зеркало из https://github.com/mozilla/gecko-dev.git
79 строки
2.1 KiB
C++
79 строки
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsAVLTree_h___
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#define nsAVLTree_h___
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#include "nscore.h"
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enum eAVLStatus {eAVL_unknown,eAVL_ok,eAVL_fail,eAVL_duplicate};
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struct nsAVLNode;
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/**
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*
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* @update gess12/26/98
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* @param anObject1 is the first object to be compared
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* @param anObject2 is the second object to be compared
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* @return -1,0,1 if object1 is less, equal, greater than object2
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*/
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class NS_COM nsAVLNodeComparitor {
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public:
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virtual PRInt32 operator()(void* anItem1,void* anItem2)=0;
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};
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class NS_COM nsAVLNodeFunctor {
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public:
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virtual void* operator()(void* anItem)=0;
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};
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class NS_COM nsAVLTree {
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public:
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nsAVLTree(nsAVLNodeComparitor& aComparitor, nsAVLNodeFunctor* aDeallocator);
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~nsAVLTree(void);
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PRBool operator==(const nsAVLTree& aOther) const;
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PRInt32 GetCount(void) const {return mCount;}
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//main functions...
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eAVLStatus AddItem(void* anItem);
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eAVLStatus RemoveItem(void* anItem);
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void* FindItem(void* anItem) const;
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void ForEach(nsAVLNodeFunctor& aFunctor) const;
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void ForEachDepthFirst(nsAVLNodeFunctor& aFunctor) const;
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void* FirstThat(nsAVLNodeFunctor& aFunctor) const;
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protected:
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nsAVLNode* mRoot;
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PRInt32 mCount;
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nsAVLNodeComparitor& mComparitor;
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nsAVLNodeFunctor* mDeallocator;
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};
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#endif /* nsAVLTree_h___ */
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