chrono.hpp

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/*
 * Copyright 2023 Robert Bosch GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#pragma once
 
#include <chrono>
#include <string>
 
#include <nlohmann/json.hpp>
 
namespace fable {
 
std::chrono::nanoseconds parse_duration_to_nanoseconds(const std::string& s);
 
template <typename Duration>
Duration parse_duration(const std::string& s) {
  return std::chrono::duration_cast<Duration>(parse_duration_to_nanoseconds(s));
}
 
template <typename Duration>
std::string to_string(const Duration& d) {
  return to_string(std::chrono::duration_cast<std::chrono::nanoseconds>(d));
}
 
template <>
std::string to_string(const std::chrono::nanoseconds& d);
 
}  // namespace fable
 
namespace nlohmann {
 
template <typename Rep, typename Period>
struct adl_serializer<std::chrono::duration<Rep, Period>> {
  using Duration = std::chrono::duration<Rep, Period>;
 
  static void to_json(json& j, const Duration& d) {
    j = ::fable::to_string(d);
  }
 
  static void from_json(const json& j, Duration& d) {
    std::string s = j.get<std::string>();
    d = ::fable::parse_duration<Duration>(s);
  }
};
 
}  // namespace nlohmann