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//
// $Id: G4PhysicsLnVector.cc,v 1.15 2006/06/29 19:04:15 gunter Exp $
// GEANT4 tag $Name:  $
//
// 
// --------------------------------------------------------------
//      GEANT 4 class implementation file
//
//  G4PhysicsLnVector.cc
//
//  History:
//    27 Apr. 1999, M.G. Pia: Created, copying from G4PhysicsLogVector
//    11 Nov. 2000, H.Kurashige : use STL vector for dataVector and binVector
//    9  Mar. 2001, H.Kurashige : add PhysicsVector type and Retrieve
//
// --------------------------------------------------------------

#include "G4PhysicsLnVector.hh"

G4PhysicsLnVector::G4PhysicsLnVector()
  : dBin(0.), baseBin(0.)
{
  type = T_G4PhysicsLnVector;
}

G4PhysicsLnVector::G4PhysicsLnVector(size_t theNbin)
  : dBin(0.), baseBin(0.)
{
  type = T_G4PhysicsLnVector;

  // Add extra one bin (hidden to user) to handle correctly when 
  // Energy=theEmax in getValue. 
  dataVector.reserve(theNbin+1);
  binVector.reserve(theNbin+1); 

  numberOfBin = theNbin;

  edgeMin = 0.;
  edgeMax = 0.;

  lastBin = INT_MAX;
  lastEnergy = -DBL_MAX;
  lastValue = DBL_MAX;

  for (size_t i=0; i<=numberOfBin; i++)
  {
     binVector.push_back(0.0);
     dataVector.push_back(0.0);
  }
}  

G4PhysicsLnVector::G4PhysicsLnVector(G4double theEmin, 
                                     G4double theEmax, size_t theNbin)
  : dBin(std::log(theEmax/theEmin)/theNbin),
    baseBin(std::log(theEmin)/dBin)
{
  type = T_G4PhysicsLnVector;

  // Add extra one bin (hidden to user) to handle correctly when 
  // Energy=theEmax in getValue. 
  dataVector.reserve(theNbin+1);
  binVector.reserve(theNbin+1); 

  numberOfBin = theNbin;

  for (size_t i=0; i<numberOfBin+1; i++)
  {
    binVector.push_back(std::exp(std::log(theEmin)+i*dBin));
    dataVector.push_back(0.0);
  }

  edgeMin = binVector[0];
  edgeMax = binVector[numberOfBin-1];

  lastBin = INT_MAX;
  lastEnergy = -DBL_MAX;
  lastValue = DBL_MAX;
}

G4PhysicsLnVector::~G4PhysicsLnVector(){}

G4bool G4PhysicsLnVector::Retrieve(std::ifstream& fIn, G4bool ascii)
{
  G4bool success = G4PhysicsVector::Retrieve(fIn, ascii);
  if (success)
  {
    G4double theEmin = binVector[0];
    dBin = std::log(binVector[1]/theEmin);
    baseBin = std::log(theEmin)/dBin;
  }
  return success;
}