100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/**
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* @file lldlinked.h
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* @brief Declaration of the LLDLinked class.
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLDLINKED_H
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#define LL_LLDLINKED_H
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template <class Type> class LLDLinked
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{
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LLDLinked* mNextp;
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LLDLinked* mPrevp;
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public:
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Type* getNext() { return (Type*)mNextp; }
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Type* getPrev() { return (Type*)mPrevp; }
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Type* getFirst() { return (Type*)mNextp; }
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void init()
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{
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mNextp = mPrevp = NULL;
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}
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void unlink()
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{
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if (mPrevp) mPrevp->mNextp = mNextp;
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if (mNextp) mNextp->mPrevp = mPrevp;
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}
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LLDLinked() { mNextp = mPrevp = NULL; }
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virtual ~LLDLinked() { unlink(); }
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virtual void deleteAll()
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{
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Type *curp = getFirst();
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while(curp)
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{
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Type *nextp = curp->getNext();
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curp->unlink();
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delete curp;
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curp = nextp;
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}
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}
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void relink(Type &after)
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{
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LLDLinked *afterp = (LLDLinked*)&after;
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afterp->mPrevp = this;
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mNextp = afterp;
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}
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virtual void append(Type& after)
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{
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LLDLinked *afterp = (LLDLinked*)&after;
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afterp->mPrevp = this;
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afterp->mNextp = mNextp;
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if (mNextp) mNextp->mPrevp = afterp;
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mNextp = afterp;
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}
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virtual void insert(Type& before)
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{
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LLDLinked *beforep = (LLDLinked*)&before;
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beforep->mNextp = this;
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beforep->mPrevp = mPrevp;
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if (mPrevp) mPrevp->mNextp = beforep;
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mPrevp = beforep;
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}
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virtual void put(Type& obj) { append(obj); }
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};
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#endif
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