Added FSM and Game State Manager

src/game/GameStateManager.h

@@ -0,0 +1,57 @@
+#pragma once
+#include "StateMachine.h"
+
+// Structure to hold event data passed into state StateMachine
+struct GameData : public EventData
+{
+        char* menuId;
+        bool win;
+};
+
+// The Game State Machine Class
+class GameStateManager : public StateMachine
+{
+public:
+    GameStateManager() : StateMachine(ST_MAX_STATES) {}
+    
+    // external events taken by this state machine
+    void AdvanceState();
+    void GameOver();
+    void PauseGame(GameData* gameData);
+private:
+    //state machine state functions
+    void ST_Init(EventData*);
+    void ST_TitleScreen(EventData*);
+    void ST_Instructions(GameData*);
+    void ST_HiScoreList(GameData*);
+    void ST_Credits(GameData*);
+    void ST_CoreGame(EventData*);
+    void ST_PauseScreen(EventData*);
+    void ST_GameOver(GameData*);
+    
+    //state map to define state function order
+    BEGIN_STATE_MAP
+        STATE_MAP_ENTRY(&GameStateManager::ST_Init)
+        STATE_MAP_ENTRY(&GameStateManager::ST_TitleScreen)
+        STATE_MAP_ENTRY(&GameStateManager::ST_Instructions)
+        STATE_MAP_ENTRY(&GameStateManager::ST_HiScoreList)
+        STATE_MAP_ENTRY(&GameStateManager::ST_Credits)
+        STATE_MAP_ENTRY(&GameStateManager::ST_CoreGame)
+        STATE_MAP_ENTRY(&GameStateManager::ST_PauseScreen)
+        STATE_MAP_ENTRY(&GameStateManager::ST_GameOver)
+    END_STATE_MAP
+    
+    //state enumeration order must match order of state method entries on state map
+    enum E_States {
+            ST_INIT = 0,
+            ST_TITLESCREEN,
+            ST_INSTRUCTIONS,
+            ST_HISCORELIST,
+            ST_CREDITS,
+            ST_COREGAME,
+            ST_PAUSESCREEN,
+            ST_GAMEOVER,
+            ST_MAX_STATES
+    };
+};
+