CArrayVarBase Class Reference

#include <e32base.h>

Link against: euser_v5.lib

class CArrayVarBase : public CBase

Inherits from

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_CCArrayVarBase(TBufRepaRep,
TIntaGranularity
)[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 *At(TIntanIndex)const

AtR ( const CBase *, TInt )

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

Compress ( )

IMPORT_C voidCompress()

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.

Return Value
The number of array elements.

CountR ( const CBase * )

IMPORT_C TIntCountR(const CBase *aPtr)[protected, static]

Delete ( TInt )

IMPORT_C voidDelete(TIntanIndex)

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.

Parameters
anIndexThe position within the array of the element to delete. The position is relative to zero.
Panic Codes
E32USER-CBase21, if anIndex is negative or greater than the number of elements currently in the array.

Delete ( TInt, TInt )

IMPORT_C voidDelete(TIntanIndex,
TIntaCount
)

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.

Parameters
anIndexThe 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.
aCountThe number of elements to be deleted from the array.
Panic Codes
E32USER-CBase21, if anIndex is negative or greater than or equal to the number of elements currently in the array.
E32USER-CBase25, if aCount is negative.
E32USER-CBase29, if the sum of anIndexPos and aCount is greater than the number of elements currently in the array.

ExpandL ( TInt, TInt )

IMPORT_C TAny *ExpandL(TIntanIndex,
TIntaLength
)

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

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

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

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

InsertIsqAllowDuplicatesL ( const TAny *, TInt, TKeyArrayVar & )

IMPORT_C TIntInsertIsqAllowDuplicatesL(const TAny *aPtr,
TIntaLength,
TKeyArrayVar &aKey
)

InsertIsqL ( const TAny *, TInt, TKeyArrayVar & )

IMPORT_C TIntInsertIsqL(const TAny *aPtr,
TIntaLength,
TKeyArrayVar &aKey
)

InsertL ( TInt, const TAny *, TInt )

IMPORT_C voidInsertL(TIntanIndex,
const TAny *aPtr,
TIntaLength
)

Length ( TInt )

IMPORT_C TIntLength(TIntanIndex)const

Gets the length of a specific element.

Parameters
anIndexThe 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).
Return Value
The length of the element at position anIndex.
Panic Codes
E32USER-CBase21, if anIndex is negative or is greater than the number of elements currently in the array.

Reset ( )

IMPORT_C voidReset()

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 voidSetKey(TKeyArrayVar &aKey)const [protected]

Sort ( TKeyArrayVar & )

IMPORT_C TIntSort(TKeyArrayVar &aKey)

Sorts the elements of the array into key sequence.

Parameters
aKeyThe key object defining the properties of the key.
Return Value
KErrNone, if the sort completes successfully. KErrGeneral, if the stack overflows.