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Hoist MOULOpenSourceClientPlugin/Plasma20/* to top level
to match H'uru layout and make patching/cherry-picking easier.
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199
Sources/Plasma/CoreLib/hsHashTable.h
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199
Sources/Plasma/CoreLib/hsHashTable.h
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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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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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Additional permissions under GNU GPL version 3 section 7
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If you modify this Program, or any covered work, by linking or
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
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(or a modified version of those libraries),
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
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licensors of this Program grant you additional
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permission to convey the resulting work. Corresponding Source for a
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non-source form of such a combination shall include the source code for
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
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work.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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// hsHashTable.h
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#ifndef _hsHashTable_Included_
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#define _hsHashTable_Included_
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#include "hsTemplates.h"
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template <class T>
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class hsHashTableIterator
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{
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public:
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hsHashTableIterator() : fList(nil), fIndex(-1) { }
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explicit hsHashTableIterator(hsTArray<T>* list, UInt32 idx) : fList(list), fIndex(idx) { }
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T* operator->() const { return &((*fList)[fIndex]); }
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T& operator*() const { return (*fList)[fIndex]; }
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hsHashTableIterator<T>& operator++() { fIndex--; return *this; }
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const hsHashTableIterator<T>& operator++(int) { hsHashTableIterator<T> temp(*this); --(*this); return temp; }
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hsHashTableIterator<T>& operator--() { fIndex++; return *this; }
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const hsHashTableIterator<T>& operator--(int) { hsHashTableIterator<T> temp(*this); ++(*this); return temp; }
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hsBool operator==(const hsHashTableIterator<T>& other) const { return fList==other.fList && fIndex==other.fIndex; }
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hsBool operator!=(const hsHashTableIterator<T>& other) const { return !(*this == other); }
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private:
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hsTArray<T>* fList;
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UInt32 fIndex;
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};
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template <class T>
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class hsHashTable
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{
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public:
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hsHashTable(UInt32 size=150001, UInt32 step=1);
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~hsHashTable();
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typedef hsHashTableIterator<T> iterator;
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iterator begin() { return iterator(&fItemList,fItemList.Count()-1); }
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iterator end() { return iterator(&fItemList,0); }
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void clear();
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UInt32 count() { return fItemList.Count()-1; }
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UInt32 size() { return fSize; }
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UInt32 CollisionCount() { return fCollisionCount; }
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inline void insert(T& item);
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inline void erase(T& item);
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inline iterator find(const T& item);
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iterator GetItem(UInt32 i);
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private:
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hsTArray<T> fItemList;
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hsTArray<UInt32> fClearList;
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UInt32* fHashTable;
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UInt32 fSize;
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UInt32 fCollisionStep;
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UInt32 fCollisionCount;
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// No copy or assignment
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hsHashTable(const hsHashTable&);
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hsHashTable &operator=(const hsHashTable&);
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};
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template <class T>
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hsHashTable<T>::hsHashTable(UInt32 size, UInt32 step) :
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fSize(size),
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fCollisionStep(step),
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fCollisionCount(0)
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{
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fItemList.SetCount(1);
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fHashTable = TRACKED_NEW UInt32[fSize];
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memset(fHashTable,0,fSize*sizeof(UInt32));
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}
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template <class T>
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hsHashTable<T>::~hsHashTable()
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{
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delete [] fHashTable;
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}
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template <class T>
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void hsHashTable<T>::clear()
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{
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fItemList.SetCount(1);
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for (Int32 i=0; i<fClearList.Count(); i++)
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fHashTable[ fClearList[i] ] = 0;
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fClearList.Reset();
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}
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template <class T>
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void hsHashTable<T>::insert(T& item)
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{
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hsAssert(fClearList.Count() < fSize,"Hash table overflow! Increase the table size.");
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UInt32 h = item.GetHash();
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h %= fSize;
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while (UInt32 it = fHashTable[h])
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{
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if ( fItemList[it] == item)
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{
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fItemList[it] = item;
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return;
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}
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h += fCollisionStep;
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h %= fSize;
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fCollisionCount++;
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}
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fHashTable[h] = fItemList.Count();
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fItemList.Append(item);
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fClearList.Append(h);
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}
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template <class T>
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void hsHashTable<T>::erase(T& item)
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{
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UInt32 h = item.GetHash();
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h %= fSize;
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while (UInt32 it = fHashTable[h])
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{
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if ( fItemList[it] == item )
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{
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fHashTable[h] = 0;
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return;
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}
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}
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}
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template <class T>
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hsHashTableIterator<T> hsHashTable<T>::find(const T& item)
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{
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UInt32 h = item.GetHash();
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h %= fSize;
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while (UInt32 it = fHashTable[h])
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{
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if ( fItemList[it] == item )
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{
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return iterator(&fItemList,it);
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}
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h += fCollisionStep;
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h %= fSize;
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fCollisionCount++;
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}
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return end();
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}
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template <class T>
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hsHashTableIterator<T> hsHashTable<T>::GetItem(UInt32 i)
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{
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return iterator(&fItemList,i+1);
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}
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#endif // _hsHashTable_Included_
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