Class TBtreeKey

class TBtreeKey : public MBtreeKey;

Description

Derivation

• MBtreeKey - Interface for ordering and creating keys for entries in a B-tree.

• TBtreeKey - (No abstract)

Members

Defined in TBtreeKey:

• Between(const TAny *,const TAny *,TBtreePivot &)constGets the midpoint between two keys.
• Compare(const TAny *,const TAny *)constOrders two keys.
• Key(const TAny *)constGets the key value for an entry.
• TBtreeKey()
• TBtreeKey(TInt)
• TBtreeKey(TInt,TKeyCmpNumeric)
• TBtreeKey(TInt,TKeyCmpText)
• TBtreeKey(TInt,TKeyCmpText,TInt)
• iCmpType
• iKeyLength
• iKeyOffset

IMPORT_C TBtreeKey();

Description

IMPORT_C TBtreeKey(TInt aLength);

Description

Parameters

IMPORT_C TBtreeKey(TInt anOffset, TKeyCmpText aType);

Description

Parameters

IMPORT_C TBtreeKey(TInt anOffset, TKeyCmpText aType, TInt aLength);

Description

Parameters

IMPORT_C TBtreeKey(TInt anOffset, TKeyCmpNumeric aType);

Description

Parameters

IMPORT_C virtual const TAny* Key(const TAny *anEntry) const;

Description

Gets the key value for an entry.

Parameters

Return value

IMPORT_C virtual TInt Compare(const TAny *aLeft, const TAny *aRight) const;

Description

Orders two keys.

Parameters

Return value

IMPORT_C virtual void Between(const TAny *aLeft, const TAny *aRight, TBtreePivot &aPivot) const;

Description

Gets the midpoint between two keys.

The generated midpoint will be greater or equal to aLeft (by a comparison performed by the TBtreeKey::Compare(const TAny *,const TAny *)const function), and less than aRight.

Parameters

protected: TInt iKeyOffset;

Description

protected: TInt iCmpType;

Description

protected: TInt iKeyLength;

Description