public:

enum class Status {

kUnsure, //!< 尚不确定

kEnsure, //!< 已确定

kFail, //!< 匹配失败

};

void start();

Status next(uint8_t byte);

Status stop();

enum class Result {

kNone,

kPrintable,

kTab, kBackspace, kESC, kEnter, //! 常规键

kAltPlus, kCtrlAltPlus, //!< 组合键

kMoveUp, kMoveDown, kMoveLeft, kMoveRight, //!< 方向键

kHome, kInsert, kDelete, kEnd, kPageUp, kPageDown,

kF1, kF2, kF3, kF4, kF5, kF6, kF7, kF8, kF9, kF10, kF11, kF12 //!< Fn 键

};

inline Result result() const { return result_; }

inline uint8_t extra() const { return extra_; }

private:

enum class Step {

kNone,

k0d, kc2,

k1b, k1b5b,

k1b5b31, k1b5b3135, k1b5b3137, k1b5b3138, k1b5b3139,

k1b5b32, k1b5b3230, k1b5b3231, k1b5b3233, k1b5b3234,

k1b5b33,

k1b5b34,

k1b5b35,

k1b5b36,

k1b4f,

};

Result result_ = Result::kNone;

uint8_t extra_ = 0;

Step step_ = Step::kNone;