Struct glib::DateTime [−][src]
pub struct DateTime(_);
Expand description
GDateTime
is an opaque structure whose members
cannot be accessed directly.
Implementations
Creates a new DateTime
corresponding to the given date and time in
the time zone tz
.
The year
must be between 1 and 9999, month
between 1 and 12 and day
between 1 and 28, 29, 30 or 31 depending on the month and the year.
hour
must be between 0 and 23 and minute
must be between 0 and 59.
seconds
must be at least 0.0 and must be strictly less than 60.0.
It will be rounded down to the nearest microsecond.
If the given time is not representable in the given time zone (for example, 02:30 on March 14th 2010 in Toronto, due to daylight savings time) then the time will be rounded up to the nearest existing time (in this case, 03:00). If this matters to you then you should verify the return value for containing the same as the numbers you gave.
In the case that the given time is ambiguous in the given time zone (for example, 01:30 on November 7th 2010 in Toronto, due to daylight savings time) then the time falling within standard (ie: non-daylight) time is taken.
It not considered a programmer error for the values to this function
to be out of range, but in the case that they are, the function will
return None
.
You should release the return value by calling g_date_time_unref()
when you are done with it.
tz
a TimeZone
year
the year component of the date
month
the month component of the date
day
the day component of the date
hour
the hour component of the date
minute
the minute component of the date
seconds
the number of seconds past the minute
Returns
This is supported on crate feature v2_56
only.
v2_56
only.Creates a DateTime
corresponding to the given
ISO 8601 formatted string
text
. ISO 8601 strings of the form <date>``<sep>``<time>``<tz>
are supported, with
some extensions from RFC 3339 as
mentioned below.
Note that as DateTime
“is oblivious to leap seconds”, leap seconds information
in an ISO-8601 string will be ignored, so a 23:59:60
time would be parsed as
23:59:59
.
<sep>
is the separator and can be either ‘T’, ‘t’ or ’ ’. The latter two
separators are an extension from
RFC 3339.
<date>
is in the form:
YYYY-MM-DD
- Year/month/day, e.g. 2016-08-24.YYYYMMDD
- Same as above without dividers.YYYY-DDD
- Ordinal day where DDD is from 001 to 366, e.g. 2016-237.YYYYDDD
- Same as above without dividers.YYYY-Www-D
- Week day where ww is from 01 to 52 and D from 1-7, e.g. 2016-W34-3.YYYYWwwD
- Same as above without dividers.
<time>
is in the form:
hh:mm:ss(.sss)
- Hours, minutes, seconds (subseconds), e.g. 22:10:42.123.hhmmss(.sss)
- Same as above without dividers.
<tz>
is an optional timezone suffix of the form:
Z
- UTC.+hh:mm
or-hh:mm
- Offset from UTC in hours and minutes, e.g. +12:00.+hh
or-hh
- Offset from UTC in hours, e.g. +12.
If the timezone is not provided in text
it must be provided in default_tz
(this field is otherwise ignored).
This call can fail (returning None
) if text
is not a valid ISO 8601
formatted string.
You should release the return value by calling g_date_time_unref()
when you are done with it.
text
an ISO 8601 formatted time string.
default_tz
a TimeZone
to use if the text doesn’t contain a
timezone, or None
.
Returns
Creates a DateTime
corresponding to the given Unix time t
in the
local time zone.
Unix time is the number of seconds that have elapsed since 1970-01-01 00:00:00 UTC, regardless of the local time offset.
This call can fail (returning None
) if t
represents a time outside
of the supported range of DateTime
.
You should release the return value by calling g_date_time_unref()
when you are done with it.
t
the Unix time
Returns
Creates a DateTime
corresponding to the given Unix time t
in UTC.
Unix time is the number of seconds that have elapsed since 1970-01-01 00:00:00 UTC.
This call can fail (returning None
) if t
represents a time outside
of the supported range of DateTime
.
You should release the return value by calling g_date_time_unref()
when you are done with it.
t
the Unix time
Returns
Creates a new DateTime
corresponding to the given date and time in
the local time zone.
This call is equivalent to calling new()
with the time
zone returned by TimeZone::new_local()
.
year
the year component of the date
month
the month component of the date
day
the day component of the date
hour
the hour component of the date
minute
the minute component of the date
seconds
the number of seconds past the minute
Returns
Creates a DateTime
corresponding to this exact instant in the given
time zone tz
. The time is as accurate as the system allows, to a
maximum accuracy of 1 microsecond.
This function will always succeed unless GLib is still being used after the year 9999.
You should release the return value by calling g_date_time_unref()
when you are done with it.
tz
a TimeZone
Returns
Creates a new DateTime
corresponding to the given date and time in
UTC.
This call is equivalent to calling new()
with the time
zone returned by TimeZone::new_utc()
.
year
the year component of the date
month
the month component of the date
day
the day component of the date
hour
the hour component of the date
minute
the minute component of the date
seconds
the number of seconds past the minute
Returns
Creates a new DateTime
adding the specified values to the current date and
time in self
. Add negative values to subtract.
years
the number of years to add
months
the number of months to add
days
the number of days to add
hours
the number of hours to add
minutes
the number of minutes to add
seconds
the number of seconds to add
Returns
the newly created DateTime
which
should be freed with g_date_time_unref()
, or None
Creates a copy of self
and adds the specified number of months to the
copy. Add negative values to subtract months.
The day of the month of the resulting DateTime
is clamped to the number
of days in the updated calendar month. For example, if adding 1 month to
31st January 2018, the result would be 28th February 2018. In 2020 (a leap
year), the result would be 29th February.
months
the number of months
Returns
the newly created DateTime
which
should be freed with g_date_time_unref()
, or None
Creates a copy of self
and adds the specified number of years to the
copy. Add negative values to subtract years.
As with add_months()
, if the resulting date would be 29th
February on a non-leap year, the day will be clamped to 28th February.
years
the number of years
Returns
the newly created DateTime
which
should be freed with g_date_time_unref()
, or None
Creates a newly allocated string representing the requested format
.
The format strings understood by this function are a subset of the
strftime()
format language as specified by C99. The `D, \
U and \
W conversions are not supported, nor is the 'E' modifier. The GNU extensions \
k, \
l, \
s and \
P are supported, however, as are the '0', '_' and '-' modifiers. The Python extension \
f` is also supported.
In contrast to strftime()
, this function always produces a UTF-8
string, regardless of the current locale. Note that the rendering of
many formats is locale-dependent and may not match the strftime()
output exactly.
The following format specifiers are supported:
- `a`: the abbreviated weekday name according to the current locale
- `A`: the full weekday name according to the current locale
- `b`: the abbreviated month name according to the current locale
- `B`: the full month name according to the current locale
- `c`: the preferred date and time representation for the current locale
- `C`: the century number (year/100) as a 2-digit integer (00-99)
- `d`: the day of the month as a decimal number (range 01 to 31)
- `e`: the day of the month as a decimal number (range 1 to 31)
- `F
: equivalent to ``Y
-m
-`d`` (the ISO 8601 date format) - `g
: the last two digits of the ISO 8601 week-based year as a decimal number (00-99). This works well with \
Vand \
u`. - `G
: the ISO 8601 week-based year as a decimal number. This works well with \
Vand \
u`. - `h
: equivalent to \
b` - `H`: the hour as a decimal number using a 24-hour clock (range 00 to 23)
- `I`: the hour as a decimal number using a 12-hour clock (range 01 to 12)
- `j`: the day of the year as a decimal number (range 001 to 366)
- `k`: the hour (24-hour clock) as a decimal number (range 0 to 23); single digits are preceded by a blank
- `l`: the hour (12-hour clock) as a decimal number (range 1 to 12); single digits are preceded by a blank
- `m`: the month as a decimal number (range 01 to 12)
- `M`: the minute as a decimal number (range 00 to 59)
- `f`: the microsecond as a decimal number (range 000000 to 999999)
- `p
: either "AM" or "PM" according to the given time value, or the corresponding strings for the current locale. Noon is treated as "PM" and midnight as "AM". Use of this format specifier is discouraged, as many locales have no concept of AM/PM formatting. Use \
cor \
X` instead. - `P
: like \
pbut lowercase: "am" or "pm" or a corresponding string for the current locale. Use of this format specifier is discouraged, as many locales have no concept of AM/PM formatting. Use \
cor \
X` instead. - `r
: the time in a.m. or p.m. notation. Use of this format specifier is discouraged, as many locales have no concept of AM/PM formatting. Use \
cor \
X` instead. - `R
: the time in 24-hour notation (\
H:\
M`) - `s`: the number of seconds since the Epoch, that is, since 1970-01-01 00:00:00 UTC
- `S`: the second as a decimal number (range 00 to 60)
- `t`: a tab character
- `T
: the time in 24-hour notation with seconds (\
H:\
M:\
S`) - `u
: the ISO 8601 standard day of the week as a decimal, range 1 to 7, Monday being 1. This works well with \
Gand \
V`. - `V
: the ISO 8601 standard week number of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the new year. See [
week_of_year()][Self::week_of_year()]. This works well with \
Gand \
u`. - `w
: the day of the week as a decimal, range 0 to 6, Sunday being 0. This is not the ISO 8601 standard format -- use \
u` instead. - `x`: the preferred date representation for the current locale without the time
- `X`: the preferred time representation for the current locale without the date
- `y`: the year as a decimal number without the century
- `Y`: the year as a decimal number including the century
- `z`: the time zone as an offset from UTC (+hhmm)
- %:z: the time zone as an offset from UTC (+hh:mm).
This is a gnulib
strftime()
extension. Since: 2.38 - %::z: the time zone as an offset from UTC (+hh:mm:ss). This is a
gnulib
strftime()
extension. Since: 2.38 - %:::z: the time zone as an offset from UTC, with : to necessary
precision (e.g., -04, +05:30). This is a gnulib
strftime()
extension. Since: 2.38 - `Z`: the time zone or name or abbreviation
- %%: a literal % character
Some conversion specifications can be modified by preceding the conversion specifier by one or more modifier characters. The following modifiers are supported for many of the numeric conversions:
- O: Use alternative numeric symbols, if the current locale supports those.
- _: Pad a numeric result with spaces. This overrides the default padding for the specifier.
- -: Do not pad a numeric result. This overrides the default padding for the specifier.
- 0: Pad a numeric result with zeros. This overrides the default padding for the specifier.
Additionally, when O is used with B, b, or h, it produces the alternative
form of a month name. The alternative form should be used when the month
name is used without a day number (e.g., standalone). It is required in
some languages (Baltic, Slavic, Greek, and more) due to their grammatical
rules. For other languages there is no difference. `OBis a GNU and BSD
strftime() extension expected to be added to the future POSIX specification,
Ob and \
Ohare GNU
strftime()` extensions. Since: 2.56
format
a valid UTF-8 string, containing the format for the
DateTime
Returns
a newly allocated string formatted to
the requested format or None
in the case that there was an error (such
as a format specifier not being supported in the current locale). The
string should be freed with g_free()
.
This is supported on crate feature v2_62
only.
v2_62
only.Format self
in ISO 8601 format,
including the date, time and time zone, and return that as a UTF-8 encoded
string.
Since GLib 2.66, this will output to sub-second precision if needed.
Returns
a newly allocated string formatted in
ISO 8601 format or None
in the case that there was an error. The string
should be freed with g_free()
.
Retrieves the day of the month represented by self
in the gregorian
calendar.
Returns
the day of the month
Retrieves the ISO 8601 day of the week on which self
falls (1 is
Monday, 2 is Tuesday… 7 is Sunday).
Returns
the day of the week
Retrieves the day of the year represented by self
in the Gregorian
calendar.
Returns
the day of the year
Retrieves the month of the year represented by self
in the Gregorian
calendar.
Returns
the month represented by self
Retrieves the number of seconds since the start of the last minute, including the fractional part.
Returns
the number of seconds
This is supported on crate feature v2_58
only.
v2_58
only.Determines the time zone abbreviation to be used at the time and in
the time zone of self
.
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.
Returns
the time zone abbreviation. The returned
string is owned by the DateTime
and it should not be
modified or freed
Determines the offset to UTC in effect at the time and in the time
zone of self
.
The offset is the number of microseconds that you add to UTC time to arrive at local time for the time zone (ie: negative numbers for time zones west of GMT, positive numbers for east).
If self
represents UTC time, then the offset is always zero.
Returns
the number of microseconds that should be added to UTC to get the local time
Returns the ISO 8601 week-numbering year in which the week containing
self
falls.
This function, taken together with week_of_year()
and
day_of_week()
can be used to determine the full ISO
week date on which self
falls.
This is usually equal to the normal Gregorian year (as returned by
year()
), except as detailed below:
For Thursday, the week-numbering year is always equal to the usual calendar year. For other days, the number is such that every day within a complete week (Monday to Sunday) is contained within the same week-numbering year.
For Monday, Tuesday and Wednesday occurring near the end of the year, this may mean that the week-numbering year is one greater than the calendar year (so that these days have the same week-numbering year as the Thursday occurring early in the next year).
For Friday, Saturday and Sunday occurring near the start of the year, this may mean that the week-numbering year is one less than the calendar year (so that these days have the same week-numbering year as the Thursday occurring late in the previous year).
An equivalent description is that the week-numbering year is equal to the calendar year containing the majority of the days in the current week (Monday to Sunday).
Note that January 1 0001 in the proleptic Gregorian calendar is a Monday, so this function never returns 0.
Returns
the ISO 8601 week-numbering year for self
Returns the ISO 8601 week number for the week containing self
.
The ISO 8601 week number is the same for every day of the week (from
Moday through Sunday). That can produce some unusual results
(described below).
The first week of the year is week 1. This is the week that contains the first Thursday of the year. Equivalently, this is the first week that has more than 4 of its days falling within the calendar year.
The value 0 is never returned by this function. Days contained within a year but occurring before the first ISO 8601 week of that year are considered as being contained in the last week of the previous year. Similarly, the final days of a calendar year may be considered as being part of the first ISO 8601 week of the next year if 4 or more days of that week are contained within the new year.
Returns
the ISO 8601 week number for self
.
Retrieves the year represented by self
in the Gregorian calendar.
Returns
the year represented by self
Creates a new DateTime
corresponding to the same instant in time as
self
, but in the local time zone.
This call is equivalent to calling to_timezone()
with the
time zone returned by TimeZone::new_local()
.
Returns
the newly created DateTime
which
should be freed with g_date_time_unref()
, or None
Create a new DateTime
corresponding to the same instant in time as
self
, but in the time zone tz
.
This call can fail in the case that the time goes out of bounds. For example, converting 0001-01-01 00:00:00 UTC to a time zone west of Greenwich will fail (due to the year 0 being out of range).
tz
the new TimeZone
Returns
the newly created DateTime
which
should be freed with g_date_time_unref()
, or None
Gives the Unix time corresponding to self
, rounding down to the
nearest second.
Unix time is the number of seconds that have elapsed since 1970-01-01
00:00:00 UTC, regardless of the time zone associated with self
.
Returns
the Unix time corresponding to self
Creates a new DateTime
corresponding to the same instant in time as
self
, but in UTC.
This call is equivalent to calling to_timezone()
with the
time zone returned by TimeZone::new_utc()
.
Returns
the newly created DateTime
which
should be freed with g_date_time_unref()
, or None
Trait Implementations
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Returns the type identifier of Self
.
Auto Trait Implementations
Blanket Implementations
Mutably borrows from an owned value. Read more
Returns a SendValue
clone of self
.
impl<'a, T, C> FromValueOptional<'a> for T where
C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError>,
T: FromValue<'a, Checker = C>,