MdtReadOut.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef MUONBYTESTREAM_MDTREADOUT_H
#define MUONBYTESTREAM_MDTREADOUT_H
 
#include <stdint.h>
 
#include <utility>
// Base class for Mdt readout decoding
// adapted to Mdt from RpcReadOut
 
class MdtReadOut {
public:
    MdtReadOut();
    ~MdtReadOut() = default;
 
protected:
    constexpr std::pair<uint32_t, uint16_t> getBitsWord(const uint16_t bstart, const uint16_t bstop) {
        uint32_t word = 0;
        for (uint16_t i = bstop; i < bstart; i++) word = ((word | 1) << 1);
        return std::make_pair(word, bstop);
    }
 
    // Decode a section of a 32-bits data word
    uint32_t getBits(std::pair<uint32_t, uint16_t> wordbstop) const {
        uint32_t result = (m_word >> wordbstop.second) & (wordbstop.first | 1);
        return result;
    }
 
    // Encode a 32-bits data word from fragments with size < 16 bits
    static uint32_t setBits(uint16_t nData, const uint16_t* inputData, const uint16_t* inputPos);
 
    // Encode a 32-bits data word from fragments with size < 32 bits
    static uint32_t setBits(uint16_t nData, const uint32_t* inputData, const uint16_t* inputPos);
 
    uint32_t m_word;
};
 
#endif