+ void AddKey (const Clave &k);
+ void DelKey (const Clave &k);
+
+ protected:
+ Clave* AddKeyR (const Clave *k, uint node_num, uint &left_child, uint &right_child);
+
+ void WriteFileHeader ();
+
+ void WriteBlock (uchar *block, uint num);
+ uchar *ReadBlock (uint num);
+ uchar *NewBlock (uint &num);