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

template<typename CppT>
class ROOT::Experimental::Internal::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 318 of file RColumnElement.hxx.

Public Member Functions
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::Internal::RColumnElementBase
	RColumnElementBase (const RColumnElementBase &other)=default
	RColumnElementBase (RColumnElementBase &&other)=default
virtual	~RColumnElementBase ()=default
std::size_t	GetBitsOnStorage () const
std::size_t	GetPackedSize (std::size_t nElements=1U) 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

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

Protected Member Functions
	RColumnElementLE (std::size_t size, std::size_t bitsOnStorage)
Protected Member Functions inherited from ROOT::Experimental::Internal::RColumnElementBase
	RColumnElementBase (std::size_t size, std::size_t bitsOnStorage=0)

Additional Inherited Members
Static Public Member Functions inherited from ROOT::Experimental::Internal::RColumnElementBase
template<typename CppT = void>
static std::unique_ptr< RColumnElementBase >	Generate (EColumnType type)
	If CppT == void, use the default C++ type for the given column type.
template<>
std::unique_ptr< RColumnElementBase >	Generate (EColumnType type)
template<>
std::unique_ptr< ROOT::Experimental::Internal::RColumnElementBase >	Generate (EColumnType type)
static std::size_t	GetBitsOnStorage (EColumnType type)
static std::string	GetTypeName (EColumnType type)
Protected Attributes inherited from ROOT::Experimental::Internal::RColumnElementBase
std::size_t	fBitsOnStorage
std::size_t	fSize
	Size of the C++ value that corresponds to the on-disk element.

#include <ROOT/RColumnElement.hxx>

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

Constructor & Destructor Documentation

RColumnElementLE()

template<typename CppT >

ROOT::Experimental::Internal::RColumnElementLE< CppT >::RColumnElementLE ( std::size_t  size, std::size_t  bitsOnStorage  )

inlineexplicitprotected

Definition at line 320 of file RColumnElement.hxx.

Member Function Documentation

Pack()

template<typename CppT >

void ROOT::Experimental::Internal::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::Internal::RColumnElementBase.

Definition at line 325 of file RColumnElement.hxx.

Unpack()

template<typename CppT >

void ROOT::Experimental::Internal::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::Internal::RColumnElementBase.

Definition at line 333 of file RColumnElement.hxx.

Member Data Documentation

kIsMappable

template<typename CppT >

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

staticconstexpr

Definition at line 323 of file RColumnElement.hxx.