diff options
Diffstat (limited to 'third_party/rust/chrono/src/naive')
| -rw-r--r-- | third_party/rust/chrono/src/naive/date.rs | 2392 | ||||
| -rw-r--r-- | third_party/rust/chrono/src/naive/datetime.rs | 2507 | ||||
| -rw-r--r-- | third_party/rust/chrono/src/naive/internals.rs | 815 | ||||
| -rw-r--r-- | third_party/rust/chrono/src/naive/isoweek.rs | 163 | ||||
| -rw-r--r-- | third_party/rust/chrono/src/naive/time.rs | 1814 |
5 files changed, 7691 insertions, 0 deletions
diff --git a/third_party/rust/chrono/src/naive/date.rs b/third_party/rust/chrono/src/naive/date.rs new file mode 100644 index 0000000000..3e34e20741 --- /dev/null +++ b/third_party/rust/chrono/src/naive/date.rs @@ -0,0 +1,2392 @@ +// This is a part of Chrono. +// See README.md and LICENSE.txt for details. + +//! ISO 8601 calendar date without timezone. + +#[cfg(any(feature = "alloc", feature = "std", test))] +use core::borrow::Borrow; +use core::ops::{Add, AddAssign, Sub, SubAssign}; +use core::{fmt, 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::{Item, Numeric, Pad}; +use naive::{IsoWeek, NaiveDateTime, NaiveTime}; +use {Datelike, Weekday}; + +use super::internals::{self, DateImpl, Mdf, Of, YearFlags}; +use super::isoweek; + +const MAX_YEAR: i32 = internals::MAX_YEAR; +const MIN_YEAR: i32 = internals::MIN_YEAR; + +// MAX_YEAR-12-31 minus 0000-01-01 +// = ((MAX_YEAR+1)-01-01 minus 0001-01-01) + (0001-01-01 minus 0000-01-01) - 1 day +// = ((MAX_YEAR+1)-01-01 minus 0001-01-01) + 365 days +// = MAX_YEAR * 365 + (# of leap years from 0001 to MAX_YEAR) + 365 days +#[cfg(test)] // only used for testing +const MAX_DAYS_FROM_YEAR_0: i32 = + MAX_YEAR * 365 + MAX_YEAR / 4 - MAX_YEAR / 100 + MAX_YEAR / 400 + 365; + +// MIN_YEAR-01-01 minus 0000-01-01 +// = (MIN_YEAR+400n+1)-01-01 minus (400n+1)-01-01 +// = ((MIN_YEAR+400n+1)-01-01 minus 0001-01-01) - ((400n+1)-01-01 minus 0001-01-01) +// = ((MIN_YEAR+400n+1)-01-01 minus 0001-01-01) - 146097n days +// +// n is set to 1000 for convenience. +#[cfg(test)] // only used for testing +const MIN_DAYS_FROM_YEAR_0: i32 = (MIN_YEAR + 400_000) * 365 + (MIN_YEAR + 400_000) / 4 + - (MIN_YEAR + 400_000) / 100 + + (MIN_YEAR + 400_000) / 400 + - 146097_000; + +#[cfg(test)] // only used for testing, but duplicated in naive::datetime +const MAX_BITS: usize = 44; + +/// ISO 8601 calendar date without timezone. +/// Allows for every [proleptic Gregorian date](#calendar-date) +/// from Jan 1, 262145 BCE to Dec 31, 262143 CE. +/// Also supports the conversion from ISO 8601 ordinal and week date. +/// +/// # Calendar Date +/// +/// The ISO 8601 **calendar date** follows the proleptic Gregorian calendar. +/// It is like a normal civil calendar but note some slight differences: +/// +/// * Dates before the Gregorian calendar's inception in 1582 are defined via the extrapolation. +/// Be careful, as historical dates are often noted in the Julian calendar and others +/// and the transition to Gregorian may differ across countries (as late as early 20C). +/// +/// (Some example: Both Shakespeare from Britain and Cervantes from Spain seemingly died +/// on the same calendar date---April 23, 1616---but in the different calendar. +/// Britain used the Julian calendar at that time, so Shakespeare's death is later.) +/// +/// * ISO 8601 calendars has the year 0, which is 1 BCE (a year before 1 CE). +/// If you need a typical BCE/BC and CE/AD notation for year numbers, +/// use the [`Datelike::year_ce`](../trait.Datelike.html#method.year_ce) method. +/// +/// # Week Date +/// +/// The ISO 8601 **week date** is a triple of year number, week number +/// and [day of the week](../enum.Weekday.html) with the following rules: +/// +/// * A week consists of Monday through Sunday, and is always numbered within some year. +/// The week number ranges from 1 to 52 or 53 depending on the year. +/// +/// * The week 1 of given year is defined as the first week containing January 4 of that year, +/// or equivalently, the first week containing four or more days in that year. +/// +/// * The year number in the week date may *not* correspond to the actual Gregorian year. +/// For example, January 3, 2016 (Sunday) was on the last (53rd) week of 2015. +/// +/// Chrono's date types default to the ISO 8601 [calendar date](#calendar-date), +/// but [`Datelike::iso_week`](../trait.Datelike.html#tymethod.iso_week) and +/// [`Datelike::weekday`](../trait.Datelike.html#tymethod.weekday) methods +/// can be used to get the corresponding week date. +/// +/// # Ordinal Date +/// +/// The ISO 8601 **ordinal date** is a pair of year number and day of the year ("ordinal"). +/// The ordinal number ranges from 1 to 365 or 366 depending on the year. +/// The year number is the same as that of the [calendar date](#calendar-date). +/// +/// This is currently the internal format of Chrono's date types. +#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)] +pub struct NaiveDate { + ymdf: DateImpl, // (year << 13) | of +} + +/// The minimum possible `NaiveDate` (January 1, 262145 BCE). +pub const MIN_DATE: NaiveDate = NaiveDate { ymdf: (MIN_YEAR << 13) | (1 << 4) | 0o07 /*FE*/ }; +/// The maximum possible `NaiveDate` (December 31, 262143 CE). +pub const MAX_DATE: NaiveDate = NaiveDate { ymdf: (MAX_YEAR << 13) | (365 << 4) | 0o17 /*F*/ }; + +// as it is hard to verify year flags in `MIN_DATE` and `MAX_DATE`, +// we use a separate run-time test. +#[test] +fn test_date_bounds() { + let calculated_min = NaiveDate::from_ymd(MIN_YEAR, 1, 1); + let calculated_max = NaiveDate::from_ymd(MAX_YEAR, 12, 31); + assert!( + MIN_DATE == calculated_min, + "`MIN_DATE` should have a year flag {:?}", + calculated_min.of().flags() + ); + assert!( + MAX_DATE == calculated_max, + "`MAX_DATE` should have a year flag {:?}", + calculated_max.of().flags() + ); + + // let's also check that the entire range do not exceed 2^44 seconds + // (sometimes used for bounding `Duration` against overflow) + let maxsecs = MAX_DATE.signed_duration_since(MIN_DATE).num_seconds(); + let maxsecs = maxsecs + 86401; // also take care of DateTime + assert!( + maxsecs < (1 << MAX_BITS), + "The entire `NaiveDate` range somehow exceeds 2^{} seconds", + MAX_BITS + ); +} + +impl NaiveDate { + /// Makes a new `NaiveDate` from year and packed ordinal-flags, with a verification. + fn from_of(year: i32, of: Of) -> Option<NaiveDate> { + if year >= MIN_YEAR && year <= MAX_YEAR && of.valid() { + let Of(of) = of; + Some(NaiveDate { ymdf: (year << 13) | (of as DateImpl) }) + } else { + None + } + } + + /// Makes a new `NaiveDate` from year and packed month-day-flags, with a verification. + fn from_mdf(year: i32, mdf: Mdf) -> Option<NaiveDate> { + NaiveDate::from_of(year, mdf.to_of()) + } + + /// Makes a new `NaiveDate` from the [calendar date](#calendar-date) + /// (year, month and day). + /// + /// Panics on the out-of-range date, invalid month and/or day. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_ymd(2015, 3, 14); + /// assert_eq!(d.year(), 2015); + /// assert_eq!(d.month(), 3); + /// assert_eq!(d.day(), 14); + /// assert_eq!(d.ordinal(), 73); // day of year + /// assert_eq!(d.iso_week().year(), 2015); + /// assert_eq!(d.iso_week().week(), 11); + /// assert_eq!(d.weekday(), Weekday::Sat); + /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE + /// ~~~~ + pub fn from_ymd(year: i32, month: u32, day: u32) -> NaiveDate { + NaiveDate::from_ymd_opt(year, month, day).expect("invalid or out-of-range date") + } + + /// Makes a new `NaiveDate` from the [calendar date](#calendar-date) + /// (year, month and day). + /// + /// Returns `None` on the out-of-range date, invalid month and/or day. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let from_ymd_opt = NaiveDate::from_ymd_opt; + /// + /// assert!(from_ymd_opt(2015, 3, 14).is_some()); + /// assert!(from_ymd_opt(2015, 0, 14).is_none()); + /// assert!(from_ymd_opt(2015, 2, 29).is_none()); + /// assert!(from_ymd_opt(-4, 2, 29).is_some()); // 5 BCE is a leap year + /// assert!(from_ymd_opt(400000, 1, 1).is_none()); + /// assert!(from_ymd_opt(-400000, 1, 1).is_none()); + /// ~~~~ + pub fn from_ymd_opt(year: i32, month: u32, day: u32) -> Option<NaiveDate> { + let flags = YearFlags::from_year(year); + NaiveDate::from_mdf(year, Mdf::new(month, day, flags)) + } + + /// Makes a new `NaiveDate` from the [ordinal date](#ordinal-date) + /// (year and day of the year). + /// + /// Panics on the out-of-range date and/or invalid day of year. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_yo(2015, 73); + /// assert_eq!(d.ordinal(), 73); + /// assert_eq!(d.year(), 2015); + /// assert_eq!(d.month(), 3); + /// assert_eq!(d.day(), 14); + /// assert_eq!(d.iso_week().year(), 2015); + /// assert_eq!(d.iso_week().week(), 11); + /// assert_eq!(d.weekday(), Weekday::Sat); + /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE + /// ~~~~ + pub fn from_yo(year: i32, ordinal: u32) -> NaiveDate { + NaiveDate::from_yo_opt(year, ordinal).expect("invalid or out-of-range date") + } + + /// Makes a new `NaiveDate` from the [ordinal date](#ordinal-date) + /// (year and day of the year). + /// + /// Returns `None` on the out-of-range date and/or invalid day of year. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let from_yo_opt = NaiveDate::from_yo_opt; + /// + /// assert!(from_yo_opt(2015, 100).is_some()); + /// assert!(from_yo_opt(2015, 0).is_none()); + /// assert!(from_yo_opt(2015, 365).is_some()); + /// assert!(from_yo_opt(2015, 366).is_none()); + /// assert!(from_yo_opt(-4, 366).is_some()); // 5 BCE is a leap year + /// assert!(from_yo_opt(400000, 1).is_none()); + /// assert!(from_yo_opt(-400000, 1).is_none()); + /// ~~~~ + pub fn from_yo_opt(year: i32, ordinal: u32) -> Option<NaiveDate> { + let flags = YearFlags::from_year(year); + NaiveDate::from_of(year, Of::new(ordinal, flags)) + } + + /// Makes a new `NaiveDate` from the [ISO week date](#week-date) + /// (year, week number and day of the week). + /// The resulting `NaiveDate` may have a different year from the input year. + /// + /// Panics on the out-of-range date and/or invalid week number. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_isoywd(2015, 11, Weekday::Sat); + /// assert_eq!(d.iso_week().year(), 2015); + /// assert_eq!(d.iso_week().week(), 11); + /// assert_eq!(d.weekday(), Weekday::Sat); + /// assert_eq!(d.year(), 2015); + /// assert_eq!(d.month(), 3); + /// assert_eq!(d.day(), 14); + /// assert_eq!(d.ordinal(), 73); // day of year + /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE + /// ~~~~ + pub fn from_isoywd(year: i32, week: u32, weekday: Weekday) -> NaiveDate { + NaiveDate::from_isoywd_opt(year, week, weekday).expect("invalid or out-of-range date") + } + + /// Makes a new `NaiveDate` from the [ISO week date](#week-date) + /// (year, week number and day of the week). + /// The resulting `NaiveDate` may have a different year from the input year. + /// + /// Returns `None` on the out-of-range date and/or invalid week number. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Weekday}; + /// + /// let from_ymd = NaiveDate::from_ymd; + /// let from_isoywd_opt = NaiveDate::from_isoywd_opt; + /// + /// assert_eq!(from_isoywd_opt(2015, 0, Weekday::Sun), None); + /// assert_eq!(from_isoywd_opt(2015, 10, Weekday::Sun), Some(from_ymd(2015, 3, 8))); + /// assert_eq!(from_isoywd_opt(2015, 30, Weekday::Mon), Some(from_ymd(2015, 7, 20))); + /// assert_eq!(from_isoywd_opt(2015, 60, Weekday::Mon), None); + /// + /// assert_eq!(from_isoywd_opt(400000, 10, Weekday::Fri), None); + /// assert_eq!(from_isoywd_opt(-400000, 10, Weekday::Sat), None); + /// ~~~~ + /// + /// The year number of ISO week date may differ from that of the calendar date. + /// + /// ~~~~ + /// # use chrono::{NaiveDate, Weekday}; + /// # let from_ymd = NaiveDate::from_ymd; + /// # let from_isoywd_opt = NaiveDate::from_isoywd_opt; + /// // Mo Tu We Th Fr Sa Su + /// // 2014-W52 22 23 24 25 26 27 28 has 4+ days of new year, + /// // 2015-W01 29 30 31 1 2 3 4 <- so this is the first week + /// assert_eq!(from_isoywd_opt(2014, 52, Weekday::Sun), Some(from_ymd(2014, 12, 28))); + /// assert_eq!(from_isoywd_opt(2014, 53, Weekday::Mon), None); + /// assert_eq!(from_isoywd_opt(2015, 1, Weekday::Mon), Some(from_ymd(2014, 12, 29))); + /// + /// // 2015-W52 21 22 23 24 25 26 27 has 4+ days of old year, + /// // 2015-W53 28 29 30 31 1 2 3 <- so this is the last week + /// // 2016-W01 4 5 6 7 8 9 10 + /// assert_eq!(from_isoywd_opt(2015, 52, Weekday::Sun), Some(from_ymd(2015, 12, 27))); + /// assert_eq!(from_isoywd_opt(2015, 53, Weekday::Sun), Some(from_ymd(2016, 1, 3))); + /// assert_eq!(from_isoywd_opt(2015, 54, Weekday::Mon), None); + /// assert_eq!(from_isoywd_opt(2016, 1, Weekday::Mon), Some(from_ymd(2016, 1, 4))); + /// ~~~~ + pub fn from_isoywd_opt(year: i32, week: u32, weekday: Weekday) -> Option<NaiveDate> { + let flags = YearFlags::from_year(year); + let nweeks = flags.nisoweeks(); + if 1 <= week && week <= nweeks { + // ordinal = week ordinal - delta + let weekord = week * 7 + weekday as u32; + let delta = flags.isoweek_delta(); + if weekord <= delta { + // ordinal < 1, previous year + let prevflags = YearFlags::from_year(year - 1); + NaiveDate::from_of( + year - 1, + Of::new(weekord + prevflags.ndays() - delta, prevflags), + ) + } else { + let ordinal = weekord - delta; + let ndays = flags.ndays(); + if ordinal <= ndays { + // this year + NaiveDate::from_of(year, Of::new(ordinal, flags)) + } else { + // ordinal > ndays, next year + let nextflags = YearFlags::from_year(year + 1); + NaiveDate::from_of(year + 1, Of::new(ordinal - ndays, nextflags)) + } + } + } else { + None + } + } + + /// Makes a new `NaiveDate` from a day's number in the proleptic Gregorian calendar, with + /// January 1, 1 being day 1. + /// + /// Panics if the date is out of range. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_num_days_from_ce(735671); + /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE + /// assert_eq!(d.year(), 2015); + /// assert_eq!(d.month(), 3); + /// assert_eq!(d.day(), 14); + /// assert_eq!(d.ordinal(), 73); // day of year + /// assert_eq!(d.iso_week().year(), 2015); + /// assert_eq!(d.iso_week().week(), 11); + /// assert_eq!(d.weekday(), Weekday::Sat); + /// ~~~~ + /// + /// While not directly supported by Chrono, + /// it is easy to convert from the Julian day number + /// (January 1, 4713 BCE in the *Julian* calendar being Day 0) + /// to Gregorian with this method. + /// (Note that this panics when `jd` is out of range.) + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// fn jd_to_date(jd: i32) -> NaiveDate { + /// // keep in mind that the Julian day number is 0-based + /// // while this method requires an 1-based number. + /// NaiveDate::from_num_days_from_ce(jd - 1721425) + /// } + /// + /// // January 1, 4713 BCE in Julian = November 24, 4714 BCE in Gregorian + /// assert_eq!(jd_to_date(0), NaiveDate::from_ymd(-4713, 11, 24)); + /// + /// assert_eq!(jd_to_date(1721426), NaiveDate::from_ymd(1, 1, 1)); + /// assert_eq!(jd_to_date(2450000), NaiveDate::from_ymd(1995, 10, 9)); + /// assert_eq!(jd_to_date(2451545), NaiveDate::from_ymd(2000, 1, 1)); + /// ~~~~ + #[inline] + pub fn from_num_days_from_ce(days: i32) -> NaiveDate { + NaiveDate::from_num_days_from_ce_opt(days).expect("out-of-range date") + } + + /// Makes a new `NaiveDate` from a day's number in the proleptic Gregorian calendar, with + /// January 1, 1 being day 1. + /// + /// Returns `None` if the date is out of range. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let from_ndays_opt = NaiveDate::from_num_days_from_ce_opt; + /// let from_ymd = NaiveDate::from_ymd; + /// + /// assert_eq!(from_ndays_opt(730_000), Some(from_ymd(1999, 9, 3))); + /// assert_eq!(from_ndays_opt(1), Some(from_ymd(1, 1, 1))); + /// assert_eq!(from_ndays_opt(0), Some(from_ymd(0, 12, 31))); + /// assert_eq!(from_ndays_opt(-1), Some(from_ymd(0, 12, 30))); + /// assert_eq!(from_ndays_opt(100_000_000), None); + /// assert_eq!(from_ndays_opt(-100_000_000), None); + /// ~~~~ + pub fn from_num_days_from_ce_opt(days: i32) -> Option<NaiveDate> { + let days = days + 365; // make December 31, 1 BCE equal to day 0 + let (year_div_400, cycle) = div_mod_floor(days, 146_097); + let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); + let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); + NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)) + } + + /// Makes a new `NaiveDate` by counting the number of occurrences of a particular day-of-week + /// since the beginning of the given month. For instance, if you want the 2nd Friday of March + /// 2017, you would use `NaiveDate::from_weekday_of_month(2017, 3, Weekday::Fri, 2)`. + /// + /// # Panics + /// + /// The resulting `NaiveDate` is guaranteed to be in `month`. If `n` is larger than the number + /// of `weekday` in `month` (eg. the 6th Friday of March 2017) then this function will panic. + /// + /// `n` is 1-indexed. Passing `n=0` will cause a panic. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Weekday}; + /// + /// let from_weekday_of_month = NaiveDate::from_weekday_of_month; + /// let from_ymd = NaiveDate::from_ymd; + /// + /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Wed, 1), from_ymd(2018, 8, 1)); + /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Fri, 1), from_ymd(2018, 8, 3)); + /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Tue, 2), from_ymd(2018, 8, 14)); + /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Fri, 4), from_ymd(2018, 8, 24)); + /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Fri, 5), from_ymd(2018, 8, 31)); + /// ~~~~ + pub fn from_weekday_of_month(year: i32, month: u32, weekday: Weekday, n: u8) -> NaiveDate { + NaiveDate::from_weekday_of_month_opt(year, month, weekday, n).expect("out-of-range date") + } + + /// Makes a new `NaiveDate` by counting the number of occurrences of a particular day-of-week + /// since the beginning of the given month. For instance, if you want the 2nd Friday of March + /// 2017, you would use `NaiveDate::from_weekday_of_month(2017, 3, Weekday::Fri, 2)`. `n` is 1-indexed. + /// + /// ~~~~ + /// use chrono::{NaiveDate, Weekday}; + /// assert_eq!(NaiveDate::from_weekday_of_month_opt(2017, 3, Weekday::Fri, 2), + /// NaiveDate::from_ymd_opt(2017, 3, 10)) + /// ~~~~ + /// + /// Returns `None` if `n` out-of-range; ie. if `n` is larger than the number of `weekday` in + /// `month` (eg. the 6th Friday of March 2017), or if `n == 0`. + pub fn from_weekday_of_month_opt( + year: i32, + month: u32, + weekday: Weekday, + n: u8, + ) -> Option<NaiveDate> { + if n == 0 { + return None; + } + let first = NaiveDate::from_ymd(year, month, 1).weekday(); + let first_to_dow = (7 + weekday.number_from_monday() - first.number_from_monday()) % 7; + let day = (u32::from(n) - 1) * 7 + first_to_dow + 1; + NaiveDate::from_ymd_opt(year, month, day) + } + + /// Parses a string with the specified format string and returns a new `NaiveDate`. + /// See the [`format::strftime` module](../format/strftime/index.html) + /// on the supported escape sequences. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let parse_from_str = NaiveDate::parse_from_str; + /// + /// assert_eq!(parse_from_str("2015-09-05", "%Y-%m-%d"), + /// Ok(NaiveDate::from_ymd(2015, 9, 5))); + /// assert_eq!(parse_from_str("5sep2015", "%d%b%Y"), + /// Ok(NaiveDate::from_ymd(2015, 9, 5))); + /// ~~~~ + /// + /// Time and offset is ignored for the purpose of parsing. + /// + /// ~~~~ + /// # use chrono::NaiveDate; + /// # let parse_from_str = NaiveDate::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))); + /// ~~~~ + /// + /// Out-of-bound dates or insufficient fields are errors. + /// + /// ~~~~ + /// # use chrono::NaiveDate; + /// # let parse_from_str = NaiveDate::parse_from_str; + /// assert!(parse_from_str("2015/9", "%Y/%m").is_err()); + /// assert!(parse_from_str("2015/9/31", "%Y/%m/%d").is_err()); + /// ~~~~ + /// + /// All parsed fields should be consistent to each other, otherwise it's an error. + /// + /// ~~~~ + /// # use chrono::NaiveDate; + /// # let parse_from_str = NaiveDate::parse_from_str; + /// assert!(parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); + /// ~~~~ + pub fn parse_from_str(s: &str, fmt: &str) -> ParseResult<NaiveDate> { + let mut parsed = Parsed::new(); + parse(&mut parsed, s, StrftimeItems::new(fmt))?; + parsed.to_naive_date() + } + + /// Makes a new `NaiveDateTime` from the current date and given `NaiveTime`. + /// + /// # 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 = d.and_time(t); + /// assert_eq!(dt.date(), d); + /// assert_eq!(dt.time(), t); + /// ~~~~ + #[inline] + pub fn and_time(&self, time: NaiveTime) -> NaiveDateTime { + NaiveDateTime::new(*self, time) + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute and second. + /// + /// No [leap second](./struct.NaiveTime.html#leap-second-handling) is allowed here; + /// use `NaiveDate::and_hms_*` methods with a subsecond parameter instead. + /// + /// Panics on invalid hour, minute and/or second. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// + /// let dt: NaiveDateTime = d.and_hms(12, 34, 56); + /// assert_eq!(dt.year(), 2015); + /// assert_eq!(dt.weekday(), Weekday::Wed); + /// assert_eq!(dt.second(), 56); + /// ~~~~ + #[inline] + pub fn and_hms(&self, hour: u32, min: u32, sec: u32) -> NaiveDateTime { + self.and_hms_opt(hour, min, sec).expect("invalid time") + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute and second. + /// + /// No [leap second](./struct.NaiveTime.html#leap-second-handling) is allowed here; + /// use `NaiveDate::and_hms_*_opt` methods with a subsecond parameter instead. + /// + /// Returns `None` on invalid hour, minute and/or second. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// assert!(d.and_hms_opt(12, 34, 56).is_some()); + /// assert!(d.and_hms_opt(12, 34, 60).is_none()); // use `and_hms_milli_opt` instead + /// assert!(d.and_hms_opt(12, 60, 56).is_none()); + /// assert!(d.and_hms_opt(24, 34, 56).is_none()); + /// ~~~~ + #[inline] + pub fn and_hms_opt(&self, hour: u32, min: u32, sec: u32) -> Option<NaiveDateTime> { + NaiveTime::from_hms_opt(hour, min, sec).map(|time| self.and_time(time)) + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and millisecond. + /// + /// The millisecond part can exceed 1,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// Panics on invalid hour, minute, second and/or millisecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// + /// let dt: NaiveDateTime = d.and_hms_milli(12, 34, 56, 789); + /// assert_eq!(dt.year(), 2015); + /// assert_eq!(dt.weekday(), Weekday::Wed); + /// assert_eq!(dt.second(), 56); + /// assert_eq!(dt.nanosecond(), 789_000_000); + /// ~~~~ + #[inline] + pub fn and_hms_milli(&self, hour: u32, min: u32, sec: u32, milli: u32) -> NaiveDateTime { + self.and_hms_milli_opt(hour, min, sec, milli).expect("invalid time") + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and millisecond. + /// + /// The millisecond part can exceed 1,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// Returns `None` on invalid hour, minute, second and/or millisecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// assert!(d.and_hms_milli_opt(12, 34, 56, 789).is_some()); + /// assert!(d.and_hms_milli_opt(12, 34, 59, 1_789).is_some()); // leap second + /// assert!(d.and_hms_milli_opt(12, 34, 59, 2_789).is_none()); + /// assert!(d.and_hms_milli_opt(12, 34, 60, 789).is_none()); + /// assert!(d.and_hms_milli_opt(12, 60, 56, 789).is_none()); + /// assert!(d.and_hms_milli_opt(24, 34, 56, 789).is_none()); + /// ~~~~ + #[inline] + pub fn and_hms_milli_opt( + &self, + hour: u32, + min: u32, + sec: u32, + milli: u32, + ) -> Option<NaiveDateTime> { + NaiveTime::from_hms_milli_opt(hour, min, sec, milli).map(|time| self.and_time(time)) + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and microsecond. + /// + /// The microsecond part can exceed 1,000,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// Panics on invalid hour, minute, second and/or microsecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// + /// let dt: NaiveDateTime = d.and_hms_micro(12, 34, 56, 789_012); + /// assert_eq!(dt.year(), 2015); + /// assert_eq!(dt.weekday(), Weekday::Wed); + /// assert_eq!(dt.second(), 56); + /// assert_eq!(dt.nanosecond(), 789_012_000); + /// ~~~~ + #[inline] + pub fn and_hms_micro(&self, hour: u32, min: u32, sec: u32, micro: u32) -> NaiveDateTime { + self.and_hms_micro_opt(hour, min, sec, micro).expect("invalid time") + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and microsecond. + /// + /// The microsecond part can exceed 1,000,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// Returns `None` on invalid hour, minute, second and/or microsecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// assert!(d.and_hms_micro_opt(12, 34, 56, 789_012).is_some()); + /// assert!(d.and_hms_micro_opt(12, 34, 59, 1_789_012).is_some()); // leap second + /// assert!(d.and_hms_micro_opt(12, 34, 59, 2_789_012).is_none()); + /// assert!(d.and_hms_micro_opt(12, 34, 60, 789_012).is_none()); + /// assert!(d.and_hms_micro_opt(12, 60, 56, 789_012).is_none()); + /// assert!(d.and_hms_micro_opt(24, 34, 56, 789_012).is_none()); + /// ~~~~ + #[inline] + pub fn and_hms_micro_opt( + &self, + hour: u32, + min: u32, + sec: u32, + micro: u32, + ) -> Option<NaiveDateTime> { + NaiveTime::from_hms_micro_opt(hour, min, sec, micro).map(|time| self.and_time(time)) + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and nanosecond. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// Panics on invalid hour, minute, second and/or nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// + /// let dt: NaiveDateTime = d.and_hms_nano(12, 34, 56, 789_012_345); + /// assert_eq!(dt.year(), 2015); + /// assert_eq!(dt.weekday(), Weekday::Wed); + /// assert_eq!(dt.second(), 56); + /// assert_eq!(dt.nanosecond(), 789_012_345); + /// ~~~~ + #[inline] + pub fn and_hms_nano(&self, hour: u32, min: u32, sec: u32, nano: u32) -> NaiveDateTime { + self.and_hms_nano_opt(hour, min, sec, nano).expect("invalid time") + } + + /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and nanosecond. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). + /// + /// Returns `None` on invalid hour, minute, second and/or nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// let d = NaiveDate::from_ymd(2015, 6, 3); + /// assert!(d.and_hms_nano_opt(12, 34, 56, 789_012_345).is_some()); + /// assert!(d.and_hms_nano_opt(12, 34, 59, 1_789_012_345).is_some()); // leap second + /// assert!(d.and_hms_nano_opt(12, 34, 59, 2_789_012_345).is_none()); + /// assert!(d.and_hms_nano_opt(12, 34, 60, 789_012_345).is_none()); + /// assert!(d.and_hms_nano_opt(12, 60, 56, 789_012_345).is_none()); + /// assert!(d.and_hms_nano_opt(24, 34, 56, 789_012_345).is_none()); + /// ~~~~ + #[inline] + pub fn and_hms_nano_opt( + &self, + hour: u32, + min: u32, + sec: u32, + nano: u32, + ) -> Option<NaiveDateTime> { + NaiveTime::from_hms_nano_opt(hour, min, sec, nano).map(|time| self.and_time(time)) + } + + /// Returns the packed month-day-flags. + #[inline] + fn mdf(&self) -> Mdf { + self.of().to_mdf() + } + + /// Returns the packed ordinal-flags. + #[inline] + fn of(&self) -> Of { + Of((self.ymdf & 0b1_1111_1111_1111) as u32) + } + + /// Makes a new `NaiveDate` with the packed month-day-flags changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + #[inline] + fn with_mdf(&self, mdf: Mdf) -> Option<NaiveDate> { + self.with_of(mdf.to_of()) + } + + /// Makes a new `NaiveDate` with the packed ordinal-flags changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + #[inline] + fn with_of(&self, of: Of) -> Option<NaiveDate> { + if of.valid() { + let Of(of) = of; + Some(NaiveDate { ymdf: (self.ymdf & !0b1_1111_1111_1111) | of as DateImpl }) + } else { + None + } + } + + /// Makes a new `NaiveDate` for the next calendar date. + /// + /// Panics when `self` is the last representable date. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).succ(), NaiveDate::from_ymd(2015, 6, 4)); + /// assert_eq!(NaiveDate::from_ymd(2015, 6, 30).succ(), NaiveDate::from_ymd(2015, 7, 1)); + /// assert_eq!(NaiveDate::from_ymd(2015, 12, 31).succ(), NaiveDate::from_ymd(2016, 1, 1)); + /// ~~~~ + #[inline] + pub fn succ(&self) -> NaiveDate { + self.succ_opt().expect("out of bound") + } + + /// Makes a new `NaiveDate` for the next calendar date. + /// + /// Returns `None` when `self` is the last representable date. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// use chrono::naive::MAX_DATE; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).succ_opt(), + /// Some(NaiveDate::from_ymd(2015, 6, 4))); + /// assert_eq!(MAX_DATE.succ_opt(), None); + /// ~~~~ + #[inline] + pub fn succ_opt(&self) -> Option<NaiveDate> { + self.with_of(self.of().succ()).or_else(|| NaiveDate::from_ymd_opt(self.year() + 1, 1, 1)) + } + + /// Makes a new `NaiveDate` for the previous calendar date. + /// + /// Panics when `self` is the first representable date. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).pred(), NaiveDate::from_ymd(2015, 6, 2)); + /// assert_eq!(NaiveDate::from_ymd(2015, 6, 1).pred(), NaiveDate::from_ymd(2015, 5, 31)); + /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).pred(), NaiveDate::from_ymd(2014, 12, 31)); + /// ~~~~ + #[inline] + pub fn pred(&self) -> NaiveDate { + self.pred_opt().expect("out of bound") + } + + /// Makes a new `NaiveDate` for the previous calendar date. + /// + /// Returns `None` when `self` is the first representable date. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveDate; + /// use chrono::naive::MIN_DATE; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).pred_opt(), + /// Some(NaiveDate::from_ymd(2015, 6, 2))); + /// assert_eq!(MIN_DATE.pred_opt(), None); + /// ~~~~ + #[inline] + pub fn pred_opt(&self) -> Option<NaiveDate> { + self.with_of(self.of().pred()).or_else(|| NaiveDate::from_ymd_opt(self.year() - 1, 12, 31)) + } + + /// Adds the `days` part of given `Duration` to the current date. + /// + /// Returns `None` when it will result in overflow. + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveDate}; + /// use chrono::naive::MAX_DATE; + /// + /// let d = NaiveDate::from_ymd(2015, 9, 5); + /// assert_eq!(d.checked_add_signed(Duration::days(40)), + /// Some(NaiveDate::from_ymd(2015, 10, 15))); + /// assert_eq!(d.checked_add_signed(Duration::days(-40)), + /// Some(NaiveDate::from_ymd(2015, 7, 27))); + /// assert_eq!(d.checked_add_signed(Duration::days(1_000_000_000)), None); + /// assert_eq!(d.checked_add_signed(Duration::days(-1_000_000_000)), None); + /// assert_eq!(MAX_DATE.checked_add_signed(Duration::days(1)), None); + /// # } + /// ~~~~ + pub fn checked_add_signed(self, rhs: OldDuration) -> Option<NaiveDate> { + let year = self.year(); + let (mut year_div_400, year_mod_400) = div_mod_floor(year, 400); + let cycle = internals::yo_to_cycle(year_mod_400 as u32, self.of().ordinal()); + let cycle = try_opt!((cycle as i32).checked_add(try_opt!(rhs.num_days().to_i32()))); + let (cycle_div_400y, cycle) = div_mod_floor(cycle, 146_097); + year_div_400 += cycle_div_400y; + + let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); + let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); + NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)) + } + + /// Subtracts the `days` part of given `Duration` from the current date. + /// + /// Returns `None` when it will result in overflow. + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveDate}; + /// use chrono::naive::MIN_DATE; + /// + /// let d = NaiveDate::from_ymd(2015, 9, 5); + /// assert_eq!(d.checked_sub_signed(Duration::days(40)), + /// Some(NaiveDate::from_ymd(2015, 7, 27))); + /// assert_eq!(d.checked_sub_signed(Duration::days(-40)), + /// Some(NaiveDate::from_ymd(2015, 10, 15))); + /// assert_eq!(d.checked_sub_signed(Duration::days(1_000_000_000)), None); + /// assert_eq!(d.checked_sub_signed(Duration::days(-1_000_000_000)), None); + /// assert_eq!(MIN_DATE.checked_sub_signed(Duration::days(1)), None); + /// # } + /// ~~~~ + pub fn checked_sub_signed(self, rhs: OldDuration) -> Option<NaiveDate> { + let year = self.year(); + let (mut year_div_400, year_mod_400) = div_mod_floor(year, 400); + let cycle = internals::yo_to_cycle(year_mod_400 as u32, self.of().ordinal()); + let cycle = try_opt!((cycle as i32).checked_sub(try_opt!(rhs.num_days().to_i32()))); + let (cycle_div_400y, cycle) = div_mod_floor(cycle, 146_097); + year_div_400 += cycle_div_400y; + + let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); + let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); + NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)) + } + + /// Subtracts another `NaiveDate` from the current date. + /// Returns a `Duration` of integral numbers. + /// + /// This does not overflow or underflow at all, + /// as all possible output fits in the range of `Duration`. + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveDate}; + /// + /// let from_ymd = NaiveDate::from_ymd; + /// let since = NaiveDate::signed_duration_since; + /// + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 1)), Duration::zero()); + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 12, 31)), Duration::days(1)); + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 2)), Duration::days(-1)); + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 9, 23)), Duration::days(100)); + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 1, 1)), Duration::days(365)); + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2010, 1, 1)), Duration::days(365*4 + 1)); + /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(1614, 1, 1)), Duration::days(365*400 + 97)); + /// # } + /// ~~~~ + pub fn signed_duration_since(self, rhs: NaiveDate) -> OldDuration { + let year1 = self.year(); + let year2 = rhs.year(); + let (year1_div_400, year1_mod_400) = div_mod_floor(year1, 400); + let (year2_div_400, year2_mod_400) = div_mod_floor(year2, 400); + let cycle1 = i64::from(internals::yo_to_cycle(year1_mod_400 as u32, self.of().ordinal())); + let cycle2 = i64::from(internals::yo_to_cycle(year2_mod_400 as u32, rhs.of().ordinal())); + OldDuration::days( + (i64::from(year1_div_400) - i64::from(year2_div_400)) * 146_097 + (cycle1 - cycle2), + ) + } + + /// Formats the date with the specified formatting items. + /// Otherwise it is the same as the ordinary `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"); + /// let d = NaiveDate::from_ymd(2015, 9, 5); + /// assert_eq!(d.format_with_items(fmt.clone()).to_string(), "2015-09-05"); + /// assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05"); + /// ~~~~ + /// + /// 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").clone(); + /// # let d = NaiveDate::from_ymd(2015, 9, 5); + /// assert_eq!(format!("{}", d.format_with_items(fmt)), "2015-09-05"); + /// ~~~~ + #[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), None, items) + } + + /// Formats the date 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 d = NaiveDate::from_ymd(2015, 9, 5); + /// assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05"); + /// assert_eq!(d.format("%A, %-d %B, %C%y").to_string(), "Saturday, 5 September, 2015"); + /// ~~~~ + /// + /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. + /// + /// ~~~~ + /// # use chrono::NaiveDate; + /// # let d = NaiveDate::from_ymd(2015, 9, 5); + /// assert_eq!(format!("{}", d.format("%Y-%m-%d")), "2015-09-05"); + /// assert_eq!(format!("{}", d.format("%A, %-d %B, %C%y")), "Saturday, 5 September, 2015"); + /// ~~~~ + #[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)) + } + + /// Returns an iterator that steps by days until the last representable date. + /// + /// # Example + /// + /// ``` + /// # use chrono::NaiveDate; + /// + /// let expected = [ + /// NaiveDate::from_ymd(2016, 2, 27), + /// NaiveDate::from_ymd(2016, 2, 28), + /// NaiveDate::from_ymd(2016, 2, 29), + /// NaiveDate::from_ymd(2016, 3, 1), + /// ]; + /// + /// let mut count = 0; + /// for (idx, d) in NaiveDate::from_ymd(2016, 2, 27).iter_days().take(4).enumerate() { + /// assert_eq!(d, expected[idx]); + /// count += 1; + /// } + /// assert_eq!(count, 4); + /// ``` + #[inline] + pub fn iter_days(&self) -> NaiveDateDaysIterator { + NaiveDateDaysIterator { value: *self } + } + + /// Returns an iterator that steps by weeks until the last representable date. + /// + /// # Example + /// + /// ``` + /// # use chrono::NaiveDate; + /// + /// let expected = [ + /// NaiveDate::from_ymd(2016, 2, 27), + /// NaiveDate::from_ymd(2016, 3, 5), + /// NaiveDate::from_ymd(2016, 3, 12), + /// NaiveDate::from_ymd(2016, 3, 19), + /// ]; + /// + /// let mut count = 0; + /// for (idx, d) in NaiveDate::from_ymd(2016, 2, 27).iter_weeks().take(4).enumerate() { + /// assert_eq!(d, expected[idx]); + /// count += 1; + /// } + /// assert_eq!(count, 4); + /// ``` + #[inline] + pub fn iter_weeks(&self) -> NaiveDateWeeksIterator { + NaiveDateWeeksIterator { value: *self } + } +} + +impl Datelike for NaiveDate { + /// Returns the year number in the [calendar date](#calendar-date). + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).year(), 2015); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).year(), -308); // 309 BCE + /// ~~~~ + #[inline] + fn year(&self) -> i32 { + self.ymdf >> 13 + } + + /// Returns the month number starting from 1. + /// + /// The return value ranges from 1 to 12. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).month(), 9); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).month(), 3); + /// ~~~~ + #[inline] + fn month(&self) -> u32 { + self.mdf().month() + } + + /// Returns the month number starting from 0. + /// + /// The return value ranges from 0 to 11. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).month0(), 8); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).month0(), 2); + /// ~~~~ + #[inline] + fn month0(&self) -> u32 { + self.mdf().month() - 1 + } + + /// Returns the day of month starting from 1. + /// + /// The return value ranges from 1 to 31. (The last day of month differs by months.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).day(), 8); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).day(), 14); + /// ~~~~ + /// + /// Combined with [`NaiveDate::pred`](#method.pred), + /// one can determine the number of days in a particular month. + /// (Note that this panics when `year` is out of range.) + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// fn ndays_in_month(year: i32, month: u32) -> u32 { + /// // the first day of the next month... + /// let (y, m) = if month == 12 { (year + 1, 1) } else { (year, month + 1) }; + /// let d = NaiveDate::from_ymd(y, m, 1); + /// + /// // ...is preceded by the last day of the original month + /// d.pred().day() + /// } + /// + /// assert_eq!(ndays_in_month(2015, 8), 31); + /// assert_eq!(ndays_in_month(2015, 9), 30); + /// assert_eq!(ndays_in_month(2015, 12), 31); + /// assert_eq!(ndays_in_month(2016, 2), 29); + /// assert_eq!(ndays_in_month(2017, 2), 28); + /// ~~~~ + #[inline] + fn day(&self) -> u32 { + self.mdf().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.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).day0(), 7); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).day0(), 13); + /// ~~~~ + #[inline] + fn day0(&self) -> u32 { + self.mdf().day() - 1 + } + + /// Returns the day of year starting from 1. + /// + /// The return value ranges from 1 to 366. (The last day of year differs by years.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).ordinal(), 251); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).ordinal(), 74); + /// ~~~~ + /// + /// Combined with [`NaiveDate::pred`](#method.pred), + /// one can determine the number of days in a particular year. + /// (Note that this panics when `year` is out of range.) + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// fn ndays_in_year(year: i32) -> u32 { + /// // the first day of the next year... + /// let d = NaiveDate::from_ymd(year + 1, 1, 1); + /// + /// // ...is preceded by the last day of the original year + /// d.pred().ordinal() + /// } + /// + /// assert_eq!(ndays_in_year(2015), 365); + /// assert_eq!(ndays_in_year(2016), 366); + /// assert_eq!(ndays_in_year(2017), 365); + /// assert_eq!(ndays_in_year(2000), 366); + /// assert_eq!(ndays_in_year(2100), 365); + /// ~~~~ + #[inline] + fn ordinal(&self) -> u32 { + self.of().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.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).ordinal0(), 250); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).ordinal0(), 73); + /// ~~~~ + #[inline] + fn ordinal0(&self) -> u32 { + self.of().ordinal() - 1 + } + + /// Returns the day of week. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).weekday(), Weekday::Tue); + /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).weekday(), Weekday::Fri); + /// ~~~~ + #[inline] + fn weekday(&self) -> Weekday { + self.of().weekday() + } + + #[inline] + fn iso_week(&self) -> IsoWeek { + isoweek::iso_week_from_yof(self.year(), self.of()) + } + + /// Makes a new `NaiveDate` with the year number changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_year(2016), + /// Some(NaiveDate::from_ymd(2016, 9, 8))); + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_year(-308), + /// Some(NaiveDate::from_ymd(-308, 9, 8))); + /// ~~~~ + /// + /// A leap day (February 29) is a good example that this method can return `None`. + /// + /// ~~~~ + /// # use chrono::{NaiveDate, Datelike}; + /// assert!(NaiveDate::from_ymd(2016, 2, 29).with_year(2015).is_none()); + /// assert!(NaiveDate::from_ymd(2016, 2, 29).with_year(2020).is_some()); + /// ~~~~ + #[inline] + fn with_year(&self, year: i32) -> Option<NaiveDate> { + // we need to operate with `mdf` since we should keep the month and day number as is + let mdf = self.mdf(); + + // adjust the flags as needed + let flags = YearFlags::from_year(year); + let mdf = mdf.with_flags(flags); + + NaiveDate::from_mdf(year, mdf) + } + + /// Makes a new `NaiveDate` with the month number (starting from 1) changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month(10), + /// Some(NaiveDate::from_ymd(2015, 10, 8))); + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month(13), None); // no month 13 + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 30).with_month(2), None); // no February 30 + /// ~~~~ + #[inline] + fn with_month(&self, month: u32) -> Option<NaiveDate> { + self.with_mdf(self.mdf().with_month(month)) + } + + /// Makes a new `NaiveDate` with the month number (starting from 0) changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month0(9), + /// Some(NaiveDate::from_ymd(2015, 10, 8))); + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month0(12), None); // no month 13 + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 30).with_month0(1), None); // no February 30 + /// ~~~~ + #[inline] + fn with_month0(&self, month0: u32) -> Option<NaiveDate> { + self.with_mdf(self.mdf().with_month(month0 + 1)) + } + + /// Makes a new `NaiveDate` with the day of month (starting from 1) changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day(30), + /// Some(NaiveDate::from_ymd(2015, 9, 30))); + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day(31), + /// None); // no September 31 + /// ~~~~ + #[inline] + fn with_day(&self, day: u32) -> Option<NaiveDate> { + self.with_mdf(self.mdf().with_day(day)) + } + + /// Makes a new `NaiveDate` with the day of month (starting from 0) changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day0(29), + /// Some(NaiveDate::from_ymd(2015, 9, 30))); + /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day0(30), + /// None); // no September 31 + /// ~~~~ + #[inline] + fn with_day0(&self, day0: u32) -> Option<NaiveDate> { + self.with_mdf(self.mdf().with_day(day0 + 1)) + } + + /// Makes a new `NaiveDate` with the day of year (starting from 1) changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal(60), + /// Some(NaiveDate::from_ymd(2015, 3, 1))); + /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal(366), + /// None); // 2015 had only 365 days + /// + /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal(60), + /// Some(NaiveDate::from_ymd(2016, 2, 29))); + /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal(366), + /// Some(NaiveDate::from_ymd(2016, 12, 31))); + /// ~~~~ + #[inline] + fn with_ordinal(&self, ordinal: u32) -> Option<NaiveDate> { + self.with_of(self.of().with_ordinal(ordinal)) + } + + /// Makes a new `NaiveDate` with the day of year (starting from 0) changed. + /// + /// Returns `None` when the resulting `NaiveDate` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike}; + /// + /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal0(59), + /// Some(NaiveDate::from_ymd(2015, 3, 1))); + /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal0(365), + /// None); // 2015 had only 365 days + /// + /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal0(59), + /// Some(NaiveDate::from_ymd(2016, 2, 29))); + /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal0(365), + /// Some(NaiveDate::from_ymd(2016, 12, 31))); + /// ~~~~ + #[inline] + fn with_ordinal0(&self, ordinal0: u32) -> Option<NaiveDate> { + self.with_of(self.of().with_ordinal(ordinal0 + 1)) + } +} + +/// An addition of `Duration` to `NaiveDate` discards the fractional days, +/// rounding to the closest integral number of days towards `Duration::zero()`. +/// +/// Panics on underflow or overflow. +/// Use [`NaiveDate::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; +/// +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::zero(), from_ymd(2014, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(86399), from_ymd(2014, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(-86399), from_ymd(2014, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(1), from_ymd(2014, 1, 2)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(-1), from_ymd(2013, 12, 31)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(364), from_ymd(2014, 12, 31)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*4 + 1), from_ymd(2018, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*400 + 97), from_ymd(2414, 1, 1)); +/// # } +/// ~~~~ +impl Add<OldDuration> for NaiveDate { + type Output = NaiveDate; + + #[inline] + fn add(self, rhs: OldDuration) -> NaiveDate { + self.checked_add_signed(rhs).expect("`NaiveDate + Duration` overflowed") + } +} + +impl AddAssign<OldDuration> for NaiveDate { + #[inline] + fn add_assign(&mut self, rhs: OldDuration) { + *self = self.add(rhs); + } +} + +/// A subtraction of `Duration` from `NaiveDate` discards the fractional days, +/// rounding to the closest integral number of days towards `Duration::zero()`. +/// It is the same as the addition with a negated `Duration`. +/// +/// Panics on underflow or overflow. +/// Use [`NaiveDate::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; +/// +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::zero(), from_ymd(2014, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(86399), from_ymd(2014, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(-86399), from_ymd(2014, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(1), from_ymd(2013, 12, 31)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(-1), from_ymd(2014, 1, 2)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(364), from_ymd(2013, 1, 2)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*4 + 1), from_ymd(2010, 1, 1)); +/// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*400 + 97), from_ymd(1614, 1, 1)); +/// # } +/// ~~~~ +impl Sub<OldDuration> for NaiveDate { + type Output = NaiveDate; + + #[inline] + fn sub(self, rhs: OldDuration) -> NaiveDate { + self.checked_sub_signed(rhs).expect("`NaiveDate - Duration` overflowed") + } +} + +impl SubAssign<OldDuration> for NaiveDate { + #[inline] + fn sub_assign(&mut self, rhs: OldDuration) { + *self = self.sub(rhs); + } +} + +/// Subtracts another `NaiveDate` from the current date. +/// Returns a `Duration` of integral numbers. +/// +/// This does not overflow or underflow at all, +/// as all possible output fits in the range of `Duration`. +/// +/// The implementation is a wrapper around +/// [`NaiveDate::signed_duration_since`](#method.signed_duration_since). +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveDate}; +/// +/// let from_ymd = NaiveDate::from_ymd; +/// +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 1), Duration::zero()); +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 12, 31), Duration::days(1)); +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 2), Duration::days(-1)); +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 9, 23), Duration::days(100)); +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 1, 1), Duration::days(365)); +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2010, 1, 1), Duration::days(365*4 + 1)); +/// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(1614, 1, 1), Duration::days(365*400 + 97)); +/// # } +/// ~~~~ +impl Sub<NaiveDate> for NaiveDate { + type Output = OldDuration; + + #[inline] + fn sub(self, rhs: NaiveDate) -> OldDuration { + self.signed_duration_since(rhs) + } +} + +/// Iterator over `NaiveDate` with a step size of one day. +#[derive(Debug, Copy, Clone, Hash, PartialEq, PartialOrd, Eq, Ord)] +pub struct NaiveDateDaysIterator { + value: NaiveDate, +} + +impl Iterator for NaiveDateDaysIterator { + type Item = NaiveDate; + + fn next(&mut self) -> Option<Self::Item> { + if self.value == MAX_DATE { + return None; + } + // current < MAX_DATE from here on: + let current = self.value; + // This can't panic because current is < MAX_DATE: + self.value = current.succ(); + Some(current) + } + + fn size_hint(&self) -> (usize, Option<usize>) { + let exact_size = MAX_DATE.signed_duration_since(self.value).num_days(); + (exact_size as usize, Some(exact_size as usize)) + } +} + +impl ExactSizeIterator for NaiveDateDaysIterator {} + +#[derive(Debug, Copy, Clone, Hash, PartialEq, PartialOrd, Eq, Ord)] +pub struct NaiveDateWeeksIterator { + value: NaiveDate, +} + +impl Iterator for NaiveDateWeeksIterator { + type Item = NaiveDate; + + fn next(&mut self) -> Option<Self::Item> { + if MAX_DATE - self.value < OldDuration::weeks(1) { + return None; + } + let current = self.value; + self.value = current + OldDuration::weeks(1); + Some(current) + } + + fn size_hint(&self) -> (usize, Option<usize>) { + let exact_size = MAX_DATE.signed_duration_since(self.value).num_weeks(); + (exact_size as usize, Some(exact_size as usize)) + } +} + +impl ExactSizeIterator for NaiveDateWeeksIterator {} + +// TODO: NaiveDateDaysIterator and NaiveDateWeeksIterator should implement FusedIterator, +// TrustedLen, and Step once they becomes stable. +// See: https://github.com/chronotope/chrono/issues/208 + +/// The `Debug` output of the naive date `d` is the same as +/// [`d.format("%Y-%m-%d")`](../format/strftime/index.html). +/// +/// The string printed can be readily parsed via the `parse` method on `str`. +/// +/// # Example +/// +/// ~~~~ +/// use chrono::NaiveDate; +/// +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd(2015, 9, 5)), "2015-09-05"); +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd( 0, 1, 1)), "0000-01-01"); +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31"); +/// ~~~~ +/// +/// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. +/// +/// ~~~~ +/// # use chrono::NaiveDate; +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd( -1, 1, 1)), "-0001-01-01"); +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31"); +/// ~~~~ +impl fmt::Debug for NaiveDate { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let year = self.year(); + let mdf = self.mdf(); + if 0 <= year && year <= 9999 { + write!(f, "{:04}-{:02}-{:02}", year, mdf.month(), mdf.day()) + } else { + // ISO 8601 requires the explicit sign for out-of-range years + write!(f, "{:+05}-{:02}-{:02}", year, mdf.month(), mdf.day()) + } + } +} + +/// The `Display` output of the naive date `d` is the same as +/// [`d.format("%Y-%m-%d")`](../format/strftime/index.html). +/// +/// The string printed can be readily parsed via the `parse` method on `str`. +/// +/// # Example +/// +/// ~~~~ +/// use chrono::NaiveDate; +/// +/// assert_eq!(format!("{}", NaiveDate::from_ymd(2015, 9, 5)), "2015-09-05"); +/// assert_eq!(format!("{}", NaiveDate::from_ymd( 0, 1, 1)), "0000-01-01"); +/// assert_eq!(format!("{}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31"); +/// ~~~~ +/// +/// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. +/// +/// ~~~~ +/// # use chrono::NaiveDate; +/// assert_eq!(format!("{}", NaiveDate::from_ymd( -1, 1, 1)), "-0001-01-01"); +/// assert_eq!(format!("{}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31"); +/// ~~~~ +impl fmt::Display for NaiveDate { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + fmt::Debug::fmt(self, f) + } +} + +/// Parsing a `str` into a `NaiveDate` uses the same format, +/// [`%Y-%m-%d`](../format/strftime/index.html), as in `Debug` and `Display`. +/// +/// # Example +/// +/// ~~~~ +/// use chrono::NaiveDate; +/// +/// let d = NaiveDate::from_ymd(2015, 9, 18); +/// assert_eq!("2015-09-18".parse::<NaiveDate>(), Ok(d)); +/// +/// let d = NaiveDate::from_ymd(12345, 6, 7); +/// assert_eq!("+12345-6-7".parse::<NaiveDate>(), Ok(d)); +/// +/// assert!("foo".parse::<NaiveDate>().is_err()); +/// ~~~~ +impl str::FromStr for NaiveDate { + type Err = ParseError; + + fn from_str(s: &str) -> ParseResult<NaiveDate> { + 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(""), + ]; + + let mut parsed = Parsed::new(); + parse(&mut parsed, s, ITEMS.iter())?; + parsed.to_naive_date() + } +} + +#[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] +fn test_encodable_json<F, E>(to_string: F) +where + F: Fn(&NaiveDate) -> Result<String, E>, + E: ::std::fmt::Debug, +{ + assert_eq!(to_string(&NaiveDate::from_ymd(2014, 7, 24)).ok(), Some(r#""2014-07-24""#.into())); + assert_eq!(to_string(&NaiveDate::from_ymd(0, 1, 1)).ok(), Some(r#""0000-01-01""#.into())); + assert_eq!(to_string(&NaiveDate::from_ymd(-1, 12, 31)).ok(), Some(r#""-0001-12-31""#.into())); + assert_eq!(to_string(&MIN_DATE).ok(), Some(r#""-262144-01-01""#.into())); + assert_eq!(to_string(&MAX_DATE).ok(), Some(r#""+262143-12-31""#.into())); +} + +#[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] +fn test_decodable_json<F, E>(from_str: F) +where + F: Fn(&str) -> Result<NaiveDate, E>, + E: ::std::fmt::Debug, +{ + use std::{i32, i64}; + + assert_eq!(from_str(r#""2016-07-08""#).ok(), Some(NaiveDate::from_ymd(2016, 7, 8))); + assert_eq!(from_str(r#""2016-7-8""#).ok(), Some(NaiveDate::from_ymd(2016, 7, 8))); + assert_eq!(from_str(r#""+002016-07-08""#).ok(), Some(NaiveDate::from_ymd(2016, 7, 8))); + assert_eq!(from_str(r#""0000-01-01""#).ok(), Some(NaiveDate::from_ymd(0, 1, 1))); + assert_eq!(from_str(r#""0-1-1""#).ok(), Some(NaiveDate::from_ymd(0, 1, 1))); + assert_eq!(from_str(r#""-0001-12-31""#).ok(), Some(NaiveDate::from_ymd(-1, 12, 31))); + assert_eq!(from_str(r#""-262144-01-01""#).ok(), Some(MIN_DATE)); + assert_eq!(from_str(r#""+262143-12-31""#).ok(), Some(MAX_DATE)); + + // bad formats + assert!(from_str(r#""""#).is_err()); + assert!(from_str(r#""20001231""#).is_err()); + assert!(from_str(r#""2000-00-00""#).is_err()); + assert!(from_str(r#""2000-02-30""#).is_err()); + assert!(from_str(r#""2001-02-29""#).is_err()); + assert!(from_str(r#""2002-002-28""#).is_err()); + assert!(from_str(r#""yyyy-mm-dd""#).is_err()); + assert!(from_str(r#"0"#).is_err()); + assert!(from_str(r#"20.01"#).is_err()); + assert!(from_str(&i32::MIN.to_string()).is_err()); + assert!(from_str(&i32::MAX.to_string()).is_err()); + assert!(from_str(&i64::MIN.to_string()).is_err()); + assert!(from_str(&i64::MAX.to_string()).is_err()); + assert!(from_str(r#"{}"#).is_err()); + // pre-0.3.0 rustc-serialize format is now invalid + assert!(from_str(r#"{"ymdf":20}"#).is_err()); + assert!(from_str(r#"null"#).is_err()); +} + +#[cfg(feature = "rustc-serialize")] +mod rustc_serialize { + use super::NaiveDate; + use rustc_serialize::{Decodable, Decoder, Encodable, Encoder}; + + impl Encodable for NaiveDate { + fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { + format!("{:?}", self).encode(s) + } + } + + impl Decodable for NaiveDate { + fn decode<D: Decoder>(d: &mut D) -> Result<NaiveDate, D::Error> { + d.read_str()?.parse().map_err(|_| d.error("invalid date")) + } + } + + #[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); + } +} + +#[cfg(feature = "serde")] +mod serde { + use super::NaiveDate; + use core::fmt; + use serdelib::{de, ser}; + + // TODO not very optimized for space (binary formats would want something better) + + impl ser::Serialize for NaiveDate { + 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 NaiveDateVisitor; + + impl<'de> de::Visitor<'de> for NaiveDateVisitor { + type Value = NaiveDate; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + write!(formatter, "a formatted date string") + } + + #[cfg(any(feature = "std", test))] + fn visit_str<E>(self, value: &str) -> Result<NaiveDate, E> + where + E: de::Error, + { + value.parse().map_err(E::custom) + } + + #[cfg(not(any(feature = "std", test)))] + fn visit_str<E>(self, value: &str) -> Result<NaiveDate, E> + where + E: de::Error, + { + value.parse().map_err(E::custom) + } + } + + impl<'de> de::Deserialize<'de> for NaiveDate { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: de::Deserializer<'de>, + { + deserializer.deserialize_str(NaiveDateVisitor) + } + } + + #[cfg(test)] + extern crate bincode; + #[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)); + } + + #[test] + fn test_serde_bincode() { + // Bincode is relevant to test separately from JSON because + // it is not self-describing. + use self::bincode::{deserialize, serialize, Infinite}; + + let d = NaiveDate::from_ymd(2014, 7, 24); + let encoded = serialize(&d, Infinite).unwrap(); + let decoded: NaiveDate = deserialize(&encoded).unwrap(); + assert_eq!(d, decoded); + } +} + +#[cfg(test)] +mod tests { + use super::NaiveDate; + use super::{MAX_DATE, MAX_DAYS_FROM_YEAR_0, MAX_YEAR}; + use super::{MIN_DATE, MIN_DAYS_FROM_YEAR_0, MIN_YEAR}; + use oldtime::Duration; + use std::{i32, u32}; + use {Datelike, Weekday}; + + #[test] + fn test_date_from_ymd() { + let ymd_opt = |y, m, d| NaiveDate::from_ymd_opt(y, m, d); + + assert!(ymd_opt(2012, 0, 1).is_none()); + assert!(ymd_opt(2012, 1, 1).is_some()); + assert!(ymd_opt(2012, 2, 29).is_some()); + assert!(ymd_opt(2014, 2, 29).is_none()); + assert!(ymd_opt(2014, 3, 0).is_none()); + assert!(ymd_opt(2014, 3, 1).is_some()); + assert!(ymd_opt(2014, 3, 31).is_some()); + assert!(ymd_opt(2014, 3, 32).is_none()); + assert!(ymd_opt(2014, 12, 31).is_some()); + assert!(ymd_opt(2014, 13, 1).is_none()); + } + + #[test] + fn test_date_from_yo() { + let yo_opt = |y, o| NaiveDate::from_yo_opt(y, o); + let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); + + assert_eq!(yo_opt(2012, 0), None); + assert_eq!(yo_opt(2012, 1), Some(ymd(2012, 1, 1))); + assert_eq!(yo_opt(2012, 2), Some(ymd(2012, 1, 2))); + assert_eq!(yo_opt(2012, 32), Some(ymd(2012, 2, 1))); + assert_eq!(yo_opt(2012, 60), Some(ymd(2012, 2, 29))); + assert_eq!(yo_opt(2012, 61), Some(ymd(2012, 3, 1))); + assert_eq!(yo_opt(2012, 100), Some(ymd(2012, 4, 9))); + assert_eq!(yo_opt(2012, 200), Some(ymd(2012, 7, 18))); + assert_eq!(yo_opt(2012, 300), Some(ymd(2012, 10, 26))); + assert_eq!(yo_opt(2012, 366), Some(ymd(2012, 12, 31))); + assert_eq!(yo_opt(2012, 367), None); + + assert_eq!(yo_opt(2014, 0), None); + assert_eq!(yo_opt(2014, 1), Some(ymd(2014, 1, 1))); + assert_eq!(yo_opt(2014, 2), Some(ymd(2014, 1, 2))); + assert_eq!(yo_opt(2014, 32), Some(ymd(2014, 2, 1))); + assert_eq!(yo_opt(2014, 59), Some(ymd(2014, 2, 28))); + assert_eq!(yo_opt(2014, 60), Some(ymd(2014, 3, 1))); + assert_eq!(yo_opt(2014, 100), Some(ymd(2014, 4, 10))); + assert_eq!(yo_opt(2014, 200), Some(ymd(2014, 7, 19))); + assert_eq!(yo_opt(2014, 300), Some(ymd(2014, 10, 27))); + assert_eq!(yo_opt(2014, 365), Some(ymd(2014, 12, 31))); + assert_eq!(yo_opt(2014, 366), None); + } + + #[test] + fn test_date_from_isoywd() { + let isoywd_opt = |y, w, d| NaiveDate::from_isoywd_opt(y, w, d); + let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); + + assert_eq!(isoywd_opt(2004, 0, Weekday::Sun), None); + assert_eq!(isoywd_opt(2004, 1, Weekday::Mon), Some(ymd(2003, 12, 29))); + assert_eq!(isoywd_opt(2004, 1, Weekday::Sun), Some(ymd(2004, 1, 4))); + assert_eq!(isoywd_opt(2004, 2, Weekday::Mon), Some(ymd(2004, 1, 5))); + assert_eq!(isoywd_opt(2004, 2, Weekday::Sun), Some(ymd(2004, 1, 11))); + assert_eq!(isoywd_opt(2004, 52, Weekday::Mon), Some(ymd(2004, 12, 20))); + assert_eq!(isoywd_opt(2004, 52, Weekday::Sun), Some(ymd(2004, 12, 26))); + assert_eq!(isoywd_opt(2004, 53, Weekday::Mon), Some(ymd(2004, 12, 27))); + assert_eq!(isoywd_opt(2004, 53, Weekday::Sun), Some(ymd(2005, 1, 2))); + assert_eq!(isoywd_opt(2004, 54, Weekday::Mon), None); + + assert_eq!(isoywd_opt(2011, 0, Weekday::Sun), None); + assert_eq!(isoywd_opt(2011, 1, Weekday::Mon), Some(ymd(2011, 1, 3))); + assert_eq!(isoywd_opt(2011, 1, Weekday::Sun), Some(ymd(2011, 1, 9))); + assert_eq!(isoywd_opt(2011, 2, Weekday::Mon), Some(ymd(2011, 1, 10))); + assert_eq!(isoywd_opt(2011, 2, Weekday::Sun), Some(ymd(2011, 1, 16))); + + assert_eq!(isoywd_opt(2018, 51, Weekday::Mon), Some(ymd(2018, 12, 17))); + assert_eq!(isoywd_opt(2018, 51, Weekday::Sun), Some(ymd(2018, 12, 23))); + assert_eq!(isoywd_opt(2018, 52, Weekday::Mon), Some(ymd(2018, 12, 24))); + assert_eq!(isoywd_opt(2018, 52, Weekday::Sun), Some(ymd(2018, 12, 30))); + assert_eq!(isoywd_opt(2018, 53, Weekday::Mon), None); + } + + #[test] + fn test_date_from_isoywd_and_iso_week() { + for year in 2000..2401 { + for week in 1..54 { + for &weekday in [ + Weekday::Mon, + Weekday::Tue, + Weekday::Wed, + Weekday::Thu, + Weekday::Fri, + Weekday::Sat, + Weekday::Sun, + ] + .iter() + { + let d = NaiveDate::from_isoywd_opt(year, week, weekday); + if d.is_some() { + let d = d.unwrap(); + assert_eq!(d.weekday(), weekday); + let w = d.iso_week(); + assert_eq!(w.year(), year); + assert_eq!(w.week(), week); + } + } + } + } + + for year in 2000..2401 { + for month in 1..13 { + for day in 1..32 { + let d = NaiveDate::from_ymd_opt(year, month, day); + if d.is_some() { + let d = d.unwrap(); + let w = d.iso_week(); + let d_ = NaiveDate::from_isoywd(w.year(), w.week(), d.weekday()); + assert_eq!(d, d_); + } + } + } + } + } + + #[test] + fn test_date_from_num_days_from_ce() { + let from_ndays_from_ce = |days| NaiveDate::from_num_days_from_ce_opt(days); + assert_eq!(from_ndays_from_ce(1), Some(NaiveDate::from_ymd(1, 1, 1))); + assert_eq!(from_ndays_from_ce(2), Some(NaiveDate::from_ymd(1, 1, 2))); + assert_eq!(from_ndays_from_ce(31), Some(NaiveDate::from_ymd(1, 1, 31))); + assert_eq!(from_ndays_from_ce(32), Some(NaiveDate::from_ymd(1, 2, 1))); + assert_eq!(from_ndays_from_ce(59), Some(NaiveDate::from_ymd(1, 2, 28))); + assert_eq!(from_ndays_from_ce(60), Some(NaiveDate::from_ymd(1, 3, 1))); + assert_eq!(from_ndays_from_ce(365), Some(NaiveDate::from_ymd(1, 12, 31))); + assert_eq!(from_ndays_from_ce(365 * 1 + 1), Some(NaiveDate::from_ymd(2, 1, 1))); + assert_eq!(from_ndays_from_ce(365 * 2 + 1), Some(NaiveDate::from_ymd(3, 1, 1))); + assert_eq!(from_ndays_from_ce(365 * 3 + 1), Some(NaiveDate::from_ymd(4, 1, 1))); + assert_eq!(from_ndays_from_ce(365 * 4 + 2), Some(NaiveDate::from_ymd(5, 1, 1))); + assert_eq!(from_ndays_from_ce(146097 + 1), Some(NaiveDate::from_ymd(401, 1, 1))); + assert_eq!(from_ndays_from_ce(146097 * 5 + 1), Some(NaiveDate::from_ymd(2001, 1, 1))); + assert_eq!(from_ndays_from_ce(719163), Some(NaiveDate::from_ymd(1970, 1, 1))); + assert_eq!(from_ndays_from_ce(0), Some(NaiveDate::from_ymd(0, 12, 31))); // 1 BCE + assert_eq!(from_ndays_from_ce(-365), Some(NaiveDate::from_ymd(0, 1, 1))); + assert_eq!(from_ndays_from_ce(-366), Some(NaiveDate::from_ymd(-1, 12, 31))); // 2 BCE + + for days in (-9999..10001).map(|x| x * 100) { + assert_eq!(from_ndays_from_ce(days).map(|d| d.num_days_from_ce()), Some(days)); + } + + assert_eq!(from_ndays_from_ce(MIN_DATE.num_days_from_ce()), Some(MIN_DATE)); + assert_eq!(from_ndays_from_ce(MIN_DATE.num_days_from_ce() - 1), None); + assert_eq!(from_ndays_from_ce(MAX_DATE.num_days_from_ce()), Some(MAX_DATE)); + assert_eq!(from_ndays_from_ce(MAX_DATE.num_days_from_ce() + 1), None); + } + + #[test] + fn test_date_from_weekday_of_month_opt() { + let ymwd = |y, m, w, n| NaiveDate::from_weekday_of_month_opt(y, m, w, n); + assert_eq!(ymwd(2018, 8, Weekday::Tue, 0), None); + assert_eq!(ymwd(2018, 8, Weekday::Wed, 1), Some(NaiveDate::from_ymd(2018, 8, 1))); + assert_eq!(ymwd(2018, 8, Weekday::Thu, 1), Some(NaiveDate::from_ymd(2018, 8, 2))); + assert_eq!(ymwd(2018, 8, Weekday::Sun, 1), Some(NaiveDate::from_ymd(2018, 8, 5))); + assert_eq!(ymwd(2018, 8, Weekday::Mon, 1), Some(NaiveDate::from_ymd(2018, 8, 6))); + assert_eq!(ymwd(2018, 8, Weekday::Tue, 1), Some(NaiveDate::from_ymd(2018, 8, 7))); + assert_eq!(ymwd(2018, 8, Weekday::Wed, 2), Some(NaiveDate::from_ymd(2018, 8, 8))); + assert_eq!(ymwd(2018, 8, Weekday::Sun, 2), Some(NaiveDate::from_ymd(2018, 8, 12))); + assert_eq!(ymwd(2018, 8, Weekday::Thu, 3), Some(NaiveDate::from_ymd(2018, 8, 16))); + assert_eq!(ymwd(2018, 8, Weekday::Thu, 4), Some(NaiveDate::from_ymd(2018, 8, 23))); + assert_eq!(ymwd(2018, 8, Weekday::Thu, 5), Some(NaiveDate::from_ymd(2018, 8, 30))); + assert_eq!(ymwd(2018, 8, Weekday::Fri, 5), Some(NaiveDate::from_ymd(2018, 8, 31))); + assert_eq!(ymwd(2018, 8, Weekday::Sat, 5), None); + } + + #[test] + fn test_date_fields() { + fn check(year: i32, month: u32, day: u32, ordinal: u32) { + let d1 = NaiveDate::from_ymd(year, month, day); + assert_eq!(d1.year(), year); + assert_eq!(d1.month(), month); + assert_eq!(d1.day(), day); + assert_eq!(d1.ordinal(), ordinal); + + let d2 = NaiveDate::from_yo(year, ordinal); + assert_eq!(d2.year(), year); + assert_eq!(d2.month(), month); + assert_eq!(d2.day(), day); + assert_eq!(d2.ordinal(), ordinal); + + assert_eq!(d1, d2); + } + + check(2012, 1, 1, 1); + check(2012, 1, 2, 2); + check(2012, 2, 1, 32); + check(2012, 2, 29, 60); + check(2012, 3, 1, 61); + check(2012, 4, 9, 100); + check(2012, 7, 18, 200); + check(2012, 10, 26, 300); + check(2012, 12, 31, 366); + + check(2014, 1, 1, 1); + check(2014, 1, 2, 2); + check(2014, 2, 1, 32); + check(2014, 2, 28, 59); + check(2014, 3, 1, 60); + check(2014, 4, 10, 100); + check(2014, 7, 19, 200); + check(2014, 10, 27, 300); + check(2014, 12, 31, 365); + } + + #[test] + fn test_date_weekday() { + assert_eq!(NaiveDate::from_ymd(1582, 10, 15).weekday(), Weekday::Fri); + // May 20, 1875 = ISO 8601 reference date + assert_eq!(NaiveDate::from_ymd(1875, 5, 20).weekday(), Weekday::Thu); + assert_eq!(NaiveDate::from_ymd(2000, 1, 1).weekday(), Weekday::Sat); + } + + #[test] + fn test_date_with_fields() { + let d = NaiveDate::from_ymd(2000, 2, 29); + assert_eq!(d.with_year(-400), Some(NaiveDate::from_ymd(-400, 2, 29))); + assert_eq!(d.with_year(-100), None); + assert_eq!(d.with_year(1600), Some(NaiveDate::from_ymd(1600, 2, 29))); + assert_eq!(d.with_year(1900), None); + assert_eq!(d.with_year(2000), Some(NaiveDate::from_ymd(2000, 2, 29))); + assert_eq!(d.with_year(2001), None); + assert_eq!(d.with_year(2004), Some(NaiveDate::from_ymd(2004, 2, 29))); + assert_eq!(d.with_year(i32::MAX), None); + + let d = NaiveDate::from_ymd(2000, 4, 30); + assert_eq!(d.with_month(0), None); + assert_eq!(d.with_month(1), Some(NaiveDate::from_ymd(2000, 1, 30))); + assert_eq!(d.with_month(2), None); + assert_eq!(d.with_month(3), Some(NaiveDate::from_ymd(2000, 3, 30))); + assert_eq!(d.with_month(4), Some(NaiveDate::from_ymd(2000, 4, 30))); + assert_eq!(d.with_month(12), Some(NaiveDate::from_ymd(2000, 12, 30))); + assert_eq!(d.with_month(13), None); + assert_eq!(d.with_month(u32::MAX), None); + + let d = NaiveDate::from_ymd(2000, 2, 8); + assert_eq!(d.with_day(0), None); + assert_eq!(d.with_day(1), Some(NaiveDate::from_ymd(2000, 2, 1))); + assert_eq!(d.with_day(29), Some(NaiveDate::from_ymd(2000, 2, 29))); + assert_eq!(d.with_day(30), None); + assert_eq!(d.with_day(u32::MAX), None); + + let d = NaiveDate::from_ymd(2000, 5, 5); + assert_eq!(d.with_ordinal(0), None); + assert_eq!(d.with_ordinal(1), Some(NaiveDate::from_ymd(2000, 1, 1))); + assert_eq!(d.with_ordinal(60), Some(NaiveDate::from_ymd(2000, 2, 29))); + assert_eq!(d.with_ordinal(61), Some(NaiveDate::from_ymd(2000, 3, 1))); + assert_eq!(d.with_ordinal(366), Some(NaiveDate::from_ymd(2000, 12, 31))); + assert_eq!(d.with_ordinal(367), None); + assert_eq!(d.with_ordinal(u32::MAX), None); + } + + #[test] + fn test_date_num_days_from_ce() { + assert_eq!(NaiveDate::from_ymd(1, 1, 1).num_days_from_ce(), 1); + + for year in -9999..10001 { + assert_eq!( + NaiveDate::from_ymd(year, 1, 1).num_days_from_ce(), + NaiveDate::from_ymd(year - 1, 12, 31).num_days_from_ce() + 1 + ); + } + } + + #[test] + fn test_date_succ() { + let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); + assert_eq!(ymd(2014, 5, 6).succ_opt(), Some(ymd(2014, 5, 7))); + assert_eq!(ymd(2014, 5, 31).succ_opt(), Some(ymd(2014, 6, 1))); + assert_eq!(ymd(2014, 12, 31).succ_opt(), Some(ymd(2015, 1, 1))); + assert_eq!(ymd(2016, 2, 28).succ_opt(), Some(ymd(2016, 2, 29))); + assert_eq!(ymd(MAX_DATE.year(), 12, 31).succ_opt(), None); + } + + #[test] + fn test_date_pred() { + let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); + assert_eq!(ymd(2016, 3, 1).pred_opt(), Some(ymd(2016, 2, 29))); + assert_eq!(ymd(2015, 1, 1).pred_opt(), Some(ymd(2014, 12, 31))); + assert_eq!(ymd(2014, 6, 1).pred_opt(), Some(ymd(2014, 5, 31))); + assert_eq!(ymd(2014, 5, 7).pred_opt(), Some(ymd(2014, 5, 6))); + assert_eq!(ymd(MIN_DATE.year(), 1, 1).pred_opt(), None); + } + + #[test] + fn test_date_add() { + fn check((y1, m1, d1): (i32, u32, u32), rhs: Duration, ymd: Option<(i32, u32, u32)>) { + let lhs = NaiveDate::from_ymd(y1, m1, d1); + let sum = ymd.map(|(y, m, d)| NaiveDate::from_ymd(y, m, d)); + assert_eq!(lhs.checked_add_signed(rhs), sum); + assert_eq!(lhs.checked_sub_signed(-rhs), sum); + } + + check((2014, 1, 1), Duration::zero(), Some((2014, 1, 1))); + check((2014, 1, 1), Duration::seconds(86399), Some((2014, 1, 1))); + // always round towards zero + check((2014, 1, 1), Duration::seconds(-86399), Some((2014, 1, 1))); + check((2014, 1, 1), Duration::days(1), Some((2014, 1, 2))); + check((2014, 1, 1), Duration::days(-1), Some((2013, 12, 31))); + check((2014, 1, 1), Duration::days(364), Some((2014, 12, 31))); + check((2014, 1, 1), Duration::days(365 * 4 + 1), Some((2018, 1, 1))); + check((2014, 1, 1), Duration::days(365 * 400 + 97), Some((2414, 1, 1))); + + check((-7, 1, 1), Duration::days(365 * 12 + 3), Some((5, 1, 1))); + + // overflow check + check((0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64), Some((MAX_YEAR, 12, 31))); + check((0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64 + 1), None); + check((0, 1, 1), Duration::max_value(), None); + check((0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64), Some((MIN_YEAR, 1, 1))); + check((0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64 - 1), None); + check((0, 1, 1), Duration::min_value(), None); + } + + #[test] + fn test_date_sub() { + fn check((y1, m1, d1): (i32, u32, u32), (y2, m2, d2): (i32, u32, u32), diff: Duration) { + let lhs = NaiveDate::from_ymd(y1, m1, d1); + let rhs = NaiveDate::from_ymd(y2, m2, d2); + assert_eq!(lhs.signed_duration_since(rhs), diff); + assert_eq!(rhs.signed_duration_since(lhs), -diff); + } + + check((2014, 1, 1), (2014, 1, 1), Duration::zero()); + check((2014, 1, 2), (2014, 1, 1), Duration::days(1)); + check((2014, 12, 31), (2014, 1, 1), Duration::days(364)); + check((2015, 1, 3), (2014, 1, 1), Duration::days(365 + 2)); + check((2018, 1, 1), (2014, 1, 1), Duration::days(365 * 4 + 1)); + check((2414, 1, 1), (2014, 1, 1), Duration::days(365 * 400 + 97)); + + check((MAX_YEAR, 12, 31), (0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64)); + check((MIN_YEAR, 1, 1), (0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64)); + } + + #[test] + fn test_date_addassignment() { + let ymd = NaiveDate::from_ymd; + let mut date = ymd(2016, 10, 1); + date += Duration::days(10); + assert_eq!(date, ymd(2016, 10, 11)); + date += Duration::days(30); + assert_eq!(date, ymd(2016, 11, 10)); + } + + #[test] + fn test_date_subassignment() { + let ymd = NaiveDate::from_ymd; + let mut date = ymd(2016, 10, 11); + date -= Duration::days(10); + assert_eq!(date, ymd(2016, 10, 1)); + date -= Duration::days(2); + assert_eq!(date, ymd(2016, 9, 29)); + } + + #[test] + fn test_date_fmt() { + assert_eq!(format!("{:?}", NaiveDate::from_ymd(2012, 3, 4)), "2012-03-04"); + assert_eq!(format!("{:?}", NaiveDate::from_ymd(0, 3, 4)), "0000-03-04"); + assert_eq!(format!("{:?}", NaiveDate::from_ymd(-307, 3, 4)), "-0307-03-04"); + assert_eq!(format!("{:?}", NaiveDate::from_ymd(12345, 3, 4)), "+12345-03-04"); + + assert_eq!(NaiveDate::from_ymd(2012, 3, 4).to_string(), "2012-03-04"); + assert_eq!(NaiveDate::from_ymd(0, 3, 4).to_string(), "0000-03-04"); + assert_eq!(NaiveDate::from_ymd(-307, 3, 4).to_string(), "-0307-03-04"); + assert_eq!(NaiveDate::from_ymd(12345, 3, 4).to_string(), "+12345-03-04"); + + // the format specifier should have no effect on `NaiveTime` + assert_eq!(format!("{:+30?}", NaiveDate::from_ymd(1234, 5, 6)), "1234-05-06"); + assert_eq!(format!("{:30?}", NaiveDate::from_ymd(12345, 6, 7)), "+12345-06-07"); + } + + #[test] + fn test_date_from_str() { + // valid cases + let valid = [ + "-0000000123456-1-2", + " -123456 - 1 - 2 ", + "-12345-1-2", + "-1234-12-31", + "-7-6-5", + "350-2-28", + "360-02-29", + "0360-02-29", + "2015-2 -18", + "+70-2-18", + "+70000-2-18", + "+00007-2-18", + ]; + for &s in &valid { + let d = match s.parse::<NaiveDate>() { + 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::<NaiveDate>() { + 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::<NaiveDate>().is_err()); + assert!("x".parse::<NaiveDate>().is_err()); + assert!("2014".parse::<NaiveDate>().is_err()); + assert!("2014-01".parse::<NaiveDate>().is_err()); + assert!("2014-01-00".parse::<NaiveDate>().is_err()); + assert!("2014-13-57".parse::<NaiveDate>().is_err()); + assert!("9999999-9-9".parse::<NaiveDate>().is_err()); // out-of-bounds + } + + #[test] + fn test_date_parse_from_str() { + let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); + assert_eq!( + NaiveDate::parse_from_str("2014-5-7T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), + Ok(ymd(2014, 5, 7)) + ); // ignore time and offset + assert_eq!( + NaiveDate::parse_from_str("2015-W06-1=2015-033", "%G-W%V-%u = %Y-%j"), + Ok(ymd(2015, 2, 2)) + ); + assert_eq!( + NaiveDate::parse_from_str("Fri, 09 Aug 13", "%a, %d %b %y"), + Ok(ymd(2013, 8, 9)) + ); + assert!(NaiveDate::parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); + assert!(NaiveDate::parse_from_str("2014-57", "%Y-%m-%d").is_err()); + assert!(NaiveDate::parse_from_str("2014", "%Y").is_err()); // insufficient + } + + #[test] + fn test_date_format() { + let d = NaiveDate::from_ymd(2012, 3, 4); + assert_eq!(d.format("%Y,%C,%y,%G,%g").to_string(), "2012,20,12,2012,12"); + assert_eq!(d.format("%m,%b,%h,%B").to_string(), "03,Mar,Mar,March"); + assert_eq!(d.format("%d,%e").to_string(), "04, 4"); + assert_eq!(d.format("%U,%W,%V").to_string(), "10,09,09"); + assert_eq!(d.format("%a,%A,%w,%u").to_string(), "Sun,Sunday,0,7"); + assert_eq!(d.format("%j").to_string(), "064"); // since 2012 is a leap year + assert_eq!(d.format("%D,%x").to_string(), "03/04/12,03/04/12"); + assert_eq!(d.format("%F").to_string(), "2012-03-04"); + assert_eq!(d.format("%v").to_string(), " 4-Mar-2012"); + assert_eq!(d.format("%t%n%%%n%t").to_string(), "\t\n%\n\t"); + + // non-four-digit years + assert_eq!(NaiveDate::from_ymd(12345, 1, 1).format("%Y").to_string(), "+12345"); + assert_eq!(NaiveDate::from_ymd(1234, 1, 1).format("%Y").to_string(), "1234"); + assert_eq!(NaiveDate::from_ymd(123, 1, 1).format("%Y").to_string(), "0123"); + assert_eq!(NaiveDate::from_ymd(12, 1, 1).format("%Y").to_string(), "0012"); + assert_eq!(NaiveDate::from_ymd(1, 1, 1).format("%Y").to_string(), "0001"); + assert_eq!(NaiveDate::from_ymd(0, 1, 1).format("%Y").to_string(), "0000"); + assert_eq!(NaiveDate::from_ymd(-1, 1, 1).format("%Y").to_string(), "-0001"); + assert_eq!(NaiveDate::from_ymd(-12, 1, 1).format("%Y").to_string(), "-0012"); + assert_eq!(NaiveDate::from_ymd(-123, 1, 1).format("%Y").to_string(), "-0123"); + assert_eq!(NaiveDate::from_ymd(-1234, 1, 1).format("%Y").to_string(), "-1234"); + assert_eq!(NaiveDate::from_ymd(-12345, 1, 1).format("%Y").to_string(), "-12345"); + + // corner cases + assert_eq!( + NaiveDate::from_ymd(2007, 12, 31).format("%G,%g,%U,%W,%V").to_string(), + "2008,08,53,53,01" + ); + assert_eq!( + NaiveDate::from_ymd(2010, 1, 3).format("%G,%g,%U,%W,%V").to_string(), + "2009,09,01,00,53" + ); + } + + #[test] + fn test_day_iterator_limit() { + assert_eq!( + NaiveDate::from_ymd(262143, 12, 29).iter_days().take(4).collect::<Vec<_>>().len(), + 2 + ); + } + + #[test] + fn test_week_iterator_limit() { + assert_eq!( + NaiveDate::from_ymd(262143, 12, 12).iter_weeks().take(4).collect::<Vec<_>>().len(), + 2 + ); + } +} diff --git a/third_party/rust/chrono/src/naive/datetime.rs b/third_party/rust/chrono/src/naive/datetime.rs new file mode 100644 index 0000000000..92d6c28554 --- /dev/null +++ b/third_party/rust/chrono/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) + ); + } +} diff --git a/third_party/rust/chrono/src/naive/internals.rs b/third_party/rust/chrono/src/naive/internals.rs new file mode 100644 index 0000000000..346063c375 --- /dev/null +++ b/third_party/rust/chrono/src/naive/internals.rs @@ -0,0 +1,815 @@ +// This is a part of Chrono. +// See README.md and LICENSE.txt for details. + +//! The internal implementation of the calendar and ordinal date. +//! +//! The current implementation is optimized for determining year, month, day and day of week. +//! 4-bit `YearFlags` map to one of 14 possible classes of year in the Gregorian calendar, +//! which are included in every packed `NaiveDate` instance. +//! The conversion between the packed calendar date (`Mdf`) and the ordinal date (`Of`) is +//! based on the moderately-sized lookup table (~1.5KB) +//! and the packed representation is chosen for the efficient lookup. +//! Every internal data structure does not validate its input, +//! but the conversion keeps the valid value valid and the invalid value invalid +//! so that the user-facing `NaiveDate` can validate the input as late as possible. + +#![allow(dead_code)] // some internal methods have been left for consistency +#![cfg_attr(feature = "__internal_bench", allow(missing_docs))] + +use core::{fmt, i32}; +use div::{div_rem, mod_floor}; +use num_traits::FromPrimitive; +use Weekday; + +/// The internal date representation. This also includes the packed `Mdf` value. +pub type DateImpl = i32; + +pub const MAX_YEAR: DateImpl = i32::MAX >> 13; +pub const MIN_YEAR: DateImpl = i32::MIN >> 13; + +/// The year flags (aka the dominical letter). +/// +/// There are 14 possible classes of year in the Gregorian calendar: +/// common and leap years starting with Monday through Sunday. +/// The `YearFlags` stores this information into 4 bits `abbb`, +/// where `a` is `1` for the common year (simplifies the `Of` validation) +/// and `bbb` is a non-zero `Weekday` (mapping `Mon` to 7) of the last day in the past year +/// (simplifies the day of week calculation from the 1-based ordinal). +#[derive(PartialEq, Eq, Copy, Clone)] +pub struct YearFlags(pub u8); + +pub const A: YearFlags = YearFlags(0o15); +pub const AG: YearFlags = YearFlags(0o05); +pub const B: YearFlags = YearFlags(0o14); +pub const BA: YearFlags = YearFlags(0o04); +pub const C: YearFlags = YearFlags(0o13); +pub const CB: YearFlags = YearFlags(0o03); +pub const D: YearFlags = YearFlags(0o12); +pub const DC: YearFlags = YearFlags(0o02); +pub const E: YearFlags = YearFlags(0o11); +pub const ED: YearFlags = YearFlags(0o01); +pub const F: YearFlags = YearFlags(0o17); +pub const FE: YearFlags = YearFlags(0o07); +pub const G: YearFlags = YearFlags(0o16); +pub const GF: YearFlags = YearFlags(0o06); + +static YEAR_TO_FLAGS: [YearFlags; 400] = [ + BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, + G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, + F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, + E, DC, B, A, G, FE, D, C, B, AG, F, E, D, // 100 + C, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, + B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, + A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, + G, FE, D, C, B, AG, F, E, D, CB, A, G, F, // 200 + E, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, + D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, + C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, + B, AG, F, E, D, CB, A, G, F, ED, C, B, A, // 300 + G, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, + F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, + E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, + D, CB, A, G, F, ED, C, B, A, GF, E, D, C, // 400 +]; + +static YEAR_DELTAS: [u8; 401] = [ + 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, + 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, + 15, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, + 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, // 100 + 25, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, + 30, 31, 31, 31, 31, 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35, 36, 36, 36, + 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39, 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, + 42, 43, 43, 43, 43, 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, 48, 48, 48, + 48, 49, 49, 49, // 200 + 49, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, 52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, + 54, 55, 55, 55, 55, 56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59, 60, 60, 60, + 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63, 64, 64, 64, 64, 65, 65, 65, 65, 66, 66, 66, + 66, 67, 67, 67, 67, 68, 68, 68, 68, 69, 69, 69, 69, 70, 70, 70, 70, 71, 71, 71, 71, 72, 72, 72, + 72, 73, 73, 73, // 300 + 73, 73, 73, 73, 73, 74, 74, 74, 74, 75, 75, 75, 75, 76, 76, 76, 76, 77, 77, 77, 77, 78, 78, 78, + 78, 79, 79, 79, 79, 80, 80, 80, 80, 81, 81, 81, 81, 82, 82, 82, 82, 83, 83, 83, 83, 84, 84, 84, + 84, 85, 85, 85, 85, 86, 86, 86, 86, 87, 87, 87, 87, 88, 88, 88, 88, 89, 89, 89, 89, 90, 90, 90, + 90, 91, 91, 91, 91, 92, 92, 92, 92, 93, 93, 93, 93, 94, 94, 94, 94, 95, 95, 95, 95, 96, 96, 96, + 96, 97, 97, 97, 97, // 400+1 +]; + +pub fn cycle_to_yo(cycle: u32) -> (u32, u32) { + let (mut year_mod_400, mut ordinal0) = div_rem(cycle, 365); + let delta = u32::from(YEAR_DELTAS[year_mod_400 as usize]); + if ordinal0 < delta { + year_mod_400 -= 1; + ordinal0 += 365 - u32::from(YEAR_DELTAS[year_mod_400 as usize]); + } else { + ordinal0 -= delta; + } + (year_mod_400, ordinal0 + 1) +} + +pub fn yo_to_cycle(year_mod_400: u32, ordinal: u32) -> u32 { + year_mod_400 * 365 + u32::from(YEAR_DELTAS[year_mod_400 as usize]) + ordinal - 1 +} + +impl YearFlags { + #[inline] + pub fn from_year(year: i32) -> YearFlags { + let year = mod_floor(year, 400); + YearFlags::from_year_mod_400(year) + } + + #[inline] + pub fn from_year_mod_400(year: i32) -> YearFlags { + YEAR_TO_FLAGS[year as usize] + } + + #[inline] + pub fn ndays(&self) -> u32 { + let YearFlags(flags) = *self; + 366 - u32::from(flags >> 3) + } + + #[inline] + pub fn isoweek_delta(&self) -> u32 { + let YearFlags(flags) = *self; + let mut delta = u32::from(flags) & 0b0111; + if delta < 3 { + delta += 7; + } + delta + } + + #[inline] + pub fn nisoweeks(&self) -> u32 { + let YearFlags(flags) = *self; + 52 + ((0b0000_0100_0000_0110 >> flags as usize) & 1) + } +} + +impl fmt::Debug for YearFlags { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let YearFlags(flags) = *self; + match flags { + 0o15 => "A".fmt(f), + 0o05 => "AG".fmt(f), + 0o14 => "B".fmt(f), + 0o04 => "BA".fmt(f), + 0o13 => "C".fmt(f), + 0o03 => "CB".fmt(f), + 0o12 => "D".fmt(f), + 0o02 => "DC".fmt(f), + 0o11 => "E".fmt(f), + 0o01 => "ED".fmt(f), + 0o10 => "F?".fmt(f), + 0o00 => "FE?".fmt(f), // non-canonical + 0o17 => "F".fmt(f), + 0o07 => "FE".fmt(f), + 0o16 => "G".fmt(f), + 0o06 => "GF".fmt(f), + _ => write!(f, "YearFlags({})", flags), + } + } +} + +pub const MIN_OL: u32 = 1 << 1; +pub const MAX_OL: u32 = 366 << 1; // larger than the non-leap last day `(365 << 1) | 1` +pub const MIN_MDL: u32 = (1 << 6) | (1 << 1); +pub const MAX_MDL: u32 = (12 << 6) | (31 << 1) | 1; + +const XX: i8 = -128; +static MDL_TO_OL: [i8; MAX_MDL as usize + 1] = [ + XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, + XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, + XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, // 0 + XX, XX, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, + 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, + 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, // 1 + XX, XX, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, + 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, + 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, XX, XX, XX, XX, XX, // 2 + XX, XX, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, + 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, + 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, // 3 + XX, XX, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, + 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, + 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, XX, XX, // 4 + XX, XX, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, + 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, + 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, // 5 + XX, XX, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, + 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, + 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, XX, XX, // 6 + XX, XX, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, + 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, + 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, // 7 + XX, XX, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, + 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, + 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, // 8 + XX, XX, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, + 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, + 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, XX, XX, // 9 + XX, XX, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, + 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, + 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, // 10 + XX, XX, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, + 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, + 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, XX, XX, // 11 + XX, XX, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, + 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, + 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, + 100, // 12 +]; + +static OL_TO_MDL: [u8; MAX_OL as usize + 1] = [ + 0, 0, // 0 + 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, + 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, + 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, // 1 + 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, + 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, + 66, 66, 66, 66, 66, 66, 66, 66, 66, // 2 + 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, + 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, + 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, // 3 + 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, + 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, + 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, // 4 + 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, + 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, + 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, // 5 + 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, + 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, + 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, // 6 + 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, + 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, + 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, // 7 + 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, + 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, + 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, // 8 + 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, + 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, + 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, // 9 + 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, + 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, + 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, // 10 + 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, + 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, + 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, // 11 + 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, + 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, + 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, 98, 100, + 98, // 12 +]; + +/// Ordinal (day of year) and year flags: `(ordinal << 4) | flags`. +/// +/// The whole bits except for the least 3 bits are referred as `Ol` (ordinal and leap flag), +/// which is an index to the `OL_TO_MDL` lookup table. +#[derive(PartialEq, PartialOrd, Copy, Clone)] +pub struct Of(pub u32); + +impl Of { + #[inline] + fn clamp_ordinal(ordinal: u32) -> u32 { + if ordinal > 366 { + 0 + } else { + ordinal + } + } + + #[inline] + pub fn new(ordinal: u32, YearFlags(flags): YearFlags) -> Of { + let ordinal = Of::clamp_ordinal(ordinal); + Of((ordinal << 4) | u32::from(flags)) + } + + #[inline] + pub fn from_mdf(Mdf(mdf): Mdf) -> Of { + let mdl = mdf >> 3; + match MDL_TO_OL.get(mdl as usize) { + Some(&v) => Of(mdf.wrapping_sub((i32::from(v) as u32 & 0x3ff) << 3)), + None => Of(0), + } + } + + #[inline] + pub fn valid(&self) -> bool { + let Of(of) = *self; + let ol = of >> 3; + MIN_OL <= ol && ol <= MAX_OL + } + + #[inline] + pub fn ordinal(&self) -> u32 { + let Of(of) = *self; + of >> 4 + } + + #[inline] + pub fn with_ordinal(&self, ordinal: u32) -> Of { + let ordinal = Of::clamp_ordinal(ordinal); + let Of(of) = *self; + Of((of & 0b1111) | (ordinal << 4)) + } + + #[inline] + pub fn flags(&self) -> YearFlags { + let Of(of) = *self; + YearFlags((of & 0b1111) as u8) + } + + #[inline] + pub fn with_flags(&self, YearFlags(flags): YearFlags) -> Of { + let Of(of) = *self; + Of((of & !0b1111) | u32::from(flags)) + } + + #[inline] + pub fn weekday(&self) -> Weekday { + let Of(of) = *self; + Weekday::from_u32(((of >> 4) + (of & 0b111)) % 7).unwrap() + } + + #[inline] + pub fn isoweekdate_raw(&self) -> (u32, Weekday) { + // week ordinal = ordinal + delta + let Of(of) = *self; + let weekord = (of >> 4).wrapping_add(self.flags().isoweek_delta()); + (weekord / 7, Weekday::from_u32(weekord % 7).unwrap()) + } + + #[inline] + pub fn to_mdf(&self) -> Mdf { + Mdf::from_of(*self) + } + + #[inline] + pub fn succ(&self) -> Of { + let Of(of) = *self; + Of(of + (1 << 4)) + } + + #[inline] + pub fn pred(&self) -> Of { + let Of(of) = *self; + Of(of - (1 << 4)) + } +} + +impl fmt::Debug for Of { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let Of(of) = *self; + write!( + f, + "Of(({} << 4) | {:#04o} /*{:?}*/)", + of >> 4, + of & 0b1111, + YearFlags((of & 0b1111) as u8) + ) + } +} + +/// Month, day of month and year flags: `(month << 9) | (day << 4) | flags` +/// +/// The whole bits except for the least 3 bits are referred as `Mdl` +/// (month, day of month and leap flag), +/// which is an index to the `MDL_TO_OL` lookup table. +#[derive(PartialEq, PartialOrd, Copy, Clone)] +pub struct Mdf(pub u32); + +impl Mdf { + #[inline] + fn clamp_month(month: u32) -> u32 { + if month > 12 { + 0 + } else { + month + } + } + + #[inline] + fn clamp_day(day: u32) -> u32 { + if day > 31 { + 0 + } else { + day + } + } + + #[inline] + pub fn new(month: u32, day: u32, YearFlags(flags): YearFlags) -> Mdf { + let month = Mdf::clamp_month(month); + let day = Mdf::clamp_day(day); + Mdf((month << 9) | (day << 4) | u32::from(flags)) + } + + #[inline] + pub fn from_of(Of(of): Of) -> Mdf { + let ol = of >> 3; + match OL_TO_MDL.get(ol as usize) { + Some(&v) => Mdf(of + (u32::from(v) << 3)), + None => Mdf(0), + } + } + + #[inline] + pub fn valid(&self) -> bool { + let Mdf(mdf) = *self; + let mdl = mdf >> 3; + match MDL_TO_OL.get(mdl as usize) { + Some(&v) => v >= 0, + None => false, + } + } + + #[inline] + pub fn month(&self) -> u32 { + let Mdf(mdf) = *self; + mdf >> 9 + } + + #[inline] + pub fn with_month(&self, month: u32) -> Mdf { + let month = Mdf::clamp_month(month); + let Mdf(mdf) = *self; + Mdf((mdf & 0b1_1111_1111) | (month << 9)) + } + + #[inline] + pub fn day(&self) -> u32 { + let Mdf(mdf) = *self; + (mdf >> 4) & 0b1_1111 + } + + #[inline] + pub fn with_day(&self, day: u32) -> Mdf { + let day = Mdf::clamp_day(day); + let Mdf(mdf) = *self; + Mdf((mdf & !0b1_1111_0000) | (day << 4)) + } + + #[inline] + pub fn flags(&self) -> YearFlags { + let Mdf(mdf) = *self; + YearFlags((mdf & 0b1111) as u8) + } + + #[inline] + pub fn with_flags(&self, YearFlags(flags): YearFlags) -> Mdf { + let Mdf(mdf) = *self; + Mdf((mdf & !0b1111) | u32::from(flags)) + } + + #[inline] + pub fn to_of(&self) -> Of { + Of::from_mdf(*self) + } +} + +impl fmt::Debug for Mdf { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let Mdf(mdf) = *self; + write!( + f, + "Mdf(({} << 9) | ({} << 4) | {:#04o} /*{:?}*/)", + mdf >> 9, + (mdf >> 4) & 0b1_1111, + mdf & 0b1111, + YearFlags((mdf & 0b1111) as u8) + ) + } +} + +#[cfg(test)] +mod tests { + #[cfg(test)] + extern crate num_iter; + + use self::num_iter::range_inclusive; + use super::{Mdf, Of}; + use super::{YearFlags, A, AG, B, BA, C, CB, D, DC, E, ED, F, FE, G, GF}; + use std::u32; + use Weekday; + + const NONLEAP_FLAGS: [YearFlags; 7] = [A, B, C, D, E, F, G]; + const LEAP_FLAGS: [YearFlags; 7] = [AG, BA, CB, DC, ED, FE, GF]; + const FLAGS: [YearFlags; 14] = [A, B, C, D, E, F, G, AG, BA, CB, DC, ED, FE, GF]; + + #[test] + fn test_year_flags_ndays_from_year() { + assert_eq!(YearFlags::from_year(2014).ndays(), 365); + assert_eq!(YearFlags::from_year(2012).ndays(), 366); + assert_eq!(YearFlags::from_year(2000).ndays(), 366); + assert_eq!(YearFlags::from_year(1900).ndays(), 365); + assert_eq!(YearFlags::from_year(1600).ndays(), 366); + assert_eq!(YearFlags::from_year(1).ndays(), 365); + assert_eq!(YearFlags::from_year(0).ndays(), 366); // 1 BCE (proleptic Gregorian) + assert_eq!(YearFlags::from_year(-1).ndays(), 365); // 2 BCE + assert_eq!(YearFlags::from_year(-4).ndays(), 366); // 5 BCE + assert_eq!(YearFlags::from_year(-99).ndays(), 365); // 100 BCE + assert_eq!(YearFlags::from_year(-100).ndays(), 365); // 101 BCE + assert_eq!(YearFlags::from_year(-399).ndays(), 365); // 400 BCE + assert_eq!(YearFlags::from_year(-400).ndays(), 366); // 401 BCE + } + + #[test] + fn test_year_flags_nisoweeks() { + assert_eq!(A.nisoweeks(), 52); + assert_eq!(B.nisoweeks(), 52); + assert_eq!(C.nisoweeks(), 52); + assert_eq!(D.nisoweeks(), 53); + assert_eq!(E.nisoweeks(), 52); + assert_eq!(F.nisoweeks(), 52); + assert_eq!(G.nisoweeks(), 52); + assert_eq!(AG.nisoweeks(), 52); + assert_eq!(BA.nisoweeks(), 52); + assert_eq!(CB.nisoweeks(), 52); + assert_eq!(DC.nisoweeks(), 53); + assert_eq!(ED.nisoweeks(), 53); + assert_eq!(FE.nisoweeks(), 52); + assert_eq!(GF.nisoweeks(), 52); + } + + #[test] + fn test_of() { + fn check(expected: bool, flags: YearFlags, ordinal1: u32, ordinal2: u32) { + for ordinal in range_inclusive(ordinal1, ordinal2) { + let of = Of::new(ordinal, flags); + assert!( + of.valid() == expected, + "ordinal {} = {:?} should be {} for dominical year {:?}", + ordinal, + of, + if expected { "valid" } else { "invalid" }, + flags + ); + } + } + + for &flags in NONLEAP_FLAGS.iter() { + check(false, flags, 0, 0); + check(true, flags, 1, 365); + check(false, flags, 366, 1024); + check(false, flags, u32::MAX, u32::MAX); + } + + for &flags in LEAP_FLAGS.iter() { + check(false, flags, 0, 0); + check(true, flags, 1, 366); + check(false, flags, 367, 1024); + check(false, flags, u32::MAX, u32::MAX); + } + } + + #[test] + fn test_mdf_valid() { + fn check(expected: bool, flags: YearFlags, month1: u32, day1: u32, month2: u32, day2: u32) { + for month in range_inclusive(month1, month2) { + for day in range_inclusive(day1, day2) { + let mdf = Mdf::new(month, day, flags); + assert!( + mdf.valid() == expected, + "month {} day {} = {:?} should be {} for dominical year {:?}", + month, + day, + mdf, + if expected { "valid" } else { "invalid" }, + flags + ); + } + } + } + + for &flags in NONLEAP_FLAGS.iter() { + check(false, flags, 0, 0, 0, 1024); + check(false, flags, 0, 0, 16, 0); + check(true, flags, 1, 1, 1, 31); + check(false, flags, 1, 32, 1, 1024); + check(true, flags, 2, 1, 2, 28); + check(false, flags, 2, 29, 2, 1024); + check(true, flags, 3, 1, 3, 31); + check(false, flags, 3, 32, 3, 1024); + check(true, flags, 4, 1, 4, 30); + check(false, flags, 4, 31, 4, 1024); + check(true, flags, 5, 1, 5, 31); + check(false, flags, 5, 32, 5, 1024); + check(true, flags, 6, 1, 6, 30); + check(false, flags, 6, 31, 6, 1024); + check(true, flags, 7, 1, 7, 31); + check(false, flags, 7, 32, 7, 1024); + check(true, flags, 8, 1, 8, 31); + check(false, flags, 8, 32, 8, 1024); + check(true, flags, 9, 1, 9, 30); + check(false, flags, 9, 31, 9, 1024); + check(true, flags, 10, 1, 10, 31); + check(false, flags, 10, 32, 10, 1024); + check(true, flags, 11, 1, 11, 30); + check(false, flags, 11, 31, 11, 1024); + check(true, flags, 12, 1, 12, 31); + check(false, flags, 12, 32, 12, 1024); + check(false, flags, 13, 0, 16, 1024); + check(false, flags, u32::MAX, 0, u32::MAX, 1024); + check(false, flags, 0, u32::MAX, 16, u32::MAX); + check(false, flags, u32::MAX, u32::MAX, u32::MAX, u32::MAX); + } + + for &flags in LEAP_FLAGS.iter() { + check(false, flags, 0, 0, 0, 1024); + check(false, flags, 0, 0, 16, 0); + check(true, flags, 1, 1, 1, 31); + check(false, flags, 1, 32, 1, 1024); + check(true, flags, 2, 1, 2, 29); + check(false, flags, 2, 30, 2, 1024); + check(true, flags, 3, 1, 3, 31); + check(false, flags, 3, 32, 3, 1024); + check(true, flags, 4, 1, 4, 30); + check(false, flags, 4, 31, 4, 1024); + check(true, flags, 5, 1, 5, 31); + check(false, flags, 5, 32, 5, 1024); + check(true, flags, 6, 1, 6, 30); + check(false, flags, 6, 31, 6, 1024); + check(true, flags, 7, 1, 7, 31); + check(false, flags, 7, 32, 7, 1024); + check(true, flags, 8, 1, 8, 31); + check(false, flags, 8, 32, 8, 1024); + check(true, flags, 9, 1, 9, 30); + check(false, flags, 9, 31, 9, 1024); + check(true, flags, 10, 1, 10, 31); + check(false, flags, 10, 32, 10, 1024); + check(true, flags, 11, 1, 11, 30); + check(false, flags, 11, 31, 11, 1024); + check(true, flags, 12, 1, 12, 31); + check(false, flags, 12, 32, 12, 1024); + check(false, flags, 13, 0, 16, 1024); + check(false, flags, u32::MAX, 0, u32::MAX, 1024); + check(false, flags, 0, u32::MAX, 16, u32::MAX); + check(false, flags, u32::MAX, u32::MAX, u32::MAX, u32::MAX); + } + } + + #[test] + fn test_of_fields() { + for &flags in FLAGS.iter() { + for ordinal in range_inclusive(1u32, 366) { + let of = Of::new(ordinal, flags); + if of.valid() { + assert_eq!(of.ordinal(), ordinal); + } + } + } + } + + #[test] + fn test_of_with_fields() { + fn check(flags: YearFlags, ordinal: u32) { + let of = Of::new(ordinal, flags); + + for ordinal in range_inclusive(0u32, 1024) { + let of = of.with_ordinal(ordinal); + assert_eq!(of.valid(), Of::new(ordinal, flags).valid()); + if of.valid() { + assert_eq!(of.ordinal(), ordinal); + } + } + } + + for &flags in NONLEAP_FLAGS.iter() { + check(flags, 1); + check(flags, 365); + } + for &flags in LEAP_FLAGS.iter() { + check(flags, 1); + check(flags, 366); + } + } + + #[test] + fn test_of_weekday() { + assert_eq!(Of::new(1, A).weekday(), Weekday::Sun); + assert_eq!(Of::new(1, B).weekday(), Weekday::Sat); + assert_eq!(Of::new(1, C).weekday(), Weekday::Fri); + assert_eq!(Of::new(1, D).weekday(), Weekday::Thu); + assert_eq!(Of::new(1, E).weekday(), Weekday::Wed); + assert_eq!(Of::new(1, F).weekday(), Weekday::Tue); + assert_eq!(Of::new(1, G).weekday(), Weekday::Mon); + assert_eq!(Of::new(1, AG).weekday(), Weekday::Sun); + assert_eq!(Of::new(1, BA).weekday(), Weekday::Sat); + assert_eq!(Of::new(1, CB).weekday(), Weekday::Fri); + assert_eq!(Of::new(1, DC).weekday(), Weekday::Thu); + assert_eq!(Of::new(1, ED).weekday(), Weekday::Wed); + assert_eq!(Of::new(1, FE).weekday(), Weekday::Tue); + assert_eq!(Of::new(1, GF).weekday(), Weekday::Mon); + + for &flags in FLAGS.iter() { + let mut prev = Of::new(1, flags).weekday(); + for ordinal in range_inclusive(2u32, flags.ndays()) { + let of = Of::new(ordinal, flags); + let expected = prev.succ(); + assert_eq!(of.weekday(), expected); + prev = expected; + } + } + } + + #[test] + fn test_mdf_fields() { + for &flags in FLAGS.iter() { + for month in range_inclusive(1u32, 12) { + for day in range_inclusive(1u32, 31) { + let mdf = Mdf::new(month, day, flags); + if mdf.valid() { + assert_eq!(mdf.month(), month); + assert_eq!(mdf.day(), day); + } + } + } + } + } + + #[test] + fn test_mdf_with_fields() { + fn check(flags: YearFlags, month: u32, day: u32) { + let mdf = Mdf::new(month, day, flags); + + for month in range_inclusive(0u32, 16) { + let mdf = mdf.with_month(month); + assert_eq!(mdf.valid(), Mdf::new(month, day, flags).valid()); + if mdf.valid() { + assert_eq!(mdf.month(), month); + assert_eq!(mdf.day(), day); + } + } + + for day in range_inclusive(0u32, 1024) { + let mdf = mdf.with_day(day); + assert_eq!(mdf.valid(), Mdf::new(month, day, flags).valid()); + if mdf.valid() { + assert_eq!(mdf.month(), month); + assert_eq!(mdf.day(), day); + } + } + } + + for &flags in NONLEAP_FLAGS.iter() { + check(flags, 1, 1); + check(flags, 1, 31); + check(flags, 2, 1); + check(flags, 2, 28); + check(flags, 2, 29); + check(flags, 12, 31); + } + for &flags in LEAP_FLAGS.iter() { + check(flags, 1, 1); + check(flags, 1, 31); + check(flags, 2, 1); + check(flags, 2, 29); + check(flags, 2, 30); + check(flags, 12, 31); + } + } + + #[test] + fn test_of_isoweekdate_raw() { + for &flags in FLAGS.iter() { + // January 4 should be in the first week + let (week, _) = Of::new(4 /* January 4 */, flags).isoweekdate_raw(); + assert_eq!(week, 1); + } + } + + #[test] + fn test_of_to_mdf() { + for i in range_inclusive(0u32, 8192) { + let of = Of(i); + assert_eq!(of.valid(), of.to_mdf().valid()); + } + } + + #[test] + fn test_mdf_to_of() { + for i in range_inclusive(0u32, 8192) { + let mdf = Mdf(i); + assert_eq!(mdf.valid(), mdf.to_of().valid()); + } + } + + #[test] + fn test_of_to_mdf_to_of() { + for i in range_inclusive(0u32, 8192) { + let of = Of(i); + if of.valid() { + assert_eq!(of, of.to_mdf().to_of()); + } + } + } + + #[test] + fn test_mdf_to_of_to_mdf() { + for i in range_inclusive(0u32, 8192) { + let mdf = Mdf(i); + if mdf.valid() { + assert_eq!(mdf, mdf.to_of().to_mdf()); + } + } + } +} diff --git a/third_party/rust/chrono/src/naive/isoweek.rs b/third_party/rust/chrono/src/naive/isoweek.rs new file mode 100644 index 0000000000..ece10f250b --- /dev/null +++ b/third_party/rust/chrono/src/naive/isoweek.rs @@ -0,0 +1,163 @@ +// This is a part of Chrono. +// See README.md and LICENSE.txt for details. + +//! ISO 8601 week. + +use core::fmt; + +use super::internals::{DateImpl, Of, YearFlags}; + +/// ISO 8601 week. +/// +/// This type, combined with [`Weekday`](../enum.Weekday.html), +/// constitues the ISO 8601 [week date](./struct.NaiveDate.html#week-date). +/// One can retrieve this type from the existing [`Datelike`](../trait.Datelike.html) types +/// via the [`Datelike::iso_week`](../trait.Datelike.html#tymethod.iso_week) method. +#[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)] +pub struct IsoWeek { + // note that this allows for larger year range than `NaiveDate`. + // this is crucial because we have an edge case for the first and last week supported, + // which year number might not match the calendar year number. + ywf: DateImpl, // (year << 10) | (week << 4) | flag +} + +/// Returns the corresponding `IsoWeek` from the year and the `Of` internal value. +// +// internal use only. we don't expose the public constructor for `IsoWeek` for now, +// because the year range for the week date and the calendar date do not match and +// it is confusing to have a date that is out of range in one and not in another. +// currently we sidestep this issue by making `IsoWeek` fully dependent of `Datelike`. +pub fn iso_week_from_yof(year: i32, of: Of) -> IsoWeek { + let (rawweek, _) = of.isoweekdate_raw(); + let (year, week) = if rawweek < 1 { + // previous year + let prevlastweek = YearFlags::from_year(year - 1).nisoweeks(); + (year - 1, prevlastweek) + } else { + let lastweek = of.flags().nisoweeks(); + if rawweek > lastweek { + // next year + (year + 1, 1) + } else { + (year, rawweek) + } + }; + IsoWeek { ywf: (year << 10) | (week << 4) as DateImpl | DateImpl::from(of.flags().0) } +} + +impl IsoWeek { + /// Returns the year number for this ISO week. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_isoywd(2015, 1, Weekday::Mon); + /// assert_eq!(d.iso_week().year(), 2015); + /// ~~~~ + /// + /// This year number might not match the calendar year number. + /// Continuing the example... + /// + /// ~~~~ + /// # use chrono::{NaiveDate, Datelike, Weekday}; + /// # let d = NaiveDate::from_isoywd(2015, 1, Weekday::Mon); + /// assert_eq!(d.year(), 2014); + /// assert_eq!(d, NaiveDate::from_ymd(2014, 12, 29)); + /// ~~~~ + #[inline] + pub fn year(&self) -> i32 { + self.ywf >> 10 + } + + /// Returns the ISO week number starting from 1. + /// + /// The return value ranges from 1 to 53. (The last week of year differs by years.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_isoywd(2015, 15, Weekday::Mon); + /// assert_eq!(d.iso_week().week(), 15); + /// ~~~~ + #[inline] + pub fn week(&self) -> u32 { + ((self.ywf >> 4) & 0x3f) as u32 + } + + /// Returns the ISO week number starting from 0. + /// + /// The return value ranges from 0 to 52. (The last week of year differs by years.) + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveDate, Datelike, Weekday}; + /// + /// let d = NaiveDate::from_isoywd(2015, 15, Weekday::Mon); + /// assert_eq!(d.iso_week().week0(), 14); + /// ~~~~ + #[inline] + pub fn week0(&self) -> u32 { + ((self.ywf >> 4) & 0x3f) as u32 - 1 + } +} + +/// The `Debug` output of the ISO week `w` is the same as +/// [`d.format("%G-W%V")`](../format/strftime/index.html) +/// where `d` is any `NaiveDate` value in that week. +/// +/// # Example +/// +/// ~~~~ +/// use chrono::{NaiveDate, Datelike}; +/// +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd(2015, 9, 5).iso_week()), "2015-W36"); +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd( 0, 1, 3).iso_week()), "0000-W01"); +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd(9999, 12, 31).iso_week()), "9999-W52"); +/// ~~~~ +/// +/// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. +/// +/// ~~~~ +/// # use chrono::{NaiveDate, Datelike}; +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd( 0, 1, 2).iso_week()), "-0001-W52"); +/// assert_eq!(format!("{:?}", NaiveDate::from_ymd(10000, 12, 31).iso_week()), "+10000-W52"); +/// ~~~~ +impl fmt::Debug for IsoWeek { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let year = self.year(); + let week = self.week(); + if 0 <= year && year <= 9999 { + write!(f, "{:04}-W{:02}", year, week) + } else { + // ISO 8601 requires the explicit sign for out-of-range years + write!(f, "{:+05}-W{:02}", year, week) + } + } +} + +#[cfg(test)] +mod tests { + use naive::{internals, MAX_DATE, MIN_DATE}; + use Datelike; + + #[test] + fn test_iso_week_extremes() { + let minweek = MIN_DATE.iso_week(); + let maxweek = MAX_DATE.iso_week(); + + assert_eq!(minweek.year(), internals::MIN_YEAR); + assert_eq!(minweek.week(), 1); + assert_eq!(minweek.week0(), 0); + assert_eq!(format!("{:?}", minweek), MIN_DATE.format("%G-W%V").to_string()); + + assert_eq!(maxweek.year(), internals::MAX_YEAR + 1); + assert_eq!(maxweek.week(), 1); + assert_eq!(maxweek.week0(), 0); + assert_eq!(format!("{:?}", maxweek), MAX_DATE.format("%G-W%V").to_string()); + } +} diff --git a/third_party/rust/chrono/src/naive/time.rs b/third_party/rust/chrono/src/naive/time.rs new file mode 100644 index 0000000000..1ddc9fbedc --- /dev/null +++ b/third_party/rust/chrono/src/naive/time.rs @@ -0,0 +1,1814 @@ +// This is a part of Chrono. +// See README.md and LICENSE.txt for details. + +//! ISO 8601 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 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 Timelike; + +pub const MIN_TIME: NaiveTime = NaiveTime { secs: 0, frac: 0 }; +pub const MAX_TIME: NaiveTime = NaiveTime { secs: 23 * 3600 + 59 * 60 + 59, frac: 999_999_999 }; + +/// ISO 8601 time without timezone. +/// Allows for the nanosecond precision and optional leap second representation. +/// +/// # Leap Second Handling +/// +/// Since 1960s, the manmade atomic clock has been so accurate that +/// it is much more accurate than Earth's own motion. +/// It became desirable to define the civil time in terms of the atomic clock, +/// but that risks the desynchronization of the civil time from Earth. +/// To account for this, the designers of the Coordinated Universal Time (UTC) +/// made that the UTC should be kept within 0.9 seconds of the observed Earth-bound time. +/// When the mean solar day is longer than the ideal (86,400 seconds), +/// the error slowly accumulates and it is necessary to add a **leap second** +/// to slow the UTC down a bit. +/// (We may also remove a second to speed the UTC up a bit, but it never happened.) +/// The leap second, if any, follows 23:59:59 of June 30 or December 31 in the UTC. +/// +/// Fast forward to the 21st century, +/// we have seen 26 leap seconds from January 1972 to December 2015. +/// Yes, 26 seconds. Probably you can read this paragraph within 26 seconds. +/// But those 26 seconds, and possibly more in the future, are never predictable, +/// and whether to add a leap second or not is known only before 6 months. +/// Internet-based clocks (via NTP) do account for known leap seconds, +/// but the system API normally doesn't (and often can't, with no network connection) +/// and there is no reliable way to retrieve leap second information. +/// +/// Chrono does not try to accurately implement leap seconds; it is impossible. +/// Rather, **it allows for leap seconds but behaves as if there are *no other* leap seconds.** +/// Various operations will ignore any possible leap second(s) +/// except when any of the operands were actually leap seconds. +/// +/// If you cannot tolerate this behavior, +/// you must use a separate `TimeZone` for the International Atomic Time (TAI). +/// TAI is like UTC but has no leap seconds, and thus slightly differs from UTC. +/// Chrono does not yet provide such implementation, but it is planned. +/// +/// ## Representing Leap Seconds +/// +/// The leap second is indicated via fractional seconds more than 1 second. +/// This makes possible to treat a leap second as the prior non-leap second +/// if you don't care about sub-second accuracy. +/// You should use the proper formatting to get the raw leap second. +/// +/// All methods accepting fractional seconds will accept such values. +/// +/// ~~~~ +/// use chrono::{NaiveDate, NaiveTime, Utc, TimeZone}; +/// +/// let t = NaiveTime::from_hms_milli(8, 59, 59, 1_000); +/// +/// let dt1 = NaiveDate::from_ymd(2015, 7, 1).and_hms_micro(8, 59, 59, 1_000_000); +/// +/// let dt2 = Utc.ymd(2015, 6, 30).and_hms_nano(23, 59, 59, 1_000_000_000); +/// # let _ = (t, dt1, dt2); +/// ~~~~ +/// +/// Note that the leap second can happen anytime given an appropriate time zone; +/// 2015-07-01 01:23:60 would be a proper leap second if UTC+01:24 had existed. +/// Practically speaking, though, 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. +/// +/// ## Date And Time Arithmetics +/// +/// As a concrete example, let's assume that `03:00:60` and `04:00:60` are leap seconds. +/// In reality, of course, leap seconds are separated by at least 6 months. +/// We will also use some intuitive concise notations for the explanation. +/// +/// `Time + Duration` +/// (short for [`NaiveTime::overflowing_add_signed`](#method.overflowing_add_signed)): +/// +/// - `03:00:00 + 1s = 03:00:01`. +/// - `03:00:59 + 60s = 03:02:00`. +/// - `03:00:59 + 1s = 03:01:00`. +/// - `03:00:60 + 1s = 03:01:00`. +/// Note that the sum is identical to the previous. +/// - `03:00:60 + 60s = 03:01:59`. +/// - `03:00:60 + 61s = 03:02:00`. +/// - `03:00:60.1 + 0.8s = 03:00:60.9`. +/// +/// `Time - Duration` +/// (short for [`NaiveTime::overflowing_sub_signed`](#method.overflowing_sub_signed)): +/// +/// - `03:00:00 - 1s = 02:59:59`. +/// - `03:01:00 - 1s = 03:00:59`. +/// - `03:01:00 - 60s = 03:00:00`. +/// - `03:00:60 - 60s = 03:00:00`. +/// Note that the result is identical to the previous. +/// - `03:00:60.7 - 0.4s = 03:00:60.3`. +/// - `03:00:60.7 - 0.9s = 03:00:59.8`. +/// +/// `Time - Time` +/// (short for [`NaiveTime::signed_duration_since`](#method.signed_duration_since)): +/// +/// - `04:00:00 - 03:00:00 = 3600s`. +/// - `03:01:00 - 03:00:00 = 60s`. +/// - `03:00:60 - 03:00:00 = 60s`. +/// Note that the difference is identical to the previous. +/// - `03:00:60.6 - 03:00:59.4 = 1.2s`. +/// - `03:01:00 - 03:00:59.8 = 0.2s`. +/// - `03:01:00 - 03:00:60.5 = 0.5s`. +/// Note that the difference is larger than the previous, +/// even though the leap second clearly follows the previous whole second. +/// - `04:00:60.9 - 03:00:60.1 = +/// (04:00:60.9 - 04:00:00) + (04:00:00 - 03:01:00) + (03:01:00 - 03:00:60.1) = +/// 60.9s + 3540s + 0.9s = 3601.8s`. +/// +/// In general, +/// +/// - `Time + Duration` unconditionally equals to `Duration + Time`. +/// +/// - `Time - Duration` unconditionally equals to `Time + (-Duration)`. +/// +/// - `Time1 - Time2` unconditionally equals to `-(Time2 - Time1)`. +/// +/// - Associativity does not generally hold, because +/// `(Time + Duration1) - Duration2` no longer equals to `Time + (Duration1 - Duration2)` +/// for two positive durations. +/// +/// - As a special case, `(Time + Duration) - Duration` also does not equal to `Time`. +/// +/// - If you can assume that all durations have the same sign, however, +/// then the associativity holds: +/// `(Time + Duration1) + Duration2` equals to `Time + (Duration1 + Duration2)` +/// for two positive durations. +/// +/// ## Reading And Writing Leap Seconds +/// +/// The "typical" leap seconds on the minute boundary are +/// correctly handled both in the formatting and parsing. +/// The leap second in the human-readable representation +/// will be represented as the second part being 60, as required by ISO 8601. +/// +/// ~~~~ +/// use chrono::{Utc, TimeZone}; +/// +/// let dt = Utc.ymd(2015, 6, 30).and_hms_milli(23, 59, 59, 1_000); +/// assert_eq!(format!("{:?}", dt), "2015-06-30T23:59:60Z"); +/// ~~~~ +/// +/// There are hypothetical leap seconds not on the minute boundary +/// nevertheless supported by Chrono. +/// They are allowed for the sake of completeness and consistency; +/// there were several "exotic" time zone offsets with fractional minutes prior to UTC after all. +/// For such cases the human-readable representation is ambiguous +/// and would be read back to the next non-leap second. +/// +/// ~~~~ +/// use chrono::{DateTime, Utc, TimeZone}; +/// +/// let dt = Utc.ymd(2015, 6, 30).and_hms_milli(23, 56, 4, 1_000); +/// assert_eq!(format!("{:?}", dt), "2015-06-30T23:56:05Z"); +/// +/// let dt = Utc.ymd(2015, 6, 30).and_hms(23, 56, 5); +/// assert_eq!(format!("{:?}", dt), "2015-06-30T23:56:05Z"); +/// assert_eq!(DateTime::parse_from_rfc3339("2015-06-30T23:56:05Z").unwrap(), dt); +/// ~~~~ +/// +/// Since Chrono alone cannot determine any existence of leap seconds, +/// **there is absolutely no guarantee that the leap second read has actually happened**. +#[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)] +pub struct NaiveTime { + secs: u32, + frac: u32, +} + +impl NaiveTime { + /// Makes a new `NaiveTime` from hour, minute and second. + /// + /// No [leap second](#leap-second-handling) is allowed here; + /// use `NaiveTime::from_hms_*` methods with a subsecond parameter instead. + /// + /// Panics on invalid hour, minute and/or second. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let t = NaiveTime::from_hms(23, 56, 4); + /// assert_eq!(t.hour(), 23); + /// assert_eq!(t.minute(), 56); + /// assert_eq!(t.second(), 4); + /// assert_eq!(t.nanosecond(), 0); + /// ~~~~ + #[inline] + pub fn from_hms(hour: u32, min: u32, sec: u32) -> NaiveTime { + NaiveTime::from_hms_opt(hour, min, sec).expect("invalid time") + } + + /// Makes a new `NaiveTime` from hour, minute and second. + /// + /// No [leap second](#leap-second-handling) is allowed here; + /// use `NaiveTime::from_hms_*_opt` methods with a subsecond parameter instead. + /// + /// Returns `None` on invalid hour, minute and/or second. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveTime; + /// + /// let from_hms_opt = NaiveTime::from_hms_opt; + /// + /// assert!(from_hms_opt(0, 0, 0).is_some()); + /// assert!(from_hms_opt(23, 59, 59).is_some()); + /// assert!(from_hms_opt(24, 0, 0).is_none()); + /// assert!(from_hms_opt(23, 60, 0).is_none()); + /// assert!(from_hms_opt(23, 59, 60).is_none()); + /// ~~~~ + #[inline] + pub fn from_hms_opt(hour: u32, min: u32, sec: u32) -> Option<NaiveTime> { + NaiveTime::from_hms_nano_opt(hour, min, sec, 0) + } + + /// Makes a new `NaiveTime` from hour, minute, second and millisecond. + /// + /// The millisecond part can exceed 1,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Panics on invalid hour, minute, second and/or millisecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let t = NaiveTime::from_hms_milli(23, 56, 4, 12); + /// assert_eq!(t.hour(), 23); + /// assert_eq!(t.minute(), 56); + /// assert_eq!(t.second(), 4); + /// assert_eq!(t.nanosecond(), 12_000_000); + /// ~~~~ + #[inline] + pub fn from_hms_milli(hour: u32, min: u32, sec: u32, milli: u32) -> NaiveTime { + NaiveTime::from_hms_milli_opt(hour, min, sec, milli).expect("invalid time") + } + + /// Makes a new `NaiveTime` from hour, minute, second and millisecond. + /// + /// The millisecond part can exceed 1,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Returns `None` on invalid hour, minute, second and/or millisecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveTime; + /// + /// let from_hmsm_opt = NaiveTime::from_hms_milli_opt; + /// + /// assert!(from_hmsm_opt(0, 0, 0, 0).is_some()); + /// assert!(from_hmsm_opt(23, 59, 59, 999).is_some()); + /// assert!(from_hmsm_opt(23, 59, 59, 1_999).is_some()); // a leap second after 23:59:59 + /// assert!(from_hmsm_opt(24, 0, 0, 0).is_none()); + /// assert!(from_hmsm_opt(23, 60, 0, 0).is_none()); + /// assert!(from_hmsm_opt(23, 59, 60, 0).is_none()); + /// assert!(from_hmsm_opt(23, 59, 59, 2_000).is_none()); + /// ~~~~ + #[inline] + pub fn from_hms_milli_opt(hour: u32, min: u32, sec: u32, milli: u32) -> Option<NaiveTime> { + milli + .checked_mul(1_000_000) + .and_then(|nano| NaiveTime::from_hms_nano_opt(hour, min, sec, nano)) + } + + /// Makes a new `NaiveTime` from hour, minute, second and microsecond. + /// + /// The microsecond part can exceed 1,000,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Panics on invalid hour, minute, second and/or microsecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let t = NaiveTime::from_hms_micro(23, 56, 4, 12_345); + /// assert_eq!(t.hour(), 23); + /// assert_eq!(t.minute(), 56); + /// assert_eq!(t.second(), 4); + /// assert_eq!(t.nanosecond(), 12_345_000); + /// ~~~~ + #[inline] + pub fn from_hms_micro(hour: u32, min: u32, sec: u32, micro: u32) -> NaiveTime { + NaiveTime::from_hms_micro_opt(hour, min, sec, micro).expect("invalid time") + } + + /// Makes a new `NaiveTime` from hour, minute, second and microsecond. + /// + /// The microsecond part can exceed 1,000,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Returns `None` on invalid hour, minute, second and/or microsecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveTime; + /// + /// let from_hmsu_opt = NaiveTime::from_hms_micro_opt; + /// + /// assert!(from_hmsu_opt(0, 0, 0, 0).is_some()); + /// assert!(from_hmsu_opt(23, 59, 59, 999_999).is_some()); + /// assert!(from_hmsu_opt(23, 59, 59, 1_999_999).is_some()); // a leap second after 23:59:59 + /// assert!(from_hmsu_opt(24, 0, 0, 0).is_none()); + /// assert!(from_hmsu_opt(23, 60, 0, 0).is_none()); + /// assert!(from_hmsu_opt(23, 59, 60, 0).is_none()); + /// assert!(from_hmsu_opt(23, 59, 59, 2_000_000).is_none()); + /// ~~~~ + #[inline] + pub fn from_hms_micro_opt(hour: u32, min: u32, sec: u32, micro: u32) -> Option<NaiveTime> { + micro.checked_mul(1_000).and_then(|nano| NaiveTime::from_hms_nano_opt(hour, min, sec, nano)) + } + + /// Makes a new `NaiveTime` from hour, minute, second and nanosecond. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Panics on invalid hour, minute, second and/or nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let t = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(t.hour(), 23); + /// assert_eq!(t.minute(), 56); + /// assert_eq!(t.second(), 4); + /// assert_eq!(t.nanosecond(), 12_345_678); + /// ~~~~ + #[inline] + pub fn from_hms_nano(hour: u32, min: u32, sec: u32, nano: u32) -> NaiveTime { + NaiveTime::from_hms_nano_opt(hour, min, sec, nano).expect("invalid time") + } + + /// Makes a new `NaiveTime` from hour, minute, second and nanosecond. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Returns `None` on invalid hour, minute, second and/or nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveTime; + /// + /// let from_hmsn_opt = NaiveTime::from_hms_nano_opt; + /// + /// assert!(from_hmsn_opt(0, 0, 0, 0).is_some()); + /// assert!(from_hmsn_opt(23, 59, 59, 999_999_999).is_some()); + /// assert!(from_hmsn_opt(23, 59, 59, 1_999_999_999).is_some()); // a leap second after 23:59:59 + /// assert!(from_hmsn_opt(24, 0, 0, 0).is_none()); + /// assert!(from_hmsn_opt(23, 60, 0, 0).is_none()); + /// assert!(from_hmsn_opt(23, 59, 60, 0).is_none()); + /// assert!(from_hmsn_opt(23, 59, 59, 2_000_000_000).is_none()); + /// ~~~~ + #[inline] + pub fn from_hms_nano_opt(hour: u32, min: u32, sec: u32, nano: u32) -> Option<NaiveTime> { + if hour >= 24 || min >= 60 || sec >= 60 || nano >= 2_000_000_000 { + return None; + } + let secs = hour * 3600 + min * 60 + sec; + Some(NaiveTime { secs: secs, frac: nano }) + } + + /// Makes a new `NaiveTime` from the number of seconds since midnight and nanosecond. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Panics on invalid number of seconds and/or nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let t = NaiveTime::from_num_seconds_from_midnight(86164, 12_345_678); + /// assert_eq!(t.hour(), 23); + /// assert_eq!(t.minute(), 56); + /// assert_eq!(t.second(), 4); + /// assert_eq!(t.nanosecond(), 12_345_678); + /// ~~~~ + #[inline] + pub fn from_num_seconds_from_midnight(secs: u32, nano: u32) -> NaiveTime { + NaiveTime::from_num_seconds_from_midnight_opt(secs, nano).expect("invalid time") + } + + /// Makes a new `NaiveTime` from the number of seconds since midnight and nanosecond. + /// + /// The nanosecond part can exceed 1,000,000,000 + /// in order to represent the [leap second](#leap-second-handling). + /// + /// Returns `None` on invalid number of seconds and/or nanosecond. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveTime; + /// + /// let from_nsecs_opt = NaiveTime::from_num_seconds_from_midnight_opt; + /// + /// assert!(from_nsecs_opt(0, 0).is_some()); + /// assert!(from_nsecs_opt(86399, 999_999_999).is_some()); + /// assert!(from_nsecs_opt(86399, 1_999_999_999).is_some()); // a leap second after 23:59:59 + /// assert!(from_nsecs_opt(86_400, 0).is_none()); + /// assert!(from_nsecs_opt(86399, 2_000_000_000).is_none()); + /// ~~~~ + #[inline] + pub fn from_num_seconds_from_midnight_opt(secs: u32, nano: u32) -> Option<NaiveTime> { + if secs >= 86_400 || nano >= 2_000_000_000 { + return None; + } + Some(NaiveTime { secs: secs, frac: nano }) + } + + /// Parses a string with the specified format string and returns a new `NaiveTime`. + /// See the [`format::strftime` module](../format/strftime/index.html) + /// on the supported escape sequences. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::NaiveTime; + /// + /// let parse_from_str = NaiveTime::parse_from_str; + /// + /// assert_eq!(parse_from_str("23:56:04", "%H:%M:%S"), + /// Ok(NaiveTime::from_hms(23, 56, 4))); + /// assert_eq!(parse_from_str("pm012345.6789", "%p%I%M%S%.f"), + /// Ok(NaiveTime::from_hms_micro(13, 23, 45, 678_900))); + /// ~~~~ + /// + /// Date and offset is ignored for the purpose of parsing. + /// + /// ~~~~ + /// # use chrono::NaiveTime; + /// # let parse_from_str = NaiveTime::parse_from_str; + /// assert_eq!(parse_from_str("2014-5-17T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), + /// Ok(NaiveTime::from_hms(12, 34, 56))); + /// ~~~~ + /// + /// [Leap seconds](#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::NaiveTime; + /// # let parse_from_str = NaiveTime::parse_from_str; + /// assert_eq!(parse_from_str("08:59:60.123", "%H:%M:%S%.f"), + /// Ok(NaiveTime::from_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::NaiveTime; + /// # let parse_from_str = NaiveTime::parse_from_str; + /// assert_eq!(parse_from_str("7:15", "%H:%M"), + /// Ok(NaiveTime::from_hms(7, 15, 0))); + /// + /// assert!(parse_from_str("04m33s", "%Mm%Ss").is_err()); + /// assert!(parse_from_str("12", "%H").is_err()); + /// assert!(parse_from_str("17:60", "%H:%M").is_err()); + /// assert!(parse_from_str("24:00:00", "%H:%M:%S").is_err()); + /// ~~~~ + /// + /// All parsed fields should be consistent to each other, otherwise it's an error. + /// Here `%H` is for 24-hour clocks, unlike `%I`, + /// and thus can be independently determined without AM/PM. + /// + /// ~~~~ + /// # use chrono::NaiveTime; + /// # let parse_from_str = NaiveTime::parse_from_str; + /// assert!(parse_from_str("13:07 AM", "%H:%M %p").is_err()); + /// ~~~~ + pub fn parse_from_str(s: &str, fmt: &str) -> ParseResult<NaiveTime> { + let mut parsed = Parsed::new(); + parse(&mut parsed, s, StrftimeItems::new(fmt))?; + parsed.to_naive_time() + } + + /// Adds given `Duration` to the current time, + /// and also returns the number of *seconds* + /// in the integral number of days ignored from the addition. + /// (We cannot return `Duration` because it is subject to overflow or underflow.) + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveTime}; + /// + /// let from_hms = NaiveTime::from_hms; + /// + /// assert_eq!(from_hms(3, 4, 5).overflowing_add_signed(Duration::hours(11)), + /// (from_hms(14, 4, 5), 0)); + /// assert_eq!(from_hms(3, 4, 5).overflowing_add_signed(Duration::hours(23)), + /// (from_hms(2, 4, 5), 86_400)); + /// assert_eq!(from_hms(3, 4, 5).overflowing_add_signed(Duration::hours(-7)), + /// (from_hms(20, 4, 5), -86_400)); + /// # } + /// ~~~~ + #[cfg_attr(feature = "cargo-clippy", allow(cyclomatic_complexity))] + pub fn overflowing_add_signed(&self, mut rhs: OldDuration) -> (NaiveTime, i64) { + let mut secs = self.secs; + let mut frac = self.frac; + + // check if `self` is a leap second and adding `rhs` would escape that leap second. + // if it's the case, update `self` and `rhs` to involve no leap second; + // otherwise the addition immediately finishes. + if frac >= 1_000_000_000 { + let rfrac = 2_000_000_000 - frac; + if rhs >= OldDuration::nanoseconds(i64::from(rfrac)) { + rhs = rhs - OldDuration::nanoseconds(i64::from(rfrac)); + secs += 1; + frac = 0; + } else if rhs < OldDuration::nanoseconds(-i64::from(frac)) { + rhs = rhs + OldDuration::nanoseconds(i64::from(frac)); + frac = 0; + } else { + frac = (i64::from(frac) + rhs.num_nanoseconds().unwrap()) as u32; + debug_assert!(frac < 2_000_000_000); + return (NaiveTime { secs: secs, frac: frac }, 0); + } + } + debug_assert!(secs <= 86_400); + debug_assert!(frac < 1_000_000_000); + + let rhssecs = rhs.num_seconds(); + let rhsfrac = (rhs - OldDuration::seconds(rhssecs)).num_nanoseconds().unwrap(); + debug_assert_eq!(OldDuration::seconds(rhssecs) + OldDuration::nanoseconds(rhsfrac), rhs); + let rhssecsinday = rhssecs % 86_400; + let mut morerhssecs = rhssecs - rhssecsinday; + let rhssecs = rhssecsinday as i32; + let rhsfrac = rhsfrac as i32; + debug_assert!(-86_400 < rhssecs && rhssecs < 86_400); + debug_assert_eq!(morerhssecs % 86_400, 0); + debug_assert!(-1_000_000_000 < rhsfrac && rhsfrac < 1_000_000_000); + + let mut secs = secs as i32 + rhssecs; + let mut frac = frac as i32 + rhsfrac; + debug_assert!(-86_400 < secs && secs < 2 * 86_400); + debug_assert!(-1_000_000_000 < frac && frac < 2_000_000_000); + + if frac < 0 { + frac += 1_000_000_000; + secs -= 1; + } else if frac >= 1_000_000_000 { + frac -= 1_000_000_000; + secs += 1; + } + debug_assert!(-86_400 <= secs && secs < 2 * 86_400); + debug_assert!(0 <= frac && frac < 1_000_000_000); + + if secs < 0 { + secs += 86_400; + morerhssecs -= 86_400; + } else if secs >= 86_400 { + secs -= 86_400; + morerhssecs += 86_400; + } + debug_assert!(0 <= secs && secs < 86_400); + + (NaiveTime { secs: secs as u32, frac: frac as u32 }, morerhssecs) + } + + /// Subtracts given `Duration` from the current time, + /// and also returns the number of *seconds* + /// in the integral number of days ignored from the subtraction. + /// (We cannot return `Duration` because it is subject to overflow or underflow.) + /// + /// # Example + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// use chrono::{Duration, NaiveTime}; + /// + /// let from_hms = NaiveTime::from_hms; + /// + /// assert_eq!(from_hms(3, 4, 5).overflowing_sub_signed(Duration::hours(2)), + /// (from_hms(1, 4, 5), 0)); + /// assert_eq!(from_hms(3, 4, 5).overflowing_sub_signed(Duration::hours(17)), + /// (from_hms(10, 4, 5), 86_400)); + /// assert_eq!(from_hms(3, 4, 5).overflowing_sub_signed(Duration::hours(-22)), + /// (from_hms(1, 4, 5), -86_400)); + /// # } + /// ~~~~ + #[inline] + pub fn overflowing_sub_signed(&self, rhs: OldDuration) -> (NaiveTime, i64) { + let (time, rhs) = self.overflowing_add_signed(-rhs); + (time, -rhs) // safe to negate, rhs is within +/- (2^63 / 1000) + } + + /// Subtracts another `NaiveTime` from the current time. + /// Returns a `Duration` within +/- 1 day. + /// This does not overflow or underflow at all. + /// + /// As a part of Chrono's [leap second handling](#leap-second-handling), + /// the subtraction assumes that **there is no leap second ever**, + /// except when any of the `NaiveTime`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, NaiveTime}; + /// + /// let from_hmsm = NaiveTime::from_hms_milli; + /// let since = NaiveTime::signed_duration_since; + /// + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 7, 900)), + /// Duration::zero()); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 7, 875)), + /// Duration::milliseconds(25)); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 6, 925)), + /// Duration::milliseconds(975)); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 0, 900)), + /// Duration::seconds(7)); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 0, 7, 900)), + /// Duration::seconds(5 * 60)); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(0, 5, 7, 900)), + /// Duration::seconds(3 * 3600)); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(4, 5, 7, 900)), + /// Duration::seconds(-3600)); + /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(2, 4, 6, 800)), + /// Duration::seconds(3600 + 60 + 1) + Duration::milliseconds(100)); + /// # } + /// ~~~~ + /// + /// Leap seconds are handled, but the subtraction assumes that + /// there were no other leap seconds happened. + /// + /// ~~~~ + /// # extern crate chrono; fn main() { + /// # use chrono::{Duration, NaiveTime}; + /// # let from_hmsm = NaiveTime::from_hms_milli; + /// # let since = NaiveTime::signed_duration_since; + /// assert_eq!(since(from_hmsm(3, 0, 59, 1_000), from_hmsm(3, 0, 59, 0)), + /// Duration::seconds(1)); + /// assert_eq!(since(from_hmsm(3, 0, 59, 1_500), from_hmsm(3, 0, 59, 0)), + /// Duration::milliseconds(1500)); + /// assert_eq!(since(from_hmsm(3, 0, 59, 1_000), from_hmsm(3, 0, 0, 0)), + /// Duration::seconds(60)); + /// assert_eq!(since(from_hmsm(3, 0, 0, 0), from_hmsm(2, 59, 59, 1_000)), + /// Duration::seconds(1)); + /// assert_eq!(since(from_hmsm(3, 0, 59, 1_000), from_hmsm(2, 59, 59, 1_000)), + /// Duration::seconds(61)); + /// # } + /// ~~~~ + pub fn signed_duration_since(self, rhs: NaiveTime) -> OldDuration { + // | | :leap| | | | | | | :leap| | + // | | : | | | | | | | : | | + // ----+----+-----*---+----+----+----+----+----+----+-------*-+----+---- + // | `rhs` | | `self` + // |======================================>| | + // | | `self.secs - rhs.secs` |`self.frac` + // |====>| | |======>| + // `rhs.frac`|========================================>| + // | | | `self - rhs` | | + + use core::cmp::Ordering; + + let secs = i64::from(self.secs) - i64::from(rhs.secs); + let frac = i64::from(self.frac) - i64::from(rhs.frac); + + // `secs` may contain a leap second yet to be counted + let adjust = match self.secs.cmp(&rhs.secs) { + Ordering::Greater => { + if rhs.frac >= 1_000_000_000 { + 1 + } else { + 0 + } + } + Ordering::Equal => 0, + Ordering::Less => { + if self.frac >= 1_000_000_000 { + -1 + } else { + 0 + } + } + }; + + OldDuration::seconds(secs + adjust) + OldDuration::nanoseconds(frac) + } + + /// Formats the 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::NaiveTime; + /// use chrono::format::strftime::StrftimeItems; + /// + /// let fmt = StrftimeItems::new("%H:%M:%S"); + /// let t = NaiveTime::from_hms(23, 56, 4); + /// assert_eq!(t.format_with_items(fmt.clone()).to_string(), "23:56:04"); + /// assert_eq!(t.format("%H:%M:%S").to_string(), "23:56:04"); + /// ~~~~ + /// + /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. + /// + /// ~~~~ + /// # use chrono::NaiveTime; + /// # use chrono::format::strftime::StrftimeItems; + /// # let fmt = StrftimeItems::new("%H:%M:%S").clone(); + /// # let t = NaiveTime::from_hms(23, 56, 4); + /// assert_eq!(format!("{}", t.format_with_items(fmt)), "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(None, Some(*self), items) + } + + /// Formats the 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::NaiveTime; + /// + /// let t = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(t.format("%H:%M:%S").to_string(), "23:56:04"); + /// assert_eq!(t.format("%H:%M:%S%.6f").to_string(), "23:56:04.012345"); + /// assert_eq!(t.format("%-I:%M %p").to_string(), "11:56 PM"); + /// ~~~~ + /// + /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. + /// + /// ~~~~ + /// # use chrono::NaiveTime; + /// # let t = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(format!("{}", t.format("%H:%M:%S")), "23:56:04"); + /// assert_eq!(format!("{}", t.format("%H:%M:%S%.6f")), "23:56:04.012345"); + /// assert_eq!(format!("{}", t.format("%-I:%M %p")), "11:56 PM"); + /// ~~~~ + #[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)) + } + + /// Returns a triple of the hour, minute and second numbers. + fn hms(&self) -> (u32, u32, u32) { + let (mins, sec) = div_mod_floor(self.secs, 60); + let (hour, min) = div_mod_floor(mins, 60); + (hour, min, sec) + } +} + +impl Timelike for NaiveTime { + /// Returns the hour number from 0 to 23. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// assert_eq!(NaiveTime::from_hms(0, 0, 0).hour(), 0); + /// assert_eq!(NaiveTime::from_hms_nano(23, 56, 4, 12_345_678).hour(), 23); + /// ~~~~ + #[inline] + fn hour(&self) -> u32 { + self.hms().0 + } + + /// Returns the minute number from 0 to 59. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// assert_eq!(NaiveTime::from_hms(0, 0, 0).minute(), 0); + /// assert_eq!(NaiveTime::from_hms_nano(23, 56, 4, 12_345_678).minute(), 56); + /// ~~~~ + #[inline] + fn minute(&self) -> u32 { + self.hms().1 + } + + /// Returns the second number from 0 to 59. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// assert_eq!(NaiveTime::from_hms(0, 0, 0).second(), 0); + /// assert_eq!(NaiveTime::from_hms_nano(23, 56, 4, 12_345_678).second(), 4); + /// ~~~~ + /// + /// This method never returns 60 even when it is a leap second. + /// ([Why?](#leap-second-handling)) + /// Use the proper [formatting method](#method.format) to get a human-readable representation. + /// + /// ~~~~ + /// # use chrono::{NaiveTime, Timelike}; + /// let leap = NaiveTime::from_hms_milli(23, 59, 59, 1_000); + /// assert_eq!(leap.second(), 59); + /// assert_eq!(leap.format("%H:%M:%S").to_string(), "23:59:60"); + /// ~~~~ + #[inline] + fn second(&self) -> u32 { + self.hms().2 + } + + /// 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](#leap-second-handling). + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// assert_eq!(NaiveTime::from_hms(0, 0, 0).nanosecond(), 0); + /// assert_eq!(NaiveTime::from_hms_nano(23, 56, 4, 12_345_678).nanosecond(), 12_345_678); + /// ~~~~ + /// + /// Leap seconds may have seemingly out-of-range return values. + /// You can reduce the range with `time.nanosecond() % 1_000_000_000`, or + /// use the proper [formatting method](#method.format) to get a human-readable representation. + /// + /// ~~~~ + /// # use chrono::{NaiveTime, Timelike}; + /// let leap = NaiveTime::from_hms_milli(23, 59, 59, 1_000); + /// assert_eq!(leap.nanosecond(), 1_000_000_000); + /// assert_eq!(leap.format("%H:%M:%S%.9f").to_string(), "23:59:60.000000000"); + /// ~~~~ + #[inline] + fn nanosecond(&self) -> u32 { + self.frac + } + + /// Makes a new `NaiveTime` with the hour number changed. + /// + /// Returns `None` when the resulting `NaiveTime` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let dt = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(dt.with_hour(7), Some(NaiveTime::from_hms_nano(7, 56, 4, 12_345_678))); + /// assert_eq!(dt.with_hour(24), None); + /// ~~~~ + #[inline] + fn with_hour(&self, hour: u32) -> Option<NaiveTime> { + if hour >= 24 { + return None; + } + let secs = hour * 3600 + self.secs % 3600; + Some(NaiveTime { secs: secs, ..*self }) + } + + /// Makes a new `NaiveTime` with the minute number changed. + /// + /// Returns `None` when the resulting `NaiveTime` would be invalid. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let dt = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(dt.with_minute(45), Some(NaiveTime::from_hms_nano(23, 45, 4, 12_345_678))); + /// assert_eq!(dt.with_minute(60), None); + /// ~~~~ + #[inline] + fn with_minute(&self, min: u32) -> Option<NaiveTime> { + if min >= 60 { + return None; + } + let secs = self.secs / 3600 * 3600 + min * 60 + self.secs % 60; + Some(NaiveTime { secs: secs, ..*self }) + } + + /// Makes a new `NaiveTime` with the second number changed. + /// + /// Returns `None` when the resulting `NaiveTime` would be invalid. + /// As with the [`second`](#method.second) method, + /// the input range is restricted to 0 through 59. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let dt = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(dt.with_second(17), Some(NaiveTime::from_hms_nano(23, 56, 17, 12_345_678))); + /// assert_eq!(dt.with_second(60), None); + /// ~~~~ + #[inline] + fn with_second(&self, sec: u32) -> Option<NaiveTime> { + if sec >= 60 { + return None; + } + let secs = self.secs / 60 * 60 + sec; + Some(NaiveTime { secs: secs, ..*self }) + } + + /// Makes a new `NaiveTime` with nanoseconds since the whole non-leap second changed. + /// + /// Returns `None` when the resulting `NaiveTime` would be invalid. + /// As with the [`nanosecond`](#method.nanosecond) method, + /// the input range can exceed 1,000,000,000 for leap seconds. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// let dt = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(dt.with_nanosecond(333_333_333), + /// Some(NaiveTime::from_hms_nano(23, 56, 4, 333_333_333))); + /// assert_eq!(dt.with_nanosecond(2_000_000_000), None); + /// ~~~~ + /// + /// Leap seconds can theoretically follow *any* whole second. + /// The following would be a proper leap second at the time zone offset of UTC-00:03:57 + /// (there are several historical examples comparable to this "non-sense" offset), + /// and therefore is allowed. + /// + /// ~~~~ + /// # use chrono::{NaiveTime, Timelike}; + /// # let dt = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); + /// assert_eq!(dt.with_nanosecond(1_333_333_333), + /// Some(NaiveTime::from_hms_nano(23, 56, 4, 1_333_333_333))); + /// ~~~~ + #[inline] + fn with_nanosecond(&self, nano: u32) -> Option<NaiveTime> { + if nano >= 2_000_000_000 { + return None; + } + Some(NaiveTime { frac: nano, ..*self }) + } + + /// Returns the number of non-leap seconds past the last midnight. + /// + /// # Example + /// + /// ~~~~ + /// use chrono::{NaiveTime, Timelike}; + /// + /// assert_eq!(NaiveTime::from_hms(1, 2, 3).num_seconds_from_midnight(), + /// 3723); + /// assert_eq!(NaiveTime::from_hms_nano(23, 56, 4, 12_345_678).num_seconds_from_midnight(), + /// 86164); + /// assert_eq!(NaiveTime::from_hms_milli(23, 59, 59, 1_000).num_seconds_from_midnight(), + /// 86399); + /// ~~~~ + #[inline] + fn num_seconds_from_midnight(&self) -> u32 { + self.secs // do not repeat the calculation! + } +} + +/// `NaiveTime` 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 NaiveTime { + fn hash<H: hash::Hasher>(&self, state: &mut H) { + self.secs.hash(state); + self.frac.hash(state); + } +} + +/// An addition of `Duration` to `NaiveTime` wraps around and never overflows or underflows. +/// In particular the addition ignores integral number of days. +/// +/// As a part of Chrono's [leap second handling](#leap-second-handling), +/// the addition assumes that **there is no leap second ever**, +/// except when the `NaiveTime` itself represents a leap second +/// in which case the assumption becomes that **there is exactly a single leap second ever**. +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveTime}; +/// +/// let from_hmsm = NaiveTime::from_hms_milli; +/// +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::zero(), from_hmsm(3, 5, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(1), from_hmsm(3, 5, 8, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(-1), from_hmsm(3, 5, 6, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(60 + 4), from_hmsm(3, 6, 11, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(7*60*60 - 6*60), from_hmsm(9, 59, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::milliseconds(80), from_hmsm(3, 5, 7, 80)); +/// assert_eq!(from_hmsm(3, 5, 7, 950) + Duration::milliseconds(280), from_hmsm(3, 5, 8, 230)); +/// assert_eq!(from_hmsm(3, 5, 7, 950) + Duration::milliseconds(-980), from_hmsm(3, 5, 6, 970)); +/// # } +/// ~~~~ +/// +/// The addition wraps around. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveTime}; +/// # let from_hmsm = NaiveTime::from_hms_milli; +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(22*60*60), from_hmsm(1, 5, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(-8*60*60), from_hmsm(19, 5, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::days(800), from_hmsm(3, 5, 7, 0)); +/// # } +/// ~~~~ +/// +/// Leap seconds are handled, but the addition assumes that it is the only leap second happened. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveTime}; +/// # let from_hmsm = NaiveTime::from_hms_milli; +/// let leap = from_hmsm(3, 5, 59, 1_300); +/// assert_eq!(leap + Duration::zero(), from_hmsm(3, 5, 59, 1_300)); +/// assert_eq!(leap + Duration::milliseconds(-500), from_hmsm(3, 5, 59, 800)); +/// assert_eq!(leap + Duration::milliseconds(500), from_hmsm(3, 5, 59, 1_800)); +/// assert_eq!(leap + Duration::milliseconds(800), from_hmsm(3, 6, 0, 100)); +/// assert_eq!(leap + Duration::seconds(10), from_hmsm(3, 6, 9, 300)); +/// assert_eq!(leap + Duration::seconds(-10), from_hmsm(3, 5, 50, 300)); +/// assert_eq!(leap + Duration::days(1), from_hmsm(3, 5, 59, 300)); +/// # } +/// ~~~~ +impl Add<OldDuration> for NaiveTime { + type Output = NaiveTime; + + #[inline] + fn add(self, rhs: OldDuration) -> NaiveTime { + self.overflowing_add_signed(rhs).0 + } +} + +impl AddAssign<OldDuration> for NaiveTime { + #[inline] + fn add_assign(&mut self, rhs: OldDuration) { + *self = self.add(rhs); + } +} + +/// A subtraction of `Duration` from `NaiveTime` wraps around and never overflows or underflows. +/// In particular the addition ignores integral number of days. +/// It is the same as the addition with a negated `Duration`. +/// +/// As a part of Chrono's [leap second handling](#leap-second-handling), +/// the addition assumes that **there is no leap second ever**, +/// except when the `NaiveTime` itself represents a leap second +/// in which case the assumption becomes that **there is exactly a single leap second ever**. +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveTime}; +/// +/// let from_hmsm = NaiveTime::from_hms_milli; +/// +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::zero(), from_hmsm(3, 5, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(1), from_hmsm(3, 5, 6, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(60 + 5), from_hmsm(3, 4, 2, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(2*60*60 + 6*60), from_hmsm(0, 59, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::milliseconds(80), from_hmsm(3, 5, 6, 920)); +/// assert_eq!(from_hmsm(3, 5, 7, 950) - Duration::milliseconds(280), from_hmsm(3, 5, 7, 670)); +/// # } +/// ~~~~ +/// +/// The subtraction wraps around. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveTime}; +/// # let from_hmsm = NaiveTime::from_hms_milli; +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(8*60*60), from_hmsm(19, 5, 7, 0)); +/// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::days(800), from_hmsm(3, 5, 7, 0)); +/// # } +/// ~~~~ +/// +/// Leap seconds are handled, but the subtraction assumes that it is the only leap second happened. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveTime}; +/// # let from_hmsm = NaiveTime::from_hms_milli; +/// let leap = from_hmsm(3, 5, 59, 1_300); +/// assert_eq!(leap - Duration::zero(), from_hmsm(3, 5, 59, 1_300)); +/// assert_eq!(leap - Duration::milliseconds(200), from_hmsm(3, 5, 59, 1_100)); +/// assert_eq!(leap - Duration::milliseconds(500), from_hmsm(3, 5, 59, 800)); +/// assert_eq!(leap - Duration::seconds(60), from_hmsm(3, 5, 0, 300)); +/// assert_eq!(leap - Duration::days(1), from_hmsm(3, 6, 0, 300)); +/// # } +/// ~~~~ +impl Sub<OldDuration> for NaiveTime { + type Output = NaiveTime; + + #[inline] + fn sub(self, rhs: OldDuration) -> NaiveTime { + self.overflowing_sub_signed(rhs).0 + } +} + +impl SubAssign<OldDuration> for NaiveTime { + #[inline] + fn sub_assign(&mut self, rhs: OldDuration) { + *self = self.sub(rhs); + } +} + +/// Subtracts another `NaiveTime` from the current time. +/// Returns a `Duration` within +/- 1 day. +/// This does not overflow or underflow at all. +/// +/// As a part of Chrono's [leap second handling](#leap-second-handling), +/// the subtraction assumes that **there is no leap second ever**, +/// except when any of the `NaiveTime`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 +/// [`NaiveTime::signed_duration_since`](#method.signed_duration_since). +/// +/// # Example +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// use chrono::{Duration, NaiveTime}; +/// +/// let from_hmsm = NaiveTime::from_hms_milli; +/// +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 7, 900), Duration::zero()); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 7, 875), Duration::milliseconds(25)); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 6, 925), Duration::milliseconds(975)); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 0, 900), Duration::seconds(7)); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 0, 7, 900), Duration::seconds(5 * 60)); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(0, 5, 7, 900), Duration::seconds(3 * 3600)); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(4, 5, 7, 900), Duration::seconds(-3600)); +/// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(2, 4, 6, 800), +/// Duration::seconds(3600 + 60 + 1) + Duration::milliseconds(100)); +/// # } +/// ~~~~ +/// +/// Leap seconds are handled, but the subtraction assumes that +/// there were no other leap seconds happened. +/// +/// ~~~~ +/// # extern crate chrono; fn main() { +/// # use chrono::{Duration, NaiveTime}; +/// # let from_hmsm = NaiveTime::from_hms_milli; +/// assert_eq!(from_hmsm(3, 0, 59, 1_000) - from_hmsm(3, 0, 59, 0), Duration::seconds(1)); +/// assert_eq!(from_hmsm(3, 0, 59, 1_500) - from_hmsm(3, 0, 59, 0), +/// Duration::milliseconds(1500)); +/// assert_eq!(from_hmsm(3, 0, 59, 1_000) - from_hmsm(3, 0, 0, 0), Duration::seconds(60)); +/// assert_eq!(from_hmsm(3, 0, 0, 0) - from_hmsm(2, 59, 59, 1_000), Duration::seconds(1)); +/// assert_eq!(from_hmsm(3, 0, 59, 1_000) - from_hmsm(2, 59, 59, 1_000), +/// Duration::seconds(61)); +/// # } +/// ~~~~ +impl Sub<NaiveTime> for NaiveTime { + type Output = OldDuration; + + #[inline] + fn sub(self, rhs: NaiveTime) -> OldDuration { + self.signed_duration_since(rhs) + } +} + +/// The `Debug` output of the naive time `t` is the same as +/// [`t.format("%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::NaiveTime; +/// +/// assert_eq!(format!("{:?}", NaiveTime::from_hms(23, 56, 4)), "23:56:04"); +/// assert_eq!(format!("{:?}", NaiveTime::from_hms_milli(23, 56, 4, 12)), "23:56:04.012"); +/// assert_eq!(format!("{:?}", NaiveTime::from_hms_micro(23, 56, 4, 1234)), "23:56:04.001234"); +/// assert_eq!(format!("{:?}", NaiveTime::from_hms_nano(23, 56, 4, 123456)), "23:56:04.000123456"); +/// ~~~~ +/// +/// Leap seconds may also be used. +/// +/// ~~~~ +/// # use chrono::NaiveTime; +/// assert_eq!(format!("{:?}", NaiveTime::from_hms_milli(6, 59, 59, 1_500)), "06:59:60.500"); +/// ~~~~ +impl fmt::Debug for NaiveTime { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let (hour, min, sec) = self.hms(); + let (sec, nano) = if self.frac >= 1_000_000_000 { + (sec + 1, self.frac - 1_000_000_000) + } else { + (sec, self.frac) + }; + + write!(f, "{:02}:{:02}:{:02}", hour, min, sec)?; + if nano == 0 { + Ok(()) + } else if nano % 1_000_000 == 0 { + write!(f, ".{:03}", nano / 1_000_000) + } else if nano % 1_000 == 0 { + write!(f, ".{:06}", nano / 1_000) + } else { + write!(f, ".{:09}", nano) + } + } +} + +/// The `Display` output of the naive time `t` is the same as +/// [`t.format("%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::NaiveTime; +/// +/// assert_eq!(format!("{}", NaiveTime::from_hms(23, 56, 4)), "23:56:04"); +/// assert_eq!(format!("{}", NaiveTime::from_hms_milli(23, 56, 4, 12)), "23:56:04.012"); +/// assert_eq!(format!("{}", NaiveTime::from_hms_micro(23, 56, 4, 1234)), "23:56:04.001234"); +/// assert_eq!(format!("{}", NaiveTime::from_hms_nano(23, 56, 4, 123456)), "23:56:04.000123456"); +/// ~~~~ +/// +/// Leap seconds may also be used. +/// +/// ~~~~ +/// # use chrono::NaiveTime; +/// assert_eq!(format!("{}", NaiveTime::from_hms_milli(6, 59, 59, 1_500)), "06:59:60.500"); +/// ~~~~ +impl fmt::Display for NaiveTime { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + fmt::Debug::fmt(self, f) + } +} + +/// Parsing a `str` into a `NaiveTime` uses the same format, +/// [`%H:%M:%S%.f`](../format/strftime/index.html), as in `Debug` and `Display`. +/// +/// # Example +/// +/// ~~~~ +/// use chrono::NaiveTime; +/// +/// let t = NaiveTime::from_hms(23, 56, 4); +/// assert_eq!("23:56:04".parse::<NaiveTime>(), Ok(t)); +/// +/// let t = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678); +/// assert_eq!("23:56:4.012345678".parse::<NaiveTime>(), Ok(t)); +/// +/// let t = NaiveTime::from_hms_nano(23, 59, 59, 1_234_567_890); // leap second +/// assert_eq!("23:59:60.23456789".parse::<NaiveTime>(), Ok(t)); +/// +/// assert!("foo".parse::<NaiveTime>().is_err()); +/// ~~~~ +impl str::FromStr for NaiveTime { + type Err = ParseError; + + fn from_str(s: &str) -> ParseResult<NaiveTime> { + const ITEMS: &'static [Item<'static>] = &[ + 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_time() + } +} + +#[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] +fn test_encodable_json<F, E>(to_string: F) +where + F: Fn(&NaiveTime) -> Result<String, E>, + E: ::std::fmt::Debug, +{ + assert_eq!(to_string(&NaiveTime::from_hms(0, 0, 0)).ok(), Some(r#""00:00:00""#.into())); + assert_eq!( + to_string(&NaiveTime::from_hms_milli(0, 0, 0, 950)).ok(), + Some(r#""00:00:00.950""#.into()) + ); + assert_eq!( + to_string(&NaiveTime::from_hms_milli(0, 0, 59, 1_000)).ok(), + Some(r#""00:00:60""#.into()) + ); + assert_eq!(to_string(&NaiveTime::from_hms(0, 1, 2)).ok(), Some(r#""00:01:02""#.into())); + assert_eq!( + to_string(&NaiveTime::from_hms_nano(3, 5, 7, 98765432)).ok(), + Some(r#""03:05:07.098765432""#.into()) + ); + assert_eq!(to_string(&NaiveTime::from_hms(7, 8, 9)).ok(), Some(r#""07:08:09""#.into())); + assert_eq!( + to_string(&NaiveTime::from_hms_micro(12, 34, 56, 789)).ok(), + Some(r#""12:34:56.000789""#.into()) + ); + assert_eq!( + to_string(&NaiveTime::from_hms_nano(23, 59, 59, 1_999_999_999)).ok(), + Some(r#""23:59:60.999999999""#.into()) + ); +} + +#[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] +fn test_decodable_json<F, E>(from_str: F) +where + F: Fn(&str) -> Result<NaiveTime, E>, + E: ::std::fmt::Debug, +{ + assert_eq!(from_str(r#""00:00:00""#).ok(), Some(NaiveTime::from_hms(0, 0, 0))); + assert_eq!(from_str(r#""0:0:0""#).ok(), Some(NaiveTime::from_hms(0, 0, 0))); + assert_eq!(from_str(r#""00:00:00.950""#).ok(), Some(NaiveTime::from_hms_milli(0, 0, 0, 950))); + assert_eq!(from_str(r#""0:0:0.95""#).ok(), Some(NaiveTime::from_hms_milli(0, 0, 0, 950))); + assert_eq!(from_str(r#""00:00:60""#).ok(), Some(NaiveTime::from_hms_milli(0, 0, 59, 1_000))); + assert_eq!(from_str(r#""00:01:02""#).ok(), Some(NaiveTime::from_hms(0, 1, 2))); + assert_eq!( + from_str(r#""03:05:07.098765432""#).ok(), + Some(NaiveTime::from_hms_nano(3, 5, 7, 98765432)) + ); + assert_eq!(from_str(r#""07:08:09""#).ok(), Some(NaiveTime::from_hms(7, 8, 9))); + assert_eq!( + from_str(r#""12:34:56.000789""#).ok(), + Some(NaiveTime::from_hms_micro(12, 34, 56, 789)) + ); + assert_eq!( + from_str(r#""23:59:60.999999999""#).ok(), + Some(NaiveTime::from_hms_nano(23, 59, 59, 1_999_999_999)) + ); + assert_eq!( + from_str(r#""23:59:60.9999999999997""#).ok(), // excess digits are ignored + Some(NaiveTime::from_hms_nano(23, 59, 59, 1_999_999_999)) + ); + + // bad formats + assert!(from_str(r#""""#).is_err()); + assert!(from_str(r#""000000""#).is_err()); + assert!(from_str(r#""00:00:61""#).is_err()); + assert!(from_str(r#""00:60:00""#).is_err()); + assert!(from_str(r#""24:00:00""#).is_err()); + assert!(from_str(r#""23:59:59,1""#).is_err()); + assert!(from_str(r#""012:34:56""#).is_err()); + assert!(from_str(r#""hh:mm:ss""#).is_err()); + assert!(from_str(r#"0"#).is_err()); + assert!(from_str(r#"86399"#).is_err()); + assert!(from_str(r#"{}"#).is_err()); + // pre-0.3.0 rustc-serialize format is now invalid + assert!(from_str(r#"{"secs":0,"frac":0}"#).is_err()); + assert!(from_str(r#"null"#).is_err()); +} + +#[cfg(feature = "rustc-serialize")] +mod rustc_serialize { + use super::NaiveTime; + use rustc_serialize::{Decodable, Decoder, Encodable, Encoder}; + + impl Encodable for NaiveTime { + fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { + format!("{:?}", self).encode(s) + } + } + + impl Decodable for NaiveTime { + fn decode<D: Decoder>(d: &mut D) -> Result<NaiveTime, D::Error> { + d.read_str()?.parse().map_err(|_| d.error("invalid time")) + } + } + + #[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); + } +} + +#[cfg(feature = "serde")] +mod serde { + use super::NaiveTime; + use core::fmt; + use serdelib::{de, ser}; + + // TODO not very optimized for space (binary formats would want something better) + // TODO round-trip for general leap seconds (not just those with second = 60) + + impl ser::Serialize for NaiveTime { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: ser::Serializer, + { + serializer.collect_str(&self) + } + } + + struct NaiveTimeVisitor; + + impl<'de> de::Visitor<'de> for NaiveTimeVisitor { + type Value = NaiveTime; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + write!(formatter, "a formatted time string") + } + + fn visit_str<E>(self, value: &str) -> Result<NaiveTime, E> + where + E: de::Error, + { + value.parse().map_err(E::custom) + } + } + + impl<'de> de::Deserialize<'de> for NaiveTime { + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: de::Deserializer<'de>, + { + deserializer.deserialize_str(NaiveTimeVisitor) + } + } + + #[cfg(test)] + extern crate bincode; + #[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)); + } + + #[test] + fn test_serde_bincode() { + // Bincode is relevant to test separately from JSON because + // it is not self-describing. + use self::bincode::{deserialize, serialize, Infinite}; + + let t = NaiveTime::from_hms_nano(3, 5, 7, 98765432); + let encoded = serialize(&t, Infinite).unwrap(); + let decoded: NaiveTime = deserialize(&encoded).unwrap(); + assert_eq!(t, decoded); + } +} + +#[cfg(test)] +mod tests { + use super::NaiveTime; + use oldtime::Duration; + use std::u32; + use Timelike; + + #[test] + fn test_time_from_hms_milli() { + assert_eq!( + NaiveTime::from_hms_milli_opt(3, 5, 7, 0), + Some(NaiveTime::from_hms_nano(3, 5, 7, 0)) + ); + assert_eq!( + NaiveTime::from_hms_milli_opt(3, 5, 7, 777), + Some(NaiveTime::from_hms_nano(3, 5, 7, 777_000_000)) + ); + assert_eq!( + NaiveTime::from_hms_milli_opt(3, 5, 7, 1_999), + Some(NaiveTime::from_hms_nano(3, 5, 7, 1_999_000_000)) + ); + assert_eq!(NaiveTime::from_hms_milli_opt(3, 5, 7, 2_000), None); + assert_eq!(NaiveTime::from_hms_milli_opt(3, 5, 7, 5_000), None); // overflow check + assert_eq!(NaiveTime::from_hms_milli_opt(3, 5, 7, u32::MAX), None); + } + + #[test] + fn test_time_from_hms_micro() { + assert_eq!( + NaiveTime::from_hms_micro_opt(3, 5, 7, 0), + Some(NaiveTime::from_hms_nano(3, 5, 7, 0)) + ); + assert_eq!( + NaiveTime::from_hms_micro_opt(3, 5, 7, 333), + Some(NaiveTime::from_hms_nano(3, 5, 7, 333_000)) + ); + assert_eq!( + NaiveTime::from_hms_micro_opt(3, 5, 7, 777_777), + Some(NaiveTime::from_hms_nano(3, 5, 7, 777_777_000)) + ); + assert_eq!( + NaiveTime::from_hms_micro_opt(3, 5, 7, 1_999_999), + Some(NaiveTime::from_hms_nano(3, 5, 7, 1_999_999_000)) + ); + assert_eq!(NaiveTime::from_hms_micro_opt(3, 5, 7, 2_000_000), None); + assert_eq!(NaiveTime::from_hms_micro_opt(3, 5, 7, 5_000_000), None); // overflow check + assert_eq!(NaiveTime::from_hms_micro_opt(3, 5, 7, u32::MAX), None); + } + + #[test] + fn test_time_hms() { + assert_eq!(NaiveTime::from_hms(3, 5, 7).hour(), 3); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_hour(0), Some(NaiveTime::from_hms(0, 5, 7))); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_hour(23), Some(NaiveTime::from_hms(23, 5, 7))); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_hour(24), None); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_hour(u32::MAX), None); + + assert_eq!(NaiveTime::from_hms(3, 5, 7).minute(), 5); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_minute(0), Some(NaiveTime::from_hms(3, 0, 7))); + assert_eq!( + NaiveTime::from_hms(3, 5, 7).with_minute(59), + Some(NaiveTime::from_hms(3, 59, 7)) + ); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_minute(60), None); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_minute(u32::MAX), None); + + assert_eq!(NaiveTime::from_hms(3, 5, 7).second(), 7); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_second(0), Some(NaiveTime::from_hms(3, 5, 0))); + assert_eq!( + NaiveTime::from_hms(3, 5, 7).with_second(59), + Some(NaiveTime::from_hms(3, 5, 59)) + ); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_second(60), None); + assert_eq!(NaiveTime::from_hms(3, 5, 7).with_second(u32::MAX), None); + } + + #[test] + fn test_time_add() { + macro_rules! check { + ($lhs:expr, $rhs:expr, $sum:expr) => {{ + assert_eq!($lhs + $rhs, $sum); + //assert_eq!($rhs + $lhs, $sum); + }}; + } + + let hmsm = |h, m, s, mi| NaiveTime::from_hms_milli(h, m, s, mi); + + check!(hmsm(3, 5, 7, 900), Duration::zero(), hmsm(3, 5, 7, 900)); + check!(hmsm(3, 5, 7, 900), Duration::milliseconds(100), hmsm(3, 5, 8, 0)); + check!(hmsm(3, 5, 7, 1_300), Duration::milliseconds(-1800), hmsm(3, 5, 6, 500)); + check!(hmsm(3, 5, 7, 1_300), Duration::milliseconds(-800), hmsm(3, 5, 7, 500)); + check!(hmsm(3, 5, 7, 1_300), Duration::milliseconds(-100), hmsm(3, 5, 7, 1_200)); + check!(hmsm(3, 5, 7, 1_300), Duration::milliseconds(100), hmsm(3, 5, 7, 1_400)); + check!(hmsm(3, 5, 7, 1_300), Duration::milliseconds(800), hmsm(3, 5, 8, 100)); + check!(hmsm(3, 5, 7, 1_300), Duration::milliseconds(1800), hmsm(3, 5, 9, 100)); + check!(hmsm(3, 5, 7, 900), Duration::seconds(86399), hmsm(3, 5, 6, 900)); // overwrap + check!(hmsm(3, 5, 7, 900), Duration::seconds(-86399), hmsm(3, 5, 8, 900)); + check!(hmsm(3, 5, 7, 900), Duration::days(12345), hmsm(3, 5, 7, 900)); + check!(hmsm(3, 5, 7, 1_300), Duration::days(1), hmsm(3, 5, 7, 300)); + check!(hmsm(3, 5, 7, 1_300), Duration::days(-1), hmsm(3, 5, 8, 300)); + + // regression tests for #37 + check!(hmsm(0, 0, 0, 0), Duration::milliseconds(-990), hmsm(23, 59, 59, 10)); + check!(hmsm(0, 0, 0, 0), Duration::milliseconds(-9990), hmsm(23, 59, 50, 10)); + } + + #[test] + fn test_time_overflowing_add() { + let hmsm = NaiveTime::from_hms_milli; + + assert_eq!( + hmsm(3, 4, 5, 678).overflowing_add_signed(Duration::hours(11)), + (hmsm(14, 4, 5, 678), 0) + ); + assert_eq!( + hmsm(3, 4, 5, 678).overflowing_add_signed(Duration::hours(23)), + (hmsm(2, 4, 5, 678), 86_400) + ); + assert_eq!( + hmsm(3, 4, 5, 678).overflowing_add_signed(Duration::hours(-7)), + (hmsm(20, 4, 5, 678), -86_400) + ); + + // overflowing_add_signed with leap seconds may be counter-intuitive + assert_eq!( + hmsm(3, 4, 5, 1_678).overflowing_add_signed(Duration::days(1)), + (hmsm(3, 4, 5, 678), 86_400) + ); + assert_eq!( + hmsm(3, 4, 5, 1_678).overflowing_add_signed(Duration::days(-1)), + (hmsm(3, 4, 6, 678), -86_400) + ); + } + + #[test] + fn test_time_addassignment() { + let hms = NaiveTime::from_hms; + let mut time = hms(12, 12, 12); + time += Duration::hours(10); + assert_eq!(time, hms(22, 12, 12)); + time += Duration::hours(10); + assert_eq!(time, hms(8, 12, 12)); + } + + #[test] + fn test_time_subassignment() { + let hms = NaiveTime::from_hms; + let mut time = hms(12, 12, 12); + time -= Duration::hours(10); + assert_eq!(time, hms(2, 12, 12)); + time -= Duration::hours(10); + assert_eq!(time, hms(16, 12, 12)); + } + + #[test] + fn test_time_sub() { + macro_rules! check { + ($lhs:expr, $rhs:expr, $diff:expr) => {{ + // `time1 - time2 = duration` is equivalent to `time2 - time1 = -duration` + assert_eq!($lhs.signed_duration_since($rhs), $diff); + assert_eq!($rhs.signed_duration_since($lhs), -$diff); + }}; + } + + let hmsm = |h, m, s, mi| NaiveTime::from_hms_milli(h, m, s, mi); + + check!(hmsm(3, 5, 7, 900), hmsm(3, 5, 7, 900), Duration::zero()); + check!(hmsm(3, 5, 7, 900), hmsm(3, 5, 7, 600), Duration::milliseconds(300)); + check!(hmsm(3, 5, 7, 200), hmsm(2, 4, 6, 200), Duration::seconds(3600 + 60 + 1)); + check!( + hmsm(3, 5, 7, 200), + hmsm(2, 4, 6, 300), + Duration::seconds(3600 + 60) + Duration::milliseconds(900) + ); + + // treats the leap second as if it coincides with the prior non-leap second, + // as required by `time1 - time2 = duration` and `time2 - time1 = -duration` equivalence. + check!(hmsm(3, 5, 7, 200), hmsm(3, 5, 6, 1_800), Duration::milliseconds(400)); + check!(hmsm(3, 5, 7, 1_200), hmsm(3, 5, 6, 1_800), Duration::milliseconds(1400)); + check!(hmsm(3, 5, 7, 1_200), hmsm(3, 5, 6, 800), Duration::milliseconds(1400)); + + // additional equality: `time1 + duration = time2` is equivalent to + // `time2 - time1 = duration` IF AND ONLY IF `time2` represents a non-leap second. + assert_eq!(hmsm(3, 5, 6, 800) + Duration::milliseconds(400), hmsm(3, 5, 7, 200)); + assert_eq!(hmsm(3, 5, 6, 1_800) + Duration::milliseconds(400), hmsm(3, 5, 7, 200)); + } + + #[test] + fn test_time_fmt() { + assert_eq!(format!("{}", NaiveTime::from_hms_milli(23, 59, 59, 999)), "23:59:59.999"); + assert_eq!(format!("{}", NaiveTime::from_hms_milli(23, 59, 59, 1_000)), "23:59:60"); + assert_eq!(format!("{}", NaiveTime::from_hms_milli(23, 59, 59, 1_001)), "23:59:60.001"); + assert_eq!(format!("{}", NaiveTime::from_hms_micro(0, 0, 0, 43210)), "00:00:00.043210"); + assert_eq!(format!("{}", NaiveTime::from_hms_nano(0, 0, 0, 6543210)), "00:00:00.006543210"); + + // the format specifier should have no effect on `NaiveTime` + assert_eq!(format!("{:30}", NaiveTime::from_hms_milli(3, 5, 7, 9)), "03:05:07.009"); + } + + #[test] + fn test_date_from_str() { + // valid cases + let valid = [ + "0:0:0", + "0:0:0.0000000", + "0:0:0.0000003", + " 4 : 3 : 2.1 ", + " 09:08:07 ", + " 9:8:07 ", + "23:59:60.373929310237", + ]; + for &s in &valid { + let d = match s.parse::<NaiveTime>() { + 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::<NaiveTime>() { + 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::<NaiveTime>().is_err()); + assert!("x".parse::<NaiveTime>().is_err()); + assert!("15".parse::<NaiveTime>().is_err()); + assert!("15:8".parse::<NaiveTime>().is_err()); + assert!("15:8:x".parse::<NaiveTime>().is_err()); + assert!("15:8:9x".parse::<NaiveTime>().is_err()); + assert!("23:59:61".parse::<NaiveTime>().is_err()); + assert!("12:34:56.x".parse::<NaiveTime>().is_err()); + assert!("12:34:56. 0".parse::<NaiveTime>().is_err()); + } + + #[test] + fn test_time_parse_from_str() { + let hms = |h, m, s| NaiveTime::from_hms(h, m, s); + assert_eq!( + NaiveTime::parse_from_str("2014-5-7T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), + Ok(hms(12, 34, 56)) + ); // ignore date and offset + assert_eq!(NaiveTime::parse_from_str("PM 12:59", "%P %H:%M"), Ok(hms(12, 59, 0))); + assert!(NaiveTime::parse_from_str("12:3456", "%H:%M:%S").is_err()); + } + + #[test] + fn test_time_format() { + let t = NaiveTime::from_hms_nano(3, 5, 7, 98765432); + assert_eq!(t.format("%H,%k,%I,%l,%P,%p").to_string(), "03, 3,03, 3,am,AM"); + assert_eq!(t.format("%M").to_string(), "05"); + assert_eq!(t.format("%S,%f,%.f").to_string(), "07,098765432,.098765432"); + assert_eq!(t.format("%.3f,%.6f,%.9f").to_string(), ".098,.098765,.098765432"); + assert_eq!(t.format("%R").to_string(), "03:05"); + assert_eq!(t.format("%T,%X").to_string(), "03:05:07,03:05:07"); + assert_eq!(t.format("%r").to_string(), "03:05:07 AM"); + assert_eq!(t.format("%t%n%%%n%t").to_string(), "\t\n%\n\t"); + + let t = NaiveTime::from_hms_micro(3, 5, 7, 432100); + assert_eq!(t.format("%S,%f,%.f").to_string(), "07,432100000,.432100"); + assert_eq!(t.format("%.3f,%.6f,%.9f").to_string(), ".432,.432100,.432100000"); + + let t = NaiveTime::from_hms_milli(3, 5, 7, 210); + assert_eq!(t.format("%S,%f,%.f").to_string(), "07,210000000,.210"); + assert_eq!(t.format("%.3f,%.6f,%.9f").to_string(), ".210,.210000,.210000000"); + + let t = NaiveTime::from_hms(3, 5, 7); + assert_eq!(t.format("%S,%f,%.f").to_string(), "07,000000000,"); + assert_eq!(t.format("%.3f,%.6f,%.9f").to_string(), ".000,.000000,.000000000"); + + // corner cases + assert_eq!(NaiveTime::from_hms(13, 57, 9).format("%r").to_string(), "01:57:09 PM"); + assert_eq!( + NaiveTime::from_hms_milli(23, 59, 59, 1_000).format("%X").to_string(), + "23:59:60" + ); + } +} |