/******************************************************************************
 *                       ____    _    _____                                   *
 *                      / ___|  / \  |  ___|    C++                           *
 *                     | |     / _ \ | |_       Actor                         *
 *                     | |___ / ___ \|  _|      Framework                     *
 *                      \____/_/   \_|_|                                      *
 *                                                                            *
 * Copyright 2011-2018 Dominik Charousset                                     *
 *                                                                            *
 * Distributed under the terms and conditions of the BSD 3-Clause License or  *
 * (at your option) under the terms and conditions of the Boost Software      *
 * License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE.       *
 *                                                                            *
 * If you did not receive a copy of the license files, see                    *
 * http://opensource.org/licenses/BSD-3-Clause and                            *
 * http://www.boost.org/LICENSE_1_0.txt.                                      *
 ******************************************************************************/

#pragma once

#include <cstdint>
#include <limits>
#include <type_traits>

namespace caf::detail {

template <class To, bool LargeUnsigned = sizeof(To) >= sizeof(int64_t)
                                         && std::is_unsigned<To>::value>
struct bounds_checker {
  static constexpr bool check(int64_t x) noexcept {
    return x >= std::numeric_limits<To>::min()
           && x <= std::numeric_limits<To>::max();
  }
};

template <>
struct bounds_checker<int64_t, false> {
  static constexpr bool check(int64_t) noexcept {
    return true;
  }
};

template <class To>
struct bounds_checker<To, true> {
  static constexpr bool check(int64_t x) noexcept {
    return x >= 0;
  }
};

} // namespace caf::detail
