaks unserialization.
- local kw={["and"]=true,["break"]=true,["do"]=true,["else"]=true,["elseif"]=true,["end"]=true,["false"]=true,["for"]=true,["function"]=true,["goto"]=true,["if"]=true,["in"]=true,["local"]=true,["nil"]=true,["not"]=true,["or"]=true,["repeat"]=true,["return"]=true,["then"]=true,["true"]=true,["until"]=true,["while"]=true}
- local id="^[%a_][%w_]*$"
- local ts={}
- local function s(v,l)
- local t=type(v)
- if t=="nil" then return "nil"
- elseif t=="boolean" then return v and "true" or "false"
- elseif t=="number" then
- if v~=v then return "0/0"
- elseif v==math.huge then return "math.huge"
- elseif v==-math.huge then return "-math.huge"
- else return tostring(v) end
- elseif t=="string" then return string.format("%q",v):gsub("\\\n","\\n")
- elseif t=="table" then
- if ts[v] then error("tcyc") end
- ts[v]=true
- local i,r=1, nil
- local f=table.pack(local_pairs(v))
- for k,v in table.unpack(f) do
- if r then r=r..","..(("\n"..string.rep(" ",l)) or "")
- else r="{" end
- local tk=type(k)
- if tk=="number" and k==i then
- i=i+1
- r=r..s(v,l+1)
- else
- if tk == "string" and not kw[k] and string.match(k,id) then r=r..k
- else r=r.."["..s(k,l+1).."]" end
- r=r.."="..s(v,l+1) end end
- ts[v]=nil
- return (r or "{").."}"
- elseif t=="function" and af then
- return tostring(v)
- else error("ut "..t) end end
- return s(value, 1)
- end
- function serial.unserialize(data) -- string -- -- return *data*, but unserialized
- checkArg(1, data, "string")
- local result, reason = load("return " .. data, "=data", _, {math={huge=math.huge}})
- if not result then return nil, reason end
- local ok, output = pcall(result)
- if not ok then return nil, output end
- return output
- end
- return serial
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