mcm_utils.h File Reference

Utility functions for the ETSI ITS MCM (TR) More...

#include <etsi_its_msgs_utils/impl/checks.h>
#include <etsi_its_msgs_utils/impl/constants.h>

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Functions
uint64_t	getUnixNanosecondsFromGenerationDeltaTime (const GenerationDeltaTime &generation_delta_time, const uint64_t unix_timestamp_estimate, const uint16_t n_leap_seconds=etsi_its_msgs::LEAP_SECOND_INSERTIONS_SINCE_2004.rbegin() ->second)
	Get the Unix Nanoseconds from Generation Delta Time object.

Detailed Description

Utility functions for the ETSI ITS MCM (TR)

Definition in file mcm_utils.h.

Function Documentation

getUnixNanosecondsFromGenerationDeltaTime()

uint64_t getUnixNanosecondsFromGenerationDeltaTime ( const GenerationDeltaTime & generation_delta_time, const uint64_t unix_timestamp_estimate, const uint16_t n_leap_seconds = etsi_its_msgs::LEAP_SECOND_INSERTIONS_SINCE_2004.rbegin()->second )

inline

Get the Unix Nanoseconds from Generation Delta Time object.

Parameters

generation_delta_time	the GenerationDeltaTime object to get the Unix-Nanoseconds from
unix_timestamp_estimate	estimated unix-time (in Nanoseconds) to calculate the corresponding generation from
n_leap_seconds	number of leap-seconds since 2004. (Defaults to the todays number of leap seconds since 2004.)

Returns

uint64_t the corresponding Unix-Nanoseconds

Definition at line 46 of file mcm_utils.h.

                                                                                                     {
  uint64_t ms_estimate_after_utc_2004 =
      unix_timestamp_estimate * 1e-6 + (uint64_t)(n_leap_seconds * 1e3) - etsi_its_msgs::UNIX_SECONDS_2004 * 1e3;
  uint64_t ms_after_utc_2004 = std::floor(ms_estimate_after_utc_2004 / 65536) * 65536 + generation_delta_time.value;
  return ms_after_utc_2004 * 1e6 + etsi_its_msgs::UNIX_SECONDS_2004 * 1e9 - n_leap_seconds * 1e9;
}