CSCSP_MBblock.h

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#ifndef CSCSP_MBblock_h
#define CSCSP_MBblock_h

#include <cstring>

class CSCSP_MBblock {
private:
  unsigned quality_ : 3;   // muon quality (0-7),  quality > 0 for valid data;
  unsigned zero_1 : 1;     // format specific
  unsigned phi_bend_ : 5;  // phi bend angle
  unsigned zero_2 : 3;     // format specific
  unsigned flag_ : 1;      // if 1 then it is a second muon from previous bunch crossing
  unsigned cal_ : 1;       // MBy special mode flag
  unsigned zero_3 : 2;     // format specific
  unsigned phi_ : 12;   // azimuth coordinate;
  unsigned bxn1_ : 1;   // next to the least significant bit of the MB BX number
  unsigned bxn0_ : 1;   // least significant bit of the MB BX number
  unsigned bc0_ : 1;    // BX zero timing mark
  unsigned zero_4 : 1;  // format specific
  unsigned mb_bxn_ : 12;  // Stub arrival time picked from a local 12-bit Bunch Counter, that runs at data stream timing
  unsigned spare_1 : 3;   // not used
  unsigned zero_5 : 1;    // format specific
  unsigned spare_2 : 15;  // not used
  unsigned zero_6 : 1;    // format specific

  // Other data members logically belong to MB block record,
  //  but physically are located in Data Block Header, which implementation is:
  friend class CSCSPRecord;
  friend class CSCTFPacker;
  // Let this class set following data memebers:
  unsigned int tbin_;           // time bin, that this MB block belongs to in global SP record
  unsigned int valid_quality;   // valid quality
  unsigned int alignment_fifo;  // AF error
  unsigned int bxBit;           // monitors the MB(DT) timing
  unsigned int id_;             // stub id (1-MB1a, 2-MB1d)

public:
  bool check(void) const throw() {
    return zero_1 != 0 || zero_2 != 0 || zero_3 != 0 || zero_4 != 0 || zero_5 != 0 || zero_6 != 0 || spare_1 != 0 ||
           spare_2 != 0;
  }

  unsigned int quality(void) const throw() { return quality_; }
  unsigned int phi_bend(void) const throw() { return phi_bend_; }
  unsigned int flag(void) const throw() { return flag_; }
  unsigned int cal(void) const throw() { return cal_; }

  unsigned int phi(void) const throw() { return phi_; }
  unsigned int bxn(void) const throw() { return (bxn1_ << 1) | bxn0_; }
  unsigned int bc0(void) const throw() { return bc0_; }
  unsigned int BXN(void) const throw() { return mb_bxn_; }

  unsigned int id(void) const throw() { return id_; }
  unsigned int tbin(void) const throw() { return tbin_; }
  unsigned int vq(void) const throw() { return valid_quality; }
  unsigned int af(void) const throw() { return alignment_fifo; }
  unsigned int timingError(void) const throw() { return bxBit; }

  bool unpack(const unsigned short *&buf) throw() {
    std::memcpy(this, buf, 4 * sizeof(short));
    buf += 4;
    return check();
  }

  CSCSP_MBblock(void) {}
};

#endif