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diff --git a/src/naive/datetime.rs b/src/naive/datetime.rs new file mode 100644 index 0000000..92d6c28 --- /dev/null +++ b/src/naive/datetime.rs @@ -0,0 +1,2507 @@ +// This is a part of Chrono. +// See README.md and LICENSE.txt for details. + +//! ISO 8601 date and time without timezone. + +#[cfg(any(feature = "alloc", feature = "std", test))] +use core::borrow::Borrow; +use core::ops::{Add, AddAssign, Sub, SubAssign}; +use core::{fmt, hash, str}; +use num_traits::ToPrimitive; +use oldtime::Duration as OldDuration; + +use div::div_mod_floor; +#[cfg(any(feature = "alloc", feature = "std", test))] +use format::DelayedFormat; +use format::{parse, ParseError, ParseResult, Parsed, StrftimeItems}; +use format::{Fixed, Item, Numeric, Pad}; +use naive::date::{MAX_DATE, MIN_DATE}; +use naive::time::{MAX_TIME, MIN_TIME}; +use naive::{IsoWeek, NaiveDate, NaiveTime}; +use {Datelike, Timelike, Weekday}; + +/// The tight upper bound guarantees that a duration with `|Duration| >= 2^MAX_SECS_BITS` +/// will always overflow the addition with any date and time type. +/// +/// So why is this needed? `Duration::seconds(rhs)` may overflow, and we don't have +/// an alternative returning `Option` or `Result`. Thus we need some early bound to avoid +/// touching that call when we are already sure that it WILL overflow... +const MAX_SECS_BITS: usize = 44; + +/// The minimum possible `NaiveDateTime`. +pub const MIN_DATETIME: NaiveDateTime = NaiveDateTime { date: MIN_DATE, time: MIN_TIME }; +/// The maximum possible `NaiveDateTime`. +pub const MAX_DATETIME: NaiveDateTime = NaiveDateTime { date: MAX_DATE, time: MAX_TIME }; + +/// ISO 8601 combined date and time without timezone. +/// +/// # Example +/// +/// `NaiveDateTime` is commonly created from [`NaiveDate`](./struct.NaiveDate.html). +/// +/// ~~~~ +/// use chrono::{NaiveDate, NaiveDateTime}; +/// +/// let dt: NaiveDateTime = NaiveDate::from_ymd(2016, 7, 8).and_hms(9, 10, 11); +/// # let _ = dt; +/// ~~~~ +/// +/// You can use typical [date-like](../trait.Datelike.html) and +/// [time-like](../trait.Timelike.html) methods, +/// provided that relevant traits are in the scope. +/// +/// ~~~~ +/// # use chrono::{NaiveDate, NaiveDateTime}; +/// # let dt: NaiveDateTime = NaiveDate::from_ymd(2016, 7, 8).and_hms(9, 10, 11); +/// use chrono::{Datelike, Timelike, Weekday}; +/// +/// assert_eq!(dt.weekday(), Weekday::Fri); +/// assert_eq!(dt.num_seconds_from_midnight(), 33011); +/// ~~~~ +#[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)] +pub struct NaiveDateTime { + date: NaiveDate, + time: NaiveTime, +} + +impl NaiveDateTime { + /// Makes a new `NaiveDateTime` from date and time components. + /// Equivalent to [`date.and_time(time)`](./struct.NaiveDate.html#method.and_time) + /// and many other helper constructors on `NaiveDate`. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveTime, NaiveDateTime}; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// let t = NaiveTime::from_hms_milli(12, 34, 56, 789); + /// + /// let dt = NaiveDateTime::new(d, t); + /// assert_eq!(dt.date(), d); + /// assert_eq!(dt.time(), t); + /// ~~~~ + #[inline] + pub fn new(date: NaiveDate, time: NaiveTime) -> NaiveDateTime { + NaiveDateTime { date: date, time: time } + } + + /// Makes a new `NaiveDateTime` corresponding to a UTC date and time, + /// from the number of non-leap seconds + /// since the midnight UTC on January 1, 1970 (aka "UNIX timestamp") + /// and the number of nanoseconds since the last whole non-leap second. + /// + /// For a non-naive version of this function see + /// [`TimeZone::timestamp`](../offset/trait.TimeZone.html#method.timestamp). + /// + /// The nanosecond part can exceed 1,000,000,000 in order to represent the + /// [leap second](./struct.NaiveTime.html#leap-second-handling). (The true "UNIX + /// timestamp" cannot represent a leap second unambiguously.) + /// + /// Panics on the out-of-range number of seconds and/or invalid nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDateTime, NaiveDate}; + /// + /// let dt = NaiveDateTime::from_timestamp(0, 42_000_000); + /// assert_eq!(dt, NaiveDate::from_ymd(1970, 1, 1).and_hms_milli(0, 0, 0, 42)); + /// + /// let dt = NaiveDateTime::from_timestamp(1_000_000_000, 0); + /// assert_eq!(dt, NaiveDate::from_ymd(2001, 9, 9).and_hms(1, 46, 40)); + /// ~~~~ + #[inline] + pub fn from_timestamp(secs: i64, nsecs: u32) -> NaiveDateTime { + let datetime = NaiveDateTime::from_timestamp_opt(secs, nsecs); + datetime.expect("invalid or out-of-range datetime") + } + + /// Makes a new `NaiveDateTime` corresponding to a UTC date and time, + /// from the number of non-leap seconds + /// since the midnight UTC on January 1, 1970 (aka "UNIX timestamp") + /// and the number of nanoseconds since the last whole non-leap second. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// (The true "UNIX timestamp" cannot represent a leap second unambiguously.) + /// + /// Returns `None` on the out-of-range number of seconds and/or invalid nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDateTime, NaiveDate}; + /// use std::i64; + /// + /// let from_timestamp_opt = NaiveDateTime::from_timestamp_opt; + /// + /// assert!(from_timestamp_opt(0, 0).is_some()); + /// assert!(from_timestamp_opt(0, 999_999_999).is_some()); + /// assert!(from_timestamp_opt(0, 1_500_000_000).is_some()); // leap second + /// assert!(from_timestamp_opt(0, 2_000_000_000).is_none()); + /// assert!(from_timestamp_opt(i64::MAX, 0).is_none()); + /// ~~~~ + #[inline] + pub fn from_timestamp_opt(secs: i64, nsecs: u32) -> Option<NaiveDateTime> { + let (days, secs) = div_mod_floor(secs, 86_400); + let date = days + .to_i32() + .and_then(|days| days.checked_add(719_163)) + .and_then(NaiveDate::from_num_days_from_ce_opt); + let time = NaiveTime::from_num_seconds_from_midnight_opt(secs as u32, nsecs); + match (date, time) { + (Some(date), Some(time)) => Some(NaiveDateTime { date: date, time: time }), + (_, _) => None, + } + } + + /// Parses a string with the specified format string and returns a new `NaiveDateTime`. + /// See the [`format::strftime` module](../format/strftime/index.html) + /// on the supported escape sequences. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDateTime, NaiveDate}; + /// + /// let parse_from_str = NaiveDateTime::parse_from_str; + /// + /// assert_eq!(parse_from_str("2015-09-05 23:56:04", "%Y-%m-%d %H:%M:%S"), + /// Ok(NaiveDate::from_ymd(2015, 9, 5).and_hms(23, 56, 4))); + /// assert_eq!(parse_from_str("5sep2015pm012345.6789", "%d%b%Y%p%I%M%S%.f"), + /// Ok(NaiveDate::from_ymd(2015, 9, 5).and_hms_micro(13, 23, 45, 678_900))); + /// ~~~~ + /// + /// Offset is ignored for the purpose of parsing. + /// + /// ~~~~ + /// # use chrono::{NaiveDateTime, NaiveDate}; + /// # let parse_from_str = NaiveDateTime::parse_from_str; + /// assert_eq!(parse_from_str("2014-5-17T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), + /// Ok(NaiveDate::from_ymd(2014, 5, 17).and_hms(12, 34, 56))); + /// ~~~~ + /// + /// [Leap seconds](./struct.NaiveTime.html#leap-second-handling) are correctly handled by + /// treating any time of the form `hh:mm:60` as a leap second. + /// (This equally applies to the formatting, so the round trip is possible.) + /// + /// ~~~~ + /// # use chrono::{NaiveDateTime, NaiveDate}; + /// # let parse_from_str = NaiveDateTime::parse_from_str; + /// assert_eq!(parse_from_str("2015-07-01 08:59:60.123", "%Y-%m-%d %H:%M:%S%.f"), + /// Ok(NaiveDate::from_ymd(2015, 7, 1).and_hms_milli(8, 59, 59, 1_123))); + /// ~~~~ + /// + /// Missing seconds are assumed to be zero, + /// but out-of-bound times or insufficient fields are errors otherwise. + /// + /// ~~~~ + /// # use chrono::{NaiveDateTime, NaiveDate}; + /// # let parse_from_str = NaiveDateTime::parse_from_str; + /// assert_eq!(parse_from_str("94/9/4 7:15", "%y/%m/%d %H:%M"), + /// Ok(NaiveDate::from_ymd(1994, 9, 4).and_hms(7, 15, 0))); + /// + /// assert!(parse_from_str("04m33s", "%Mm%Ss").is_err()); + /// assert!(parse_from_str("94/9/4 12", "%y/%m/%d %H").is_err()); + /// assert!(parse_from_str("94/9/4 17:60", "%y/%m/%d %H:%M").is_err()); + /// assert!(parse_from_str("94/9/4 24:00:00", "%y/%m/%d %H:%M:%S").is_err()); + /// ~~~~ + /// + /// All parsed fields should be consistent to each other, otherwise it's an error. + /// + /// ~~~~ + /// # use chrono::NaiveDateTime; + /// # let parse_from_str = NaiveDateTime::parse_from_str; + /// let fmt = "%Y-%m-%d %H:%M:%S = UNIX timestamp %s"; + /// assert!(parse_from_str("2001-09-09 01:46:39 = UNIX timestamp 999999999", fmt).is_ok()); + /// assert!(parse_from_str("1970-01-01 00:00:00 = UNIX timestamp 1", fmt).is_err()); + /// ~~~~ + pub fn parse_from_str(s: &str, fmt: &str) -> ParseResult<NaiveDateTime> { + let mut parsed = Parsed::new(); + parse(&mut parsed, s, StrftimeItems::new(fmt))?; + parsed.to_naive_datetime_with_offset(0) // no offset adjustment + } + + /// Retrieves a date component. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(2016, 7, 8).and_hms(9, 10, 11); + /// assert_eq!(dt.date(), NaiveDate::from_ymd(2016, 7, 8)); + /// ~~~~ + #[inline] + pub fn date(&self) -> NaiveDate { + self.date + } + + /// Retrieves a time component. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveTime}; + /// + /// let dt = NaiveDate::from_ymd(2016, 7, 8).and_hms(9, 10, 11); + /// assert_eq!(dt.time(), NaiveTime::from_hms(9, 10, 11)); + /// ~~~~ + #[inline] + pub fn time(&self) -> NaiveTime { + self.time + } + + /// Returns the number of non-leap seconds since the midnight on January 1, 1970. + /// + /// Note that this does *not* account for the timezone! + /// The true "UNIX timestamp" would count seconds since the midnight *UTC* on the epoch. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(1970, 1, 1).and_hms_milli(0, 0, 1, 980); + /// assert_eq!(dt.timestamp(), 1); + /// + /// let dt = NaiveDate::from_ymd(2001, 9, 9).and_hms(1, 46, 40); + /// assert_eq!(dt.timestamp(), 1_000_000_000); + /// + /// let dt = NaiveDate::from_ymd(1969, 12, 31).and_hms(23, 59, 59); + /// assert_eq!(dt.timestamp(), -1); + /// + /// let dt = NaiveDate::from_ymd(-1, 1, 1).and_hms(0, 0, 0); + /// assert_eq!(dt.timestamp(), -62198755200); + /// ~~~~ + #[inline] + pub fn timestamp(&self) -> i64 { + const UNIX_EPOCH_DAY: i64 = 719_163; + let gregorian_day = i64::from(self.date.num_days_from_ce()); + let seconds_from_midnight = i64::from(self.time.num_seconds_from_midnight()); + (gregorian_day - UNIX_EPOCH_DAY) * 86_400 + seconds_from_midnight + } + + /// Returns the number of non-leap *milliseconds* since midnight on January 1, 1970. + /// + /// Note that this does *not* account for the timezone! + /// The true "UNIX timestamp" would count seconds since the midnight *UTC* on the epoch. + /// + /// Note also that this does reduce the number of years that can be + /// represented from ~584 Billion to ~584 Million. (If this is a problem, + /// please file an issue to let me know what domain needs millisecond + /// precision over billions of years, I'm curious.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(1970, 1, 1).and_hms_milli(0, 0, 1, 444); + /// assert_eq!(dt.timestamp_millis(), 1_444); + /// + /// let dt = NaiveDate::from_ymd(2001, 9, 9).and_hms_milli(1, 46, 40, 555); + /// assert_eq!(dt.timestamp_millis(), 1_000_000_000_555); + /// + /// let dt = NaiveDate::from_ymd(1969, 12, 31).and_hms_milli(23, 59, 59, 100); + /// assert_eq!(dt.timestamp_millis(), -900); + /// ~~~~ + #[inline] + pub fn timestamp_millis(&self) -> i64 { + let as_ms = self.timestamp() * 1000; + as_ms + i64::from(self.timestamp_subsec_millis()) + } + + /// Returns the number of non-leap *nanoseconds* since midnight on January 1, 1970. + /// + /// Note that this does *not* account for the timezone! + /// The true "UNIX timestamp" would count seconds since the midnight *UTC* on the epoch. + /// + /// # Panics + /// + /// Note also that this does reduce the number of years that can be + /// represented from ~584 Billion to ~584 years. The dates that can be + /// represented as nanoseconds are between 1677-09-21T00:12:44.0 and + /// 2262-04-11T23:47:16.854775804. + /// + /// (If this is a problem, please file an issue to let me know what domain + /// needs nanosecond precision over millennia, I'm curious.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime}; + /// + /// let dt = NaiveDate::from_ymd(1970, 1, 1).and_hms_nano(0, 0, 1, 444); + /// assert_eq!(dt.timestamp_nanos(), 1_000_000_444); + /// + /// let dt = NaiveDate::from_ymd(2001, 9, 9).and_hms_nano(1, 46, 40, 555); + /// + /// const A_BILLION: i64 = 1_000_000_000; + /// let nanos = dt.timestamp_nanos(); + /// assert_eq!(nanos, 1_000_000_000_000_000_555); + /// assert_eq!( + /// dt, + /// NaiveDateTime::from_timestamp(nanos / A_BILLION, (nanos % A_BILLION) as u32) + /// ); + /// ~~~~ + #[inline] + pub fn timestamp_nanos(&self) -> i64 { + let as_ns = self.timestamp() * 1_000_000_000; + as_ns + i64::from(self.timestamp_subsec_nanos()) + } + + /// Returns the number of milliseconds since the last whole non-leap second. + /// + /// The return value ranges from 0 to 999, + /// or for [leap seconds](./struct.NaiveTime.html#leap-second-handling), to 1,999. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(2016, 7, 8).and_hms_nano(9, 10, 11, 123_456_789); + /// assert_eq!(dt.timestamp_subsec_millis(), 123); + /// + /// let dt = NaiveDate::from_ymd(2015, 7, 1).and_hms_nano(8, 59, 59, 1_234_567_890); + /// assert_eq!(dt.timestamp_subsec_millis(), 1_234); + /// ~~~~ + #[inline] + pub fn timestamp_subsec_millis(&self) -> u32 { + self.timestamp_subsec_nanos() / 1_000_000 + } + + /// Returns the number of microseconds since the last whole non-leap second. + /// + /// The return value ranges from 0 to 999,999, + /// or for [leap seconds](./struct.NaiveTime.html#leap-second-handling), to 1,999,999. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(2016, 7, 8).and_hms_nano(9, 10, 11, 123_456_789); + /// assert_eq!(dt.timestamp_subsec_micros(), 123_456); + /// + /// let dt = NaiveDate::from_ymd(2015, 7, 1).and_hms_nano(8, 59, 59, 1_234_567_890); + /// assert_eq!(dt.timestamp_subsec_micros(), 1_234_567); + /// ~~~~ + #[inline] + pub fn timestamp_subsec_micros(&self) -> u32 { + self.timestamp_subsec_nanos() / 1_000 + } + + /// Returns the number of nanoseconds since the last whole non-leap second. + /// + /// The return value ranges from 0 to 999,999,999, + /// or for [leap seconds](./struct.NaiveTime.html#leap-second-handling), to 1,999,999,999. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(2016, 7, 8).and_hms_nano(9, 10, 11, 123_456_789); + /// assert_eq!(dt.timestamp_subsec_nanos(), 123_456_789); + /// + /// let dt = NaiveDate::from_ymd(2015, 7, 1).and_hms_nano(8, 59, 59, 1_234_567_890); + /// assert_eq!(dt.timestamp_subsec_nanos(), 1_234_567_890); + /// ~~~~ + #[inline] + pub fn timestamp_subsec_nanos(&self) -> u32 { + self.time.nanosecond() + } + + /// Adds given `Duration` to the current date and time. + /// + /// As a part of Chrono's [leap second handling](./struct.NaiveTime.html#leap-second-handling), + /// the addition assumes that **there is no leap second ever**, + /// except when the `NaiveDateTime` itself represents a leap second + /// in which case the assumption becomes that **there is exactly a single leap second ever**. + /// + /// Returns `None` when it will result in overflow. + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveDate}; + /// + /// let from_ymd = NaiveDate::from_ymd; + /// + /// let d = from_ymd(2016, 7, 8); + /// let hms = |h, m, s| d.and_hms(h, m, s); + /// assert_eq!(hms(3, 5, 7).checked_add_signed(Duration::zero()), + /// Some(hms(3, 5, 7))); + /// assert_eq!(hms(3, 5, 7).checked_add_signed(Duration::seconds(1)), + /// Some(hms(3, 5, 8))); + /// assert_eq!(hms(3, 5, 7).checked_add_signed(Duration::seconds(-1)), + /// Some(hms(3, 5, 6))); + /// assert_eq!(hms(3, 5, 7).checked_add_signed(Duration::seconds(3600 + 60)), + /// Some(hms(4, 6, 7))); + /// assert_eq!(hms(3, 5, 7).checked_add_signed(Duration::seconds(86_400)), + /// Some(from_ymd(2016, 7, 9).and_hms(3, 5, 7))); + /// + /// let hmsm = |h, m, s, milli| d.and_hms_milli(h, m, s, milli); + /// assert_eq!(hmsm(3, 5, 7, 980).checked_add_signed(Duration::milliseconds(450)), + /// Some(hmsm(3, 5, 8, 430))); + /// # } + /// ~~~~ + /// + /// Overflow returns `None`. + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// # use chrono::{Duration, NaiveDate}; + /// # let hms = |h, m, s| NaiveDate::from_ymd(2016, 7, 8).and_hms(h, m, s); + /// assert_eq!(hms(3, 5, 7).checked_add_signed(Duration::days(1_000_000_000)), None); + /// # } + /// ~~~~ + /// + /// Leap seconds are handled, + /// but the addition assumes that it is the only leap second happened. + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// # use chrono::{Duration, NaiveDate}; + /// # let from_ymd = NaiveDate::from_ymd; + /// # let hmsm = |h, m, s, milli| from_ymd(2016, 7, 8).and_hms_milli(h, m, s, milli); + /// let leap = hmsm(3, 5, 59, 1_300); + /// assert_eq!(leap.checked_add_signed(Duration::zero()), + /// Some(hmsm(3, 5, 59, 1_300))); + /// assert_eq!(leap.checked_add_signed(Duration::milliseconds(-500)), + /// Some(hmsm(3, 5, 59, 800))); + /// assert_eq!(leap.checked_add_signed(Duration::milliseconds(500)), + /// Some(hmsm(3, 5, 59, 1_800))); + /// assert_eq!(leap.checked_add_signed(Duration::milliseconds(800)), + /// Some(hmsm(3, 6, 0, 100))); + /// assert_eq!(leap.checked_add_signed(Duration::seconds(10)), + /// Some(hmsm(3, 6, 9, 300))); + /// assert_eq!(leap.checked_add_signed(Duration::seconds(-10)), + /// Some(hmsm(3, 5, 50, 300))); + /// assert_eq!(leap.checked_add_signed(Duration::days(1)), + /// Some(from_ymd(2016, 7, 9).and_hms_milli(3, 5, 59, 300))); + /// # } + /// ~~~~ + pub fn checked_add_signed(self, rhs: OldDuration) -> Option<NaiveDateTime> { + let (time, rhs) = self.time.overflowing_add_signed(rhs); + + // early checking to avoid overflow in OldDuration::seconds + if rhs <= (-1 << MAX_SECS_BITS) || rhs >= (1 << MAX_SECS_BITS) { + return None; + } + + let date = try_opt!(self.date.checked_add_signed(OldDuration::seconds(rhs))); + Some(NaiveDateTime { date: date, time: time }) + } + + /// Subtracts given `Duration` from the current date and time. + /// + /// As a part of Chrono's [leap second handling](./struct.NaiveTime.html#leap-second-handling), + /// the subtraction assumes that **there is no leap second ever**, + /// except when the `NaiveDateTime` itself represents a leap second + /// in which case the assumption becomes that **there is exactly a single leap second ever**. + /// + /// Returns `None` when it will result in overflow. + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveDate}; + /// + /// let from_ymd = NaiveDate::from_ymd; + /// + /// let d = from_ymd(2016, 7, 8); + /// let hms = |h, m, s| d.and_hms(h, m, s); + /// assert_eq!(hms(3, 5, 7).checked_sub_signed(Duration::zero()), + /// Some(hms(3, 5, 7))); + /// assert_eq!(hms(3, 5, 7).checked_sub_signed(Duration::seconds(1)), + /// Some(hms(3, 5, 6))); + /// assert_eq!(hms(3, 5, 7).checked_sub_signed(Duration::seconds(-1)), + /// Some(hms(3, 5, 8))); + /// assert_eq!(hms(3, 5, 7).checked_sub_signed(Duration::seconds(3600 + 60)), + /// Some(hms(2, 4, 7))); + /// assert_eq!(hms(3, 5, 7).checked_sub_signed(Duration::seconds(86_400)), + /// Some(from_ymd(2016, 7, 7).and_hms(3, 5, 7))); + /// + /// let hmsm = |h, m, s, milli| d.and_hms_milli(h, m, s, milli); + /// assert_eq!(hmsm(3, 5, 7, 450).checked_sub_signed(Duration::milliseconds(670)), + /// Some(hmsm(3, 5, 6, 780))); + /// # } + /// ~~~~ + /// + /// Overflow returns `None`. + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// # use chrono::{Duration, NaiveDate}; + /// # let hms = |h, m, s| NaiveDate::from_ymd(2016, 7, 8).and_hms(h, m, s); + /// assert_eq!(hms(3, 5, 7).checked_sub_signed(Duration::days(1_000_000_000)), None); + /// # } + /// ~~~~ + /// + /// Leap seconds are handled, + /// but the subtraction assumes that it is the only leap second happened. + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// # use chrono::{Duration, NaiveDate}; + /// # let from_ymd = NaiveDate::from_ymd; + /// # let hmsm = |h, m, s, milli| from_ymd(2016, 7, 8).and_hms_milli(h, m, s, milli); + /// let leap = hmsm(3, 5, 59, 1_300); + /// assert_eq!(leap.checked_sub_signed(Duration::zero()), + /// Some(hmsm(3, 5, 59, 1_300))); + /// assert_eq!(leap.checked_sub_signed(Duration::milliseconds(200)), + /// Some(hmsm(3, 5, 59, 1_100))); + /// assert_eq!(leap.checked_sub_signed(Duration::milliseconds(500)), + /// Some(hmsm(3, 5, 59, 800))); + /// assert_eq!(leap.checked_sub_signed(Duration::seconds(60)), + /// Some(hmsm(3, 5, 0, 300))); + /// assert_eq!(leap.checked_sub_signed(Duration::days(1)), + /// Some(from_ymd(2016, 7, 7).and_hms_milli(3, 6, 0, 300))); + /// # } + /// ~~~~ + pub fn checked_sub_signed(self, rhs: OldDuration) -> Option<NaiveDateTime> { + let (time, rhs) = self.time.overflowing_sub_signed(rhs); + + // early checking to avoid overflow in OldDuration::seconds + if rhs <= (-1 << MAX_SECS_BITS) || rhs >= (1 << MAX_SECS_BITS) { + return None; + } + + let date = try_opt!(self.date.checked_sub_signed(OldDuration::seconds(rhs))); + Some(NaiveDateTime { date: date, time: time }) + } + + /// Subtracts another `NaiveDateTime` from the current date and time. + /// This does not overflow or underflow at all. + /// + /// As a part of Chrono's [leap second handling](./struct.NaiveTime.html#leap-second-handling), + /// the subtraction assumes that **there is no leap second ever**, + /// except when any of the `NaiveDateTime`s themselves represents a leap second + /// in which case the assumption becomes that + /// **there are exactly one (or two) leap second(s) ever**. + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveDate}; + /// + /// let from_ymd = NaiveDate::from_ymd; + /// + /// let d = from_ymd(2016, 7, 8); + /// assert_eq!(d.and_hms(3, 5, 7).signed_duration_since(d.and_hms(2, 4, 6)), + /// Duration::seconds(3600 + 60 + 1)); + /// + /// // July 8 is 190th day in the year 2016 + /// let d0 = from_ymd(2016, 1, 1); + /// assert_eq!(d.and_hms_milli(0, 7, 6, 500).signed_duration_since(d0.and_hms(0, 0, 0)), + /// Duration::seconds(189 * 86_400 + 7 * 60 + 6) + Duration::milliseconds(500)); + /// # } + /// ~~~~ + /// + /// Leap seconds are handled, but the subtraction assumes that + /// there were no other leap seconds happened. + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// # use chrono::{Duration, NaiveDate}; + /// # let from_ymd = NaiveDate::from_ymd; + /// let leap = from_ymd(2015, 6, 30).and_hms_milli(23, 59, 59, 1_500); + /// assert_eq!(leap.signed_duration_since(from_ymd(2015, 6, 30).and_hms(23, 0, 0)), + /// Duration::seconds(3600) + Duration::milliseconds(500)); + /// assert_eq!(from_ymd(2015, 7, 1).and_hms(1, 0, 0).signed_duration_since(leap), + /// Duration::seconds(3600) - Duration::milliseconds(500)); + /// # } + /// ~~~~ + pub fn signed_duration_since(self, rhs: NaiveDateTime) -> OldDuration { + self.date.signed_duration_since(rhs.date) + self.time.signed_duration_since(rhs.time) + } + + /// Formats the combined date and time with the specified formatting items. + /// Otherwise it is the same as the ordinary [`format`](#method.format) method. + /// + /// The `Iterator` of items should be `Clone`able, + /// since the resulting `DelayedFormat` value may be formatted multiple times. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// use chrono::format::strftime::StrftimeItems; + /// + /// let fmt = StrftimeItems::new("%Y-%m-%d %H:%M:%S"); + /// let dt = NaiveDate::from_ymd(2015, 9, 5).and_hms(23, 56, 4); + /// assert_eq!(dt.format_with_items(fmt.clone()).to_string(), "2015-09-05 23:56:04"); + /// assert_eq!(dt.format("%Y-%m-%d %H:%M:%S").to_string(), "2015-09-05 23:56:04"); + /// ~~~~ + /// + /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. + /// + /// ~~~~ + /// # use chrono::NaiveDate; + /// # use chrono::format::strftime::StrftimeItems; + /// # let fmt = StrftimeItems::new("%Y-%m-%d %H:%M:%S").clone(); + /// # let dt = NaiveDate::from_ymd(2015, 9, 5).and_hms(23, 56, 4); + /// assert_eq!(format!("{}", dt.format_with_items(fmt)), "2015-09-05 23:56:04"); + /// ~~~~ + #[cfg(any(feature = "alloc", feature = "std", test))] + #[inline] + pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I> + where + I: Iterator<Item = B> + Clone, + B: Borrow<Item<'a>>, + { + DelayedFormat::new(Some(self.date), Some(self.time), items) + } + + /// Formats the combined date and time with the specified format string. + /// See the [`format::strftime` module](../format/strftime/index.html) + /// on the supported escape sequences. + /// + /// This returns a `DelayedFormat`, + /// which gets converted to a string only when actual formatting happens. + /// You may use the `to_string` method to get a `String`, + /// or just feed it into `print!` and other formatting macros. + /// (In this way it avoids the redundant memory allocation.) + /// + /// A wrong format string does *not* issue an error immediately. + /// Rather, converting or formatting the `DelayedFormat` fails. + /// You are recommended to immediately use `DelayedFormat` for this reason. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let dt = NaiveDate::from_ymd(2015, 9, 5).and_hms(23, 56, 4); + /// assert_eq!(dt.format("%Y-%m-%d %H:%M:%S").to_string(), "2015-09-05 23:56:04"); + /// assert_eq!(dt.format("around %l %p on %b %-d").to_string(), "around 11 PM on Sep 5"); + /// ~~~~ + /// + /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. + /// + /// ~~~~ + /// # use chrono::NaiveDate; + /// # let dt = NaiveDate::from_ymd(2015, 9, 5).and_hms(23, 56, 4); + /// assert_eq!(format!("{}", dt.format("%Y-%m-%d %H:%M:%S")), "2015-09-05 23:56:04"); + /// assert_eq!(format!("{}", dt.format("around %l %p on %b %-d")), "around 11 PM on Sep 5"); + /// ~~~~ + #[cfg(any(feature = "alloc", feature = "std", test))] + #[inline] + pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat<StrftimeItems<'a>> { + self.format_with_items(StrftimeItems::new(fmt)) + } +} + +impl Datelike for NaiveDateTime { + /// Returns the year number in the [calendar date](./index.html#calendar-date). + /// + /// See also the [`NaiveDate::year`](./struct.NaiveDate.html#method.year) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.year(), 2015); + /// ~~~~ + #[inline] + fn year(&self) -> i32 { + self.date.year() + } + + /// Returns the month number starting from 1. + /// + /// The return value ranges from 1 to 12. + /// + /// See also the [`NaiveDate::month`](./struct.NaiveDate.html#method.month) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.month(), 9); + /// ~~~~ + #[inline] + fn month(&self) -> u32 { + self.date.month() + } + + /// Returns the month number starting from 0. + /// + /// The return value ranges from 0 to 11. + /// + /// See also the [`NaiveDate::month0`](./struct.NaiveDate.html#method.month0) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.month0(), 8); + /// ~~~~ + #[inline] + fn month0(&self) -> u32 { + self.date.month0() + } + + /// Returns the day of month starting from 1. + /// + /// The return value ranges from 1 to 31. (The last day of month differs by months.) + /// + /// See also the [`NaiveDate::day`](./struct.NaiveDate.html#method.day) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.day(), 25); + /// ~~~~ + #[inline] + fn day(&self) -> u32 { + self.date.day() + } + + /// Returns the day of month starting from 0. + /// + /// The return value ranges from 0 to 30. (The last day of month differs by months.) + /// + /// See also the [`NaiveDate::day0`](./struct.NaiveDate.html#method.day0) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.day0(), 24); + /// ~~~~ + #[inline] + fn day0(&self) -> u32 { + self.date.day0() + } + + /// Returns the day of year starting from 1. + /// + /// The return value ranges from 1 to 366. (The last day of year differs by years.) + /// + /// See also the [`NaiveDate::ordinal`](./struct.NaiveDate.html#method.ordinal) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.ordinal(), 268); + /// ~~~~ + #[inline] + fn ordinal(&self) -> u32 { + self.date.ordinal() + } + + /// Returns the day of year starting from 0. + /// + /// The return value ranges from 0 to 365. (The last day of year differs by years.) + /// + /// See also the [`NaiveDate::ordinal0`](./struct.NaiveDate.html#method.ordinal0) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.ordinal0(), 267); + /// ~~~~ + #[inline] + fn ordinal0(&self) -> u32 { + self.date.ordinal0() + } + + /// Returns the day of week. + /// + /// See also the [`NaiveDate::weekday`](./struct.NaiveDate.html#method.weekday) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Weekday}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.weekday(), Weekday::Fri); + /// ~~~~ + #[inline] + fn weekday(&self) -> Weekday { + self.date.weekday() + } + + #[inline] + fn iso_week(&self) -> IsoWeek { + self.date.iso_week() + } + + /// Makes a new `NaiveDateTime` with the year number changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_year`](./struct.NaiveDate.html#method.with_year) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 25).and_hms(12, 34, 56); + /// assert_eq!(dt.with_year(2016), Some(NaiveDate::from_ymd(2016, 9, 25).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_year(-308), Some(NaiveDate::from_ymd(-308, 9, 25).and_hms(12, 34, 56))); + /// ~~~~ + #[inline] + fn with_year(&self, year: i32) -> Option<NaiveDateTime> { + self.date.with_year(year).map(|d| NaiveDateTime { date: d, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the month number (starting from 1) changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_month`](./struct.NaiveDate.html#method.with_month) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 30).and_hms(12, 34, 56); + /// assert_eq!(dt.with_month(10), Some(NaiveDate::from_ymd(2015, 10, 30).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_month(13), None); // no month 13 + /// assert_eq!(dt.with_month(2), None); // no February 30 + /// ~~~~ + #[inline] + fn with_month(&self, month: u32) -> Option<NaiveDateTime> { + self.date.with_month(month).map(|d| NaiveDateTime { date: d, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the month number (starting from 0) changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_month0`](./struct.NaiveDate.html#method.with_month0) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 30).and_hms(12, 34, 56); + /// assert_eq!(dt.with_month0(9), Some(NaiveDate::from_ymd(2015, 10, 30).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_month0(12), None); // no month 13 + /// assert_eq!(dt.with_month0(1), None); // no February 30 + /// ~~~~ + #[inline] + fn with_month0(&self, month0: u32) -> Option<NaiveDateTime> { + self.date.with_month0(month0).map(|d| NaiveDateTime { date: d, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the day of month (starting from 1) changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_day`](./struct.NaiveDate.html#method.with_day) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms(12, 34, 56); + /// assert_eq!(dt.with_day(30), Some(NaiveDate::from_ymd(2015, 9, 30).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_day(31), None); // no September 31 + /// ~~~~ + #[inline] + fn with_day(&self, day: u32) -> Option<NaiveDateTime> { + self.date.with_day(day).map(|d| NaiveDateTime { date: d, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the day of month (starting from 0) changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_day0`](./struct.NaiveDate.html#method.with_day0) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms(12, 34, 56); + /// assert_eq!(dt.with_day0(29), Some(NaiveDate::from_ymd(2015, 9, 30).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_day0(30), None); // no September 31 + /// ~~~~ + #[inline] + fn with_day0(&self, day0: u32) -> Option<NaiveDateTime> { + self.date.with_day0(day0).map(|d| NaiveDateTime { date: d, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the day of year (starting from 1) changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_ordinal`](./struct.NaiveDate.html#method.with_ordinal) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms(12, 34, 56); + /// assert_eq!(dt.with_ordinal(60), + /// Some(NaiveDate::from_ymd(2015, 3, 1).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_ordinal(366), None); // 2015 had only 365 days + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2016, 9, 8).and_hms(12, 34, 56); + /// assert_eq!(dt.with_ordinal(60), + /// Some(NaiveDate::from_ymd(2016, 2, 29).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_ordinal(366), + /// Some(NaiveDate::from_ymd(2016, 12, 31).and_hms(12, 34, 56))); + /// ~~~~ + #[inline] + fn with_ordinal(&self, ordinal: u32) -> Option<NaiveDateTime> { + self.date.with_ordinal(ordinal).map(|d| NaiveDateTime { date: d, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the day of year (starting from 0) changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveDate::with_ordinal0`](./struct.NaiveDate.html#method.with_ordinal0) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms(12, 34, 56); + /// assert_eq!(dt.with_ordinal0(59), + /// Some(NaiveDate::from_ymd(2015, 3, 1).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_ordinal0(365), None); // 2015 had only 365 days + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2016, 9, 8).and_hms(12, 34, 56); + /// assert_eq!(dt.with_ordinal0(59), + /// Some(NaiveDate::from_ymd(2016, 2, 29).and_hms(12, 34, 56))); + /// assert_eq!(dt.with_ordinal0(365), + /// Some(NaiveDate::from_ymd(2016, 12, 31).and_hms(12, 34, 56))); + /// ~~~~ + #[inline] + fn with_ordinal0(&self, ordinal0: u32) -> Option<NaiveDateTime> { + self.date.with_ordinal0(ordinal0).map(|d| NaiveDateTime { date: d, ..*self }) + } +} + +impl Timelike for NaiveDateTime { + /// Returns the hour number from 0 to 23. + /// + /// See also the [`NaiveTime::hour`](./struct.NaiveTime.html#method.hour) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.hour(), 12); + /// ~~~~ + #[inline] + fn hour(&self) -> u32 { + self.time.hour() + } + + /// Returns the minute number from 0 to 59. + /// + /// See also the [`NaiveTime::minute`](./struct.NaiveTime.html#method.minute) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.minute(), 34); + /// ~~~~ + #[inline] + fn minute(&self) -> u32 { + self.time.minute() + } + + /// Returns the second number from 0 to 59. + /// + /// See also the [`NaiveTime::second`](./struct.NaiveTime.html#method.second) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.second(), 56); + /// ~~~~ + #[inline] + fn second(&self) -> u32 { + self.time.second() + } + + /// Returns the number of nanoseconds since the whole non-leap second. + /// The range from 1,000,000,000 to 1,999,999,999 represents + /// the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// See also the + /// [`NaiveTime::nanosecond`](./struct.NaiveTime.html#method.nanosecond) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.nanosecond(), 789_000_000); + /// ~~~~ + #[inline] + fn nanosecond(&self) -> u32 { + self.time.nanosecond() + } + + /// Makes a new `NaiveDateTime` with the hour number changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveTime::with_hour`](./struct.NaiveTime.html#method.with_hour) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.with_hour(7), + /// Some(NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(7, 34, 56, 789))); + /// assert_eq!(dt.with_hour(24), None); + /// ~~~~ + #[inline] + fn with_hour(&self, hour: u32) -> Option<NaiveDateTime> { + self.time.with_hour(hour).map(|t| NaiveDateTime { time: t, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the minute number changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// + /// See also the + /// [`NaiveTime::with_minute`](./struct.NaiveTime.html#method.with_minute) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.with_minute(45), + /// Some(NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 45, 56, 789))); + /// assert_eq!(dt.with_minute(60), None); + /// ~~~~ + #[inline] + fn with_minute(&self, min: u32) -> Option<NaiveDateTime> { + self.time.with_minute(min).map(|t| NaiveDateTime { time: t, ..*self }) + } + + /// Makes a new `NaiveDateTime` with the second number changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// As with the [`second`](#method.second) method, + /// the input range is restricted to 0 through 59. + /// + /// See also the + /// [`NaiveTime::with_second`](./struct.NaiveTime.html#method.with_second) method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.with_second(17), + /// Some(NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 17, 789))); + /// assert_eq!(dt.with_second(60), None); + /// ~~~~ + #[inline] + fn with_second(&self, sec: u32) -> Option<NaiveDateTime> { + self.time.with_second(sec).map(|t| NaiveDateTime { time: t, ..*self }) + } + + /// Makes a new `NaiveDateTime` with nanoseconds since the whole non-leap second changed. + /// + /// Returns `None` when the resulting `NaiveDateTime` would be invalid. + /// As with the [`nanosecond`](#method.nanosecond) method, + /// the input range can exceed 1,000,000,000 for leap seconds. + /// + /// See also the + /// [`NaiveTime::with_nanosecond`](./struct.NaiveTime.html#method.with_nanosecond) + /// method. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Timelike}; + /// + /// let dt: NaiveDateTime = NaiveDate::from_ymd(2015, 9, 8).and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.with_nanosecond(333_333_333), + /// Some(NaiveDate::from_ymd(2015, 9, 8).and_hms_nano(12, 34, 56, 333_333_333))); + /// assert_eq!(dt.with_nanosecond(1_333_333_333), // leap second + /// Some(NaiveDate::from_ymd(2015, 9, 8).and_hms_nano(12, 34, 56, 1_333_333_333))); + /// assert_eq!(dt.with_nanosecond(2_000_000_000), None); + /// ~~~~ + #[inline] + fn with_nanosecond(&self, nano: u32) -> Option<NaiveDateTime> { + self.time.with_nanosecond(nano).map(|t| NaiveDateTime { time: t, ..*self }) + } +} + +/// `NaiveDateTime` can be used as a key to the hash maps (in principle). +/// +/// Practically this also takes account of fractional seconds, so it is not recommended. +/// (For the obvious reason this also distinguishes leap seconds from non-leap seconds.) +impl hash::Hash for NaiveDateTime { + fn hash<H: hash::Hasher>(&self, state: &mut H) { + self.date.hash(state); + self.time.hash(state); + } +} + +/// An addition of `Duration` to `NaiveDateTime` yields another `NaiveDateTime`. +/// +/// As a part of Chrono's [leap second handling](./struct.NaiveTime.html#leap-second-handling), +/// the addition assumes that **there is no leap second ever**, +/// except when the `NaiveDateTime` itself represents a leap second +/// in which case the assumption becomes that **there is exactly a single leap second ever**. +/// +/// Panics on underflow or overflow. +/// Use [`NaiveDateTime::checked_add_signed`](#method.checked_add_signed) to detect that. +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveDate}; +/// +/// let from_ymd = NaiveDate::from_ymd; +/// +/// let d = from_ymd(2016, 7, 8); +/// let hms = |h, m, s| d.and_hms(h, m, s); +/// assert_eq!(hms(3, 5, 7) + Duration::zero(), hms(3, 5, 7)); +/// assert_eq!(hms(3, 5, 7) + Duration::seconds(1), hms(3, 5, 8)); +/// assert_eq!(hms(3, 5, 7) + Duration::seconds(-1), hms(3, 5, 6)); +/// assert_eq!(hms(3, 5, 7) + Duration::seconds(3600 + 60), hms(4, 6, 7)); +/// assert_eq!(hms(3, 5, 7) + Duration::seconds(86_400), +/// from_ymd(2016, 7, 9).and_hms(3, 5, 7)); +/// assert_eq!(hms(3, 5, 7) + Duration::days(365), +/// from_ymd(2017, 7, 8).and_hms(3, 5, 7)); +/// +/// let hmsm = |h, m, s, milli| d.and_hms_milli(h, m, s, milli); +/// assert_eq!(hmsm(3, 5, 7, 980) + Duration::milliseconds(450), hmsm(3, 5, 8, 430)); +/// # } +/// ~~~~ +/// +/// Leap seconds are handled, +/// but the addition assumes that it is the only leap second happened. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveDate}; +/// # let from_ymd = NaiveDate::from_ymd; +/// # let hmsm = |h, m, s, milli| from_ymd(2016, 7, 8).and_hms_milli(h, m, s, milli); +/// let leap = hmsm(3, 5, 59, 1_300); +/// assert_eq!(leap + Duration::zero(), hmsm(3, 5, 59, 1_300)); +/// assert_eq!(leap + Duration::milliseconds(-500), hmsm(3, 5, 59, 800)); +/// assert_eq!(leap + Duration::milliseconds(500), hmsm(3, 5, 59, 1_800)); +/// assert_eq!(leap + Duration::milliseconds(800), hmsm(3, 6, 0, 100)); +/// assert_eq!(leap + Duration::seconds(10), hmsm(3, 6, 9, 300)); +/// assert_eq!(leap + Duration::seconds(-10), hmsm(3, 5, 50, 300)); +/// assert_eq!(leap + Duration::days(1), +/// from_ymd(2016, 7, 9).and_hms_milli(3, 5, 59, 300)); +/// # } +/// ~~~~ +impl Add<OldDuration> for NaiveDateTime { + type Output = NaiveDateTime; + + #[inline] + fn add(self, rhs: OldDuration) -> NaiveDateTime { + self.checked_add_signed(rhs).expect("`NaiveDateTime + Duration` overflowed") + } +} + +impl AddAssign<OldDuration> for NaiveDateTime { + #[inline] + fn add_assign(&mut self, rhs: OldDuration) { + *self = self.add(rhs); + } +} + +/// A subtraction of `Duration` from `NaiveDateTime` yields another `NaiveDateTime`. +/// It is the same as the addition with a negated `Duration`. +/// +/// As a part of Chrono's [leap second handling](./struct.NaiveTime.html#leap-second-handling), +/// the addition assumes that **there is no leap second ever**, +/// except when the `NaiveDateTime` itself represents a leap second +/// in which case the assumption becomes that **there is exactly a single leap second ever**. +/// +/// Panics on underflow or overflow. +/// Use [`NaiveDateTime::checked_sub_signed`](#method.checked_sub_signed) to detect that. +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveDate}; +/// +/// let from_ymd = NaiveDate::from_ymd; +/// +/// let d = from_ymd(2016, 7, 8); +/// let hms = |h, m, s| d.and_hms(h, m, s); +/// assert_eq!(hms(3, 5, 7) - Duration::zero(), hms(3, 5, 7)); +/// assert_eq!(hms(3, 5, 7) - Duration::seconds(1), hms(3, 5, 6)); +/// assert_eq!(hms(3, 5, 7) - Duration::seconds(-1), hms(3, 5, 8)); +/// assert_eq!(hms(3, 5, 7) - Duration::seconds(3600 + 60), hms(2, 4, 7)); +/// assert_eq!(hms(3, 5, 7) - Duration::seconds(86_400), +/// from_ymd(2016, 7, 7).and_hms(3, 5, 7)); +/// assert_eq!(hms(3, 5, 7) - Duration::days(365), +/// from_ymd(2015, 7, 9).and_hms(3, 5, 7)); +/// +/// let hmsm = |h, m, s, milli| d.and_hms_milli(h, m, s, milli); +/// assert_eq!(hmsm(3, 5, 7, 450) - Duration::milliseconds(670), hmsm(3, 5, 6, 780)); +/// # } +/// ~~~~ +/// +/// Leap seconds are handled, +/// but the subtraction assumes that it is the only leap second happened. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveDate}; +/// # let from_ymd = NaiveDate::from_ymd; +/// # let hmsm = |h, m, s, milli| from_ymd(2016, 7, 8).and_hms_milli(h, m, s, milli); +/// let leap = hmsm(3, 5, 59, 1_300); +/// assert_eq!(leap - Duration::zero(), hmsm(3, 5, 59, 1_300)); +/// assert_eq!(leap - Duration::milliseconds(200), hmsm(3, 5, 59, 1_100)); +/// assert_eq!(leap - Duration::milliseconds(500), hmsm(3, 5, 59, 800)); +/// assert_eq!(leap - Duration::seconds(60), hmsm(3, 5, 0, 300)); +/// assert_eq!(leap - Duration::days(1), +/// from_ymd(2016, 7, 7).and_hms_milli(3, 6, 0, 300)); +/// # } +/// ~~~~ +impl Sub<OldDuration> for NaiveDateTime { + type Output = NaiveDateTime; + + #[inline] + fn sub(self, rhs: OldDuration) -> NaiveDateTime { + self.checked_sub_signed(rhs).expect("`NaiveDateTime - Duration` overflowed") + } +} + +impl SubAssign<OldDuration> for NaiveDateTime { + #[inline] + fn sub_assign(&mut self, rhs: OldDuration) { + *self = self.sub(rhs); + } +} + +/// Subtracts another `NaiveDateTime` from the current date and time. +/// This does not overflow or underflow at all. +/// +/// As a part of Chrono's [leap second handling](./struct.NaiveTime.html#leap-second-handling), +/// the subtraction assumes that **there is no leap second ever**, +/// except when any of the `NaiveDateTime`s themselves represents a leap second +/// in which case the assumption becomes that +/// **there are exactly one (or two) leap second(s) ever**. +/// +/// The implementation is a wrapper around +/// [`NaiveDateTime::signed_duration_since`](#method.signed_duration_since). +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveDate}; +/// +/// let from_ymd = NaiveDate::from_ymd; +/// +/// let d = from_ymd(2016, 7, 8); +/// assert_eq!(d.and_hms(3, 5, 7) - d.and_hms(2, 4, 6), Duration::seconds(3600 + 60 + 1)); +/// +/// // July 8 is 190th day in the year 2016 +/// let d0 = from_ymd(2016, 1, 1); +/// assert_eq!(d.and_hms_milli(0, 7, 6, 500) - d0.and_hms(0, 0, 0), +/// Duration::seconds(189 * 86_400 + 7 * 60 + 6) + Duration::milliseconds(500)); +/// # } +/// ~~~~ +/// +/// Leap seconds are handled, but the subtraction assumes that +/// there were no other leap seconds happened. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveDate}; +/// # let from_ymd = NaiveDate::from_ymd; +/// let leap = from_ymd(2015, 6, 30).and_hms_milli(23, 59, 59, 1_500); +/// assert_eq!(leap - from_ymd(2015, 6, 30).and_hms(23, 0, 0), +/// Duration::seconds(3600) + Duration::milliseconds(500)); +/// assert_eq!(from_ymd(2015, 7, 1).and_hms(1, 0, 0) - leap, +/// Duration::seconds(3600) - Duration::milliseconds(500)); +/// # } +/// ~~~~ +impl Sub<NaiveDateTime> for NaiveDateTime { + type Output = OldDuration; + + #[inline] + fn sub(self, rhs: NaiveDateTime) -> OldDuration { + self.signed_duration_since(rhs) + } +} + +/// The `Debug` output of the naive date and time `dt` is the same as +/// [`dt.format("%Y-%m-%dT%H:%M:%S%.f")`](../format/strftime/index.html). +/// +/// The string printed can be readily parsed via the `parse` method on `str`. +/// +/// It should be noted that, for leap seconds not on the minute boundary, +/// it may print a representation not distinguishable from non-leap seconds. +/// This doesn't matter in practice, since such leap seconds never happened. +/// (By the time of the first leap second on 1972-06-30, +/// every time zone offset around the world has standardized to the 5-minute alignment.) +/// +/// # Example +/// +/// ~~~~ +/// use chrono::NaiveDate; +/// +/// let dt = NaiveDate::from_ymd(2016, 11, 15).and_hms(7, 39, 24); +/// assert_eq!(format!("{:?}", dt), "2016-11-15T07:39:24"); +/// ~~~~ +/// +/// Leap seconds may also be used. +/// +/// ~~~~ +/// # use chrono::NaiveDate; +/// let dt = NaiveDate::from_ymd(2015, 6, 30).and_hms_milli(23, 59, 59, 1_500); +/// assert_eq!(format!("{:?}", dt), "2015-06-30T23:59:60.500"); +/// ~~~~ +impl fmt::Debug for NaiveDateTime { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{:?}T{:?}", self.date, self.time) + } +} + +/// The `Display` output of the naive date and time `dt` is the same as +/// [`dt.format("%Y-%m-%d %H:%M:%S%.f")`](../format/strftime/index.html). +/// +/// It should be noted that, for leap seconds not on the minute boundary, +/// it may print a representation not distinguishable from non-leap seconds. +/// This doesn't matter in practice, since such leap seconds never happened. +/// (By the time of the first leap second on 1972-06-30, +/// every time zone offset around the world has standardized to the 5-minute alignment.) +/// +/// # Example +/// +/// ~~~~ +/// use chrono::NaiveDate; +/// +/// let dt = NaiveDate::from_ymd(2016, 11, 15).and_hms(7, 39, 24); +/// assert_eq!(format!("{}", dt), "2016-11-15 07:39:24"); +/// ~~~~ +/// +/// Leap seconds may also be used. +/// +/// ~~~~ +/// # use chrono::NaiveDate; +/// let dt = NaiveDate::from_ymd(2015, 6, 30).and_hms_milli(23, 59, 59, 1_500); +/// assert_eq!(format!("{}", dt), "2015-06-30 23:59:60.500"); +/// ~~~~ +impl fmt::Display for NaiveDateTime { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{} {}", self.date, self.time) + } +} + +/// Parsing a `str` into a `NaiveDateTime` uses the same format, +/// [`%Y-%m-%dT%H:%M:%S%.f`](../format/strftime/index.html), as in `Debug`. +/// +/// # Example +/// +/// ~~~~ +/// use chrono::{NaiveDateTime, NaiveDate}; +/// +/// let dt = NaiveDate::from_ymd(2015, 9, 18).and_hms(23, 56, 4); +/// assert_eq!("2015-09-18T23:56:04".parse::<NaiveDateTime>(), Ok(dt)); +/// +/// let dt = NaiveDate::from_ymd(12345, 6, 7).and_hms_milli(7, 59, 59, 1_500); // leap second +/// assert_eq!("+12345-6-7T7:59:60.5".parse::<NaiveDateTime>(), Ok(dt)); +/// +/// assert!("foo".parse::<NaiveDateTime>().is_err()); +/// ~~~~ +impl str::FromStr for NaiveDateTime { + type Err = ParseError; + + fn from_str(s: &str) -> ParseResult<NaiveDateTime> { + const ITEMS: &'static [Item<'static>] = &[ + Item::Numeric(Numeric::Year, Pad::Zero), + Item::Space(""), + Item::Literal("-"), + Item::Numeric(Numeric::Month, Pad::Zero), + Item::Space(""), + Item::Literal("-"), + Item::Numeric(Numeric::Day, Pad::Zero), + Item::Space(""), + Item::Literal("T"), // XXX shouldn't this be case-insensitive? + Item::Numeric(Numeric::Hour, Pad::Zero), + Item::Space(""), + Item::Literal(":"), + Item::Numeric(Numeric::Minute, Pad::Zero), + Item::Space(""), + Item::Literal(":"), + Item::Numeric(Numeric::Second, Pad::Zero), + Item::Fixed(Fixed::Nanosecond), + Item::Space(""), + ]; + + let mut parsed = Parsed::new(); + parse(&mut parsed, s, ITEMS.iter())?; + parsed.to_naive_datetime_with_offset(0) + } +} + +#[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] +fn test_encodable_json<F, E>(to_string: F) +where + F: Fn(&NaiveDateTime) -> Result<String, E>, + E: ::std::fmt::Debug, +{ + use naive::{MAX_DATE, MIN_DATE}; + + assert_eq!( + to_string(&NaiveDate::from_ymd(2016, 7, 8).and_hms_milli(9, 10, 48, 90)).ok(), + Some(r#""2016-07-08T09:10:48.090""#.into()) + ); + assert_eq!( + to_string(&NaiveDate::from_ymd(2014, 7, 24).and_hms(12, 34, 6)).ok(), + Some(r#""2014-07-24T12:34:06""#.into()) + ); + assert_eq!( + to_string(&NaiveDate::from_ymd(0, 1, 1).and_hms_milli(0, 0, 59, 1_000)).ok(), + Some(r#""0000-01-01T00:00:60""#.into()) + ); + assert_eq!( + to_string(&NaiveDate::from_ymd(-1, 12, 31).and_hms_nano(23, 59, 59, 7)).ok(), + Some(r#""-0001-12-31T23:59:59.000000007""#.into()) + ); + assert_eq!( + to_string(&MIN_DATE.and_hms(0, 0, 0)).ok(), + Some(r#""-262144-01-01T00:00:00""#.into()) + ); + assert_eq!( + to_string(&MAX_DATE.and_hms_nano(23, 59, 59, 1_999_999_999)).ok(), + Some(r#""+262143-12-31T23:59:60.999999999""#.into()) + ); +} + +#[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] +fn test_decodable_json<F, E>(from_str: F) +where + F: Fn(&str) -> Result<NaiveDateTime, E>, + E: ::std::fmt::Debug, +{ + use naive::{MAX_DATE, MIN_DATE}; + + assert_eq!( + from_str(r#""2016-07-08T09:10:48.090""#).ok(), + Some(NaiveDate::from_ymd(2016, 7, 8).and_hms_milli(9, 10, 48, 90)) + ); + assert_eq!( + from_str(r#""2016-7-8T9:10:48.09""#).ok(), + Some(NaiveDate::from_ymd(2016, 7, 8).and_hms_milli(9, 10, 48, 90)) + ); + assert_eq!( + from_str(r#""2014-07-24T12:34:06""#).ok(), + Some(NaiveDate::from_ymd(2014, 7, 24).and_hms(12, 34, 6)) + ); + assert_eq!( + from_str(r#""0000-01-01T00:00:60""#).ok(), + Some(NaiveDate::from_ymd(0, 1, 1).and_hms_milli(0, 0, 59, 1_000)) + ); + assert_eq!( + from_str(r#""0-1-1T0:0:60""#).ok(), + Some(NaiveDate::from_ymd(0, 1, 1).and_hms_milli(0, 0, 59, 1_000)) + ); + assert_eq!( + from_str(r#""-0001-12-31T23:59:59.000000007""#).ok(), + Some(NaiveDate::from_ymd(-1, 12, 31).and_hms_nano(23, 59, 59, 7)) + ); + assert_eq!(from_str(r#""-262144-01-01T00:00:00""#).ok(), Some(MIN_DATE.and_hms(0, 0, 0))); + assert_eq!( + from_str(r#""+262143-12-31T23:59:60.999999999""#).ok(), + Some(MAX_DATE.and_hms_nano(23, 59, 59, 1_999_999_999)) + ); + assert_eq!( + from_str(r#""+262143-12-31T23:59:60.9999999999997""#).ok(), // excess digits are ignored + Some(MAX_DATE.and_hms_nano(23, 59, 59, 1_999_999_999)) + ); + + // bad formats + assert!(from_str(r#""""#).is_err()); + assert!(from_str(r#""2016-07-08""#).is_err()); + assert!(from_str(r#""09:10:48.090""#).is_err()); + assert!(from_str(r#""20160708T091048.090""#).is_err()); + assert!(from_str(r#""2000-00-00T00:00:00""#).is_err()); + assert!(from_str(r#""2000-02-30T00:00:00""#).is_err()); + assert!(from_str(r#""2001-02-29T00:00:00""#).is_err()); + assert!(from_str(r#""2002-02-28T24:00:00""#).is_err()); + assert!(from_str(r#""2002-02-28T23:60:00""#).is_err()); + assert!(from_str(r#""2002-02-28T23:59:61""#).is_err()); + assert!(from_str(r#""2016-07-08T09:10:48,090""#).is_err()); + assert!(from_str(r#""2016-07-08 09:10:48.090""#).is_err()); + assert!(from_str(r#""2016-007-08T09:10:48.090""#).is_err()); + assert!(from_str(r#""yyyy-mm-ddThh:mm:ss.fffffffff""#).is_err()); + assert!(from_str(r#"20160708000000"#).is_err()); + assert!(from_str(r#"{}"#).is_err()); + // pre-0.3.0 rustc-serialize format is now invalid + assert!(from_str(r#"{"date":{"ymdf":20},"time":{"secs":0,"frac":0}}"#).is_err()); + assert!(from_str(r#"null"#).is_err()); +} + +#[cfg(all(test, feature = "rustc-serialize"))] +fn test_decodable_json_timestamp<F, E>(from_str: F) +where + F: Fn(&str) -> Result<rustc_serialize::TsSeconds, E>, + E: ::std::fmt::Debug, +{ + assert_eq!( + *from_str("0").unwrap(), + NaiveDate::from_ymd(1970, 1, 1).and_hms(0, 0, 0), + "should parse integers as timestamps" + ); + assert_eq!( + *from_str("-1").unwrap(), + NaiveDate::from_ymd(1969, 12, 31).and_hms(23, 59, 59), + "should parse integers as timestamps" + ); +} + +#[cfg(feature = "rustc-serialize")] +pub mod rustc_serialize { + use super::NaiveDateTime; + use rustc_serialize::{Decodable, Decoder, Encodable, Encoder}; + use std::ops::Deref; + + impl Encodable for NaiveDateTime { + fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { + format!("{:?}", self).encode(s) + } + } + + impl Decodable for NaiveDateTime { + fn decode<D: Decoder>(d: &mut D) -> Result<NaiveDateTime, D::Error> { + d.read_str()?.parse().map_err(|_| d.error("invalid date time string")) + } + } + + /// A `DateTime` that can be deserialized from a seconds-based timestamp + #[derive(Debug)] + #[deprecated( + since = "1.4.2", + note = "RustcSerialize will be removed before chrono 1.0, use Serde instead" + )] + pub struct TsSeconds(NaiveDateTime); + + #[allow(deprecated)] + impl From<TsSeconds> for NaiveDateTime { + /// Pull the internal NaiveDateTime out + #[allow(deprecated)] + fn from(obj: TsSeconds) -> NaiveDateTime { + obj.0 + } + } + + #[allow(deprecated)] + impl Deref for TsSeconds { + type Target = NaiveDateTime; + + #[allow(deprecated)] + fn deref(&self) -> &Self::Target { + &self.0 + } + } + + #[allow(deprecated)] + impl Decodable for TsSeconds { + #[allow(deprecated)] + fn decode<D: Decoder>(d: &mut D) -> Result<TsSeconds, D::Error> { + Ok(TsSeconds( + NaiveDateTime::from_timestamp_opt(d.read_i64()?, 0) + .ok_or_else(|| d.error("invalid timestamp"))?, + )) + } + } + + #[cfg(test)] + use rustc_serialize::json; + + #[test] + fn test_encodable() { + super::test_encodable_json(json::encode); + } + + #[test] + fn test_decodable() { + super::test_decodable_json(json::decode); + } + + #[test] + fn test_decodable_timestamps() { + super::test_decodable_json_timestamp(json::decode); + } +} + +/// Tools to help serializing/deserializing `NaiveDateTime`s +#[cfg(feature = "serde")] +pub mod serde { + use super::NaiveDateTime; + use core::fmt; + use serdelib::{de, ser}; + + /// Serialize a `NaiveDateTime` as an RFC 3339 string + /// + /// See [the `serde` module](./serde/index.html) for alternate + /// serialization formats. + impl ser::Serialize for NaiveDateTime { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: ser::Serializer, + { + struct FormatWrapped<'a, D: 'a> { + inner: &'a D, + } + + impl<'a, D: fmt::Debug> fmt::Display for FormatWrapped<'a, D> { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + self.inner.fmt(f) + } + } + + serializer.collect_str(&FormatWrapped { inner: &self }) + } + } + + struct NaiveDateTimeVisitor; + + impl<'de> de::Visitor<'de> for NaiveDateTimeVisitor { + type Value = NaiveDateTime; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + write!(formatter, "a formatted date and time string") + } + + fn visit_str<E>(self, value: &str) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + value.parse().map_err(E::custom) + } + } + + impl<'de> de::Deserialize<'de> for NaiveDateTime { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: de::Deserializer<'de>, + { + deserializer.deserialize_str(NaiveDateTimeVisitor) + } + } + + /// Used to serialize/deserialize from nanosecond-precision timestamps + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # extern crate serde_json; + /// # extern crate serde; + /// # extern crate chrono; + /// # use chrono::{TimeZone, NaiveDate, NaiveDateTime, Utc}; + /// use chrono::naive::serde::ts_nanoseconds; + /// #[derive(Deserialize, Serialize)] + /// struct S { + /// #[serde(with = "ts_nanoseconds")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<S, serde_json::Error> { + /// let time = NaiveDate::from_ymd(2018, 5, 17).and_hms_nano(02, 04, 59, 918355733); + /// let my_s = S { + /// time: time.clone(), + /// }; + /// + /// let as_string = serde_json::to_string(&my_s)?; + /// assert_eq!(as_string, r#"{"time":1526522699918355733}"#); + /// let my_s: S = serde_json::from_str(&as_string)?; + /// assert_eq!(my_s.time, time); + /// # Ok(my_s) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub mod ts_nanoseconds { + use core::fmt; + use serdelib::{de, ser}; + + use {ne_timestamp, NaiveDateTime}; + + /// Serialize a UTC datetime into an integer number of nanoseconds since the epoch + /// + /// Intended for use with `serde`s `serialize_with` attribute. + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # #[macro_use] extern crate serde_json; + /// # #[macro_use] extern crate serde; + /// # extern crate chrono; + /// # use chrono::{TimeZone, NaiveDate, NaiveDateTime, Utc}; + /// # use serde::Serialize; + /// use chrono::naive::serde::ts_nanoseconds::serialize as to_nano_ts; + /// #[derive(Serialize)] + /// struct S { + /// #[serde(serialize_with = "to_nano_ts")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<String, serde_json::Error> { + /// let my_s = S { + /// time: NaiveDate::from_ymd(2018, 5, 17).and_hms_nano(02, 04, 59, 918355733), + /// }; + /// let as_string = serde_json::to_string(&my_s)?; + /// assert_eq!(as_string, r#"{"time":1526522699918355733}"#); + /// # Ok(as_string) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub fn serialize<S>(dt: &NaiveDateTime, serializer: S) -> Result<S::Ok, S::Error> + where + S: ser::Serializer, + { + serializer.serialize_i64(dt.timestamp_nanos()) + } + + /// Deserialize a `DateTime` from a nanoseconds timestamp + /// + /// Intended for use with `serde`s `deserialize_with` attribute. + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # #[macro_use] extern crate serde_json; + /// # extern crate serde; + /// # extern crate chrono; + /// # use chrono::{NaiveDateTime, Utc}; + /// # use serde::Deserialize; + /// use chrono::naive::serde::ts_nanoseconds::deserialize as from_nano_ts; + /// #[derive(Deserialize)] + /// struct S { + /// #[serde(deserialize_with = "from_nano_ts")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<S, serde_json::Error> { + /// let my_s: S = serde_json::from_str(r#"{ "time": 1526522699918355733 }"#)?; + /// # Ok(my_s) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub fn deserialize<'de, D>(d: D) -> Result<NaiveDateTime, D::Error> + where + D: de::Deserializer<'de>, + { + Ok(d.deserialize_i64(NaiveDateTimeFromNanoSecondsVisitor)?) + } + + struct NaiveDateTimeFromNanoSecondsVisitor; + + impl<'de> de::Visitor<'de> for NaiveDateTimeFromNanoSecondsVisitor { + type Value = NaiveDateTime; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + formatter.write_str("a unix timestamp") + } + + fn visit_i64<E>(self, value: i64) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + NaiveDateTime::from_timestamp_opt( + value / 1_000_000_000, + (value % 1_000_000_000) as u32, + ) + .ok_or_else(|| E::custom(ne_timestamp(value))) + } + + fn visit_u64<E>(self, value: u64) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + NaiveDateTime::from_timestamp_opt( + value as i64 / 1_000_000_000, + (value as i64 % 1_000_000_000) as u32, + ) + .ok_or_else(|| E::custom(ne_timestamp(value))) + } + } + } + + /// Used to serialize/deserialize from millisecond-precision timestamps + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # extern crate serde_json; + /// # extern crate serde; + /// # extern crate chrono; + /// # use chrono::{TimeZone, NaiveDate, NaiveDateTime, Utc}; + /// use chrono::naive::serde::ts_milliseconds; + /// #[derive(Deserialize, Serialize)] + /// struct S { + /// #[serde(with = "ts_milliseconds")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<S, serde_json::Error> { + /// let time = NaiveDate::from_ymd(2018, 5, 17).and_hms_milli(02, 04, 59, 918); + /// let my_s = S { + /// time: time.clone(), + /// }; + /// + /// let as_string = serde_json::to_string(&my_s)?; + /// assert_eq!(as_string, r#"{"time":1526522699918}"#); + /// let my_s: S = serde_json::from_str(&as_string)?; + /// assert_eq!(my_s.time, time); + /// # Ok(my_s) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub mod ts_milliseconds { + use core::fmt; + use serdelib::{de, ser}; + + use {ne_timestamp, NaiveDateTime}; + + /// Serialize a UTC datetime into an integer number of milliseconds since the epoch + /// + /// Intended for use with `serde`s `serialize_with` attribute. + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # #[macro_use] extern crate serde_json; + /// # #[macro_use] extern crate serde; + /// # extern crate chrono; + /// # use chrono::{TimeZone, NaiveDate, NaiveDateTime, Utc}; + /// # use serde::Serialize; + /// use chrono::naive::serde::ts_milliseconds::serialize as to_milli_ts; + /// #[derive(Serialize)] + /// struct S { + /// #[serde(serialize_with = "to_milli_ts")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<String, serde_json::Error> { + /// let my_s = S { + /// time: NaiveDate::from_ymd(2018, 5, 17).and_hms_milli(02, 04, 59, 918), + /// }; + /// let as_string = serde_json::to_string(&my_s)?; + /// assert_eq!(as_string, r#"{"time":1526522699918}"#); + /// # Ok(as_string) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub fn serialize<S>(dt: &NaiveDateTime, serializer: S) -> Result<S::Ok, S::Error> + where + S: ser::Serializer, + { + serializer.serialize_i64(dt.timestamp_millis()) + } + + /// Deserialize a `DateTime` from a milliseconds timestamp + /// + /// Intended for use with `serde`s `deserialize_with` attribute. + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # #[macro_use] extern crate serde_json; + /// # extern crate serde; + /// # extern crate chrono; + /// # use chrono::{NaiveDateTime, Utc}; + /// # use serde::Deserialize; + /// use chrono::naive::serde::ts_milliseconds::deserialize as from_milli_ts; + /// #[derive(Deserialize)] + /// struct S { + /// #[serde(deserialize_with = "from_milli_ts")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<S, serde_json::Error> { + /// let my_s: S = serde_json::from_str(r#"{ "time": 1526522699918 }"#)?; + /// # Ok(my_s) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub fn deserialize<'de, D>(d: D) -> Result<NaiveDateTime, D::Error> + where + D: de::Deserializer<'de>, + { + Ok(d.deserialize_i64(NaiveDateTimeFromMilliSecondsVisitor)?) + } + + struct NaiveDateTimeFromMilliSecondsVisitor; + + impl<'de> de::Visitor<'de> for NaiveDateTimeFromMilliSecondsVisitor { + type Value = NaiveDateTime; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + formatter.write_str("a unix timestamp") + } + + fn visit_i64<E>(self, value: i64) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + NaiveDateTime::from_timestamp_opt(value / 1000, ((value % 1000) * 1_000_000) as u32) + .ok_or_else(|| E::custom(ne_timestamp(value))) + } + + fn visit_u64<E>(self, value: u64) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + NaiveDateTime::from_timestamp_opt( + (value / 1000) as i64, + ((value % 1000) * 1_000_000) as u32, + ) + .ok_or_else(|| E::custom(ne_timestamp(value))) + } + } + } + + /// Used to serialize/deserialize from second-precision timestamps + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # extern crate serde_json; + /// # extern crate serde; + /// # extern crate chrono; + /// # use chrono::{TimeZone, NaiveDate, NaiveDateTime, Utc}; + /// use chrono::naive::serde::ts_seconds; + /// #[derive(Deserialize, Serialize)] + /// struct S { + /// #[serde(with = "ts_seconds")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<S, serde_json::Error> { + /// let time = NaiveDate::from_ymd(2015, 5, 15).and_hms(10, 0, 0); + /// let my_s = S { + /// time: time.clone(), + /// }; + /// + /// let as_string = serde_json::to_string(&my_s)?; + /// assert_eq!(as_string, r#"{"time":1431684000}"#); + /// let my_s: S = serde_json::from_str(&as_string)?; + /// assert_eq!(my_s.time, time); + /// # Ok(my_s) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub mod ts_seconds { + use core::fmt; + use serdelib::{de, ser}; + + use {ne_timestamp, NaiveDateTime}; + + /// Serialize a UTC datetime into an integer number of seconds since the epoch + /// + /// Intended for use with `serde`s `serialize_with` attribute. + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # #[macro_use] extern crate serde_json; + /// # #[macro_use] extern crate serde; + /// # extern crate chrono; + /// # use chrono::{TimeZone, NaiveDate, NaiveDateTime, Utc}; + /// # use serde::Serialize; + /// use chrono::naive::serde::ts_seconds::serialize as to_ts; + /// #[derive(Serialize)] + /// struct S { + /// #[serde(serialize_with = "to_ts")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<String, serde_json::Error> { + /// let my_s = S { + /// time: NaiveDate::from_ymd(2015, 5, 15).and_hms(10, 0, 0), + /// }; + /// let as_string = serde_json::to_string(&my_s)?; + /// assert_eq!(as_string, r#"{"time":1431684000}"#); + /// # Ok(as_string) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub fn serialize<S>(dt: &NaiveDateTime, serializer: S) -> Result<S::Ok, S::Error> + where + S: ser::Serializer, + { + serializer.serialize_i64(dt.timestamp()) + } + + /// Deserialize a `DateTime` from a seconds timestamp + /// + /// Intended for use with `serde`s `deserialize_with` attribute. + /// + /// # Example: + /// + /// ```rust + /// # // We mark this ignored so that we can test on 1.13 (which does not + /// # // support custom derive), and run tests with --ignored on beta and + /// # // nightly to actually trigger these. + /// # + /// # #[macro_use] extern crate serde_derive; + /// # #[macro_use] extern crate serde_json; + /// # extern crate serde; + /// # extern crate chrono; + /// # use chrono::{NaiveDateTime, Utc}; + /// # use serde::Deserialize; + /// use chrono::naive::serde::ts_seconds::deserialize as from_ts; + /// #[derive(Deserialize)] + /// struct S { + /// #[serde(deserialize_with = "from_ts")] + /// time: NaiveDateTime + /// } + /// + /// # fn example() -> Result<S, serde_json::Error> { + /// let my_s: S = serde_json::from_str(r#"{ "time": 1431684000 }"#)?; + /// # Ok(my_s) + /// # } + /// # fn main() { example().unwrap(); } + /// ``` + pub fn deserialize<'de, D>(d: D) -> Result<NaiveDateTime, D::Error> + where + D: de::Deserializer<'de>, + { + Ok(d.deserialize_i64(NaiveDateTimeFromSecondsVisitor)?) + } + + struct NaiveDateTimeFromSecondsVisitor; + + impl<'de> de::Visitor<'de> for NaiveDateTimeFromSecondsVisitor { + type Value = NaiveDateTime; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + formatter.write_str("a unix timestamp") + } + + fn visit_i64<E>(self, value: i64) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + NaiveDateTime::from_timestamp_opt(value, 0) + .ok_or_else(|| E::custom(ne_timestamp(value))) + } + + fn visit_u64<E>(self, value: u64) -> Result<NaiveDateTime, E> + where + E: de::Error, + { + NaiveDateTime::from_timestamp_opt(value as i64, 0) + .ok_or_else(|| E::custom(ne_timestamp(value))) + } + } + } + + #[cfg(test)] + extern crate bincode; + #[cfg(test)] + extern crate serde_derive; + #[cfg(test)] + extern crate serde_json; + + #[test] + fn test_serde_serialize() { + super::test_encodable_json(self::serde_json::to_string); + } + + #[test] + fn test_serde_deserialize() { + super::test_decodable_json(|input| self::serde_json::from_str(&input)); + } + + // Bincode is relevant to test separately from JSON because + // it is not self-describing. + #[test] + fn test_serde_bincode() { + use self::bincode::{deserialize, serialize, Infinite}; + use naive::NaiveDate; + + let dt = NaiveDate::from_ymd(2016, 7, 8).and_hms_milli(9, 10, 48, 90); + let encoded = serialize(&dt, Infinite).unwrap(); + let decoded: NaiveDateTime = deserialize(&encoded).unwrap(); + assert_eq!(dt, decoded); + } + + #[test] + fn test_serde_bincode_optional() { + use self::bincode::{deserialize, serialize, Infinite}; + use self::serde_derive::{Deserialize, Serialize}; + use prelude::*; + use serde::ts_nanoseconds_option; + + #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)] + struct Test { + one: Option<i64>, + #[serde(with = "ts_nanoseconds_option")] + two: Option<DateTime<Utc>>, + } + + let expected = Test { one: Some(1), two: Some(Utc.ymd(1970, 1, 1).and_hms(0, 1, 1)) }; + let bytes: Vec<u8> = serialize(&expected, Infinite).unwrap(); + let actual = deserialize::<Test>(&(bytes)).unwrap(); + + assert_eq!(expected, actual); + } +} + +#[cfg(test)] +mod tests { + use super::NaiveDateTime; + use naive::{NaiveDate, MAX_DATE, MIN_DATE}; + use oldtime::Duration; + use std::i64; + use Datelike; + + #[test] + fn test_datetime_from_timestamp() { + let from_timestamp = |secs| NaiveDateTime::from_timestamp_opt(secs, 0); + let ymdhms = |y, m, d, h, n, s| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s); + assert_eq!(from_timestamp(-1), Some(ymdhms(1969, 12, 31, 23, 59, 59))); + assert_eq!(from_timestamp(0), Some(ymdhms(1970, 1, 1, 0, 0, 0))); + assert_eq!(from_timestamp(1), Some(ymdhms(1970, 1, 1, 0, 0, 1))); + assert_eq!(from_timestamp(1_000_000_000), Some(ymdhms(2001, 9, 9, 1, 46, 40))); + assert_eq!(from_timestamp(0x7fffffff), Some(ymdhms(2038, 1, 19, 3, 14, 7))); + assert_eq!(from_timestamp(i64::MIN), None); + assert_eq!(from_timestamp(i64::MAX), None); + } + + #[test] + fn test_datetime_add() { + fn check( + (y, m, d, h, n, s): (i32, u32, u32, u32, u32, u32), + rhs: Duration, + result: Option<(i32, u32, u32, u32, u32, u32)>, + ) { + let lhs = NaiveDate::from_ymd(y, m, d).and_hms(h, n, s); + let sum = + result.map(|(y, m, d, h, n, s)| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s)); + assert_eq!(lhs.checked_add_signed(rhs), sum); + assert_eq!(lhs.checked_sub_signed(-rhs), sum); + }; + + check( + (2014, 5, 6, 7, 8, 9), + Duration::seconds(3600 + 60 + 1), + Some((2014, 5, 6, 8, 9, 10)), + ); + check( + (2014, 5, 6, 7, 8, 9), + Duration::seconds(-(3600 + 60 + 1)), + Some((2014, 5, 6, 6, 7, 8)), + ); + check((2014, 5, 6, 7, 8, 9), Duration::seconds(86399), Some((2014, 5, 7, 7, 8, 8))); + check((2014, 5, 6, 7, 8, 9), Duration::seconds(86_400 * 10), Some((2014, 5, 16, 7, 8, 9))); + check((2014, 5, 6, 7, 8, 9), Duration::seconds(-86_400 * 10), Some((2014, 4, 26, 7, 8, 9))); + check((2014, 5, 6, 7, 8, 9), Duration::seconds(86_400 * 10), Some((2014, 5, 16, 7, 8, 9))); + + // overflow check + // assumes that we have correct values for MAX/MIN_DAYS_FROM_YEAR_0 from `naive::date`. + // (they are private constants, but the equivalence is tested in that module.) + let max_days_from_year_0 = MAX_DATE.signed_duration_since(NaiveDate::from_ymd(0, 1, 1)); + check((0, 1, 1, 0, 0, 0), max_days_from_year_0, Some((MAX_DATE.year(), 12, 31, 0, 0, 0))); + check( + (0, 1, 1, 0, 0, 0), + max_days_from_year_0 + Duration::seconds(86399), + Some((MAX_DATE.year(), 12, 31, 23, 59, 59)), + ); + check((0, 1, 1, 0, 0, 0), max_days_from_year_0 + Duration::seconds(86_400), None); + check((0, 1, 1, 0, 0, 0), Duration::max_value(), None); + + let min_days_from_year_0 = MIN_DATE.signed_duration_since(NaiveDate::from_ymd(0, 1, 1)); + check((0, 1, 1, 0, 0, 0), min_days_from_year_0, Some((MIN_DATE.year(), 1, 1, 0, 0, 0))); + check((0, 1, 1, 0, 0, 0), min_days_from_year_0 - Duration::seconds(1), None); + check((0, 1, 1, 0, 0, 0), Duration::min_value(), None); + } + + #[test] + fn test_datetime_sub() { + let ymdhms = |y, m, d, h, n, s| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s); + let since = NaiveDateTime::signed_duration_since; + assert_eq!( + since(ymdhms(2014, 5, 6, 7, 8, 9), ymdhms(2014, 5, 6, 7, 8, 9)), + Duration::zero() + ); + assert_eq!( + since(ymdhms(2014, 5, 6, 7, 8, 10), ymdhms(2014, 5, 6, 7, 8, 9)), + Duration::seconds(1) + ); + assert_eq!( + since(ymdhms(2014, 5, 6, 7, 8, 9), ymdhms(2014, 5, 6, 7, 8, 10)), + Duration::seconds(-1) + ); + assert_eq!( + since(ymdhms(2014, 5, 7, 7, 8, 9), ymdhms(2014, 5, 6, 7, 8, 10)), + Duration::seconds(86399) + ); + assert_eq!( + since(ymdhms(2001, 9, 9, 1, 46, 39), ymdhms(1970, 1, 1, 0, 0, 0)), + Duration::seconds(999_999_999) + ); + } + + #[test] + fn test_datetime_addassignment() { + let ymdhms = |y, m, d, h, n, s| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s); + let mut date = ymdhms(2016, 10, 1, 10, 10, 10); + date += Duration::minutes(10_000_000); + assert_eq!(date, ymdhms(2035, 10, 6, 20, 50, 10)); + date += Duration::days(10); + assert_eq!(date, ymdhms(2035, 10, 16, 20, 50, 10)); + } + + #[test] + fn test_datetime_subassignment() { + let ymdhms = |y, m, d, h, n, s| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s); + let mut date = ymdhms(2016, 10, 1, 10, 10, 10); + date -= Duration::minutes(10_000_000); + assert_eq!(date, ymdhms(1997, 9, 26, 23, 30, 10)); + date -= Duration::days(10); + assert_eq!(date, ymdhms(1997, 9, 16, 23, 30, 10)); + } + + #[test] + fn test_datetime_timestamp() { + let to_timestamp = + |y, m, d, h, n, s| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s).timestamp(); + assert_eq!(to_timestamp(1969, 12, 31, 23, 59, 59), -1); + assert_eq!(to_timestamp(1970, 1, 1, 0, 0, 0), 0); + assert_eq!(to_timestamp(1970, 1, 1, 0, 0, 1), 1); + assert_eq!(to_timestamp(2001, 9, 9, 1, 46, 40), 1_000_000_000); + assert_eq!(to_timestamp(2038, 1, 19, 3, 14, 7), 0x7fffffff); + } + + #[test] + fn test_datetime_from_str() { + // valid cases + let valid = [ + "2015-2-18T23:16:9.15", + "-77-02-18T23:16:09", + " +82701 - 05 - 6 T 15 : 9 : 60.898989898989 ", + ]; + for &s in &valid { + let d = match s.parse::<NaiveDateTime>() { + Ok(d) => d, + Err(e) => panic!("parsing `{}` has failed: {}", s, e), + }; + let s_ = format!("{:?}", d); + // `s` and `s_` may differ, but `s.parse()` and `s_.parse()` must be same + let d_ = match s_.parse::<NaiveDateTime>() { + Ok(d) => d, + Err(e) => { + panic!("`{}` is parsed into `{:?}`, but reparsing that has failed: {}", s, d, e) + } + }; + assert!( + d == d_, + "`{}` is parsed into `{:?}`, but reparsed result \ + `{:?}` does not match", + s, + d, + d_ + ); + } + + // some invalid cases + // since `ParseErrorKind` is private, all we can do is to check if there was an error + assert!("".parse::<NaiveDateTime>().is_err()); + assert!("x".parse::<NaiveDateTime>().is_err()); + assert!("15".parse::<NaiveDateTime>().is_err()); + assert!("15:8:9".parse::<NaiveDateTime>().is_err()); + assert!("15-8-9".parse::<NaiveDateTime>().is_err()); + assert!("2015-15-15T15:15:15".parse::<NaiveDateTime>().is_err()); + assert!("2012-12-12T12:12:12x".parse::<NaiveDateTime>().is_err()); + assert!("2012-123-12T12:12:12".parse::<NaiveDateTime>().is_err()); + assert!("+ 82701-123-12T12:12:12".parse::<NaiveDateTime>().is_err()); + assert!("+802701-123-12T12:12:12".parse::<NaiveDateTime>().is_err()); // out-of-bound + } + + #[test] + fn test_datetime_parse_from_str() { + let ymdhms = |y, m, d, h, n, s| NaiveDate::from_ymd(y, m, d).and_hms(h, n, s); + let ymdhmsn = + |y, m, d, h, n, s, nano| NaiveDate::from_ymd(y, m, d).and_hms_nano(h, n, s, nano); + assert_eq!( + NaiveDateTime::parse_from_str("2014-5-7T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), + Ok(ymdhms(2014, 5, 7, 12, 34, 56)) + ); // ignore offset + assert_eq!( + NaiveDateTime::parse_from_str("2015-W06-1 000000", "%G-W%V-%u%H%M%S"), + Ok(ymdhms(2015, 2, 2, 0, 0, 0)) + ); + assert_eq!( + NaiveDateTime::parse_from_str( + "Fri, 09 Aug 2013 23:54:35 GMT", + "%a, %d %b %Y %H:%M:%S GMT" + ), + Ok(ymdhms(2013, 8, 9, 23, 54, 35)) + ); + assert!(NaiveDateTime::parse_from_str( + "Sat, 09 Aug 2013 23:54:35 GMT", + "%a, %d %b %Y %H:%M:%S GMT" + ) + .is_err()); + assert!(NaiveDateTime::parse_from_str("2014-5-7 12:3456", "%Y-%m-%d %H:%M:%S").is_err()); + assert!(NaiveDateTime::parse_from_str("12:34:56", "%H:%M:%S").is_err()); // insufficient + assert_eq!( + NaiveDateTime::parse_from_str("1441497364", "%s"), + Ok(ymdhms(2015, 9, 5, 23, 56, 4)) + ); + assert_eq!( + NaiveDateTime::parse_from_str("1283929614.1234", "%s.%f"), + Ok(ymdhmsn(2010, 9, 8, 7, 6, 54, 1234)) + ); + assert_eq!( + NaiveDateTime::parse_from_str("1441497364.649", "%s%.3f"), + Ok(ymdhmsn(2015, 9, 5, 23, 56, 4, 649000000)) + ); + assert_eq!( + NaiveDateTime::parse_from_str("1497854303.087654", "%s%.6f"), + Ok(ymdhmsn(2017, 6, 19, 6, 38, 23, 87654000)) + ); + assert_eq!( + NaiveDateTime::parse_from_str("1437742189.918273645", "%s%.9f"), + Ok(ymdhmsn(2015, 7, 24, 12, 49, 49, 918273645)) + ); + } + + #[test] + fn test_datetime_format() { + let dt = NaiveDate::from_ymd(2010, 9, 8).and_hms_milli(7, 6, 54, 321); + assert_eq!(dt.format("%c").to_string(), "Wed Sep 8 07:06:54 2010"); + assert_eq!(dt.format("%s").to_string(), "1283929614"); + assert_eq!(dt.format("%t%n%%%n%t").to_string(), "\t\n%\n\t"); + + // a horror of leap second: coming near to you. + let dt = NaiveDate::from_ymd(2012, 6, 30).and_hms_milli(23, 59, 59, 1_000); + assert_eq!(dt.format("%c").to_string(), "Sat Jun 30 23:59:60 2012"); + assert_eq!(dt.format("%s").to_string(), "1341100799"); // not 1341100800, it's intentional. + } + + #[test] + fn test_datetime_add_sub_invariant() { + // issue #37 + let base = NaiveDate::from_ymd(2000, 1, 1).and_hms(0, 0, 0); + let t = -946684799990000; + let time = base + Duration::microseconds(t); + assert_eq!(t, time.signed_duration_since(base).num_microseconds().unwrap()); + } + + #[test] + fn test_nanosecond_range() { + const A_BILLION: i64 = 1_000_000_000; + let maximum = "2262-04-11T23:47:16.854775804"; + let parsed: NaiveDateTime = maximum.parse().unwrap(); + let nanos = parsed.timestamp_nanos(); + assert_eq!( + parsed, + NaiveDateTime::from_timestamp(nanos / A_BILLION, (nanos % A_BILLION) as u32) + ); + + let minimum = "1677-09-21T00:12:44.000000000"; + let parsed: NaiveDateTime = minimum.parse().unwrap(); + let nanos = parsed.timestamp_nanos(); + assert_eq!( + parsed, + NaiveDateTime::from_timestamp(nanos / A_BILLION, (nanos % A_BILLION) as u32) + ); + } +} |