Function NewUserData

source/userdata.cpp:255–303

// ***********************************************************************

i32 NewUserData(lua_State* L) {
	i32 nArgs = lua_gettop(L);
    const char* typeStr = luaL_checkstring(L, 1);
    i32 width = (i32)luaL_checkinteger(L, 2);
	i32 height = 1;
	String dataStr;

	if (nArgs > 2) {
		if (lua_isnumber(L, 3)) {
			height = (i32)lua_tointeger(L, 3);
		}
		else if (lua_isstring(L, 3)) {
			dataStr = lua_tostring(L, 3);
		}
		else {
			luaL_error(L, "Unexpected 3rd argument to userdata, should be integer or string");
		}
	}

	if (nArgs > 3) {
		u64 len;
		dataStr.pData = (char*)luaL_checklstring(L, 4, &len);
		dataStr.length = (i64)len;
	}

	Type type;
	if (strcmp(typeStr, "f32") == 0) {
		type = Type::Float32;
	}
	else if (strcmp(typeStr, "i32") == 0) {
		type = Type::Int32;
	}
	else if (strcmp(typeStr, "i16") == 0) {
		type = Type::Int16;
	}
	else if (strcmp(typeStr, "u8") == 0) {
		type = Type::Uint8;
	}
	else {
		luaL_error(L, "invalid type given to userdata creation %s", typeStr);
		return 0;
	}
	UserData* pUserData = AllocUserData(L, type, width, height);

	if (dataStr.length > 0) {
		ParseUserDataDataString(L, dataStr, pUserData); 
	}
	return 1;
}

// ***********************************************************************