76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
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/*===================================================================
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Microsoft Denali
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Microsoft Confidential.
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Copyright 1996 Microsoft Corporation. All Rights Reserved.
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Component: Hash table for Script Manager
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File: DblList.h
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Owner: DGottner
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extremly simple, yet very flexible, linked list manager
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===================================================================*/
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#ifndef DBLLINK_H
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#define DBLLINK_H
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#ifdef LINKTEST
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#define _DEBUG
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#include <assert.h>
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#define Assert assert
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#else
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#include "debug.h"
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#endif
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/* C D b l L i n k
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*
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* This structure contains a set of links suitable for a doubly linked list
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* implementation. Here we actually use it as a circularly linked list -
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* the links are extracted into this file because the list headers are also
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* of this type.
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*/
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class CDblLink
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{
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public:
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CDblLink();
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virtual ~CDblLink();
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// manipulators
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/////
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void UnLink();
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void AppendTo(CDblLink &);
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void PrependTo(CDblLink &);
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// accessors
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/////
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CDblLink *PNext() const;
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CDblLink *PPrev() const;
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// testers
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/////
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bool FIsEmpty() const;
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void AssertValid() const
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{
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#ifdef _DEBUG
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Assert (this == m_pLinkPrev->m_pLinkNext && this == m_pLinkNext->m_pLinkPrev);
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#endif
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}
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private:
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CDblLink *m_pLinkNext, *m_pLinkPrev;
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};
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inline CDblLink::CDblLink() { m_pLinkNext = m_pLinkPrev = this; }
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inline CDblLink::~CDblLink() { UnLink(); }
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inline bool CDblLink::FIsEmpty() const { return this == m_pLinkNext; }
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inline CDblLink *CDblLink::PNext() const { return m_pLinkNext; }
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inline CDblLink *CDblLink::PPrev() const { return m_pLinkPrev; }
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#endif // DBLLINK_H
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