Management of lengths in real world units. More...

Collaboration diagram for Length:

Topics
	Demonstrates usage of the ns3::Length class

	Length test suite

Files
file	length.cc
	ns3::Length implementation

file	length.h
	Declaration of ns3::Length class.

Namespaces
namespace	anonymous_namespace{length.cc}
	Unnamed namespace.

Classes
class	ns3::Length
	Represents a length in meters. More...

Functions
int64_t	ns3::Div (const Length &numerator, const Length &denominator, Length *remainder=nullptr)
	Calculate how many times `numerator` can be split into `denominator` sized pieces.

std::optional< Length::Unit >	ns3::FromString (std::string unitString)
	Find the equivalent Length::Unit for a unit string.

Length	ns3::Mod (const Length &numerator, const Length &denominator)
	Calculate the amount remaining after dividing two lengths.

bool	ns3::operator!= (const Length &left, const Length &right)
	Compare two length objects for inequality.

Length	ns3::operator* (const Length &l, double scalar)
	Multiply a length value by a scalar.

Length	ns3::operator* (double scalar, const Length &l)
	Multiply a length value by a scalar.

Length	ns3::operator+ (const Length &left, const Length &right)
	Add two length values together.

Length	ns3::operator- (const Length &left, const Length &right)
	Subtract two length values.

Length	ns3::operator/ (const Length &left, double scalar)
	Divide a length value by a scalar.

double	ns3::operator/ (const Length &numerator, const Length &denominator)
	Divide a length value by another length value.

bool	ns3::operator< (const Length &left, const Length &right)
	Check if `left` has a value less than `right`.

std::ostream &	ns3::operator<< (std::ostream &stream, const Length &l)
	Write a length value to an output stream.

std::ostream &	ns3::operator<< (std::ostream &stream, const Length::Quantity &q)
	Write a Quantity to an output stream.

std::ostream &	ns3::operator<< (std::ostream &stream, Length::Unit unit)
	Write a Length::Unit to an output stream.

bool	ns3::operator<= (const Length &left, const Length &right)
	Check if `left` has a value less than or equal to `right`.

bool	ns3::operator== (const Length &left, const Length &right)
	Compare two length objects for equality.

bool	ns3::operator> (const Length &left, const Length &right)
	Check if `left` has a value greater than `right`.

bool	ns3::operator>= (const Length &left, const Length &right)
	Check if `left` has a value greater than or equal to `right`.

std::istream &	ns3::operator>> (std::istream &stream, Length &l)
	Read a length value from an input stream.

std::string	ns3::ToName (Length::Unit unit, bool plural=false)
	Return the name of the supplied unit.

std::string	ns3::ToSymbol (Length::Unit unit)
	Return the symbol of the supplied unit.

Length	ns3::NanoMeters (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::MicroMeters (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::MilliMeters (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::CentiMeters (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::Meters (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::KiloMeters (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::NauticalMiles (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::Inches (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::Feet (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::Yards (double value)
	Construct a length from a value in the indicated unit.

Length	ns3::Miles (double value)
	Construct a length from a value in the indicated unit.

Detailed Description

Management of lengths in real world units.

Function Documentation

◆ CentiMeters()

Length ns3::CentiMeters ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 794 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ Div()

int64_t ns3::Div	(	const Length &	numerator,
		const Length &	denominator,
		Length *	remainder = nullptr )

Calculate how many times numerator can be split into denominator sized pieces.

If the result of numerator / denominator is not a whole number, the result is rounded toward zero to the nearest whole number. The amount remaining after the division can be retrieved by passing a pointer to a Length in remainder. The remainder will be less than denominator and have the same sign as numerator.

NS_FATAL_ERROR is called if denominator is 0.

Parameters

numerator	The value to split
denominator	The length of each split
remainder	Location to store the remainder

Returns: The number of times numerator can be split into denominator sized pieces, rounded down to the nearest whole number

Definition at line 471 of file length.cc.

References ns3::Length::GetDouble(), and NS_FATAL_ERROR.

Referenced by DivAndMod(), TimeSimpleTestCase::DoTimeOperations(), ns3::Ping::StartApplication(), LengthTestCase::TestDivReturnsCorrectRemainder(), LengthTestCase::TestDivReturnsCorrectResult(), and LengthTestCase::TestDivReturnsZeroRemainder().

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◆ Feet()

Length ns3::Feet ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 824 of file length.cc.

Referenced by DivAndMod(), and LengthTestCase::TestBuilderFreeFunctions().

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◆ FromString()

std::optional< Length::Unit > ns3::FromString ( std::string unitString )

Find the equivalent Length::Unit for a unit string.

The string value can be a symbol or name (plural or singular).

The string comparison ignores case so strings like "NanoMeter", "centiMeter", "METER" will all match the correct unit.

Leading and trailing whitespace are trimmed from the string before searching for a match.

Parameters

unitString String containing the symbol or name of a length unit

Returns: A std::optional object containing a Length::Unit if a match for the string could be found

Definition at line 569 of file length.cc.

Referenced by ns3::Length::Length(), and ns3::Length::TryParse().

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◆ Inches()

Length ns3::Inches ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 818 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ KiloMeters()

Length ns3::KiloMeters ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 806 of file length.cc.

Referenced by LengthValueTestCase::TestAttributeConstructor(), LengthValueTestCase::TestAttributeDeserialization(), LengthValueTestCase::TestAttributeSerialization(), and LengthTestCase::TestBuilderFreeFunctions().

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◆ Meters()

Length ns3::Meters ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 800 of file length.cc.

Referenced by ArithmeticOperators(), EqualityOperators(), and LengthTestCase::TestBuilderFreeFunctions().

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◆ MicroMeters()

Length ns3::MicroMeters ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 782 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ Miles()

Length ns3::Miles ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 836 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ MilliMeters()

Length ns3::MilliMeters ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 788 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ Mod()

Length ns3::Mod	(	const Length &	numerator,
		const Length &	denominator )

Calculate the amount remaining after dividing two lengths.

The returned value will be less than denominator and have the same sign as numerator.

NS_FATAL_ERROR is called if denominator is 0.

Parameters

numerator	The value to split
denominator	The length of each split

Returns: The amount remaining after splitting numerator into denominator sized pieces.

Definition at line 490 of file length.cc.

References ns3::Length::GetDouble(), and NS_FATAL_ERROR.

Referenced by DivAndMod(), LengthTestCase::TestModReturnsNonZero(), and LengthTestCase::TestModReturnsZero().

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◆ NanoMeters()

Length ns3::NanoMeters ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 776 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ NauticalMiles()

Length ns3::NauticalMiles ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 812 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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◆ operator!=()

bool ns3::operator!=	(	const Length &	left,
		const Length &	right )

Compare two length objects for inequality.

Equivalent to:

left.IsNotEqual(right, 0);

Parameters

left	Left length object
right	Right length object

Returns: true if left and right do not have the same value

Definition at line 392 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator*() [1/2]

Length ns3::operator*	(	const Length &	l,
		double	scalar )

Multiply a length value by a scalar.

Multiplies the value l by scalar and returns a new Length object containing the result.

Parameters

l	The Length object
scalar	Multiplication factor

Returns: A newly constructed Length object containing the result of l * scalar.

Definition at line 436 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator*() [2/2]

Length ns3::operator*	(	double	scalar,
		const Length &	l )

Multiply a length value by a scalar.

Multiplies the value l by scalar and returns a new Length object containing the result.

Parameters

l	The Length object
scalar	Multiplication factor

Returns: A newly constructed Length object containing the result of l * scalar.

Definition at line 443 of file length.cc.

◆ operator+()

Length ns3::operator+	(	const Length &	left,
		const Length &	right )

Add two length values together.

Adds the values of left to right and returns a new Length object containing the result.

Parameters

left	A Length object
right	A Length object

Returns: A newly constructed Length object containing the result of left + right.

Definition at line 422 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator-()

Length ns3::operator-	(	const Length &	left,
		const Length &	right )

Subtract two length values.

Subtracts the value of right from left and returns a new Length object containing the result.

Parameters

left	A Length object
right	A Length object

Returns: A newly constructed Length object containing the result of left - right.

Definition at line 429 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator/() [1/2]

Length ns3::operator/	(	const Length &	left,
		double	scalar )

Divide a length value by a scalar.

Divides the value left by scalar and returns a new Length object containing the result.

scalar must contain a non zero value. NS_FATAL_ERROR is called if scalar is zero

Parameters

left	Length value
scalar	Multiplication factor

Returns: A newly constructed Length object containing the result of left / scalar.

Definition at line 449 of file length.cc.

References NS_FATAL_ERROR.

◆ operator/() [2/2]

double ns3::operator/	(	const Length &	numerator,
		const Length &	denominator )

Divide a length value by another length value.

Divides the value numerator by the value denominator and returns a scalar value containing the result.

The return value will be NaN if denominator is 0.

Parameters

numerator	The top value of the division
denominator	The bottom value of the division

Returns: A scalar value that is the result of numerator / denominator or NaN if denominator is 0.

Definition at line 460 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator<()

bool ns3::operator<	(	const Length &	left,
		const Length &	right )

Check if left has a value less than right.

Equivalent to:

left.IsLess(right, 0);

Parameters

left	Left length object
right	Right length object

Returns: true if left is less than right

Definition at line 397 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator<<() [1/3]

std::ostream & ns3::operator<<	(	std::ostream &	stream,
		const Length &	l )

Write a length value to an output stream.

The output of the length is in meters.

Equivalent to:

stream << l.As (Meter);

Parameters

stream	Output stream
l	Length value to write to the stream

Returns: Reference to the output stream

Definition at line 652 of file length.cc.

References ns3::Length::As().

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◆ operator<<() [2/3]

std::ostream & ns3::operator<<	(	std::ostream &	stream,
		const Length::Quantity &	q )

Write a Quantity to an output stream.

The data written to the output stream will have the format <value> <symbol>

Equivalent to:

stream << q.Value () << ' ' << ToSymbol (q.Unit());

ns3::ToSymbol

std::string ToSymbol(Length::Unit unit)

Return the symbol of the supplied unit.

Definition length.cc:503

Parameters

stream	Output stream
q	Quantity to write to the output stream

Returns: Reference to the output stream

Definition at line 660 of file length.cc.

References ToSymbol(), ns3::Length::Quantity::Unit(), and ns3::Length::Quantity::Value().

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◆ operator<<() [3/3]

std::ostream & ns3::operator<<	(	std::ostream &	stream,
		Length::Unit	unit )

Write a Length::Unit to an output stream.

Writes the name of unit to the output stream

Equivalent to:

stream << ToName (unit);

ns3::ToName

std::string ToName(Length::Unit unit, bool plural)

Return the name of the supplied unit.

Definition length.cc:533

Parameters

stream	Output stream
unit	Length unit to output

Returns: Reference to the output stream

Definition at line 668 of file length.cc.

References ToName().

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◆ operator<=()

bool ns3::operator<=	(	const Length &	left,
		const Length &	right )

Check if left has a value less than or equal to right.

Equivalent to:

left.IsLessOrEqual(right, 0);

Parameters

left	Left length object
right	Right length object

Returns: true if left is less than or equal to right

Definition at line 403 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator==()

bool ns3::operator==	(	const Length &	left,
		const Length &	right )

Compare two length objects for equality.

Equivalent to:

left.IsEqual(right, 0);

Parameters

left	Left length object
right	Right length object

Returns: true if left and right have the same value

Definition at line 386 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator>()

bool ns3::operator>	(	const Length &	left,
		const Length &	right )

Check if left has a value greater than right.

Equivalent to:

left.IsGreater(right, 0);

Parameters

left	Left length object
right	Right length object

Returns: true if left is greater than right

Definition at line 410 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator>=()

bool ns3::operator>=	(	const Length &	left,
		const Length &	right )

Check if left has a value greater than or equal to right.

Equivalent to:

left.IsGreaterOrEqual(right, 0);

Parameters

left	Left length object
right	Right length object

Returns: true if left is greater than or equal to right

Definition at line 416 of file length.cc.

References ns3::Length::GetDouble().

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◆ operator>>()

std::istream & ns3::operator>>	(	std::istream &	stream,
		Length &	l )

Read a length value from an input stream.

The expected format of the input is <number> <unit> or <number><unit> This function calls NS_ABORT if the input stream does not contain a valid length string

Parameters

stream	Input stream
l	Object where the deserialized value will be stored

Returns: Reference to the input stream

Definition at line 730 of file length.cc.

References NS_LOG_LOGIC, ParseLengthString(), and ns3::Length::swap().

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◆ ToName()

std::string ns3::ToName	(	Length::Unit	unit,
		bool	plural = false )

Return the name of the supplied unit.

The value returned by this function is the common name of unit. The output is always lowercase.

If plural is true, then the plural form of the common name is returned instead.

Parameters

unit	The unit to name
plural	Boolean indicating if the returned string should contain the plural form of the name

Returns: String containing the full name of unit

Definition at line 533 of file length.cc.

References NS_FATAL_ERROR.

Referenced by operator<<().

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◆ ToSymbol()

std::string ns3::ToSymbol ( Length::Unit unit )

Return the symbol of the supplied unit.

The symbol of the unit is the shortened form of the unit name and is usually two or three characters long

Parameters

unit	The unit to symbolize

Returns: String containing the symbol of unit

Definition at line 503 of file length.cc.

References NS_FATAL_ERROR.

Referenced by operator<<().

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◆ Yards()

Length ns3::Yards ( double value )

Construct a length from a value in the indicated unit.

Parameters

value The numerical value.

Returns: Length object.

Definition at line 830 of file length.cc.

Referenced by LengthTestCase::TestBuilderFreeFunctions().

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Topics

Files

Namespaces

Classes

Functions

Detailed Description

Function Documentation

◆ CentiMeters()

◆ Div()

◆ Feet()

◆ FromString()

◆ Inches()

◆ KiloMeters()

◆ Meters()

◆ MicroMeters()

◆ Miles()

◆ MilliMeters()

◆ Mod()

◆ NanoMeters()

◆ NauticalMiles()

◆ operator!=()

◆ operator*() [1/2]

◆ operator*() [2/2]

◆ operator+()

◆ operator-()

◆ operator/() [1/2]

◆ operator/() [2/2]

◆ operator<()

◆ operator<<() [1/3]

◆ operator<<() [2/3]

◆ operator<<() [3/3]

◆ operator<=()

◆ operator==()

◆ operator>()

◆ operator>=()

◆ operator>>()

◆ ToName()

◆ ToSymbol()

◆ Yards()