Update talents + beasts

tools/luajson/json/encode/output_utility.lua

@@ -0,0 +1,54 @@
+--[[
+	Licensed according to the included 'LICENSE' document
+	Author: Thomas Harning Jr <harningt@gmail.com>
+]]
+local setmetatable = setmetatable
+local assert, loadstring = assert, loadstring or load
+
+local _ENV = nil
+
+-- Key == weak, if main key goes away, then cache cleared
+local outputCache = setmetatable({}, {__mode = 'k'})
+-- TODO: inner tables weak?
+
+local function buildFunction(nextValues, innerValue, valueWriter, innerWriter)
+	local putInner = ""
+	if innerValue and innerWriter then
+		-- Prepare the lua-string representation of the separator to put in between values
+		local formattedInnerValue = ("%q"):format(innerValue)
+		-- Fill in the condition %WRITE_INNER% and the %INNER_VALUE% to actually write
+		putInner = innerWriter:gsub("%%WRITE_INNER%%", "%%1"):gsub("%%INNER_VALUE%%", formattedInnerValue)
+	end
+	-- Template-in the value writer (if present) and its conditional argument
+	local functionCode = nextValues:gsub("PUTINNER(%b())", putInner)
+	-- %VALUE% is to be filled in by the value-to-write
+	valueWriter = valueWriter:gsub("%%VALUE%%", "%%1")
+	-- Template-in the value writer with its argument
+	functionCode = functionCode:gsub("PUTVALUE(%b())", valueWriter)
+	functionCode = [[
+		return function(composite, ret, encode, state)
+	]] .. functionCode .. [[
+		end
+	]]
+	return assert(loadstring(functionCode))()
+end
+
+local function prepareEncoder(cacheKey, nextValues, innerValue, valueWriter, innerWriter)
+	local cache = outputCache[cacheKey]
+	if not cache then
+		cache = {}
+		outputCache[cacheKey] = cache
+	end
+	local fun = cache[nextValues]
+	if not fun then
+		fun = buildFunction(nextValues, innerValue, valueWriter, innerWriter)
+		cache[nextValues] = fun
+	end
+	return fun
+end
+
+local output_utility = {
+	prepareEncoder = prepareEncoder
+}
+
+return output_utility