HyjPar.h

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
//
// Description:
//      Class definition for HyjPar, which is used
//      to modify HYJPAR common.
 
#ifndef HyjPar_h
#define HyjPar_h
 
#include <cstdint>
 
extern "C" { uintptr_t hyjpar_address_(); }
 
class HyjPar {
public:
    HyjPar();
    ~HyjPar();
    
    double&     ptmin  (void);
    double&     sigin  (void);
    double&     sigjet    (void);
    int&        nhsel  (void);
    int&        ishad  (void);
    int&        njet    (void);
 
    void    init    (void);
 
private: 
 
    struct HYJPAR;
    friend struct HYJPAR;
 
    struct HYJPAR
    {
      double      ptmin;
      double      sigin;
      double      sigjet;
      int         nhsel;
      int         ishad;
      int         njet;
    };
 
    static HYJPAR* s_hyjpar;
};
 
// set pointer to zero at start
HyjPar::HYJPAR* HyjPar::s_hyjpar =0;
 
inline void
HyjPar::init(void)
{ if (!s_hyjpar) s_hyjpar = reinterpret_cast<HYJPAR*>(hyjpar_address_()); }
 
// Constructor
inline
HyjPar::HyjPar()
{}
 
// Destructor
inline
HyjPar::~HyjPar()
{}
 
inline double&
HyjPar::ptmin  (void)
{
    init();
    return s_hyjpar->ptmin;
}
 
inline double&
HyjPar::sigin  (void)
{
    init();
    return s_hyjpar->sigin;
}
 
inline double&
HyjPar::sigjet    (void)
{
    init();
    return s_hyjpar->sigjet;
}
 
inline int&
HyjPar::nhsel  (void)
{
    init();
    return s_hyjpar->nhsel;
}
 
inline int&
HyjPar::ishad  (void)
{
    init();
    return s_hyjpar->ishad;
}
 
inline int&
HyjPar::njet    (void)
{
    init();
    return s_hyjpar->njet;
}
 
#endif