Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1102 insertions, 0 deletions

diff --git a/vendor/chrono/src/offset/fixed.rs b/vendor/chrono/src/offset/fixed.rs
new file mode 100644
index 000000000..83f42a1a4
--- /dev/null
+++ b/vendor/chrono/src/offset/fixed.rs
@@ -0,0 +1,244 @@
+// This is a part of Chrono.
+// See README.md and LICENSE.txt for details.
+
+//! The time zone which has a fixed offset from UTC.
+
+use core::fmt;
+use core::ops::{Add, Sub};
+use oldtime::Duration as OldDuration;
+
+use super::{LocalResult, Offset, TimeZone};
+use div::div_mod_floor;
+use naive::{NaiveDate, NaiveDateTime, NaiveTime};
+use DateTime;
+use Timelike;
+
+/// The time zone with fixed offset, from UTC-23:59:59 to UTC+23:59:59.
+///
+/// Using the [`TimeZone`](./trait.TimeZone.html) methods
+/// on a `FixedOffset` struct is the preferred way to construct
+/// `DateTime<FixedOffset>` instances. See the [`east`](#method.east) and
+/// [`west`](#method.west) methods for examples.
+#[derive(PartialEq, Eq, Hash, Copy, Clone)]
+pub struct FixedOffset {
+    local_minus_utc: i32,
+}
+
+impl FixedOffset {
+    /// Makes a new `FixedOffset` for the Eastern Hemisphere with given timezone difference.
+    /// The negative `secs` means the Western Hemisphere.
+    ///
+    /// Panics on the out-of-bound `secs`.
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{FixedOffset, TimeZone};
+    /// let hour = 3600;
+    /// let datetime = FixedOffset::east(5 * hour).ymd(2016, 11, 08)
+    ///                                           .and_hms(0, 0, 0);
+    /// assert_eq!(&datetime.to_rfc3339(), "2016-11-08T00:00:00+05:00")
+    /// ~~~~
+    pub fn east(secs: i32) -> FixedOffset {
+        FixedOffset::east_opt(secs).expect("FixedOffset::east out of bounds")
+    }
+
+    /// Makes a new `FixedOffset` for the Eastern Hemisphere with given timezone difference.
+    /// The negative `secs` means the Western Hemisphere.
+    ///
+    /// Returns `None` on the out-of-bound `secs`.
+    pub fn east_opt(secs: i32) -> Option<FixedOffset> {
+        if -86_400 < secs && secs < 86_400 {
+            Some(FixedOffset { local_minus_utc: secs })
+        } else {
+            None
+        }
+    }
+
+    /// Makes a new `FixedOffset` for the Western Hemisphere with given timezone difference.
+    /// The negative `secs` means the Eastern Hemisphere.
+    ///
+    /// Panics on the out-of-bound `secs`.
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{FixedOffset, TimeZone};
+    /// let hour = 3600;
+    /// let datetime = FixedOffset::west(5 * hour).ymd(2016, 11, 08)
+    ///                                           .and_hms(0, 0, 0);
+    /// assert_eq!(&datetime.to_rfc3339(), "2016-11-08T00:00:00-05:00")
+    /// ~~~~
+    pub fn west(secs: i32) -> FixedOffset {
+        FixedOffset::west_opt(secs).expect("FixedOffset::west out of bounds")
+    }
+
+    /// Makes a new `FixedOffset` for the Western Hemisphere with given timezone difference.
+    /// The negative `secs` means the Eastern Hemisphere.
+    ///
+    /// Returns `None` on the out-of-bound `secs`.
+    pub fn west_opt(secs: i32) -> Option<FixedOffset> {
+        if -86_400 < secs && secs < 86_400 {
+            Some(FixedOffset { local_minus_utc: -secs })
+        } else {
+            None
+        }
+    }
+
+    /// Returns the number of seconds to add to convert from UTC to the local time.
+    #[inline]
+    pub fn local_minus_utc(&self) -> i32 {
+        self.local_minus_utc
+    }
+
+    /// Returns the number of seconds to add to convert from the local time to UTC.
+    #[inline]
+    pub fn utc_minus_local(&self) -> i32 {
+        -self.local_minus_utc
+    }
+}
+
+impl TimeZone for FixedOffset {
+    type Offset = FixedOffset;
+
+    fn from_offset(offset: &FixedOffset) -> FixedOffset {
+        *offset
+    }
+
+    fn offset_from_local_date(&self, _local: &NaiveDate) -> LocalResult<FixedOffset> {
+        LocalResult::Single(*self)
+    }
+    fn offset_from_local_datetime(&self, _local: &NaiveDateTime) -> LocalResult<FixedOffset> {
+        LocalResult::Single(*self)
+    }
+
+    fn offset_from_utc_date(&self, _utc: &NaiveDate) -> FixedOffset {
+        *self
+    }
+    fn offset_from_utc_datetime(&self, _utc: &NaiveDateTime) -> FixedOffset {
+        *self
+    }
+}
+
+impl Offset for FixedOffset {
+    fn fix(&self) -> FixedOffset {
+        *self
+    }
+}
+
+impl fmt::Debug for FixedOffset {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let offset = self.local_minus_utc;
+        let (sign, offset) = if offset < 0 { ('-', -offset) } else { ('+', offset) };
+        let (mins, sec) = div_mod_floor(offset, 60);
+        let (hour, min) = div_mod_floor(mins, 60);
+        if sec == 0 {
+            write!(f, "{}{:02}:{:02}", sign, hour, min)
+        } else {
+            write!(f, "{}{:02}:{:02}:{:02}", sign, hour, min, sec)
+        }
+    }
+}
+
+impl fmt::Display for FixedOffset {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Debug::fmt(self, f)
+    }
+}
+
+// addition or subtraction of FixedOffset to/from Timelike values is the same as
+// adding or subtracting the offset's local_minus_utc value
+// but keep keeps the leap second information.
+// this should be implemented more efficiently, but for the time being, this is generic right now.
+
+fn add_with_leapsecond<T>(lhs: &T, rhs: i32) -> T
+where
+    T: Timelike + Add<OldDuration, Output = T>,
+{
+    // extract and temporarily remove the fractional part and later recover it
+    let nanos = lhs.nanosecond();
+    let lhs = lhs.with_nanosecond(0).unwrap();
+    (lhs + OldDuration::seconds(i64::from(rhs))).with_nanosecond(nanos).unwrap()
+}
+
+impl Add<FixedOffset> for NaiveTime {
+    type Output = NaiveTime;
+
+    #[inline]
+    fn add(self, rhs: FixedOffset) -> NaiveTime {
+        add_with_leapsecond(&self, rhs.local_minus_utc)
+    }
+}
+
+impl Sub<FixedOffset> for NaiveTime {
+    type Output = NaiveTime;
+
+    #[inline]
+    fn sub(self, rhs: FixedOffset) -> NaiveTime {
+        add_with_leapsecond(&self, -rhs.local_minus_utc)
+    }
+}
+
+impl Add<FixedOffset> for NaiveDateTime {
+    type Output = NaiveDateTime;
+
+    #[inline]
+    fn add(self, rhs: FixedOffset) -> NaiveDateTime {
+        add_with_leapsecond(&self, rhs.local_minus_utc)
+    }
+}
+
+impl Sub<FixedOffset> for NaiveDateTime {
+    type Output = NaiveDateTime;
+
+    #[inline]
+    fn sub(self, rhs: FixedOffset) -> NaiveDateTime {
+        add_with_leapsecond(&self, -rhs.local_minus_utc)
+    }
+}
+
+impl<Tz: TimeZone> Add<FixedOffset> for DateTime<Tz> {
+    type Output = DateTime<Tz>;
+
+    #[inline]
+    fn add(self, rhs: FixedOffset) -> DateTime<Tz> {
+        add_with_leapsecond(&self, rhs.local_minus_utc)
+    }
+}
+
+impl<Tz: TimeZone> Sub<FixedOffset> for DateTime<Tz> {
+    type Output = DateTime<Tz>;
+
+    #[inline]
+    fn sub(self, rhs: FixedOffset) -> DateTime<Tz> {
+        add_with_leapsecond(&self, -rhs.local_minus_utc)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::FixedOffset;
+    use offset::TimeZone;
+
+    #[test]
+    fn test_date_extreme_offset() {
+        // starting from 0.3 we don't have an offset exceeding one day.
+        // this makes everything easier!
+        assert_eq!(
+            format!("{:?}", FixedOffset::east(86399).ymd(2012, 2, 29)),
+            "2012-02-29+23:59:59".to_string()
+        );
+        assert_eq!(
+            format!("{:?}", FixedOffset::east(86399).ymd(2012, 2, 29).and_hms(5, 6, 7)),
+            "2012-02-29T05:06:07+23:59:59".to_string()
+        );
+        assert_eq!(
+            format!("{:?}", FixedOffset::west(86399).ymd(2012, 3, 4)),
+            "2012-03-04-23:59:59".to_string()
+        );
+        assert_eq!(
+            format!("{:?}", FixedOffset::west(86399).ymd(2012, 3, 4).and_hms(5, 6, 7)),
+            "2012-03-04T05:06:07-23:59:59".to_string()
+        );
+    }
+}
diff --git a/vendor/chrono/src/offset/local.rs b/vendor/chrono/src/offset/local.rs
new file mode 100644
index 000000000..1abb3a9db
--- /dev/null
+++ b/vendor/chrono/src/offset/local.rs
@@ -0,0 +1,227 @@
+// This is a part of Chrono.
+// See README.md and LICENSE.txt for details.
+
+//! The local (system) time zone.
+
+#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+use sys::{self, Timespec};
+
+use super::fixed::FixedOffset;
+use super::{LocalResult, TimeZone};
+#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+use naive::NaiveTime;
+use naive::{NaiveDate, NaiveDateTime};
+use {Date, DateTime};
+#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+use {Datelike, Timelike};
+
+/// Converts a `time::Tm` struct into the timezone-aware `DateTime`.
+/// This assumes that `time` is working correctly, i.e. any error is fatal.
+#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+fn tm_to_datetime(mut tm: sys::Tm) -> DateTime<Local> {
+    if tm.tm_sec >= 60 {
+        tm.tm_nsec += (tm.tm_sec - 59) * 1_000_000_000;
+        tm.tm_sec = 59;
+    }
+
+    #[cfg(not(windows))]
+    fn tm_to_naive_date(tm: &sys::Tm) -> NaiveDate {
+        // from_yo is more efficient than from_ymd (since it's the internal representation).
+        NaiveDate::from_yo(tm.tm_year + 1900, tm.tm_yday as u32 + 1)
+    }
+
+    #[cfg(windows)]
+    fn tm_to_naive_date(tm: &sys::Tm) -> NaiveDate {
+        // ...but tm_yday is broken in Windows (issue #85)
+        NaiveDate::from_ymd(tm.tm_year + 1900, tm.tm_mon as u32 + 1, tm.tm_mday as u32)
+    }
+
+    let date = tm_to_naive_date(&tm);
+    let time = NaiveTime::from_hms_nano(
+        tm.tm_hour as u32,
+        tm.tm_min as u32,
+        tm.tm_sec as u32,
+        tm.tm_nsec as u32,
+    );
+    let offset = FixedOffset::east(tm.tm_utcoff);
+    DateTime::from_utc(date.and_time(time) - offset, offset)
+}
+
+/// Converts a local `NaiveDateTime` to the `time::Timespec`.
+#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+fn datetime_to_timespec(d: &NaiveDateTime, local: bool) -> sys::Timespec {
+    // well, this exploits an undocumented `Tm::to_timespec` behavior
+    // to get the exact function we want (either `timegm` or `mktime`).
+    // the number 1 is arbitrary but should be non-zero to trigger `mktime`.
+    let tm_utcoff = if local { 1 } else { 0 };
+
+    let tm = sys::Tm {
+        tm_sec: d.second() as i32,
+        tm_min: d.minute() as i32,
+        tm_hour: d.hour() as i32,
+        tm_mday: d.day() as i32,
+        tm_mon: d.month0() as i32, // yes, C is that strange...
+        tm_year: d.year() - 1900,  // this doesn't underflow, we know that d is `NaiveDateTime`.
+        tm_wday: 0,                // to_local ignores this
+        tm_yday: 0,                // and this
+        tm_isdst: -1,
+        tm_utcoff: tm_utcoff,
+        // do not set this, OS APIs are heavily inconsistent in terms of leap second handling
+        tm_nsec: 0,
+    };
+
+    tm.to_timespec()
+}
+
+/// The local timescale. This is implemented via the standard `time` crate.
+///
+/// Using the [`TimeZone`](./trait.TimeZone.html) methods
+/// on the Local struct is the preferred way to construct `DateTime<Local>`
+/// instances.
+///
+/// # Example
+///
+/// ~~~~
+/// use chrono::{Local, DateTime, TimeZone};
+///
+/// let dt: DateTime<Local> = Local::now();
+/// let dt: DateTime<Local> = Local.timestamp(0, 0);
+/// ~~~~
+#[derive(Copy, Clone, Debug)]
+pub struct Local;
+
+impl Local {
+    /// Returns a `Date` which corresponds to the current date.
+    pub fn today() -> Date<Local> {
+        Local::now().date()
+    }
+
+    /// Returns a `DateTime` which corresponds to the current date.
+    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    pub fn now() -> DateTime<Local> {
+        tm_to_datetime(Timespec::now().local())
+    }
+
+    /// Returns a `DateTime` which corresponds to the current date.
+    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    pub fn now() -> DateTime<Local> {
+        use super::Utc;
+        let now: DateTime<Utc> = super::Utc::now();
+
+        // Workaround missing timezone logic in `time` crate
+        let offset = FixedOffset::west((js_sys::Date::new_0().get_timezone_offset() as i32) * 60);
+        DateTime::from_utc(now.naive_utc(), offset)
+    }
+}
+
+impl TimeZone for Local {
+    type Offset = FixedOffset;
+
+    fn from_offset(_offset: &FixedOffset) -> Local {
+        Local
+    }
+
+    // they are easier to define in terms of the finished date and time unlike other offsets
+    fn offset_from_local_date(&self, local: &NaiveDate) -> LocalResult<FixedOffset> {
+        self.from_local_date(local).map(|date| *date.offset())
+    }
+
+    fn offset_from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<FixedOffset> {
+        self.from_local_datetime(local).map(|datetime| *datetime.offset())
+    }
+
+    fn offset_from_utc_date(&self, utc: &NaiveDate) -> FixedOffset {
+        *self.from_utc_date(utc).offset()
+    }
+
+    fn offset_from_utc_datetime(&self, utc: &NaiveDateTime) -> FixedOffset {
+        *self.from_utc_datetime(utc).offset()
+    }
+
+    // override them for avoiding redundant works
+    fn from_local_date(&self, local: &NaiveDate) -> LocalResult<Date<Local>> {
+        // this sounds very strange, but required for keeping `TimeZone::ymd` sane.
+        // in the other words, we use the offset at the local midnight
+        // but keep the actual date unaltered (much like `FixedOffset`).
+        let midnight = self.from_local_datetime(&local.and_hms(0, 0, 0));
+        midnight.map(|datetime| Date::from_utc(*local, *datetime.offset()))
+    }
+
+    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    fn from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<DateTime<Local>> {
+        let mut local = local.clone();
+        // Get the offset from the js runtime
+        let offset = FixedOffset::west((js_sys::Date::new_0().get_timezone_offset() as i32) * 60);
+        local -= ::Duration::seconds(offset.local_minus_utc() as i64);
+        LocalResult::Single(DateTime::from_utc(local, offset))
+    }
+
+    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    fn from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<DateTime<Local>> {
+        let timespec = datetime_to_timespec(local, true);
+
+        // datetime_to_timespec completely ignores leap seconds, so we need to adjust for them
+        let mut tm = timespec.local();
+        assert_eq!(tm.tm_nsec, 0);
+        tm.tm_nsec = local.nanosecond() as i32;
+
+        LocalResult::Single(tm_to_datetime(tm))
+    }
+
+    fn from_utc_date(&self, utc: &NaiveDate) -> Date<Local> {
+        let midnight = self.from_utc_datetime(&utc.and_hms(0, 0, 0));
+        Date::from_utc(*utc, *midnight.offset())
+    }
+
+    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Local> {
+        // Get the offset from the js runtime
+        let offset = FixedOffset::west((js_sys::Date::new_0().get_timezone_offset() as i32) * 60);
+        DateTime::from_utc(*utc, offset)
+    }
+
+    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Local> {
+        let timespec = datetime_to_timespec(utc, false);
+
+        // datetime_to_timespec completely ignores leap seconds, so we need to adjust for them
+        let mut tm = timespec.local();
+        assert_eq!(tm.tm_nsec, 0);
+        tm.tm_nsec = utc.nanosecond() as i32;
+
+        tm_to_datetime(tm)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Local;
+    use offset::TimeZone;
+    use Datelike;
+
+    #[test]
+    fn test_local_date_sanity_check() {
+        // issue #27
+        assert_eq!(Local.ymd(2999, 12, 28).day(), 28);
+    }
+
+    #[test]
+    fn test_leap_second() {
+        // issue #123
+        let today = Local::today();
+
+        let dt = today.and_hms_milli(1, 2, 59, 1000);
+        let timestr = dt.time().to_string();
+        // the OS API may or may not support the leap second,
+        // but there are only two sensible options.
+        assert!(timestr == "01:02:60" || timestr == "01:03:00", "unexpected timestr {:?}", timestr);
+
+        let dt = today.and_hms_milli(1, 2, 3, 1234);
+        let timestr = dt.time().to_string();
+        assert!(
+            timestr == "01:02:03.234" || timestr == "01:02:04.234",
+            "unexpected timestr {:?}",
+            timestr
+        );
+    }
+}
diff --git a/vendor/chrono/src/offset/mod.rs b/vendor/chrono/src/offset/mod.rs
new file mode 100644
index 000000000..0da6bfb42
--- /dev/null
+++ b/vendor/chrono/src/offset/mod.rs
@@ -0,0 +1,531 @@
+// This is a part of Chrono.
+// See README.md and LICENSE.txt for details.
+
+//! 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.
+
+use core::fmt;
+
+use format::{parse, ParseResult, Parsed, StrftimeItems};
+use naive::{NaiveDate, NaiveDateTime, NaiveTime};
+use Weekday;
+use {Date, DateTime};
+
+/// The conversion result from the local time to the timezone-aware datetime types.
+#[derive(Clone, PartialEq, Debug, Copy, Eq, Hash)]
+pub enum LocalResult<T> {
+    /// Given local time representation is invalid.
+    /// This can occur when, for example, the positive timezone transition.
+    None,
+    /// Given local time representation has a single unique result.
+    Single(T),
+    /// Given local time representation has multiple results and thus ambiguous.
+    /// This can occur when, for example, the negative timezone transition.
+    Ambiguous(T /*min*/, T /*max*/),
+}
+
+impl<T> LocalResult<T> {
+    /// Returns `Some` only when the conversion result is unique, or `None` otherwise.
+    pub fn single(self) -> Option<T> {
+        match self {
+            LocalResult::Single(t) => Some(t),
+            _ => None,
+        }
+    }
+
+    /// Returns `Some` for the earliest possible conversion result, or `None` if none.
+    pub fn earliest(self) -> Option<T> {
+        match self {
+            LocalResult::Single(t) | LocalResult::Ambiguous(t, _) => Some(t),
+            _ => None,
+        }
+    }
+
+    /// Returns `Some` for the latest possible conversion result, or `None` if none.
+    pub fn latest(self) -> Option<T> {
+        match self {
+            LocalResult::Single(t) | LocalResult::Ambiguous(_, t) => Some(t),
+            _ => None,
+        }
+    }
+
+    /// Maps a `LocalResult<T>` into `LocalResult<U>` with given function.
+    pub fn map<U, F: FnMut(T) -> U>(self, mut f: F) -> LocalResult<U> {
+        match self {
+            LocalResult::None => LocalResult::None,
+            LocalResult::Single(v) => LocalResult::Single(f(v)),
+            LocalResult::Ambiguous(min, max) => LocalResult::Ambiguous(f(min), f(max)),
+        }
+    }
+}
+
+impl<Tz: TimeZone> LocalResult<Date<Tz>> {
+    /// 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.
+    #[inline]
+    pub fn and_time(self, time: NaiveTime) -> LocalResult<DateTime<Tz>> {
+        match self {
+            LocalResult::Single(d) => {
+                d.and_time(time).map_or(LocalResult::None, LocalResult::Single)
+            }
+            _ => LocalResult::None,
+        }
+    }
+
+    /// 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.
+    #[inline]
+    pub fn and_hms_opt(self, hour: u32, min: u32, sec: u32) -> LocalResult<DateTime<Tz>> {
+        match self {
+            LocalResult::Single(d) => {
+                d.and_hms_opt(hour, min, sec).map_or(LocalResult::None, LocalResult::Single)
+            }
+            _ => LocalResult::None,
+        }
+    }
+
+    /// 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.
+    #[inline]
+    pub fn and_hms_milli_opt(
+        self,
+        hour: u32,
+        min: u32,
+        sec: u32,
+        milli: u32,
+    ) -> LocalResult<DateTime<Tz>> {
+        match self {
+            LocalResult::Single(d) => d
+                .and_hms_milli_opt(hour, min, sec, milli)
+                .map_or(LocalResult::None, LocalResult::Single),
+            _ => LocalResult::None,
+        }
+    }
+
+    /// 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.
+    #[inline]
+    pub fn and_hms_micro_opt(
+        self,
+        hour: u32,
+        min: u32,
+        sec: u32,
+        micro: u32,
+    ) -> LocalResult<DateTime<Tz>> {
+        match self {
+            LocalResult::Single(d) => d
+                .and_hms_micro_opt(hour, min, sec, micro)
+                .map_or(LocalResult::None, LocalResult::Single),
+            _ => LocalResult::None,
+        }
+    }
+
+    /// 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.
+    #[inline]
+    pub fn and_hms_nano_opt(
+        self,
+        hour: u32,
+        min: u32,
+        sec: u32,
+        nano: u32,
+    ) -> LocalResult<DateTime<Tz>> {
+        match self {
+            LocalResult::Single(d) => d
+                .and_hms_nano_opt(hour, min, sec, nano)
+                .map_or(LocalResult::None, LocalResult::Single),
+            _ => LocalResult::None,
+        }
+    }
+}
+
+impl<T: fmt::Debug> LocalResult<T> {
+    /// Returns the single unique conversion result, or panics accordingly.
+    pub fn unwrap(self) -> T {
+        match self {
+            LocalResult::None => panic!("No such local time"),
+            LocalResult::Single(t) => t,
+            LocalResult::Ambiguous(t1, t2) => {
+                panic!("Ambiguous local time, ranging from {:?} to {:?}", t1, t2)
+            }
+        }
+    }
+}
+
+/// The offset from the local time to UTC.
+pub trait Offset: Sized + Clone + fmt::Debug {
+    /// Returns the fixed offset from UTC to the local time stored.
+    fn fix(&self) -> FixedOffset;
+}
+
+/// The time zone.
+///
+/// The methods here are the primarily constructors for [`Date`](../struct.Date.html) and
+/// [`DateTime`](../struct.DateTime.html) types.
+pub trait TimeZone: Sized + Clone {
+    /// 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`.
+    type Offset: Offset;
+
+    /// 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.
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{Utc, TimeZone};
+    ///
+    /// assert_eq!(Utc.ymd(2015, 5, 15).to_string(), "2015-05-15UTC");
+    /// ~~~~
+    fn ymd(&self, year: i32, month: u32, day: u32) -> Date<Self> {
+        self.ymd_opt(year, month, day).unwrap()
+    }
+
+    /// 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.
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{Utc, LocalResult, TimeZone};
+    ///
+    /// assert_eq!(Utc.ymd_opt(2015, 5, 15).unwrap().to_string(), "2015-05-15UTC");
+    /// assert_eq!(Utc.ymd_opt(2000, 0, 0), LocalResult::None);
+    /// ~~~~
+    fn ymd_opt(&self, year: i32, month: u32, day: u32) -> LocalResult<Date<Self>> {
+        match NaiveDate::from_ymd_opt(year, month, day) {
+            Some(d) => self.from_local_date(&d),
+            None => LocalResult::None,
+        }
+    }
+
+    /// 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.
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{Utc, TimeZone};
+    ///
+    /// assert_eq!(Utc.yo(2015, 135).to_string(), "2015-05-15UTC");
+    /// ~~~~
+    fn yo(&self, year: i32, ordinal: u32) -> Date<Self> {
+        self.yo_opt(year, ordinal).unwrap()
+    }
+
+    /// 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.
+    fn yo_opt(&self, year: i32, ordinal: u32) -> LocalResult<Date<Self>> {
+        match NaiveDate::from_yo_opt(year, ordinal) {
+            Some(d) => self.from_local_date(&d),
+            None => LocalResult::None,
+        }
+    }
+
+    /// 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.
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{Utc, Weekday, TimeZone};
+    ///
+    /// assert_eq!(Utc.isoywd(2015, 20, Weekday::Fri).to_string(), "2015-05-15UTC");
+    /// ~~~~
+    fn isoywd(&self, year: i32, week: u32, weekday: Weekday) -> Date<Self> {
+        self.isoywd_opt(year, week, weekday).unwrap()
+    }
+
+    /// 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.
+    fn isoywd_opt(&self, year: i32, week: u32, weekday: Weekday) -> LocalResult<Date<Self>> {
+        match NaiveDate::from_isoywd_opt(year, week, weekday) {
+            Some(d) => self.from_local_date(&d),
+            None => LocalResult::None,
+        }
+    }
+
+    /// 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).
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{Utc, TimeZone};
+    ///
+    /// assert_eq!(Utc.timestamp(1431648000, 0).to_string(), "2015-05-15 00:00:00 UTC");
+    /// ~~~~
+    fn timestamp(&self, secs: i64, nsecs: u32) -> DateTime<Self> {
+        self.timestamp_opt(secs, nsecs).unwrap()
+    }
+
+    /// 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`.
+    fn timestamp_opt(&self, secs: i64, nsecs: u32) -> LocalResult<DateTime<Self>> {
+        match NaiveDateTime::from_timestamp_opt(secs, nsecs) {
+            Some(dt) => LocalResult::Single(self.from_utc_datetime(&dt)),
+            None => LocalResult::None,
+        }
+    }
+
+    /// 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).
+    ///
+    /// # Example
+    ///
+    /// ~~~~
+    /// use chrono::{Utc, TimeZone};
+    ///
+    /// assert_eq!(Utc.timestamp_millis(1431648000).timestamp(), 1431648);
+    /// ~~~~
+    fn timestamp_millis(&self, millis: i64) -> DateTime<Self> {
+        self.timestamp_millis_opt(millis).unwrap()
+    }
+
+    /// 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"),
+    /// };
+    /// ~~~~
+    fn timestamp_millis_opt(&self, millis: i64) -> LocalResult<DateTime<Self>> {
+        let (mut secs, mut millis) = (millis / 1000, millis % 1000);
+        if millis < 0 {
+            secs -= 1;
+            millis += 1000;
+        }
+        self.timestamp_opt(secs, millis as u32 * 1_000_000)
+    }
+
+    /// 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);
+    /// ~~~~
+    fn timestamp_nanos(&self, nanos: i64) -> DateTime<Self> {
+        let (mut secs, mut nanos) = (nanos / 1_000_000_000, nanos % 1_000_000_000);
+        if nanos < 0 {
+            secs -= 1;
+            nanos += 1_000_000_000;
+        }
+        self.timestamp_opt(secs, nanos as u32).unwrap()
+    }
+
+    /// Parses a string with the specified format string and
+    /// returns a `DateTime` with the current offset.
+    /// See the [`format::strftime` module](../format/strftime/index.html)
+    /// on the supported escape sequences.
+    ///
+    /// If the format does not include offsets, the current offset is assumed;
+    /// otherwise the input should have a matching UTC offset.
+    ///
+    /// See also `DateTime::parse_from_str` which gives a local `DateTime`
+    /// with parsed `FixedOffset`.
+    fn datetime_from_str(&self, s: &str, fmt: &str) -> ParseResult<DateTime<Self>> {
+        let mut parsed = Parsed::new();
+        parse(&mut parsed, s, StrftimeItems::new(fmt))?;
+        parsed.to_datetime_with_timezone(self)
+    }
+
+    /// Reconstructs the time zone from the offset.
+    fn from_offset(offset: &Self::Offset) -> Self;
+
+    /// Creates the offset(s) for given local `NaiveDate` if possible.
+    fn offset_from_local_date(&self, local: &NaiveDate) -> LocalResult<Self::Offset>;
+
+    /// Creates the offset(s) for given local `NaiveDateTime` if possible.
+    fn offset_from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<Self::Offset>;
+
+    /// Converts the local `NaiveDate` to the timezone-aware `Date` if possible.
+    fn from_local_date(&self, local: &NaiveDate) -> LocalResult<Date<Self>> {
+        self.offset_from_local_date(local).map(|offset| {
+            // since FixedOffset is within +/- 1 day, the date is never affected
+            Date::from_utc(*local, offset)
+        })
+    }
+
+    /// Converts the local `NaiveDateTime` to the timezone-aware `DateTime` if possible.
+    fn from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<DateTime<Self>> {
+        self.offset_from_local_datetime(local)
+            .map(|offset| DateTime::from_utc(*local - offset.fix(), offset))
+    }
+
+    /// Creates the offset for given UTC `NaiveDate`. This cannot fail.
+    fn offset_from_utc_date(&self, utc: &NaiveDate) -> Self::Offset;
+
+    /// Creates the offset for given UTC `NaiveDateTime`. This cannot fail.
+    fn offset_from_utc_datetime(&self, utc: &NaiveDateTime) -> Self::Offset;
+
+    /// Converts the UTC `NaiveDate` to the local time.
+    /// The UTC is continuous and thus this cannot fail (but can give the duplicate local time).
+    fn from_utc_date(&self, utc: &NaiveDate) -> Date<Self> {
+        Date::from_utc(*utc, self.offset_from_utc_date(utc))
+    }
+
+    /// Converts the UTC `NaiveDateTime` to the local time.
+    /// The UTC is continuous and thus this cannot fail (but can give the duplicate local time).
+    fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Self> {
+        DateTime::from_utc(*utc, self.offset_from_utc_datetime(utc))
+    }
+}
+
+mod fixed;
+#[cfg(feature = "clock")]
+mod local;
+mod utc;
+
+pub use self::fixed::FixedOffset;
+#[cfg(feature = "clock")]
+pub use self::local::Local;
+pub use self::utc::Utc;
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_negative_millis() {
+        let dt = Utc.timestamp_millis(-1000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:59 UTC");
+        let dt = Utc.timestamp_millis(-7000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:53 UTC");
+        let dt = Utc.timestamp_millis(-7001);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:52.999 UTC");
+        let dt = Utc.timestamp_millis(-7003);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:52.997 UTC");
+        let dt = Utc.timestamp_millis(-999);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:59.001 UTC");
+        let dt = Utc.timestamp_millis(-1);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:59.999 UTC");
+        let dt = Utc.timestamp_millis(-60000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:00 UTC");
+        let dt = Utc.timestamp_millis(-3600000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:00:00 UTC");
+
+        for (millis, expected) in &[
+            (-7000, "1969-12-31 23:59:53 UTC"),
+            (-7001, "1969-12-31 23:59:52.999 UTC"),
+            (-7003, "1969-12-31 23:59:52.997 UTC"),
+        ] {
+            match Utc.timestamp_millis_opt(*millis) {
+                LocalResult::Single(dt) => {
+                    assert_eq!(dt.to_string(), *expected);
+                }
+                e => panic!("Got {:?} instead of an okay answer", e),
+            }
+        }
+    }
+
+    #[test]
+    fn test_negative_nanos() {
+        let dt = Utc.timestamp_nanos(-1_000_000_000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:59 UTC");
+        let dt = Utc.timestamp_nanos(-999_999_999);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:59.000000001 UTC");
+        let dt = Utc.timestamp_nanos(-1);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:59.999999999 UTC");
+        let dt = Utc.timestamp_nanos(-60_000_000_000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:59:00 UTC");
+        let dt = Utc.timestamp_nanos(-3_600_000_000_000);
+        assert_eq!(dt.to_string(), "1969-12-31 23:00:00 UTC");
+    }
+
+    #[test]
+    fn test_nanos_never_panics() {
+        Utc.timestamp_nanos(i64::max_value());
+        Utc.timestamp_nanos(i64::default());
+        Utc.timestamp_nanos(i64::min_value());
+    }
+}
diff --git a/vendor/chrono/src/offset/utc.rs b/vendor/chrono/src/offset/utc.rs
new file mode 100644
index 000000000..aec6667b0
--- /dev/null
+++ b/vendor/chrono/src/offset/utc.rs
@@ -0,0 +1,100 @@
+// This is a part of Chrono.
+// See README.md and LICENSE.txt for details.
+
+//! The UTC (Coordinated Universal Time) time zone.
+
+use core::fmt;
+
+use super::{FixedOffset, LocalResult, Offset, TimeZone};
+use naive::{NaiveDate, NaiveDateTime};
+#[cfg(all(
+    feature = "clock",
+    not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))
+))]
+use std::time::{SystemTime, UNIX_EPOCH};
+#[cfg(feature = "clock")]
+use {Date, DateTime};
+
+/// The UTC time zone. This is the most efficient time zone when you don't need the local time.
+/// It is also used as an offset (which is also a dummy type).
+///
+/// Using the [`TimeZone`](./trait.TimeZone.html) methods
+/// on the UTC struct is the preferred way to construct `DateTime<Utc>`
+/// instances.
+///
+/// # Example
+///
+/// ~~~~
+/// use chrono::{DateTime, TimeZone, NaiveDateTime, Utc};
+///
+/// let dt = DateTime::<Utc>::from_utc(NaiveDateTime::from_timestamp(61, 0), Utc);
+///
+/// assert_eq!(Utc.timestamp(61, 0), dt);
+/// assert_eq!(Utc.ymd(1970, 1, 1).and_hms(0, 1, 1), dt);
+/// ~~~~
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub struct Utc;
+
+#[cfg(feature = "clock")]
+impl Utc {
+    /// Returns a `Date` which corresponds to the current date.
+    pub fn today() -> Date<Utc> {
+        Utc::now().date()
+    }
+
+    /// Returns a `DateTime` which corresponds to the current date.
+    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    pub fn now() -> DateTime<Utc> {
+        let now =
+            SystemTime::now().duration_since(UNIX_EPOCH).expect("system time before Unix epoch");
+        let naive = NaiveDateTime::from_timestamp(now.as_secs() as i64, now.subsec_nanos() as u32);
+        DateTime::from_utc(naive, Utc)
+    }
+
+    /// Returns a `DateTime` which corresponds to the current date.
+    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    pub fn now() -> DateTime<Utc> {
+        let now = js_sys::Date::new_0();
+        DateTime::<Utc>::from(now)
+    }
+}
+
+impl TimeZone for Utc {
+    type Offset = Utc;
+
+    fn from_offset(_state: &Utc) -> Utc {
+        Utc
+    }
+
+    fn offset_from_local_date(&self, _local: &NaiveDate) -> LocalResult<Utc> {
+        LocalResult::Single(Utc)
+    }
+    fn offset_from_local_datetime(&self, _local: &NaiveDateTime) -> LocalResult<Utc> {
+        LocalResult::Single(Utc)
+    }
+
+    fn offset_from_utc_date(&self, _utc: &NaiveDate) -> Utc {
+        Utc
+    }
+    fn offset_from_utc_datetime(&self, _utc: &NaiveDateTime) -> Utc {
+        Utc
+    }
+}
+
+impl Offset for Utc {
+    fn fix(&self) -> FixedOffset {
+        FixedOffset::east(0)
+    }
+}
+
+impl fmt::Debug for Utc {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Z")
+    }
+}
+
+impl fmt::Display for Utc {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "UTC")
+    }
+}