Utility Namespace for Time related tasks. More...

Functions
constexpr int32_t	daysInMonth (int32_t month, int32_t year)
	Returns the number of days in the specified month of the year.

constexpr std::string	formatDuration (double seconds, size_t digits=9)
	Formats a duration given in seconds into days, hours, minutes and seconds.

constexpr bool	isLeapYear (int32_t year)
	Returns true if the provided year is a leap year, false otherwise.

Variables
constexpr int32_t	DAYS_PER_WEEK
	Days / Week.

constexpr int32_t	DAYS_PER_YEAR
	Days / Year.

constexpr int32_t	DIFF_BDT_WEEK_TO_GPST_WEEK
	BeiDou starts zero at 1-Jan-2006 and GPS starts 6-Jan-1980.

constexpr int32_t	DIFF_MJD_TO_JD_DAYS
	Difference of the days between MJD and JD.

constexpr long double	DIFF_MJD_TO_JD_FRAC
	Difference of the fraction between MJD and JD.

constexpr int32_t	DIFF_TO_1_1_1970_MJD
	01.01.1970 00:00:00 UTC in Modified Julian Date (UNIX epoch)

constexpr int32_t	DIFF_TO_6_1_1980_MJD
	06.01.1980 in Modified Julian Date

constexpr int32_t	END_OF_THE_CENTURY_MJD
	Modified Julian Date of the end of the century (15.01.2954)

constexpr long double	EPSILON

constexpr std::array< int32_t, 20 >	GPS_LEAP_SEC_MJD
	Maps GPS leap seconds to a time: array<mjd_day>, index + 1 is amount of leap seconds.

constexpr int32_t	HOURS_PER_DAY
	Hours / Day.

constexpr int32_t	HOURS_PER_WEEK
	Hours / Week.

constexpr int32_t	MINUTES_PER_DAY
	Minutes / Day.

constexpr int32_t	MINUTES_PER_HOUR
	Minutes / Hour.

constexpr int32_t	MINUTES_PER_WEEK
	Minutes / Week.

constexpr int32_t	MONTHS_PER_YEAR
	Months / Year.

constexpr int32_t	SECONDS_PER_DAY
	Seconds / Day.

constexpr int32_t	SECONDS_PER_HOUR
	Seconds / Hour.

constexpr int32_t	SECONDS_PER_MINUTE
	Seconds / Minute.

constexpr int32_t	SECONDS_PER_WEEK
	Seconds / Week.

constexpr int32_t	WEEKS_PER_GPS_CYCLE
	Weeks per GPS cycle.

Detailed Description

Utility Namespace for Time related tasks.

Function Documentation

int32_t NAV::InsTimeUtil::daysInMonth	(	int32_t	month,
		int32_t	year )

constexpr

Returns the number of days in the specified month of the year.

Parameters

[in]	month	Month [1-12]
[in]	year	Year to determine the leap year

std::string NAV::InsTimeUtil::formatDuration	(	double	seconds,
		size_t	digits = 9 )

constexpr

Formats a duration given in seconds into days, hours, minutes and seconds.

Parameters

[in]	seconds	Amount of seconds
[in]	digits	Digits to round the seconds to

bool NAV::InsTimeUtil::isLeapYear ( int32_t year )

constexpr

Returns true if the provided year is a leap year, false otherwise.

Parameters

[in] year The year to check

long double NAV::InsTimeUtil::EPSILON

constexpr

Numerical precision/epsilon for 'long double' variables

Linux/x64: 1e-19
Windows/x64 1e-16
Linux/armv8: 1e-34 (Epsilon reports too small precision. Real precision is only approx. 1e-17)