Pythia6Interface.h

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2013-2025  Laurent Forthomme
 *
 *  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
 *  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/>.
 */
 
#ifndef CepGenPythia6_Pythia6Interface_h
#define CepGenPythia6_Pythia6Interface_h
 
#include <array>
#include <string>
#include <vector>
 
extern "C" {
extern struct {
  int n;  
  int npad;
  int k[5][4000];     
  double p[5][4000];  
  double v[5][4000];  
} pyjets_;
extern struct {
  std::array<int, 200> mstu;
  std::array<double, 200> paru;
  std::array<int, 200> mstj;
  std::array<double, 200> parj;
} pydat1_;
}
 
namespace cepgen::pythia6 {
  int pythia6Status(int);
  int cepgenStatus(int);
  void checkPDGid(int);
 
  double pyalem(double);
  double pyalps(double);
  void pyckbd();
  void pyexec();
  void pygive(const std::string&);
  void pyjoin(std::vector<int> join);
  int pyk(int id, int qty);
  void pylist(int mlist);
  double pymass(int pdgid_);
  std::string pyname(int pdgid);
  double pyp(int id, int qty);
  inline static int& mstu(size_t i) { return pydat1_.mstu.at(i - 1); }
  inline static double& paru(size_t i) { return pydat1_.paru.at(i - 1); }
}  // namespace cepgen::pythia6
 
#endif