95 lines
2 KiB
C++
95 lines
2 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1999
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//
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// File: cdlink.cxx
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//
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// Contents:
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//
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// Classes: CDlink
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//
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// History: 16-Oct-91 KevinRo Created
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//
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//--------------------------------------------------------------------------
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#include "pch.h"
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//+-------------------------------------------------------------------------
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//
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// Member: CDLink::LinkAfter
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//
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// Purpose: Links this after dlPrev and before dlPrev->_dlNext
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//
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// Returns: this
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//
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// Note: None.
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//
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//--------------------------------------------------------------------------
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VOID CDLink::LinkAfter(CDLink * dlPrev)
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{
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_dlPrev = dlPrev;
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if(dlPrev != NULL)
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{
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_dlNext = dlPrev->_dlNext;
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dlPrev->_dlNext = this;
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if(_dlNext != NULL) {
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_dlNext->_dlPrev = this;
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}
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}
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else
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{
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_dlNext = NULL;
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}
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CDLink::LinkBefore
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//
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// Purpose: Links this Before dlNext and after dlNext->_dlPrev
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//
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// Returns: this
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//
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//--------------------------------------------------------------------------
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VOID CDLink::LinkBefore(CDLink * dlNext)
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{
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_dlNext = dlNext;
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if(dlNext != NULL)
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{
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_dlPrev = dlNext->_dlPrev;
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dlNext->_dlPrev = this;
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if(_dlPrev != NULL) {
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_dlPrev->_dlNext = this;
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}
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}
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else
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{
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_dlPrev = NULL;
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}
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CDLink::Unlink()
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//
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// Purpose: Removes this from double linked list
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//
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// Returns: this
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//
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//--------------------------------------------------------------------------
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VOID CDLink::UnLink()
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{
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if(_dlNext != NULL) {
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_dlNext->_dlPrev = _dlPrev;
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}
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if(_dlPrev != NULL) {
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_dlPrev->_dlNext = _dlNext;
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}
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_dlNext = _dlPrev = NULL;
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}
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