src/marnav/nmea/ttm.cpp

   1 #include "ttm.hpp"
   2 #include <marnav/nmea/checks.hpp>
   3 #include <marnav/nmea/io.hpp>
   4
   5 namespace marnav
   6 {
   7 namespace nmea
   8 {
   9 MARNAV_NMEA_DEFINE_SENTENCE_PARSE_FUNC(ttm)
  10
  11 constexpr const char * ttm::TAG;
  12
  13 ttm::ttm()
  14         : sentence(ID, TAG, talker_id::global_positioning_system)
  15 {
  16 }
  17
  18 ttm::ttm(talker talk, fields::const_iterator first, fields::const_iterator last)
  19         : sentence(ID, TAG, talk)
  20 {
  21         // according to http://catb.org/gpsd/NMEA.html#_ttm_tracked_target_message
  22         // there are fields 14 and 15, but not supported by this implementation.
  23
  24         const auto dist = std::distance(first, last);
  25
  26         if ((dist < 13) || (dist > 15))
  27                 throw std::invalid_argument{"invalid number of fields in ttm"};
  28
  29         read(*(first + 0), target_number);
  30         read(*(first + 1), target_distance);
  31         read(*(first + 2), bearing_from_ownship);
  32         read(*(first + 3), bearing_from_ownship_ref);
  33         read(*(first + 4), target_speed);
  34         read(*(first + 5), target_course);
  35         read(*(first + 6), target_course_ref);
  36         read(*(first + 7), distance_cpa);
  37         read(*(first + 8), tcpa);
  38         read(*(first + 9), unknown);
  39         read(*(first + 10), target_name);
  40         read(*(first + 11), target_status);
  41         read(*(first + 12), reference_target);
  42 }
  43
  44 std::vector<std::string> ttm::get_data() const
  45 {
  46         return {format(target_number, 2), to_string(target_distance),
  47                 to_string(bearing_from_ownship), to_string(bearing_from_ownship_ref),
  48                 to_string(target_speed), to_string(target_course), to_string(target_course_ref),
  49                 to_string(distance_cpa), to_string(tcpa), to_string(unknown), to_string(target_name),
  50                 to_string(target_status), to_string(reference_target)};
  51 }
  52 }
  53 }