HyfPar.h

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
//
// Description:
//      Class definition for HyfPar, which is used
//      to modify HYFPAR common.
 
#ifndef HyfPar_h
#define HyfPar_h
 
#include <cstdint>
 
extern "C" { uintptr_t hyfpar_address_(); }
 
class HyfPar {
public:
    HyfPar();
    ~HyfPar();
    
    double&     bgen    (void);
    double&     nbcol  (void);
    double&     npart  (void);
    int&        npyt    (void);
    int&        nhyd    (void);
 
    void    init    (void);
 
private: 
 
    struct HYFPAR;
    friend struct HYFPAR;
 
    struct HYFPAR
    {
      double    bgen;
      double    nbcol;
      double    npart;
      int       npyt;
      int       nhyd;
    };
 
    static HYFPAR* s_hyfpar;
};
 
// set pointer to zero at start
HyfPar::HYFPAR* HyfPar::s_hyfpar =0;
 
inline void
HyfPar::init(void)
{ if (!s_hyfpar) s_hyfpar = reinterpret_cast<HYFPAR*>(hyfpar_address_()); }
 
// Constructor
inline
HyfPar::HyfPar()
{}
 
// Destructor
inline
HyfPar::~HyfPar()
{}
 
inline  double&
HyfPar::bgen    (void)
{
    init();
    return s_hyfpar->bgen;
}
 
inline double&
HyfPar::nbcol  (void)
{
    init();
    return s_hyfpar->nbcol;
}
 
inline double&
HyfPar::npart  (void)
{
    init();
    return s_hyfpar->npart;
}
 
inline int&
HyfPar::npyt    (void)
{
    init();
    return s_hyfpar->npyt;
}
 
inline int&
HyfPar::nhyd    (void)
{
    init();
    return s_hyfpar->nhyd;
}
 
#endif