Title:           [C++] class GameStateManager { public: static GameState State[0x1000]; static U64
Author:          dajfarrell
Pastebin link:   http://pastebin.com/WktfrWdj
First Edit:      Tuesday 19th of February 2013 07:48:03 AM CDT
Last Edit:       Tuesday 19th of February 2013 07:48:03 AM CDT

class GameStateManager {
public:
        static GameState State[0x1000];
        static U64 Tail;
 
        static GameState & GetState(U64 offset = 0) {
                for(; offset > Tail; offset -= 0x1000);
                return State[Tail - offset];
        }
 
        static void CopyState(U64 src, U64 dst) {
                if(src < 0x1000 && dst < 0x1000) {
                        for(U64 iKey=0; iKey<0x100; ++iKey) {
                                State[dst].keyboard[iKey] = State[src].keyboard[iKey];
                        }
                }
        }
 
        static void Increment(U64 times = 1) {
                for(U64 i=0; i<times; ++i) {
                        U64 previousTail = Tail;
                       
                        ++Tail;
                        if(Tail == 0x1000) {
                                Tail = 0;
                        }
 
                        CopyState(previousTail, Tail);
                }
        }
};