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+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Temporal quantification
+
+use core::ops::{Add, Div, Mul, Neg, Sub};
+use core::time::Duration as StdDuration;
+use core::{fmt, i64};
+#[cfg(any(feature = "std", test))]
+use std::error::Error;
+
+/// The number of nanoseconds in a microsecond.
+const NANOS_PER_MICRO: i32 = 1000;
+/// The number of nanoseconds in a millisecond.
+const NANOS_PER_MILLI: i32 = 1000_000;
+/// The number of nanoseconds in seconds.
+const NANOS_PER_SEC: i32 = 1_000_000_000;
+/// The number of microseconds per second.
+const MICROS_PER_SEC: i64 = 1000_000;
+/// The number of milliseconds per second.
+const MILLIS_PER_SEC: i64 = 1000;
+/// The number of seconds in a minute.
+const SECS_PER_MINUTE: i64 = 60;
+/// The number of seconds in an hour.
+const SECS_PER_HOUR: i64 = 3600;
+/// The number of (non-leap) seconds in days.
+const SECS_PER_DAY: i64 = 86400;
+/// The number of (non-leap) seconds in a week.
+const SECS_PER_WEEK: i64 = 604800;
+
+macro_rules! try_opt {
+ ($e:expr) => {
+ match $e {
+ Some(v) => v,
+ None => return None,
+ }
+ };
+}
+
+/// ISO 8601 time duration with nanosecond precision.
+/// This also allows for the negative duration; see individual methods for details.
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug)]
+pub struct Duration {
+ secs: i64,
+ nanos: i32, // Always 0 <= nanos < NANOS_PER_SEC
+}
+
+/// The minimum possible `Duration`: `i64::MIN` milliseconds.
+pub const MIN: Duration = Duration {
+ secs: i64::MIN / MILLIS_PER_SEC - 1,
+ nanos: NANOS_PER_SEC + (i64::MIN % MILLIS_PER_SEC) as i32 * NANOS_PER_MILLI,
+};
+
+/// The maximum possible `Duration`: `i64::MAX` milliseconds.
+pub const MAX: Duration = Duration {
+ secs: i64::MAX / MILLIS_PER_SEC,
+ nanos: (i64::MAX % MILLIS_PER_SEC) as i32 * NANOS_PER_MILLI,
+};
+
+impl Duration {
+ /// Makes a new `Duration` with given number of weeks.
+ /// Equivalent to `Duration::seconds(weeks * 7 * 24 * 60 * 60)` with overflow checks.
+ /// Panics when the duration is out of bounds.
+ #[inline]
+ pub fn weeks(weeks: i64) -> Duration {
+ let secs = weeks.checked_mul(SECS_PER_WEEK).expect("Duration::weeks out of bounds");
+ Duration::seconds(secs)
+ }
+
+ /// Makes a new `Duration` with given number of days.
+ /// Equivalent to `Duration::seconds(days * 24 * 60 * 60)` with overflow checks.
+ /// Panics when the duration is out of bounds.
+ #[inline]
+ pub fn days(days: i64) -> Duration {
+ let secs = days.checked_mul(SECS_PER_DAY).expect("Duration::days out of bounds");
+ Duration::seconds(secs)
+ }
+
+ /// Makes a new `Duration` with given number of hours.
+ /// Equivalent to `Duration::seconds(hours * 60 * 60)` with overflow checks.
+ /// Panics when the duration is out of bounds.
+ #[inline]
+ pub fn hours(hours: i64) -> Duration {
+ let secs = hours.checked_mul(SECS_PER_HOUR).expect("Duration::hours ouf of bounds");
+ Duration::seconds(secs)
+ }
+
+ /// Makes a new `Duration` with given number of minutes.
+ /// Equivalent to `Duration::seconds(minutes * 60)` with overflow checks.
+ /// Panics when the duration is out of bounds.
+ #[inline]
+ pub fn minutes(minutes: i64) -> Duration {
+ let secs = minutes.checked_mul(SECS_PER_MINUTE).expect("Duration::minutes out of bounds");
+ Duration::seconds(secs)
+ }
+
+ /// Makes a new `Duration` with given number of seconds.
+ /// Panics when the duration is more than `i64::MAX` seconds
+ /// or less than `i64::MIN` seconds.
+ #[inline]
+ pub fn seconds(seconds: i64) -> Duration {
+ let d = Duration { secs: seconds, nanos: 0 };
+ if d < MIN || d > MAX {
+ panic!("Duration::seconds out of bounds");
+ }
+ d
+ }
+
+ /// Makes a new `Duration` with given number of milliseconds.
+ #[inline]
+ pub fn milliseconds(milliseconds: i64) -> Duration {
+ let (secs, millis) = div_mod_floor_64(milliseconds, MILLIS_PER_SEC);
+ let nanos = millis as i32 * NANOS_PER_MILLI;
+ Duration { secs: secs, nanos: nanos }
+ }
+
+ /// Makes a new `Duration` with given number of microseconds.
+ #[inline]
+ pub fn microseconds(microseconds: i64) -> Duration {
+ let (secs, micros) = div_mod_floor_64(microseconds, MICROS_PER_SEC);
+ let nanos = micros as i32 * NANOS_PER_MICRO;
+ Duration { secs: secs, nanos: nanos }
+ }
+
+ /// Makes a new `Duration` with given number of nanoseconds.
+ #[inline]
+ pub fn nanoseconds(nanos: i64) -> Duration {
+ let (secs, nanos) = div_mod_floor_64(nanos, NANOS_PER_SEC as i64);
+ Duration { secs: secs, nanos: nanos as i32 }
+ }
+
+ /// Returns the total number of whole weeks in the duration.
+ #[inline]
+ pub fn num_weeks(&self) -> i64 {
+ self.num_days() / 7
+ }
+
+ /// Returns the total number of whole days in the duration.
+ pub fn num_days(&self) -> i64 {
+ self.num_seconds() / SECS_PER_DAY
+ }
+
+ /// Returns the total number of whole hours in the duration.
+ #[inline]
+ pub fn num_hours(&self) -> i64 {
+ self.num_seconds() / SECS_PER_HOUR
+ }
+
+ /// Returns the total number of whole minutes in the duration.
+ #[inline]
+ pub fn num_minutes(&self) -> i64 {
+ self.num_seconds() / SECS_PER_MINUTE
+ }
+
+ /// Returns the total number of whole seconds in the duration.
+ pub fn num_seconds(&self) -> i64 {
+ // If secs is negative, nanos should be subtracted from the duration.
+ if self.secs < 0 && self.nanos > 0 {
+ self.secs + 1
+ } else {
+ self.secs
+ }
+ }
+
+ /// Returns the number of nanoseconds such that
+ /// `nanos_mod_sec() + num_seconds() * NANOS_PER_SEC` is the total number of
+ /// nanoseconds in the duration.
+ fn nanos_mod_sec(&self) -> i32 {
+ if self.secs < 0 && self.nanos > 0 {
+ self.nanos - NANOS_PER_SEC
+ } else {
+ self.nanos
+ }
+ }
+
+ /// Returns the total number of whole milliseconds in the duration,
+ pub fn num_milliseconds(&self) -> i64 {
+ // A proper Duration will not overflow, because MIN and MAX are defined
+ // such that the range is exactly i64 milliseconds.
+ let secs_part = self.num_seconds() * MILLIS_PER_SEC;
+ let nanos_part = self.nanos_mod_sec() / NANOS_PER_MILLI;
+ secs_part + nanos_part as i64
+ }
+
+ /// Returns the total number of whole microseconds in the duration,
+ /// or `None` on overflow (exceeding 2^63 microseconds in either direction).
+ pub fn num_microseconds(&self) -> Option<i64> {
+ let secs_part = try_opt!(self.num_seconds().checked_mul(MICROS_PER_SEC));
+ let nanos_part = self.nanos_mod_sec() / NANOS_PER_MICRO;
+ secs_part.checked_add(nanos_part as i64)
+ }
+
+ /// Returns the total number of whole nanoseconds in the duration,
+ /// or `None` on overflow (exceeding 2^63 nanoseconds in either direction).
+ pub fn num_nanoseconds(&self) -> Option<i64> {
+ let secs_part = try_opt!(self.num_seconds().checked_mul(NANOS_PER_SEC as i64));
+ let nanos_part = self.nanos_mod_sec();
+ secs_part.checked_add(nanos_part as i64)
+ }
+
+ /// Add two durations, returning `None` if overflow occurred.
+ pub fn checked_add(&self, rhs: &Duration) -> Option<Duration> {
+ let mut secs = try_opt!(self.secs.checked_add(rhs.secs));
+ let mut nanos = self.nanos + rhs.nanos;
+ if nanos >= NANOS_PER_SEC {
+ nanos -= NANOS_PER_SEC;
+ secs = try_opt!(secs.checked_add(1));
+ }
+ let d = Duration { secs: secs, nanos: nanos };
+ // Even if d is within the bounds of i64 seconds,
+ // it might still overflow i64 milliseconds.
+ if d < MIN || d > MAX {
+ None
+ } else {
+ Some(d)
+ }
+ }
+
+ /// Subtract two durations, returning `None` if overflow occurred.
+ pub fn checked_sub(&self, rhs: &Duration) -> Option<Duration> {
+ let mut secs = try_opt!(self.secs.checked_sub(rhs.secs));
+ let mut nanos = self.nanos - rhs.nanos;
+ if nanos < 0 {
+ nanos += NANOS_PER_SEC;
+ secs = try_opt!(secs.checked_sub(1));
+ }
+ let d = Duration { secs: secs, nanos: nanos };
+ // Even if d is within the bounds of i64 seconds,
+ // it might still overflow i64 milliseconds.
+ if d < MIN || d > MAX {
+ None
+ } else {
+ Some(d)
+ }
+ }
+
+ /// Returns the duration as an absolute (non-negative) value.
+ #[inline]
+ pub fn abs(&self) -> Duration {
+ Duration { secs: self.secs.abs(), nanos: self.nanos }
+ }
+
+ /// The minimum possible `Duration`: `i64::MIN` milliseconds.
+ #[inline]
+ pub fn min_value() -> Duration {
+ MIN
+ }
+
+ /// The maximum possible `Duration`: `i64::MAX` milliseconds.
+ #[inline]
+ pub fn max_value() -> Duration {
+ MAX
+ }
+
+ /// A duration where the stored seconds and nanoseconds are equal to zero.
+ #[inline]
+ pub fn zero() -> Duration {
+ Duration { secs: 0, nanos: 0 }
+ }
+
+ /// Returns `true` if the duration equals `Duration::zero()`.
+ #[inline]
+ pub fn is_zero(&self) -> bool {
+ self.secs == 0 && self.nanos == 0
+ }
+
+ /// Creates a `time::Duration` object from `std::time::Duration`
+ ///
+ /// This function errors when original duration is larger than the maximum
+ /// value supported for this type.
+ pub fn from_std(duration: StdDuration) -> Result<Duration, OutOfRangeError> {
+ // We need to check secs as u64 before coercing to i64
+ if duration.as_secs() > MAX.secs as u64 {
+ return Err(OutOfRangeError(()));
+ }
+ let d = Duration { secs: duration.as_secs() as i64, nanos: duration.subsec_nanos() as i32 };
+ if d > MAX {
+ return Err(OutOfRangeError(()));
+ }
+ Ok(d)
+ }
+
+ /// Creates a `std::time::Duration` object from `time::Duration`
+ ///
+ /// This function errors when duration is less than zero. As standard
+ /// library implementation is limited to non-negative values.
+ pub fn to_std(&self) -> Result<StdDuration, OutOfRangeError> {
+ if self.secs < 0 {
+ return Err(OutOfRangeError(()));
+ }
+ Ok(StdDuration::new(self.secs as u64, self.nanos as u32))
+ }
+}
+
+impl Neg for Duration {
+ type Output = Duration;
+
+ #[inline]
+ fn neg(self) -> Duration {
+ if self.nanos == 0 {
+ Duration { secs: -self.secs, nanos: 0 }
+ } else {
+ Duration { secs: -self.secs - 1, nanos: NANOS_PER_SEC - self.nanos }
+ }
+ }
+}
+
+impl Add for Duration {
+ type Output = Duration;
+
+ fn add(self, rhs: Duration) -> Duration {
+ let mut secs = self.secs + rhs.secs;
+ let mut nanos = self.nanos + rhs.nanos;
+ if nanos >= NANOS_PER_SEC {
+ nanos -= NANOS_PER_SEC;
+ secs += 1;
+ }
+ Duration { secs: secs, nanos: nanos }
+ }
+}
+
+impl Sub for Duration {
+ type Output = Duration;
+
+ fn sub(self, rhs: Duration) -> Duration {
+ let mut secs = self.secs - rhs.secs;
+ let mut nanos = self.nanos - rhs.nanos;
+ if nanos < 0 {
+ nanos += NANOS_PER_SEC;
+ secs -= 1;
+ }
+ Duration { secs: secs, nanos: nanos }
+ }
+}
+
+impl Mul<i32> for Duration {
+ type Output = Duration;
+
+ fn mul(self, rhs: i32) -> Duration {
+ // Multiply nanoseconds as i64, because it cannot overflow that way.
+ let total_nanos = self.nanos as i64 * rhs as i64;
+ let (extra_secs, nanos) = div_mod_floor_64(total_nanos, NANOS_PER_SEC as i64);
+ let secs = self.secs * rhs as i64 + extra_secs;
+ Duration { secs: secs, nanos: nanos as i32 }
+ }
+}
+
+impl Div<i32> for Duration {
+ type Output = Duration;
+
+ fn div(self, rhs: i32) -> Duration {
+ let mut secs = self.secs / rhs as i64;
+ let carry = self.secs - secs * rhs as i64;
+ let extra_nanos = carry * NANOS_PER_SEC as i64 / rhs as i64;
+ let mut nanos = self.nanos / rhs + extra_nanos as i32;
+ if nanos >= NANOS_PER_SEC {
+ nanos -= NANOS_PER_SEC;
+ secs += 1;
+ }
+ if nanos < 0 {
+ nanos += NANOS_PER_SEC;
+ secs -= 1;
+ }
+ Duration { secs: secs, nanos: nanos }
+ }
+}
+
+impl fmt::Display for Duration {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ // technically speaking, negative duration is not valid ISO 8601,
+ // but we need to print it anyway.
+ let (abs, sign) = if self.secs < 0 { (-*self, "-") } else { (*self, "") };
+
+ let days = abs.secs / SECS_PER_DAY;
+ let secs = abs.secs - days * SECS_PER_DAY;
+ let hasdate = days != 0;
+ let hastime = (secs != 0 || abs.nanos != 0) || !hasdate;
+
+ write!(f, "{}P", sign)?;
+
+ if hasdate {
+ write!(f, "{}D", days)?;
+ }
+ if hastime {
+ if abs.nanos == 0 {
+ write!(f, "T{}S", secs)?;
+ } else if abs.nanos % NANOS_PER_MILLI == 0 {
+ write!(f, "T{}.{:03}S", secs, abs.nanos / NANOS_PER_MILLI)?;
+ } else if abs.nanos % NANOS_PER_MICRO == 0 {
+ write!(f, "T{}.{:06}S", secs, abs.nanos / NANOS_PER_MICRO)?;
+ } else {
+ write!(f, "T{}.{:09}S", secs, abs.nanos)?;
+ }
+ }
+ Ok(())
+ }
+}
+
+/// Represents error when converting `Duration` to/from a standard library
+/// implementation
+///
+/// The `std::time::Duration` supports a range from zero to `u64::MAX`
+/// *seconds*, while this module supports signed range of up to
+/// `i64::MAX` of *milliseconds*.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct OutOfRangeError(());
+
+impl fmt::Display for OutOfRangeError {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ write!(f, "Source duration value is out of range for the target type")
+ }
+}
+
+#[cfg(any(feature = "std", test))]
+impl Error for OutOfRangeError {
+ #[allow(deprecated)]
+ fn description(&self) -> &str {
+ "out of range error"
+ }
+}
+
+// Copied from libnum
+#[inline]
+fn div_mod_floor_64(this: i64, other: i64) -> (i64, i64) {
+ (div_floor_64(this, other), mod_floor_64(this, other))
+}
+
+#[inline]
+fn div_floor_64(this: i64, other: i64) -> i64 {
+ match div_rem_64(this, other) {
+ (d, r) if (r > 0 && other < 0) || (r < 0 && other > 0) => d - 1,
+ (d, _) => d,
+ }
+}
+
+#[inline]
+fn mod_floor_64(this: i64, other: i64) -> i64 {
+ match this % other {
+ r if (r > 0 && other < 0) || (r < 0 && other > 0) => r + other,
+ r => r,
+ }
+}
+
+#[inline]
+fn div_rem_64(this: i64, other: i64) -> (i64, i64) {
+ (this / other, this % other)
+}
+
+#[cfg(test)]
+mod tests {
+ use super::{Duration, OutOfRangeError, MAX, MIN};
+ use std::time::Duration as StdDuration;
+ use std::{i32, i64};
+
+ #[test]
+ fn test_duration() {
+ assert!(Duration::seconds(1) != Duration::zero());
+ assert_eq!(Duration::seconds(1) + Duration::seconds(2), Duration::seconds(3));
+ assert_eq!(
+ Duration::seconds(86399) + Duration::seconds(4),
+ Duration::days(1) + Duration::seconds(3)
+ );
+ assert_eq!(Duration::days(10) - Duration::seconds(1000), Duration::seconds(863000));
+ assert_eq!(Duration::days(10) - Duration::seconds(1000000), Duration::seconds(-136000));
+ assert_eq!(
+ Duration::days(2) + Duration::seconds(86399) + Duration::nanoseconds(1234567890),
+ Duration::days(3) + Duration::nanoseconds(234567890)
+ );
+ assert_eq!(-Duration::days(3), Duration::days(-3));
+ assert_eq!(
+ -(Duration::days(3) + Duration::seconds(70)),
+ Duration::days(-4) + Duration::seconds(86400 - 70)
+ );
+ }
+
+ #[test]
+ fn test_duration_num_days() {
+ assert_eq!(Duration::zero().num_days(), 0);
+ assert_eq!(Duration::days(1).num_days(), 1);
+ assert_eq!(Duration::days(-1).num_days(), -1);
+ assert_eq!(Duration::seconds(86399).num_days(), 0);
+ assert_eq!(Duration::seconds(86401).num_days(), 1);
+ assert_eq!(Duration::seconds(-86399).num_days(), 0);
+ assert_eq!(Duration::seconds(-86401).num_days(), -1);
+ assert_eq!(Duration::days(i32::MAX as i64).num_days(), i32::MAX as i64);
+ assert_eq!(Duration::days(i32::MIN as i64).num_days(), i32::MIN as i64);
+ }
+
+ #[test]
+ fn test_duration_num_seconds() {
+ assert_eq!(Duration::zero().num_seconds(), 0);
+ assert_eq!(Duration::seconds(1).num_seconds(), 1);
+ assert_eq!(Duration::seconds(-1).num_seconds(), -1);
+ assert_eq!(Duration::milliseconds(999).num_seconds(), 0);
+ assert_eq!(Duration::milliseconds(1001).num_seconds(), 1);
+ assert_eq!(Duration::milliseconds(-999).num_seconds(), 0);
+ assert_eq!(Duration::milliseconds(-1001).num_seconds(), -1);
+ }
+
+ #[test]
+ fn test_duration_num_milliseconds() {
+ assert_eq!(Duration::zero().num_milliseconds(), 0);
+ assert_eq!(Duration::milliseconds(1).num_milliseconds(), 1);
+ assert_eq!(Duration::milliseconds(-1).num_milliseconds(), -1);
+ assert_eq!(Duration::microseconds(999).num_milliseconds(), 0);
+ assert_eq!(Duration::microseconds(1001).num_milliseconds(), 1);
+ assert_eq!(Duration::microseconds(-999).num_milliseconds(), 0);
+ assert_eq!(Duration::microseconds(-1001).num_milliseconds(), -1);
+ assert_eq!(Duration::milliseconds(i64::MAX).num_milliseconds(), i64::MAX);
+ assert_eq!(Duration::milliseconds(i64::MIN).num_milliseconds(), i64::MIN);
+ assert_eq!(MAX.num_milliseconds(), i64::MAX);
+ assert_eq!(MIN.num_milliseconds(), i64::MIN);
+ }
+
+ #[test]
+ fn test_duration_num_microseconds() {
+ assert_eq!(Duration::zero().num_microseconds(), Some(0));
+ assert_eq!(Duration::microseconds(1).num_microseconds(), Some(1));
+ assert_eq!(Duration::microseconds(-1).num_microseconds(), Some(-1));
+ assert_eq!(Duration::nanoseconds(999).num_microseconds(), Some(0));
+ assert_eq!(Duration::nanoseconds(1001).num_microseconds(), Some(1));
+ assert_eq!(Duration::nanoseconds(-999).num_microseconds(), Some(0));
+ assert_eq!(Duration::nanoseconds(-1001).num_microseconds(), Some(-1));
+ assert_eq!(Duration::microseconds(i64::MAX).num_microseconds(), Some(i64::MAX));
+ assert_eq!(Duration::microseconds(i64::MIN).num_microseconds(), Some(i64::MIN));
+ assert_eq!(MAX.num_microseconds(), None);
+ assert_eq!(MIN.num_microseconds(), None);
+
+ // overflow checks
+ const MICROS_PER_DAY: i64 = 86400_000_000;
+ assert_eq!(
+ Duration::days(i64::MAX / MICROS_PER_DAY).num_microseconds(),
+ Some(i64::MAX / MICROS_PER_DAY * MICROS_PER_DAY)
+ );
+ assert_eq!(
+ Duration::days(i64::MIN / MICROS_PER_DAY).num_microseconds(),
+ Some(i64::MIN / MICROS_PER_DAY * MICROS_PER_DAY)
+ );
+ assert_eq!(Duration::days(i64::MAX / MICROS_PER_DAY + 1).num_microseconds(), None);
+ assert_eq!(Duration::days(i64::MIN / MICROS_PER_DAY - 1).num_microseconds(), None);
+ }
+
+ #[test]
+ fn test_duration_num_nanoseconds() {
+ assert_eq!(Duration::zero().num_nanoseconds(), Some(0));
+ assert_eq!(Duration::nanoseconds(1).num_nanoseconds(), Some(1));
+ assert_eq!(Duration::nanoseconds(-1).num_nanoseconds(), Some(-1));
+ assert_eq!(Duration::nanoseconds(i64::MAX).num_nanoseconds(), Some(i64::MAX));
+ assert_eq!(Duration::nanoseconds(i64::MIN).num_nanoseconds(), Some(i64::MIN));
+ assert_eq!(MAX.num_nanoseconds(), None);
+ assert_eq!(MIN.num_nanoseconds(), None);
+
+ // overflow checks
+ const NANOS_PER_DAY: i64 = 86400_000_000_000;
+ assert_eq!(
+ Duration::days(i64::MAX / NANOS_PER_DAY).num_nanoseconds(),
+ Some(i64::MAX / NANOS_PER_DAY * NANOS_PER_DAY)
+ );
+ assert_eq!(
+ Duration::days(i64::MIN / NANOS_PER_DAY).num_nanoseconds(),
+ Some(i64::MIN / NANOS_PER_DAY * NANOS_PER_DAY)
+ );
+ assert_eq!(Duration::days(i64::MAX / NANOS_PER_DAY + 1).num_nanoseconds(), None);
+ assert_eq!(Duration::days(i64::MIN / NANOS_PER_DAY - 1).num_nanoseconds(), None);
+ }
+
+ #[test]
+ fn test_duration_checked_ops() {
+ assert_eq!(
+ Duration::milliseconds(i64::MAX - 1).checked_add(&Duration::microseconds(999)),
+ Some(Duration::milliseconds(i64::MAX - 2) + Duration::microseconds(1999))
+ );
+ assert!(Duration::milliseconds(i64::MAX)
+ .checked_add(&Duration::microseconds(1000))
+ .is_none());
+
+ assert_eq!(
+ Duration::milliseconds(i64::MIN).checked_sub(&Duration::milliseconds(0)),
+ Some(Duration::milliseconds(i64::MIN))
+ );
+ assert!(Duration::milliseconds(i64::MIN).checked_sub(&Duration::milliseconds(1)).is_none());
+ }
+
+ #[test]
+ fn test_duration_mul() {
+ assert_eq!(Duration::zero() * i32::MAX, Duration::zero());
+ assert_eq!(Duration::zero() * i32::MIN, Duration::zero());
+ assert_eq!(Duration::nanoseconds(1) * 0, Duration::zero());
+ assert_eq!(Duration::nanoseconds(1) * 1, Duration::nanoseconds(1));
+ assert_eq!(Duration::nanoseconds(1) * 1_000_000_000, Duration::seconds(1));
+ assert_eq!(Duration::nanoseconds(1) * -1_000_000_000, -Duration::seconds(1));
+ assert_eq!(-Duration::nanoseconds(1) * 1_000_000_000, -Duration::seconds(1));
+ assert_eq!(
+ Duration::nanoseconds(30) * 333_333_333,
+ Duration::seconds(10) - Duration::nanoseconds(10)
+ );
+ assert_eq!(
+ (Duration::nanoseconds(1) + Duration::seconds(1) + Duration::days(1)) * 3,
+ Duration::nanoseconds(3) + Duration::seconds(3) + Duration::days(3)
+ );
+ assert_eq!(Duration::milliseconds(1500) * -2, Duration::seconds(-3));
+ assert_eq!(Duration::milliseconds(-1500) * 2, Duration::seconds(-3));
+ }
+
+ #[test]
+ fn test_duration_div() {
+ assert_eq!(Duration::zero() / i32::MAX, Duration::zero());
+ assert_eq!(Duration::zero() / i32::MIN, Duration::zero());
+ assert_eq!(Duration::nanoseconds(123_456_789) / 1, Duration::nanoseconds(123_456_789));
+ assert_eq!(Duration::nanoseconds(123_456_789) / -1, -Duration::nanoseconds(123_456_789));
+ assert_eq!(-Duration::nanoseconds(123_456_789) / -1, Duration::nanoseconds(123_456_789));
+ assert_eq!(-Duration::nanoseconds(123_456_789) / 1, -Duration::nanoseconds(123_456_789));
+ assert_eq!(Duration::seconds(1) / 3, Duration::nanoseconds(333_333_333));
+ assert_eq!(Duration::seconds(4) / 3, Duration::nanoseconds(1_333_333_333));
+ assert_eq!(Duration::seconds(-1) / 2, Duration::milliseconds(-500));
+ assert_eq!(Duration::seconds(1) / -2, Duration::milliseconds(-500));
+ assert_eq!(Duration::seconds(-1) / -2, Duration::milliseconds(500));
+ assert_eq!(Duration::seconds(-4) / 3, Duration::nanoseconds(-1_333_333_333));
+ assert_eq!(Duration::seconds(-4) / -3, Duration::nanoseconds(1_333_333_333));
+ }
+
+ #[test]
+ fn test_duration_fmt() {
+ assert_eq!(Duration::zero().to_string(), "PT0S");
+ assert_eq!(Duration::days(42).to_string(), "P42D");
+ assert_eq!(Duration::days(-42).to_string(), "-P42D");
+ assert_eq!(Duration::seconds(42).to_string(), "PT42S");
+ assert_eq!(Duration::milliseconds(42).to_string(), "PT0.042S");
+ assert_eq!(Duration::microseconds(42).to_string(), "PT0.000042S");
+ assert_eq!(Duration::nanoseconds(42).to_string(), "PT0.000000042S");
+ assert_eq!((Duration::days(7) + Duration::milliseconds(6543)).to_string(), "P7DT6.543S");
+ assert_eq!(Duration::seconds(-86401).to_string(), "-P1DT1S");
+ assert_eq!(Duration::nanoseconds(-1).to_string(), "-PT0.000000001S");
+
+ // the format specifier should have no effect on `Duration`
+ assert_eq!(
+ format!("{:30}", Duration::days(1) + Duration::milliseconds(2345)),
+ "P1DT2.345S"
+ );
+ }
+
+ #[test]
+ fn test_to_std() {
+ assert_eq!(Duration::seconds(1).to_std(), Ok(StdDuration::new(1, 0)));
+ assert_eq!(Duration::seconds(86401).to_std(), Ok(StdDuration::new(86401, 0)));
+ assert_eq!(Duration::milliseconds(123).to_std(), Ok(StdDuration::new(0, 123000000)));
+ assert_eq!(Duration::milliseconds(123765).to_std(), Ok(StdDuration::new(123, 765000000)));
+ assert_eq!(Duration::nanoseconds(777).to_std(), Ok(StdDuration::new(0, 777)));
+ assert_eq!(MAX.to_std(), Ok(StdDuration::new(9223372036854775, 807000000)));
+ assert_eq!(Duration::seconds(-1).to_std(), Err(OutOfRangeError(())));
+ assert_eq!(Duration::milliseconds(-1).to_std(), Err(OutOfRangeError(())));
+ }
+
+ #[test]
+ fn test_from_std() {
+ assert_eq!(Ok(Duration::seconds(1)), Duration::from_std(StdDuration::new(1, 0)));
+ assert_eq!(Ok(Duration::seconds(86401)), Duration::from_std(StdDuration::new(86401, 0)));
+ assert_eq!(
+ Ok(Duration::milliseconds(123)),
+ Duration::from_std(StdDuration::new(0, 123000000))
+ );
+ assert_eq!(
+ Ok(Duration::milliseconds(123765)),
+ Duration::from_std(StdDuration::new(123, 765000000))
+ );
+ assert_eq!(Ok(Duration::nanoseconds(777)), Duration::from_std(StdDuration::new(0, 777)));
+ assert_eq!(Ok(MAX), Duration::from_std(StdDuration::new(9223372036854775, 807000000)));
+ assert_eq!(
+ Duration::from_std(StdDuration::new(9223372036854776, 0)),
+ Err(OutOfRangeError(()))
+ );
+ assert_eq!(
+ Duration::from_std(StdDuration::new(9223372036854775, 807000001)),
+ Err(OutOfRangeError(()))
+ );
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-11 20:03:41 +0000