RawBuffer.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 ALICEO2_EMCAL_RAWBUFFER_H
#define ALICEO2_EMCAL_RAWBUFFER_H
 
#include <array>
#include <cstdint>
#include <iosfwd>
#include <gsl/span>
 
namespace o2
{
namespace emcal
{
 
class RawBuffer
{
 public:
  RawBuffer() = default;
  ~RawBuffer() = default;
 
  void reset() { mCurrentDataWord = 0; }
 
  void flush();
 
  void readFromStream(std::istream& in, uint32_t payloadsize);
 
  void readFromMemoryBuffer(const gsl::span<const char> rawmemory);
 
  int getNDataWords() const { return mNDataWords; }
 
  uint32_t getNextDataWord();
 
  uint32_t getWord(int index) const;
 
  const gsl::span<const uint32_t> getDataWords() const { return gsl::span<const uint32_t>(mDataWords.data(), mNDataWords); }
 
  bool hasNext() const { return mCurrentDataWord < mNDataWords; }
 
 private:
  std::array<uint32_t, 2048> mDataWords; 
  int mNDataWords = 0;                   
  int mCurrentDataWord = 0;              
};
 
} // namespace emcal
 
} // namespace o2
 
#endif