Detailed Description

Parser for HepMC2 I/O files.

Examples: HepMC2_reader_example.cc, and convert_example.cc.

Definition at line 30 of file ReaderAsciiHepMC2.h.

#include <ReaderAsciiHepMC2.h>

Inheritance diagram for ReaderAsciiHepMC2:

Collaboration diagram for ReaderAsciiHepMC2:

Public Member Functions
	ReaderAsciiHepMC2 (const std::string &filename)
	Default constructor.
	ReaderAsciiHepMC2 (std::istream &)
	The ctor to read from stdin.
	~ReaderAsciiHepMC2 ()
	Destructor.
bool	read_event (GenEvent &evt)
	Implementation of Reader::read_event.
bool	failed ()
	Return status of the stream.
void	close ()
	Close file stream.
shared_ptr< GenRunInfo >	run_info () const
	Get the global GenRunInfo object.

Protected Member Functions
void	set_run_info (shared_ptr< GenRunInfo > run)
	Set the global GenRunInfo object.

Private Member Functions
int	parse_event_information (GenEvent &evt, const char *buf)
	Parse event.
bool	parse_units (GenEvent &evt, const char *buf)
	Parse units.
int	parse_vertex_information (const char *buf)
	Parse vertex.
int	parse_particle_information (const char *buf)
	Parse particle.
bool	parse_weight_names (const char *buf)
	Parse weight names.
bool	parse_heavy_ion (GenEvent &evt, const char *buf)
	Parse heavy ion information.
bool	parse_pdf_info (GenEvent &evt, const char *buf)
	Parse pdf information.
bool	parse_xs_info (GenEvent &evt, const char *buf)
	Parse pdf information.

Private Attributes
std::ifstream	m_file
	Input file.
std::istream *	m_stream
	For ctor when reading from stdin.
bool	m_isstream
	toggles usage of m_file or m_stream
vector< GenVertexPtr >	m_vertex_cache
	Vertex cache.
vector< int >	m_vertex_barcodes
	Old vertex barcodes.
vector< GenParticlePtr >	m_particle_cache
	Particle cache.
vector< int >	m_end_vertex_barcodes
	Old end vertex barcodes.
GenEvent *	m_event_ghost
	To save particle and verstex attributes.
vector< GenParticlePtr >	m_particle_cache_ghost
	Particle cache for attributes.
vector< GenVertexPtr >	m_vertex_cache_ghost
	Vertex cache for attributes.
shared_ptr< GenRunInfo >	m_run_info
	The global GenRunInfo object.

Constructor & Destructor Documentation

◆ ReaderAsciiHepMC2() [1/2]

ReaderAsciiHepMC2 ( const std::string & filename )

Default constructor.

Definition at line 25 of file ReaderAsciiHepMC2.cc.

References m_event_ghost, m_file, m_isstream, m_stream, and Reader::set_run_info().

◆ ReaderAsciiHepMC2() [2/2]

ReaderAsciiHepMC2 ( std::istream & stream )

The ctor to read from stdin.

Definition at line 34 of file ReaderAsciiHepMC2.cc.

References m_event_ghost, m_isstream, m_stream, and Reader::set_run_info().

◆ ~ReaderAsciiHepMC2()

~ReaderAsciiHepMC2 ( )

Destructor.

Definition at line 44 of file ReaderAsciiHepMC2.cc.

References close(), m_event_ghost, and m_isstream.

Member Function Documentation

◆ close()

void close ( )

virtual

Close file stream.

Implements Reader.

Examples: HepMC2_reader_example.cc.

Definition at line 649 of file ReaderAsciiHepMC2.cc.

References m_event_ghost, and m_file.

◆ failed()

bool failed ( )

virtual

Return status of the stream.

Implements Reader.

Examples: HepMC2_reader_example.cc.

Definition at line 647 of file ReaderAsciiHepMC2.cc.

References m_file, m_isstream, and m_stream.

◆ parse_event_information()

int parse_event_information	(	GenEvent &	evt,
		const char *	buf )

private

Parse event.

Helper routine for parsing event information

Parameters

[out]	evt	Event that will be filled with new data
[in]	buf	Line of text that needs to be parsed

Definition at line 250 of file ReaderAsciiHepMC2.cc.

References GenEvent::add_attribute(), DEBUG, GenEvent::set_event_number(), and GenEvent::weights().

◆ parse_heavy_ion()

bool parse_heavy_ion	(	GenEvent &	evt,
		const char *	buf )

private

Parse heavy ion information.

Helper routine for parsing heavy ion information

Parameters

[out]	evt	Event that will be filled with new data
[in]	buf	Line of text that needs to be parsed

Definition at line 557 of file ReaderAsciiHepMC2.cc.

References GenEvent::add_attribute().

◆ parse_particle_information()

int parse_particle_information ( const char * buf )

private

Parse particle.

Helper routine for parsing single particle information

Parameters

[in] buf Line of text that needs to be parsed

Note: barcode is ignored

Definition at line 422 of file ReaderAsciiHepMC2.cc.

References DEBUG, m_end_vertex_barcodes, m_event_ghost, m_particle_cache, m_particle_cache_ghost, m_vertex_barcodes, m_vertex_cache, FourVector::setE(), FourVector::setPx(), FourVector::setPy(), and FourVector::setPz().

◆ parse_pdf_info()

bool parse_pdf_info	(	GenEvent &	evt,
		const char *	buf )

private

Parse pdf information.

Helper routine for parsing pdf information

Parameters

[out]	evt	Event that will be filled with new data
[in]	buf	Line of text that needs to be parsed

Definition at line 608 of file ReaderAsciiHepMC2.cc.

References GenEvent::add_attribute().

◆ parse_units()

bool parse_units	(	GenEvent &	evt,
		const char *	buf )

private

Parse units.

Helper routine for parsing unit information

Parameters

[out]	evt	Event that will be filled with unit information
[in]	buf	Line of text that needs to be parsed

Definition at line 334 of file ReaderAsciiHepMC2.cc.

References DEBUG, GenEvent::length_unit(), Units::length_unit(), GenEvent::momentum_unit(), Units::momentum_unit(), Units::name(), and GenEvent::set_units().

◆ parse_vertex_information()

int parse_vertex_information ( const char * buf )

private

Parse vertex.

Helper routine for parsing single event information

Parameters

[in] buf Line of text that needs to be parsed

Definition at line 354 of file ReaderAsciiHepMC2.cc.

References DEBUG, m_event_ghost, m_vertex_barcodes, m_vertex_cache, m_vertex_cache_ghost, FourVector::setT(), FourVector::setX(), FourVector::setY(), and FourVector::setZ().

◆ parse_weight_names()

bool parse_weight_names ( const char * buf )

private

Parse weight names.

Helper routine for parsing weight names

Parameters

[in] buf Line of text that needs to be parsed

Definition at line 523 of file ReaderAsciiHepMC2.cc.

References Reader::run_info().

◆ parse_xs_info()

bool parse_xs_info	(	GenEvent &	evt,
		const char *	buf )

private

Parse pdf information.

Helper routine for parsing cross-section information

Parameters

[out]	evt	Event that will be filled with new data
[in]	buf	Line of text that needs to be parsed

Definition at line 507 of file ReaderAsciiHepMC2.cc.

References GenEvent::add_attribute().

◆ read_event()

bool read_event ( GenEvent & evt )

virtual

Implementation of Reader::read_event.

Bug: HepMC2 files produced with Pythia8 are known to have wrong information about number of particles in vertex. Hence '<' sign

Bug: HepMC2 files produced with Pythia8 are known to have wrong information about number of particles in vertex. Hence '<' sign

Implements Reader.

Examples: HepMC2_reader_example.cc.

Definition at line 47 of file ReaderAsciiHepMC2.cc.

References GenEvent::add_tree(), GenEvent::clear(), DEBUG, ERROR, failed(), m_end_vertex_barcodes, m_event_ghost, m_file, m_isstream, m_particle_cache, m_particle_cache_ghost, m_stream, m_vertex_barcodes, m_vertex_cache, m_vertex_cache_ghost, parse_event_information(), parse_heavy_ion(), parse_particle_information(), parse_pdf_info(), parse_units(), parse_vertex_information(), parse_weight_names(), parse_xs_info(), GenEvent::reserve(), Reader::run_info(), GenEvent::set_run_info(), and WARNING.

◆ run_info()

shared_ptr< GenRunInfo > run_info ( ) const

inlineinherited

Get the global GenRunInfo object.

Examples: LHEF_example_cat.cc, and convert_example.cc.

Definition at line 39 of file Reader.h.

References m_run_info.

◆ set_run_info()

void set_run_info ( shared_ptr< GenRunInfo > run )

inlineprotectedinherited

Set the global GenRunInfo object.

Definition at line 46 of file Reader.h.

References m_run_info.

Field Documentation

◆ m_end_vertex_barcodes

vector<int> m_end_vertex_barcodes

private

Old end vertex barcodes.

Definition at line 133 of file ReaderAsciiHepMC2.h.

◆ m_event_ghost

GenEvent* m_event_ghost

private

To save particle and verstex attributes.

Definition at line 135 of file ReaderAsciiHepMC2.h.

◆ m_file

std::ifstream m_file

private

Input file.

Definition at line 125 of file ReaderAsciiHepMC2.h.

◆ m_isstream

bool m_isstream

private

toggles usage of m_file or m_stream

Definition at line 127 of file ReaderAsciiHepMC2.h.

◆ m_particle_cache

vector<GenParticlePtr> m_particle_cache

private

Particle cache.

Definition at line 132 of file ReaderAsciiHepMC2.h.

◆ m_particle_cache_ghost

vector<GenParticlePtr> m_particle_cache_ghost

private

Particle cache for attributes.

Definition at line 136 of file ReaderAsciiHepMC2.h.

◆ m_run_info

shared_ptr<GenRunInfo> m_run_info

privateinherited

The global GenRunInfo object.

Definition at line 53 of file Reader.h.

◆ m_stream

std::istream* m_stream

private

For ctor when reading from stdin.

Definition at line 126 of file ReaderAsciiHepMC2.h.

◆ m_vertex_barcodes

vector<int> m_vertex_barcodes

private

Old vertex barcodes.

Definition at line 130 of file ReaderAsciiHepMC2.h.

◆ m_vertex_cache

vector<GenVertexPtr> m_vertex_cache

private

Vertex cache.

Definition at line 129 of file ReaderAsciiHepMC2.h.

◆ m_vertex_cache_ghost

vector<GenVertexPtr> m_vertex_cache_ghost

private

Vertex cache for attributes.

Definition at line 137 of file ReaderAsciiHepMC2.h.

The documentation for this class was generated from the following files:

Detailed Description

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Constructor & Destructor Documentation

◆ ReaderAsciiHepMC2() [1/2]

◆ ReaderAsciiHepMC2() [2/2]

◆ ~ReaderAsciiHepMC2()

Member Function Documentation

◆ close()

◆ failed()

◆ parse_event_information()

◆ parse_heavy_ion()

◆ parse_particle_information()

◆ parse_pdf_info()

◆ parse_units()

◆ parse_vertex_information()

◆ parse_weight_names()

◆ parse_xs_info()

◆ read_event()

◆ run_info()

◆ set_run_info()

Field Documentation

◆ m_end_vertex_barcodes

◆ m_event_ghost

◆ m_file

◆ m_isstream

◆ m_particle_cache

◆ m_particle_cache_ghost

◆ m_run_info

◆ m_stream

◆ m_vertex_barcodes

◆ m_vertex_cache

◆ m_vertex_cache_ghost