WordDecoder.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRIGT1CALOBYTESTREAM_WORDDECODER_H
#define TRIGT1CALOBYTESTREAM_WORDDECODER_H
 
#include <string>
#include <vector>
#include <cstdint>
 
namespace LVL1BS {
 
class BitField {
private:
  std::string m_name;
  uint32_t m_mask;
  uint8_t m_shift;
public:
  BitField(const std::string& name, uint8_t begin, uint8_t size);
 
  template<typename T> T get(const uint32_t& word) const {
    return T((word >> m_shift) & m_mask);
  }
 
  template<typename T> static T get(const uint32_t& word, uint8_t offset, uint8_t size){
    return T((word >> offset) & ((1 << size) - 1));
  }
 
  static uint32_t mask(uint32_t word, uint8_t offset, uint32_t mask) {
    return (word >> offset) & mask;
  }
 
};
 
 
class WordDecoder {
private:
  std::vector<BitField> m_bitFields;
public:
  WordDecoder(const std::vector<BitField>& bitFields):m_bitFields(bitFields){};
  template<typename T> T get(const uint32_t& word, uint8_t index) const{
    return m_bitFields[index].get<T>(word);
  }
};
 
}
 
#endif