json表支持null

2 files changed, 63 insertions, 0 deletions

diff --git a/server/src/json/init.lua b/server/src/json/init.lua
index c28e7aed..db513678 100644
--- a/server/src/json/init.lua
+++ b/server/src/json/init.lua
@@ -1,6 +1,7 @@
 local api = {
     decode = require 'json.decode',
     encode = require 'json.encode',
+    table  = require 'json.table',
 }
 
 return api
diff --git a/server/src/json/table.lua b/server/src/json/table.lua
new file mode 100644
index 00000000..351bfe07
--- /dev/null
+++ b/server/src/json/table.lua
@@ -0,0 +1,62 @@
+
+local pairs = pairs
+local next = next
+local sort = table.sort
+local type = type
+local rawset = rawset
+local move = table.move
+local setmetatable = setmetatable
+
+local function sort_table(tbl)
+	if not tbl then
+		tbl = {}
+	end
+	local mt = {}
+	local keys = {}
+	local mark = {}
+	local n = 0
+	for key in next, tbl do
+		n=n+1;keys[n] = key
+		mark[key] = true
+	end
+	sort(keys)
+	function mt:__newindex(key, value)
+		rawset(self, key, value)
+		n=n+1;keys[n] = key
+		mark[key] = true
+		if type(value) == 'table' then
+			sort_table(value)
+		end
+	end
+	function mt:__pairs()
+		local list = {}
+		local m = 0
+		for key in next, self do
+			if not mark[key] then
+				m=m+1;list[m] = key
+			end
+		end
+		if m > 0 then
+			move(keys, 1, n, m+1)
+			sort(list)
+			for i = 1, m do
+				local key = list[i]
+				keys[i] = key
+				mark[key] = true
+			end
+			n = n + m
+		end
+		local i = 0
+		return function ()
+			i = i + 1
+			local key = keys[i]
+			return key, self[key]
+		end
+	end
+	
+	return setmetatable(tbl, mt)
+end
+
+return function (tbl)
+    return sort_table(tbl)
+end