RawDecodingError.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_PHOS_RAWDECODINGERROR_H
#define ALICEO2_PHOS_RAWDECODINGERROR_H
 
#include <exception>
 
namespace o2
{
 
namespace phos
{
 
class RawDecodingError : public std::exception
{
 public:
  enum class ErrorType_t {
    PAGE_NOTFOUND,    
    HEADER_DECODING,  
    PAYLOAD_DECODING, 
    HEADER_INVALID,   
    PAYLOAD_INVALID,  
  };
 
  RawDecodingError(ErrorType_t errtype) : mErrorType(errtype)
  {
  }
 
  ~RawDecodingError() noexcept override = default;
 
  const char* what() const noexcept override
  {
    switch (mErrorType) {
      case ErrorType_t::PAGE_NOTFOUND:
        return "Page with requested index not found";
      case ErrorType_t::HEADER_DECODING:
        return "RDH of page cannot be decoded";
      case ErrorType_t::PAYLOAD_DECODING:
        return "Payload of page cannot be decoded";
      case ErrorType_t::HEADER_INVALID:
        return "Access to header not belonging to requested superpage";
      case ErrorType_t::PAYLOAD_INVALID:
        return "Access to payload not belonging to requested superpage";
    };
    return "Undefined error";
  }
 
  ErrorType_t getErrorType() const { return mErrorType; }
 
 private:
  ErrorType_t mErrorType; 
};
 
} // namespace phos
 
} // namespace o2
 
#endif