// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_rroot_streamers
#define tools_rroot_streamers

#include "dummy_fac"

#include "named"
#include "date"
#include "directory"
#include "clss"
#include "dummy"
#include "obj_list"

#include "../sout"
#include "../vmanip"

#include "../histo/profile_data"

#include "../histo/h1d"
#include "../histo/h2d"
#include "../histo/h3d"
#include "../histo/p1d"
#include "../histo/p2d"

#include <list>
#include <cmath> //::log10, ::fabs.
#include <utility>

namespace tools {
namespace rroot {

typedef histo::histo_data<double,unsigned int,unsigned int,double> hd_data;
typedef histo::profile_data<double,unsigned int,unsigned int,double,double> pd_data;

inline bool AttAxis_stream(buffer& a_buffer){
    int fNdivisions = 510;       //Number of divisions(10000*n3 + 100*n2 + n1)
    short fAxisColor = 1;        //color of the line axis
    short fLabelColor = 1;       //color of labels
    short fLabelFont = 62;       //font for labels
    float fLabelOffset = 0.005F; //offset of labels
    float fLabelSize = 0.04F;    //size of labels
    float fTickLength = 0.03F;   //length of tick marks
    float fTitleOffset = 1;      //offset of axis title
    float fTitleSize = 0.04F;    //size of axis title
    short fTitleColor = 1;       //color of axis title
    short fTitleFont = 62;       //font for axis title

    // Version 4 streaming (ROOT/v3-00-6).
    short v;
    unsigned int _s,_c;
    if(!a_buffer.read_version(v,_s,_c)) return false;

    if(!a_buffer.read(fNdivisions)) return false;
    if(!a_buffer.read(fAxisColor)) return false;
    if(!a_buffer.read(fLabelColor)) return false;
    if(!a_buffer.read(fLabelFont)) return false;
    if(!a_buffer.read(fLabelOffset)) return false;
    if(!a_buffer.read(fLabelSize)) return false;
    if(!a_buffer.read(fTickLength)) return false;
    if(!a_buffer.read(fTitleOffset)) return false;
    if(!a_buffer.read(fTitleSize)) return false;
    if(!a_buffer.read(fTitleColor)) return false;
    if(!a_buffer.read(fTitleFont)) return false;

    if(!a_buffer.check_byte_count(_s,_c,"TAttAxis")) return false;
    return true;
}

inline bool Axis_stream(buffer& a_buffer,histo::axis<double,unsigned int>& a_fAxis){
    // Version 6 streaming (ROOT/v3-00-6).
    short v;
    unsigned int _s,_c;
    if(!a_buffer.read_version(v,_s,_c)) return false;

    std::string name;
    std::string title;
    if(!Named_stream(a_buffer,name,title)) return false;

    if(!AttAxis_stream(a_buffer)) return false;

    int number;
    if(!a_buffer.read(number)) return false;
    double min;
    if(!a_buffer.read(min)) return false;
    double max;
    if(!a_buffer.read(max)) return false;

    std::vector<double> edges;
    if(!Array_stream<double>(a_buffer,edges)) return false; //fXbins TArrayD

    size_t edgen = edges.size();
    if(!edgen) {
      a_fAxis.configure(number,min,max);
    } else {
      std::vector<double> vedges;
      for(size_t index=0;index<edgen;index++) {
        vedges.push_back(edges[index]);
      }
      a_fAxis.configure(vedges);
    }

    int First;
    if(!a_buffer.read(First)) return false;
    int Last;
    if(!a_buffer.read(Last)) return false;

    if(v>=8) { //fBits2.
      unsigned short dummy;
      if(!a_buffer.read(dummy)) return false;
    }

    //Bool_t
    unsigned char TimeDisplay;
    if(!a_buffer.read(TimeDisplay)) return false;

    //TString
    std::string TimeFormat;
    if(!a_buffer.read(TimeFormat)) return false;

    if(v>=7) {
      //THashList*
      dummy_fac fac(a_buffer.out());
      if(!dummy_TXxx_pointer_stream(a_buffer,fac)) return false;
    }

    if(!a_buffer.check_byte_count(_s,_c,"TAxis")) return false;
    return true;
}

inline bool null_epsil(double a_1,double a_2,double a_prec = -5) {
  return (::log10(::fabs(a_1-a_2))<a_prec?true:false);
}

inline bool TH_read_1D(buffer& a_buffer,hd_data& a_data,
                       double& a_entries,double& a_Sw,double& a_Sw2,double& a_Sxw,double& a_Sx2w){
    a_entries = 0;
    a_Sw = 0;
    a_Sw2 = 0;
    a_Sxw = 0;
    a_Sx2w = 0;

    unsigned int _s,_c;
    short vers;
    if(!a_buffer.read_version(vers,_s,_c)) return false;

    // Version 3 streaming (ROOT/v3-00-6).

    std::string name;
    std::string title;
    if(!Named_stream(a_buffer,name,title)) return false;

    a_data.m_title = std::move(title);

   {short color,style,width;
    if(!AttLine_stream(a_buffer,color,style,width)) return false;}
   {short color,style;
    if(!AttFill_stream(a_buffer,color,style)) return false;}
    if(!AttMarker_stream(a_buffer)) return false;

    int Ncells;
    if(!a_buffer.read(Ncells)) return false;

    //fXAxis
    if(!Axis_stream(a_buffer,a_data.m_axes[0])) return false;
    a_data.m_axes[0].m_offset = 1;

    if(a_data.m_dimension==3) {
      if(!Axis_stream(a_buffer,a_data.m_axes[1])) return false; //fYAxis
      a_data.m_axes[1].m_offset = a_data.m_axes[0].m_offset * (a_data.m_axes[0].bins()+2);

      if(!Axis_stream(a_buffer,a_data.m_axes[2])) return false; //fZAxis
      a_data.m_axes[2].m_offset = a_data.m_axes[1].m_offset * (a_data.m_axes[1].bins()+2);

    } else if(a_data.m_dimension==2) {
      if(!Axis_stream(a_buffer,a_data.m_axes[1])) return false; //fYAxis
      a_data.m_axes[1].m_offset = a_data.m_axes[0].m_offset * (a_data.m_axes[0].bins()+2);

      histo::axis<double,unsigned int> dummy;
      if(!Axis_stream(a_buffer,dummy)) return false; //fZAxis
    } else {
      histo::axis<double,unsigned int> dummy;
      if(!Axis_stream(a_buffer,dummy)) return false; //fYAxis
      if(!Axis_stream(a_buffer,dummy)) return false; //fZAxis
    }

    short barOffset;
    if(!a_buffer.read(barOffset)) return false;

    short barWidth;
    if(!a_buffer.read(barWidth)) return false;

    if(!a_buffer.read(a_entries)) return false;

    if(!a_buffer.read(a_Sw)) return false; //fTsumw

    if(!a_buffer.read(a_Sw2)) return false;

    if(!a_buffer.read(a_Sxw)) return false;

    if(!a_buffer.read(a_Sx2w)) return false;

    double max;
    if(!a_buffer.read(max)) return false;

    double min;
    if(!a_buffer.read(min)) return false;

    double NormFactor;
    if(!a_buffer.read(NormFactor)) return false;

   {std::vector<double> v;
    if(!Array_stream<double>(a_buffer,v)) return false;} //fContour TArrayD

    std::vector<double> sumw2; //fSumw2 TArrayD
    if(!Array_stream<double>(a_buffer,sumw2)) return false;

   {std::string opt;
    if(!a_buffer.read(opt)) return false; //TString fOption
    }

   {dummy_fac fac(a_buffer.out());
    obj_list dummy(fac);
    if(!dummy.stream(a_buffer)) {
      a_buffer.out() << "tools::rroot::TH_read_1D :"
                     << " obj_list stream failed."
                     << std::endl;
      return false;
    }} //Functions

    if(vers>=4) {
      int BufferSize;
      if(!a_buffer.read(BufferSize)) return false;

      //Double_t* Buffer; //[fBufferSize]
      if(!dummy_array_stream<double>(a_buffer,BufferSize)) return false;
    }

    if(vers>=7) {
      //EBinErrorOpt  fBinStatErrOpt;
      int dummy;
      if(!a_buffer.read(dummy)) return false;
    }

    // Add two for outflows.
    if(a_data.m_dimension==1) {
      a_data.m_bin_number = a_data.m_axes[0].m_number_of_bins + 2;
    } else if(a_data.m_dimension==2) {
      a_data.m_bin_number =
        (a_data.m_axes[0].m_number_of_bins + 2) *
	(a_data.m_axes[1].m_number_of_bins + 2);
    } else if(a_data.m_dimension==3) {
      a_data.m_bin_number =
        (a_data.m_axes[0].m_number_of_bins + 2) *
	(a_data.m_axes[1].m_number_of_bins + 2) *
	(a_data.m_axes[2].m_number_of_bins + 2);
    }

    unsigned int binn = a_data.m_bin_number;
    a_data.m_bin_Sw2.resize(binn);
    if(binn==sumw2.size()) {
      for(unsigned int index=0;index<binn;index++){
        a_data.m_bin_Sw2[index] = sumw2[index];
      }
    } else {
      a_data.m_bin_Sw2.assign(binn,0);
    }

    if(!a_buffer.check_byte_count(_s,_c,"TH")) return false;

    return true;
}


inline bool TH_read_2D(buffer& a_buffer,hd_data& a_data,
                       double& a_entries,double& a_Sw,double& a_Sw2,
                       double& a_Sxw,double& a_Sx2w,double& a_Syw,double& a_Sy2w){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return false;

    // Version 3 streaming (ROOT/v3-00-6).

    if(!TH_read_1D(a_buffer,a_data,a_entries,a_Sw,a_Sw2,a_Sxw,a_Sx2w)) return false;
    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    double ScaleFactor;
    if(!a_buffer.read(ScaleFactor)) return false;
    if(!a_buffer.read(a_Syw)) return false;
    if(!a_buffer.read(a_Sy2w)) return false;

    double Tsumwxy;
    if(!a_buffer.read(Tsumwxy)) return false;
    a_data.m_in_range_plane_Sxyw[0] = Tsumwxy;

    if(!a_buffer.check_byte_count(_s,_c,"TH2")) return false;

    return true;
}

inline bool TH_read_3D(buffer& a_buffer,hd_data& a_data,
                       double& a_entries,double& a_Sw,double& a_Sw2,
                       double& a_Sxw,double& a_Sx2w,
                       double& a_Syw,double& a_Sy2w,
                       double& a_Szw,double& a_Sz2w){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return false;

    if(!TH_read_1D(a_buffer,a_data,a_entries,a_Sw,a_Sw2,a_Sxw,a_Sx2w)) return false;
    if(!Att3D_stream(a_buffer)) return false;

    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    if(!a_buffer.read(a_Syw)) return false;
    if(!a_buffer.read(a_Sy2w)) return false;
    double Tsumwxy;
    if(!a_buffer.read(Tsumwxy)) return false;

    if(!a_buffer.read(a_Szw)) return false;
    if(!a_buffer.read(a_Sz2w)) return false;
    double Tsumwxz;
    if(!a_buffer.read(Tsumwxz)) return false;
    double Tsumwyz;
    if(!a_buffer.read(Tsumwyz)) return false;

    a_data.m_in_range_plane_Sxyw[0] = Tsumwxy;
    a_data.m_in_range_plane_Sxyw[1] = Tsumwyz;
    a_data.m_in_range_plane_Sxyw[2] = Tsumwxz;

    if(!a_buffer.check_byte_count(_s,_c,"TH3")) return false;

    return true;
}

inline histo::h1d* TH1F_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Version 1 streaming (ROOT/v3-00-6).

    // Now we have to reconstruct a valid Histogram from a_buffer :
    hd_data data;

    data.m_dimension = 1;
    data.m_axes.resize(1);

    double fEntries; //in range + outflow.
    double fSw;      //in range.
    double fSw2;     //in range.
    double fSxw;     //in range.
    double fSx2w;    //in range.
    if(!TH_read_1D(a_buffer,data,fEntries,fSw,fSw2,fSxw,fSx2w)) return 0;
    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    std::vector<float> bins; //fArray TArrayF
    if(!Array_stream<float>(a_buffer,bins)) return 0;
    if(!a_buffer.check_byte_count(_s,_c,"TH1F")) return 0;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Sw.resize(binn,0);
   {for(unsigned int index=0;index<binn;index++){
      data.m_bin_Sw[index] = double(bins[index]);
    }}

    data.m_bin_entries.resize(binn,0);
   {std::vector<double> empty;
    empty.resize(1,0);
    data.m_bin_Sxw.resize(binn,empty);
    data.m_bin_Sx2w.resize(binn,empty);}
    data.m_all_entries = static_cast<unsigned int>(fEntries);
    data.m_in_range_entries = 0;
    data.m_in_range_Sw = fSw;
    data.m_in_range_Sw2 = fSw2;
    data.m_in_range_Sxw.resize(1,0);
    data.m_in_range_Sx2w.resize(1,0);
    data.m_in_range_Sxw[0] = fSxw;
    data.m_in_range_Sx2w[0] = fSx2w;

    histo::h1d* h = new histo::h1d("",10,0,1);
    h->copy_from_data(data);
    return h; //give ownership to caller.
}

inline histo::h1d* TH1D_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Version 1 streaming (ROOT/v3-00-6).

    // Now we have to reconstruct a valid Histogram from a_buffer :
    hd_data data;

    data.m_dimension = 1;
    data.m_axes.resize(1);

    double fEntries; //in range + outflow.
    double fSw;      //in range.
    double fSw2;     //in range.
    double fSxw;     //in range.
    double fSx2w;    //in range.
    if(!TH_read_1D(a_buffer,data,fEntries,fSw,fSw2,fSxw,fSx2w)) return 0;
    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    std::vector<double> bins; //fArray TArrayD
    if(!Array_stream<double>(a_buffer,bins)) return 0;
    if(!a_buffer.check_byte_count(_s,_c,"TH1D")) return 0;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Sw = std::move(bins);

    data.m_bin_entries.resize(binn,0);
   {std::vector<double> empty;
    empty.resize(1,0);
    data.m_bin_Sxw.resize(binn,empty);
    data.m_bin_Sx2w.resize(binn,empty);}

    data.m_all_entries = static_cast<unsigned int>(fEntries);
    data.m_in_range_entries = 0;
    data.m_in_range_Sw = fSw;
    data.m_in_range_Sw2 = fSw2;
    data.m_in_range_Sxw.resize(1,0);
    data.m_in_range_Sx2w.resize(1,0);
    data.m_in_range_Sxw[0] = fSxw;
    data.m_in_range_Sx2w[0] = fSx2w;

    histo::h1d* h = new histo::h1d("",10,0,1);
    h->copy_from_data(data);
    return h;
}

inline histo::h2d* TH2F_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Version 3 streaming (ROOT/v3-00-6).

    // Now we have to reconstruct a valid Histogram from a_buffer :
    hd_data data;

    data.m_dimension = 2;
    //data.m_coords.resize(data.m_dimension,0);
    //data.m_ints.resize(data.m_dimension,0);
    data.m_axes.resize(2);
    data.m_in_range_plane_Sxyw.resize(1,0);

    double fEntries; //in range + outflow.
    double fSw;      //in range.
    double fSw2;     //in range.
    double fSxw;     //in range.
    double fSx2w;    //in range.
    double fSyw;     //in range.
    double fSy2w;    //in range.
    if(!TH_read_2D(a_buffer,data,fEntries,fSw,fSw2,fSxw,fSx2w,fSyw,fSy2w)) return 0;
    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    std::vector<float> bins; //fArray TArrayF
    if(!Array_stream<float>(a_buffer,bins)) return 0;
    if(!a_buffer.check_byte_count(_s,_c,"TH2F")) return 0;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Sw.resize(binn,0);
   {for(unsigned int index=0;index<binn;index++){
      data.m_bin_Sw[index] = double(bins[index]);
    }}

    data.m_bin_entries.resize(binn,0);
   {std::vector<double> empty;
    empty.resize(2,0);
    data.m_bin_Sxw.resize(binn,empty);
    data.m_bin_Sx2w.resize(binn,empty);}

    data.m_all_entries = static_cast<unsigned int>(fEntries);
    data.m_in_range_entries = 0;
    data.m_in_range_Sw = fSw;
    data.m_in_range_Sw2 = fSw2;
    data.m_in_range_Sxw.resize(2,0);
    data.m_in_range_Sx2w.resize(2,0);
    data.m_in_range_Sxw[0] = fSxw;
    data.m_in_range_Sx2w[0] = fSx2w;
    data.m_in_range_Sxw[1] = fSyw;
    data.m_in_range_Sx2w[1] = fSy2w;

    histo::h2d* h = new histo::h2d("",10,0,1,10,0,1);
    h->copy_from_data(data);
    return h;
}

inline histo::h2d* TH2D_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Version 3 streaming (ROOT/v3-00-6).

    // Now we have to reconstruct a valid Histogram from a_buffer :
    hd_data data;

    data.m_dimension = 2;
    data.m_axes.resize(2);
    data.m_in_range_plane_Sxyw.resize(1,0);

    double fEntries; //in range + outflow.
    double fSw;      //in range.
    double fSw2;     //in range.
    double fSxw;     //in range.
    double fSx2w;    //in range.
    double fSyw;     //in range.
    double fSy2w;    //in range.
    if(!TH_read_2D(a_buffer,data,fEntries,fSw,fSw2,fSxw,fSx2w,fSyw,fSy2w)) return 0;
    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    std::vector<double> bins; //fArray TArrayD
    if(!Array_stream<double>(a_buffer,bins)) return 0;
    if(!a_buffer.check_byte_count(_s,_c,"TH2D")) return 0;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Sw = std::move(bins);

    data.m_bin_entries.resize(binn,0);
   {std::vector<double> empty;
    empty.resize(2,0);
    data.m_bin_Sxw.resize(binn,empty);
    data.m_bin_Sx2w.resize(binn,empty);}

    data.m_all_entries = static_cast<unsigned int>(fEntries);
    data.m_in_range_entries = 0;
    data.m_in_range_Sw = fSw;
    data.m_in_range_Sw2 = fSw2;
    data.m_in_range_Sxw.resize(2,0);
    data.m_in_range_Sx2w.resize(2,0);
    data.m_in_range_Sxw[0] = fSxw;
    data.m_in_range_Sx2w[0] = fSx2w;
    data.m_in_range_Sxw[1] = fSyw;
    data.m_in_range_Sx2w[1] = fSy2w;

    histo::h2d* h = new histo::h2d("",10,0,1,10,0,1);
    h->copy_from_data(data);
    return h;
}

inline histo::h3d* TH3D_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Now we have to reconstruct a valid Histogram from a_buffer :
    hd_data data;

    data.m_dimension = 3;
    data.m_axes.resize(3);
    data.m_in_range_plane_Sxyw.resize(3,0);

    double fEntries; //in range + outflow.
    double fSw;      //in range.
    double fSw2;     //in range.
    double fSxw;     //in range.
    double fSx2w;    //in range.
    double fSyw;     //in range.
    double fSy2w;    //in range.
    double fSzw;     //in range.
    double fSz2w;    //in range.
    if(!TH_read_3D(a_buffer,data,fEntries,fSw,fSw2,fSxw,fSx2w,fSyw,fSy2w,fSzw,fSz2w)) return 0;
    // the upper set :
    //data.m_title
    //data.m_bin_number
    //data.m_axes
    //data.m_bin_Sw2

    std::vector<double> bins; //fArray TArrayD
    if(!Array_stream<double>(a_buffer,bins)) return 0;
    if(!a_buffer.check_byte_count(_s,_c,"TH3D")) return 0;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Sw = std::move(bins);

    data.m_bin_entries.resize(binn,0);
   {std::vector<double> empty;
    empty.resize(3,0);
    data.m_bin_Sxw.resize(binn,empty);
    data.m_bin_Sx2w.resize(binn,empty);}

    data.m_all_entries = static_cast<unsigned int>(fEntries);
    data.m_in_range_entries = 0;
    data.m_in_range_Sw = fSw;
    data.m_in_range_Sw2 = fSw2;
    data.m_in_range_Sxw.resize(3,0);
    data.m_in_range_Sx2w.resize(3,0);
    data.m_in_range_Sxw[0] = fSxw;
    data.m_in_range_Sx2w[0] = fSx2w;
    data.m_in_range_Sxw[1] = fSyw;
    data.m_in_range_Sx2w[1] = fSy2w;
    data.m_in_range_Sxw[2] = fSzw;
    data.m_in_range_Sx2w[2] = fSz2w;

    histo::h3d* h = new histo::h3d("",10,0,1,10,0,1,10,0,1);
    h->copy_from_data(data);
    return h;
}

inline histo::p1d* TProfile_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Version 3 streaming (ROOT/v3-00-6).

    //WARNING : the mapping histo::p1d / TProfile is not obvious.
    //p1d::m_bin_Svw  <---> TProfile::fArray
    //p1d::m_bin_Sv2w <---> TProfile::fSumw2
    //p1d::m_bin_Sw   <---> TProfile::fBinEntries

    histo::h1d* h = TH1D_stream(a_buffer);
    if(!h) return 0;

    //NOTE : histo.m_bin_Sw <---> TH1D::TArrayD::fArray

    pd_data data(h->dac());
    delete h;

    std::vector<double> bins; //fBinEntries TArrayD
    if(!Array_stream<double>(a_buffer,bins)) return 0;
    int errorMode;
    if(!a_buffer.read(errorMode)) return 0;
    double ymin;
    if(!a_buffer.read(ymin)) return 0;
    double ymax;
    if(!a_buffer.read(ymax)) return 0;

    if(v>=4) {
      double  sumwy;
      if(!a_buffer.read(sumwy)) return 0;
      double   sumwy2;
      if(!a_buffer.read(sumwy2)) return 0;
    }
    if(v>=5) {
      std::vector<double> bins_sumw2; //fBinSumw2 TArrayD
      if(!Array_stream<double>(a_buffer,bins_sumw2)) return 0;
    }

    if(!a_buffer.check_byte_count(_s,_c,"TProfile")) return 0;

    data.m_is_profile = true;
    data.m_cut_v = true;
    data.m_min_v = ymin;
    data.m_max_v = ymax;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Svw.resize(binn);
    data.m_bin_Sv2w.resize(binn);

    for(unsigned int index=0;index<binn;index++){
      double svw = data.m_bin_Sw[index];
      double sv2w = data.m_bin_Sw2[index];
      double sw = bins[index];
    //data.m_bin_entries[index] = (int)sw; //FIXME : ok for w = 1 only !
      data.m_bin_Sw[index] = (double)sw;
      //FIXME : data.m_bin_Sxw
      //FIXME : data.m_bin_Sx2w
      data.m_bin_Svw[index] = svw;
      data.m_bin_Sv2w[index] = sv2w;
    }

    histo::p1d* p = new histo::p1d("",10,0,1);
    p->copy_from_data(data);
    // We have now a valid histo::p1d.
    return p;
}

inline histo::p2d* TProfile2D_stream(buffer& a_buffer){
    unsigned int _s,_c;
    short v;
    if(!a_buffer.read_version(v,_s,_c)) return 0;

    // Version 3 streaming (ROOT/v3-00-6).

    //WARNING : the mapping histo::p1d / TProfile is not obvious.
    //p1d::m_bin_Svw  <---> TProfile::fArray
    //p1d::m_bin_Sv2w <---> TProfile::fSumw2
    //p1d::m_bin_Sw   <---> TProfile::fBinEntries

    histo::h2d* h = TH2D_stream(a_buffer);
    if(!h) return 0;

    //NOTE : histo.m_bin_Sw <---> TH2D::TArrayD::fArray

    pd_data data(h->dac());
    delete h;

    std::vector<double> bins; //fBinEntries TArrayD
    if(!Array_stream<double>(a_buffer,bins)) return 0;
    int errorMode;
    if(!a_buffer.read(errorMode)) return 0;
    double zmin;
    if(!a_buffer.read(zmin)) return 0;
    double zmax;
    if(!a_buffer.read(zmax)) return 0;
    if(v>=5) {
      double  sumwz;
      if(!a_buffer.read(sumwz)) return 0;
      double   sumwz2;
      if(!a_buffer.read(sumwz2)) return 0;
    }
    if(v>=7) {
      std::vector<double> bins_sumw2; //fBinSumw2 TArrayD
      if(!Array_stream<double>(a_buffer,bins_sumw2)) return 0;
    }
    if(!a_buffer.check_byte_count(_s,_c,"TProfile2D")) return 0;

    data.m_is_profile = true;
    data.m_cut_v = true;
    data.m_min_v = zmin;
    data.m_max_v = zmax;

    unsigned int binn = data.m_bin_number;
    data.m_bin_Svw.resize(binn);
    data.m_bin_Sv2w.resize(binn);

    for(unsigned int index=0;index<binn;index++){
      double svw = data.m_bin_Sw[index];
      double sv2w = data.m_bin_Sw2[index];
      double sw = bins[index];
    //data.m_bin_entries[index] = (int)sw; //FIXME : ok for w = 1 only !
      data.m_bin_Sw[index] = (double)sw;
      //FIXME : data.m_bin_Sxw
      //FIXME : data.m_bin_Sx2w
      data.m_bin_Svw[index] = svw;
      data.m_bin_Sv2w[index] = sv2w;
    }

    histo::p2d* p = new histo::p2d("",10,0,1,10,0,1);
    p->copy_from_data(data);
    return p;
}

class TDirectory : public directory {
public:
  TDirectory(ifile& a_file):directory(a_file){}
  virtual ~TDirectory(){}
protected:
  TDirectory(const TDirectory& a_from):directory(a_from){}
  TDirectory& operator=(const TDirectory&){return *this;}
public:
  bool stream(buffer& a_buffer){
    initialize();
    short version;
    if(!a_buffer.read_version(version)) return false;
    unsigned int _date;
    if(!a_buffer.read(_date)) return false;
    //m_date_C.setDate(_date);
    if(!a_buffer.read(_date)) return false;
    //m_date_M.setDate(_date);
    if(!a_buffer.read(m_nbytes_keys)) return false;
    if(!a_buffer.read(m_nbytes_name)) return false;
    if((uint32)version>big_file_version_tag()) {
      if(!a_buffer.read(m_seek_directory)) return false;
      if(!a_buffer.read(m_seek_parent)) return false;
      if(!a_buffer.read(m_seek_keys)) return false;
    } else {
     {seek32 i;
      if(!a_buffer.read(i)) return false;
      m_seek_directory = i;}

     {seek32 i;
      if(!a_buffer.read(i)) return false;
      m_seek_parent = i;}

     {seek32 i;
      if(!a_buffer.read(i)) return false;
      m_seek_keys = i;}
    }

    if (m_seek_keys) {
      uint32 n;
      if(!read_keys(n)) {
        a_buffer.out() << "tools::rroot::TDirectory::stream :"
                       << " cannot read keys."
                       << std::endl;
        return false;
      }
    }

    return true;
  }
protected:
  void initialize(){
    // Initialise directory to defaults :
    // If directory is created via default ctor (when dir is read from file)
    // don't add it here to the directory since its name is not yet known.
    // It will be added to the directory in TKey::ReadObj().
    m_date_C = 0;//m_date_C.set();
    m_date_M = 0;//m_date_M.set();
    m_nbytes_keys = 0;
    m_seek_directory = 0;
    m_seek_parent = 0;
    m_seek_keys = 0;
  }
};


inline void dump(std::ostream& a_out,
                 ifile& a_file,
                 const std::vector<key*>& a_keys,
                 bool a_recursive,
                 unsigned int a_spaces = 0) {

  // dump non directory objects :
 {std::vector<key*>::const_iterator it;
  for(it=a_keys.begin();it!=a_keys.end();++it) {
    key& k = *(*it);
    if(k.object_class()==TDirectory_cls()) continue;
   {for(unsigned int index=0;index<a_spaces;index++) a_out << " ";}
    k.dump(a_out);
  }}

  // dump directories :
 {std::vector<key*>::const_iterator it;
  for(it=a_keys.begin();it!=a_keys.end();++it) {
    key& k = *(*it);
    if(k.object_class()!=TDirectory_cls()) continue;

    std::string label = k.object_name();
   {for(unsigned int index=0;index<a_spaces;index++) a_out << " ";}
    a_out << "directory : " << label << std::endl;

    if(!a_recursive) continue;

    uint32 sz;
    char* buf = k.get_object_buffer(a_file,sz);
    //we don't have ownership of buf.
    if(!buf) {
      a_out  << "tools::rroot::dump :"
             << " can't get directory data buffer."
             << std::endl;
    } else {
      buffer b(a_out,a_file.byte_swap(),sz,buf,k.key_length(),false);
      TDirectory tdir(a_file);
      if(!tdir.stream(b)) {
        a_out  << "tools::rroot::dump :"
              << " can't stream TDirectory."
              << std::endl;
      } else {
        const std::vector<key*>& keys = tdir.keys();
        dump(a_out,a_file,keys,a_recursive,a_spaces+1);
      }
    }
  }}
}

}}

#endif