CArrayVarBase Class Reference

#include <e32base.h>

class CArrayVarBase : public CBase

Inherits from

CArrayVarBase
- CBase

Public Member Functions
	~CArrayVarBase()
IMPORT_C TAny *	At(TInt)
IMPORT_C void	Compress()
TInt	Count()
IMPORT_C void	Delete(TInt)
IMPORT_C void	Delete(TInt, TInt)
IMPORT_C TAny *	ExpandL(TInt, TInt)
IMPORT_C TInt	Find(const TAny *, TKeyArrayVar &, TInt &)
IMPORT_C TInt	FindIsq(const TAny *, TKeyArrayVar &, TInt &)
IMPORT_C TInt	InsertIsqAllowDuplicatesL(const TAny *, TInt, TKeyArrayVar &)
IMPORT_C TInt	InsertIsqL(const TAny *, TInt, TKeyArrayVar &)
IMPORT_C void	InsertL(TInt, const TAny *, TInt)
IMPORT_C TInt	Length(TInt)
IMPORT_C void	Reset()
IMPORT_C TInt	Sort(TKeyArrayVar &)

Protected Member Functions
	CArrayVarBase(TBufRep, TInt)
IMPORT_C const TAny *	AtR(const CBase *, TInt)
IMPORT_C TInt	CountR(const CBase *)
IMPORT_C void	SetKey(TKeyArrayVar &)

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Detailed Description

An implementation base class for variable length arrays.

It provides implementation and public functions which are common to all variable length type arrays.

The class is always derived from and is never instantiated explicitly.

Constructor & Destructor Documentation

CArrayVarBase ( TBufRep, TInt )

IMPORT_C	CArrayVarBase	(	TBufRep	aRep,
			TInt	aGranularity
		)	[protected]

~CArrayVarBase ( )

IMPORT_C

~CArrayVarBase

(

)

Destructor.

Frees all resources owned by the object, prior to its destruction.

Member Function Documentation

At ( TInt )

IMPORT_C TAny *

(

TInt

anIndex

)

const

AtR ( const CBase *, TInt )

IMPORT_C const TAny *	AtR	(	const CBase *	aPtr,
			TInt	anIndex
		)	[protected, static]

Compress ( )

IMPORT_C void

Compress

(

)

Removes excess space from the array buffer.

The effect is to reduce the memory allocated to the array buffer so that it is just sufficient to represent the array. This applies to both flat and segmented array buffers.

If the array is empty, then the memory allocated to the array buffer is freed.

Count ( )

TInt

Count

(

)

const [inline]

Gets the number of elements held in the array.

Returns: The number of array elements.

CountR ( const CBase * )

IMPORT_C TInt

CountR

(

const CBase *

aPtr

)

[protected, static]

Delete ( TInt )

IMPORT_C void

Delete

(

TInt

anIndex

)

Removes one element from the array.

Deleting elements from the array does not cause the array buffer to be automatically compressed. Call CArrayVarBase::Compress() to return excess space to the heap.

panic: E32USER-CBase 21, if anIndex is negative or greater than the number of elements currently in the array.

Parameter	Description
anIndex	The position within the array of the element to delete. The position is relative to zero.

Delete ( TInt, TInt )

IMPORT_C void	Delete	(	TInt	anIndex,
			TInt	aCount
		)

Removes one or more contiguous elements from the array, starting at the specified position.

Deleting elements from the array does not cause the array buffer to be automatically compressed. Call CArrayVarBase::Compress() to return excess space to the heap.

panic: E32USER-CBase 21, if anIndex is negative or greater than or equal to the number of elements currently in the array.

panic: E32USER-CBase 25, if aCount is negative.

panic: E32USER-CBase 29, if the sum of anIndexPos and aCount is greater than the number of elements currently in the array.

Parameter	Description
anIndex	The position within the array from where deletion of elements is to start. The position is relative to zero, i.e. zero implies that elements, starting with the first, are deleted from the array.
aCount	The number of elements to be deleted from the array.

ExpandL ( TInt, TInt )

IMPORT_C TAny *	ExpandL	(	TInt	anIndex,
			TInt	aLength
		)

Find ( const TAny *, TKeyArrayVar &, TInt & )

IMPORT_C TInt	Find	(	const TAny *	aPtr,
			TKeyArrayVar &	aKey,
			TInt &	anIndex
		)	const

FindIsq ( const TAny *, TKeyArrayVar &, TInt & )

IMPORT_C TInt	FindIsq	(	const TAny *	aPtr,
			TKeyArrayVar &	aKey,
			TInt &	anIndex
		)	const

InsertIsqAllowDuplicatesL ( const TAny *, TInt, TKeyArrayVar & )

IMPORT_C TInt	InsertIsqAllowDuplicatesL	(	const TAny *	aPtr,
			TInt	aLength,
			TKeyArrayVar &	aKey
		)

InsertIsqL ( const TAny *, TInt, TKeyArrayVar & )

IMPORT_C TInt	InsertIsqL	(	const TAny *	aPtr,
			TInt	aLength,
			TKeyArrayVar &	aKey
		)

InsertL ( TInt, const TAny *, TInt )

IMPORT_C void	InsertL	(	TInt	anIndex,
			const TAny *	aPtr,
			TInt	aLength
		)

Length ( TInt )

IMPORT_C TInt

Length

(

TInt

anIndex

)

const

Gets the length of a specific element.

panic: E32USER-CBase 21, if anIndex is negative or is greater than the number of elements currently in the array.

Parameter	Description
anIndex	The position of the element within the array. The position is relative to zero, (i.e. the first element in the array is at position 0).

Returns: The length of the element at position anIndex.

Reset ( )

IMPORT_C void

Reset

(

)

Deletes all elements from the array and frees the memory allocated to the array buffer.

As each element of a variable array is contained within its own heap cell, this function has the effect of freeing all such cells.

SetKey ( TKeyArrayVar & )

IMPORT_C void

SetKey

(

TKeyArrayVar &

aKey

)

const [protected]

Sort ( TKeyArrayVar & )

IMPORT_C TInt

Sort

(

TKeyArrayVar &

aKey

)

Sorts the elements of the array into key sequence.

Parameter	Description
aKey	The key object defining the properties of the key.

Returns: KErrNone, if the sort completes successfully. KErrGeneral, if the stack overflows.