include/marnav/ais/rate_of_turn.hpp

   1 #ifndef MARNAV_AIS_RATE_OF_TURN_HPP
   2 #define MARNAV_AIS_RATE_OF_TURN_HPP
   3
   4 #include <cstdint>
   5
   6 namespace marnav
   7 {
   8 namespace ais
   9 {
  10 class rate_of_turn
  11 {
  12 public:
  13         using value_type = int8_t;
  14
  15         enum : value_type {
  16                 not_turning = 0,
  17                 more_5deg_per_30s_abs = 127,
  18                 more_5deg_per_30s_right = +more_5deg_per_30s_abs,
  19                 more_5deg_per_30s_left = -more_5deg_per_30s_abs,
  20                 no_information_available = -128
  21         };
  22
  23         rate_of_turn() = default;
  24
  25         rate_of_turn(const rate_of_turn &) = default;
  26         rate_of_turn & operator=(const rate_of_turn &) = default;
  27
  28         rate_of_turn(rate_of_turn &&) = default;
  29         rate_of_turn & operator=(rate_of_turn &&) = default;
  30
  31         explicit rate_of_turn(double deg_per_minute);
  32
  33         explicit rate_of_turn(value_type raw_value)
  34                 : value_(raw_value)
  35         {
  36         }
  37
  38         double value() const;
  39
  40         value_type raw() const noexcept { return value_; }
  41
  42         operator double() const { return value(); }
  43
  44         bool available() const noexcept { return value_ != no_information_available; }
  45         bool is_not_turning() const noexcept { return value_ == not_turning; }
  46         bool is_more_5deg30s_right() const noexcept { return value_ == more_5deg_per_30s_right; }
  47         bool is_more_5deg30s_left() const noexcept { return value_ == more_5deg_per_30s_left; }
  48
  49 private:
  50         value_type value_ = no_information_available;
  51 };
  52 }
  53 }
  54
  55 #endif