DigitFileFormat.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#ifndef O2_MCH_DEVIO_DIGITS_DIGIT_FILE_FORMAT_H
#define O2_MCH_DEVIO_DIGITS_DIGIT_FILE_FORMAT_H
 
#include <cstdint>
#include <iosfwd>
#include <array>
 
namespace o2::mch::io
{
 
constexpr uint64_t TAG_DIGITS = 0x3F2F; // = 016175 = 0.1.6.1.7.5 = D.I.G.I.T.S
 
struct DigitFileFormat {
  union {
    uint64_t format = TAG_DIGITS;
    struct {
      uint64_t tag : 16;
      uint64_t fileVersion : 8;
      uint64_t reserved : 4;
      uint64_t digitVersion : 8;
      uint64_t digitSize : 8;
      uint64_t rofVersion : 8;
      uint64_t rofSize : 8;
      uint64_t hasRof : 1;
      uint64_t run2ids : 1;
    };
  };
};
 
extern std::array<DigitFileFormat, 5> digitFileFormats;
 
std::ostream& operator<<(std::ostream&, const DigitFileFormat&);
 
bool operator==(const DigitFileFormat& dff1, const DigitFileFormat& dff2);
bool operator!=(const DigitFileFormat& dff1, const DigitFileFormat& dff2);
 
DigitFileFormat readDigitFileFormat(std::istream& in);
 
bool isValid(DigitFileFormat dff);
 
} // namespace o2::mch::io
#endif