/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/DataFormats/MuonDetId/src/CSCTriggerNumbering.cc

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#include <DataFormats/MuonDetId/interface/CSCTriggerNumbering.h>
#include <DataFormats/MuonDetId/interface/CSCDetId.h>
#include <FWCore/Utilities/interface/Exception.h>

int CSCTriggerNumbering::ringFromTriggerLabels(int station, int triggerCSCID)
{
  if(station      < CSCDetId::minStationId() || station      > CSCDetId::maxStationId() ||
     triggerCSCID < MIN_CSCID                || triggerCSCID > MAX_CSCID)
    throw cms::Exception("CSCTriggerNumbering::InvalidInput") << "CSCTriggerNumbering::ringFromTriggerLabels():"
                                                              << " Station: " << station
                                                              << " TriggerCSCID: " << triggerCSCID
                                                              << " is not a valid set of labels."
                                                              << " Cannot Convert!!";

  int ring = 0;

  if(station == 1)
    if(triggerCSCID <= 3)
      ring = 1; 
    else if(triggerCSCID <= 6)
      ring = 2;
    else
      ring = 3;
  else
    if(triggerCSCID <= 3)
      ring = 1;
    else 
      ring = 2;
  
  return ring;  
}

int CSCTriggerNumbering::chamberFromTriggerLabels(int TriggerSector, int TriggerSubSector, int station, int TriggerCSCID)
{
  if(TriggerSector    < MIN_TRIGSECTOR           || TriggerSector    > MAX_TRIGSECTOR           ||
     TriggerSubSector < MIN_TRIGSUBSECTOR        || TriggerSubSector > MAX_TRIGSUBSECTOR        ||
     station          < CSCDetId::minStationId() || station          > CSCDetId::maxStationId() ||
     TriggerCSCID     < MIN_CSCID                || TriggerCSCID     > MAX_CSCID)
    throw cms::Exception("CSCTriggerNumbering::InvalidInput") << "CSCTriggerNumbering::chamberFromTriggerLabels():"
                                                              << " Trigger Sector: " << TriggerSector 
                                                              << " Trigger SubSector: " << TriggerSubSector
                                                              << " Station: " << station
                                                              << " TriggerCSCID: " << TriggerCSCID
                                                              << " is not a valid set of labels."
                                                              << " Cannot Convert!!";
    

  int chamber = 0;
  int realsubsector = (TriggerSubSector + 2*(TriggerSector - 1))%12 + 1; // station 1 only

  if(station != 1)
    if(TriggerCSCID <= 3)
      chamber = (TriggerCSCID + 3*(TriggerSector - 1))%18 + 1; // Derived from CMS Note: CMS IN 2000/04 ver 2.1 Oct/2005
                                                               // As far as I know this is reality.
    else
      chamber = (TriggerCSCID + 6*(TriggerSector - 1) - 2)%36 + 1;
  else
    if(TriggerCSCID <= 3)
      chamber = (TriggerCSCID + 3*(realsubsector - 1)+34)%36 + 1;
    else if(TriggerCSCID <= 6)
      chamber = (TriggerCSCID + 3*(realsubsector - 1)+31)%36 + 1;
    else
      chamber = (TriggerCSCID + 3*(realsubsector - 1)+28)%36 + 1;

  return chamber;
}

int CSCTriggerNumbering::sectorFromTriggerLabels(int TriggerSector, int TriggerSubSector, int station)
{
  if(TriggerSector    < MIN_TRIGSECTOR           || TriggerSector    > MAX_TRIGSECTOR           ||
     TriggerSubSector < MIN_TRIGSUBSECTOR        || TriggerSubSector > MAX_TRIGSUBSECTOR        ||
     station          < CSCDetId::minStationId() || station          > CSCDetId::maxStationId())
    throw cms::Exception("CSCTriggerNumbering::InvalidInput") << "CSCTriggerNumbering::sectorFromTriggerLabels():"
                                                              << " Trigger Sector: " << TriggerSector 
                                                              << " Trigger SubSector: " << TriggerSubSector
                                                              << " Station: " << station
                                                              << " is not a valid set of labels."
                                                              << " Cannot Convert!!";

  return ((station == 1) ? ((TriggerSubSector + 2*(TriggerSector - 1))%12 + 1) : TriggerSector);
}

int CSCTriggerNumbering::triggerSectorFromLabels(int station, int ring, int chamber)
{
  if(station < CSCDetId::minStationId() || station > CSCDetId::maxStationId() ||
     ring    < CSCDetId::minRingId()    || ring    > CSCDetId::maxRingId()    ||
     chamber < CSCDetId::minChamberId() || chamber > CSCDetId::maxChamberId())
    throw cms::Exception("CSCTriggerNumbering::InvalidInput") << "CSCTriggerNumbering::triggerSectorFromLabels():"
                                                              << " Station: " << station
                                                              << " Ring: " << ring
                                                              << " Chamber: " << chamber
                                                              << " is not a valid set of labels."
                                                              << " Cannot Convert!!";


  int result;
  // This version 16-Nov-99 ptc to match simplified chamber labelling for cms116
  //@@ REQUIRES UPDATE TO 2005 REALITY, ONCE I UNDERSTAND WHAT THAT IS
  // UPDATED - LGRAY Feb 2006
  
  if(station > 1 && ring > 1 ) {
    result = ((static_cast<unsigned>(chamber-3) & 0x7f) / 6) + 1; // ch 3-8->1, 9-14->2, ... 1,2 -> 6
  }
  else {
    result =  (station != 1) ? ((static_cast<unsigned>(chamber-2) & 0x1f) / 3) + 1 : // ch 2-4-> 1, 5-7->2, ...
              ((static_cast<unsigned>(chamber-3) & 0x7f) / 6) + 1;
  }

  return (result <= 6) ? result : 6; // Max sector is 6, some calculations give a value greater than six but this is expected
                                     // and delt with.
}

int CSCTriggerNumbering::triggerSectorFromLabels(CSCDetId id)
{
  return triggerSectorFromLabels(id.station(),id.ring(),id.chamber());
}

int CSCTriggerNumbering::triggerSubSectorFromLabels(int station, int chamber)
{
  if(station < CSCDetId::minStationId() || station > CSCDetId::maxStationId() ||
     chamber < CSCDetId::minChamberId() || chamber > CSCDetId::maxChamberId())
    throw cms::Exception("CSCTriggerNumbering::InvalidInput") << "CSCTriggerNumbering::triggerSectorFromLabels():"
                                                              << " Station: " << station
                                                              << " Chamber: " << chamber
                                                              << " is not a valid set of labels."
                                                              << " Cannot Convert!!";

  if(station != 1) return 0; // only station one has subsectors

  switch(chamber) // first make things easier to deal with
    {
    case 1:
      chamber = 36;
      break;
    case 2:
      chamber = 35;
      break;
    default:
      chamber -= 2;
    }

  chamber = ((chamber-1)%6) + 1; // renumber all chambers to 1-6

  return ((chamber-1) / 3) + 1; // [1,3] -> 1 , [4,6]->2
}

int CSCTriggerNumbering::triggerSubSectorFromLabels(CSCDetId id)
{
  return triggerSubSectorFromLabels(id.station(),id.chamber());
}

int CSCTriggerNumbering::triggerCscIdFromLabels(int station, int ring, int chamber) // updated to 2005
{
  if(station < CSCDetId::minStationId() || station > CSCDetId::maxStationId() ||
     ring    < CSCDetId::minRingId()    || ring    > CSCDetId::maxRingId()    ||
     chamber < CSCDetId::minChamberId() || chamber > CSCDetId::maxChamberId())
    throw cms::Exception("CSCTriggerNumbering::InvalidInput") << "CSCTriggerNumbering::triggerSectorFromLabels():"
                                                              << " Station: " << station
                                                              << " Ring: " << ring
                                                              << " Chamber: " << chamber
                                                              << " is not a valid set of labels."
                                                              << " Cannot Convert!!";

  int result;

  if( station == 1 ) {
    result = (chamber) % 3 + 1; // 1,2,3
    switch (ring) {
    case 1:
      break;
    case 2:
      result += 3; // 4,5,6
      break;
    case 3:
      result += 6; // 7,8,9
      break;
    }
  }
  else {
    if( ring == 1 ) {
      result = (chamber+1) % 3 + 1; // 1,2,3
    }
    else {
      result = (chamber+3) % 6 + 4; // 4,5,6,7,8,9
    }
  }
  return result;
}

int CSCTriggerNumbering::triggerCscIdFromLabels(CSCDetId id)
{
  return triggerCscIdFromLabels(id.station(),id.ring(),id.chamber());
}