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Update json.lua #6

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Merged
merged 1 commit into from
Nov 20, 2022
Merged

Update json.lua #6

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78 changes: 41 additions & 37 deletions json.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@ local function encode_nil(val)
return "null"
end

local json_object_tag = {}

local function encode_table(val, stack)
local res = {}
Expand All @@ -64,47 +65,50 @@ local function encode_table(val, stack)
if stack[val] then error("circular reference") end

stack[val] = true
-- Check whether to treat as a array or object
local array = true
local length = 0
local nLen = 0
for k,v in pairs(val) do
if (type(k) ~= "number" or k<=0) and not (k == "n" and type(v) == "number") then
array = nil
break -- Treat as object
else
if k > length then
length = k
end
if k == "n" and type(v) == "number" then
nLen = v
end
end
end

if array then
if nLen > length then
length = nLen
end
-- Encode
for i=1,length do
table.insert(res, encode(val[i], stack))
if getmetatable(val) ~= json_object_tag and (rawget(val, 1) ~= nil or next(val) == nil) then
-- Check whether to treat as a array or object
local array = true
local length = 0
local nLen = 0
for k,v in pairs(val) do
if (type(k) ~= "number" or k<=0) and not (k == "n" and type(v) == "number") then
array = nil
break -- Treat as object
else
if k > length then
length = k
end
if k == "n" and type(v) == "number" then
nLen = v
end
end
end
stack[val] = nil
return "[" .. table.concat(res, ",") .. "]"

else
-- Treat as an object
for k, v in pairs(val) do
--[[
if type(k) ~= "string" then
error("invalid table: mixed or invalid key types")
if array then
if nLen > length then
length = nLen
end
-- Encode
for i=1,length do
table.insert(res, encode(val[i], stack))
end
stack[val] = nil
return "[" .. table.concat(res, ",") .. "]"
else
-- Treat as an object
for k, v in pairs(val) do
--[[
if type(k) ~= "string" then
error("invalid table: mixed or invalid key types")
end
]]
if k ~= "_" then
table.insert(res, encode(k, stack) .. ":" .. encode(v, stack))
end
end
]]
table.insert(res, encode(k, stack) .. ":" .. encode(v, stack))
stack[val] = nil
return "{" .. table.concat(res, ",") .. "}"
end
stack[val] = nil
return "{" .. table.concat(res, ",") .. "}"
end
end

Expand Down