97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
/**
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* @file lldepthstack.h
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* @brief Declaration of the LLDepthStack class
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLDEPTHSTACK_H
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#define LL_LLDEPTHSTACK_H
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#include "llstl.h"
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template <class DATA_TYPE> class LLDepthStack
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{
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private:
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std::deque<DATA_TYPE*> mStack;
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U32 mCurrentDepth;
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U32 mMaxDepth;
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public:
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LLDepthStack()
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: mCurrentDepth(0), mMaxDepth(0)
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{}
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void setDepth(U32 depth)
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{
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mMaxDepth = depth;
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}
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U32 getDepth(void) const
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{
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return mCurrentDepth;
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}
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void push(DATA_TYPE *data)
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{
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if (mCurrentDepth < mMaxDepth)
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{
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mStack.push_back(data);
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mCurrentDepth++;
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}
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else
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{
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// the last item falls off stack and is deleted
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if (!mStack.empty())
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{
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mStack.pop_front();
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}
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mStack.push_back(data);
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}
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}
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DATA_TYPE *pop()
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{
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DATA_TYPE *tempp = NULL;
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if (!mStack.empty())
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{
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tempp = mStack.back();
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mStack.pop_back();
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mCurrentDepth--;
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}
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return tempp;
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}
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DATA_TYPE *check()
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{
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return mStack.empty() ? NULL : mStack.back();
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}
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void removeAllNodes()
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{
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mCurrentDepth = 0;
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mStack.clear();
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}
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};
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#endif
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