PyPars.h

Go to the documentation of this file.

/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
//
// Description:
//      Class definition for PyPars which is used
//      to modify PYPARS common.
 
#ifndef PyPars_h
#define PyPars_h
 
#include <cstdint>
 
extern "C" { uintptr_t pypars_address_(); }
 
class PyPars {
public:
    PyPars();
    ~PyPars();
    
    int&    mstp    (int n);
    double&     parp    (int n);
    int&    msti    (int n);
    double&     pari    (int n);
    
    void    init    (void);
 
    // return common array lengths
    inline int lenMstp() const {return s_lenMstp;}
    inline int lenParp() const {return s_lenParp;}
    inline int lenMsti() const {return s_lenMsti;}
    inline int lenPari() const {return s_lenPari;}
 
private: 
 
    // Lengths of the COMMONS
    static const int s_lenMstp = 200;
    static const int s_lenParp = 200;
    static const int s_lenMsti = 200;
    static const int s_lenPari = 200;
 
    struct PYPARS;
    friend struct PYPARS;
 
    struct PYPARS
    {
    int     mstp[s_lenMstp];
    double  parp[s_lenParp];
    int     msti[s_lenMsti];
    double  pari[s_lenPari];
    };
 
    int m_dummy;
    double m_realdummy;
    static PYPARS* s_pypars;
};
 
// set pointer to zero at start
PyPars::PYPARS* PyPars::s_pypars =0;
 
inline void
PyPars::init(void)
{ if (!s_pypars) s_pypars = reinterpret_cast<PYPARS*>(pypars_address_()); }
 
inline 
PyPars::PyPars() 
    : m_dummy       (-999),
      m_realdummy   (-999.)
{}
 
inline 
PyPars::~PyPars() 
{}
 
inline int&
PyPars::mstp    (int n)
{
    init(); // check COMMON is initialized
    if(n < 1 || n > lenMstp()) return m_dummy;
    return s_pypars->mstp[n-1];
}
 
inline double&
PyPars::parp    (int n)
{
    init(); // check COMMON is initialized
    if(n < 1 || n > lenParp()) return m_realdummy;
    return s_pypars->parp[n-1];
}
 
inline int&
PyPars::msti    (int n)
{
    init(); // check COMMON is initialized
    if(n < 1 || n > lenMsti()) return m_dummy;
    return s_pypars->msti[n-1];
}
 
inline double&
PyPars::pari    (int n)
{
    init(); // check COMMON is initialized
    if(n < 1 || n > lenPari()) return m_realdummy;
    return s_pypars->pari[n-1];
}
 
#endif