// ----------------------------------------------------------------------------
// $Id: LCDTkID.cxx,v 1.1 2001/05/10 17:25:08 toshi Exp $
// ----------------------------------------------------------------------------
//
// $Log: LCDTkID.cxx,v $
// Revision 1.1  2001/05/10 17:25:08  toshi
// Rename *.C to *.cxx.
//
// Revision 1.2  2001/04/28 23:45:37  toshi
// Start to use CVS.
//
//
// access and set functions for binary Tracker VXD tags
// Version 1.0 17 Dec 1998 Rob creation of TkID class
//
////////////////////////////////////////////////////////////////////////////
//                                                                        
// LCDTkID                                                                   
//                                                                        
// The TkID class contains a binary ID number and functions to obtain     
// the location of the hit in question.  The TkID class is used in the   
// Tracker_Hit and VXD_Hit classes.                                       
//                                                                        
////////////////////////////////////////////////////////////////////////////
#include "LCDTkID.h"

ClassImp(LCDTkID)

//____________________________________________________________
 void LCDTkID::SetLayer(UInt_t tag) {
  // SetLayer sets the first 8 bits of m_tag to the layer number
  //Int_t layerShift = tag & LCDTkID::layerOn;
  UInt_t layerShift = tag;
  UInt_t  layer = (LCDTkID::layerOff & m_tag) | layerShift;
  m_tag = layer;
}
//____________________________________________________________

//____________________________________________________________
 UInt_t LCDTkID::GetNorthSouth() const {
  // north/south in bit 30. northSouth extracts that, returns
  // it shifted down to least-significant end.
    return (LCDTkID::northSouthOn & m_tag) >> 30;
}
//____________________________________________________________

//____________________________________________________________
 void LCDTkID::SetNorthSouth(UInt_t tag) {
  // SetNorthSouth sets tag N/S bit (bit 30) to requested value.
  UInt_t northSouthShift = (tag << 30) & LCDTkID::northSouthOn;
  UInt_t  northSouth = (LCDTkID::northSouthOff & m_tag) | northSouthShift;
  m_tag = northSouth;
}
//____________________________________________________________

//____________________________________________________________
 UInt_t LCDTkID::GetBarrelEndcap() const {
  // barrelEndcap in bit 31. BarrelEndcap extracts that bit 
  // and shifts to least-significant end.
  return (LCDTkID::barrelEndcapOn & m_tag) >> 31;
}
//____________________________________________________________

//____________________________________________________________
 void LCDTkID::SetBarrelEndcap(UInt_t tag) {
  // SetBarrelEndcap sets  barrelEndcap bit (bit 31) to requested
  // value
  UInt_t barrelEndcapShift = (tag << 31) & LCDTkID::barrelEndcapOn;
  UInt_t  barrelEndcap = (LCDTkID::barrelEndcapOff & m_tag) 
    | barrelEndcapShift;

  m_tag = barrelEndcap;
}
//____________________________________________________________

//____________________________________________________________
 void LCDTkID::SetSystem(UInt_t tag) {
  // SetSystem sets tag system bits in appropriate place (bits 28-29)
  UInt_t systemShift = (tag << 28) & LCDTkID::systemOn;

  UInt_t  system = (LCDTkID::systemOff & m_tag) 
    | systemShift;
  
  m_tag = system;
}
///____________________________________________________________


const Int_t  LCDTkID::systemOn =	       	0x30000000;
const Int_t  LCDTkID::systemOff =	        ~LCDTkID::systemOn;

const Int_t  LCDTkID::barrelEndcapOn =		0x80000000;
const Int_t  LCDTkID::barrelEndcapOff =	        ~LCDTkID::barrelEndcapOn;

const Int_t  LCDTkID::northSouthOn =		0x40000000;
const Int_t  LCDTkID::northSouthOff =		~LCDTkID::northSouthOn;

const Int_t  LCDTkID::layerOn =			0x000000FF;
const Int_t  LCDTkID::layerOff =	       	~LCDTkID::layerOn;