/*++

Copyright (c) 1990  Microsoft Corporation

Module Name:

        sortlit.hxx

Abstract:

    This module contains the declaration for the SORTED_LIST_ITERATOR class.
    SORTED_LIST_ITERATOR is a concrete implementation of the ITERATOR class.

Environment:

        ULIB, User Mode


--*/

#if ! defined( _SORTED_LIST_ITERATOR_ )

#define _SORTED_LIST_ITERATOR_

#include "iterator.hxx"

//
//      Forward references
//
DECLARE_CLASS( SORTED_LIST );
DECLARE_CLASS( SORTED_LIST_ITERATOR );


class SORTED_LIST_ITERATOR : public ITERATOR {

    friend  SORTED_LIST;

        public:

                VIRTUAL
                ~SORTED_LIST_ITERATOR(
                        );

        VIRTUAL
        POBJECT
        FindNext(
            IN  PCOBJECT    Key
            );

                VIRTUAL
                POBJECT
                GetCurrent(
                        );

                VIRTUAL
                POBJECT
                GetNext(
                        );

                VIRTUAL
                POBJECT
                GetPrevious(
                        );

        VIRTUAL
        VOID
        Reset(
            );

        protected:

        DECLARE_CAST_MEMBER_FUNCTION( SORTED_LIST_ITERATOR );
                DECLARE_CONSTRUCTOR( SORTED_LIST_ITERATOR );

        NONVIRTUAL
        BOOLEAN
        Initialize(
            IN OUT  PSORTED_LIST  List
            );

        NONVIRTUAL
        VOID
        Construct(
            );

    private:

        PSORTED_LIST    _List;          //  Sorted List
        ULONG           _CurrentIndex;  //  Current index

};


#endif // _SORTED_LIST_ITERATOR_