THbookFile

class THbookFile : public TNamed

    public:

                       THbookFile()
                       THbookFile(const char* fname, Int_t lrecl = 1024)
                       THbookFile(const THbookFile&)
               virtual ~THbookFile()
          virtual void Browse(TBrowser* b)
        virtual Bool_t cd(const char* dirname = "")
        static TClass* Class()
          virtual void Close(Option_t* option = "")
      virtual TObject* Convert1D(Int_t id)
      virtual TObject* Convert2D(Int_t id)
        virtual TFile* Convert2root(const char* rootname = "", Int_t lrecl = 0, Option_t* option = "")
      virtual TObject* ConvertCWN(Int_t id)
      virtual TObject* ConvertProfile(Int_t id)
      virtual TObject* ConvertRWN(Int_t id)
                  void DeleteID(Int_t id)
      virtual TObject* FindObject(const char* name) const
      virtual TObject* FindObject(const TObject* obj) const
              TObject* Get(Int_t id)
           const char* GetCurDir() const
                 Int_t GetEntry(Int_t entry, Int_t id, Int_t atype, Float_t* x)
                 Int_t GetEntryBranch(Int_t entry, Int_t id)
                TList* GetList() const
                TList* GetListOfKeys() const
              Long64_t GetSize() const
                  void InitLeaves(Int_t id, Int_t var, TTreeFormula* formula)
       virtual TClass* IsA() const
        virtual Bool_t IsFolder() const
        virtual Bool_t IsOpen() const
          virtual void ls(const char* path = "") const
           THbookFile& operator=(const THbookFile&)
          virtual void SetBranchAddress(Int_t id, const char* bname, void* add)
          virtual void ShowMembers(TMemberInspector& insp, char* parent)
          virtual void Streamer(TBuffer& b)
                  void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

              Int_t fLun       Fortran logical unit for this file
              Int_t fLrecl     Record length in Hbook machine words
             TList* fList      list of objects in memory
             TList* fKeys      list of Hbook keys (Ids) on disk
            TString fCurDir    name of current directory
      static Bool_t fgPawInit  
      static Int_t* fgLuns     

  This class is an interface to the Hbook objects in Hbook files
  Any Hbook object (1-D, 2-D, Profile, RWN or CWN can be read
  NB: a THbookFile can only be used in READ mode
      Use the utility in $ROOTSYS/bin/h2root to convert Hbook to Root

 Example of use:
  gSystem->Load("libHbook");
  THbookFile f("myfile.hbook");
  f.ls();
  TH1F *h1 = (TH1F*)f.Get(1);  //import histogram ID=1 in h1
  h1->Fit("gaus");
  THbookTree *T = (THbookTree*)f.Get(111); //import ntuple header
  T->Print();  //show the Hbook ntuple variables
  T->Draw("x","y<0"); // as in normal TTree::Draw

  THbookFile can be browsed via TBrowser.

the constructor

  Constructor for an HBook file object

destructor

 to be implemented

 change directory to dirname

 Close the Hbook file

remove id from file and memory

 return object with name in fList in memory

 return object with pointer obj in fList in memory

 import Hbook object with identifier idd in memory

 Read in memory all columns of entry number of ntuple id from the Hbook file

 Read in memory only the branch bname

 This function is called from the first entry in TTreePlayer::InitLoop
 It analyzes the list of variables involved in the current query
 and pre-process the internal Hbook tables to speed-up the search
 at the next entries.

 Returns kTRUE in case file is open and kFALSE if file is not open.

Set branch address

 Convert the Column-Wise-Ntuple id to a Root Tree

 Convert the Row-Wise-Ntuple id to a Root Tree

 Convert an Hbook profile histogram into a Root TProfile

 the following structure is used in Hbook
    lcid points to the profile in array iq
    lcont = lq(lcid-1)
    lw    = lq(lcont)
    ln    = lq(lw)
      if option S jbyt(iq(lw),1,2) = 1
      if option I jbyt(iq(lw),1,2) = 2

 Convert an Hbook 1-d histogram into a Root TH1F

 Convert an Hbook 2-d histogram into a Root TH2F

 List contents of Hbook directory