HepMC3 event record library
WriterRoot.cc
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1// -*- C++ -*-
2//
3// This file is part of HepMC
4// Copyright (C) 2014-2019 The HepMC collaboration (see AUTHORS for details)
5//
6/**
7 * @file WriterRoot.cc
8 * @brief Implementation of \b class WriterRoot
9 *
10 */
11#include <cstdio> // sprintf
12#include "HepMC3/WriterRoot.h"
13#include "HepMC3/Version.h"
14// ROOT header files
15#include "TFile.h"
16#include "TTree.h"
17
18namespace HepMC3 {
19HEPMC3_DECLARE_WRITER_FILE(WriterRoot)
20
21WriterRoot::WriterRoot(const std::string &filename, std::shared_ptr<GenRunInfo> run):
22 m_events_count(0) {
23 set_run_info(run);
24
25 m_file = TFile::Open(filename.c_str(), "RECREATE");
26 if ( !m_file->IsOpen() ) {
27 HEPMC3_ERROR("WriterRoot: problem opening file: " << filename)
28 return;
29 }
30
31 if ( run_info() ) write_run_info();
32}
33
35 if ( !m_file->IsOpen() ) return;
36
37 if ( !run_info() ) {
40 } else {
41 if ( evt.run_info() && run_info() != evt.run_info() )
42 HEPMC3_WARNING("WriterRoot::write_event: GenEvents contain "
43 "different GenRunInfo objects from - only the "
44 "first such object will be serialized.")
45 }
46
47 GenEventData data;
48 evt.write_data(data);
49
50 char buf[16] = "";
51 sprintf(buf, "%15i", ++m_events_count);
52
53 int nbytes = m_file->WriteObject(&data, buf);
54
55 if ( nbytes == 0 ) {
56 HEPMC3_ERROR("WriterRoot: error writing event")
57 m_file->Close();
58 }
59}
60
62 if ( !m_file->IsOpen() || !run_info() ) return;
63
64 GenRunInfoData data;
65 run_info()->write_data(data);
66
67 int nbytes = m_file->WriteObject(&data, "GenRunInfoData");
68
69 if ( nbytes == 0 ) {
70 HEPMC3_ERROR("WriterRoot: error writing GenRunInfo")
71 m_file->Close();
72 }
73}
74
76 m_file->Close();
77}
78
80 if ( !m_file->IsOpen() ) return true;
81
82 return false;
83}
84
85} // namespace HepMC3
#define HEPMC3_WARNING(MESSAGE)
Macro for printing HEPMC3_HEPMC3_WARNING messages.
Definition: Errors.h:27
#define HEPMC3_ERROR(MESSAGE)
Macro for printing error messages.
Definition: Errors.h:24
Definition of class WriterRoot.
Stores event-related information.
Definition: GenEvent.h:41
void write_data(GenEventData &data) const
Fill GenEventData object.
Definition: GenEvent.cc:633
std::shared_ptr< GenRunInfo > run_info() const
Get a pointer to the the GenRunInfo object.
Definition: GenEvent.h:137
Stores run-related information.
Definition: GenRunInfo.h:33
GenEvent I/O serialization for root files.
Definition: WriterRoot.h:37
bool failed() override
Get stream error state flag.
Definition: WriterRoot.cc:79
int m_events_count
Events count. Needed to generate unique object name.
Definition: WriterRoot.h:71
void close() override
Close file stream.
Definition: WriterRoot.cc:75
TFile * m_file
File handler.
Definition: WriterRoot.h:70
void write_event(const GenEvent &evt) override
Write event to file.
Definition: WriterRoot.cc:34
void write_run_info()
Write the GenRunInfo object to file.
Definition: WriterRoot.cc:61
std::shared_ptr< GenRunInfo > run_info() const
Get the global GenRunInfo object.
Definition: Writer.h:47
void set_run_info(std::shared_ptr< GenRunInfo > run)
Set the global GenRunInfo object.
Definition: Writer.h:42
HepMC3 main namespace.
Stores serializable event information.
Definition: GenEventData.h:26
Stores serializable run information.