// @(#)root/hist:$Id$
// Author: Rene Brun   18/08/95

/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

#include "v5/TF1Data.h"

#include "TH1.h"

ClassImp(ROOT::v5::TF1Data)

namespace ROOT {

   namespace v5 {
      
//______________________________________________________________________________
TF1Data::TF1Data(): ROOT::v5::TFormula(), TAttLine(), TAttFill(), TAttMarker()
{
   // F1 default constructor.

   fXmin      = 0;
   fXmax      = 0;
   fNpx       = 100;
   fType      = 0;
   fNpfits    = 0;
   fNDF       = 0;
   fNsave     = 0;
   fChisquare = 0;
   fParErrors = 0;
   fParMin    = 0;
   fParMax    = 0;
   fSave      = 0;
   fMinimum   = -1111;
   fMaximum   = -1111;
   SetFillStyle(0);
}

//______________________________________________________________________________
TF1Data::~TF1Data()
{
   // TF1 default destructor.

   if (fParMin)    delete [] fParMin;
   if (fParMax)    delete [] fParMax;
   if (fParErrors) delete [] fParErrors;
   if (fSave)      delete [] fSave;
}

//______________________________________________________________________________
void TF1Data::Streamer(TBuffer &b)
{
   // Stream a class object.

   if (b.IsReading()) {
      UInt_t R__s, R__c;
      Version_t v = b.ReadVersion(&R__s, &R__c);
      Streamer(b, v, R__s, R__c, nullptr);
   
   } else {
      // this will be needed if we want to write in old format
      //Int_t saved = 0;
      // if (fType > 0 && fNsave <= 0) { saved = 1; Save(fXmin,fXmax,0,0,0,0);}

      b.WriteClassBuffer(TF1Data::Class(),this);

      //if (saved) {delete [] fSave; fSave = 0; fNsave = 0;}
   }

}

//______________________________________________________________________________
void TF1Data::Streamer(TBuffer &b, Int_t v, UInt_t R__s, UInt_t R__c, const TClass *onfile_class)
{
   // specialized streamer function being able to read old TF1 versions as TF1Data in memory

   //printf("reading TF1Data ..- version  %d..\n",v);
   if (v > 4) {
      b.ReadClassBuffer(ROOT::v5::TF1Data::Class(), this, v, R__s, R__c, onfile_class);
      if (v == 5 && fNsave > 0) {
         //correct badly saved fSave in 3.00/06
         Int_t np = fNsave - 3;
         fSave[np]   = fSave[np-1];
         fSave[np+1] = fXmin;
         fSave[np+2] = fXmax;
      }
      return;
   }
   //====process old versions before automatic schema evolution
   ROOT::v5::TFormula::Streamer(b);
   TAttLine::Streamer(b);
   TAttFill::Streamer(b);
   TAttMarker::Streamer(b);
   if (v < 4) {
      Float_t xmin,xmax;
      b >> xmin; fXmin = xmin;
      b >> xmax; fXmax = xmax;
   } else {
      b >> fXmin;
      b >> fXmax;
      }
   b >> fNpx;
   b >> fType;
   b >> fChisquare;
   b.ReadArray(fParErrors);
   if (v > 1) {
      b.ReadArray(fParMin);
      b.ReadArray(fParMax);
   } else {
      fParMin = new Double_t[fNpar+1];
      fParMax = new Double_t[fNpar+1];
   }
   b >> fNpfits;
   if (v == 1) {
      TH1 * histogram;
      b >> histogram;
      delete histogram; //fHistogram = 0;
   }
   if (v > 1) {
      if (v < 4) {
         Float_t minimum,maximum;
         b >> minimum; fMinimum =minimum;
         b >> maximum; fMaximum =maximum;
      } else {
         b >> fMinimum;
         b >> fMaximum;
      }
   }
   if (v > 2) {
      b >> fNsave;
      if (fNsave > 0) {
         fSave = new Double_t[fNsave+10];
         b.ReadArray(fSave);
         //correct fSave limits to match new version
         fSave[fNsave]   = fSave[fNsave-1];
         fSave[fNsave+1] = fSave[fNsave+2];
         fSave[fNsave+2] = fSave[fNsave+3];
         fNsave += 3;
      } else fSave = 0;
   }
   b.CheckByteCount(R__s, R__c, TF1Data::IsA());
   //====end of old versions
}

   }  // end namespace v5
}   // end namespace ROOT