diff options
Diffstat (limited to 'src/format/parsed.rs')
| -rw-r--r-- | src/format/parsed.rs | 1283 |
1 files changed, 1283 insertions, 0 deletions
diff --git a/src/format/parsed.rs b/src/format/parsed.rs new file mode 100644 index 0000000..b8ed2d9 --- /dev/null +++ b/src/format/parsed.rs @@ -0,0 +1,1283 @@ +// This is a part of Chrono. +// See README.md and LICENSE.txt for details. + +//! A collection of parsed date and time items. +//! They can be constructed incrementally while being checked for consistency. + +use num_traits::ToPrimitive; +use oldtime::Duration as OldDuration; + +use super::{ParseResult, IMPOSSIBLE, NOT_ENOUGH, OUT_OF_RANGE}; +use div::div_rem; +use naive::{NaiveDate, NaiveDateTime, NaiveTime}; +use offset::{FixedOffset, LocalResult, Offset, TimeZone}; +use DateTime; +use Weekday; +use {Datelike, Timelike}; + +/// Parsed parts of date and time. There are two classes of methods: +/// +/// - `set_*` methods try to set given field(s) while checking for the consistency. +/// It may or may not check for the range constraint immediately (for efficiency reasons). +/// +/// - `to_*` methods try to make a concrete date and time value out of set fields. +/// It fully checks any remaining out-of-range conditions and inconsistent/impossible fields. +#[allow(missing_copy_implementations)] +#[derive(Clone, PartialEq, Debug)] +pub struct Parsed { + /// Year. + /// + /// This can be negative unlike [`year_div_100`](#structfield.year_div_100) + /// and [`year_mod_100`](#structfield.year_mod_100) fields. + pub year: Option<i32>, + + /// Year divided by 100. Implies that the year is >= 1 BCE when set. + /// + /// Due to the common usage, if this field is missing but + /// [`year_mod_100`](#structfield.year_mod_100) is present, + /// it is inferred to 19 when `year_mod_100 >= 70` and 20 otherwise. + pub year_div_100: Option<i32>, + + /// Year modulo 100. Implies that the year is >= 1 BCE when set. + pub year_mod_100: Option<i32>, + + /// Year in the [ISO week date](../naive/struct.NaiveDate.html#week-date). + /// + /// This can be negative unlike [`isoyear_div_100`](#structfield.isoyear_div_100) and + /// [`isoyear_mod_100`](#structfield.isoyear_mod_100) fields. + pub isoyear: Option<i32>, + + /// Year in the [ISO week date](../naive/struct.NaiveDate.html#week-date), divided by 100. + /// Implies that the year is >= 1 BCE when set. + /// + /// Due to the common usage, if this field is missing but + /// [`isoyear_mod_100`](#structfield.isoyear_mod_100) is present, + /// it is inferred to 19 when `isoyear_mod_100 >= 70` and 20 otherwise. + pub isoyear_div_100: Option<i32>, + + /// Year in the [ISO week date](../naive/struct.NaiveDate.html#week-date), modulo 100. + /// Implies that the year is >= 1 BCE when set. + pub isoyear_mod_100: Option<i32>, + + /// Month (1--12). + pub month: Option<u32>, + + /// Week number, where the week 1 starts at the first Sunday of January + /// (0--53, 1--53 or 1--52 depending on the year). + pub week_from_sun: Option<u32>, + + /// Week number, where the week 1 starts at the first Monday of January + /// (0--53, 1--53 or 1--52 depending on the year). + pub week_from_mon: Option<u32>, + + /// [ISO week number](../naive/struct.NaiveDate.html#week-date) + /// (1--52 or 1--53 depending on the year). + pub isoweek: Option<u32>, + + /// Day of the week. + pub weekday: Option<Weekday>, + + /// Day of the year (1--365 or 1--366 depending on the year). + pub ordinal: Option<u32>, + + /// Day of the month (1--28, 1--29, 1--30 or 1--31 depending on the month). + pub day: Option<u32>, + + /// Hour number divided by 12 (0--1). 0 indicates AM and 1 indicates PM. + pub hour_div_12: Option<u32>, + + /// Hour number modulo 12 (0--11). + pub hour_mod_12: Option<u32>, + + /// Minute number (0--59). + pub minute: Option<u32>, + + /// Second number (0--60, accounting for leap seconds). + pub second: Option<u32>, + + /// The number of nanoseconds since the whole second (0--999,999,999). + pub nanosecond: Option<u32>, + + /// The number of non-leap seconds since the midnight UTC on January 1, 1970. + /// + /// This can be off by one if [`second`](#structfield.second) is 60 (a leap second). + pub timestamp: Option<i64>, + + /// Offset from the local time to UTC, in seconds. + pub offset: Option<i32>, + + /// A dummy field to make this type not fully destructible (required for API stability). + _dummy: (), +} + +/// Checks if `old` is either empty or has the same value as `new` (i.e. "consistent"), +/// and if it is empty, set `old` to `new` as well. +#[inline] +fn set_if_consistent<T: PartialEq>(old: &mut Option<T>, new: T) -> ParseResult<()> { + if let Some(ref old) = *old { + if *old == new { + Ok(()) + } else { + Err(IMPOSSIBLE) + } + } else { + *old = Some(new); + Ok(()) + } +} + +impl Default for Parsed { + fn default() -> Parsed { + Parsed { + year: None, + year_div_100: None, + year_mod_100: None, + isoyear: None, + isoyear_div_100: None, + isoyear_mod_100: None, + month: None, + week_from_sun: None, + week_from_mon: None, + isoweek: None, + weekday: None, + ordinal: None, + day: None, + hour_div_12: None, + hour_mod_12: None, + minute: None, + second: None, + nanosecond: None, + timestamp: None, + offset: None, + _dummy: (), + } + } +} + +impl Parsed { + /// Returns the initial value of parsed parts. + pub fn new() -> Parsed { + Parsed::default() + } + + /// Tries to set the [`year`](#structfield.year) field from given value. + #[inline] + pub fn set_year(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.year, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`year_div_100`](#structfield.year_div_100) field from given value. + #[inline] + pub fn set_year_div_100(&mut self, value: i64) -> ParseResult<()> { + if value < 0 { + return Err(OUT_OF_RANGE); + } + set_if_consistent(&mut self.year_div_100, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`year_mod_100`](#structfield.year_mod_100) field from given value. + #[inline] + pub fn set_year_mod_100(&mut self, value: i64) -> ParseResult<()> { + if value < 0 { + return Err(OUT_OF_RANGE); + } + set_if_consistent(&mut self.year_mod_100, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`isoyear`](#structfield.isoyear) field from given value. + #[inline] + pub fn set_isoyear(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.isoyear, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`isoyear_div_100`](#structfield.isoyear_div_100) field from given value. + #[inline] + pub fn set_isoyear_div_100(&mut self, value: i64) -> ParseResult<()> { + if value < 0 { + return Err(OUT_OF_RANGE); + } + set_if_consistent(&mut self.isoyear_div_100, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`isoyear_mod_100`](#structfield.isoyear_mod_100) field from given value. + #[inline] + pub fn set_isoyear_mod_100(&mut self, value: i64) -> ParseResult<()> { + if value < 0 { + return Err(OUT_OF_RANGE); + } + set_if_consistent(&mut self.isoyear_mod_100, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`month`](#structfield.month) field from given value. + #[inline] + pub fn set_month(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.month, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`week_from_sun`](#structfield.week_from_sun) field from given value. + #[inline] + pub fn set_week_from_sun(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.week_from_sun, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`week_from_mon`](#structfield.week_from_mon) field from given value. + #[inline] + pub fn set_week_from_mon(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.week_from_mon, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`isoweek`](#structfield.isoweek) field from given value. + #[inline] + pub fn set_isoweek(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.isoweek, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`weekday`](#structfield.weekday) field from given value. + #[inline] + pub fn set_weekday(&mut self, value: Weekday) -> ParseResult<()> { + set_if_consistent(&mut self.weekday, value) + } + + /// Tries to set the [`ordinal`](#structfield.ordinal) field from given value. + #[inline] + pub fn set_ordinal(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.ordinal, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`day`](#structfield.day) field from given value. + #[inline] + pub fn set_day(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.day, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`hour_div_12`](#structfield.hour_div_12) field from given value. + /// (`false` for AM, `true` for PM) + #[inline] + pub fn set_ampm(&mut self, value: bool) -> ParseResult<()> { + set_if_consistent(&mut self.hour_div_12, if value { 1 } else { 0 }) + } + + /// Tries to set the [`hour_mod_12`](#structfield.hour_mod_12) field from + /// given hour number in 12-hour clocks. + #[inline] + pub fn set_hour12(&mut self, value: i64) -> ParseResult<()> { + if value < 1 || value > 12 { + return Err(OUT_OF_RANGE); + } + set_if_consistent(&mut self.hour_mod_12, value as u32 % 12) + } + + /// Tries to set both [`hour_div_12`](#structfield.hour_div_12) and + /// [`hour_mod_12`](#structfield.hour_mod_12) fields from given value. + #[inline] + pub fn set_hour(&mut self, value: i64) -> ParseResult<()> { + let v = value.to_u32().ok_or(OUT_OF_RANGE)?; + set_if_consistent(&mut self.hour_div_12, v / 12)?; + set_if_consistent(&mut self.hour_mod_12, v % 12)?; + Ok(()) + } + + /// Tries to set the [`minute`](#structfield.minute) field from given value. + #[inline] + pub fn set_minute(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.minute, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`second`](#structfield.second) field from given value. + #[inline] + pub fn set_second(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.second, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`nanosecond`](#structfield.nanosecond) field from given value. + #[inline] + pub fn set_nanosecond(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.nanosecond, value.to_u32().ok_or(OUT_OF_RANGE)?) + } + + /// Tries to set the [`timestamp`](#structfield.timestamp) field from given value. + #[inline] + pub fn set_timestamp(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.timestamp, value) + } + + /// Tries to set the [`offset`](#structfield.offset) field from given value. + #[inline] + pub fn set_offset(&mut self, value: i64) -> ParseResult<()> { + set_if_consistent(&mut self.offset, value.to_i32().ok_or(OUT_OF_RANGE)?) + } + + /// Returns a parsed naive date out of given fields. + /// + /// This method is able to determine the date from given subset of fields: + /// + /// - Year, month, day. + /// - Year, day of the year (ordinal). + /// - Year, week number counted from Sunday or Monday, day of the week. + /// - ISO week date. + /// + /// Gregorian year and ISO week date year can have their century number (`*_div_100`) omitted, + /// the two-digit year is used to guess the century number then. + pub fn to_naive_date(&self) -> ParseResult<NaiveDate> { + fn resolve_year( + y: Option<i32>, + q: Option<i32>, + r: Option<i32>, + ) -> ParseResult<Option<i32>> { + match (y, q, r) { + // if there is no further information, simply return the given full year. + // this is a common case, so let's avoid division here. + (y, None, None) => Ok(y), + + // if there is a full year *and* also quotient and/or modulo, + // check if present quotient and/or modulo is consistent to the full year. + // since the presence of those fields means a positive full year, + // we should filter a negative full year first. + (Some(y), q, r @ Some(0...99)) | (Some(y), q, r @ None) => { + if y < 0 { + return Err(OUT_OF_RANGE); + } + let (q_, r_) = div_rem(y, 100); + if q.unwrap_or(q_) == q_ && r.unwrap_or(r_) == r_ { + Ok(Some(y)) + } else { + Err(IMPOSSIBLE) + } + } + + // the full year is missing but we have quotient and modulo. + // reconstruct the full year. make sure that the result is always positive. + (None, Some(q), Some(r @ 0...99)) => { + if q < 0 { + return Err(OUT_OF_RANGE); + } + let y = q.checked_mul(100).and_then(|v| v.checked_add(r)); + Ok(Some(y.ok_or(OUT_OF_RANGE)?)) + } + + // we only have modulo. try to interpret a modulo as a conventional two-digit year. + // note: we are affected by Rust issue #18060. avoid multiple range patterns. + (None, None, Some(r @ 0...99)) => Ok(Some(r + if r < 70 { 2000 } else { 1900 })), + + // otherwise it is an out-of-bound or insufficient condition. + (None, Some(_), None) => Err(NOT_ENOUGH), + (_, _, Some(_)) => Err(OUT_OF_RANGE), + } + } + + let given_year = resolve_year(self.year, self.year_div_100, self.year_mod_100)?; + let given_isoyear = resolve_year(self.isoyear, self.isoyear_div_100, self.isoyear_mod_100)?; + + // verify the normal year-month-day date. + let verify_ymd = |date: NaiveDate| { + let year = date.year(); + let (year_div_100, year_mod_100) = if year >= 0 { + let (q, r) = div_rem(year, 100); + (Some(q), Some(r)) + } else { + (None, None) // they should be empty to be consistent + }; + let month = date.month(); + let day = date.day(); + self.year.unwrap_or(year) == year + && self.year_div_100.or(year_div_100) == year_div_100 + && self.year_mod_100.or(year_mod_100) == year_mod_100 + && self.month.unwrap_or(month) == month + && self.day.unwrap_or(day) == day + }; + + // verify the ISO week date. + let verify_isoweekdate = |date: NaiveDate| { + let week = date.iso_week(); + let isoyear = week.year(); + let isoweek = week.week(); + let weekday = date.weekday(); + let (isoyear_div_100, isoyear_mod_100) = if isoyear >= 0 { + let (q, r) = div_rem(isoyear, 100); + (Some(q), Some(r)) + } else { + (None, None) // they should be empty to be consistent + }; + self.isoyear.unwrap_or(isoyear) == isoyear + && self.isoyear_div_100.or(isoyear_div_100) == isoyear_div_100 + && self.isoyear_mod_100.or(isoyear_mod_100) == isoyear_mod_100 + && self.isoweek.unwrap_or(isoweek) == isoweek + && self.weekday.unwrap_or(weekday) == weekday + }; + + // verify the ordinal and other (non-ISO) week dates. + let verify_ordinal = |date: NaiveDate| { + let ordinal = date.ordinal(); + let weekday = date.weekday(); + let week_from_sun = (ordinal as i32 - weekday.num_days_from_sunday() as i32 + 7) / 7; + let week_from_mon = (ordinal as i32 - weekday.num_days_from_monday() as i32 + 7) / 7; + self.ordinal.unwrap_or(ordinal) == ordinal + && self.week_from_sun.map_or(week_from_sun, |v| v as i32) == week_from_sun + && self.week_from_mon.map_or(week_from_mon, |v| v as i32) == week_from_mon + }; + + // test several possibilities. + // tries to construct a full `NaiveDate` as much as possible, then verifies that + // it is consistent with other given fields. + let (verified, parsed_date) = match (given_year, given_isoyear, self) { + (Some(year), _, &Parsed { month: Some(month), day: Some(day), .. }) => { + // year, month, day + let date = NaiveDate::from_ymd_opt(year, month, day).ok_or(OUT_OF_RANGE)?; + (verify_isoweekdate(date) && verify_ordinal(date), date) + } + + (Some(year), _, &Parsed { ordinal: Some(ordinal), .. }) => { + // year, day of the year + let date = NaiveDate::from_yo_opt(year, ordinal).ok_or(OUT_OF_RANGE)?; + (verify_ymd(date) && verify_isoweekdate(date) && verify_ordinal(date), date) + } + + ( + Some(year), + _, + &Parsed { week_from_sun: Some(week_from_sun), weekday: Some(weekday), .. }, + ) => { + // year, week (starting at 1st Sunday), day of the week + let newyear = NaiveDate::from_yo_opt(year, 1).ok_or(OUT_OF_RANGE)?; + let firstweek = match newyear.weekday() { + Weekday::Sun => 0, + Weekday::Mon => 6, + Weekday::Tue => 5, + Weekday::Wed => 4, + Weekday::Thu => 3, + Weekday::Fri => 2, + Weekday::Sat => 1, + }; + + // `firstweek+1`-th day of January is the beginning of the week 1. + if week_from_sun > 53 { + return Err(OUT_OF_RANGE); + } // can it overflow? + let ndays = firstweek + + (week_from_sun as i32 - 1) * 7 + + weekday.num_days_from_sunday() as i32; + let date = newyear + .checked_add_signed(OldDuration::days(i64::from(ndays))) + .ok_or(OUT_OF_RANGE)?; + if date.year() != year { + return Err(OUT_OF_RANGE); + } // early exit for correct error + + (verify_ymd(date) && verify_isoweekdate(date) && verify_ordinal(date), date) + } + + ( + Some(year), + _, + &Parsed { week_from_mon: Some(week_from_mon), weekday: Some(weekday), .. }, + ) => { + // year, week (starting at 1st Monday), day of the week + let newyear = NaiveDate::from_yo_opt(year, 1).ok_or(OUT_OF_RANGE)?; + let firstweek = match newyear.weekday() { + Weekday::Sun => 1, + Weekday::Mon => 0, + Weekday::Tue => 6, + Weekday::Wed => 5, + Weekday::Thu => 4, + Weekday::Fri => 3, + Weekday::Sat => 2, + }; + + // `firstweek+1`-th day of January is the beginning of the week 1. + if week_from_mon > 53 { + return Err(OUT_OF_RANGE); + } // can it overflow? + let ndays = firstweek + + (week_from_mon as i32 - 1) * 7 + + weekday.num_days_from_monday() as i32; + let date = newyear + .checked_add_signed(OldDuration::days(i64::from(ndays))) + .ok_or(OUT_OF_RANGE)?; + if date.year() != year { + return Err(OUT_OF_RANGE); + } // early exit for correct error + + (verify_ymd(date) && verify_isoweekdate(date) && verify_ordinal(date), date) + } + + (_, Some(isoyear), &Parsed { isoweek: Some(isoweek), weekday: Some(weekday), .. }) => { + // ISO year, week, day of the week + let date = NaiveDate::from_isoywd_opt(isoyear, isoweek, weekday); + let date = date.ok_or(OUT_OF_RANGE)?; + (verify_ymd(date) && verify_ordinal(date), date) + } + + (_, _, _) => return Err(NOT_ENOUGH), + }; + + if verified { + Ok(parsed_date) + } else { + Err(IMPOSSIBLE) + } + } + + /// Returns a parsed naive time out of given fields. + /// + /// This method is able to determine the time from given subset of fields: + /// + /// - Hour, minute. (second and nanosecond assumed to be 0) + /// - Hour, minute, second. (nanosecond assumed to be 0) + /// - Hour, minute, second, nanosecond. + /// + /// It is able to handle leap seconds when given second is 60. + pub fn to_naive_time(&self) -> ParseResult<NaiveTime> { + let hour_div_12 = match self.hour_div_12 { + Some(v @ 0...1) => v, + Some(_) => return Err(OUT_OF_RANGE), + None => return Err(NOT_ENOUGH), + }; + let hour_mod_12 = match self.hour_mod_12 { + Some(v @ 0...11) => v, + Some(_) => return Err(OUT_OF_RANGE), + None => return Err(NOT_ENOUGH), + }; + let hour = hour_div_12 * 12 + hour_mod_12; + + let minute = match self.minute { + Some(v @ 0...59) => v, + Some(_) => return Err(OUT_OF_RANGE), + None => return Err(NOT_ENOUGH), + }; + + // we allow omitting seconds or nanoseconds, but they should be in the range. + let (second, mut nano) = match self.second.unwrap_or(0) { + v @ 0...59 => (v, 0), + 60 => (59, 1_000_000_000), + _ => return Err(OUT_OF_RANGE), + }; + nano += match self.nanosecond { + Some(v @ 0...999_999_999) if self.second.is_some() => v, + Some(0...999_999_999) => return Err(NOT_ENOUGH), // second is missing + Some(_) => return Err(OUT_OF_RANGE), + None => 0, + }; + + NaiveTime::from_hms_nano_opt(hour, minute, second, nano).ok_or(OUT_OF_RANGE) + } + + /// Returns a parsed naive date and time out of given fields, + /// except for the [`offset`](#structfield.offset) field (assumed to have a given value). + /// This is required for parsing a local time or other known-timezone inputs. + /// + /// This method is able to determine the combined date and time + /// from date and time fields or a single [`timestamp`](#structfield.timestamp) field. + /// Either way those fields have to be consistent to each other. + pub fn to_naive_datetime_with_offset(&self, offset: i32) -> ParseResult<NaiveDateTime> { + let date = self.to_naive_date(); + let time = self.to_naive_time(); + if let (Ok(date), Ok(time)) = (date, time) { + let datetime = date.and_time(time); + + // verify the timestamp field if any + // the following is safe, `timestamp` is very limited in range + let timestamp = datetime.timestamp() - i64::from(offset); + if let Some(given_timestamp) = self.timestamp { + // if `datetime` represents a leap second, it might be off by one second. + if given_timestamp != timestamp + && !(datetime.nanosecond() >= 1_000_000_000 && given_timestamp == timestamp + 1) + { + return Err(IMPOSSIBLE); + } + } + + Ok(datetime) + } else if let Some(timestamp) = self.timestamp { + use super::ParseError as PE; + use super::ParseErrorKind::{Impossible, OutOfRange}; + + // if date and time is problematic already, there is no point proceeding. + // we at least try to give a correct error though. + match (date, time) { + (Err(PE(OutOfRange)), _) | (_, Err(PE(OutOfRange))) => return Err(OUT_OF_RANGE), + (Err(PE(Impossible)), _) | (_, Err(PE(Impossible))) => return Err(IMPOSSIBLE), + (_, _) => {} // one of them is insufficient + } + + // reconstruct date and time fields from timestamp + let ts = timestamp.checked_add(i64::from(offset)).ok_or(OUT_OF_RANGE)?; + let datetime = NaiveDateTime::from_timestamp_opt(ts, 0); + let mut datetime = datetime.ok_or(OUT_OF_RANGE)?; + + // fill year, ordinal, hour, minute and second fields from timestamp. + // if existing fields are consistent, this will allow the full date/time reconstruction. + let mut parsed = self.clone(); + if parsed.second == Some(60) { + // `datetime.second()` cannot be 60, so this is the only case for a leap second. + match datetime.second() { + // it's okay, just do not try to overwrite the existing field. + 59 => {} + // `datetime` is known to be off by one second. + 0 => { + datetime -= OldDuration::seconds(1); + } + // otherwise it is impossible. + _ => return Err(IMPOSSIBLE), + } + // ...and we have the correct candidates for other fields. + } else { + parsed.set_second(i64::from(datetime.second()))?; + } + parsed.set_year(i64::from(datetime.year()))?; + parsed.set_ordinal(i64::from(datetime.ordinal()))?; // more efficient than ymd + parsed.set_hour(i64::from(datetime.hour()))?; + parsed.set_minute(i64::from(datetime.minute()))?; + + // validate other fields (e.g. week) and return + let date = parsed.to_naive_date()?; + let time = parsed.to_naive_time()?; + Ok(date.and_time(time)) + } else { + // reproduce the previous error(s) + date?; + time?; + unreachable!() + } + } + + /// Returns a parsed fixed time zone offset out of given fields. + pub fn to_fixed_offset(&self) -> ParseResult<FixedOffset> { + self.offset.and_then(FixedOffset::east_opt).ok_or(OUT_OF_RANGE) + } + + /// Returns a parsed timezone-aware date and time out of given fields. + /// + /// This method is able to determine the combined date and time + /// from date and time fields or a single [`timestamp`](#structfield.timestamp) field, + /// plus a time zone offset. + /// Either way those fields have to be consistent to each other. + pub fn to_datetime(&self) -> ParseResult<DateTime<FixedOffset>> { + let offset = self.offset.ok_or(NOT_ENOUGH)?; + let datetime = self.to_naive_datetime_with_offset(offset)?; + let offset = FixedOffset::east_opt(offset).ok_or(OUT_OF_RANGE)?; + match offset.from_local_datetime(&datetime) { + LocalResult::None => Err(IMPOSSIBLE), + LocalResult::Single(t) => Ok(t), + LocalResult::Ambiguous(..) => Err(NOT_ENOUGH), + } + } + + /// Returns a parsed timezone-aware date and time out of given fields, + /// with an additional `TimeZone` used to interpret and validate the local date. + /// + /// This method is able to determine the combined date and time + /// from date and time fields or a single [`timestamp`](#structfield.timestamp) field, + /// plus a time zone offset. + /// Either way those fields have to be consistent to each other. + /// If parsed fields include an UTC offset, it also has to be consistent to + /// [`offset`](#structfield.offset). + pub fn to_datetime_with_timezone<Tz: TimeZone>(&self, tz: &Tz) -> ParseResult<DateTime<Tz>> { + // if we have `timestamp` specified, guess an offset from that. + let mut guessed_offset = 0; + if let Some(timestamp) = self.timestamp { + // make a naive `DateTime` from given timestamp and (if any) nanosecond. + // an empty `nanosecond` is always equal to zero, so missing nanosecond is fine. + let nanosecond = self.nanosecond.unwrap_or(0); + let dt = NaiveDateTime::from_timestamp_opt(timestamp, nanosecond); + let dt = dt.ok_or(OUT_OF_RANGE)?; + guessed_offset = tz.offset_from_utc_datetime(&dt).fix().local_minus_utc(); + } + + // checks if the given `DateTime` has a consistent `Offset` with given `self.offset`. + let check_offset = |dt: &DateTime<Tz>| { + if let Some(offset) = self.offset { + dt.offset().fix().local_minus_utc() == offset + } else { + true + } + }; + + // `guessed_offset` should be correct when `self.timestamp` is given. + // it will be 0 otherwise, but this is fine as the algorithm ignores offset for that case. + let datetime = self.to_naive_datetime_with_offset(guessed_offset)?; + match tz.from_local_datetime(&datetime) { + LocalResult::None => Err(IMPOSSIBLE), + LocalResult::Single(t) => { + if check_offset(&t) { + Ok(t) + } else { + Err(IMPOSSIBLE) + } + } + LocalResult::Ambiguous(min, max) => { + // try to disambiguate two possible local dates by offset. + match (check_offset(&min), check_offset(&max)) { + (false, false) => Err(IMPOSSIBLE), + (false, true) => Ok(max), + (true, false) => Ok(min), + (true, true) => Err(NOT_ENOUGH), + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::super::{IMPOSSIBLE, NOT_ENOUGH, OUT_OF_RANGE}; + use super::Parsed; + use naive::{NaiveDate, NaiveTime, MAX_DATE, MIN_DATE}; + use offset::{FixedOffset, TimeZone, Utc}; + use Datelike; + use Weekday::*; + + #[test] + fn test_parsed_set_fields() { + // year*, isoyear* + let mut p = Parsed::new(); + assert_eq!(p.set_year(1987), Ok(())); + assert_eq!(p.set_year(1986), Err(IMPOSSIBLE)); + assert_eq!(p.set_year(1988), Err(IMPOSSIBLE)); + assert_eq!(p.set_year(1987), Ok(())); + assert_eq!(p.set_year_div_100(20), Ok(())); // independent to `year` + assert_eq!(p.set_year_div_100(21), Err(IMPOSSIBLE)); + assert_eq!(p.set_year_div_100(19), Err(IMPOSSIBLE)); + assert_eq!(p.set_year_mod_100(37), Ok(())); // ditto + assert_eq!(p.set_year_mod_100(38), Err(IMPOSSIBLE)); + assert_eq!(p.set_year_mod_100(36), Err(IMPOSSIBLE)); + + let mut p = Parsed::new(); + assert_eq!(p.set_year(0), Ok(())); + assert_eq!(p.set_year_div_100(0), Ok(())); + assert_eq!(p.set_year_mod_100(0), Ok(())); + + let mut p = Parsed::new(); + assert_eq!(p.set_year_div_100(-1), Err(OUT_OF_RANGE)); + assert_eq!(p.set_year_mod_100(-1), Err(OUT_OF_RANGE)); + assert_eq!(p.set_year(-1), Ok(())); + assert_eq!(p.set_year(-2), Err(IMPOSSIBLE)); + assert_eq!(p.set_year(0), Err(IMPOSSIBLE)); + + let mut p = Parsed::new(); + assert_eq!(p.set_year_div_100(0x1_0000_0008), Err(OUT_OF_RANGE)); + assert_eq!(p.set_year_div_100(8), Ok(())); + assert_eq!(p.set_year_div_100(0x1_0000_0008), Err(OUT_OF_RANGE)); + + // month, week*, isoweek, ordinal, day, minute, second, nanosecond, offset + let mut p = Parsed::new(); + assert_eq!(p.set_month(7), Ok(())); + assert_eq!(p.set_month(1), Err(IMPOSSIBLE)); + assert_eq!(p.set_month(6), Err(IMPOSSIBLE)); + assert_eq!(p.set_month(8), Err(IMPOSSIBLE)); + assert_eq!(p.set_month(12), Err(IMPOSSIBLE)); + + let mut p = Parsed::new(); + assert_eq!(p.set_month(8), Ok(())); + assert_eq!(p.set_month(0x1_0000_0008), Err(OUT_OF_RANGE)); + + // hour + let mut p = Parsed::new(); + assert_eq!(p.set_hour(12), Ok(())); + assert_eq!(p.set_hour(11), Err(IMPOSSIBLE)); + assert_eq!(p.set_hour(13), Err(IMPOSSIBLE)); + assert_eq!(p.set_hour(12), Ok(())); + assert_eq!(p.set_ampm(false), Err(IMPOSSIBLE)); + assert_eq!(p.set_ampm(true), Ok(())); + assert_eq!(p.set_hour12(12), Ok(())); + assert_eq!(p.set_hour12(0), Err(OUT_OF_RANGE)); // requires canonical representation + assert_eq!(p.set_hour12(1), Err(IMPOSSIBLE)); + assert_eq!(p.set_hour12(11), Err(IMPOSSIBLE)); + + let mut p = Parsed::new(); + assert_eq!(p.set_ampm(true), Ok(())); + assert_eq!(p.set_hour12(7), Ok(())); + assert_eq!(p.set_hour(7), Err(IMPOSSIBLE)); + assert_eq!(p.set_hour(18), Err(IMPOSSIBLE)); + assert_eq!(p.set_hour(19), Ok(())); + + // timestamp + let mut p = Parsed::new(); + assert_eq!(p.set_timestamp(1_234_567_890), Ok(())); + assert_eq!(p.set_timestamp(1_234_567_889), Err(IMPOSSIBLE)); + assert_eq!(p.set_timestamp(1_234_567_891), Err(IMPOSSIBLE)); + } + + #[test] + fn test_parsed_to_naive_date() { + macro_rules! parse { + ($($k:ident: $v:expr),*) => ( + Parsed { $($k: Some($v),)* ..Parsed::new() }.to_naive_date() + ) + } + + let ymd = |y, m, d| Ok(NaiveDate::from_ymd(y, m, d)); + + // ymd: omission of fields + assert_eq!(parse!(), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 1984), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 1984, month: 1), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 1984, month: 1, day: 2), ymd(1984, 1, 2)); + assert_eq!(parse!(year: 1984, day: 2), Err(NOT_ENOUGH)); + assert_eq!(parse!(year_div_100: 19), Err(NOT_ENOUGH)); + assert_eq!(parse!(year_div_100: 19, year_mod_100: 84), Err(NOT_ENOUGH)); + assert_eq!(parse!(year_div_100: 19, year_mod_100: 84, month: 1), Err(NOT_ENOUGH)); + assert_eq!(parse!(year_div_100: 19, year_mod_100: 84, month: 1, day: 2), ymd(1984, 1, 2)); + assert_eq!(parse!(year_div_100: 19, year_mod_100: 84, day: 2), Err(NOT_ENOUGH)); + assert_eq!(parse!(year_div_100: 19, month: 1, day: 2), Err(NOT_ENOUGH)); + assert_eq!(parse!(year_mod_100: 70, month: 1, day: 2), ymd(1970, 1, 2)); + assert_eq!(parse!(year_mod_100: 69, month: 1, day: 2), ymd(2069, 1, 2)); + + // ymd: out-of-range conditions + assert_eq!(parse!(year_div_100: 19, year_mod_100: 84, month: 2, day: 29), ymd(1984, 2, 29)); + assert_eq!( + parse!(year_div_100: 19, year_mod_100: 83, month: 2, day: 29), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(year_div_100: 19, year_mod_100: 83, month: 13, day: 1), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(year_div_100: 19, year_mod_100: 83, month: 12, day: 31), + ymd(1983, 12, 31) + ); + assert_eq!( + parse!(year_div_100: 19, year_mod_100: 83, month: 12, day: 32), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(year_div_100: 19, year_mod_100: 83, month: 12, day: 0), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(year_div_100: 19, year_mod_100: 100, month: 1, day: 1), + Err(OUT_OF_RANGE) + ); + assert_eq!(parse!(year_div_100: 19, year_mod_100: -1, month: 1, day: 1), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year_div_100: 0, year_mod_100: 0, month: 1, day: 1), ymd(0, 1, 1)); + assert_eq!(parse!(year_div_100: -1, year_mod_100: 42, month: 1, day: 1), Err(OUT_OF_RANGE)); + let max_year = MAX_DATE.year(); + assert_eq!( + parse!(year_div_100: max_year / 100, + year_mod_100: max_year % 100, month: 1, day: 1), + ymd(max_year, 1, 1) + ); + assert_eq!( + parse!(year_div_100: (max_year + 1) / 100, + year_mod_100: (max_year + 1) % 100, month: 1, day: 1), + Err(OUT_OF_RANGE) + ); + + // ymd: conflicting inputs + assert_eq!(parse!(year: 1984, year_div_100: 19, month: 1, day: 1), ymd(1984, 1, 1)); + assert_eq!(parse!(year: 1984, year_div_100: 20, month: 1, day: 1), Err(IMPOSSIBLE)); + assert_eq!(parse!(year: 1984, year_mod_100: 84, month: 1, day: 1), ymd(1984, 1, 1)); + assert_eq!(parse!(year: 1984, year_mod_100: 83, month: 1, day: 1), Err(IMPOSSIBLE)); + assert_eq!( + parse!(year: 1984, year_div_100: 19, year_mod_100: 84, month: 1, day: 1), + ymd(1984, 1, 1) + ); + assert_eq!( + parse!(year: 1984, year_div_100: 18, year_mod_100: 94, month: 1, day: 1), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(year: 1984, year_div_100: 18, year_mod_100: 184, month: 1, day: 1), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(year: -1, year_div_100: 0, year_mod_100: -1, month: 1, day: 1), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(year: -1, year_div_100: -1, year_mod_100: 99, month: 1, day: 1), + Err(OUT_OF_RANGE) + ); + assert_eq!(parse!(year: -1, year_div_100: 0, month: 1, day: 1), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: -1, year_mod_100: 99, month: 1, day: 1), Err(OUT_OF_RANGE)); + + // weekdates + assert_eq!(parse!(year: 2000, week_from_mon: 0), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 2000, week_from_sun: 0), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 2000, weekday: Sun), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 2000, week_from_mon: 0, weekday: Fri), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2000, week_from_sun: 0, weekday: Fri), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2000, week_from_mon: 0, weekday: Sat), ymd(2000, 1, 1)); + assert_eq!(parse!(year: 2000, week_from_sun: 0, weekday: Sat), ymd(2000, 1, 1)); + assert_eq!(parse!(year: 2000, week_from_mon: 0, weekday: Sun), ymd(2000, 1, 2)); + assert_eq!(parse!(year: 2000, week_from_sun: 1, weekday: Sun), ymd(2000, 1, 2)); + assert_eq!(parse!(year: 2000, week_from_mon: 1, weekday: Mon), ymd(2000, 1, 3)); + assert_eq!(parse!(year: 2000, week_from_sun: 1, weekday: Mon), ymd(2000, 1, 3)); + assert_eq!(parse!(year: 2000, week_from_mon: 1, weekday: Sat), ymd(2000, 1, 8)); + assert_eq!(parse!(year: 2000, week_from_sun: 1, weekday: Sat), ymd(2000, 1, 8)); + assert_eq!(parse!(year: 2000, week_from_mon: 1, weekday: Sun), ymd(2000, 1, 9)); + assert_eq!(parse!(year: 2000, week_from_sun: 2, weekday: Sun), ymd(2000, 1, 9)); + assert_eq!(parse!(year: 2000, week_from_mon: 2, weekday: Mon), ymd(2000, 1, 10)); + assert_eq!(parse!(year: 2000, week_from_sun: 52, weekday: Sat), ymd(2000, 12, 30)); + assert_eq!(parse!(year: 2000, week_from_sun: 53, weekday: Sun), ymd(2000, 12, 31)); + assert_eq!(parse!(year: 2000, week_from_sun: 53, weekday: Mon), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2000, week_from_sun: 0xffffffff, weekday: Mon), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2006, week_from_sun: 0, weekday: Sat), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2006, week_from_sun: 1, weekday: Sun), ymd(2006, 1, 1)); + + // weekdates: conflicting inputs + assert_eq!( + parse!(year: 2000, week_from_mon: 1, week_from_sun: 1, weekday: Sat), + ymd(2000, 1, 8) + ); + assert_eq!( + parse!(year: 2000, week_from_mon: 1, week_from_sun: 2, weekday: Sun), + ymd(2000, 1, 9) + ); + assert_eq!( + parse!(year: 2000, week_from_mon: 1, week_from_sun: 1, weekday: Sun), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(year: 2000, week_from_mon: 2, week_from_sun: 2, weekday: Sun), + Err(IMPOSSIBLE) + ); + + // ISO weekdates + assert_eq!(parse!(isoyear: 2004, isoweek: 53), Err(NOT_ENOUGH)); + assert_eq!(parse!(isoyear: 2004, isoweek: 53, weekday: Fri), ymd(2004, 12, 31)); + assert_eq!(parse!(isoyear: 2004, isoweek: 53, weekday: Sat), ymd(2005, 1, 1)); + assert_eq!(parse!(isoyear: 2004, isoweek: 0xffffffff, weekday: Sat), Err(OUT_OF_RANGE)); + assert_eq!(parse!(isoyear: 2005, isoweek: 0, weekday: Thu), Err(OUT_OF_RANGE)); + assert_eq!(parse!(isoyear: 2005, isoweek: 5, weekday: Thu), ymd(2005, 2, 3)); + assert_eq!(parse!(isoyear: 2005, weekday: Thu), Err(NOT_ENOUGH)); + + // year and ordinal + assert_eq!(parse!(ordinal: 123), Err(NOT_ENOUGH)); + assert_eq!(parse!(year: 2000, ordinal: 0), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2000, ordinal: 1), ymd(2000, 1, 1)); + assert_eq!(parse!(year: 2000, ordinal: 60), ymd(2000, 2, 29)); + assert_eq!(parse!(year: 2000, ordinal: 61), ymd(2000, 3, 1)); + assert_eq!(parse!(year: 2000, ordinal: 366), ymd(2000, 12, 31)); + assert_eq!(parse!(year: 2000, ordinal: 367), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2000, ordinal: 0xffffffff), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2100, ordinal: 0), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2100, ordinal: 1), ymd(2100, 1, 1)); + assert_eq!(parse!(year: 2100, ordinal: 59), ymd(2100, 2, 28)); + assert_eq!(parse!(year: 2100, ordinal: 60), ymd(2100, 3, 1)); + assert_eq!(parse!(year: 2100, ordinal: 365), ymd(2100, 12, 31)); + assert_eq!(parse!(year: 2100, ordinal: 366), Err(OUT_OF_RANGE)); + assert_eq!(parse!(year: 2100, ordinal: 0xffffffff), Err(OUT_OF_RANGE)); + + // more complex cases + assert_eq!( + parse!(year: 2014, month: 12, day: 31, ordinal: 365, isoyear: 2015, isoweek: 1, + week_from_sun: 52, week_from_mon: 52, weekday: Wed), + ymd(2014, 12, 31) + ); + assert_eq!( + parse!(year: 2014, month: 12, ordinal: 365, isoyear: 2015, isoweek: 1, + week_from_sun: 52, week_from_mon: 52), + ymd(2014, 12, 31) + ); + assert_eq!( + parse!(year: 2014, month: 12, day: 31, ordinal: 365, isoyear: 2014, isoweek: 53, + week_from_sun: 52, week_from_mon: 52, weekday: Wed), + Err(IMPOSSIBLE) + ); // no ISO week date 2014-W53-3 + assert_eq!( + parse!(year: 2012, isoyear: 2015, isoweek: 1, + week_from_sun: 52, week_from_mon: 52), + Err(NOT_ENOUGH) + ); // ambiguous (2014-12-29, 2014-12-30, 2014-12-31) + assert_eq!(parse!(year_div_100: 20, isoyear_mod_100: 15, ordinal: 366), Err(NOT_ENOUGH)); + // technically unique (2014-12-31) but Chrono gives up + } + + #[test] + fn test_parsed_to_naive_time() { + macro_rules! parse { + ($($k:ident: $v:expr),*) => ( + Parsed { $($k: Some($v),)* ..Parsed::new() }.to_naive_time() + ) + } + + let hms = |h, m, s| Ok(NaiveTime::from_hms(h, m, s)); + let hmsn = |h, m, s, n| Ok(NaiveTime::from_hms_nano(h, m, s, n)); + + // omission of fields + assert_eq!(parse!(), Err(NOT_ENOUGH)); + assert_eq!(parse!(hour_div_12: 0), Err(NOT_ENOUGH)); + assert_eq!(parse!(hour_div_12: 0, hour_mod_12: 1), Err(NOT_ENOUGH)); + assert_eq!(parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23), hms(1, 23, 0)); + assert_eq!(parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, second: 45), hms(1, 23, 45)); + assert_eq!( + parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, second: 45, + nanosecond: 678_901_234), + hmsn(1, 23, 45, 678_901_234) + ); + assert_eq!(parse!(hour_div_12: 1, hour_mod_12: 11, minute: 45, second: 6), hms(23, 45, 6)); + assert_eq!(parse!(hour_mod_12: 1, minute: 23), Err(NOT_ENOUGH)); + assert_eq!( + parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, nanosecond: 456_789_012), + Err(NOT_ENOUGH) + ); + + // out-of-range conditions + assert_eq!(parse!(hour_div_12: 2, hour_mod_12: 0, minute: 0), Err(OUT_OF_RANGE)); + assert_eq!(parse!(hour_div_12: 1, hour_mod_12: 12, minute: 0), Err(OUT_OF_RANGE)); + assert_eq!(parse!(hour_div_12: 0, hour_mod_12: 1, minute: 60), Err(OUT_OF_RANGE)); + assert_eq!( + parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, second: 61), + Err(OUT_OF_RANGE) + ); + assert_eq!( + parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, second: 34, + nanosecond: 1_000_000_000), + Err(OUT_OF_RANGE) + ); + + // leap seconds + assert_eq!( + parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, second: 60), + hmsn(1, 23, 59, 1_000_000_000) + ); + assert_eq!( + parse!(hour_div_12: 0, hour_mod_12: 1, minute: 23, second: 60, + nanosecond: 999_999_999), + hmsn(1, 23, 59, 1_999_999_999) + ); + } + + #[test] + fn test_parsed_to_naive_datetime_with_offset() { + macro_rules! parse { + (offset = $offset:expr; $($k:ident: $v:expr),*) => ( + Parsed { $($k: Some($v),)* ..Parsed::new() }.to_naive_datetime_with_offset($offset) + ); + ($($k:ident: $v:expr),*) => (parse!(offset = 0; $($k: $v),*)) + } + + let ymdhms = |y, m, d, h, n, s| Ok(NaiveDate::from_ymd(y, m, d).and_hms(h, n, s)); + let ymdhmsn = + |y, m, d, h, n, s, nano| Ok(NaiveDate::from_ymd(y, m, d).and_hms_nano(h, n, s, nano)); + + // omission of fields + assert_eq!(parse!(), Err(NOT_ENOUGH)); + assert_eq!( + parse!(year: 2015, month: 1, day: 30, + hour_div_12: 1, hour_mod_12: 2, minute: 38), + ymdhms(2015, 1, 30, 14, 38, 0) + ); + assert_eq!( + parse!(year: 1997, month: 1, day: 30, + hour_div_12: 1, hour_mod_12: 2, minute: 38, second: 5), + ymdhms(1997, 1, 30, 14, 38, 5) + ); + assert_eq!( + parse!(year: 2012, ordinal: 34, hour_div_12: 0, hour_mod_12: 5, + minute: 6, second: 7, nanosecond: 890_123_456), + ymdhmsn(2012, 2, 3, 5, 6, 7, 890_123_456) + ); + assert_eq!(parse!(timestamp: 0), ymdhms(1970, 1, 1, 0, 0, 0)); + assert_eq!(parse!(timestamp: 1, nanosecond: 0), ymdhms(1970, 1, 1, 0, 0, 1)); + assert_eq!(parse!(timestamp: 1, nanosecond: 1), ymdhmsn(1970, 1, 1, 0, 0, 1, 1)); + assert_eq!(parse!(timestamp: 1_420_000_000), ymdhms(2014, 12, 31, 4, 26, 40)); + assert_eq!(parse!(timestamp: -0x1_0000_0000), ymdhms(1833, 11, 24, 17, 31, 44)); + + // full fields + assert_eq!( + parse!(year: 2014, year_div_100: 20, year_mod_100: 14, month: 12, day: 31, + ordinal: 365, isoyear: 2015, isoyear_div_100: 20, isoyear_mod_100: 15, + isoweek: 1, week_from_sun: 52, week_from_mon: 52, weekday: Wed, + hour_div_12: 0, hour_mod_12: 4, minute: 26, second: 40, + nanosecond: 12_345_678, timestamp: 1_420_000_000), + ymdhmsn(2014, 12, 31, 4, 26, 40, 12_345_678) + ); + assert_eq!( + parse!(year: 2014, year_div_100: 20, year_mod_100: 14, month: 12, day: 31, + ordinal: 365, isoyear: 2015, isoyear_div_100: 20, isoyear_mod_100: 15, + isoweek: 1, week_from_sun: 52, week_from_mon: 52, weekday: Wed, + hour_div_12: 0, hour_mod_12: 4, minute: 26, second: 40, + nanosecond: 12_345_678, timestamp: 1_419_999_999), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(offset = 32400; + year: 2014, year_div_100: 20, year_mod_100: 14, month: 12, day: 31, + ordinal: 365, isoyear: 2015, isoyear_div_100: 20, isoyear_mod_100: 15, + isoweek: 1, week_from_sun: 52, week_from_mon: 52, weekday: Wed, + hour_div_12: 0, hour_mod_12: 4, minute: 26, second: 40, + nanosecond: 12_345_678, timestamp: 1_419_967_600), + ymdhmsn(2014, 12, 31, 4, 26, 40, 12_345_678) + ); + + // more timestamps + let max_days_from_year_1970 = + MAX_DATE.signed_duration_since(NaiveDate::from_ymd(1970, 1, 1)); + let year_0_from_year_1970 = + NaiveDate::from_ymd(0, 1, 1).signed_duration_since(NaiveDate::from_ymd(1970, 1, 1)); + let min_days_from_year_1970 = + MIN_DATE.signed_duration_since(NaiveDate::from_ymd(1970, 1, 1)); + assert_eq!( + parse!(timestamp: min_days_from_year_1970.num_seconds()), + ymdhms(MIN_DATE.year(), 1, 1, 0, 0, 0) + ); + assert_eq!( + parse!(timestamp: year_0_from_year_1970.num_seconds()), + ymdhms(0, 1, 1, 0, 0, 0) + ); + assert_eq!( + parse!(timestamp: max_days_from_year_1970.num_seconds() + 86399), + ymdhms(MAX_DATE.year(), 12, 31, 23, 59, 59) + ); + + // leap seconds #1: partial fields + assert_eq!(parse!(second: 59, timestamp: 1_341_100_798), Err(IMPOSSIBLE)); + assert_eq!(parse!(second: 59, timestamp: 1_341_100_799), ymdhms(2012, 6, 30, 23, 59, 59)); + assert_eq!(parse!(second: 59, timestamp: 1_341_100_800), Err(IMPOSSIBLE)); + assert_eq!( + parse!(second: 60, timestamp: 1_341_100_799), + ymdhmsn(2012, 6, 30, 23, 59, 59, 1_000_000_000) + ); + assert_eq!( + parse!(second: 60, timestamp: 1_341_100_800), + ymdhmsn(2012, 6, 30, 23, 59, 59, 1_000_000_000) + ); + assert_eq!(parse!(second: 0, timestamp: 1_341_100_800), ymdhms(2012, 7, 1, 0, 0, 0)); + assert_eq!(parse!(second: 1, timestamp: 1_341_100_800), Err(IMPOSSIBLE)); + assert_eq!(parse!(second: 60, timestamp: 1_341_100_801), Err(IMPOSSIBLE)); + + // leap seconds #2: full fields + // we need to have separate tests for them since it uses another control flow. + assert_eq!( + parse!(year: 2012, ordinal: 182, hour_div_12: 1, hour_mod_12: 11, + minute: 59, second: 59, timestamp: 1_341_100_798), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(year: 2012, ordinal: 182, hour_div_12: 1, hour_mod_12: 11, + minute: 59, second: 59, timestamp: 1_341_100_799), + ymdhms(2012, 6, 30, 23, 59, 59) + ); + assert_eq!( + parse!(year: 2012, ordinal: 182, hour_div_12: 1, hour_mod_12: 11, + minute: 59, second: 59, timestamp: 1_341_100_800), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(year: 2012, ordinal: 182, hour_div_12: 1, hour_mod_12: 11, + minute: 59, second: 60, timestamp: 1_341_100_799), + ymdhmsn(2012, 6, 30, 23, 59, 59, 1_000_000_000) + ); + assert_eq!( + parse!(year: 2012, ordinal: 182, hour_div_12: 1, hour_mod_12: 11, + minute: 59, second: 60, timestamp: 1_341_100_800), + ymdhmsn(2012, 6, 30, 23, 59, 59, 1_000_000_000) + ); + assert_eq!( + parse!(year: 2012, ordinal: 183, hour_div_12: 0, hour_mod_12: 0, + minute: 0, second: 0, timestamp: 1_341_100_800), + ymdhms(2012, 7, 1, 0, 0, 0) + ); + assert_eq!( + parse!(year: 2012, ordinal: 183, hour_div_12: 0, hour_mod_12: 0, + minute: 0, second: 1, timestamp: 1_341_100_800), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(year: 2012, ordinal: 182, hour_div_12: 1, hour_mod_12: 11, + minute: 59, second: 60, timestamp: 1_341_100_801), + Err(IMPOSSIBLE) + ); + + // error codes + assert_eq!( + parse!(year: 2015, month: 1, day: 20, weekday: Tue, + hour_div_12: 2, hour_mod_12: 1, minute: 35, second: 20), + Err(OUT_OF_RANGE) + ); // `hour_div_12` is out of range + } + + #[test] + fn test_parsed_to_datetime() { + macro_rules! parse { + ($($k:ident: $v:expr),*) => ( + Parsed { $($k: Some($v),)* ..Parsed::new() }.to_datetime() + ) + } + + let ymdhmsn = |y, m, d, h, n, s, nano, off| { + Ok(FixedOffset::east(off).ymd(y, m, d).and_hms_nano(h, n, s, nano)) + }; + + assert_eq!(parse!(offset: 0), Err(NOT_ENOUGH)); + assert_eq!( + parse!(year: 2014, ordinal: 365, hour_div_12: 0, hour_mod_12: 4, + minute: 26, second: 40, nanosecond: 12_345_678), + Err(NOT_ENOUGH) + ); + assert_eq!( + parse!(year: 2014, ordinal: 365, hour_div_12: 0, hour_mod_12: 4, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 0), + ymdhmsn(2014, 12, 31, 4, 26, 40, 12_345_678, 0) + ); + assert_eq!( + parse!(year: 2014, ordinal: 365, hour_div_12: 1, hour_mod_12: 1, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 32400), + ymdhmsn(2014, 12, 31, 13, 26, 40, 12_345_678, 32400) + ); + assert_eq!( + parse!(year: 2014, ordinal: 365, hour_div_12: 0, hour_mod_12: 1, + minute: 42, second: 4, nanosecond: 12_345_678, offset: -9876), + ymdhmsn(2014, 12, 31, 1, 42, 4, 12_345_678, -9876) + ); + assert_eq!( + parse!(year: 2015, ordinal: 1, hour_div_12: 0, hour_mod_12: 4, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 86_400), + Err(OUT_OF_RANGE) + ); // `FixedOffset` does not support such huge offset + } + + #[test] + fn test_parsed_to_datetime_with_timezone() { + macro_rules! parse { + ($tz:expr; $($k:ident: $v:expr),*) => ( + Parsed { $($k: Some($v),)* ..Parsed::new() }.to_datetime_with_timezone(&$tz) + ) + } + + // single result from ymdhms + assert_eq!( + parse!(Utc; + year: 2014, ordinal: 365, hour_div_12: 0, hour_mod_12: 4, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 0), + Ok(Utc.ymd(2014, 12, 31).and_hms_nano(4, 26, 40, 12_345_678)) + ); + assert_eq!( + parse!(Utc; + year: 2014, ordinal: 365, hour_div_12: 1, hour_mod_12: 1, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 32400), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(FixedOffset::east(32400); + year: 2014, ordinal: 365, hour_div_12: 0, hour_mod_12: 4, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 0), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(FixedOffset::east(32400); + year: 2014, ordinal: 365, hour_div_12: 1, hour_mod_12: 1, + minute: 26, second: 40, nanosecond: 12_345_678, offset: 32400), + Ok(FixedOffset::east(32400).ymd(2014, 12, 31).and_hms_nano(13, 26, 40, 12_345_678)) + ); + + // single result from timestamp + assert_eq!( + parse!(Utc; timestamp: 1_420_000_000, offset: 0), + Ok(Utc.ymd(2014, 12, 31).and_hms(4, 26, 40)) + ); + assert_eq!(parse!(Utc; timestamp: 1_420_000_000, offset: 32400), Err(IMPOSSIBLE)); + assert_eq!( + parse!(FixedOffset::east(32400); timestamp: 1_420_000_000, offset: 0), + Err(IMPOSSIBLE) + ); + assert_eq!( + parse!(FixedOffset::east(32400); timestamp: 1_420_000_000, offset: 32400), + Ok(FixedOffset::east(32400).ymd(2014, 12, 31).and_hms(13, 26, 40)) + ); + + // TODO test with a variable time zone (for None and Ambiguous cases) + } +} |