time_zone_offset.hpp

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// SPDX-License-Identifier: MIT
#pragma once
#ifndef TIME_SHIELD_HEADER_TIME_SHIELD_TIME_ZONE_OFFSET_HPP_INCLUDED
#define TIME_SHIELD_HEADER_TIME_SHIELD_TIME_ZONE_OFFSET_HPP_INCLUDED

 
#include "config.hpp"
#include "types.hpp"
#include "time_conversions.hpp"
#include "time_zone_struct.hpp"
 
namespace time_shield {


    TIME_SHIELD_CONSTEXPR inline ts_t to_utc(ts_t local, tz_t utc_offset) noexcept {
        return local == ERROR_TIMESTAMP ? ERROR_TIMESTAMP
                                        : local - static_cast<ts_t>(utc_offset);
    }

    TIME_SHIELD_CONSTEXPR inline ts_t to_local(ts_t utc, tz_t utc_offset) noexcept {
        return utc == ERROR_TIMESTAMP ? ERROR_TIMESTAMP
                                      : utc + static_cast<ts_t>(utc_offset);
    }

    TIME_SHIELD_CONSTEXPR inline ts_ms_t to_utc_ms(ts_ms_t local_ms, tz_t utc_offset) noexcept {
        return local_ms == ERROR_TIMESTAMP ? ERROR_TIMESTAMP
                                           : local_ms - sec_to_ms<ts_ms_t, tz_t>(utc_offset);
    }

    TIME_SHIELD_CONSTEXPR inline ts_ms_t to_local_ms(ts_ms_t utc_ms, tz_t utc_offset) noexcept {
        return utc_ms == ERROR_TIMESTAMP ? ERROR_TIMESTAMP
                                         : utc_ms + sec_to_ms<ts_ms_t, tz_t>(utc_offset);
    }

    TIME_SHIELD_CONSTEXPR inline tz_t utc_offset_of(const TimeZoneStruct& tz) noexcept {
        return time_zone_struct_to_offset(tz);
    }

 
} // namespace time_shield
 
#endif // TIME_SHIELD_HEADER_TIME_SHIELD_TIME_ZONE_OFFSET_HPP_INCLUDED