Basics
Guides
API Reference
Basics
Guides
API Reference
[31:7] extends: object
A GTimeZone represents a time zone, at no particular point in time. The
GTimeZone struct is refcounted and immutable. Each time zone has an
identifier (for example, ‘Europe/London’) which is platform dependent. See
[ctor@GLib.TimeZone.new] for information on the identifier formats. The
identifier of a time zone can be retrieved using
[method@GLib.TimeZone.get_identifier]. A time zone contains a number of
intervals. Each interval has an abbreviation to describe it (for example,
‘PDT’), an offset to UTC and a flag indicating if the daylight savings time
is in effect during that interval. A time zone always has at least one
interval — interval 0. Note that interval abbreviations are not the same as
time zone identifiers (apart from ‘UTC’), and cannot be passed to
[ctor@GLib.TimeZone.new]. Every UTC time is contained within exactly one
interval, but a given local time may be contained within zero, one or two
intervals (due to incontinuities associated with daylight savings time). An
interval may refer to a specific period of time (eg: the duration of daylight
savings time during 2010) or it may refer to many periods of time that share
the same properties (eg: all periods of daylight savings time). It is also
possible (usually for political reasons) that some properties (like the
abbreviation) change between intervals without other properties changing.
GTimeZone (identifier = null)
A version of g_time_zone_new_identifier() which returns the UTC time zone if @identifier could not be parsed or loaded. If you need to check whether @identifier was loaded successfully, use g_time_zone_new_identifier().
identifier is a timezone identifier.toNativeHandle (Source)
Normalizes a constructor argument into a raw pointer carrier. Accepts a raw NativeHandle, a raw NativeBuffer returned from
fn.call(...), another generated wrapper exposinghandle(), or null. Returns null when the argument carries no pointer.
Source is the raw handle, raw buffer, wrapper, or null.A raw pointer carrier or null when no pointer is present.getLib ()
Returns the opened native library for this generated wrapper.
The opened native library.handle ()
Returns the wrapped NativeHandle.
The wrapped NativeHandle.isNull ()
Returns true when the wrapped handle is null.
A bool.describe ()
Returns a small string for debugging generated wrappers.
A string.adjust_time (string type, int time_)
Finds an interval within @tz that corresponds to the given @time_, possibly adjusting @time_ if required to fit into an interval. The meaning of @time_ depends on @type. This function is similar to g_time_zone_find_interval(), with the difference that it always succeeds (by making the adjustments described below). In any of the cases where g_time_zone_find_interval() succeeds then this function returns the same value, without modifying @time_. This function may, however, modify
in order to deal with non-existent times. If the non-existent local @time_ of 02:30 were requested on March 14th 2010 in Toronto then this function would adjust @time_ to be 03:00 and return the interval containing the adjusted time.type is the #GTimeType of @time_.time_ is a pointer to a number of seconds since January 1, 1970.the interval containing @time_, never -1.find_interval (string type, int time_)
Finds an interval within @tz that corresponds to the given @time_. The meaning of @time_ depends on @type. If @type is %G_TIME_TYPE_UNIVERSAL then this function will always succeed (since universal time is monotonic and continuous). Otherwise @time_ is treated as local time. The distinction between %G_TIME_TYPE_STANDARD and %G_TIME_TYPE_DAYLIGHT is ignored except in the case that the given @time_ is ambiguous. In Toronto, for example, 01:30 on November 7th 2010 occurred twice (once inside of daylight savings time and the next, an hour later, outside of daylight savings time). In this case, the different value of @type would result in a different interval being returned. It is still possible for this function to fail. In Toronto, for example, 02:00 on March 14th 2010 does not exist (due to the leap forward to begin daylight savings time). -1 is returned in that case.
type is the #GTimeType of @time_.time_ is a number of seconds since January 1, 1970.the interval containing @time_, or -1 in case of failure.get_abbreviation (int interval)
Determines the time zone abbreviation to be used during a particular
of time in the time zone @tz. For example, in Toronto this is currently "EST" during the winter months and "EDT" during the summer months when daylight savings time is in effect.interval is an interval within the timezone.the time zone abbreviation, which belongs to @tz.get_identifier ()
Get the identifier of this #GTimeZone, as passed to g_time_zone_new(). If the identifier passed at construction time was not recognised,
UTCwill be returned. If it was %NULL, the identifier of the local timezone at construction time will be returned. The identifier will be returned in the same format as provided at construction time: if provided as a time offset, that will be returned by this function.
identifier for this timezone.get_offset (int interval)
Determines the offset to UTC in effect during a particular @interval of time in the time zone @tz. The offset is the number of seconds that you add to UTC time to arrive at local time for @tz (ie: negative numbers for time zones west of GMT, positive numbers for east).
interval is an interval within the timezone.the number of seconds that should be added to UTC to get the local time in @tz.is_dst (int interval)
Determines if daylight savings time is in effect during a particular
of time in the time zone @tz.interval is an interval within the timezone.%TRUE if daylight savings time is in effect.ref ()
Increases the reference count on @tz.
a new reference to @tz..unref ()
Decreases the reference count on @tz.
None.[246:14] static extends: object
Alternate constructors for GTimeZone. Usage:
GTimeZoneCtors.<name>(...). The primary constructor lives
directly on GTimeZone.
newIdentifier (string identifier)
Creates a #GTimeZone corresponding to @identifier. If @identifier cannot be parsed or loaded, %NULL is returned. @identifier can either be an RFC3339/ISO 8601 time offset or something that would pass as a valid value for the
TZenvironment variable (including %NULL). In Windows,
can also be the unlocalized name of a time zone for standard time, for example "Pacific Standard Time". Valid RFC3339 time offsets are "Z" (for UTC) or "±hh:mm". ISO 8601 additionally specifies "±hhmm" and "±hh". Offsets are time values to be added to Coordinated Universal Time (UTC) to get the local time. In UNIX, the TZ environment variable typically corresponds to the name of a file in the zoneinfo database, an absolute path to a file somewhere else, or a string in "std offset [dst [offset],start[/time],end[/time]]" (POSIX) format. There are no spaces in the specification. The name of standard and daylight savings time zone must be three or more alphabetic characters. Offsets are time values to be added to local time to get Coordinated Universal Time (UTC) and should be "[±]hh[[:]mm[:ss]]". Dates are either "Jn" (Julian day with n between 1 and 365, leap years not counted), "n" (zero-based Julian day with n between 0 and 365) or "Mm.w.d" (day d (0 <= d <= 6) of week w (1 <= w <= 5) of month m (1 <= m <= 12), day 0 is a Sunday). Times are in local wall clock time, the default is 02:00:00. In Windows, the "tzn[+|–]hh[:mm[:ss]][dzn]" format is used, but also accepts POSIX format. The Windows format uses US rules for all time zones; daylight savings time is 60 minutes behind the standard time with date and time of change taken from Pacific Standard Time. Offsets are time values to be added to the local time to get Coordinated Universal Time (UTC). g_time_zone_new_local() calls this function with the value of the TZ environment variable. This function itself is independent of the value of TZ, but if @identifier is %NULL then /etc/localtime will be consulted to discover the correct time zone on UNIX and the registry will be consulted or GetTimeZoneInformation() will be used to get the local time zone on Windows. If intervals are not available, only time zone rules from TZ environment variable or other means, then they will be computed from year 1900 to 2037. If the maximum year for the rules is available and it is greater than 2037, then it will followed instead. See RFC3339 §5.6 for a precise definition of valid RFC3339 time offsets (the time-offset expansion) and ISO 8601 for the full list of valid time offsets. See The GNU C Library manual for an explanation of the possible values of the TZ environment variable. See Microsoft Time Zone Index Values for the list of time zones on Windows. You should release the return value by calling g_time_zone_unref() when you are done with it.identifier is a timezone identifier.A new GTimeZone.newLocal ()
Creates a #GTimeZone corresponding to local time. The local time zone may change between invocations to this function; for example, if the system administrator changes it. This is equivalent to calling g_time_zone_new() with the value of the
TZenvironment variable (including the possibility of %NULL). You should release the return value by calling g_time_zone_unref() when you are done with it.
A new GTimeZone.newOffset (int seconds)
Creates a #GTimeZone corresponding to the given constant offset from UTC, in seconds. This is equivalent to calling g_time_zone_new() with a string in the form
[+|-]hh[:mm[:ss]]. It is possible for this function to fail if @seconds is too big (greater than 24 hours), in which case this function will return the UTC timezone for backwards compatibility. To detect failures like this, use g_time_zone_new_identifier() directly.
seconds is offset to UTC, in seconds.A new GTimeZone.newUtc ()
Creates a #GTimeZone corresponding to UTC. This is equivalent to calling g_time_zone_new() with a value like "Z", "UTC", "+00", etc. You should release the return value by calling g_time_zone_unref() when you are done with it.
A new GTimeZone.
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