src/marnav/nmea/wcv.cpp

   1 #include <marnav/nmea/wcv.hpp>
   2 #include <marnav/nmea/io.hpp>
   3 #include "checks.hpp"
   4
   5 namespace marnav::nmea
   6 {
   7 constexpr sentence_id wcv::ID;
   8 constexpr const char * wcv::TAG;
   9
  10 wcv::wcv()
  11         : sentence(ID, TAG, talker::global_positioning_system)
  12 {
  13 }
  14
  15 wcv::wcv(talker talk, fields::const_iterator first, fields::const_iterator last)
  16         : sentence(ID, TAG, talk)
  17 {
  18         if (std::distance(first, last) != 3)
  19                 throw std::invalid_argument{"invalid number of fields in wcv"};
  20
  21         std::optional<unit::velocity> speed_unit;
  22
  23         read(*(first + 0), speed_);
  24         read(*(first + 1), speed_unit);
  25         read(*(first + 2), waypoint_id_);
  26
  27         check_value(speed_unit, {unit::velocity::knot}, "speed unit");
  28 }
  29
  30 void wcv::set_speed(units::velocity t) noexcept
  31 {
  32         speed_ = t.get<units::knots>();
  33 }
  34
  35 std::optional<units::velocity> wcv::get_speed() const
  36 {
  37         if (!speed_)
  38                 return {};
  39         return {*speed_};
  40 }
  41
  42 void wcv::append_data_to(std::string & s, const version &) const
  43 {
  44         append(s, format(speed_, 1));
  45         append(s, to_string_if(unit::velocity::knot, speed_));
  46         append(s, to_string(waypoint_id_));
  47 }
  48 }