FSM.h

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#ifndef __FINITE_STATE_MACHINE_H
#define __FINITE_STATE_MACHINE_H

#include "DS_List.h"

class State;

// Finite state machine
// Stores a stack of states
// The top of the stack is the current state.  There is only one current state.  The stack contains the state history.
// OnEnter, OnLeave, FSMAddRef, FSMRemoveRef of class State is called as appropriate.
class FSM
{
public:
        FSM();
        ~FSM();
        void Clear(void);
        State *CurrentState(void) const;
        State *GetState(const int index) const;
        int GetStateIndex(State *state) const;
        int GetStateHistorySize(void) const;
        void RemoveState(const int index);
        void AddState(State *state);
        void ReplaceState(const int index, State *state);
        void SetPriorState(const int index);

protected:
        DataStructures::List<State*> stateHistory;
};


#endif