ignite_date.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
 
#pragma once
 
#include <cstdint>
 
namespace ignite {

class ignite_date {
public:
    constexpr ignite_date() noexcept = default;

    constexpr ignite_date(std::int32_t year, std::int32_t month, std::int32_t day_of_month)
        : m_year(year)
        , m_month(std::int8_t(month))
        , m_day(std::int8_t(day_of_month)) {
        // TODO: check that arguments are in valid ranges.
    }

    [[nodiscard]] constexpr std::int32_t get_year() const noexcept { return m_year; }

    [[nodiscard]] constexpr std::int_fast8_t get_month() const noexcept { return m_month; }

    [[nodiscard]] constexpr std::int_fast8_t get_day_of_month() const noexcept { return m_day; }

    [[nodiscard]] constexpr int compare(const ignite_date &other) const noexcept {
        if (m_year != other.m_year) {
            return m_year - other.m_year;
        }
        if (m_month != other.m_month) {
            return m_month - other.m_month;
        }
        return m_day - other.m_day;
    }
 
private:
    std::int_least32_t m_year = 0;
    std::int_least8_t m_month = 1;
    std::int_least8_t m_day = 1;
};

constexpr bool operator==(const ignite_date &lhs, const ignite_date &rhs) noexcept {
    return lhs.compare(rhs) == 0;
}

constexpr bool operator!=(const ignite_date &lhs, const ignite_date &rhs) noexcept {
    return lhs.compare(rhs) != 0;
}

constexpr bool operator<(const ignite_date &lhs, const ignite_date &rhs) noexcept {
    return lhs.compare(rhs) < 0;
}

constexpr bool operator<=(const ignite_date &lhs, const ignite_date &rhs) noexcept {
    return lhs.compare(rhs) <= 0;
}

constexpr bool operator>(const ignite_date &lhs, const ignite_date &rhs) noexcept {
    return lhs.compare(rhs) > 0;
}

constexpr bool operator>=(const ignite_date &lhs, const ignite_date &rhs) noexcept {
    return lhs.compare(rhs) >= 0;
}
 
} // namespace ignite