Wow, it is standard procedure

DUI_FSM_H #ifndef 
#define DUI_FSM_H 
#ifdef the __cplusplus 
extern "C" { 
#endif 

// finite state machine implementation 

// [current state] perform the [operation] The [trigger event] and into [next state] 
typedef struct { 
    // trigger event 
    int event; 
    // current status 
    int cur_state; 
    // perform an action 
    void (action *) (void * UserData); 
    // next state 
    int next_state; 
} dui_fsm_transfer_t; 

typedef struct { 
    // current status 
    int cur_state; 
    // state transition table 
    dui_fsm_transfer_t * T; 
    // size of the state transition table 
    int t_size; 
} dui_fsm_t; 

void dui_fsm_handle (dui_fsm_t * Self, Event int, void * UserData); 
 
#ifdef the __cplusplus
} 
#endif
#endif