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Initial commit of Command & Conquer Generals and Command & Conquer Generals Zero Hour source code.

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LFeenanEA
2025-02-27 17:34:39 +00:00
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GeneralsMD/Code/Tools/WW3D/pluglib/hashcalc.h Normal file
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/*
** Command & Conquer Generals Zero Hour(tm)
** Copyright 2025 Electronic Arts Inc.
**
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/***********************************************************************************************
*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
***********************************************************************************************
* *
* Project Name : Westwood Library *
* *
* $Archive:: /G/wwlib/hashcalc.h $*
* *
* Author:: Greg Hjelstrom *
* *
* $Modtime:: 4/02/99 11:59a $*
* *
* $Revision:: 3 $*
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
#ifndef HASHCALC_H
#define HASHCALC_H
/*
** HashCalculatorClass
** The hash calculator is used to abstract the process of computing a hash
** value for an object. Also, when dealing with floating point values, you
** may need to have a fudge factor and therefore have several valid hash
** values for a particular object (generated by adding and subtracting an
** epsilon to the number(s)). This class lets you define any number
** of hash values. This class is used by the UniqueArrayClass and the HashTableClass
** templates. Basically, you give one of these to the UniqueArrayClass at
** construction time. It will call the Num_Hash_Bits function in order to
** properly allocate its hash table. Then, for each object you pass into the
** Add function, it will call Compute_Hash, then it will loop through
** Num_Hash_Values, calling Get_Hash_Value for each index and see if the object
** is found in the indicated slot. Also, when it is checking to see if it has
** the object you "Added", the Items_Match function is called. This again
** allows you to do epsilon tests. Make sense?
*/
template <class T> class HashCalculatorClass
{
public:
virtual bool Items_Match(const T & a, const T & b) = 0;
virtual void Compute_Hash(const T & item) = 0;
virtual int Num_Hash_Bits(void) = 0;
virtual int Num_Hash_Values(void) = 0;
virtual int Get_Hash_Value(int index = 0) = 0;
};
#endif