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