#include <ngc/core/ngcb.h>
#include <time.h>
#include <sys/timex.h>
#include <poll.h>

Macros
#define	_GNU_SOURCE

#define	_REENTRANT

Functions
int	ngcbTaiOffset ()

int	ngcbGetTime (struct timeval *t)

void	ngcbSubTime (struct timeval t1, struct timeval t2, struct timeval *t3)

void	ngcbAddTime (struct timeval t1, struct timeval t2, struct timeval *t3)

void	ngcbAddSec (struct timeval *t, double seconds)

int	ngcbGetUTC (char *utc, int precision)

double	ngcbGetMJD (void)

void	ngcbTime2UTC (struct timeval t, char *utc, int precision)

double	ngcbTime2MJD (struct timeval t)

void	ngcbMJD2UTC (double mjd, char *utc, int precision)

double	ngcbUTC2MJD (const char *utc)

int	ngcbMicroSleep (int fd, int waitTime)

int	ngcbSleep (int fd, int waitTime)

void	ngcbAddTimeFrac (uint64_t sec, uint64_t nsec, double t)

void	ngcbTimeFrac2Str (char *value, uint64_t sec, uint64_t nsec)

Detailed Description

Copyright: SPDX-FileCopyrightText: 2026 European Southern Observatory (ESO) SPDX-License-Identifier: LGPL-3.0-only

Macro Definition Documentation

◆ _GNU_SOURCE

#define _GNU_SOURCE

◆ _REENTRANT

#define _REENTRANT

Function Documentation

◆ ngcbAddSec()

void ngcbAddSec	(	struct timeval *	t,
		double	seconds )

Add seconds to a time-stamp values. The value of seconds may be both positive or negative (or zero).

◆ ngcbAddTime()

void ngcbAddTime	(	struct timeval	t1,
		struct timeval	t2,
		struct timeval *	t3 )

Add two time-stamp values and stores the result of (t1 + t2) in t3.

◆ ngcbAddTimeFrac()

void ngcbAddTimeFrac	(	uint64_t *	sec,
		uint64_t *	nsec,
		double	t )

Add time (in seconds) to a fraction value (48 bit seconds and 30 bit nanoseconds + 16 bit fraction of nanoseconds).

◆ ngcbGetMJD()

double ngcbGetMJD ( void )

Get the current time as Modified Julian Date.

◆ ngcbGetTime()

int ngcbGetTime ( struct timeval * t )

Store a time-stamp.

◆ ngcbGetUTC()

int ngcbGetUTC	(	char *	utc,
		int	precision )

Get the UTC in ISO format. If precision is greater than zero, then a fraction of seconds with precision digits is appended.

◆ ngcbMicroSleep()

int ngcbMicroSleep	(	int	fd,
		int	waitTime )

Suspend process execution for waitTime microseconds. The sleep can be interrupted by writing to the file descriptor fd which will be closed in that case. If fd has a negative value then the sleep cannot be interrupted.

◆ ngcbMJD2UTC()

void ngcbMJD2UTC	(	double	mjd,
		char *	utc,
		int	precision )

Convert a Modified Julian Date into UTC in ISO format. If precision is greater than zero, then a fraction of seconds with precision digits is appended.

◆ ngcbSleep()

int ngcbSleep	(	int	fd,
		int	waitTime )

Suspend process execution for waitTime seconds. The sleep can be interrupted by writing to fd which will be closed in that case. If the termSock has a negative value, the sleep cannot be interrupted.

◆ ngcbSubTime()

void ngcbSubTime	(	struct timeval	t1,
		struct timeval	t2,
		struct timeval *	t3 )

Subtracts two time-stamp values and stores the result of (t2 - t1) in t3.

◆ ngcbTaiOffset()

int ngcbTaiOffset ( )

Get TAI offset (seconds)

◆ ngcbTime2MJD()

double ngcbTime2MJD ( struct timeval t )

Return the Modified Julian Date of a time-stamp.

◆ ngcbTime2UTC()

void ngcbTime2UTC	(	struct timeval	t,
		char *	utc,
		int	precision )

Convert the time-stamp into ISO-format. If precision is greater than zero, then a fraction of seconds with precision digits is appended.

◆ ngcbTimeFrac2Str()

void ngcbTimeFrac2Str	(	char *	value,
		uint64_t	sec,
		uint64_t	nsec )

Convert a time given in seconds and 30 bit nanoseconds + 16 bit fraction of nanoseconds to a string representing seconds in a high precision floating point number.

◆ ngcbUTC2MJD()

double ngcbUTC2MJD ( const char * utc )

Convert an UTC time string in ISO format into Modified Julian Date format. A return value of 0.0 indicates a conversion error.

Macros

Functions