mirror of
https://github.com/DrBeef/JKXR.git
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4597b03873
Opens in Android Studio but haven't even tried to build it yet (it won't.. I know that much!)
334 lines
10 KiB
C++
334 lines
10 KiB
C++
/*
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===========================================================================
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Copyright (C) 2000 - 2013, Raven Software, Inc.
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Copyright (C) 2001 - 2013, Activision, Inc.
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Copyright (C) 2013 - 2015, OpenJK contributors
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This file is part of the OpenJK source code.
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OpenJK is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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===========================================================================
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*/
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////////////////////////////////////////////////////////////////////////////////////////
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// RAVEN STANDARD TEMPLATE LIBRARY
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// (c) 2002 Activision
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//
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//
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// Heap
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// ------
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//
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//
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//
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//
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// TODO:
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//
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//
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// NOTES:
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//
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined(RATL_HEAP_VS_INC)
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#define RATL_HEAP_VS_INC
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////////////////////////////////////////////////////////////////////////////////////////
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// Includes
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined(RATL_COMMON_INC)
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#include "ratl_common.h"
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#endif
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namespace ratl
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{
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////////////////////////////////////////////////////////////////////////////////////////
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// The Vector Class
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////////////////////////////////////////////////////////////////////////////////////////
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template<class T>
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class heap_base : public ratl_base
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{
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public:
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typedef typename T TStorageTraits;
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typedef typename T::TValue TTValue;
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////////////////////////////////////////////////////////////////////////////////////
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// Capacity Enum
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////////////////////////////////////////////////////////////////////////////////////
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static const int CAPACITY = T::CAPACITY;
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////////////////////////////////////////////////////////////////////////////////////
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// Data
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////////////////////////////////////////////////////////////////////////////////////
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private:
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array_base<TStorageTraits> mData; // The Memory
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int mPush; // Address Of Next Add Location
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////////////////////////////////////////////////////////////////////////////////////
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// Returns The Location Of Node (i)'s Parent Node (The Parent Node Of Zero Is Zero)
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////////////////////////////////////////////////////////////////////////////////////
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static int parent(int i)
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{
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return ((i-1)/2);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Returns The Location Of Node (i)'s Left Child (The Child Of A Leaf Is The Leaf)
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////////////////////////////////////////////////////////////////////////////////////
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static int left(int i)
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{
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return (2*i)+1;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Returns The Location Of Node (i)'s Right Child (The Child Of A Leaf Is The Leaf)
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////////////////////////////////////////////////////////////////////////////////////
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static int right(int i)
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{
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return (2*i)+2;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Returns The Location Of Largest Child Of Node (i)
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////////////////////////////////////////////////////////////////////////////////////
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int largest_child(int i) const
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{
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if (left(i)<mPush)
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{
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if (right(i)<mPush)
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{
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return ( (mData[right(i)] < mData[left(i)]) ? (left(i)) : (right(i)) );
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}
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return left(i); // Node i only has a left child, so by default it is the biggest
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}
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return i; // Node i is a leaf, so just return it
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Swaps Two Element Locations
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////////////////////////////////////////////////////////////////////////////////////
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void swap(int a, int b)
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{
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if (a==b)
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{
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return;
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}
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assert(a>=0 && b>=0 && a<CAPACITY && b<CAPACITY);
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mData.swap(a,b);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Swaps The Data Up The Heap Until It Reaches A Valid Location
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////////////////////////////////////////////////////////////////////////////////////
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void reheapify_upward(int Pos)
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{
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while (Pos && mData[parent(Pos)]<mData[Pos])
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{
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swap(parent(Pos), Pos);
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Pos = parent(Pos);
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}
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Swaps The Data Down The Heap Until It Reaches A Valid Location
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////////////////////////////////////////////////////////////////////////////////////
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void reheapify_downward(int Pos)
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{
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int largestChild = largest_child(Pos);
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while (largestChild!=Pos && mData[Pos]<mData[largestChild])
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{
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swap(largestChild, Pos);
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Pos = largestChild;
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largestChild = largest_child(Pos);
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}
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Validate Will Run Through The Heap And Make Sure The Top Element Is Smallest
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////////////////////////////////////////////////////////////////////////////////////
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bool valid()
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{
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for (int i=1; i<mPush; i++)
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{
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if (mData[0]<mData[i])
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{
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return false;
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}
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}
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return true;
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}
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public:
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////////////////////////////////////////////////////////////////////////////////////
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// Constructor
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////////////////////////////////////////////////////////////////////////////////////
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heap_base() : mPush(0)
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{
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get The Size (The Difference Between The Push And Pop "Pointers")
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////////////////////////////////////////////////////////////////////////////////////
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int size() const
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{
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return mPush;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check To See If The Size Is Zero
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////////////////////////////////////////////////////////////////////////////////////
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bool empty() const
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{
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return !size();
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check To See If The Size Is Full
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////////////////////////////////////////////////////////////////////////////////////
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bool full() const
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{
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return size()==CAPACITY;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Empty Out The Entire Heap
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////////////////////////////////////////////////////////////////////////////////////
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void clear()
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{
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mPush = 0;
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mData.clear();
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get The Data Value At The Top Of The Heap
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////////////////////////////////////////////////////////////////////////////////////
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const TTValue & top() const
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{
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assert(mPush>0); // Don't Try To Look At This If There Is Nothing In Here
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return mData[0];
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Add A Value To The Queue
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////////////////////////////////////////////////////////////////////////////////////
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void push(const TTValue& nValue)
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{
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assert(size()<CAPACITY);
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// Add It
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//--------
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mData.construct(mPush,nValue);
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// Fix Possible Heap Inconsistancies
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//-----------------------------------
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reheapify_upward(mPush);
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mPush++;
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assert(valid());
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Alloc A Value, call push_alloced to add
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////////////////////////////////////////////////////////////////////////////////////
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TTValue& alloc()
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{
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assert(size()<CAPACITY);
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// Add It
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//--------
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mData.construct(mPush);
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return mData[mPush];
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Alloc A Raw Value for placement new, call push_alloced to add
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////////////////////////////////////////////////////////////////////////////////////
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TRatlNew * alloc_raw()
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{
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assert(size()<CAPACITY);
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return mData.alloc_raw(mPush);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Add A Value To The Queue, after filling an alloced slot
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////////////////////////////////////////////////////////////////////////////////////
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void push_alloced()
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{
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assert(size()<CAPACITY);
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// Fix Possible Heap Inconsistancies
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//-----------------------------------
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reheapify_upward(mPush);
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mPush++;
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assert(valid());
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Remove A Value From The Queue
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////////////////////////////////////////////////////////////////////////////////////
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void pop()
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{
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assert(size()>0);
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mPush--;
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// Swap The Lowest Element Up To The Spot We Just "Erased"
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//---------------------------------------------------------
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swap(0, mPush);
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mData.destruct(mPush);
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// Fix Possible Heap Inconsistancies
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//-----------------------------------
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reheapify_downward(0);
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assert(valid());
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}
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};
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template<class T, int ARG_CAPACITY>
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class heap_vs : public heap_base<storage::value_semantics<T,ARG_CAPACITY> >
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{
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public:
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typedef typename storage::value_semantics<T,ARG_CAPACITY> TStorageTraits;
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typedef typename TStorageTraits::TValue TTValue;
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static const int CAPACITY = ARG_CAPACITY;
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heap_vs() {}
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};
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template<class T, int ARG_CAPACITY>
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class heap_os : public heap_base<storage::object_semantics<T,ARG_CAPACITY> >
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{
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public:
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typedef typename storage::object_semantics<T,ARG_CAPACITY> TStorageTraits;
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typedef typename TStorageTraits::TValue TTValue;
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static const int CAPACITY = ARG_CAPACITY;
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heap_os() {}
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};
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template<class T, int ARG_CAPACITY, int ARG_MAX_CLASS_SIZE>
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class heap_is : public heap_base<storage::virtual_semantics<T,ARG_CAPACITY,ARG_MAX_CLASS_SIZE> >
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{
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public:
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typedef typename storage::virtual_semantics<T,ARG_CAPACITY,ARG_MAX_CLASS_SIZE> TStorageTraits;
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typedef typename TStorageTraits::TValue TTValue;
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static const int CAPACITY = ARG_CAPACITY;
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static const int MAX_CLASS_SIZE = ARG_MAX_CLASS_SIZE;
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heap_is() {}
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};
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}
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#endif
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