ts_t	time_shield::zone_to_gmt (ts_t local, TimeZone zone)
	Convert supported local civil time to GMT (UTC).
ts_t	time_shield::gmt_to_zone (ts_t gmt, TimeZone zone)
	Convert GMT (UTC) to a supported local civil time zone.
ts_t	time_shield::cet_to_gmt (ts_t cet)
	Convert Central European Time to Greenwich Mean Time.
ts_t	time_shield::eet_to_gmt (ts_t eet)
	Convert Eastern European Time to Greenwich Mean Time.
bool	time_shield::is_us_eastern_dst_local (const DateTimeStruct &dt)
	Check if local US Eastern time uses DST.
ts_t	time_shield::et_to_gmt (ts_t et)
	Convert US Eastern Time (New York, EST/EDT) to GMT (UTC).
ts_t	time_shield::gmt_to_et (ts_t gmt)
	Convert GMT (UTC) to US Eastern Time (New York, EST/EDT).
ts_t	time_shield::ny_to_gmt (ts_t ny)
	Convert New York Time to GMT (UTC).
ts_t	time_shield::gmt_to_ny (ts_t gmt)
	Convert GMT (UTC) to New York Time.
ts_t	time_shield::ct_to_gmt (ts_t ct)
	Convert US Central Time (America/Chicago, CST/CDT) to GMT (UTC).
ts_t	time_shield::gmt_to_ct (ts_t gmt)
	Convert GMT (UTC) to US Central Time (America/Chicago, CST/CDT).
ts_t	time_shield::gmt_to_cet (ts_t gmt)
	Convert Greenwich Mean Time to Central European Time.
ts_t	time_shield::gmt_to_eet (ts_t gmt)
	Convert Greenwich Mean Time to Eastern European Time.
ts_t	time_shield::convert_time_zone (ts_t local, TimeZone from, TimeZone to)
	Convert a timestamp between two supported local civil time zones.
ts_ms_t	time_shield::zone_to_gmt_ms (ts_ms_t local_ms, TimeZone zone)
	Convert supported local civil time in milliseconds to GMT (UTC).
ts_ms_t	time_shield::gmt_to_zone_ms (ts_ms_t gmt_ms, TimeZone zone)
	Convert GMT (UTC) in milliseconds to a supported local civil time zone.
ts_ms_t	time_shield::convert_time_zone_ms (ts_ms_t local_ms, TimeZone from, TimeZone to)
	Convert a millisecond timestamp between two supported local civil time zones.
ts_t	time_shield::ist_to_gmt (ts_t ist)
ts_t	time_shield::gmt_to_ist (ts_t gmt)
ts_t	time_shield::myt_to_gmt (ts_t myt)
ts_t	time_shield::gmt_to_myt (ts_t gmt)
ts_t	time_shield::wib_to_gmt (ts_t wib)
ts_t	time_shield::gmt_to_wib (ts_t gmt)
ts_t	time_shield::wita_to_gmt (ts_t wita)
ts_t	time_shield::gmt_to_wita (ts_t gmt)
ts_t	time_shield::wit_to_gmt (ts_t wit)
ts_t	time_shield::gmt_to_wit (ts_t gmt)
ts_t	time_shield::kzt_to_gmt (ts_t kzt)
ts_t	time_shield::gmt_to_kzt (ts_t gmt)
ts_t	time_shield::trt_to_gmt (ts_t trt)
ts_t	time_shield::gmt_to_trt (ts_t gmt)
ts_t	time_shield::byt_to_gmt (ts_t byt)
ts_t	time_shield::gmt_to_byt (ts_t gmt)
ts_t	time_shield::sgt_to_gmt (ts_t sgt)
ts_t	time_shield::gmt_to_sgt (ts_t gmt)
ts_t	time_shield::ict_to_gmt (ts_t ict)
ts_t	time_shield::gmt_to_ict (ts_t gmt)
ts_t	time_shield::pht_to_gmt (ts_t pht)
ts_t	time_shield::gmt_to_pht (ts_t gmt)
ts_t	time_shield::gst_to_gmt (ts_t gst)
ts_t	time_shield::gmt_to_gst (ts_t gmt)
ts_t	time_shield::hkt_to_gmt (ts_t hkt)
ts_t	time_shield::gmt_to_hkt (ts_t gmt)
ts_t	time_shield::jst_to_gmt (ts_t jst)
ts_t	time_shield::gmt_to_jst (ts_t gmt)
ts_t	time_shield::kst_to_gmt (ts_t kst)
ts_t	time_shield::gmt_to_kst (ts_t gmt)
ts_t	time_shield::kyiv_to_gmt (ts_t kyiv)
	Convert Kyiv civil time to GMT using the EET/EEST rules.
ts_t	time_shield::gmt_to_kyiv (ts_t gmt)
	Convert GMT to Kyiv civil time using the EET/EEST rules.
TIME_SHIELD_CONSTEXPR ts_t	time_shield::to_utc (ts_t local, tz_t utc_offset) noexcept
	Convert local timestamp (seconds) to UTC using UTC offset.
TIME_SHIELD_CONSTEXPR ts_t	time_shield::to_local (ts_t utc, tz_t utc_offset) noexcept
	Convert UTC timestamp (seconds) to local time using UTC offset.
TIME_SHIELD_CONSTEXPR ts_ms_t	time_shield::to_utc_ms (ts_ms_t local_ms, tz_t utc_offset) noexcept
	Convert local timestamp (milliseconds) to UTC using UTC offset.
TIME_SHIELD_CONSTEXPR ts_ms_t	time_shield::to_local_ms (ts_ms_t utc_ms, tz_t utc_offset) noexcept
	Convert UTC timestamp (milliseconds) to local time using UTC offset.
TIME_SHIELD_CONSTEXPR tz_t	time_shield::utc_offset_of (const TimeZoneStruct &tz) noexcept
	Extract numeric UTC offset (in seconds) from TimeZoneStruct.

Detailed Description

Function Documentation

◆ byt_to_gmt()

ts_t time_shield::byt_to_gmt ( ts_t byt )

inline

Definition at line 550 of file time_zone_conversions.hpp.

◆ cet_to_gmt()

ts_t time_shield::cet_to_gmt ( ts_t cet )

inline

Convert Central European Time to Greenwich Mean Time.

Parameters

cet	Timestamp in seconds in CET/CEST.

Returns: Timestamp in seconds in GMT.

Definition at line 280 of file time_zone_conversions.hpp.

◆ convert_time_zone()

ts_t time_shield::convert_time_zone	(	ts_t	local,
		TimeZone	from,
		TimeZone	to )

inline

Convert a timestamp between two supported local civil time zones.

Parameters

local	Timestamp in seconds in the source time zone.
from	Source time zone.
to	Destination time zone.

Returns: Timestamp in seconds in the destination time zone, or ERROR_TIMESTAMP on failure.

Definition at line 442 of file time_zone_conversions.hpp.

◆ convert_time_zone_ms()

ts_ms_t time_shield::convert_time_zone_ms	(	ts_ms_t	local_ms,
		TimeZone	from,
		TimeZone	to )

inline

Convert a millisecond timestamp between two supported local civil time zones.

Parameters

local_ms	Timestamp in milliseconds in the source time zone.
from	Source time zone.
to	Destination time zone.

Returns: Timestamp in milliseconds in the destination time zone, or ERROR_TIMESTAMP on failure.

Definition at line 523 of file time_zone_conversions.hpp.

◆ ct_to_gmt()

ts_t time_shield::ct_to_gmt ( ts_t ct )

inline

Convert US Central Time (America/Chicago, CST/CDT) to GMT (UTC).

Parameters

ct	Timestamp in seconds in CT.

Returns: Timestamp in seconds in GMT (UTC).

Definition at line 334 of file time_zone_conversions.hpp.

◆ eet_to_gmt()

ts_t time_shield::eet_to_gmt ( ts_t eet )

inline

Convert Eastern European Time to Greenwich Mean Time.

Parameters

eet	Timestamp in seconds in EET/EEST.

Returns: Timestamp in seconds in GMT.

Definition at line 287 of file time_zone_conversions.hpp.

◆ et_to_gmt()

ts_t time_shield::et_to_gmt ( ts_t et )

inline

Convert US Eastern Time (New York, EST/EDT) to GMT (UTC).

Parameters

et	Timestamp in seconds in ET.

Returns: Timestamp in seconds in GMT (UTC).

Definition at line 301 of file time_zone_conversions.hpp.

◆ gmt_to_byt()

ts_t time_shield::gmt_to_byt ( ts_t gmt )

inline

Definition at line 551 of file time_zone_conversions.hpp.

◆ gmt_to_cet()

ts_t time_shield::gmt_to_cet ( ts_t gmt )

inline

Convert Greenwich Mean Time to Central European Time.

Parameters

gmt	Timestamp in seconds in GMT.

Returns: Timestamp in seconds in CET/CEST.

Definition at line 348 of file time_zone_conversions.hpp.

◆ gmt_to_ct()

ts_t time_shield::gmt_to_ct ( ts_t gmt )

inline

Convert GMT (UTC) to US Central Time (America/Chicago, CST/CDT).

Parameters

gmt	Timestamp in seconds in GMT (UTC).

Returns: Timestamp in seconds in CT.

Definition at line 341 of file time_zone_conversions.hpp.

◆ gmt_to_eet()

ts_t time_shield::gmt_to_eet ( ts_t gmt )

inline

Convert Greenwich Mean Time to Eastern European Time.

Parameters

gmt	Timestamp in seconds in GMT.

Returns: Timestamp in seconds in EET/EEST.

Definition at line 355 of file time_zone_conversions.hpp.

◆ gmt_to_et()

ts_t time_shield::gmt_to_et ( ts_t gmt )

inline

Convert GMT (UTC) to US Eastern Time (New York, EST/EDT).

Parameters

gmt	Timestamp in seconds in GMT (UTC).

Returns: Timestamp in seconds in ET.

Definition at line 310 of file time_zone_conversions.hpp.

◆ gmt_to_gst()

ts_t time_shield::gmt_to_gst ( ts_t gmt )

inline

Definition at line 563 of file time_zone_conversions.hpp.

◆ gmt_to_hkt()

ts_t time_shield::gmt_to_hkt ( ts_t gmt )

inline

Definition at line 566 of file time_zone_conversions.hpp.

◆ gmt_to_ict()

ts_t time_shield::gmt_to_ict ( ts_t gmt )

inline

Definition at line 557 of file time_zone_conversions.hpp.

◆ gmt_to_ist()

ts_t time_shield::gmt_to_ist ( ts_t gmt )

inline

Definition at line 530 of file time_zone_conversions.hpp.

◆ gmt_to_jst()

ts_t time_shield::gmt_to_jst ( ts_t gmt )

inline

Definition at line 569 of file time_zone_conversions.hpp.

◆ gmt_to_kst()

ts_t time_shield::gmt_to_kst ( ts_t gmt )

inline

Definition at line 572 of file time_zone_conversions.hpp.

◆ gmt_to_kyiv()

ts_t time_shield::gmt_to_kyiv ( ts_t gmt )

inline

Convert GMT to Kyiv civil time using the EET/EEST rules.

Definition at line 578 of file time_zone_conversions.hpp.

◆ gmt_to_kzt()

ts_t time_shield::gmt_to_kzt ( ts_t gmt )

inline

Definition at line 545 of file time_zone_conversions.hpp.

◆ gmt_to_myt()

ts_t time_shield::gmt_to_myt ( ts_t gmt )

inline

Definition at line 533 of file time_zone_conversions.hpp.

◆ gmt_to_ny()

ts_t time_shield::gmt_to_ny ( ts_t gmt )

inline

Convert GMT (UTC) to New York Time.

Parameters

gmt	Timestamp in seconds in GMT (UTC).

Returns: Timestamp in seconds in ET.

Definition at line 327 of file time_zone_conversions.hpp.

◆ gmt_to_pht()

ts_t time_shield::gmt_to_pht ( ts_t gmt )

inline

Definition at line 560 of file time_zone_conversions.hpp.

◆ gmt_to_sgt()

ts_t time_shield::gmt_to_sgt ( ts_t gmt )

inline

Definition at line 554 of file time_zone_conversions.hpp.

◆ gmt_to_trt()

ts_t time_shield::gmt_to_trt ( ts_t gmt )

inline

Definition at line 548 of file time_zone_conversions.hpp.

◆ gmt_to_wib()

ts_t time_shield::gmt_to_wib ( ts_t gmt )

inline

Definition at line 536 of file time_zone_conversions.hpp.

◆ gmt_to_wit()

ts_t time_shield::gmt_to_wit ( ts_t gmt )

inline

Definition at line 542 of file time_zone_conversions.hpp.

◆ gmt_to_wita()

ts_t time_shield::gmt_to_wita ( ts_t gmt )

inline

Definition at line 539 of file time_zone_conversions.hpp.

◆ gmt_to_zone()

ts_t time_shield::gmt_to_zone	(	ts_t	gmt,
		TimeZone	zone )

inline

Convert GMT (UTC) to a supported local civil time zone.

Parameters

gmt	Timestamp in seconds in GMT (UTC).
zone	Destination time zone.

Returns: Timestamp in seconds in the destination time zone, or ERROR_TIMESTAMP for unsupported zones.

Definition at line 402 of file time_zone_conversions.hpp.

◆ gmt_to_zone_ms()

ts_ms_t time_shield::gmt_to_zone_ms	(	ts_ms_t	gmt_ms,
		TimeZone	zone )

inline

Convert GMT (UTC) in milliseconds to a supported local civil time zone.

Parameters

gmt_ms	Timestamp in milliseconds in GMT (UTC).
zone	Destination time zone.

Returns: Timestamp in milliseconds in the destination time zone, or ERROR_TIMESTAMP for unsupported zones.

Definition at line 487 of file time_zone_conversions.hpp.

◆ gst_to_gmt()

ts_t time_shield::gst_to_gmt ( ts_t gst )

inline

Definition at line 562 of file time_zone_conversions.hpp.

◆ hkt_to_gmt()

ts_t time_shield::hkt_to_gmt ( ts_t hkt )

inline

Definition at line 565 of file time_zone_conversions.hpp.

◆ ict_to_gmt()

ts_t time_shield::ict_to_gmt ( ts_t ict )

inline

Definition at line 556 of file time_zone_conversions.hpp.

◆ is_us_eastern_dst_local()

bool time_shield::is_us_eastern_dst_local ( const DateTimeStruct & dt )

inline

Check if local US Eastern time uses DST.

Parameters

dt	Local time in ET.

Returns: True if DST applies for the provided local timestamp.

Definition at line 294 of file time_zone_conversions.hpp.

◆ ist_to_gmt()

ts_t time_shield::ist_to_gmt ( ts_t ist )

inline

Definition at line 529 of file time_zone_conversions.hpp.

◆ jst_to_gmt()

ts_t time_shield::jst_to_gmt ( ts_t jst )

inline

Definition at line 568 of file time_zone_conversions.hpp.

◆ kst_to_gmt()

ts_t time_shield::kst_to_gmt ( ts_t kst )

inline

Definition at line 571 of file time_zone_conversions.hpp.

◆ kyiv_to_gmt()

ts_t time_shield::kyiv_to_gmt ( ts_t kyiv )

inline

Convert Kyiv civil time to GMT using the EET/EEST rules.

Definition at line 575 of file time_zone_conversions.hpp.

◆ kzt_to_gmt()

ts_t time_shield::kzt_to_gmt ( ts_t kzt )

inline

Definition at line 544 of file time_zone_conversions.hpp.

◆ myt_to_gmt()

ts_t time_shield::myt_to_gmt ( ts_t myt )

inline

Definition at line 532 of file time_zone_conversions.hpp.

◆ ny_to_gmt()

ts_t time_shield::ny_to_gmt ( ts_t ny )

inline

Convert New York Time to GMT (UTC).

Parameters

ny	Timestamp in seconds in ET.

Returns: Timestamp in seconds in GMT (UTC).

Definition at line 320 of file time_zone_conversions.hpp.

◆ pht_to_gmt()

ts_t time_shield::pht_to_gmt ( ts_t pht )

inline

Definition at line 559 of file time_zone_conversions.hpp.

◆ sgt_to_gmt()

ts_t time_shield::sgt_to_gmt ( ts_t sgt )

inline

Definition at line 553 of file time_zone_conversions.hpp.

◆ to_local()

TIME_SHIELD_CONSTEXPR ts_t time_shield::to_local	(	ts_t	utc,
		tz_t	utc_offset )

inlinenoexcept

Convert UTC timestamp (seconds) to local time using UTC offset.

Parameters

utc	UTC timestamp in seconds.
utc_offset	UTC offset in seconds (e.g. CET=+3600, MSK=+10800, EST=-18000).

Returns: Local timestamp in seconds. If utc equals ERROR_TIMESTAMP, returns ERROR_TIMESTAMP.

Definition at line 43 of file time_zone_offset.hpp.

◆ to_local_ms()

TIME_SHIELD_CONSTEXPR ts_ms_t time_shield::to_local_ms	(	ts_ms_t	utc_ms,
		tz_t	utc_offset )

inlinenoexcept

Convert UTC timestamp (milliseconds) to local time using UTC offset.

Parameters

utc_ms	UTC timestamp in milliseconds.
utc_offset	UTC offset in seconds (will be converted to milliseconds).

Returns: Local timestamp in milliseconds. If utc_ms equals ERROR_TIMESTAMP, returns ERROR_TIMESTAMP.

Definition at line 61 of file time_zone_offset.hpp.

◆ to_utc()

TIME_SHIELD_CONSTEXPR ts_t time_shield::to_utc	(	ts_t	local,
		tz_t	utc_offset )

inlinenoexcept

Convert local timestamp (seconds) to UTC using UTC offset.

Parameters

local	Local timestamp in seconds.
utc_offset	UTC offset in seconds (e.g. CET=+3600, MSK=+10800, EST=-18000).

Returns: UTC timestamp in seconds. If local equals ERROR_TIMESTAMP, returns ERROR_TIMESTAMP.

Definition at line 34 of file time_zone_offset.hpp.

◆ to_utc_ms()

TIME_SHIELD_CONSTEXPR ts_ms_t time_shield::to_utc_ms	(	ts_ms_t	local_ms,
		tz_t	utc_offset )

inlinenoexcept

Convert local timestamp (milliseconds) to UTC using UTC offset.

Parameters

local_ms	Local timestamp in milliseconds.
utc_offset	UTC offset in seconds (will be converted to milliseconds).

Returns: UTC timestamp in milliseconds. If local_ms equals ERROR_TIMESTAMP, returns ERROR_TIMESTAMP.

Definition at line 52 of file time_zone_offset.hpp.

◆ trt_to_gmt()

ts_t time_shield::trt_to_gmt ( ts_t trt )

inline

Definition at line 547 of file time_zone_conversions.hpp.

◆ utc_offset_of()

TIME_SHIELD_CONSTEXPR tz_t time_shield::utc_offset_of ( const TimeZoneStruct & tz )

inlinenoexcept

Extract numeric UTC offset (in seconds) from TimeZoneStruct.

Parameters

tz	Time zone descriptor.

Returns: UTC offset in seconds (local = utc + offset).

Definition at line 69 of file time_zone_offset.hpp.

◆ wib_to_gmt()

ts_t time_shield::wib_to_gmt ( ts_t wib )

inline

Definition at line 535 of file time_zone_conversions.hpp.

◆ wit_to_gmt()

ts_t time_shield::wit_to_gmt ( ts_t wit )

inline

Definition at line 541 of file time_zone_conversions.hpp.

◆ wita_to_gmt()

ts_t time_shield::wita_to_gmt ( ts_t wita )

inline

Definition at line 538 of file time_zone_conversions.hpp.

◆ zone_to_gmt()

ts_t time_shield::zone_to_gmt	(	ts_t	local,
		TimeZone	zone )

inline

Convert supported local civil time to GMT (UTC).

Parameters

local	Timestamp in seconds in the source time zone.
zone	Source time zone.

Returns: Timestamp in seconds in GMT, or ERROR_TIMESTAMP for unsupported zones.

Definition at line 363 of file time_zone_conversions.hpp.

◆ zone_to_gmt_ms()

ts_ms_t time_shield::zone_to_gmt_ms	(	ts_ms_t	local_ms,
		TimeZone	zone )

inline

Convert supported local civil time in milliseconds to GMT (UTC).

Parameters

local_ms	Timestamp in milliseconds in the source time zone.
zone	Source time zone.

Returns: Timestamp in milliseconds in GMT, or ERROR_TIMESTAMP for unsupported zones.

Definition at line 452 of file time_zone_conversions.hpp.