56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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#ifndef _OBLIST_H_
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#define _OBLIST_H_
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// class COBNODE;
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#define POSITION COBNODE*
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struct COBNODE
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{
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POSITION pNext;
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void* pItem;
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};
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class COBLIST
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{
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protected:
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POSITION m_pHead;
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POSITION m_pTail;
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virtual BOOL Compare(void* pItemToCompare, void* pComparator)
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{return(pItemToCompare == pComparator);};
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public:
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COBLIST() : m_pHead(NULL), m_pTail(NULL) { };
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POSITION GetHeadPosition() { return(m_pHead); };
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POSITION GetTailPosition() { return(m_pTail); };
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virtual void * RemoveAt(POSITION rPos);
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virtual void * ReplaceAt(POSITION rPos, void* pNewItem)
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{
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void *pvoid = rPos->pItem;
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rPos->pItem = pNewItem;
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return(pvoid);
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}
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POSITION AddTail(void* pItem);
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BOOL IsEmpty() { return(!m_pHead); };
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void * GetTail();
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void * GetNext(POSITION& rPos);
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void * SafeGetFromPosition(POSITION rPos);
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POSITION GetPosition(void* pItem);
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POSITION Lookup(void* pComparator);
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void EmptyList();
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virtual ~COBLIST();
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#ifdef DEBUG
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void * GetHead();
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void * RemoveHead();
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// void * RemoveTail(); // inefficient
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void * GetFromPosition(POSITION rPos);
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#else
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void * GetHead(){return GetFromPosition(GetHeadPosition());};
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void * RemoveHead() { return RemoveAt(m_pHead); };
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// void * RemoveTail() { return RemoveAt(m_pTail); }; // inefficient
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void * GetFromPosition(POSITION rPos){return(rPos->pItem);};
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#endif
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};
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#endif // ndef _OBLIST_H_
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