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// $Id: G4Ranecu.cc,v 1.3 2008/06/25 17:20:04 kaitanie Exp $
// Translation of INCL4.2/ABLA V3 
// Pekka Kaitaniemi, HIP (translation)
// Christelle Schmidt, IPNL (fission code)
// Alain Boudard, CEA (contact person INCL/ABLA)
// Aatos Heikkinen, HIP (project coordination)

#include "G4Ranecu.hh"

G4Ranecu::G4Ranecu()
{
  iseed1 = 666;
  iseed2 = 777;
}

G4Ranecu::~G4Ranecu()
{

}

G4double G4Ranecu::getRandom()
{
  // This is an adapted version of subroutine ranecu:
  // A. Padal, J. Sempau Computer Physics Cummunications 175 (2006) 440-450

  //    implicit double precision (a-h,o-z), integer*4 (i-n)
  //    common/rseed/iseed1,iseed2
  G4double uscale=1.0/2.147483563e9;

  G4long i1=iseed1/53668;
  iseed1=40014*(iseed1-i1*53668)-i1*12211;

  if(iseed1 < 0) iseed1 = iseed1 + 2147483563;

  G4long i2=iseed2/52774;
  iseed2=40692*(iseed2-i2*52774)-i2*3791;
  if(iseed2 < 0) iseed2=iseed2+2147483399;

  G4long iz=iseed1-iseed2;
  if(iz < 1) iz=iz+2147483562;
  
  return iz*uscale;
}