Cleaned up the code for love.math.random and related functions.

src/modules/math/MathModule.h

@@ -55,56 +55,9 @@ public:
 
 	virtual ~Math();
 
-	/**
-	 * @copydoc RandomGenerator::random()
-	 **/
-	inline double random()
+	RandomGenerator *getRandomGenerator()
 	{
-		return rng.random();
-	}
-
-	/**
-	 * @copydoc RandomGenerator::random(double)
-	 **/
-	inline double random(double max)
-	{
-		return rng.random(max);
-	}
-
-	/**
-	 * @copydoc RandomGenerator::random(double,double)
-	 **/
-	inline double random(double min, double max)
-	{
-		return rng.random(min, max);
-	}
-
-	/**
-	 * @copydoc RandomGenerator::randomNormal()
-	 **/
-	inline double randomNormal(double stddev)
-	{
-		return rng.randomNormal(stddev);
-	}
-
-	inline void setRandomSeed(RandomGenerator::Seed seed)
-	{
-		rng.setSeed(seed);
-	}
-
-	inline RandomGenerator::Seed getRandomSeed() const
-	{
-		return rng.getSeed();
-	}
-
-	inline void setRandomState(const std::string &statestr)
-	{
-		rng.setState(statestr);
-	}
-
-	inline std::string getRandomState() const
-	{
-		return rng.getState();
+		return &rng;
 	}
 
 	/**

src/modules/math/wrap_Math.cpp

@@ -39,45 +39,10 @@ namespace love
 namespace math
 {
 
-int w__random(lua_State *L)
+int w__getRandomGenerator(lua_State *L)
 {
-	lua_pushnumber(L, Math::instance.random());
-	return 1;
-}
-
-int w_randomNormal(lua_State *L)
-{
-	double stddev = luaL_optnumber(L, 1, 1.0);
-	double mean = luaL_optnumber(L, 2, 0.0);
-	double r = Math::instance.randomNormal(stddev);
-
-	lua_pushnumber(L, r + mean);
-	return 1;
-}
-
-int w_setRandomSeed(lua_State *L)
-{
-	luax_catchexcept(L, [&](){ Math::instance.setRandomSeed(luax_checkrandomseed(L, 1)); });
-	return 0;
-}
-
-int w_getRandomSeed(lua_State *L)
-{
-	RandomGenerator::Seed s = Math::instance.getRandomSeed();
-	lua_pushnumber(L, (lua_Number) s.b32.low);
-	lua_pushnumber(L, (lua_Number) s.b32.high);
-	return 2;
-}
-
-int w_setRandomState(lua_State *L)
-{
-	luax_catchexcept(L, [&](){ Math::instance.setRandomState(luax_checkstring(L, 1)); });
-	return 0;
-}
-
-int w_getRandomState(lua_State *L)
-{
-	luax_pushstring(L, Math::instance.getRandomState());
+	RandomGenerator *t = Math::instance.getRandomGenerator();
+	luax_pushtype(L, MATH_RANDOM_GENERATOR_ID, t);
 	return 1;
 }
 
@@ -423,8 +388,6 @@ int w_decompress(lua_State *L)
 // C functions in a struct, necessary for the FFI versions of math functions.
 struct FFI_Math
 {
-	double (*random)(void);
-
 	float (*noise1)(float x);
 	float (*noise2)(float x, float y);
 	float (*noise3)(float x, float y, float z);
@@ -436,11 +399,6 @@ struct FFI_Math
 
 static FFI_Math ffifuncs =
 {
-	[](void) -> double // random
-	{
-		return Math::instance.random();
-	},
-
 	[](float x) -> float // noise1
 	{
 		return Math::instance.noise(x);
@@ -471,12 +429,9 @@ static FFI_Math ffifuncs =
 // List of functions to wrap.
 static const luaL_Reg functions[] =
 {
-	{ "_random", w__random }, // love.math.random is inside wrap_Math.lua.
-	{ "randomNormal", w_randomNormal },
-	{ "setRandomSeed", w_setRandomSeed },
-	{ "getRandomSeed", w_getRandomSeed },
-	{ "setRandomState", w_setRandomState },
-	{ "getRandomState", w_getRandomState },
+	// love.math.random etc. are defined in wrap_Math.lua.
+
+	{ "_getRandomGenerator", w__getRandomGenerator },
 	{ "newRandomGenerator", w_newRandomGenerator },
 	{ "newBezierCurve", w_newBezierCurve },
 	{ "triangulate", w_triangulate },
@@ -510,7 +465,7 @@ extern "C" int luaopen_love_math(lua_State *L)
 
 	int n = luax_register_module(L, w);
 
-	// Execute wrap_Event.lua, sending the math table and ffifuncs pointer as args.
+	// Execute wrap_Math.lua, sending the math table and ffifuncs pointer as args.
 	luaL_loadbuffer(L, math_lua, sizeof(math_lua), "wrap_Math.lua");
 	lua_pushvalue(L, -2);
 	lua_pushlightuserdata(L, &ffifuncs);

src/modules/math/wrap_Math.lua

@@ -27,24 +27,30 @@ local love_math, ffifuncspointer = ...
 local type, tonumber, error = type, tonumber, error
 local floor = math.floor
 
-local _random = love_math._random
-
-local function getrandom(r, l, u)
-	if u ~= nil then
-		if type(r) ~= "number" then error("bad argument #1 to 'random' (number expected)", 2) end
-		if type(l) ~= "number" then error("bad argument #2 to 'random' (number expected)", 2) end
-		return floor(r * (u - l + 1)) + l
-	elseif l ~= nil then
-		if type(l) ~= "number" then error("bad argument #1 to 'random' (number expected)", 2) end
-		return floor(r * l) + 1
-	else
-		return r
-	end
-end
+local rng = love_math._getRandomGenerator()
 
 function love_math.random(l, u)
-	local r = _random()
-	return getrandom(r, l, u)
+	return rng:random(l, u)
+end
+
+function love_math.randomNormal(stddev, mean)
+	return rng:randomNormal(stddev, mean)
+end
+
+function love_math.setRandomSeed(low, high)
+	return rng:setSeed(low, high)
+end
+
+function love_math.getRandomSeed()
+	return rng:getSeed()
+end
+
+function love_math.setRandomState(state)
+	return rng:setState(state)
+end
+
+function love_math.getRandomState()
+	return rng:getState()
 end
 
 if type(jit) ~= "table" or not jit.status() then
@@ -60,8 +66,6 @@ if not status then return end
 pcall(ffi.cdef, [[
 typedef struct FFI_Math
 {
-	double (*random)(void);
-
 	float (*noise1)(float x);
 	float (*noise2)(float x, float y);
 	float (*noise3)(float x, float y, float z);
@@ -77,11 +81,6 @@ local ffifuncs = ffi.cast("FFI_Math *", ffifuncspointer)
 
 -- Overwrite some regular love.math functions with FFI implementations.
 
-function love_math.random(l, u)
-	local r = tonumber(ffifuncs.random())
-	return getrandom(r, l, u)
-end
-
 function love_math.noise(x, y, z, w)
 	if w ~= nil then
 		return tonumber(ffifuncs.noise4(x, y, z, w))