зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
3.0 KiB
C++
94 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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