casacore::SortKey Class Reference

Define a Sort key. More...

#include <Sort.h>

Public Member Functions
	SortKey (const void *data, const CountedPtr< BaseCompare > &, uInt increment, int order)
	Define a sort key in a given data array using the indicated comparison object, stride and sort order. More...
	SortKey (const SortKey &)
	Copy constructor (copy semantics). More...
	~SortKey ()
SortKey &	operator= (const SortKey &)
	Assignment (copy semantics). More...
uInt	tryGenSort (Vector< uInt > &indexVector, uInt nrrec, int opt) const
	Try if GenSort can be used for this single key. More...
uInt64	tryGenSort (Vector< uInt64 > &indexVector, uInt64 nrrec, int opt) const
int	order () const
	Get the sort order. More...

Protected Attributes
int	order_p
	sort order; -1 = ascending, 1 = descending More...
const void *	data_p
	address of first data point More...
uInt	incr_p
	increment for next data point More...
CountedPtr< BaseCompare >	ccmpObj_p
	comparison object; use CountedPtr for memory management More...
BaseCompare *	cmpObj_p
	comparison object; use raw pointer for performance More...

Friends
class	Sort

Detailed Description

Define a Sort key.

Intended use:

Internal

Review Status

Reviewed By:

Friso Olnon

Date Reviewed:

1995/03/01

Test programs:

tSort, tSort_1

Synopsis

SortKey is a helper class for the Sort class. It holds the following information about a sort key:

• Address of the data array containing the sort key;
• A CountedPtr to a comparison object to be used (of a class derived from the abstract base class BaseCompare).
• Increment for the next data point – this lets you specify a stride for keys embedded in a struct;
• Sort order – ascending or descending;

Definition at line 60 of file Sort.h.

Constructor & Destructor Documentation

casacore::SortKey::SortKey	(	const void *	data,
		const CountedPtr< BaseCompare > &	,
		uInt	increment,
		int	order
	)

Define a sort key in a given data array using the indicated comparison object, stride and sort order.

casacore::SortKey::SortKey

(

const SortKey &

)

Copy constructor (copy semantics).

casacore::SortKey::~SortKey

(

)

Member Function Documentation

SortKey& casacore::SortKey::operator=

(

const SortKey &

)

Assignment (copy semantics).

int casacore::SortKey::order ( ) const

inline

Get the sort order.

Definition at line 85 of file Sort.h.

References order_p.

uInt casacore::SortKey::tryGenSort	(	Vector< uInt > &	indexVector,
		uInt	nrrec,
		int	opt
	)		const

Try if GenSort can be used for this single key.

If it succeeds, it returns the resulting number of elements. Otherwise it returns 0.

uInt64 casacore::SortKey::tryGenSort	(	Vector< uInt64 > &	indexVector,
		uInt64	nrrec,
		int	opt
	)		const

Friends And Related Function Documentation

friend class Sort

friend

Definition at line 63 of file Sort.h.

Member Data Documentation

CountedPtr<BaseCompare> casacore::SortKey::ccmpObj_p

protected

comparison object; use CountedPtr for memory management

Definition at line 96 of file Sort.h.

BaseCompare* casacore::SortKey::cmpObj_p

protected

comparison object; use raw pointer for performance

Definition at line 98 of file Sort.h.

const void* casacore::SortKey::data_p

protected

address of first data point

Definition at line 92 of file Sort.h.

uInt casacore::SortKey::incr_p

protected

increment for next data point

Definition at line 94 of file Sort.h.

int casacore::SortKey::order_p

protected

sort order; -1 = ascending, 1 = descending

Definition at line 90 of file Sort.h.

Referenced by order().

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

• casa/Utilities/Sort.h