CSCSPTrailer.h

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#ifndef CSCSPTrailer_h
#define CSCSPTrailer_h

#include <cstring>

class CSCSPTrailer {
private:
    unsigned l1a_           : 8;
    unsigned word_count_low : 4;
    unsigned trailer_mark_1 : 4;  // constant, should be 1111 = 0xF
    unsigned trailer_mark_2 : 4;  // constant, should be 1111 = 0xF
    unsigned trailer_mark_3 : 3;  // constant, should be  111 = 0x7
    unsigned l1a_fifo_full_ : 1;
    unsigned word_count_high: 4;
    unsigned trailer_mark_4 : 4;  // constant, should be 1111 = 0xF
    unsigned month_            : 4;
    unsigned year_             : 4;
    unsigned bb_               : 1; // SP readout configuration year base (0 / 16)
    unsigned spare_1           : 1;
    unsigned spare_2           : 1;
    unsigned zero_1            : 1;
    unsigned trailer_mark_5    : 4;  // constant, should be 1111 = 0xF
    unsigned core_configuraton : 12;
    unsigned trailer_mark_6    : 4;  // constant, should be 1111 = 0xF
    unsigned day_              : 5;
    unsigned zero_2            : 7;
    unsigned trailer_mark_7    : 4;  // constant, should be 1110 = 0xE
    unsigned board_id_         : 12;
    unsigned trailer_mark_8    : 4;  // constant, should be 1110 = 0xE
    unsigned crc_low           : 11;
    unsigned crc_low_parity    : 1;
    unsigned trailer_mark_9    : 4;  // constant, should be 1110 = 0xE
    unsigned crc_high          : 11;
    unsigned crc_high_parity   : 1;
    unsigned trailer_mark_10   : 4;  // constant, should be 1110 = 0xE

    friend class CSCTFPacker;

public:
    bool check(void) const throw() {
        return spare_1!=0 || spare_2!=0 || zero_1!=0 || zero_2!=0 ||
            trailer_mark_1!=0xF || trailer_mark_2!=0xF || trailer_mark_3!=0x7 || trailer_mark_4!=0xF || trailer_mark_5!=0xF || trailer_mark_6!=0xF ||
            trailer_mark_7!=0xE || trailer_mark_8!=0xE || trailer_mark_9!=0xE || trailer_mark_10!=0xE;
    }

    unsigned int l1a_7bits     (void) const throw() { return l1a_; }
    unsigned int l1a_queue_size(void) const throw() { return (word_count_high<<4)|word_count_low; }
    bool         l1a_fifo_full (void) const throw() { return l1a_fifo_full_; }

    unsigned int year          (void) const throw() { return 2000+16*bb_+year_; }
    unsigned int month         (void) const throw() { return month_; }
    unsigned int day           (void) const throw() { return day_;   }
    unsigned int configuration (void) const throw() { return core_configuraton;  }

    //unsigned int slot    (void) const throw() { return  board_id_&0x1F;       }
    //unsigned int sector  (void) const throw() { return (board_id_&0x700)>>8;  }
    //unsigned int endcap  (void) const throw() { return (board_id_&0x800)>>11; }

    unsigned int board_id(void) const throw() { return  board_id_;             }

    unsigned int crc     (void) const throw() { return crc_low|(crc_high<<11); }

    bool unpack(const unsigned short *&buf) throw()  { std::memcpy(this, buf, 8*sizeof(short)); buf+=8; return check(); }

    CSCSPTrailer(void){}
};

#endif