/data/refman/pasoursint/CMSSW_5_3_8_patch3/src/SimDataFormats/CaloTest/src/HcalTestNumbering.cc

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// File: HcalTestNumbering.cc
// Description: Numbering scheme packing for test beam hadron calorimeter
#include "SimDataFormats/CaloTest/interface/HcalTestNumbering.h"

uint32_t HcalTestNumbering::packHcalIndex(int det, int z, int depth,
                                          int eta, int phi, int lay) {

  uint32_t idx=(det&15)<<28;      //bits 28-31 
  idx+=((depth-1)&3)<<26;         //bits 26-27  
  idx+=((lay-1)&31)<<21;          //bits 21-25
  idx+=(z&1)<<20;                 //bits 20
  idx+=(eta&1023)<<10;            //bits 10-19
  idx+=(phi&1023);                //bits  0-9

  return idx;

}

void HcalTestNumbering::unpackHcalIndex(const uint32_t & idx, int& det, int& z,
                                        int& depth, int& eta, int& phi,
                                        int& lay) {
  det  = (idx>>28)&15;
  depth= (idx>>26)&3;  depth+=1;
  lay  = (idx>>21)&31; lay+=1;
  z    = (idx>>20)&1;
  eta  = (idx>>10)&1023;
  phi  = (idx&1023);
}