range.cpp

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#include <novatel_gps_driver/parsers/range.h>
#include <novatel_gps_driver/parsers/header.h>

#include <boost/make_shared.hpp>

const std::string novatel_gps_driver::RangeParser::MESSAGE_NAME = "RANGE";

uint32_t novatel_gps_driver::RangeParser::GetMessageId() const
{
  return MESSAGE_ID;
}

const std::string novatel_gps_driver::RangeParser::GetMessageName() const
{
  return MESSAGE_NAME;
}

novatel_gps_msgs::RangePtr
novatel_gps_driver::RangeParser::ParseBinary(const novatel_gps_driver::BinaryMessage& bin_msg) throw(ParseException)
{
  uint32_t num_obs = ParseUInt32(&bin_msg.data_[0]);
  if (bin_msg.data_.size() != (BINARY_OBSERVATION_SIZE * num_obs) + 4)
  {
    std::stringstream error;
    error << "Unexpected range message size: " << bin_msg.data_.size();
    throw ParseException(error.str());
  }
  novatel_gps_msgs::RangePtr ros_msg = boost::make_shared<novatel_gps_msgs::Range>();
  HeaderParser h_parser;
  ros_msg->novatel_msg_header = h_parser.ParseBinary(bin_msg);
  ros_msg->novatel_msg_header.message_name = "RANGE";

  ros_msg->numb_of_observ = num_obs;
  ros_msg->info.reserve(num_obs);
  for(int i = 0; i < num_obs; i++)
  {
    size_t obs_offset = 4 + i * BINARY_OBSERVATION_SIZE;

    novatel_gps_msgs::RangeInformation info;

    info.prn_number = ParseUInt16(&bin_msg.data_[obs_offset]);
    info.glofreq = ParseUInt16(&bin_msg.data_[obs_offset+2]);
    info.psr = ParseDouble(&bin_msg.data_[obs_offset+4]);
    info.psr_std = ParseFloat(&bin_msg.data_[obs_offset+12]);
    info.adr = ParseDouble(&bin_msg.data_[obs_offset+16]);
    info.adr_std = ParseFloat(&bin_msg.data_[obs_offset+24]);
    info.dopp = ParseFloat(&bin_msg.data_[obs_offset+28]);
    info.noise_density_ratio = ParseFloat(&bin_msg.data_[obs_offset+32]);
    info.locktime = ParseFloat(&bin_msg.data_[obs_offset+36]);
    info.tracking_status = ParseUInt32(&bin_msg.data_[obs_offset+40]);

    ros_msg->info.push_back(info);
  }
  return ros_msg;
}

novatel_gps_msgs::RangePtr
novatel_gps_driver::RangeParser::ParseAscii(const novatel_gps_driver::NovatelSentence& sentence) throw(ParseException)
{
  novatel_gps_msgs::RangePtr msg = boost::make_shared<novatel_gps_msgs::Range>();
  HeaderParser h_parser;
  msg->novatel_msg_header = h_parser.ParseAscii(sentence);
  if (!ParseInt32(sentence.body[0], msg->numb_of_observ, 10))
  {
    std::stringstream error;
    error << "Unable to parse number of observations in RANGE log.";
    throw ParseException(error.str());
  }
  uint32_t numb_of_observ = static_cast<uint32_t>(msg->numb_of_observ);
  if (sentence.body.size() != 1 + numb_of_observ * ASCII_FIELDS)
  {
    std::stringstream error;
    error << "Did not find expected number of observations in RANGE log.";
    throw ParseException(error.str());
  }
  bool valid = true;
  valid &= ParseInt32(sentence.body[0], msg->numb_of_observ, 10);
  msg->info.resize(numb_of_observ);
  for (int i = 0, index = 0; index < numb_of_observ; i += 10, index++)
  {
    valid &= ParseUInt16(sentence.body[i + 1], msg->info[index].prn_number, 10);
    valid &= ParseUInt16(sentence.body[i + 2], msg->info[index].glofreq, 10);
    valid &= ParseDouble(sentence.body[i + 3], msg->info[index].psr);
    valid &= ParseFloat(sentence.body[i + 4], msg->info[index].psr_std);
    valid &= ParseDouble(sentence.body[i + 5], msg->info[index].adr);
    valid &= ParseFloat(sentence.body[i + 6], msg->info[index].adr_std);
    valid &= ParseFloat(sentence.body[i + 7], msg->info[index].dopp);
    valid &= ParseFloat(sentence.body[i + 8], msg->info[index].noise_density_ratio);
    valid &= ParseFloat(sentence.body[i + 9], msg->info[index].locktime);
    std::string track = "0x" + sentence.body[i + 10]; // This number is in hex
    valid &= ParseUInt32(track, msg->info[index].tracking_status, 16);
  }
  if (!valid)
  {
    throw ParseException("Error parsing RANGE log.");
  }
  return msg;
}