label_type.hpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#ifndef LABEL_TYPE_HPP
#define LABEL_TYPE_HPP

struct BaseLabel : std::array<uint8_t, 4> {
  constexpr inline bool Empty() const
  {
    return std::ranges::all_of(*this, [](uint8_t b) { return b == 0; });
  };

  std::string AsString() const;
};

template <typename Tag>
struct Label : BaseLabel {
  constexpr Label()
  {
    std::ranges::fill(*this, 0);
  }

  constexpr Label(const char (&label)[5])
  {
    std::copy(label, label + this->size(), this->begin());
  }

  constexpr Label(const uint8_t (&label)[4])
  {
    std::copy(label, label + this->size(), this->begin());
  }

  constexpr std::strong_ordering operator<=>(const Label<Tag> &other) const = default;
};
 
#endif /* LABEL_TYPE_HPP */