FEDTrailer.cc

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#include "EventFilter/FEDInterface/interface/FEDTrailer.h"

#define FED_MORE_TRAILERS  0x00000008
#define FED_TCTRLID        0xA0000000


FEDTrailer::FEDTrailer(const unsigned char* trailer) :
  theTrailer(reinterpret_cast<const fedt_t*>(trailer)) {}


FEDTrailer::~FEDTrailer(){}



int FEDTrailer::lenght(){
  return (theTrailer->eventsize & FED_EVSZ_MASK) >> FED_EVSZ_SHIFT;
}


int FEDTrailer::crc(){
  return ((theTrailer->conscheck & FED_CRCS_MASK) >> FED_CRCS_SHIFT);
}


int FEDTrailer::evtStatus(){
  return ((theTrailer->conscheck & FED_STAT_MASK) >> FED_STAT_SHIFT);
}


int FEDTrailer::ttsBits(){
  return ((theTrailer->conscheck & FED_TTSI_MASK) >> FED_TTSI_SHIFT);  
}

 
bool FEDTrailer::moreTrailers(){
  return ((theTrailer->conscheck & FED_MORE_TRAILERS)!=0);
}


void FEDTrailer::set(unsigned char* trailer,
             int evt_lgth,
             int crc,  
             int evt_stat,
             int tts,
             bool T){
  // FIXME: should check that input ranges are OK!!!
  fedt_t* t = reinterpret_cast<fedt_t*>(trailer);

  t->eventsize = 
    FED_TCTRLID |
    evt_lgth << FED_EVSZ_SHIFT;
 
  t->conscheck = 
    crc       << FED_CRCS_SHIFT |
    evt_stat  << FED_STAT_SHIFT |
    tts       << FED_TTSI_SHIFT;
  
  if (T) t->conscheck |= FED_MORE_TRAILERS;
}


bool FEDTrailer::check(){
  // ...may report with finer detail
  bool result = true;
  result &= ((theTrailer->eventsize & FED_TCTRLID_MASK) == FED_TCTRLID);

  return result;
}