Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 244 insertions, 0 deletions

diff --git a/third_party/rust/chrono/src/offset/fixed.rs b/third_party/rust/chrono/src/offset/fixed.rs
new file mode 100644
index 0000000000..83f42a1a41
--- /dev/null
+++ b/third_party/rust/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()
+        );
+    }
+}