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// -*- C++ -*-
///////////////////////////////////////////////////////////////////////////////
// File: reference.h //
// Description: header file for checkxor management (Creference class) //
// This file is part of the SISCone project. //
// For more details, see http://projects.hepforge.org/siscone //
// //
// Copyright (c) 2006 Gavin Salam and Gregory Soyez //
// //
// 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 2 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, write to the Free Software //
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA //
// //
// $Revision:: 123 $//
// $Date:: 2007-03-01 02:52:16 +0100 (Thu, 01 Mar 2007) $//
///////////////////////////////////////////////////////////////////////////////
#ifndef __REFERENCE_H__
#define __REFERENCE_H__
namespace siscone{
/**
* \class Creference
* \brief references used for checksums.
*
* This class implements some reference variable
* that can be used for checksums. Those checksums
* are useful to disentengle between contents of two
* cones without looking into their explicit particle
* contents.
*/
class Creference{
public:
/// default constructor
Creference();
/// create a random reference
void randomize();
/// test emptyness
bool is_empty();
/// test non-emptyness
bool not_empty();
/// assignment of reference
Creference& operator = (const Creference &r);
/// addition of reference
Creference operator + (const Creference &r);
/// incrementation of reference
Creference& operator += (const Creference &r);
/// decrementation of reference
Creference& operator -= (const Creference &r);
/// accessing the reference
inline unsigned int operator[] (int i) {return ref[i];}
unsigned int ref[3]; ///< actual data for the reference
};
/// addition of two references
Creference operator + (Creference &r1, Creference &r2);
/// equality test of two references
bool operator == (const Creference &r1, const Creference &r2);
/// difference test of two references
bool operator != (const Creference &r1, const Creference &r2);
/// ordering of two references
bool operator < (const Creference &r1, const Creference &r2);
//=============== inline material ================
// equality test for two references
//----------------------------------
inline bool operator == (const Creference &r1, const Creference &r2){
return (r1.ref[0]==r2.ref[0]) && (r1.ref[1]==r2.ref[1]) && (r1.ref[2]==r2.ref[2]);
}
// difference test for two references
//----------------------------------
inline bool operator != (const Creference &r1, const Creference &r2){
return (r1.ref[0]!=r2.ref[0]) || (r1.ref[1]!=r2.ref[1]) || (r1.ref[2]!=r2.ref[2]);
}
// difference test for two references
//----------------------------------
inline bool operator < (const Creference &r1, const Creference &r2){
return (r1.ref[0]<r2.ref[0]) || ((r1.ref[0]==r2.ref[0]) &&
((r1.ref[1]<r2.ref[1]) || ((r1.ref[1]==r2.ref[1]) && (r1.ref[2]<r2.ref[2]))
));
}
}
#endif

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