A Descriptor of the Long Integer type. More...

#include <AMReX_FabConv.H>

Public Types
enum	Ordering { NormalOrder = 1 , ReverseOrder = 2 }
	An enumeration describing the two orderings that we currently support: NormalOrder and ReverseOrder. Other orderings may be added as AMReX is ported to run on machines with non-standard orderings. More...

Public Member Functions
	IntDescriptor ()=default
	The default constructor. Does not build a proper IntDescriptor. This should only be used when you need to build a generic IntDescriptor in order to be able to read in a specific one from an istream. More...

	IntDescriptor (Long nb, Ordering ordering=NormalOrder)
	Construct a specific IntDescriptor. More...

Ordering	order () const
	Returns the ordering. More...

int	numBytes () const
	Returns the number of bytes. More...

bool	operator== (const IntDescriptor &id) const
	The equality operator. More...

bool	operator!= (const IntDescriptor &id) const
	The inequality operator. More...

Private Attributes
Long	numbytes

Ordering	ord

Friends
std::istream &	operator>> (std::istream &is, IntDescriptor &id)

Detailed Description

A Descriptor of the Long Integer type.

This class is meant to hold all information needed to completely describe the "int" or "Long" type on a machine. To describe an integer both the number of bytes and their ordering, relative to canonical ordering 1 .. sizeof(Long), needs to be specified. This allows us to write out integers in the native format on a machine, and then by also saving the IntDescriptor, we can read them back in on another machine and have enough information to construct the exact same values.

Member Enumeration Documentation

◆ Ordering

enum amrex::IntDescriptor::Ordering

An enumeration describing the two orderings that we currently support: NormalOrder and ReverseOrder. Other orderings may be added as AMReX is ported to run on machines with non-standard orderings.

Enumerator
NormalOrder
ReverseOrder

Constructor & Destructor Documentation

◆ IntDescriptor() [1/2]

amrex::IntDescriptor::IntDescriptor ( )

default

The default constructor. Does not build a proper IntDescriptor. This should only be used when you need to build a generic IntDescriptor in order to be able to read in a specific one from an istream.

◆ IntDescriptor() [2/2]

amrex::IntDescriptor::IntDescriptor	(	Long	nb,
		Ordering	ordering = `NormalOrder`
	)

Construct a specific IntDescriptor.

Member Function Documentation

◆ numBytes()

int amrex::IntDescriptor::numBytes ( ) const

Returns the number of bytes.

◆ operator!=()

bool amrex::IntDescriptor::operator!= ( const IntDescriptor & id ) const

The inequality operator.

◆ operator==()

bool amrex::IntDescriptor::operator== ( const IntDescriptor & id ) const

The equality operator.

◆ order()

IntDescriptor::Ordering amrex::IntDescriptor::order ( ) const

Returns the ordering.

Friends And Related Function Documentation

◆ operator>>

std::istream& operator>>	(	std::istream &	is,
		IntDescriptor &	id
	)

friend

Read in an IntDescriptor from an istream.

Member Data Documentation

◆ numbytes

Long amrex::IntDescriptor::numbytes

private

◆ ord

Ordering amrex::IntDescriptor::ord