A class for high precision time. More...

#include <MVEpoch.h>

Inheritance diagram for casacore::MVEpoch:

Public Member Functions
	MVEpoch ()
	Default constructor, generates default 0 epoch. More...

	MVEpoch (const MVEpoch &other)
	Copy constructor. More...

	MVEpoch (Double inday, Double infrac=0)
	Constructor with time in days. More...

	MVEpoch (const Vector< Double > &inday)

	MVEpoch (const Quantity &in)
	Constructor with Quantities. More...

	MVEpoch (const Quantity &in1, const Quantity &in2)

	MVEpoch (const Quantum< Vector< Double > > &in)

	MVEpoch (const Vector< Quantity > &in)

	~MVEpoch ()

MVEpoch &	operator= (const MVEpoch &other)
	Copy assignment. More...

MVEpoch &	operator+= (const MVEpoch &other)
	Add times. More...

MVEpoch	operator+ (const MVEpoch &other) const

MVEpoch &	operator-= (const MVEpoch &other)
	Difference times. More...

MVEpoch	operator- (const MVEpoch &other) const

Bool	operator== (const MVEpoch &other) const
	Comparisons. More...

Bool	operator!= (const MVEpoch &other) const

Bool	near (const MVEpoch &other, Double tol=1e-13) const

Bool	nearAbs (const MVEpoch &other, Double tol=1e-13) const

virtual void	adjust ()
	Adjust the time to its constituent parts. More...

virtual void	adjust (Double &res)
	Adjust value and return a normalisation value. More...

Double	get () const
	Get value in days. More...

Quantity	getTime () const
	Get value with units. More...

Quantity	getTime (const Unit &unit) const

Double	getDay () const
	Get value of integer days. More...

Double	getDayFraction () const
	Get fraction of days. More...

virtual void	print (ostream &os) const
	Print a value. More...

virtual MeasValue *	clone () const
	Clone a value. More...

virtual Vector< Double >	getVector () const
	Get the value in internal units. More...

virtual void	putVector (const Vector< Double > &in)
	Set the value from internal units (set 0 for empty vector) More...

virtual Vector< Quantum< Double > >	getRecordValue () const
	Get the internal value as a `Vector<Quantity>`. More...

virtual Bool	putValue (const Vector< Quantum< Double > > &in)
	Set the internal value if correct values and dimensions. More...

Public Member Functions inherited from casacore::MeasValue
void	dummy_constr () const
	Each derived class should have at least the following constructors: More...

virtual	~MeasValue ()
	Destructor. More...

void	dummy_operator () const
	The following operators should be present at least. More...

virtual Vector< Quantum< Double > >	getXRecordValue () const

virtual Vector< Quantum< Double > >	getTMRecordValue () const

virtual void	readjust (Double val)
	Re-adjust, i.e. More...

Static Public Member Functions
static void	assure (const MeasValue &in)
	Tell me your type. More...

Static Public Attributes
static const Double	secInDay
	Constants. More...

static const Unit	unitDay

Private Member Functions
Double	makeDay (const Quantity &in) const
	Make days from quantity. More...

void	addTime (Double in)
	Add time from days. More...

Private Attributes
Double	wday
	Whole days Note that if higher precision is needed, the splitting could be in 0.001 days and fractions thereof. More...

Double	frday
	Fraction of days. More...

Detailed Description

A class for high precision time.

Intended use:

Public interface

Review Status

Reviewed By:: tcornwel
Date Reviewed:: 1996/02/22
Test programs:: tMeasMath

Prerequisite

MeasValue class

Etymology

MVEpoch from Measure, Value and Epoch

Synopsis

MVEpoch is a class for high precision (10^-16 s) epochs over a period of 6*10¹⁰ a.
MVEpochs can be compared, a time interval can be added or subtracted, and the time difference can be found. The following constructors:

MVEpoch() default; assuming 0
MVEpoch(Double) with time given in days
MVEpoch(Double, Double=0) with times given in days
MVEpoch(Quantity, Quantity=0) with times given
MVEpoch(Quantum<Vector<Double> >) with times given
MVEpoch(Vector<Double>) with times in days
MVEpoch(Vector<Quantity>) with times

Example

See MEpoch

Motivation

To have high precision timing

To Do

A proper high precision time, including multiplication etc should be considered. E.g. a multi-byte number with 6 bytes day and 8 bytes fractional day.

Definition at line 90 of file MVEpoch.h.

Constructor & Destructor Documentation

casacore::MVEpoch::MVEpoch ( )

Default constructor, generates default 0 epoch.

casacore::MVEpoch::MVEpoch ( const MVEpoch & other )

Copy constructor.

casacore::MVEpoch::MVEpoch	(	Double	inday,
		Double	infrac = `0`
	)

Constructor with time in days.

casacore::MVEpoch::MVEpoch ( const Vector< Double > & inday )

casacore::MVEpoch::MVEpoch ( const Quantity & in )

Constructor with Quantities.

casacore::MVEpoch::MVEpoch	(	const Quantity &	in1,
		const Quantity &	in2
	)

casacore::MVEpoch::MVEpoch ( const Quantum< Vector< Double > > & in )

casacore::MVEpoch::MVEpoch ( const Vector< Quantity > & in )

casacore::MVEpoch::~MVEpoch ( )

Member Function Documentation

void casacore::MVEpoch::addTime ( Double in )

private

Add time from days.

virtual void casacore::MVEpoch::adjust ( )

virtual

Adjust the time to its constituent parts.

The returned result is always 1.0

Reimplemented from casacore::MeasValue.

virtual void casacore::MVEpoch::adjust ( Double & val )

virtual

Adjust value and return a normalisation value.

Reimplemented from casacore::MeasValue.

static void casacore::MVEpoch::assure ( const MeasValue & in )

static

Tell me your type.

virtual MeasValue* casacore::MVEpoch::clone ( ) const

virtual

Clone a value.

Implements casacore::MeasValue.

Double casacore::MVEpoch::get ( ) const

Get value in days.

Double casacore::MVEpoch::getDay ( ) const

Get value of integer days.

Double casacore::MVEpoch::getDayFraction ( ) const

Get fraction of days.

virtual Vector<Quantum<Double> > casacore::MVEpoch::getRecordValue ( ) const

virtual

Get the internal value as a Vector<Quantity>.

Usable in records. The getXRecordValue() gets additional information for records. Note that the Vectors could be empty.

Implements casacore::MeasValue.

Quantity casacore::MVEpoch::getTime ( ) const

Get value with units.

Quantity casacore::MVEpoch::getTime ( const Unit & unit ) const

virtual Vector<Double> casacore::MVEpoch::getVector ( ) const

virtual

Get the value in internal units.

Implements casacore::MeasValue.

Double casacore::MVEpoch::makeDay ( const Quantity & in ) const

private

Make days from quantity.

Bool casacore::MVEpoch::near	(	const MVEpoch &	other,
		Double	tol = `1e-13`
	)		const

Bool casacore::MVEpoch::nearAbs	(	const MVEpoch &	other,
		Double	tol = `1e-13`
	)		const

Bool casacore::MVEpoch::operator!= ( const MVEpoch & other ) const

MVEpoch casacore::MVEpoch::operator+ ( const MVEpoch & other ) const

MVEpoch& casacore::MVEpoch::operator+= ( const MVEpoch & other )

Add times.

MVEpoch casacore::MVEpoch::operator- ( const MVEpoch & other ) const

MVEpoch& casacore::MVEpoch::operator-= ( const MVEpoch & other )

Difference times.

MVEpoch& casacore::MVEpoch::operator= ( const MVEpoch & other )

Copy assignment.

Bool casacore::MVEpoch::operator== ( const MVEpoch & other ) const

Comparisons.

virtual void casacore::MVEpoch::print ( ostream & os ) const

virtual

Print a value.

Implements casacore::MeasValue.

virtual Bool casacore::MVEpoch::putValue ( const Vector< Quantum< Double > > & in )

virtual

Set the internal value if correct values and dimensions.

Implements casacore::MeasValue.

virtual void casacore::MVEpoch::putVector ( const Vector< Double > & in )

virtual

Set the value from internal units (set 0 for empty vector)

Implements casacore::MeasValue.

Member Data Documentation

Double casacore::MVEpoch::frday

private

Fraction of days.

Definition at line 198 of file MVEpoch.h.

const Double casacore::MVEpoch::secInDay

static

Constants.

Definition at line 143 of file MVEpoch.h.

const Unit casacore::MVEpoch::unitDay

static

Definition at line 144 of file MVEpoch.h.

Double casacore::MVEpoch::wday

private

Whole days Note that if higher precision is needed, the splitting could be in 0.001 days and fractions thereof.

Definition at line 196 of file MVEpoch.h.

The documentation for this class was generated from the following file:

casa/Quanta/MVEpoch.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Intended use:

Review Status

Prerequisite

Etymology

Synopsis

Example

Motivation

To Do

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation