Struct glib::DateTime[][src]

pub struct DateTime(_);
Expand description

An opaque structure that represents a date and time, including a time zone.

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

a new DateTime, or None

This is supported on crate feature 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

a new DateTime, or None

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

a new DateTime, or None

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

a new DateTime, or None

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

a DateTime, or None

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

a new DateTime, or None

Creates a DateTime corresponding to this exact instant in the local time zone.

This is equivalent to calling new_now() with the time zone returned by TimeZone::new_local().

Returns

a new DateTime, or None

Creates a DateTime corresponding to this exact instant in UTC.

This is equivalent to calling new_now() with the time zone returned by TimeZone::new_utc().

Returns

a new DateTime, or None

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

a DateTime, or None

Creates a copy of self and adds the specified timespan to the copy.

timespan

a GTimeSpan

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 days to the copy. Add negative values to subtract days.

days

the number of days

Returns

the newly created DateTime which should be freed with g_date_time_unref(), or None

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 hours. Add negative values to subtract hours.

hours

the number of hours to add

Returns

the newly created DateTime which should be freed with g_date_time_unref(), or None

Creates a copy of self adding the specified number of minutes. Add negative values to subtract minutes.

minutes

the number of minutes 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 seconds. Add negative values to subtract seconds.

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 weeks to the copy. Add negative values to subtract weeks.

weeks

the number of weeks

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

Calculates the difference in time between self and begin. The GTimeSpan that is returned is effectively self - begin (ie: positive if the first parameter is larger).

begin

a DateTime

Returns

the difference between the two DateTime, as a time span expressed in microseconds.

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 \V and \u`.
  • `G: the ISO 8601 week-based year as a decimal number. This works well with \V and \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 \c or \X` instead.
  • `P: like \p but 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 \c or \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 \c or \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 \G and \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 \G and \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 BSDstrftime() extension expected to be added to the future POSIX specification, Ob and \Ohare GNUstrftime()` 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.

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 hour of the day represented by self

Returns

the hour of the day

Retrieves the microsecond of the date represented by self

Returns

the microsecond of the second

Retrieves the minute of the hour represented by self

Returns

the minute of the hour

Retrieves the month of the year represented by self in the Gregorian calendar.

Returns

the month represented by self

Retrieves the second of the minute represented by self

Returns

the second 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.

Get the time zone for this self.

Returns

the time zone

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

Retrieves the Gregorian day, month, and year of a given DateTime.

Returns
year

the return location for the gregorian year, or None.

month

the return location for the month of the year, or None.

day

the return location for the day of the month, or None.

Determines if daylight savings time is in effect at the time and in the time zone of self.

Returns

true if daylight savings time is in effect

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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Returns the type identifier of Self.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

Returns a SendValue clone of self.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.