Describes a persistent version of a class.

A ROOT file contains the list of TStreamerInfo objects for all the class versions written to this file. When reading a file, all the TStreamerInfo objects are read back in memory and registered to the TClass list of TStreamerInfo. One can see the list and contents of the TStreamerInfo on a file with, e.g.,

TFile f("myfile.root");

f.ShowStreamerInfo();

f

#define f(i)

Definition RSha256.hxx:104

TFile

A ROOT file is an on-disk file, usually with extension .root, that stores objects in a file-system-li...

Definition TFile.h:53

A TStreamerInfo is a list of TStreamerElement objects (one per data member or base class). When streaming an object, the system (TClass) loops on all the TStreamerElement objects and calls the appropriate function for each element type.

Definition at line 39 of file TStreamerInfo.h.

Classes
class	TCompInfo

class	TPointerCollectionAdapter

Public Types
typedef TCompInfo	TCompInfo_t

Public Types inherited from TVirtualStreamerInfo
enum	EReadWrite { kBase = 0 , kOffsetL = 20 , kOffsetP = 40 , kCounter = 6 , kCharStar = 7 , kChar = 1 , kShort = 2 , kInt = 3 , kLong = 4 , kFloat = 5 , kDouble = 8 , kDouble32 = 9 , kLegacyChar = 10 , kUChar = 11 , kUShort = 12 , kUInt = 13 , kULong = 14 , kBits = 15 , kLong64 = 16 , kULong64 = 17 , kBool = 18 , kFloat16 = 19 , kObject = 61 , kAny = 62 , kObjectp = 63 , kObjectP = 64 , kTString = 65 , kTObject = 66 , kTNamed = 67 , kAnyp = 68 , kAnyP = 69 , kAnyPnoVT = 70 , kSTLp = 71 , kSkip = 100 , kSkipL = 120 , kSkipP = 140 , kConv = 200 , kConvL = 220 , kConvP = 240 , kSTL = ROOT::kSTLany , kSTLstring = ROOT::kSTLstring , kStreamer = 500 , kStreamLoop = 501 , kCache = 600 , kArtificial = 1000 , kCacheNew = 1001 , kCacheDelete = 1002 , kNeedObjectForVirtualBaseClass = 99997 , kMissing = 99999 , kNoType = -1 , kUnsupportedConversion = -2 , kUnset = -3 }
	EReadWrite Enumerator. More...

enum	EStatusBits { kCannotOptimize = (1ULL << ( 12 )) , kIgnoreTObjectStreamer = (1ULL << ( 13 )) , kRecovered = (1ULL << ( 14 )) , kNeedCheck = (1ULL << ( 15 )) , kIsCompiled = (1ULL << ( 16 )) , kBuildOldUsed = (1ULL << ( 17 )) , kBuildRunning = (1ULL << ( 18 )) }

enum class	EStatusBitsDupExceptions { kIgnoreTObjectStreamer = TVirtualStreamerInfo::kIgnoreTObjectStreamer }

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

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

enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }

enum	EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) }

Public Member Functions
	TStreamerInfo ()
	Status bits See TVirtualStreamerInfo::EStatusBits for the values.

	TStreamerInfo (TClass *cl)
	Create a TStreamerInfo object.

	~TStreamerInfo () override
	TStreamerInfo dtor.

void	Build (Bool_t isTransient=kFALSE) override
	Build the I/O data structure for the current class version.

void	BuildCheck (TFile *file=nullptr, Bool_t load=kTRUE) override
	Check if built and consistent with the class dictionary.

void	BuildEmulated (TFile *file) override
	Create an Emulation TStreamerInfo object.

Bool_t	BuildFor (const TClass *cl) override
	Check if we can build this for foreign class - do we have some rules to do that.

void	BuildOld () override
	rebuild the TStreamerInfo structure

void	CallShowMembers (const void *obj, TMemberInspector &insp, Bool_t isTransient) const override
	Emulated a call ShowMembers() on the obj of this class type, passing insp and parent.

void	Clear (Option_t *="") override
	If opt contains 'built', reset this StreamerInfo as if Build or BuildOld was never called on it (useful to force their re-running).

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

Bool_t	CompareContent (TClass cl, TVirtualStreamerInfo info, Bool_t warn, Bool_t complete, TFile *file) override
	Return True if the current StreamerInfo in cl or info is equivalent to this TStreamerInfo.

void	Compile () override
	loop on the TStreamerElement list regroup members with same type Store predigested information into local arrays.

void	ComputeSize ()
	Compute total size of all persistent elements of the class.

void	DeleteArray (void *p, Bool_t dtorOnly=kFALSE) override
	Destroy an array of emulated objects, with optional delete.

void	Destructor (void *p, Bool_t dtorOnly=kFALSE) override
	Emulated destructor for this class.

void	ForceWriteInfo (TFile *file, Bool_t force=kFALSE) override
	Recursively mark streamer infos for writing to a file.

TClassStreamer *	GenEmulatedClassStreamer (const char *class_name, Bool_t silent) override
	Generate emulated class streamer for a given collection class.

TVirtualCollectionProxy *	GenEmulatedProxy (const char *class_name, Bool_t silent) override
	Generate emulated collection proxy for a given class.

Int_t	GenerateHeaderFile (const char dirname, const TList subClasses=nullptr, const TList *extrainfos=nullptr) override
	Generate header file for the class described by this TStreamerInfo the function is called by TFile::MakeProject for each class in the file.

TVirtualStreamerInfo *	GenerateInfoForPair (const std::string &firstname, const std::string &secondname, bool silent, size_t hint_pair_offset, size_t hint_pair_size) override
	Generate the TClass and TStreamerInfo for the requested pair.

TVirtualStreamerInfo *	GenerateInfoForPair (const std::string &pairclassname, bool silent, size_t hint_pair_offset, size_t hint_pair_size) override
	Generate the TClass and TStreamerInfo for the requested pair.

TClassStreamer *	GenExplicitClassStreamer (const ::ROOT::Detail::TCollectionProxyInfo &info, TClass *cl) override
	Generate class streamer from static functions.

TVirtualCollectionProxy *	GenExplicitProxy (const ::ROOT::Detail::TCollectionProxyInfo &info, TClass *cl) override
	Generate proxy from static functions.

TClass *	GetActualClass (const void *obj) const override
	Assuming that obj points to (the part of) an object that is of the type described by this streamerInfo, return the actual type of the object (i.e.

UInt_t	GetCheckSum () const override

UInt_t	GetCheckSum (TClass::ECheckSum code) const
	Recalculate the checksum of this TStreamerInfo based on its code.

TClass *	GetClass () const override

Int_t	GetClassVersion () const override

Int_t	GetDataMemberOffset (TDataMember dm, TMemberStreamer &streamer) const
	Compute data member offset.

TStreamerElement *	GetElem (Int_t id) const override

TStreamerElement *	GetElement (Int_t id) const override

Int_t	GetElementOffset (Int_t id) const override

TObjArray *	GetElements () const override

Int_t	GetLength (Int_t id) const

ULongptr_t	GetMethod (Int_t id) const

Int_t	GetNdata () const

Int_t	GetNelement () const

Int_t	GetNewType (Int_t id) const

Int_t	GetNumber () const override

Int_t	GetOffset (const char *) const override
	Return the offset of the data member as indicated by this StreamerInfo.

Int_t	GetOffset (Int_t id) const override

Version_t	GetOldVersion () const override

Int_t	GetOnFileClassVersion () const override

TStreamerInfoActions::TActionSequence *	GetReadMemberWiseActions (Bool_t forCollection)

TStreamerInfoActions::TActionSequence *	GetReadObjectWiseActions ()

TStreamerInfoActions::TActionSequence *	GetReadTextActions ()

Int_t	GetSize () const override
	Return total size of all persistent elements of the class (with offsets).

Int_t	GetSizeElements () const
	Return total size of all persistent elements of the class use GetSize if you want to get the real size in memory.

TStreamerElement *	GetStreamerElement (const char *datamember, Int_t &offset) const override
	Return the StreamerElement of "datamember" inside our class or any of its base classes.

TStreamerElement *	GetStreamerElementReal (Int_t i, Int_t j) const
	Obsolete: this routine is obsolete and should not longer be used.

Int_t	GetType (Int_t id) const

template<typename T >
T	GetTypedValue (char *pointer, Int_t i, Int_t j, Int_t len) const
	Return value of element i in object at pointer.

template<typename T >
T	GetTypedValueClones (TClonesArray *clones, Int_t i, Int_t j, Int_t k, Int_t eoffset) const

template<typename T >
T	GetTypedValueSTL (TVirtualCollectionProxy *cont, Int_t i, Int_t j, Int_t k, Int_t eoffset) const
	Return value of element i in object number j in a TClonesArray and eventually element k in a sub-array.

template<typename T >
T	GetTypedValueSTLP (TVirtualCollectionProxy *cont, Int_t i, Int_t j, Int_t k, Int_t eoffset) const
	Return value of element i in object number j in a TClonesArray and eventually element k in a sub-array.

Double_t	GetValue (char *pointer, Int_t i, Int_t j, Int_t len) const

Double_t	GetValueClones (TClonesArray *clones, Int_t i, Int_t j, Int_t k, Int_t eoffset) const

Double_t	GetValueSTL (TVirtualCollectionProxy *cont, Int_t i, Int_t j, Int_t k, Int_t eoffset) const

Double_t	GetValueSTLP (TVirtualCollectionProxy *cont, Int_t i, Int_t j, Int_t k, Int_t eoffset) const

TStreamerInfoActions::TActionSequence *	GetWriteMemberWiseActions (Bool_t forCollection)

TStreamerInfoActions::TActionSequence *	GetWriteObjectWiseActions ()

TStreamerInfoActions::TActionSequence *	GetWriteTextActions ()

TClass *	IsA () const override

void	ls (Option_t *option="") const override
	List the TStreamerElement list and also the precomputed tables if option contains the string "incOrig", also prints the original (non-optimized elements in the list of compiled elements.

Bool_t	MatchLegacyCheckSum (UInt_t checksum) const
	Return true if the checksum passed as argument is one of the checksum value produced by the older checksum calculation algorithm.

void *	New (void *obj=nullptr) override
	An emulated object is created at address obj, if obj is null we allocate memory for the object.

void *	NewArray (Long_t nElements, void *ary=nullptr) override
	An array of emulated objects is created at address ary, if ary is null, we allocate memory for the array.

TVirtualStreamerInfo *	NewInfo (TClass *cl) override

void	PrintValue (const char name, char pointer, Int_t i, Int_t len, Int_t lenmax=1000) const
	print value of element i in object at pointer The function may be called in two ways: -method1 len < 0 i is assumed to be the TStreamerElement number i in StreamerInfo -method2 len >= 0 i is the type address of variable is directly pointer.

void	PrintValueClones (const char name, TClonesArray clones, Int_t i, Int_t eoffset, Int_t lenmax=1000) const
	Print value of element i in a TClonesArray.

void	PrintValueSTL (const char name, TVirtualCollectionProxy cont, Int_t i, Int_t eoffset, Int_t lenmax=1000) const
	Print value of element i in a TClonesArray.

template<class T >
Int_t	ReadBuffer (TBuffer &b, const T &arrptr, TCompInfo const const compinfo, Int_t first, Int_t last, Int_t narr=1, Int_t eoffset=0, Int_t mode=0)
	Deserialize information from buffer b into object at pointer if (arrayMode & 1) ptr is a pointer to array of pointers to the objects otherwise it is a pointer to a pointer to a single object.

template<class T >
Int_t	ReadBufferArtificial (TBuffer &b, const T &arrptr, TStreamerElement *aElement, Int_t narr, Int_t eoffset)
	Handle Artificial StreamerElement.

Int_t	ReadBufferClones (TBuffer &b, TClonesArray *clones, Int_t nc, Int_t first, Int_t eoffset)
	Read for TClonesArray.

template<class T >
Int_t	ReadBufferConv (TBuffer &b, const T &arrptr, const TCompInfo compinfo, Int_t kase, TStreamerElement aElement, Int_t narr, Int_t eoffset)
	Convert elements of a TClonesArray.

template<class T >
Int_t	ReadBufferSkip (TBuffer &b, const T &arrptr, const TCompInfo compinfo, Int_t kase, TStreamerElement aElement, Int_t narr, Int_t eoffset)
	Skip an element.

Int_t	ReadBufferSTL (TBuffer &b, TVirtualCollectionProxy *cont, Int_t nc, Int_t eoffset, Bool_t v7=kTRUE)
	The STL vector/list is deserialized from the buffer b.

void	SetCheckSum (UInt_t checksum) override

void	SetClass (TClass *cl) override
	Replace the TClass this streamerInfo is pointing to (belongs to)

void	SetClassVersion (Int_t vers) override

void	SetOnFileClassVersion (Int_t vers)

void	Streamer (TBuffer &) override
	Stream an object of class TStreamerInfo.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

void	TagFile (TFile *fFile) override
	Mark the classindex of the current file as using this TStreamerInfo.

void	Update (const TClass oldClass, TClass newClass) override
	function called by the TClass constructor when replacing an emulated class by the real class

template<class T >
Int_t	WriteBufferAux (TBuffer &b, const T &arr, TCompInfo const const compinfo, Int_t first, Int_t last, Int_t narr, Int_t eoffset, Int_t mode)
	The object at pointer is serialized to the buffer b if (arrayMode & 1) ptr is a pointer to array of pointers to the objects otherwise it is a pointer to a pointer to a single object.

Public Member Functions inherited from TVirtualStreamerInfo
	TVirtualStreamerInfo ()
	Default constructor.

	TVirtualStreamerInfo (TClass *)
	Default constructor.

virtual	~TVirtualStreamerInfo ()
	Destructor.

TClass *	IsA () const override

Bool_t	IsBuilt () const

Bool_t	IsCompiled () const

Bool_t	IsOptimized () const

Int_t	IsRecovered () const

void	Streamer (TBuffer &) override
	Stream an object of class TVirtualStreamerInfo.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TNamed &named)
	TNamed copy ctor.

	TNamed (const TString &name, const TString &title)

virtual	~TNamed ()
	TNamed destructor.

Int_t	Compare (const TObject *obj) const override
	Compare two TNamed objects.

void	Copy (TObject &named) const override
	Copy this to obj.

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.

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

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

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

Bool_t	IsSortable () const override

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

void	Print (Option_t *option="") const override
	Print TNamed name and title.

virtual void	SetName (const char *name)
	Set the name of the TNamed.

virtual void	SetNameTitle (const char name, const char title)
	Set all the TNamed parameters (name and title).

virtual void	SetTitle (const char *title="")
	Set the title of the TNamed.

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

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	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 with: `gROOT->SetSelectedPad(c1)`.

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=nullptr)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=nullptr)
	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 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 UInt_t	GetUniqueID () const
	Return the unique object id.

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

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

R__ALWAYS_INLINE Bool_t	IsZombie () const

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 (the base implementation is no-op).

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, void vp)
	Only called by placement new when throwing an exception.

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

void	operator delete[] (void ptr, void vp)
	Only called by placement new[] when throwing an exception.

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 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.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

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=nullptr, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

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

Static Public Member Functions
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static TStreamerElement *	GetCurrentElement ()
	static function returning a pointer to the current TStreamerElement fgElement points to the current TStreamerElement being read in ReadBuffer

Static Public Member Functions inherited from TVirtualStreamerInfo
static Bool_t	CanDelete ()
	static function returning true if ReadBuffer can delete object

static Bool_t	CanOptimize ()
	static function returning true if optimization can be on

static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static TVirtualStreamerInfo *	Factory ()
	Static function returning a pointer to a new TVirtualStreamerInfo object.

static TStreamerBasicType *	GetElementCounter (const char countName, TClass cl)
	Get pointer to a TStreamerBasicType in TClass *cl static function.

static const char *	GetElementCounterStart (const char *dmTitle)
	Given a comment/title declaring an array counter, for example:

static Bool_t	GetStreamMemberWise ()
	Return whether the TStreamerInfos will save the collections in "member-wise" order whenever possible.

static void	Optimize (Bool_t opt=kTRUE)
	This is a static function.

static void	SetCanDelete (Bool_t opt=kTRUE)
	This is a static function.

static void	SetFactory (TVirtualStreamerInfo *factory)
	static function: Set the StreamerInfo factory

static Bool_t	SetStreamMemberWise (Bool_t enable=kTRUE)
	Set whether the TStreamerInfos will save the collections in "member-wise" order whenever possible.

Static Public Member Functions inherited from TNamed
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TObject
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

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.

Private Member Functions
	TStreamerInfo (const TStreamerInfo &)=delete

void	AddReadAction (TStreamerInfoActions::TActionSequence readSequence, Int_t index, TCompInfo compinfo)
	Add a read action for the given element.

void	AddReadMemberWiseVecPtrAction (TStreamerInfoActions::TActionSequence readSequence, Int_t index, TCompInfo compinfo)
	Add a read action for the given element.

void	AddReadTextAction (TStreamerInfoActions::TActionSequence readSequence, Int_t index, TCompInfo compinfo)
	Add a read text action for the given element.

void	AddWriteAction (TStreamerInfoActions::TActionSequence writeSequence, Int_t index, TCompInfo compinfo)

void	AddWriteMemberWiseVecPtrAction (TStreamerInfoActions::TActionSequence writeSequence, Int_t index, TCompInfo compinfo)
	This is for streaming via a TClonesArray (or a vector of pointers of this type).

void	AddWriteTextAction (TStreamerInfoActions::TActionSequence writeSequence, Int_t index, TCompInfo compinfo)

void	DestructorImpl (void *p, Bool_t dtorOnly)
	Internal part of the destructor.

void	GenerateDeclaration (FILE fp, FILE sfp, const TList *subClasses, Bool_t top=kTRUE)
	Write the Declaration of class.

UInt_t	GenerateIncludes (FILE fp, char inclist, const TList *extrainfos)
	Add to the header file, the #include need for this class.

void	InsertArtificialElements (std::vector< const ROOT::TSchemaRule * > &rules)
	Insert new members as expressed in the array of TSchemaRule(s).

TStreamerInfo &	operator= (const TStreamerInfo &)=delete

Int_t	WriteBuffer (TBuffer &b, char *pointer, Int_t first)
	General Write.

Int_t	WriteBufferClones (TBuffer &b, TClonesArray *clones, Int_t nc, Int_t first, Int_t eoffset)
	Write for ClonesArray ('first' is an id between -1 and fNfulldata).

Int_t	WriteBufferSTL (TBuffer &b, TVirtualCollectionProxy *cont, Int_t nc)
	Write for STL container. ('first' is an id between -1 and fNfulldata).

Int_t	WriteBufferSTLPtrs (TBuffer &b, TVirtualCollectionProxy *cont, Int_t nc, Int_t first, Int_t eoffset)
	Write for STL container.

Static Private Member Functions
template<typename T >
static T	GetTypedValueAux (Int_t type, void *ladd, int k, Int_t len)
	Get the value from inside a collection.

static void	PrintValueAux (char ladd, Int_t atype, TStreamerElement aElement, Int_t aleng, Int_t *count)
	print value of element in object at pointer, type atype, leng aleng or *count The function may be called in two ways: -method1 len < 0 i is assumed to be the TStreamerElement number i in StreamerInfo -method2 len >= 0 i is the type address of variable is directly pointer.

Private Attributes
UInt_t	fCheckSum
	Checksum of original class.

TClass *	fClass
	!pointer to class

Int_t	fClassVersion
	Class version identifier.

TCompInfo *	fComp
	![fNslots with less than fElements->GetEntries()*1.5 used] Compiled info

TCompInfo **	fCompFull
	![fElements->GetEntries()]

TCompInfo **	fCompOpt
	![fNdata]

TObjArray *	fElements
	Array of TStreamerElements.

Int_t	fNdata
	!number of optimized elements

Int_t	fNfulldata
	!number of elements

Int_t	fNslots
	!total number of slots in fComp.

Int_t	fNumber
	!Unique identifier

Int_t	fNVirtualInfoLoc
	! Number of virtual info location to update.

Version_t	fOldVersion
	! Version of the TStreamerInfo object read from the file

Int_t	fOnFileClassVersion
	!Class version identifier as stored on file.

TStreamerInfoActions::TActionSequence *	fReadMemberWise
	! List of read action resulting from the compilation for use in member wise streaming.

TStreamerInfoActions::TActionSequence *	fReadMemberWiseVecPtr
	! List of read action resulting from the compilation for use in member wise streaming.

TStreamerInfoActions::TActionSequence *	fReadObjectWise
	! List of read action resulting from the compilation.

TStreamerInfoActions::TActionSequence *	fReadText
	! List of text read action resulting from the compilation, used for JSON.

Int_t	fSize
	!size of the persistent class

ULong_t *	fVirtualInfoLoc
	![fNVirtualInfoLoc] Location of the pointer to the TStreamerInfo inside the object (when emulated)

TStreamerInfoActions::TActionSequence *	fWriteMemberWise
	! List of write action resulting from the compilation for use in member wise streaming.

TStreamerInfoActions::TActionSequence *	fWriteMemberWiseVecPtr
	! List of write action resulting from the compilation for use in member wise streaming.

TStreamerInfoActions::TActionSequence *	fWriteObjectWise
	! List of write action resulting from the compilation.

TStreamerInfoActions::TActionSequence *	fWriteText
	! List of text write action resulting for the compilation, used for JSON.

Static Private Attributes
static std::atomic< Int_t >	fgCount {0}
	Number of TStreamerInfo instances.

Friends
class	TStreamerInfoActions::TActionSequence

Additional Inherited Members
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

Protected Member Functions inherited from TVirtualStreamerInfo
	TVirtualStreamerInfo (const TVirtualStreamerInfo &info)
	copy constructor

TVirtualStreamerInfo &	operator= (const TVirtualStreamerInfo &)
	assignment operator

void	ResetIsCompiled ()

void	SetIsCompiled ()

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 inherited from TVirtualStreamerInfo
Bool_t	fIsBuilt: 1
	true if the StreamerInfo has been optimized

std::atomic< Bool_t >	fIsCompiled
	true if the StreamerInfo has been 'built' (i.e. has all the StreamerElements it should have)

Bool_t	fOptimized: 1

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Static Protected Attributes inherited from TVirtualStreamerInfo
static Bool_t	fgCanDelete = kTRUE
	true if the StreamerInfo has been compiled (i.e. fully built, ready to use for streaming).

static TVirtualStreamerInfo *	fgInfoFactory = nullptr

static Bool_t	fgOptimize = kTRUE

static Bool_t	fgStreamMemberWise = kTRUE

#include <TStreamerInfo.h>

Inheritance diagram for TStreamerInfo:

[legend]

Member Typedef Documentation

◆ TCompInfo_t

typedef TCompInfo TStreamerInfo::TCompInfo_t

Definition at line 66 of file TStreamerInfo.h.

Constructor & Destructor Documentation

◆ TStreamerInfo() [1/3]

TStreamerInfo::TStreamerInfo ( const TStreamerInfo & )

privatedelete

◆ TStreamerInfo() [2/3]

TStreamerInfo::TStreamerInfo ( )

Status bits See TVirtualStreamerInfo::EStatusBits for the values.

Default ctor.

EReadWrite Enumerator See TVirtualStreamerInfo::EReadWrite for documentation and values.

Definition at line 145 of file TStreamerInfo.cxx.

◆ TStreamerInfo() [3/3]

TStreamerInfo::TStreamerInfo ( TClass * cl )

Create a TStreamerInfo object.

Definition at line 177 of file TStreamerInfo.cxx.

◆ ~TStreamerInfo()

TStreamerInfo::~TStreamerInfo ( )

override

TStreamerInfo dtor.

Definition at line 211 of file TStreamerInfo.cxx.

Member Function Documentation

◆ AddReadAction()

void TStreamerInfo::AddReadAction	(	TStreamerInfoActions::TActionSequence *	readSequence,
		Int_t	index,
		TStreamerInfo::TCompInfo *	compinfo
	)

private

Add a read action for the given element.

Definition at line 4421 of file TStreamerInfoActions.cxx.

◆ AddReadMemberWiseVecPtrAction()

void TStreamerInfo::AddReadMemberWiseVecPtrAction	(	TStreamerInfoActions::TActionSequence *	readSequence,
		Int_t	i,
		TStreamerInfo::TCompInfo *	compinfo
	)

private

Add a read action for the given element.

This is for streaming via a TClonesArray (or a vector of pointers of this type).

Definition at line 4770 of file TStreamerInfoActions.cxx.

◆ AddReadTextAction()

void TStreamerInfo::AddReadTextAction	(	TStreamerInfoActions::TActionSequence *	readSequence,
		Int_t	index,
		TStreamerInfo::TCompInfo *	compinfo
	)

private

Add a read text action for the given element.

Definition at line 4701 of file TStreamerInfoActions.cxx.

◆ AddWriteAction()

void TStreamerInfo::AddWriteAction	(	TStreamerInfoActions::TActionSequence *	writeSequence,
		Int_t	index,
		TStreamerInfo::TCompInfo *	compinfo
	)

private

Definition at line 4786 of file TStreamerInfoActions.cxx.

◆ AddWriteMemberWiseVecPtrAction()

void TStreamerInfo::AddWriteMemberWiseVecPtrAction	(	TStreamerInfoActions::TActionSequence *	writeSequence,
		Int_t	index,
		TStreamerInfo::TCompInfo *	compinfo
	)

private

This is for streaming via a TClonesArray (or a vector of pointers of this type).

Definition at line 5147 of file TStreamerInfoActions.cxx.

◆ AddWriteTextAction()

void TStreamerInfo::AddWriteTextAction	(	TStreamerInfoActions::TActionSequence *	writeSequence,
		Int_t	index,
		TStreamerInfo::TCompInfo *	compinfo
	)

private

Definition at line 5050 of file TStreamerInfoActions.cxx.

◆ Build()

void TStreamerInfo::Build ( Bool_t isTransient = kFALSE )

overridevirtual

Build the I/O data structure for the current class version.

A list of TStreamerElement derived classes is built by scanning one by one the list of data members of the analyzed class.

Implements TVirtualStreamerInfo.

Definition at line 263 of file TStreamerInfo.cxx.

◆ BuildCheck()

void TStreamerInfo::BuildCheck	(	TFile *	file = `nullptr`,
		Bool_t	load = `kTRUE`
	)

overridevirtual

Check if built and consistent with the class dictionary.

This method is called by TFile::ReadStreamerInfo.

Implements TVirtualStreamerInfo.

Definition at line 731 of file TStreamerInfo.cxx.

◆ BuildEmulated()

void TStreamerInfo::BuildEmulated ( TFile * file )

overridevirtual

Create an Emulation TStreamerInfo object.

Implements TVirtualStreamerInfo.

Definition at line 1256 of file TStreamerInfo.cxx.

◆ BuildFor()

Bool_t TStreamerInfo::BuildFor ( const TClass * cl )

overridevirtual

Check if we can build this for foreign class - do we have some rules to do that.

Implements TVirtualStreamerInfo.

Definition at line 1293 of file TStreamerInfo.cxx.

◆ BuildOld()

void TStreamerInfo::BuildOld ( )

overridevirtual

rebuild the TStreamerInfo structure

Implements TVirtualStreamerInfo.

Definition at line 1707 of file TStreamerInfo.cxx.

◆ CallShowMembers()

void TStreamerInfo::CallShowMembers	(	const void *	obj,
		TMemberInspector &	insp,
		Bool_t	isTransient
	)		const

overridevirtual

Emulated a call ShowMembers() on the obj of this class type, passing insp and parent.

Implements TVirtualStreamerInfo.

Definition at line 2754 of file TStreamerInfo.cxx.

◆ Class()

static TClass * TStreamerInfo::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TStreamerInfo::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TStreamerInfo::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 254 of file TStreamerInfo.h.

◆ Clear()

void TStreamerInfo::Clear ( Option_t * option = "" )

overridevirtual

If opt contains 'built', reset this StreamerInfo as if Build or BuildOld was never called on it (useful to force their re-running).

Implements TVirtualStreamerInfo.

Definition at line 2618 of file TStreamerInfo.cxx.

◆ Clone()

TObject * TStreamerInfo::Clone ( const char * newname = "" ) const

overridevirtual

Make a clone of an object using the Streamer facility.

If newname is specified, this will be the name of the new object.

Reimplemented from TNamed.

Definition at line 2820 of file TStreamerInfo.cxx.

◆ CompareContent()

Bool_t TStreamerInfo::CompareContent	(	TClass *	cl,
		TVirtualStreamerInfo *	info,
		Bool_t	warn,
		Bool_t	complete,
		TFile *	file
	)

overridevirtual

Return True if the current StreamerInfo in cl or info is equivalent to this TStreamerInfo.

In this context 'Equivalent' means the same number of persistent data member which the same actual C++ type and the same name. If 'warn' is true, Warning message are printed to explicit the differences. If 'complete' is false, stop at the first error, otherwise continue until all members have been checked.

Implements TVirtualStreamerInfo.

Definition at line 2856 of file TStreamerInfo.cxx.

◆ Compile()

void TStreamerInfo::Compile ( )

overridevirtual

loop on the TStreamerElement list regroup members with same type Store predigested information into local arrays.

This saves a huge amount of time compared to an explicit iteration on all elements.

Implements TVirtualStreamerInfo.

Definition at line 4129 of file TStreamerInfoActions.cxx.

◆ ComputeSize()

void TStreamerInfo::ComputeSize ( )

Compute total size of all persistent elements of the class.

Definition at line 3136 of file TStreamerInfo.cxx.

◆ DeclFileName()

static const char * TStreamerInfo::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 254 of file TStreamerInfo.h.

◆ DeleteArray()

void TStreamerInfo::DeleteArray	(	void *	p,
		Bool_t	dtorOnly = `kFALSE`
	)

overridevirtual

Destroy an array of emulated objects, with optional delete.

Implements TVirtualStreamerInfo.

Definition at line 5128 of file TStreamerInfo.cxx.

◆ Destructor()

void TStreamerInfo::Destructor	(	void *	obj,
		Bool_t	dtorOnly = `kFALSE`
	)

overridevirtual

Emulated destructor for this class.

An emulated object is destroyed at address p. Destruct each of the datamembers in the same order as the implicit destructor would.

Implements TVirtualStreamerInfo.

Definition at line 5102 of file TStreamerInfo.cxx.

◆ DestructorImpl()

void TStreamerInfo::DestructorImpl	(	void *	obj,
		Bool_t	dtorOnly
	)

private

Internal part of the destructor.

Destruct each of the datamembers in the same order as the implicit destructor would.

Definition at line 4969 of file TStreamerInfo.cxx.

◆ ForceWriteInfo()

void TStreamerInfo::ForceWriteInfo	(	TFile *	file,
		Bool_t	force = `kFALSE`
	)

overridevirtual

Recursively mark streamer infos for writing to a file.

Will force this TStreamerInfo to the file and also all the dependencies. If argument force > 0 the loop on class dependencies is forced. This function is called when streaming a class that contains a null pointer. In this case, the TStreamerInfo for the class with the null pointer must be written to the file and also all the TStreamerInfo of all the classes referenced by the class. We must be given a file to write to.

Implements TVirtualStreamerInfo.

Definition at line 3174 of file TStreamerInfo.cxx.

◆ GenEmulatedClassStreamer()

TClassStreamer * TStreamerInfo::GenEmulatedClassStreamer	(	const char *	class_name,
		Bool_t	silent
	)

overridevirtual

Generate emulated class streamer for a given collection class.

Implements TVirtualStreamerInfo.

Definition at line 5669 of file TStreamerInfo.cxx.

◆ GenEmulatedProxy()

TVirtualCollectionProxy * TStreamerInfo::GenEmulatedProxy	(	const char *	class_name,
		Bool_t	silent
	)

overridevirtual

Generate emulated collection proxy for a given class.

Implements TVirtualStreamerInfo.

Definition at line 5660 of file TStreamerInfo.cxx.

◆ GenerateDeclaration()

void TStreamerInfo::GenerateDeclaration	(	FILE *	fp,
		FILE *	sfp,
		const TList *	subClasses,
		Bool_t	top = `kTRUE`
	)

private

Write the Declaration of class.

Definition at line 3670 of file TStreamerInfo.cxx.

◆ GenerateHeaderFile()

Int_t TStreamerInfo::GenerateHeaderFile	(	const char *	dirname,
		const TList *	subClasses = `nullptr`,
		const TList *	extrainfos = `nullptr`
	)

overridevirtual

Generate header file for the class described by this TStreamerInfo the function is called by TFile::MakeProject for each class in the file.

Implements TVirtualStreamerInfo.

Definition at line 4009 of file TStreamerInfo.cxx.

◆ GenerateIncludes()

UInt_t TStreamerInfo::GenerateIncludes	(	FILE *	fp,
		char *	inclist,
		const TList *	extrainfos
	)

private

Add to the header file, the #include need for this class.

Definition at line 3932 of file TStreamerInfo.cxx.

◆ GenerateInfoForPair() [1/2]

TVirtualStreamerInfo * TStreamerInfo::GenerateInfoForPair	(	const std::string &	firstname,
		const std::string &	secondname,
		bool	silent,
		size_t	hint_pair_offset,
		size_t	hint_pair_size
	)

overridevirtual

Generate the TClass and TStreamerInfo for the requested pair.

This creates a TVirtualStreamerInfo for the pair and trigger the BuildCheck/Old to provoke the creation of the corresponding TClass. This relies on the dictionary for std::pair<const int, int> to already exist (or the interpreter information being available) as it is used as a template.

Note: The returned object is owned by the caller.

Implements TVirtualStreamerInfo.

Definition at line 5770 of file TStreamerInfo.cxx.

◆ GenerateInfoForPair() [2/2]

TVirtualStreamerInfo * TStreamerInfo::GenerateInfoForPair	(	const std::string &	pairclassname,
		bool	silent,
		size_t	hint_pair_offset,
		size_t	hint_pair_size
	)

overridevirtual

Generate the TClass and TStreamerInfo for the requested pair.

This creates a TVirtualStreamerInfo for the pair and trigger the BuildCheck/Old to provokes the creation of the corresponding TClass. This relies on the dictionary for std::pair<const int, int> to already exist (or the interpreter information being available) as it is used as a template.

Note: The returned object is owned by the caller.

Implements TVirtualStreamerInfo.

Definition at line 5839 of file TStreamerInfo.cxx.

◆ GenExplicitClassStreamer()

TClassStreamer * TStreamerInfo::GenExplicitClassStreamer	(	const ::ROOT::Detail::TCollectionProxyInfo &	info,
		TClass *	cl
	)

overridevirtual

Generate class streamer from static functions.

Implements TVirtualStreamerInfo.

Definition at line 5687 of file TStreamerInfo.cxx.

◆ GenExplicitProxy()

TVirtualCollectionProxy * TStreamerInfo::GenExplicitProxy	(	const ::ROOT::Detail::TCollectionProxyInfo &	info,
		TClass *	cl
	)

overridevirtual

Generate proxy from static functions.

Implements TVirtualStreamerInfo.

Definition at line 5678 of file TStreamerInfo.cxx.

◆ GetActualClass()

TClass * TStreamerInfo::GetActualClass ( const void * obj ) const

overridevirtual

Assuming that obj points to (the part of) an object that is of the type described by this streamerInfo, return the actual type of the object (i.e.

the type described by this streamerInfo is a base class of the actual type of the object. This routine should only be called if the class described by this StreamerInfo is 'emulated'.

Implements TVirtualStreamerInfo.

Definition at line 3257 of file TStreamerInfo.cxx.

◆ GetCheckSum() [1/2]

UInt_t TStreamerInfo::GetCheckSum ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 159 of file TStreamerInfo.h.

◆ GetCheckSum() [2/2]

UInt_t TStreamerInfo::GetCheckSum ( TClass::ECheckSum code ) const

Recalculate the checksum of this TStreamerInfo based on its code.

The class ckecksum is used by the automatic schema evolution algorithm to uniquely identify a class version. The check sum is built from the names/types of base classes and data members. The valid range of code is determined by ECheckSum.

kNoEnum: data members of type enum are not counted in the checksum
kNoRange: return the checksum of data members and base classes, not including the ranges and array size found in comments.
kWithTypeDef: use the sugared type name in the calculation.

This is needed for backward compatibility.

WARNING

This function must be kept in sync with TClass::GetCheckSum. They are both used to handle backward compatibility and should both return the same values. TStreamerInfo uses the information in TStreamerElement while TClass uses the information from TClass::GetListOfBases and TClass::GetListOfDataMembers. Original algorithm from Victor Perevovchikov (perev.nosp@m.@bnl.nosp@m..gov).

Definition at line 3300 of file TStreamerInfo.cxx.

◆ GetClass()

TClass * TStreamerInfo::GetClass ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 158 of file TStreamerInfo.h.

◆ GetClassVersion()

Int_t TStreamerInfo::GetClassVersion ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 161 of file TStreamerInfo.h.

◆ GetCurrentElement()

TStreamerElement * TStreamerInfo::GetCurrentElement ( )

static

static function returning a pointer to the current TStreamerElement fgElement points to the current TStreamerElement being read in ReadBuffer

Definition at line 46 of file TStreamerInfoReadBuffer.cxx.

◆ GetDataMemberOffset()

Int_t TStreamerInfo::GetDataMemberOffset	(	TDataMember *	dm,
		TMemberStreamer *&	streamer
	)		const

Compute data member offset.

Return pointer to the Streamer function if one exists

Definition at line 4124 of file TStreamerInfo.cxx.

◆ GetElem()

TStreamerElement * TStreamerInfo::GetElem ( Int_t id ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 164 of file TStreamerInfo.h.

◆ GetElement()

TStreamerElement * TStreamerInfo::GetElement ( Int_t id ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 165 of file TStreamerInfo.h.

◆ GetElementOffset()

Int_t TStreamerInfo::GetElementOffset ( Int_t id ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 166 of file TStreamerInfo.h.

◆ GetElements()

TObjArray * TStreamerInfo::GetElements ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 163 of file TStreamerInfo.h.

◆ GetLength()

Int_t TStreamerInfo::GetLength ( Int_t id ) const

inline

Definition at line 176 of file TStreamerInfo.h.

◆ GetMethod()

ULongptr_t TStreamerInfo::GetMethod ( Int_t id ) const

inline

Definition at line 177 of file TStreamerInfo.h.

◆ GetNdata()

Int_t TStreamerInfo::GetNdata ( ) const

inline

Definition at line 173 of file TStreamerInfo.h.

◆ GetNelement()

Int_t TStreamerInfo::GetNelement ( ) const

inline

Definition at line 174 of file TStreamerInfo.h.

◆ GetNewType()

Int_t TStreamerInfo::GetNewType ( Int_t id ) const

inline

Definition at line 178 of file TStreamerInfo.h.

◆ GetNumber()

Int_t TStreamerInfo::GetNumber ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 175 of file TStreamerInfo.h.

◆ GetOffset() [1/2]

Int_t TStreamerInfo::GetOffset ( const char * elementName ) const

overridevirtual

Return the offset of the data member as indicated by this StreamerInfo.

Implements TVirtualStreamerInfo.

Definition at line 4171 of file TStreamerInfo.cxx.

◆ GetOffset() [2/2]

Int_t TStreamerInfo::GetOffset ( Int_t id ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 180 of file TStreamerInfo.h.

◆ GetOldVersion()

Version_t TStreamerInfo::GetOldVersion ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 181 of file TStreamerInfo.h.

◆ GetOnFileClassVersion()

Int_t TStreamerInfo::GetOnFileClassVersion ( ) const

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 182 of file TStreamerInfo.h.

◆ GetReadMemberWiseActions()

TStreamerInfoActions::TActionSequence * TStreamerInfo::GetReadMemberWiseActions ( Bool_t forCollection )

inline

Definition at line 167 of file TStreamerInfo.h.

◆ GetReadObjectWiseActions()

TStreamerInfoActions::TActionSequence * TStreamerInfo::GetReadObjectWiseActions ( )

inline

Definition at line 168 of file TStreamerInfo.h.

◆ GetReadTextActions()

TStreamerInfoActions::TActionSequence * TStreamerInfo::GetReadTextActions ( )

inline

Definition at line 169 of file TStreamerInfo.h.

◆ GetSize()

Int_t TStreamerInfo::GetSize ( ) const

overridevirtual

Return total size of all persistent elements of the class (with offsets).

Implements TVirtualStreamerInfo.

Definition at line 4185 of file TStreamerInfo.cxx.

◆ GetSizeElements()

Int_t TStreamerInfo::GetSizeElements ( ) const

Return total size of all persistent elements of the class use GetSize if you want to get the real size in memory.

Definition at line 4194 of file TStreamerInfo.cxx.

◆ GetStreamerElement()

TStreamerElement * TStreamerInfo::GetStreamerElement	(	const char *	datamember,
		Int_t &	offset
	)		const

overridevirtual

Return the StreamerElement of "datamember" inside our class or any of its base classes.

The offset information contained in the StreamerElement is related to its immediately containing class, so we return in 'offset' the offset inside our class.

Implements TVirtualStreamerInfo.

Definition at line 4214 of file TStreamerInfo.cxx.

◆ GetStreamerElementReal()

TStreamerElement * TStreamerInfo::GetStreamerElementReal	(	Int_t	i,
		Int_t	j
	)		const

Obsolete: this routine is obsolete and should not longer be used.

TStreamerInfo holds two types of data structures

TObjArray* fElements; containing the list of all TStreamerElement objects for this class version.
ULong_t* fElem; containing the preprocessed information by TStreamerInfo::Compile In case consecutive data members are of the same type, the Compile function declares the consecutive elements as one single element in fElems.

Example with the class TAttLine:

TClass::GetClass("TAttLine")->GetStreamerInfo()->ls(); produces;
 StreamerInfo for class: TAttLine, version=1
  short        fLineColor      offset=  4 type= 2 line color
  short        fLineStyle      offset=  6 type= 2 line style
  short        fLineWidth      offset=  8 type= 2 line width
  i= 0, fLineColor      type= 22, offset=  4, len=3, method=0

For I/O implementations (eg. XML) , one has to know the original name of the data member. This function can be used to return a pointer to the original TStreamerElement object corresponding to the j-th element of a compressed array in fElems. Parameters description:

i: the serial number in array fElem
j: the element number in the array of consecutive types In the above example the class TAttLine has 3 consecutive data members of the same type "short". Compile makes one single array of 3 elements. To access the TStreamerElement for the second element of this array, one can call:
auto el = GetStreamerElementReal(0,1);

auto membername = el->GetName();

TStreamerInfo::GetStreamerElementReal
TStreamerElement * GetStreamerElementReal(Int_t i, Int_t j) const
Obsolete: this routine is obsolete and should not longer be used.
Definition TStreamerInfo.cxx:4318

This function is typically called from TBuffer, TXmlBuffer.

Definition at line 4318 of file TStreamerInfo.cxx.

◆ GetType()

Int_t TStreamerInfo::GetType ( Int_t id ) const

inline

Definition at line 187 of file TStreamerInfo.h.

◆ GetTypedValue()

template<typename T >

T TStreamerInfo::GetTypedValue	(	char *	pointer,
		Int_t	i,
		Int_t	j,
		Int_t	len
	)		const

Return value of element i in object at pointer.

The function may be called in two ways:

method1 len < 0: i is assumed to be the TStreamerElement number i in StreamerInfo
method2 len >= 0: i is the type, address of variable is directly pointer.

Definition at line 4444 of file TStreamerInfo.cxx.

◆ GetTypedValueAux()

template<typename T >

T TStreamerInfo::GetTypedValueAux	(	Int_t	type,
		void *	ladd,
		int	k,
		Int_t	len
	)

staticprivate

Get the value from inside a collection.

Definition at line 4340 of file TStreamerInfo.cxx.

◆ GetTypedValueClones()

template<typename T >

T TStreamerInfo::GetTypedValueClones	(	TClonesArray *	clones,
		Int_t	i,
		Int_t	j,
		Int_t	k,
		Int_t	eoffset
	)		const

Definition at line 4486 of file TStreamerInfo.cxx.

◆ GetTypedValueSTL()

template<typename T >

T TStreamerInfo::GetTypedValueSTL	(	TVirtualCollectionProxy *	cont,
		Int_t	i,
		Int_t	j,
		Int_t	k,
		Int_t	eoffset
	)		const

Return value of element i in object number j in a TClonesArray and eventually element k in a sub-array.

Definition at line 4508 of file TStreamerInfo.cxx.

◆ GetTypedValueSTLP()

template<typename T >

T TStreamerInfo::GetTypedValueSTLP	(	TVirtualCollectionProxy *	cont,
		Int_t	i,
		Int_t	j,
		Int_t	k,
		Int_t	eoffset
	)		const

Return value of element i in object number j in a TClonesArray and eventually element k in a sub-array.

Definition at line 4527 of file TStreamerInfo.cxx.

◆ GetValue()

Double_t TStreamerInfo::GetValue	(	char *	pointer,
		Int_t	i,
		Int_t	j,
		Int_t	len
	)		const

inline

Definition at line 192 of file TStreamerInfo.h.

◆ GetValueClones()

Double_t TStreamerInfo::GetValueClones	(	TClonesArray *	clones,
		Int_t	i,
		Int_t	j,
		Int_t	k,
		Int_t	eoffset
	)		const

inline

Definition at line 193 of file TStreamerInfo.h.

◆ GetValueSTL()

Double_t TStreamerInfo::GetValueSTL	(	TVirtualCollectionProxy *	cont,
		Int_t	i,
		Int_t	j,
		Int_t	k,
		Int_t	eoffset
	)		const

inline

Definition at line 194 of file TStreamerInfo.h.

◆ GetValueSTLP()

Double_t TStreamerInfo::GetValueSTLP	(	TVirtualCollectionProxy *	cont,
		Int_t	i,
		Int_t	j,
		Int_t	k,
		Int_t	eoffset
	)		const

inline

Definition at line 195 of file TStreamerInfo.h.

◆ GetWriteMemberWiseActions()

TStreamerInfoActions::TActionSequence * TStreamerInfo::GetWriteMemberWiseActions ( Bool_t forCollection )

inline

Definition at line 170 of file TStreamerInfo.h.

◆ GetWriteObjectWiseActions()

TStreamerInfoActions::TActionSequence * TStreamerInfo::GetWriteObjectWiseActions ( )

inline

Definition at line 171 of file TStreamerInfo.h.

◆ GetWriteTextActions()

TStreamerInfoActions::TActionSequence * TStreamerInfo::GetWriteTextActions ( )

inline

Definition at line 172 of file TStreamerInfo.h.

◆ InsertArtificialElements()

void TStreamerInfo::InsertArtificialElements ( std::vector< const ROOT::TSchemaRule * > & rules )

private

Insert new members as expressed in the array of TSchemaRule(s).

Definition at line 4543 of file TStreamerInfo.cxx.

◆ IsA()

TClass * TStreamerInfo::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TNamed.

Definition at line 254 of file TStreamerInfo.h.

◆ ls()

void TStreamerInfo::ls ( Option_t * option = "" ) const

overridevirtual

List the TStreamerElement list and also the precomputed tables if option contains the string "incOrig", also prints the original (non-optimized elements in the list of compiled elements.

Implements TVirtualStreamerInfo.

Definition at line 4686 of file TStreamerInfo.cxx.

◆ MatchLegacyCheckSum()

Bool_t TStreamerInfo::MatchLegacyCheckSum ( UInt_t checksum ) const

Return true if the checksum passed as argument is one of the checksum value produced by the older checksum calculation algorithm.

Definition at line 3272 of file TStreamerInfo.cxx.

◆ New()

void * TStreamerInfo::New ( void * obj = nullptr )

overridevirtual

An emulated object is created at address obj, if obj is null we allocate memory for the object.

Implements TVirtualStreamerInfo.

Definition at line 4771 of file TStreamerInfo.cxx.

◆ NewArray()

void * TStreamerInfo::NewArray	(	Long_t	nElements,
		void *	ary = `nullptr`
	)

overridevirtual

An array of emulated objects is created at address ary, if ary is null, we allocate memory for the array.

Implements TVirtualStreamerInfo.

Definition at line 4920 of file TStreamerInfo.cxx.

◆ NewInfo()

TVirtualStreamerInfo * TStreamerInfo::NewInfo ( TClass * cl )

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 198 of file TStreamerInfo.h.

◆ operator=()

TStreamerInfo & TStreamerInfo::operator= ( const TStreamerInfo & )

privatedelete

◆ PrintValue()

void TStreamerInfo::PrintValue	(	const char *	name,
		char *	pointer,
		Int_t	i,
		Int_t	len,
		Int_t	lenmax = `1000`
	)		const

print value of element i in object at pointer The function may be called in two ways: -method1 len < 0 i is assumed to be the TStreamerElement number i in StreamerInfo -method2 len >= 0 i is the type address of variable is directly pointer.

len is the number of elements to be printed starting at pointer.

Definition at line 5161 of file TStreamerInfo.cxx.

◆ PrintValueAux()

void TStreamerInfo::PrintValueAux	(	char *	ladd,
		Int_t	atype,
		TStreamerElement *	aElement,
		Int_t	aleng,
		Int_t *	count
	)

staticprivate

print value of element in object at pointer, type atype, leng aleng or *count The function may be called in two ways: -method1 len < 0 i is assumed to be the TStreamerElement number i in StreamerInfo -method2 len >= 0 i is the type address of variable is directly pointer.

len is the number of elements to be printed starting at pointer.

Definition at line 5431 of file TStreamerInfo.cxx.

◆ PrintValueClones()

void TStreamerInfo::PrintValueClones	(	const char *	name,
		TClonesArray *	clones,
		Int_t	i,
		Int_t	eoffset,
		Int_t	lenmax = `1000`
	)		const

Print value of element i in a TClonesArray.

Definition at line 5206 of file TStreamerInfo.cxx.

◆ PrintValueSTL()

void TStreamerInfo::PrintValueSTL	(	const char *	name,
		TVirtualCollectionProxy *	cont,
		Int_t	i,
		Int_t	eoffset,
		Int_t	lenmax = `1000`
	)		const

Print value of element i in a TClonesArray.

Definition at line 5231 of file TStreamerInfo.cxx.

◆ ReadBuffer()

template<class T >

template Int_t TStreamerInfo::ReadBuffer< TVirtualArray >	(	TBuffer &	b,
		const T &	arrptr,
		TCompInfo const const	compinfo,
		Int_t	first,
		Int_t	last,
		Int_t	narr = `1`,
		Int_t	eoffset = `0`,
		Int_t	mode = `0`
	)

Deserialize information from buffer b into object at pointer if (arrayMode & 1) ptr is a pointer to array of pointers to the objects otherwise it is a pointer to a pointer to a single object.

This also means that T is of a type such that arr[i] is a pointer to an object. Currently the only anticipated instantiation are for T==char** and T==TVirtualCollectionProxy

Definition at line 753 of file TStreamerInfoReadBuffer.cxx.

◆ ReadBufferArtificial()

template<class T >

template Int_t TStreamerInfo::ReadBufferArtificial< TVirtualArray >	(	TBuffer &	b,
		const T &	arrptr,
		TStreamerElement *	aElement,
		Int_t	narr,
		Int_t	eoffset
	)

Handle Artificial StreamerElement.

Definition at line 526 of file TStreamerInfoReadBuffer.cxx.

◆ ReadBufferClones()

Int_t TStreamerInfo::ReadBufferClones	(	TBuffer &	b,
		TClonesArray *	clones,
		Int_t	nc,
		Int_t	first,
		Int_t	eoffset
	)

Read for TClonesArray.

Note: This is no longer used.

Definition at line 1794 of file TStreamerInfoReadBuffer.cxx.

◆ ReadBufferConv()

template<class T >

template Int_t TStreamerInfo::ReadBufferConv< TVirtualArray >	(	TBuffer &	b,
		const T &	arrptr,
		const TCompInfo *	compinfo,
		Int_t	kase,
		TStreamerElement *	aElement,
		Int_t	narr,
		Int_t	eoffset
	)

Convert elements of a TClonesArray.

Definition at line 568 of file TStreamerInfoReadBuffer.cxx.

◆ ReadBufferSkip()

template<class T >

template Int_t TStreamerInfo::ReadBufferSkip< TVirtualArray >	(	TBuffer &	b,
		const T &	arrptr,
		const TCompInfo *	compinfo,
		Int_t	kase,
		TStreamerElement *	aElement,
		Int_t	narr,
		Int_t	eoffset
	)

Skip an element.

Definition at line 182 of file TStreamerInfoReadBuffer.cxx.

◆ ReadBufferSTL()

Int_t TStreamerInfo::ReadBufferSTL	(	TBuffer &	b,
		TVirtualCollectionProxy *	cont,
		Int_t	nc,
		Int_t	eoffset,
		Bool_t	v7 = `kTRUE`
	)

The STL vector/list is deserialized from the buffer b.

Definition at line 1782 of file TStreamerInfoReadBuffer.cxx.

◆ SetCheckSum()

void TStreamerInfo::SetCheckSum ( UInt_t checksum )

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 218 of file TStreamerInfo.h.

◆ SetClass()

void TStreamerInfo::SetClass ( TClass * cl )

overridevirtual

Replace the TClass this streamerInfo is pointing to (belongs to)

Implements TVirtualStreamerInfo.

Definition at line 5256 of file TStreamerInfo.cxx.

◆ SetClassVersion()

void TStreamerInfo::SetClassVersion ( Int_t vers )

inlineoverridevirtual

Implements TVirtualStreamerInfo.

Definition at line 220 of file TStreamerInfo.h.

◆ SetOnFileClassVersion()

void TStreamerInfo::SetOnFileClassVersion ( Int_t vers )

inline

Definition at line 221 of file TStreamerInfo.h.

◆ Streamer()

void TStreamerInfo::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TStreamerInfo.

Reimplemented from TNamed.

Definition at line 5268 of file TStreamerInfo.cxx.

◆ StreamerNVirtual()

void TStreamerInfo::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 254 of file TStreamerInfo.h.

◆ TagFile()

void TStreamerInfo::TagFile ( TFile * file )

overridevirtual

Mark the classindex of the current file as using this TStreamerInfo.

This function is deprecated and its functionality is now done by the overloads of TBuffer::TagStreamerInfo.

Implements TVirtualStreamerInfo.

Definition at line 5379 of file TStreamerInfo.cxx.

◆ Update()

void TStreamerInfo::Update	(	const TClass *	oldClass,
		TClass *	newClass
	)

overridevirtual

function called by the TClass constructor when replacing an emulated class by the real class

Implements TVirtualStreamerInfo.

Definition at line 5631 of file TStreamerInfo.cxx.

◆ WriteBuffer()

Int_t TStreamerInfo::WriteBuffer	(	TBuffer &	b,
		char *	ipointer,
		Int_t	first
	)

private

General Write.

('first' is an id between -1 and fNdata). Note: This is no longer used.

Definition at line 863 of file TStreamerInfoWriteBuffer.cxx.

◆ WriteBufferAux()

template<class T >

template Int_t TStreamerInfo::WriteBufferAux< char ** >	(	TBuffer &	b,
		const T &	arr,
		TCompInfo const const	compinfo,
		Int_t	first,
		Int_t	last,
		Int_t	narr,
		Int_t	eoffset,
		Int_t	mode
	)

The object at pointer is serialized to the buffer b if (arrayMode & 1) ptr is a pointer to array of pointers to the objects otherwise it is a pointer to a pointer to a single object.

This also means that T is of a type such that arr[i] is a pointer to an object. Currently the only anticipated instantiation are for T==char** and T==TVirtualCollectionProxy

Definition at line 114 of file TStreamerInfoWriteBuffer.cxx.

◆ WriteBufferClones()

Int_t TStreamerInfo::WriteBufferClones	(	TBuffer &	b,
		TClonesArray *	clones,
		Int_t	nc,
		Int_t	first,
		Int_t	eoffset
	)

private

Write for ClonesArray ('first' is an id between -1 and fNfulldata).

Note: This is no longer used.

Definition at line 872 of file TStreamerInfoWriteBuffer.cxx.

◆ WriteBufferSTL()

Int_t TStreamerInfo::WriteBufferSTL	(	TBuffer &	b,
		TVirtualCollectionProxy *	cont,
		Int_t	nc
	)

private

Write for STL container. ('first' is an id between -1 and fNfulldata).

Definition at line 836 of file TStreamerInfoWriteBuffer.cxx.

◆ WriteBufferSTLPtrs()

Int_t TStreamerInfo::WriteBufferSTLPtrs	(	TBuffer &	b,
		TVirtualCollectionProxy *	cont,
		Int_t	nc,
		Int_t	first,
		Int_t	eoffset
	)

private

Write for STL container.

('first' is an id between -1 and fNfulldata). Note: This is no longer used.

Definition at line 850 of file TStreamerInfoWriteBuffer.cxx.

Friends And Related Symbol Documentation

◆ TStreamerInfoActions::TActionSequence

friend class TStreamerInfoActions::TActionSequence

friend

Definition at line 62 of file TStreamerInfo.h.

Member Data Documentation

◆ fCheckSum

UInt_t TStreamerInfo::fCheckSum

private

Checksum of original class.

Definition at line 88 of file TStreamerInfo.h.

◆ fClass

TClass* TStreamerInfo::fClass

private

!pointer to class

Definition at line 99 of file TStreamerInfo.h.

◆ fClassVersion

Int_t TStreamerInfo::fClassVersion

private

Class version identifier.

Definition at line 89 of file TStreamerInfo.h.

◆ fComp

TCompInfo* TStreamerInfo::fComp

private

![fNslots with less than fElements->GetEntries()*1.5 used] Compiled info

Definition at line 96 of file TStreamerInfo.h.

◆ fCompFull

TCompInfo** TStreamerInfo::fCompFull

private

![fElements->GetEntries()]

Definition at line 98 of file TStreamerInfo.h.

◆ fCompOpt

TCompInfo** TStreamerInfo::fCompOpt

private

![fNdata]

Definition at line 97 of file TStreamerInfo.h.

◆ fElements

TObjArray* TStreamerInfo::fElements

private

Array of TStreamerElements.

Definition at line 100 of file TStreamerInfo.h.

◆ fgCount

std::atomic< Int_t > TStreamerInfo::fgCount {0}

staticprivate

Number of TStreamerInfo instances.

Definition at line 113 of file TStreamerInfo.h.

◆ fNdata

Int_t TStreamerInfo::fNdata

private

!number of optimized elements

Definition at line 93 of file TStreamerInfo.h.

◆ fNfulldata

Int_t TStreamerInfo::fNfulldata

private

!number of elements

Definition at line 94 of file TStreamerInfo.h.

◆ fNslots

Int_t TStreamerInfo::fNslots

private

!total number of slots in fComp.

Definition at line 95 of file TStreamerInfo.h.

◆ fNumber

Int_t TStreamerInfo::fNumber

private

!Unique identifier

Definition at line 91 of file TStreamerInfo.h.

◆ fNVirtualInfoLoc

Int_t TStreamerInfo::fNVirtualInfoLoc

private

! Number of virtual info location to update.

Definition at line 102 of file TStreamerInfo.h.

◆ fOldVersion

Version_t TStreamerInfo::fOldVersion

private

! Version of the TStreamerInfo object read from the file

Definition at line 101 of file TStreamerInfo.h.

◆ fOnFileClassVersion

Int_t TStreamerInfo::fOnFileClassVersion

private

!Class version identifier as stored on file.

Definition at line 90 of file TStreamerInfo.h.

◆ fReadMemberWise

TStreamerInfoActions::TActionSequence* TStreamerInfo::fReadMemberWise

private

! List of read action resulting from the compilation for use in member wise streaming.

Definition at line 105 of file TStreamerInfo.h.

◆ fReadMemberWiseVecPtr

TStreamerInfoActions::TActionSequence* TStreamerInfo::fReadMemberWiseVecPtr

private

! List of read action resulting from the compilation for use in member wise streaming.

Definition at line 106 of file TStreamerInfo.h.

◆ fReadObjectWise

TStreamerInfoActions::TActionSequence* TStreamerInfo::fReadObjectWise

private

! List of read action resulting from the compilation.

Definition at line 104 of file TStreamerInfo.h.

◆ fReadText

TStreamerInfoActions::TActionSequence* TStreamerInfo::fReadText

private

! List of text read action resulting from the compilation, used for JSON.

Definition at line 107 of file TStreamerInfo.h.

◆ fSize

Int_t TStreamerInfo::fSize

private

!size of the persistent class

Definition at line 92 of file TStreamerInfo.h.

◆ fVirtualInfoLoc

ULong_t* TStreamerInfo::fVirtualInfoLoc

private

![fNVirtualInfoLoc] Location of the pointer to the TStreamerInfo inside the object (when emulated)

Definition at line 103 of file TStreamerInfo.h.

◆ fWriteMemberWise

TStreamerInfoActions::TActionSequence* TStreamerInfo::fWriteMemberWise

private

! List of write action resulting from the compilation for use in member wise streaming.

Definition at line 109 of file TStreamerInfo.h.

◆ fWriteMemberWiseVecPtr

TStreamerInfoActions::TActionSequence* TStreamerInfo::fWriteMemberWiseVecPtr

private

! List of write action resulting from the compilation for use in member wise streaming.

Definition at line 110 of file TStreamerInfo.h.

◆ fWriteObjectWise

TStreamerInfoActions::TActionSequence* TStreamerInfo::fWriteObjectWise

private

! List of write action resulting from the compilation.

Definition at line 108 of file TStreamerInfo.h.

◆ fWriteText

TStreamerInfoActions::TActionSequence* TStreamerInfo::fWriteText

private

! List of text write action resulting for the compilation, used for JSON.

Definition at line 111 of file TStreamerInfo.h.

Libraries for TStreamerInfo:

[legend]

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

Classes

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Friends

Additional Inherited Members

Member Typedef Documentation

◆ TCompInfo_t

Constructor & Destructor Documentation

◆ TStreamerInfo() [1/3]

◆ TStreamerInfo() [2/3]

◆ TStreamerInfo() [3/3]

◆ ~TStreamerInfo()

Member Function Documentation

◆ AddReadAction()

◆ AddReadMemberWiseVecPtrAction()

◆ AddReadTextAction()

◆ AddWriteAction()

◆ AddWriteMemberWiseVecPtrAction()

◆ AddWriteTextAction()

◆ Build()

◆ BuildCheck()

◆ BuildEmulated()

◆ BuildFor()

◆ BuildOld()

◆ CallShowMembers()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ Clear()

◆ Clone()

◆ CompareContent()

◆ Compile()

◆ ComputeSize()

◆ DeclFileName()

◆ DeleteArray()

◆ Destructor()

◆ DestructorImpl()

◆ ForceWriteInfo()

◆ GenEmulatedClassStreamer()

◆ GenEmulatedProxy()

◆ GenerateDeclaration()

◆ GenerateHeaderFile()

◆ GenerateIncludes()

◆ GenerateInfoForPair() [1/2]

◆ GenerateInfoForPair() [2/2]

◆ GenExplicitClassStreamer()

◆ GenExplicitProxy()

◆ GetActualClass()

◆ GetCheckSum() [1/2]

◆ GetCheckSum() [2/2]

WARNING

◆ GetClass()

◆ GetClassVersion()

◆ GetCurrentElement()

◆ GetDataMemberOffset()

◆ GetElem()

◆ GetElement()

◆ GetElementOffset()

◆ GetElements()

◆ GetLength()

◆ GetMethod()

◆ GetNdata()

◆ GetNelement()

◆ GetNewType()

◆ GetNumber()

◆ GetOffset() [1/2]

◆ GetOffset() [2/2]

◆ GetOldVersion()

◆ GetOnFileClassVersion()

◆ GetReadMemberWiseActions()

◆ GetReadObjectWiseActions()

◆ GetReadTextActions()

◆ GetSize()

◆ GetSizeElements()

◆ GetStreamerElement()