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/**
* @file lldepthstack.h
* @brief Declaration of the LLDepthStack 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_LLDEPTHSTACK_H
#define LL_LLDEPTHSTACK_H
#include "linked_lists.h"
template <class DATA_TYPE> class LLDepthStack
{
private:
LLLinkedList<DATA_TYPE> mStack;
U32 mCurrentDepth;
U32 mMaxDepth;
public:
LLDepthStack() : mCurrentDepth(0), mMaxDepth(0) {}
~LLDepthStack() {}
void setDepth(U32 depth)
{
mMaxDepth = depth;
}
U32 getDepth(void) const
{
return mCurrentDepth;
}
void push(DATA_TYPE *data)
{
if (mCurrentDepth < mMaxDepth)
{
mStack.addData(data);
mCurrentDepth++;
}
else
{
// the last item falls off stack and is deleted
mStack.getLastData();
mStack.deleteCurrentData();
mStack.addData(data);
}
}
DATA_TYPE *pop()
{
DATA_TYPE *tempp = mStack.getFirstData();
if (tempp)
{
mStack.removeCurrentData();
mCurrentDepth--;
}
return tempp;
}
DATA_TYPE *check()
{
DATA_TYPE *tempp = mStack.getFirstData();
return tempp;
}
void deleteAllData()
{
mCurrentDepth = 0;
mStack.deleteAllData();
}
void removeAllNodes()
{
mCurrentDepth = 0;
mStack.removeAllNodes();
}
};
#endif
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