Basic example of use of root I/O: writing events to file.
#include "TFile.h"
#include <iostream>
#include <sstream>
#include "MyClass.h"
#include "MyRunClass.h"
int main(int argc, char **argv) {
if( argc<3 ) {
std::cout << "Usage: " << argv[0] << " <input_hepmc3_file> <output_root_file>" <<std:: endl;
exit(-1);
}
TFile* fFile = new TFile(argv[2],"RECREATE");
int events_parsed = 0;
bool is_gen_run_info_written = false;
while( !text_input.
failed() ) {
if( text_input.
failed() )
break;
if( events_parsed == 0 ) {
std::cout << "First event: " << std::endl;
Print::listing(evt);
}
if(!is_gen_run_info_written) {
fFile->WriteObject(my_run,"MyRunClass");
is_gen_run_info_written = true;
}
}
std::ostringstream os;
os << events_parsed;
std::string stevt = "Event_" + os.str();
const char* chevt = stevt.c_str();
std::cout << "writing " << stevt << std::endl;
fFile->WriteObject(myclass, chevt);
++events_parsed;
if( events_parsed%100 == 0 ) {
std::cout << "Event: " << events_parsed << std::endl;
}
}
fFile->Close();
std::cout << "Events parsed and written: " << events_parsed << std::endl;
return 0;
}
Definition of class GenEvent.
Definition of class GenRunInfo.
Definition of static class Print.
Definition of class ReaderAscii.
Stores event-related information.
std::shared_ptr< GenRunInfo > run_info() const
Get a pointer to the the GenRunInfo object.
Stores run-related information.
GenEvent I/O parsing for structured text files.
bool read_event(GenEvent &evt) override
Load event from file.
bool failed() override
Return status of the stream.
void close() override
Close file stream.
Sample class for root I/O test.
void SetEvent(GenEvent *)
Set HepMC event.
Sample class for root I/O test.
void SetRunInfo(GenRunInfo *)
Set HepMC event.