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/**
* @file lldlinked.h
* @brief Declaration of the LLDLinked class.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#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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