/* vim:set ts=2 sw=2 sts=2 et: */
/**
 * \author     Marcus Holland-Moritz (github@mhxnet.de)
 * \copyright  Copyright (c) Marcus Holland-Moritz
 *
 * This file is part of dwarfs.
 *
 * dwarfs 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * dwarfs 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 dwarfs.  If not, see <https://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

#pragma once

#include <array>
#include <cstdint>
#include <memory>
#include <span>
#include <type_traits>

#include <dwarfs/compiler.h>

namespace dwarfs::writer::internal {

class nilsimsa {
 public:
  using hash_type = std::array<uint64_t, 4>;

  nilsimsa();
  ~nilsimsa();

  void update(uint8_t const* data, size_t size);
  void finalize(hash_type& hash) const;

  void operator()(std::span<uint8_t const> data) {
    update(data.data(), data.size());
  }

 private:
  class impl;

  std::unique_ptr<impl> impl_;
};

} // namespace dwarfs::writer::internal
