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corrected spelling in the serialization lib oops

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Izaya 2019-11-09 16:00:49 +11:00
parent 80eea7142d
commit 37df78ffed
1 changed files with 45 additions and 141 deletions
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186
lib/serialization.lua
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@ -1,145 +1,49 @@
-- serialization lib borrowed from OpenOS
local serialization = {}
-- delay loaded tables fail to deserialize cross [C] boundaries (such as when having to read files that cause yields)
local local_pairs = function(tbl)
local mt = getmetatable(tbl)
return (mt and mt.__pairs or pairs)(tbl)
local serial = {}
local local_pairs=function(tbl)
local mt=getmetatable(tbl)
return (mt and mt.__pairs or pairs)(tbl)
end
-- Important: pretty formatting will allow presenting non-serializable values
-- but may generate output that cannot be unserialized back.
function serialization.serialize(value, pretty) -- serialize *value* into a string, optionally in a nicely formatted manner when *pretty* is set
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 result_pack = {}
local function recurse(current_value, depth)
local t = type(current_value)
if t == "number" then
if current_value ~= current_value then
table.insert(result_pack, "0/0")
elseif current_value == math.huge then
table.insert(result_pack, "math.huge")
elseif current_value == -math.huge then
table.insert(result_pack, "-math.huge")
else
table.insert(result_pack, tostring(current_value))
end
elseif t == "string" then
table.insert(result_pack, (string.format("%q", current_value):gsub("\\\n","\\n")))
elseif
t == "nil" or
t == "boolean" or
pretty and (t ~= "table" or (getmetatable(current_value) or {}).__tostring) then
table.insert(result_pack, tostring(current_value))
elseif t == "table" then
if ts[current_value] then
if pretty then
table.insert(result_pack, "recursion")
return
else
error("tables with cycles are not supported")
end
end
ts[current_value] = true
local f
if pretty then
local ks, sks, oks = {}, {}, {}
for k in local_pairs(current_value) do
if type(k) == "number" then
table.insert(ks, k)
elseif type(k) == "string" then
table.insert(sks, k)
else
table.insert(oks, k)
end
end
table.sort(ks)
table.sort(sks)
for _, k in ipairs(sks) do
table.insert(ks, k)
end
for _, k in ipairs(oks) do
table.insert(ks, k)
end
local n = 0
f = table.pack(function()
n = n + 1
local k = ks[n]
if k ~= nil then
return k, current_value[k]
else
return nil
end
end)
else
f = table.pack(local_pairs(current_value))
end
local i = 1
local first = true
table.insert(result_pack, "{")
for k, v in table.unpack(f) do
if not first then
table.insert(result_pack, ",")
if pretty then
table.insert(result_pack, "\n" .. string.rep(" ", depth))
end
end
first = nil
local tk = type(k)
if tk == "number" and k == i then
i = i + 1
recurse(v, depth + 1)
else
if tk == "string" and not kw[k] and string.match(k, id) then
table.insert(result_pack, k)
else
table.insert(result_pack, "[")
recurse(k, depth + 1)
table.insert(result_pack, "]")
end
table.insert(result_pack, "=")
recurse(v, depth + 1)
end
end
ts[current_value] = nil -- allow writing same table more than once
table.insert(result_pack, "}")
function serial.serialize(value)
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
error("unsupported type: " .. t)
end
end
recurse(value, 1)
local result = table.concat(result_pack)
if pretty then
local limit = type(pretty) == "number" and pretty or 10
local truncate = 0
while limit > 0 and truncate do
truncate = string.find(result, "\n", truncate + 1, true)
limit = limit - 1
end
if truncate then
return result:sub(1, truncate) .. "..."
end
end
return result
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 "{").."}"
else error("ut "..t) end end
return s(value, 1)
end
function serialization.unserialize(data) -- returns the data contained in serialized string *data*
local result, reason = load("return " .. data, "=data", nil, {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
function serial.unserialize(data)
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 serialization
return serial