ROOT::Experimental::Detail::RColumnElementLE< CppT > Class Template Reference

template<typename CppT>
class ROOT::Experimental::Detail::RColumnElementLE< CppT >

Base class for columns whose on-storage representation is little-endian.

The implementation of Pack and Unpack takes care of byteswap if the memory page is big-endian.

Definition at line 140 of file RColumnElement.hxx.

Public Member Functions
	RColumnElementLE (void *rawContent, std::size_t size)
void	Pack (void *dst, void *src, std::size_t count) const final
	If the on-storage layout and the in-memory layout differ, packing creates an on-disk page from an in-memory page.
void	Unpack (void *dst, void *src, std::size_t count) const final
	If the on-storage layout and the in-memory layout differ, unpacking creates a memory page from an on-storage page.
Public Member Functions inherited from ROOT::Experimental::Detail::RColumnElementBase
	RColumnElementBase ()
	RColumnElementBase (const RColumnElementBase &elemArray, std::size_t at)
	RColumnElementBase (const RColumnElementBase &other)=default
	RColumnElementBase (RColumnElementBase &&other)=default
	RColumnElementBase (void *rawContent, std::size_t size)
virtual	~RColumnElementBase ()=default
virtual std::size_t	GetBitsOnStorage () const
std::size_t	GetPackedSize (std::size_t nElements) const
void *	GetRawContent () const
std::size_t	GetSize () const
virtual bool	IsMappable () const
	Derived, typed classes tell whether the on-storage layout is bitwise identical to the memory layout.
RColumnElementBase &	operator= (const RColumnElementBase &other)=delete
RColumnElementBase &	operator= (RColumnElementBase &&other)=default
void	ReadFrom (void *source, std::size_t count)
	Set the column element or an array of elements from the memory location source.
void	WriteTo (void *destination, std::size_t count) const
	Write one or multiple column elements into destination.

Static Public Attributes
static constexpr bool	kIsMappable = ( 0 == 1)

Additional Inherited Members
Static Public Member Functions inherited from ROOT::Experimental::Detail::RColumnElementBase
static std::unique_ptr< RColumnElementBase >	Generate (EColumnType type)
static std::size_t	GetBitsOnStorage (EColumnType type)
static std::string	GetTypeName (EColumnType type)
Protected Attributes inherited from ROOT::Experimental::Detail::RColumnElementBase
void *	fRawContent
	Points to valid C++ data, either a single value or an array of values.
std::size_t	fSize
	Size of the C++ value pointed to by fRawContent (not necessarily equal to the on-disk element size)

#include <ROOT/RColumnElement.hxx>

Inheritance diagram for ROOT::Experimental::Detail::RColumnElementLE< CppT >:

Constructor & Destructor Documentation

RColumnElementLE()

template<typename CppT >

ROOT::Experimental::Detail::RColumnElementLE< CppT >::RColumnElementLE ( void *  rawContent, std::size_t  size  )

inline

Definition at line 143 of file RColumnElement.hxx.

Member Function Documentation

Pack()

template<typename CppT >

void ROOT::Experimental::Detail::RColumnElementLE< CppT >::Pack ( void *  destination, void *  source, std::size_t  count  ) const

inlinefinalvirtual

If the on-storage layout and the in-memory layout differ, packing creates an on-disk page from an in-memory page.

Reimplemented from ROOT::Experimental::Detail::RColumnElementBase.

Definition at line 145 of file RColumnElement.hxx.

Unpack()

template<typename CppT >

void ROOT::Experimental::Detail::RColumnElementLE< CppT >::Unpack ( void *  destination, void *  source, std::size_t  count  ) const

inlinefinalvirtual

If the on-storage layout and the in-memory layout differ, unpacking creates a memory page from an on-storage page.

Reimplemented from ROOT::Experimental::Detail::RColumnElementBase.

Definition at line 153 of file RColumnElement.hxx.

Member Data Documentation

kIsMappable

template<typename CppT >

constexpr bool ROOT::Experimental::Detail::RColumnElementLE< CppT >::kIsMappable = ( 0 == 1)

staticconstexpr

Definition at line 142 of file RColumnElement.hxx.