| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/chrono-0.4.26/src/offset/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../chrono/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../chrono/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// This is a part of Chrono. |
| // See README.md and LICENSE.txt for details. |
| |
| </span><span class="doccomment">//! The time zone, which calculates offsets from the local time to UTC. |
| //! |
| //! There are four operations provided by the `TimeZone` trait: |
| //! |
| //! 1. Converting the local `NaiveDateTime` to `DateTime<Tz>` |
| //! 2. Converting the UTC `NaiveDateTime` to `DateTime<Tz>` |
| //! 3. Converting `DateTime<Tz>` to the local `NaiveDateTime` |
| //! 4. Constructing `DateTime<Tz>` objects from various offsets |
| //! |
| //! 1 is used for constructors. 2 is used for the `with_timezone` method of date and time types. |
| //! 3 is used for other methods, e.g. `year()` or `format()`, and provided by an associated type |
| //! which implements `Offset` (which then passed to `TimeZone` for actual implementations). |
| //! Technically speaking `TimeZone` has a total knowledge about given timescale, |
| //! but `Offset` is used as a cache to avoid the repeated conversion |
| //! and provides implementations for 1 and 3. |
| //! An `TimeZone` instance can be reconstructed from the corresponding `Offset` instance. |
| |
| </span><span class="kw">use </span>core::fmt; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::format::{parse, ParseResult, Parsed, StrftimeItems}; |
| <span class="kw">use </span><span class="kw">crate</span>::naive::{NaiveDate, NaiveDateTime, NaiveTime}; |
| <span class="kw">use </span><span class="kw">crate</span>::Weekday; |
| <span class="attribute">#[allow(deprecated)] |
| </span><span class="kw">use crate</span>::{Date, DateTime}; |
| |
| <span class="kw">mod </span>fixed; |
| <span class="kw">pub use </span><span class="self">self</span>::fixed::FixedOffset; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"clock"</span>)] |
| </span><span class="kw">mod </span>local; |
| <span class="attribute">#[cfg(feature = <span class="string">"clock"</span>)] |
| </span><span class="kw">pub use </span><span class="self">self</span>::local::Local; |
| |
| <span class="kw">mod </span>utc; |
| <span class="kw">pub use </span><span class="self">self</span>::utc::Utc; |
| |
| <span class="doccomment">/// The conversion result from the local time to the timezone-aware datetime types. |
| </span><span class="attribute">#[derive(Clone, PartialEq, Debug, Copy, Eq, Hash)] |
| </span><span class="kw">pub enum </span>LocalResult<T> { |
| <span class="doccomment">/// Given local time representation is invalid. |
| /// This can occur when, for example, the positive timezone transition. |
| </span><span class="prelude-val">None</span>, |
| <span class="doccomment">/// Given local time representation has a single unique result. |
| </span>Single(T), |
| <span class="doccomment">/// Given local time representation has multiple results and thus ambiguous. |
| /// This can occur when, for example, the negative timezone transition. |
| </span>Ambiguous(T <span class="comment">/*min*/</span>, T <span class="comment">/*max*/</span>), |
| } |
| |
| <span class="kw">impl</span><T> LocalResult<T> { |
| <span class="doccomment">/// Returns `Some` only when the conversion result is unique, or `None` otherwise. |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>single(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(t) => <span class="prelude-val">Some</span>(t), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Returns `Some` for the earliest possible conversion result, or `None` if none. |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>earliest(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(t) | LocalResult::Ambiguous(t, <span class="kw">_</span>) => <span class="prelude-val">Some</span>(t), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Returns `Some` for the latest possible conversion result, or `None` if none. |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>latest(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(t) | LocalResult::Ambiguous(<span class="kw">_</span>, t) => <span class="prelude-val">Some</span>(t), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Maps a `LocalResult<T>` into `LocalResult<U>` with given function. |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>map<U, F: FnMut(T) -> U>(<span class="self">self</span>, <span class="kw-2">mut </span>f: F) -> LocalResult<U> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::None => LocalResult::None, |
| LocalResult::Single(v) => LocalResult::Single(f(v)), |
| LocalResult::Ambiguous(min, max) => LocalResult::Ambiguous(f(min), f(max)), |
| } |
| } |
| } |
| |
| <span class="attribute">#[allow(deprecated)] |
| </span><span class="kw">impl</span><Tz: TimeZone> LocalResult<Date<Tz>> { |
| <span class="doccomment">/// Makes a new `DateTime` from the current date and given `NaiveTime`. |
| /// The offset in the current date is preserved. |
| /// |
| /// Propagates any error. Ambiguous result would be discarded. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_time(<span class="self">self</span>, time: NaiveTime) -> LocalResult<DateTime<Tz>> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(d) => { |
| d.and_time(time).map_or(LocalResult::None, LocalResult::Single) |
| } |
| <span class="kw">_ </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute and second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Propagates any error. Ambiguous result would be discarded. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_opt(<span class="self">self</span>, hour: u32, min: u32, sec: u32) -> LocalResult<DateTime<Tz>> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(d) => { |
| d.and_hms_opt(hour, min, sec).map_or(LocalResult::None, LocalResult::Single) |
| } |
| <span class="kw">_ </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and millisecond. |
| /// The millisecond part can exceed 1,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Propagates any error. Ambiguous result would be discarded. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_milli_opt( |
| <span class="self">self</span>, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| milli: u32, |
| ) -> LocalResult<DateTime<Tz>> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(d) => d |
| .and_hms_milli_opt(hour, min, sec, milli) |
| .map_or(LocalResult::None, LocalResult::Single), |
| <span class="kw">_ </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and microsecond. |
| /// The microsecond part can exceed 1,000,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Propagates any error. Ambiguous result would be discarded. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_micro_opt( |
| <span class="self">self</span>, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| micro: u32, |
| ) -> LocalResult<DateTime<Tz>> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(d) => d |
| .and_hms_micro_opt(hour, min, sec, micro) |
| .map_or(LocalResult::None, LocalResult::Single), |
| <span class="kw">_ </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the current date, hour, minute, second and nanosecond. |
| /// The nanosecond part can exceed 1,000,000,000 in order to represent the leap second. |
| /// The offset in the current date is preserved. |
| /// |
| /// Propagates any error. Ambiguous result would be discarded. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>and_hms_nano_opt( |
| <span class="self">self</span>, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| nano: u32, |
| ) -> LocalResult<DateTime<Tz>> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::Single(d) => d |
| .and_hms_nano_opt(hour, min, sec, nano) |
| .map_or(LocalResult::None, LocalResult::Single), |
| <span class="kw">_ </span>=> LocalResult::None, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T: fmt::Debug> LocalResult<T> { |
| <span class="doccomment">/// Returns the single unique conversion result, or panics accordingly. |
| </span><span class="attribute">#[must_use] |
| #[track_caller] |
| </span><span class="kw">pub fn </span>unwrap(<span class="self">self</span>) -> T { |
| <span class="kw">match </span><span class="self">self </span>{ |
| LocalResult::None => <span class="macro">panic!</span>(<span class="string">"No such local time"</span>), |
| LocalResult::Single(t) => t, |
| LocalResult::Ambiguous(t1, t2) => { |
| <span class="macro">panic!</span>(<span class="string">"Ambiguous local time, ranging from {:?} to {:?}"</span>, t1, t2) |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// The offset from the local time to UTC. |
| </span><span class="kw">pub trait </span>Offset: Sized + Clone + fmt::Debug { |
| <span class="doccomment">/// Returns the fixed offset from UTC to the local time stored. |
| </span><span class="kw">fn </span>fix(<span class="kw-2">&</span><span class="self">self</span>) -> FixedOffset; |
| } |
| |
| <span class="doccomment">/// The time zone. |
| /// |
| /// The methods here are the primarily constructors for [`Date`](../struct.Date.html) and |
| /// [`DateTime`](../struct.DateTime.html) types. |
| </span><span class="kw">pub trait </span>TimeZone: Sized + Clone { |
| <span class="doccomment">/// An associated offset type. |
| /// This type is used to store the actual offset in date and time types. |
| /// The original `TimeZone` value can be recovered via `TimeZone::from_offset`. |
| </span><span class="kw">type </span>Offset: Offset; |
| |
| <span class="doccomment">/// Make a new `DateTime` from year, month, day, time components and current time zone. |
| /// |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// |
| /// Returns `LocalResult::None` on invalid input data. |
| </span><span class="kw">fn </span>with_ymd_and_hms( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| year: i32, |
| month: u32, |
| day: u32, |
| hour: u32, |
| min: u32, |
| sec: u32, |
| ) -> LocalResult<DateTime<<span class="self">Self</span>>> { |
| <span class="kw">match </span>NaiveDate::from_ymd_opt(year, month, day).and_then(|d| d.and_hms_opt(hour, min, sec)) |
| { |
| <span class="prelude-val">Some</span>(dt) => <span class="self">self</span>.from_local_datetime(<span class="kw-2">&</span>dt), |
| <span class="prelude-val">None </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` from year, month, day and the current time zone. |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// |
| /// The time zone normally does not affect the date (unless it is between UTC-24 and UTC+24), |
| /// but it will propagate to the `DateTime` values constructed via this date. |
| /// |
| /// Panics on the out-of-range date, invalid month and/or day. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `with_ymd_and_hms()` instead"</span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>ymd(<span class="kw-2">&</span><span class="self">self</span>, year: i32, month: u32, day: u32) -> Date<<span class="self">Self</span>> { |
| <span class="self">self</span>.ymd_opt(year, month, day).unwrap() |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` from year, month, day and the current time zone. |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// |
| /// The time zone normally does not affect the date (unless it is between UTC-24 and UTC+24), |
| /// but it will propagate to the `DateTime` values constructed via this date. |
| /// |
| /// Returns `None` on the out-of-range date, invalid month and/or day. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `with_ymd_and_hms()` instead"</span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>ymd_opt(<span class="kw-2">&</span><span class="self">self</span>, year: i32, month: u32, day: u32) -> LocalResult<Date<<span class="self">Self</span>>> { |
| <span class="kw">match </span>NaiveDate::from_ymd_opt(year, month, day) { |
| <span class="prelude-val">Some</span>(d) => <span class="self">self</span>.from_local_date(<span class="kw-2">&</span>d), |
| <span class="prelude-val">None </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` from year, day of year (DOY or "ordinal") and the current time zone. |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// |
| /// The time zone normally does not affect the date (unless it is between UTC-24 and UTC+24), |
| /// but it will propagate to the `DateTime` values constructed via this date. |
| /// |
| /// Panics on the out-of-range date and/or invalid DOY. |
| </span><span class="attribute">#[deprecated( |
| since = <span class="string">"0.4.23"</span>, |
| note = <span class="string">"use `from_local_datetime()` with a `NaiveDateTime` instead" |
| </span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>yo(<span class="kw-2">&</span><span class="self">self</span>, year: i32, ordinal: u32) -> Date<<span class="self">Self</span>> { |
| <span class="self">self</span>.yo_opt(year, ordinal).unwrap() |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` from year, day of year (DOY or "ordinal") and the current time zone. |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// |
| /// The time zone normally does not affect the date (unless it is between UTC-24 and UTC+24), |
| /// but it will propagate to the `DateTime` values constructed via this date. |
| /// |
| /// Returns `None` on the out-of-range date and/or invalid DOY. |
| </span><span class="attribute">#[deprecated( |
| since = <span class="string">"0.4.23"</span>, |
| note = <span class="string">"use `from_local_datetime()` with a `NaiveDateTime` instead" |
| </span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>yo_opt(<span class="kw-2">&</span><span class="self">self</span>, year: i32, ordinal: u32) -> LocalResult<Date<<span class="self">Self</span>>> { |
| <span class="kw">match </span>NaiveDate::from_yo_opt(year, ordinal) { |
| <span class="prelude-val">Some</span>(d) => <span class="self">self</span>.from_local_date(<span class="kw-2">&</span>d), |
| <span class="prelude-val">None </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` from ISO week date (year and week number), day of the week (DOW) and |
| /// the current time zone. |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// The resulting `Date` may have a different year from the input year. |
| /// |
| /// The time zone normally does not affect the date (unless it is between UTC-24 and UTC+24), |
| /// but it will propagate to the `DateTime` values constructed via this date. |
| /// |
| /// Panics on the out-of-range date and/or invalid week number. |
| </span><span class="attribute">#[deprecated( |
| since = <span class="string">"0.4.23"</span>, |
| note = <span class="string">"use `from_local_datetime()` with a `NaiveDateTime` instead" |
| </span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>isoywd(<span class="kw-2">&</span><span class="self">self</span>, year: i32, week: u32, weekday: Weekday) -> Date<<span class="self">Self</span>> { |
| <span class="self">self</span>.isoywd_opt(year, week, weekday).unwrap() |
| } |
| |
| <span class="doccomment">/// Makes a new `Date` from ISO week date (year and week number), day of the week (DOW) and |
| /// the current time zone. |
| /// This assumes the proleptic Gregorian calendar, with the year 0 being 1 BCE. |
| /// The resulting `Date` may have a different year from the input year. |
| /// |
| /// The time zone normally does not affect the date (unless it is between UTC-24 and UTC+24), |
| /// but it will propagate to the `DateTime` values constructed via this date. |
| /// |
| /// Returns `None` on the out-of-range date and/or invalid week number. |
| </span><span class="attribute">#[deprecated( |
| since = <span class="string">"0.4.23"</span>, |
| note = <span class="string">"use `from_local_datetime()` with a `NaiveDateTime` instead" |
| </span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>isoywd_opt(<span class="kw-2">&</span><span class="self">self</span>, year: i32, week: u32, weekday: Weekday) -> LocalResult<Date<<span class="self">Self</span>>> { |
| <span class="kw">match </span>NaiveDate::from_isoywd_opt(year, week, weekday) { |
| <span class="prelude-val">Some</span>(d) => <span class="self">self</span>.from_local_date(<span class="kw-2">&</span>d), |
| <span class="prelude-val">None </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the number of non-leap seconds |
| /// since January 1, 1970 0:00:00 UTC (aka "UNIX timestamp") |
| /// and the number of nanoseconds since the last whole non-leap second. |
| /// |
| /// Panics on the out-of-range number of seconds and/or invalid nanosecond, |
| /// for a non-panicking version see [`timestamp_opt`](#method.timestamp_opt). |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `timestamp_opt()` instead"</span>)] |
| </span><span class="kw">fn </span>timestamp(<span class="kw-2">&</span><span class="self">self</span>, secs: i64, nsecs: u32) -> DateTime<<span class="self">Self</span>> { |
| <span class="self">self</span>.timestamp_opt(secs, nsecs).unwrap() |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the number of non-leap seconds |
| /// since January 1, 1970 0:00:00 UTC (aka "UNIX timestamp") |
| /// and the number of nanoseconds since the last whole non-leap second. |
| /// |
| /// Returns `LocalResult::None` on out-of-range number of seconds and/or |
| /// invalid nanosecond, otherwise always returns `LocalResult::Single`. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Utc, TimeZone}; |
| /// |
| /// assert_eq!(Utc.timestamp_opt(1431648000, 0).unwrap().to_string(), "2015-05-15 00:00:00 UTC"); |
| /// ``` |
| </span><span class="kw">fn </span>timestamp_opt(<span class="kw-2">&</span><span class="self">self</span>, secs: i64, nsecs: u32) -> LocalResult<DateTime<<span class="self">Self</span>>> { |
| <span class="kw">match </span>NaiveDateTime::from_timestamp_opt(secs, nsecs) { |
| <span class="prelude-val">Some</span>(dt) => LocalResult::Single(<span class="self">self</span>.from_utc_datetime(<span class="kw-2">&</span>dt)), |
| <span class="prelude-val">None </span>=> LocalResult::None, |
| } |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the number of non-leap milliseconds |
| /// since January 1, 1970 0:00:00 UTC (aka "UNIX timestamp"). |
| /// |
| /// Panics on out-of-range number of milliseconds for a non-panicking |
| /// version see [`timestamp_millis_opt`](#method.timestamp_millis_opt). |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `timestamp_millis_opt()` instead"</span>)] |
| </span><span class="kw">fn </span>timestamp_millis(<span class="kw-2">&</span><span class="self">self</span>, millis: i64) -> DateTime<<span class="self">Self</span>> { |
| <span class="self">self</span>.timestamp_millis_opt(millis).unwrap() |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the number of non-leap milliseconds |
| /// since January 1, 1970 0:00:00 UTC (aka "UNIX timestamp"). |
| /// |
| /// |
| /// Returns `LocalResult::None` on out-of-range number of milliseconds |
| /// and/or invalid nanosecond, otherwise always returns |
| /// `LocalResult::Single`. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Utc, TimeZone, LocalResult}; |
| /// match Utc.timestamp_millis_opt(1431648000) { |
| /// LocalResult::Single(dt) => assert_eq!(dt.timestamp(), 1431648), |
| /// _ => panic!("Incorrect timestamp_millis"), |
| /// }; |
| /// ``` |
| </span><span class="kw">fn </span>timestamp_millis_opt(<span class="kw-2">&</span><span class="self">self</span>, millis: i64) -> LocalResult<DateTime<<span class="self">Self</span>>> { |
| <span class="kw">let </span>(<span class="kw-2">mut </span>secs, <span class="kw-2">mut </span>millis) = (millis / <span class="number">1000</span>, millis % <span class="number">1000</span>); |
| <span class="kw">if </span>millis < <span class="number">0 </span>{ |
| secs -= <span class="number">1</span>; |
| millis += <span class="number">1000</span>; |
| } |
| <span class="self">self</span>.timestamp_opt(secs, millis <span class="kw">as </span>u32 * <span class="number">1_000_000</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `DateTime` from the number of non-leap nanoseconds |
| /// since January 1, 1970 0:00:00 UTC (aka "UNIX timestamp"). |
| /// |
| /// Unlike [`timestamp_millis`](#method.timestamp_millis), this never |
| /// panics. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Utc, TimeZone}; |
| /// |
| /// assert_eq!(Utc.timestamp_nanos(1431648000000000).timestamp(), 1431648); |
| /// ``` |
| </span><span class="kw">fn </span>timestamp_nanos(<span class="kw-2">&</span><span class="self">self</span>, nanos: i64) -> DateTime<<span class="self">Self</span>> { |
| <span class="kw">let </span>(<span class="kw-2">mut </span>secs, <span class="kw-2">mut </span>nanos) = (nanos / <span class="number">1_000_000_000</span>, nanos % <span class="number">1_000_000_000</span>); |
| <span class="kw">if </span>nanos < <span class="number">0 </span>{ |
| secs -= <span class="number">1</span>; |
| nanos += <span class="number">1_000_000_000</span>; |
| } |
| <span class="self">self</span>.timestamp_opt(secs, nanos <span class="kw">as </span>u32).unwrap() |
| } |
| |
| <span class="doccomment">/// Parses a string with the specified format string and returns a |
| /// `DateTime` with the current offset. |
| /// |
| /// See the [`crate::format::strftime`] module on the |
| /// supported escape sequences. |
| /// |
| /// If the to-be-parsed string includes an offset, it *must* match the |
| /// offset of the TimeZone, otherwise an error will be returned. |
| /// |
| /// See also [`DateTime::parse_from_str`] which gives a [`DateTime`] with |
| /// parsed [`FixedOffset`]. |
| </span><span class="kw">fn </span>datetime_from_str(<span class="kw-2">&</span><span class="self">self</span>, s: <span class="kw-2">&</span>str, fmt: <span class="kw-2">&</span>str) -> ParseResult<DateTime<<span class="self">Self</span>>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>parsed = Parsed::new(); |
| parse(<span class="kw-2">&mut </span>parsed, s, StrftimeItems::new(fmt))<span class="question-mark">?</span>; |
| parsed.to_datetime_with_timezone(<span class="self">self</span>) |
| } |
| |
| <span class="doccomment">/// Reconstructs the time zone from the offset. |
| </span><span class="kw">fn </span>from_offset(offset: <span class="kw-2">&</span><span class="self">Self</span>::Offset) -> <span class="self">Self</span>; |
| |
| <span class="doccomment">/// Creates the offset(s) for given local `NaiveDate` if possible. |
| </span><span class="kw">fn </span>offset_from_local_date(<span class="kw-2">&</span><span class="self">self</span>, local: <span class="kw-2">&</span>NaiveDate) -> LocalResult<<span class="self">Self</span>::Offset>; |
| |
| <span class="doccomment">/// Creates the offset(s) for given local `NaiveDateTime` if possible. |
| </span><span class="kw">fn </span>offset_from_local_datetime(<span class="kw-2">&</span><span class="self">self</span>, local: <span class="kw-2">&</span>NaiveDateTime) -> LocalResult<<span class="self">Self</span>::Offset>; |
| |
| <span class="doccomment">/// Converts the local `NaiveDate` to the timezone-aware `Date` if possible. |
| </span><span class="attribute">#[allow(clippy::wrong_self_convention)] |
| #[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_local_datetime()` instead"</span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>from_local_date(<span class="kw-2">&</span><span class="self">self</span>, local: <span class="kw-2">&</span>NaiveDate) -> LocalResult<Date<<span class="self">Self</span>>> { |
| <span class="self">self</span>.offset_from_local_date(local).map(|offset| { |
| <span class="comment">// since FixedOffset is within +/- 1 day, the date is never affected |
| </span>Date::from_utc(<span class="kw-2">*</span>local, offset) |
| }) |
| } |
| |
| <span class="doccomment">/// Converts the local `NaiveDateTime` to the timezone-aware `DateTime` if possible. |
| </span><span class="attribute">#[allow(clippy::wrong_self_convention)] |
| </span><span class="kw">fn </span>from_local_datetime(<span class="kw-2">&</span><span class="self">self</span>, local: <span class="kw-2">&</span>NaiveDateTime) -> LocalResult<DateTime<<span class="self">Self</span>>> { |
| <span class="self">self</span>.offset_from_local_datetime(local) |
| .map(|offset| DateTime::from_utc(<span class="kw-2">*</span>local - offset.fix(), offset)) |
| } |
| |
| <span class="doccomment">/// Creates the offset for given UTC `NaiveDate`. This cannot fail. |
| </span><span class="kw">fn </span>offset_from_utc_date(<span class="kw-2">&</span><span class="self">self</span>, utc: <span class="kw-2">&</span>NaiveDate) -> <span class="self">Self</span>::Offset; |
| |
| <span class="doccomment">/// Creates the offset for given UTC `NaiveDateTime`. This cannot fail. |
| </span><span class="kw">fn </span>offset_from_utc_datetime(<span class="kw-2">&</span><span class="self">self</span>, utc: <span class="kw-2">&</span>NaiveDateTime) -> <span class="self">Self</span>::Offset; |
| |
| <span class="doccomment">/// Converts the UTC `NaiveDate` to the local time. |
| /// The UTC is continuous and thus this cannot fail (but can give the duplicate local time). |
| </span><span class="attribute">#[allow(clippy::wrong_self_convention)] |
| #[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_utc_datetime()` instead"</span>)] |
| #[allow(deprecated)] |
| </span><span class="kw">fn </span>from_utc_date(<span class="kw-2">&</span><span class="self">self</span>, utc: <span class="kw-2">&</span>NaiveDate) -> Date<<span class="self">Self</span>> { |
| Date::from_utc(<span class="kw-2">*</span>utc, <span class="self">self</span>.offset_from_utc_date(utc)) |
| } |
| |
| <span class="doccomment">/// Converts the UTC `NaiveDateTime` to the local time. |
| /// The UTC is continuous and thus this cannot fail (but can give the duplicate local time). |
| </span><span class="attribute">#[allow(clippy::wrong_self_convention)] |
| </span><span class="kw">fn </span>from_utc_datetime(<span class="kw-2">&</span><span class="self">self</span>, utc: <span class="kw-2">&</span>NaiveDateTime) -> DateTime<<span class="self">Self</span>> { |
| DateTime::from_utc(<span class="kw-2">*</span>utc, <span class="self">self</span>.offset_from_utc_datetime(utc)) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_negative_millis() { |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">1000</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:59 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">7000</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:53 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">7001</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:52.999 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">7003</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:52.997 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">999</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:59.001 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">1</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:59.999 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">60000</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:00 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_millis_opt(-<span class="number">3600000</span>).unwrap(); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:00:00 UTC"</span>); |
| |
| <span class="kw">for </span>(millis, expected) <span class="kw">in </span><span class="kw-2">&</span>[ |
| (-<span class="number">7000</span>, <span class="string">"1969-12-31 23:59:53 UTC"</span>), |
| (-<span class="number">7001</span>, <span class="string">"1969-12-31 23:59:52.999 UTC"</span>), |
| (-<span class="number">7003</span>, <span class="string">"1969-12-31 23:59:52.997 UTC"</span>), |
| ] { |
| <span class="kw">match </span>Utc.timestamp_millis_opt(<span class="kw-2">*</span>millis) { |
| LocalResult::Single(dt) => { |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="kw-2">*</span>expected); |
| } |
| e => <span class="macro">panic!</span>(<span class="string">"Got {:?} instead of an okay answer"</span>, e), |
| } |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_negative_nanos() { |
| <span class="kw">let </span>dt = Utc.timestamp_nanos(-<span class="number">1_000_000_000</span>); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:59 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_nanos(-<span class="number">999_999_999</span>); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:59.000000001 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_nanos(-<span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:59.999999999 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_nanos(-<span class="number">60_000_000_000</span>); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:59:00 UTC"</span>); |
| <span class="kw">let </span>dt = Utc.timestamp_nanos(-<span class="number">3_600_000_000_000</span>); |
| <span class="macro">assert_eq!</span>(dt.to_string(), <span class="string">"1969-12-31 23:00:00 UTC"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_nanos_never_panics() { |
| Utc.timestamp_nanos(i64::max_value()); |
| Utc.timestamp_nanos(i64::default()); |
| Utc.timestamp_nanos(i64::min_value()); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="chrono" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |