1 files changed, 135 insertions, 0 deletions
diff --git a/script/json/encode.lua b/script/json/encode.lua
new file mode 100644
index 00000000..97a1680b
--- /dev/null
+++ b/script/json/encode.lua
@@ -0,0 +1,135 @@
+
+local rep = string.rep
+local format = string.format
+local gsub = string.gsub
+local sub = string.sub
+local sort = table.sort
+local find = string.find
+local tostring = tostring
+local getmetatable = debug.getmetatable
+local type = type
+local next = next
+local ipairs = ipairs
+
+local index
+local lines
+local n = -1
+local tabs = {}
+
+local esc_map = {
+	['\\'] = '\\\\',
+	['\r'] = '\\r',
+	['\n'] = '\\n',
+	['\t'] = '\\t',
+	['"']  = '\\"',
+}
+
+local function encode(data, key)
+	n = n + 1
+	if not tabs[n] then
+		tabs[n] = rep('    ', n)
+	end
+	local tp = type(data)
+	if tp == 'table' then
+		if not data[1] and next(data) then
+			-- 认为这个是哈希表
+			if key then
+				index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": {\r\n'
+			else
+				index=index+1;lines[index] = tabs[n] .. '{\r\n'
+			end
+			local meta = getmetatable(data)
+			local sep
+			if meta and meta.__pairs then
+				for k, v in meta.__pairs(data), data do
+					if encode(v, k) then
+						index=index+1;lines[index] = ',\r\n'
+						sep = true
+					end
+				end
+			else
+				local list = {}
+				local i = 0
+				for k in next, data do
+					i=i+1;list[i] = k
+				end
+				sort(list)
+				for j = 1, i do
+					local k = list[j]
+					if encode(data[k], k) then
+						index=index+1;lines[index] = ',\r\n'
+						sep = true
+					end
+				end
+			end
+			if sep then
+				lines[index] = '\r\n'
+			end
+			index=index+1;lines[index] = tabs[n] .. '}'
+		else
+			-- 认为这个是数组
+			if key then
+				index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": [\r\n'
+			else
+				index=index+1;lines[index] = tabs[n] .. '[\r\n'
+			end
+			local sep
+			for k, v in pairs(data) do
+				if encode(v) then
+					index=index+1;lines[index] = ',\r\n'
+					sep = true
+				end
+			end
+			if sep then
+				lines[index] = '\r\n'
+			end
+			index=index+1;lines[index] = tabs[n] .. ']'
+		end
+	elseif tp == 'number' then
+		data = tostring(data)
+		-- 判断 inf -inf -nan(ind) 1.#INF -1.#INF -1.#IND
+		if find(data, '%a') then
+			data = '0'
+		end
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": ' .. data
+		else
+			index=index+1;lines[index] = tabs[n] .. data
+		end
+	elseif tp == 'boolean' then
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": ' .. tostring(data)
+		else
+			index=index+1;lines[index] = tabs[n] .. tostring(data)
+		end
+	elseif tp == 'nil' then
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": null'
+		else
+			index=index+1;lines[index] = tabs[n] .. 'null'
+		end
+	elseif tp == 'string' then
+		local str = gsub(data, '[\\\r\n\t"]', esc_map)
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": "' .. str .. '"'
+		else
+			index=index+1;lines[index] = tabs[n] .. '"' .. str .. '"'
+		end
+	else
+		n = n - 1
+		return false
+	end
+	n = n - 1
+	return true
+end
+
+local function json(t)
+	lines = {}
+	index = 0
+
+	encode(t)
+
+	return table.concat(lines)
+end
+
+return json