This the header for an evio segment structure (EvioSegment). More...

#include <SegmentHeader.h>

Public Member Functions
	SegmentHeader ()=default

	SegmentHeader (uint16_t tag, DataType const &dataType)
	Constructor. More...

uint32_t	getDataLength () override
	Get the length of the structure's data in 32 bit ints (not counting the header words). More...

uint32_t	getHeaderLength () override
	Get the length of the structure's header in ints. More...

std::string	toString () override
	Obtain a string representation of the segment header. More...

size_t	write (std::shared_ptr< ByteBuffer > &dest) override
	Write myself out a byte buffer. More...

size_t	write (ByteBuffer &dest) override
	Write myself out a byte buffer. More...

size_t	write (uint8_t *dest, ByteOrder const &order) override
	Write myself out as evio format data into the given byte array in the specified byte order. More...

uint8_t	getNumber () const
	Get the number. More...

void	setNumber (uint8_t number)
	Set the number. More...

uint32_t	getDataTypeValue () const
	Get the data type for the structure. More...

void	setDataType (uint32_t type)
	Set the numeric data type for the structure. More...

void	setDataType (DataType const &type)
	Set the numeric data type for the structure. More...

DataType	getDataType () const
	Returns the data type for data stored in this structure as a `DataType` enum. More...

std::string	getDataTypeName () const
	Returns the data type as a string. More...

uint8_t	getPadding () const
	Get the amount of padding bytes when storing short or byte data. More...

uint32_t	getLength () const
	Get the length of the structure in 32 bit ints, not counting the length word. More...

void	setLength (uint32_t len)
	Set the length of the structure in 32 bit ints, not counting the length word. More...

uint16_t	getTag () const
	Get the structure tag. More...

void	setTag (uint16_t tag)
	Set the structure tag. More...

Protected Member Functions
void	setPadding (uint8_t pad)
	Set the amount of padding bytes when storing short or byte data. More...

void	copy (std::shared_ptr< BaseStructureHeader > const &head)
	Method to copy data from the fiven header to this one. More...

Protected Attributes
uint32_t	length = 0
	The length of the structure in 32-bit words. More...

uint32_t	tag = 0
	The structure tag. More...

DataType	dataType {DataType::UNKNOWN32}
	The data type of the structure. More...

uint8_t	padding = 0
	The amount of padding bytes when storing short or byte data. More...

uint8_t	number = 0
	The number represents an unsigned byte. More...

Detailed Description

This the header for an evio segment structure (EvioSegment).

It does not contain the raw data, just the header. Copied from the java class of identical name.

Author: heddle (original Java version); timmer

Date: 4/27/2020

Constructor & Destructor Documentation

evio::SegmentHeader::SegmentHeader ( )

default

evio::SegmentHeader::SegmentHeader	(	uint16_t	tag,
		DataType const &	dataType
	)

Constructor.

Parameters

tag	the tag for the segment header.
dataType	the data type for the content of the segment.

Member Function Documentation

void evio::BaseStructureHeader::copy ( std::shared_ptr< BaseStructureHeader > const & head )

protectedinherited

Method to copy data from the fiven header to this one.

Parameters

head	header to copy data from (source).

References evio::BaseStructureHeader::dataType, evio::BaseStructureHeader::length, evio::BaseStructureHeader::number, evio::BaseStructureHeader::padding, and evio::BaseStructureHeader::tag.

uint32_t evio::SegmentHeader::getDataLength ( )

overridevirtual

Get the length of the structure's data in 32 bit ints (not counting the header words).

Returns: Get the length of the structure's data in 32 bit ints (not counting the header words).

Reimplemented from evio::BaseStructureHeader.

References evio::BaseStructureHeader::length.

DataType evio::BaseStructureHeader::getDataType ( ) const

inherited

Returns the data type for data stored in this structure as a DataType enum.

Returns: the data type for data stored in this structure as a DataType enum.

See Also: DataType

References evio::BaseStructureHeader::dataType.

std::string evio::BaseStructureHeader::getDataTypeName ( ) const

inherited

Returns the data type as a string.

Returns: the data type as a string.

References evio::BaseStructureHeader::dataType, and evio::DataType::getName().

Referenced by toString(), evio::TagSegmentHeader::toString(), and evio::BankHeader::toString().

uint32_t evio::BaseStructureHeader::getDataTypeValue ( ) const

inherited

Get the data type for the structure.

Returns: the data type for the structure.

References evio::BaseStructureHeader::dataType, and evio::DataType::getValue().

uint32_t evio::SegmentHeader::getHeaderLength ( )

overridevirtual

Get the length of the structure's header in ints.

This includes the first header word itself (which contains the length) and in the case of banks, it also includes the second header word.

Returns: Get the length of the structure's header in ints.

Reimplemented from evio::BaseStructureHeader.

uint32_t evio::BaseStructureHeader::getLength ( ) const

inherited

Get the length of the structure in 32 bit ints, not counting the length word.

Returns: Get the length of the structure in 32 bit ints (not counting the length word).

References evio::BaseStructureHeader::length.

uint8_t evio::BaseStructureHeader::getNumber ( ) const

inherited

Get the number.

Only Banks have a number field in their header, so this is only relevant for Banks.

Returns: the number.

References evio::BaseStructureHeader::number.

uint8_t evio::BaseStructureHeader::getPadding ( ) const

inherited

Get the amount of padding bytes when storing short or byte data.

Value is 0, 1, 2, or 3 for bytes and 0 or 2 for shorts.

Returns: number of padding bytes

References evio::BaseStructureHeader::padding.

uint16_t evio::BaseStructureHeader::getTag ( ) const

inherited

Get the structure tag.

Returns: the structure tag.

References evio::BaseStructureHeader::tag.

void evio::BaseStructureHeader::setDataType ( uint32_t type )

inherited

Set the numeric data type for the structure.

Parameters

type	the numeric data type for the structure.

References evio::BaseStructureHeader::dataType, and evio::DataType::getDataType().

void evio::BaseStructureHeader::setDataType ( DataType const & type )

inherited

Set the numeric data type for the structure.

Parameters

type	the numeric data type for the structure.

References evio::BaseStructureHeader::dataType.

void evio::BaseStructureHeader::setLength ( uint32_t len )

inherited

Set the length of the structure in 32 bit ints, not counting the length word.

Parameters

len	the length of the structure in 32 bit ints, not counting the length word.

References evio::BaseStructureHeader::length.

void evio::BaseStructureHeader::setNumber ( uint8_t num )

inherited

Set the number.

Only Banks have a number field in their header, so this is only relevant for Banks.

Parameters

num	the number.

References evio::BaseStructureHeader::number.

void evio::BaseStructureHeader::setPadding ( uint8_t pad )

protectedinherited

Set the amount of padding bytes when storing short or byte data.

Allowed value is 0, 1, 2, or 3 for bytes and 0 or 2 for shorts.

Parameters

pad	amount of padding bytes when storing short or byte data (0-3).

References evio::BaseStructureHeader::padding.

void evio::BaseStructureHeader::setTag ( uint16_t t )

inherited

Set the structure tag.

Parameters

t	the structure tag.

References evio::BaseStructureHeader::tag.

std::string evio::SegmentHeader::toString ( )

overridevirtual

Obtain a string representation of the segment header.

Returns: a string representation of the segment header.

Reimplemented from evio::BaseStructureHeader.

References evio::BaseStructureHeader::getDataTypeName(), evio::BaseStructureHeader::length, evio::BaseStructureHeader::padding, and evio::BaseStructureHeader::tag.

size_t evio::SegmentHeader::write ( std::shared_ptr< ByteBuffer > & byteBuffer )

overridevirtual

Write myself out a byte buffer.

This write is relative - i.e., it uses the current position of the buffer.

Parameters

byteBuffer the byteBuffer to write to.

Returns: the number of bytes written, which for a SegmentHeader is 4.

Reimplemented from evio::BaseStructureHeader.

size_t evio::SegmentHeader::write ( ByteBuffer & byteBuffer )

overridevirtual

Write myself out a byte buffer.

This write is relative - i.e., it uses the current position of the buffer.

Parameters

byteBuffer the byteBuffer to write to.

Returns: the number of bytes written, which for a SegmentHeader is 4.

Reimplemented from evio::BaseStructureHeader.

References evio::BaseStructureHeader::dataType, evio::DataType::getValue(), evio::BaseStructureHeader::length, evio::BaseStructureHeader::padding, evio::ByteBuffer::putInt(), and evio::BaseStructureHeader::tag.

size_t evio::SegmentHeader::write	(	uint8_t *	dest,
		ByteOrder const &	order
	)

overridevirtual

Write myself out as evio format data into the given byte array in the specified byte order.

Parameters

dest	array into which evio data is written.
order	byte order in which to write the data.

Returns: the number of bytes written, which for a SegmentHeader is 4.

Exceptions

EvioException if destination array too small to hold data.

Reimplemented from evio::BaseStructureHeader.

References evio::BaseStructureHeader::dataType, evio::DataType::getValue(), evio::BaseStructureHeader::length, evio::BaseStructureHeader::padding, evio::BaseStructureHeader::tag, and evio::Util::toBytes().

Member Data Documentation

DataType evio::BaseStructureHeader::dataType {DataType::UNKNOWN32}

protectedinherited

The data type of the structure.

Referenced by evio::BaseStructureHeader::BaseStructureHeader(), evio::BaseStructureHeader::copy(), evio::BaseStructureHeader::getDataType(), evio::BaseStructureHeader::getDataTypeName(), evio::BaseStructureHeader::getDataTypeValue(), evio::BaseStructureHeader::setDataType(), write(), evio::BankHeader::write(), and evio::TagSegmentHeader::write().

uint32_t evio::BaseStructureHeader::length = 0

protectedinherited

The length of the structure in 32-bit words.

This never includes the first header word itself (which contains the length).

Referenced by evio::BankHeader::BankHeader(), evio::BaseStructureHeader::copy(), getDataLength(), evio::BankHeader::getDataLength(), evio::TagSegmentHeader::getDataLength(), evio::BaseStructureHeader::getLength(), evio::BaseStructureHeader::setLength(), evio::TagSegmentHeader::TagSegmentHeader(), toString(), evio::TagSegmentHeader::toString(), evio::BankHeader::toString(), write(), evio::BankHeader::write(), and evio::TagSegmentHeader::write().

uint8_t evio::BaseStructureHeader::number = 0

protectedinherited

The number represents an unsigned byte.

Only Banks have a number field in their header, so this is only relevant for Banks.

Referenced by evio::BaseStructureHeader::BaseStructureHeader(), evio::BaseStructureHeader::copy(), evio::BaseStructureHeader::getNumber(), evio::BaseStructureHeader::setNumber(), evio::BankHeader::toString(), and evio::BankHeader::write().

uint8_t evio::BaseStructureHeader::padding = 0

protectedinherited

The amount of padding bytes when storing short or byte data.

Allowed value is 0, 1, 2, or 3 (0,2 for shorts and 0-3 for bytes) and is stored in the upper 2 bits of the dataType when written out.

Referenced by evio::BaseStructureHeader::copy(), evio::BaseStructureHeader::getPadding(), evio::BaseStructureHeader::setPadding(), toString(), evio::BankHeader::toString(), write(), and evio::BankHeader::write().

uint32_t evio::BaseStructureHeader::tag = 0

protectedinherited

The structure tag.

Referenced by evio::BaseStructureHeader::BaseStructureHeader(), evio::BaseStructureHeader::copy(), evio::BaseStructureHeader::getTag(), evio::BaseStructureHeader::setTag(), toString(), evio::TagSegmentHeader::toString(), evio::BankHeader::toString(), write(), evio::BankHeader::write(), and evio::TagSegmentHeader::write().

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

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation