casacore::IPosition_global_functions_IPosition_Indexing Struct Reference

Indexing functions for IPosition's Convert between IPosition and offset in an array. More...

#include <IPosition.h>

Public Member Functions
IPosition	toIPositionInArray (long long offset, const IPosition &shape)
	Convert from offset to IPosition in an array. More...
long long	toOffsetInArray (const IPosition &iposition, const IPosition &shape)
	Convert from IPosition to offset in an array. More...
bool	isInsideArray (const long long offset, const IPosition &shape)
	Determine if the given offset or IPosition is inside the array. More...
bool	isInsideArray (const IPosition &iposition, const IPosition &shape)

Detailed Description

Indexing functions for IPosition's Convert between IPosition and offset in an array.

The offset of an element in an array is the number of elements from the origin that the element would be if the array were arranged linearly. The origin of the array has an offset equal to 0, while the "top right corner" of the array has an offset equal to one less than the total number of elements in the array.

Two examples of offset would be the index in a carray and the seek position in a file.

Definition at line 537 of file IPosition.h.

Member Function Documentation

bool casacore::IPosition_global_functions_IPosition_Indexing::isInsideArray	(	const long long	offset,
		const IPosition &	shape
	)

Determine if the given offset or IPosition is inside the array.

Returns true if it is inside the Array.

Thrown Exceptions

• ArrayConformanceError: If all the IPositions are not the same length

bool casacore::IPosition_global_functions_IPosition_Indexing::isInsideArray	(	const IPosition &	iposition,
		const IPosition &	shape
	)

IPosition casacore::IPosition_global_functions_IPosition_Indexing::toIPositionInArray	(	long long	offset,
		const IPosition &	shape
	)

Convert from offset to IPosition in an array.

long long casacore::IPosition_global_functions_IPosition_Indexing::toOffsetInArray	(	const IPosition &	iposition,
		const IPosition &	shape
	)

Convert from IPosition to offset in an array.

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

• casa/Arrays/IPosition.h