strtag.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 STRTAG_H
#define STRTAG_H
 
#include <stdexcept>
#include <string>
 
template <class T = uint64_t>
constexpr T qStr2Tag(const char* str)
{
  if (strlen(str) != sizeof(T)) {
    throw std::runtime_error("Invalid tag length");
  }
  T tmp;
  for (uint32_t i = 0; i < sizeof(T); i++) {
    ((char*)&tmp)[i] = str[i];
  }
  return tmp;
}
 
template <class T>
std::string qTag2Str(const T tag)
{
  T str[2];
  str[0] = tag;
  str[1] = 0;
  return std::string((const char*)str);
}
 
#endif