Used by TEntryList to store the entry numbers.

There are 2 ways to represent entry numbers in a TEntryListBlock:

as bits, where passing entry numbers are assigned 1, not passing - 0
as a simple array of entry numbers
- storing the numbers of entries that pass
- storing the numbers of entries that don't pass

In both cases, a UShort_t* is used. The second option is better in case less than 1/16 or more than 15/16 of entries pass the selection, and the representation can be changed by calling OptimizeStorage() function. When the block is being filled, it's always stored as bits, and the OptimizeStorage() function is called by TEntryList when it starts filling the next block. If Enter() or Remove() is called after OptimizeStorage(), representation is again changed to 1).

Operations on blocks (see also function comments)

Merge() - adds all entries from one block to the other. If the first block uses array representation, it's changed to bits representation only if the total number of passing entries is still less than kBlockSize
GetEntry(n) - returns n-th non-zero entry.
Next() - return next non-zero entry. In case of representation 1), Next() is faster than GetEntry()

Definition at line 43 of file TEntryListBlock.h.

Public Types
enum	{ kBlockSize = 4000 }

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }

enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

enum	EStatusBits { kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) , kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13) }

Public Member Functions
	TEntryListBlock ()
	Default c-tor.

	TEntryListBlock (const TEntryListBlock &eblock)
	Copy c-tor.

	~TEntryListBlock ()
	Destructor.

Int_t	Contains (Int_t entry)
	True if the block contains entry #entry.

Bool_t	Enter (Int_t entry)
	If the block has already been optimized and the entries are stored as a list and not as bits, trying to enter a new entry will make the block switch to bits representation.

Int_t	GetEntry (Int_t entry)
	Return entry #entry.

Int_t	GetNPassed ()
	Returns the number of entries, passing the selection.

Int_t	GetType ()

Int_t	Merge (TEntryListBlock *block)
	Merge with the other block Returns the resulting number of entries in the block.

Int_t	Next ()
	Return the next non-zero entry Faster than GetEntry() function.

TEntryListBlock &	operator= (const TEntryListBlock &rhs)

void	OptimizeStorage ()
	If there are < kBlockSize or >kBlockSize*15 entries, change to an array representation.

virtual void	Print (const Option_t *option="") const
	Print the entries in this block.

void	PrintWithShift (Int_t shift) const
	Print the indices of this block + shift (used from TEntryList::Print()) to print the current values.

Bool_t	Remove (Int_t entry)
	Remove entry #entry If the block has already been optimized and the entries are stored as a list and not as bits, trying to remove a new entry will make the block switch to bits representation.

void	ResetIndices ()

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action.

ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

virtual const char *	ClassName () const
	Returns name of class to which the object belongs.

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility.

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method.

virtual void	Copy (TObject &object) const
	Copy this to obj.

virtual void	Delete (Option_t *option="")
	Delete this object.

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object.

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects.

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: `gROOT->SetSelectedPad(gPad)`.

virtual void	Dump () const
	Dump contents of object on stdout.

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message.

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray.

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py).

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message.

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.

virtual const char *	GetIconName () const
	Returns mime type name of object.

virtual const char *	GetName () const
	Returns name of object.

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py).

virtual Option_t *	GetOption () const

virtual const char *	GetTitle () const
	Returns title of object.

virtual UInt_t	GetUniqueID () const
	Return the unique object id.

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.

virtual ULong_t	Hash () const
	Return hash value for this object.

Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message.

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory).

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

virtual Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout.

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification.

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.

void	operator delete (void *ptr)
	Operator delete.

void	operator delete[] (void *ptr)
	Operator delete [].

void *	operator new (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz)

void *	operator new[] (size_t sz, void *vp)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator.

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself.

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.

virtual void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself.

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list.

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename.

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out".

void	SetBit (UInt_t f)

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message.

R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message.

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.

Protected Member Functions
void	Transform (Bool_t dir, UShort_t *indexnew)
	Transform the existing fIndices.

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

Protected Attributes
UShort_t	fCurrent
	! to fasten Contains() in list mode

UShort_t *	fIndices
	[fN]

Int_t	fLastIndexQueried
	! to optimize GetEntry() in a loop

Int_t	fLastIndexReturned
	! to optimize GetEntry() in a loop

Int_t	fN
	size of fIndices for I/O =fNPassed for list, fBlockSize for bits

Int_t	fNPassed
	number of entries in the entry list (if fPassing=0 - number of entries not in the entry list

Bool_t	fPassing
	1 - stores entries that belong to the list 0 - stores entries that don't belong to the list

Int_t	fType
	0 - bits, 1 - list

Additional Inherited Members
Static Public Member Functions inherited from TObject
static Longptr_t	GetDtorOnly ()
	Return destructor only flag.

static Bool_t	GetObjectStat ()
	Get status of object stat flag.

static void	SetDtorOnly (void *obj)
	Set destructor only flag.

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }

#include <TEntryListBlock.h>

Inheritance diagram for TEntryListBlock:

[legend]

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
kBlockSize

Definition at line 61 of file TEntryListBlock.h.

Constructor & Destructor Documentation

◆ TEntryListBlock() [1/2]

TEntryListBlock::TEntryListBlock ( )

Default c-tor.

Definition at line 53 of file TEntryListBlock.cxx.

◆ TEntryListBlock() [2/2]

TEntryListBlock::TEntryListBlock ( const TEntryListBlock & eblock )

Copy c-tor.

Definition at line 68 of file TEntryListBlock.cxx.

◆ ~TEntryListBlock()

TEntryListBlock::~TEntryListBlock ( )

Destructor.

Definition at line 89 of file TEntryListBlock.cxx.

Member Function Documentation

◆ Contains()

Int_t TEntryListBlock::Contains ( Int_t entry )

True if the block contains entry #entry.

Definition at line 193 of file TEntryListBlock.cxx.

◆ Enter()

Bool_t TEntryListBlock::Enter ( Int_t entry )

If the block has already been optimized and the entries are stored as a list and not as bits, trying to enter a new entry will make the block switch to bits representation.

Definition at line 127 of file TEntryListBlock.cxx.

◆ GetEntry()

Int_t TEntryListBlock::GetEntry ( Int_t entry )

Return entry #entry.

◆ GetNPassed()

Int_t TEntryListBlock::GetNPassed ( )

Returns the number of entries, passing the selection.

In case, when the block stores entries that pass (fPassing=1) returns fNPassed

Definition at line 369 of file TEntryListBlock.cxx.

◆ GetType()

Int_t TEntryListBlock::GetType ( )

inline

Definition at line 75 of file TEntryListBlock.h.

◆ Merge()

Int_t TEntryListBlock::Merge ( TEntryListBlock * block )

Merge with the other block Returns the resulting number of entries in the block.

Definition at line 242 of file TEntryListBlock.cxx.

◆ Next()

Int_t TEntryListBlock::Next ( )

Return the next non-zero entry Faster than GetEntry() function.

Definition at line 446 of file TEntryListBlock.cxx.

◆ operator=()

TEntryListBlock & TEntryListBlock::operator= ( const TEntryListBlock & rhs )

Definition at line 98 of file TEntryListBlock.cxx.

◆ OptimizeStorage()

void TEntryListBlock::OptimizeStorage ( )

If there are < kBlockSize or >kBlockSize*15 entries, change to an array representation.

Definition at line 546 of file TEntryListBlock.cxx.

◆ Print()

void TEntryListBlock::Print ( const Option_t * option = "" ) const

virtual

Print the entries in this block.

Definition at line 492 of file TEntryListBlock.cxx.

◆ PrintWithShift()

void TEntryListBlock::PrintWithShift ( Int_t shift ) const

Print the indices of this block + shift (used from TEntryList::Print()) to print the current values.

Definition at line 503 of file TEntryListBlock.cxx.

◆ Remove()

Bool_t TEntryListBlock::Remove ( Int_t entry )

Remove entry #entry If the block has already been optimized and the entries are stored as a list and not as bits, trying to remove a new entry will make the block switch to bits representation.

Definition at line 165 of file TEntryListBlock.cxx.

◆ ResetIndices()

void TEntryListBlock::ResetIndices ( )

inline

Definition at line 74 of file TEntryListBlock.h.

◆ Transform()

void TEntryListBlock::Transform	(	Bool_t	dir,
		UShort_t *	indexnew
	)

protected

Transform the existing fIndices.

dir=0 - transform from bits to a list
dir=1 - tranform from a list to bits

Definition at line 563 of file TEntryListBlock.cxx.

Member Data Documentation

◆ fCurrent

UShort_t TEntryListBlock::fCurrent

protected

! to fasten Contains() in list mode

Definition at line 53 of file TEntryListBlock.h.

◆ fIndices

UShort_t* TEntryListBlock::fIndices

protected

[fN]

Definition at line 49 of file TEntryListBlock.h.

◆ fLastIndexQueried

Int_t TEntryListBlock::fLastIndexQueried

protected

! to optimize GetEntry() in a loop

Definition at line 54 of file TEntryListBlock.h.

◆ fLastIndexReturned

Int_t TEntryListBlock::fLastIndexReturned

protected

! to optimize GetEntry() in a loop

Definition at line 55 of file TEntryListBlock.h.

◆ fN

Int_t TEntryListBlock::fN

protected

size of fIndices for I/O =fNPassed for list, fBlockSize for bits

Definition at line 48 of file TEntryListBlock.h.

◆ fNPassed

Int_t TEntryListBlock::fNPassed

protected

number of entries in the entry list (if fPassing=0 - number of entries not in the entry list

Definition at line 46 of file TEntryListBlock.h.

◆ fPassing

Bool_t TEntryListBlock::fPassing

protected

1 - stores entries that belong to the list 0 - stores entries that don't belong to the list

Definition at line 51 of file TEntryListBlock.h.

◆ fType

Int_t TEntryListBlock::fType

protected

0 - bits, 1 - list

Definition at line 50 of file TEntryListBlock.h.

Libraries for TEntryListBlock:

[legend]

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

tree/tree/inc/TEntryListBlock.h
tree/tree/src/TEntryListBlock.cxx

Operations on blocks (see also function comments)

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ TEntryListBlock() [1/2]

◆ TEntryListBlock() [2/2]

◆ ~TEntryListBlock()

Member Function Documentation

◆ Contains()

◆ Enter()

◆ GetEntry()

◆ GetNPassed()

◆ GetType()

◆ Merge()

◆ Next()

◆ operator=()

◆ OptimizeStorage()

◆ Print()

◆ PrintWithShift()

◆ Remove()

◆ ResetIndices()

◆ Transform()

Member Data Documentation

◆ fCurrent

◆ fIndices

◆ fLastIndexQueried

◆ fLastIndexReturned

◆ fN

◆ fNPassed

◆ fPassing

◆ fType