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

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

1 files changed, 456 insertions, 0 deletions

diff --git a/vendor/chrono/src/round.rs b/vendor/chrono/src/round.rs
new file mode 100644
index 000000000..92d7c3a50
--- /dev/null
+++ b/vendor/chrono/src/round.rs
@@ -0,0 +1,456 @@
+// This is a part of Chrono.
+// See README.md and LICENSE.txt for details.
+
+use core::cmp::Ordering;
+use core::fmt;
+use core::marker::Sized;
+use core::ops::{Add, Sub};
+use datetime::DateTime;
+use oldtime::Duration;
+#[cfg(any(feature = "std", test))]
+use std;
+use TimeZone;
+use Timelike;
+
+/// Extension trait for subsecond rounding or truncation to a maximum number
+/// of digits. Rounding can be used to decrease the error variance when
+/// serializing/persisting to lower precision. Truncation is the default
+/// behavior in Chrono display formatting.  Either can be used to guarantee
+/// equality (e.g. for testing) when round-tripping through a lower precision
+/// format.
+pub trait SubsecRound {
+    /// Return a copy rounded to the specified number of subsecond digits. With
+    /// 9 or more digits, self is returned unmodified. Halfway values are
+    /// rounded up (away from zero).
+    ///
+    /// # Example
+    /// ``` rust
+    /// # use chrono::{DateTime, SubsecRound, Timelike, TimeZone, Utc};
+    /// let dt = Utc.ymd(2018, 1, 11).and_hms_milli(12, 0, 0, 154);
+    /// assert_eq!(dt.round_subsecs(2).nanosecond(), 150_000_000);
+    /// assert_eq!(dt.round_subsecs(1).nanosecond(), 200_000_000);
+    /// ```
+    fn round_subsecs(self, digits: u16) -> Self;
+
+    /// Return a copy truncated to the specified number of subsecond
+    /// digits. With 9 or more digits, self is returned unmodified.
+    ///
+    /// # Example
+    /// ``` rust
+    /// # use chrono::{DateTime, SubsecRound, Timelike, TimeZone, Utc};
+    /// let dt = Utc.ymd(2018, 1, 11).and_hms_milli(12, 0, 0, 154);
+    /// assert_eq!(dt.trunc_subsecs(2).nanosecond(), 150_000_000);
+    /// assert_eq!(dt.trunc_subsecs(1).nanosecond(), 100_000_000);
+    /// ```
+    fn trunc_subsecs(self, digits: u16) -> Self;
+}
+
+impl<T> SubsecRound for T
+where
+    T: Timelike + Add<Duration, Output = T> + Sub<Duration, Output = T>,
+{
+    fn round_subsecs(self, digits: u16) -> T {
+        let span = span_for_digits(digits);
+        let delta_down = self.nanosecond() % span;
+        if delta_down > 0 {
+            let delta_up = span - delta_down;
+            if delta_up <= delta_down {
+                self + Duration::nanoseconds(delta_up.into())
+            } else {
+                self - Duration::nanoseconds(delta_down.into())
+            }
+        } else {
+            self // unchanged
+        }
+    }
+
+    fn trunc_subsecs(self, digits: u16) -> T {
+        let span = span_for_digits(digits);
+        let delta_down = self.nanosecond() % span;
+        if delta_down > 0 {
+            self - Duration::nanoseconds(delta_down.into())
+        } else {
+            self // unchanged
+        }
+    }
+}
+
+// Return the maximum span in nanoseconds for the target number of digits.
+fn span_for_digits(digits: u16) -> u32 {
+    // fast lookup form of: 10^(9-min(9,digits))
+    match digits {
+        0 => 1_000_000_000,
+        1 => 100_000_000,
+        2 => 10_000_000,
+        3 => 1_000_000,
+        4 => 100_000,
+        5 => 10_000,
+        6 => 1_000,
+        7 => 100,
+        8 => 10,
+        _ => 1,
+    }
+}
+
+/// Extension trait for rounding or truncating a DateTime by a Duration.
+///
+/// # Limitations
+/// Both rounding and truncating are done via [`Duration::num_nanoseconds`] and
+/// [`DateTime::timestamp_nanos`]. This means that they will fail if either the
+/// `Duration` or the `DateTime` are too big to represented as nanoseconds. They
+/// will also fail if the `Duration` is bigger than the timestamp.
+pub trait DurationRound: Sized {
+    /// Error that can occur in rounding or truncating
+    #[cfg(any(feature = "std", test))]
+    type Err: std::error::Error;
+
+    /// Error that can occur in rounding or truncating
+    #[cfg(not(any(feature = "std", test)))]
+    type Err: fmt::Debug + fmt::Display;
+
+    /// Return a copy rounded by Duration.
+    ///
+    /// # Example
+    /// ``` rust
+    /// # use chrono::{DateTime, DurationRound, Duration, TimeZone, Utc};
+    /// let dt = Utc.ymd(2018, 1, 11).and_hms_milli(12, 0, 0, 154);
+    /// assert_eq!(
+    ///     dt.duration_round(Duration::milliseconds(10)).unwrap().to_string(),
+    ///     "2018-01-11 12:00:00.150 UTC"
+    /// );
+    /// assert_eq!(
+    ///     dt.duration_round(Duration::days(1)).unwrap().to_string(),
+    ///     "2018-01-12 00:00:00 UTC"
+    /// );
+    /// ```
+    fn duration_round(self, duration: Duration) -> Result<Self, Self::Err>;
+
+    /// Return a copy truncated by Duration.
+    ///
+    /// # Example
+    /// ``` rust
+    /// # use chrono::{DateTime, DurationRound, Duration, TimeZone, Utc};
+    /// let dt = Utc.ymd(2018, 1, 11).and_hms_milli(12, 0, 0, 154);
+    /// assert_eq!(
+    ///     dt.duration_trunc(Duration::milliseconds(10)).unwrap().to_string(),
+    ///     "2018-01-11 12:00:00.150 UTC"
+    /// );
+    /// assert_eq!(
+    ///     dt.duration_trunc(Duration::days(1)).unwrap().to_string(),
+    ///     "2018-01-11 00:00:00 UTC"
+    /// );
+    /// ```
+    fn duration_trunc(self, duration: Duration) -> Result<Self, Self::Err>;
+}
+
+/// The maximum number of seconds a DateTime can be to be represented as nanoseconds
+const MAX_SECONDS_TIMESTAMP_FOR_NANOS: i64 = 9_223_372_036;
+
+impl<Tz: TimeZone> DurationRound for DateTime<Tz> {
+    type Err = RoundingError;
+
+    fn duration_round(self, duration: Duration) -> Result<Self, Self::Err> {
+        if let Some(span) = duration.num_nanoseconds() {
+            if self.timestamp().abs() > MAX_SECONDS_TIMESTAMP_FOR_NANOS {
+                return Err(RoundingError::TimestampExceedsLimit);
+            }
+            let stamp = self.timestamp_nanos();
+            if span > stamp.abs() {
+                return Err(RoundingError::DurationExceedsTimestamp);
+            }
+            let delta_down = stamp % span;
+            if delta_down == 0 {
+                Ok(self)
+            } else {
+                let (delta_up, delta_down) = if delta_down < 0 {
+                    (delta_down.abs(), span - delta_down.abs())
+                } else {
+                    (span - delta_down, delta_down)
+                };
+                if delta_up <= delta_down {
+                    Ok(self + Duration::nanoseconds(delta_up))
+                } else {
+                    Ok(self - Duration::nanoseconds(delta_down))
+                }
+            }
+        } else {
+            Err(RoundingError::DurationExceedsLimit)
+        }
+    }
+
+    fn duration_trunc(self, duration: Duration) -> Result<Self, Self::Err> {
+        if let Some(span) = duration.num_nanoseconds() {
+            if self.timestamp().abs() > MAX_SECONDS_TIMESTAMP_FOR_NANOS {
+                return Err(RoundingError::TimestampExceedsLimit);
+            }
+            let stamp = self.timestamp_nanos();
+            if span > stamp.abs() {
+                return Err(RoundingError::DurationExceedsTimestamp);
+            }
+            let delta_down = stamp % span;
+            match delta_down.cmp(&0) {
+                Ordering::Equal => Ok(self),
+                Ordering::Greater => Ok(self - Duration::nanoseconds(delta_down)),
+                Ordering::Less => Ok(self - Duration::nanoseconds(span - delta_down.abs())),
+            }
+        } else {
+            Err(RoundingError::DurationExceedsLimit)
+        }
+    }
+}
+
+/// An error from rounding by `Duration`
+///
+/// See: [`DurationRound`]
+#[derive(Debug, Clone, PartialEq, Eq, Copy)]
+pub enum RoundingError {
+    /// Error when the Duration exceeds the Duration from or until the Unix epoch.
+    ///
+    /// ``` rust
+    /// # use chrono::{DateTime, DurationRound, Duration, RoundingError, TimeZone, Utc};
+    /// let dt = Utc.ymd(1970, 12, 12).and_hms(0, 0, 0);
+    ///
+    /// assert_eq!(
+    ///     dt.duration_round(Duration::days(365)),
+    ///     Err(RoundingError::DurationExceedsTimestamp),
+    /// );
+    /// ```
+    DurationExceedsTimestamp,
+
+    /// Error when `Duration.num_nanoseconds` exceeds the limit.
+    ///
+    /// ``` rust
+    /// # use chrono::{DateTime, DurationRound, Duration, RoundingError, TimeZone, Utc};
+    /// let dt = Utc.ymd(2260, 12, 31).and_hms_nano(23, 59, 59, 1_75_500_000);
+    ///
+    /// assert_eq!(
+    ///     dt.duration_round(Duration::days(300 * 365)),
+    ///     Err(RoundingError::DurationExceedsLimit)
+    /// );
+    /// ```
+    DurationExceedsLimit,
+
+    /// Error when `DateTime.timestamp_nanos` exceeds the limit.
+    ///
+    /// ``` rust
+    /// # use chrono::{DateTime, DurationRound, Duration, RoundingError, TimeZone, Utc};
+    /// let dt = Utc.ymd(2300, 12, 12).and_hms(0, 0, 0);
+    ///
+    /// assert_eq!(dt.duration_round(Duration::days(1)), Err(RoundingError::TimestampExceedsLimit),);
+    /// ```
+    TimestampExceedsLimit,
+}
+
+impl fmt::Display for RoundingError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            RoundingError::DurationExceedsTimestamp => {
+                write!(f, "duration in nanoseconds exceeds timestamp")
+            }
+            RoundingError::DurationExceedsLimit => {
+                write!(f, "duration exceeds num_nanoseconds limit")
+            }
+            RoundingError::TimestampExceedsLimit => {
+                write!(f, "timestamp exceeds num_nanoseconds limit")
+            }
+        }
+    }
+}
+
+#[cfg(any(feature = "std", test))]
+impl std::error::Error for RoundingError {
+    #[allow(deprecated)]
+    fn description(&self) -> &str {
+        "error from rounding or truncating with DurationRound"
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{Duration, DurationRound, SubsecRound};
+    use offset::{FixedOffset, TimeZone, Utc};
+    use Timelike;
+
+    #[test]
+    fn test_round_subsecs() {
+        let pst = FixedOffset::east(8 * 60 * 60);
+        let dt = pst.ymd(2018, 1, 11).and_hms_nano(10, 5, 13, 084_660_684);
+
+        assert_eq!(dt.round_subsecs(10), dt);
+        assert_eq!(dt.round_subsecs(9), dt);
+        assert_eq!(dt.round_subsecs(8).nanosecond(), 084_660_680);
+        assert_eq!(dt.round_subsecs(7).nanosecond(), 084_660_700);
+        assert_eq!(dt.round_subsecs(6).nanosecond(), 084_661_000);
+        assert_eq!(dt.round_subsecs(5).nanosecond(), 084_660_000);
+        assert_eq!(dt.round_subsecs(4).nanosecond(), 084_700_000);
+        assert_eq!(dt.round_subsecs(3).nanosecond(), 085_000_000);
+        assert_eq!(dt.round_subsecs(2).nanosecond(), 080_000_000);
+        assert_eq!(dt.round_subsecs(1).nanosecond(), 100_000_000);
+
+        assert_eq!(dt.round_subsecs(0).nanosecond(), 0);
+        assert_eq!(dt.round_subsecs(0).second(), 13);
+
+        let dt = Utc.ymd(2018, 1, 11).and_hms_nano(10, 5, 27, 750_500_000);
+        assert_eq!(dt.round_subsecs(9), dt);
+        assert_eq!(dt.round_subsecs(4), dt);
+        assert_eq!(dt.round_subsecs(3).nanosecond(), 751_000_000);
+        assert_eq!(dt.round_subsecs(2).nanosecond(), 750_000_000);
+        assert_eq!(dt.round_subsecs(1).nanosecond(), 800_000_000);
+
+        assert_eq!(dt.round_subsecs(0).nanosecond(), 0);
+        assert_eq!(dt.round_subsecs(0).second(), 28);
+    }
+
+    #[test]
+    fn test_round_leap_nanos() {
+        let dt = Utc.ymd(2016, 12, 31).and_hms_nano(23, 59, 59, 1_750_500_000);
+        assert_eq!(dt.round_subsecs(9), dt);
+        assert_eq!(dt.round_subsecs(4), dt);
+        assert_eq!(dt.round_subsecs(2).nanosecond(), 1_750_000_000);
+        assert_eq!(dt.round_subsecs(1).nanosecond(), 1_800_000_000);
+        assert_eq!(dt.round_subsecs(1).second(), 59);
+
+        assert_eq!(dt.round_subsecs(0).nanosecond(), 0);
+        assert_eq!(dt.round_subsecs(0).second(), 0);
+    }
+
+    #[test]
+    fn test_trunc_subsecs() {
+        let pst = FixedOffset::east(8 * 60 * 60);
+        let dt = pst.ymd(2018, 1, 11).and_hms_nano(10, 5, 13, 084_660_684);
+
+        assert_eq!(dt.trunc_subsecs(10), dt);
+        assert_eq!(dt.trunc_subsecs(9), dt);
+        assert_eq!(dt.trunc_subsecs(8).nanosecond(), 084_660_680);
+        assert_eq!(dt.trunc_subsecs(7).nanosecond(), 084_660_600);
+        assert_eq!(dt.trunc_subsecs(6).nanosecond(), 084_660_000);
+        assert_eq!(dt.trunc_subsecs(5).nanosecond(), 084_660_000);
+        assert_eq!(dt.trunc_subsecs(4).nanosecond(), 084_600_000);
+        assert_eq!(dt.trunc_subsecs(3).nanosecond(), 084_000_000);
+        assert_eq!(dt.trunc_subsecs(2).nanosecond(), 080_000_000);
+        assert_eq!(dt.trunc_subsecs(1).nanosecond(), 0);
+
+        assert_eq!(dt.trunc_subsecs(0).nanosecond(), 0);
+        assert_eq!(dt.trunc_subsecs(0).second(), 13);
+
+        let dt = pst.ymd(2018, 1, 11).and_hms_nano(10, 5, 27, 750_500_000);
+        assert_eq!(dt.trunc_subsecs(9), dt);
+        assert_eq!(dt.trunc_subsecs(4), dt);
+        assert_eq!(dt.trunc_subsecs(3).nanosecond(), 750_000_000);
+        assert_eq!(dt.trunc_subsecs(2).nanosecond(), 750_000_000);
+        assert_eq!(dt.trunc_subsecs(1).nanosecond(), 700_000_000);
+
+        assert_eq!(dt.trunc_subsecs(0).nanosecond(), 0);
+        assert_eq!(dt.trunc_subsecs(0).second(), 27);
+    }
+
+    #[test]
+    fn test_trunc_leap_nanos() {
+        let dt = Utc.ymd(2016, 12, 31).and_hms_nano(23, 59, 59, 1_750_500_000);
+        assert_eq!(dt.trunc_subsecs(9), dt);
+        assert_eq!(dt.trunc_subsecs(4), dt);
+        assert_eq!(dt.trunc_subsecs(2).nanosecond(), 1_750_000_000);
+        assert_eq!(dt.trunc_subsecs(1).nanosecond(), 1_700_000_000);
+        assert_eq!(dt.trunc_subsecs(1).second(), 59);
+
+        assert_eq!(dt.trunc_subsecs(0).nanosecond(), 1_000_000_000);
+        assert_eq!(dt.trunc_subsecs(0).second(), 59);
+    }
+
+    #[test]
+    fn test_duration_round() {
+        let dt = Utc.ymd(2016, 12, 31).and_hms_nano(23, 59, 59, 175_500_000);
+
+        assert_eq!(
+            dt.duration_round(Duration::milliseconds(10)).unwrap().to_string(),
+            "2016-12-31 23:59:59.180 UTC"
+        );
+
+        // round up
+        let dt = Utc.ymd(2012, 12, 12).and_hms_milli(18, 22, 30, 0);
+        assert_eq!(
+            dt.duration_round(Duration::minutes(5)).unwrap().to_string(),
+            "2012-12-12 18:25:00 UTC"
+        );
+        // round down
+        let dt = Utc.ymd(2012, 12, 12).and_hms_milli(18, 22, 29, 999);
+        assert_eq!(
+            dt.duration_round(Duration::minutes(5)).unwrap().to_string(),
+            "2012-12-12 18:20:00 UTC"
+        );
+
+        assert_eq!(
+            dt.duration_round(Duration::minutes(10)).unwrap().to_string(),
+            "2012-12-12 18:20:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_round(Duration::minutes(30)).unwrap().to_string(),
+            "2012-12-12 18:30:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_round(Duration::hours(1)).unwrap().to_string(),
+            "2012-12-12 18:00:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_round(Duration::days(1)).unwrap().to_string(),
+            "2012-12-13 00:00:00 UTC"
+        );
+    }
+
+    #[test]
+    fn test_duration_round_pre_epoch() {
+        let dt = Utc.ymd(1969, 12, 12).and_hms(12, 12, 12);
+        assert_eq!(
+            dt.duration_round(Duration::minutes(10)).unwrap().to_string(),
+            "1969-12-12 12:10:00 UTC"
+        );
+    }
+
+    #[test]
+    fn test_duration_trunc() {
+        let dt = Utc.ymd(2016, 12, 31).and_hms_nano(23, 59, 59, 1_75_500_000);
+
+        assert_eq!(
+            dt.duration_trunc(Duration::milliseconds(10)).unwrap().to_string(),
+            "2016-12-31 23:59:59.170 UTC"
+        );
+
+        // would round up
+        let dt = Utc.ymd(2012, 12, 12).and_hms_milli(18, 22, 30, 0);
+        assert_eq!(
+            dt.duration_trunc(Duration::minutes(5)).unwrap().to_string(),
+            "2012-12-12 18:20:00 UTC"
+        );
+        // would round down
+        let dt = Utc.ymd(2012, 12, 12).and_hms_milli(18, 22, 29, 999);
+        assert_eq!(
+            dt.duration_trunc(Duration::minutes(5)).unwrap().to_string(),
+            "2012-12-12 18:20:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_trunc(Duration::minutes(10)).unwrap().to_string(),
+            "2012-12-12 18:20:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_trunc(Duration::minutes(30)).unwrap().to_string(),
+            "2012-12-12 18:00:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_trunc(Duration::hours(1)).unwrap().to_string(),
+            "2012-12-12 18:00:00 UTC"
+        );
+        assert_eq!(
+            dt.duration_trunc(Duration::days(1)).unwrap().to_string(),
+            "2012-12-12 00:00:00 UTC"
+        );
+    }
+
+    #[test]
+    fn test_duration_trunc_pre_epoch() {
+        let dt = Utc.ymd(1969, 12, 12).and_hms(12, 12, 12);
+        assert_eq!(
+            dt.duration_trunc(Duration::minutes(10)).unwrap().to_string(),
+            "1969-12-12 12:10:00 UTC"
+        );
+    }
+}