RColumnElement.hxx File Reference

#include <ROOT/RColumnElementBase.hxx>
#include <ROOT/RNTupleUtil.hxx>
#include <ROOT/RConfig.hxx>
#include <ROOT/RError.hxx>
#include <Byteswap.h>
#include <bitset>
#include <cassert>
#include <limits>
#include <type_traits>

Include dependency graph for RColumnElement.hxx:

This graph shows which files directly or indirectly include this file:

Namespaces
namespace	Quantize
namespace	ROOT
	tbb::task_arena is an alias of tbb::interface7::task_arena, which doesn't allow to forward declare tbb::task_arena without forward declaring tbb::interface7
namespace	ROOT::Experimental
namespace	ROOT::Experimental::Internal
namespace	ROOT::Experimental::Internal::BitPacking

Macros
#define	__RCOLUMNELEMENT_SPEC_BODY(CppT, ColumnT, BaseT, BitsOnStorage)
#define	DECLARE_RCOLUMNELEMENT_SPEC(CppT, ColumnT, BitsOnStorage, BaseT, ...)
	These macros are used to declare RColumnElement template specializations below.
#define	DECLARE_RCOLUMNELEMENT_SPEC_SIMPLE(CppT, ColumnT, BitsOnStorage)
#define	R__LITTLE_ENDIAN   0

Typedefs
using	ROOT::Experimental::Internal::BitPacking::Word_t = std::uintmax_t

Functions
constexpr std::size_t	ROOT::Experimental::Internal::BitPacking::MinBufSize (std::size_t count, std::size_t nDstBits)
	Returns the minimum safe size (in bytes) of a buffer that is intended to be used as a destination for PackBits or a source for UnpackBits.
void	ROOT::Experimental::Internal::BitPacking::PackBits (void *dst, const void *src, std::size_t count, std::size_t sizeofSrc, std::size_t nDstBits)
	Tightly packs count items of size sizeofSrc contained in src into dst using nDstBits per item.
void	ROOT::Experimental::Internal::BitPacking::UnpackBits (void *dst, const void *src, std::size_t count, std::size_t sizeofDst, std::size_t nSrcBits)
	Undoes the effect of PackBits.

Variables
constexpr std::size_t	ROOT::Experimental::Internal::BitPacking::kBitsPerWord = sizeof(Word_t) * 8

Macro Definition Documentation

__RCOLUMNELEMENT_SPEC_BODY

#define __RCOLUMNELEMENT_SPEC_BODY	(		CppT,
			ColumnT,
			BaseT,
			BitsOnStorage
	)

Value:

   static constexpr std::size_t kSize = sizeof(CppT);                   \
   static constexpr std::size_t kBitsOnStorage = BitsOnStorage;         \
   RColumnElement() : BaseT(kSize, kBitsOnStorage) {}                   \
   bool IsMappable() const final                                        \
   {                                                                    \
      return kIsMappable;                                               \
   }                                                                    \
   RIdentifier GetIdentifier() const final                              \
   {                                                                    \
      return RIdentifier{typeid(CppT), ColumnT};                        \
   }

Definition at line 1155 of file RColumnElement.hxx.

DECLARE_RCOLUMNELEMENT_SPEC

#define DECLARE_RCOLUMNELEMENT_SPEC	(		CppT,
			ColumnT,
			BitsOnStorage,
			BaseT,
			...
	)

Value:

   template <>                                                                \
   class RColumnElement<CppT, ColumnT> : public BaseT __VA_ARGS__ {           \
   public:                                                                    \
      __RCOLUMNELEMENT_SPEC_BODY(CppT, ColumnT, BaseT, BitsOnStorage)         \
   }

These macros are used to declare RColumnElement template specializations below.

Additional arguments can be used to forward template parameters to the base class, e.g.

DECLARE_RCOLUMNELEMENT_SPEC(std::int64_t, EColumnType::kInt32, 32,
                            RColumnElementCastLE, <std::int64_t, std::int32_t>);

Definition at line 1173 of file RColumnElement.hxx.

DECLARE_RCOLUMNELEMENT_SPEC_SIMPLE

#define DECLARE_RCOLUMNELEMENT_SPEC_SIMPLE	(		CppT,
			ColumnT,
			BitsOnStorage
	)

Value:

   template <>                                                                     \
   class RColumnElement<CppT, ColumnT> : public RColumnElementBase {               \
   public:                                                                         \
      static constexpr bool kIsMappable = true;                                    \
      __RCOLUMNELEMENT_SPEC_BODY(CppT, ColumnT, RColumnElementBase, BitsOnStorage) \
   }

Definition at line 1179 of file RColumnElement.hxx.

R__LITTLE_ENDIAN

#define R__LITTLE_ENDIAN   0

Definition at line 26 of file RColumnElement.hxx.