ReaderAscii.h

// -*- C++ -*-
//
// This file is part of HepMC
// Copyright (C) 2014-2023 The HepMC collaboration (see AUTHORS for details)
//
#ifndef HEPMC3_READERASCII_H
#define HEPMC3_READERASCII_H
#include <set>
#include <string>
#include <fstream>
#include <istream>
#include <iterator>
#include <unordered_map>
#include "HepMC3/Reader.h"
#include "HepMC3/GenEvent.h"
#include "HepMC3/Data/GenEventData.h"
 
 
namespace HepMC3 {
 
 
class ReaderAscii : public Reader {
public:

    ReaderAscii(const std::string& filename);
    ReaderAscii(std::istream &);
    ReaderAscii(std::shared_ptr<std::istream> s_stream);
    ~ReaderAscii();

    bool skip(const int)  override;

    bool read_event(GenEvent& evt)  override;

    bool failed()  override;

    void close()  override;
 
private:

    static std::string unescape(const std::string& s);


    std::pair<int,int> parse_event_information(const char *buf);

    bool parse_weight_values(const char *buf);

    bool parse_units(const char *buf);

    bool parse_pdf_info(const char *buf);

    bool parse_heavy_ion(const char *buf);

    bool parse_cross_section( const char *buf);

    bool parse_vertex_information(const char *buf);

    bool parse_particle_information(const char *buf);

    bool parse_attribute( const char *buf);

    bool parse_run_attribute(const char *buf);

    bool parse_weight_names(const char *buf);

    bool parse_tool(const char *buf);
 
 
private:
 
    std::ifstream m_file; 
    std::shared_ptr<std::istream> m_shared_stream = nullptr;
    std::istream* m_stream = nullptr; 
    bool m_isstream; 

    std::map<int, std::pair< std::set<int>, std::set<int> > >  m_io_explicit;
    std::unordered_map<int, std::pair< std::set<int>, std::set<int> > >  m_io_implicit;
    std::vector<int> m_io_implicit_ids;
    std::set<int> m_io_explicit_ids;
 
    GenEventData m_data; 
};
 
 
} // namespace HepMC3
 
#endif