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Diffstat (limited to 'src/format/parse.rs')
| -rw-r--r-- | src/format/parse.rs | 934 |
1 files changed, 934 insertions, 0 deletions
diff --git a/src/format/parse.rs b/src/format/parse.rs new file mode 100644 index 0000000..2fce827 --- /dev/null +++ b/src/format/parse.rs @@ -0,0 +1,934 @@ +// This is a part of Chrono. +// Portions copyright (c) 2015, John Nagle. +// See README.md and LICENSE.txt for details. + +//! Date and time parsing routines. + +#![allow(deprecated)] + +use core::borrow::Borrow; +use core::str; +use core::usize; + +use super::scan; +use super::{Fixed, InternalFixed, InternalInternal, Item, Numeric, Pad, Parsed}; +use super::{ParseError, ParseErrorKind, ParseResult}; +use super::{BAD_FORMAT, INVALID, NOT_ENOUGH, OUT_OF_RANGE, TOO_LONG, TOO_SHORT}; +use {DateTime, FixedOffset, Weekday}; + +fn set_weekday_with_num_days_from_sunday(p: &mut Parsed, v: i64) -> ParseResult<()> { + p.set_weekday(match v { + 0 => Weekday::Sun, + 1 => Weekday::Mon, + 2 => Weekday::Tue, + 3 => Weekday::Wed, + 4 => Weekday::Thu, + 5 => Weekday::Fri, + 6 => Weekday::Sat, + _ => return Err(OUT_OF_RANGE), + }) +} + +fn set_weekday_with_number_from_monday(p: &mut Parsed, v: i64) -> ParseResult<()> { + p.set_weekday(match v { + 1 => Weekday::Mon, + 2 => Weekday::Tue, + 3 => Weekday::Wed, + 4 => Weekday::Thu, + 5 => Weekday::Fri, + 6 => Weekday::Sat, + 7 => Weekday::Sun, + _ => return Err(OUT_OF_RANGE), + }) +} + +fn parse_rfc2822<'a>(parsed: &mut Parsed, mut s: &'a str) -> ParseResult<(&'a str, ())> { + macro_rules! try_consume { + ($e:expr) => {{ + let (s_, v) = $e?; + s = s_; + v + }}; + } + + // an adapted RFC 2822 syntax from Section 3.3 and 4.3: + // + // date-time = [ day-of-week "," ] date 1*S time *S + // day-of-week = *S day-name *S + // day-name = "Mon" / "Tue" / "Wed" / "Thu" / "Fri" / "Sat" / "Sun" + // date = day month year + // day = *S 1*2DIGIT *S + // month = 1*S month-name 1*S + // month-name = "Jan" / "Feb" / "Mar" / "Apr" / "May" / "Jun" / + // "Jul" / "Aug" / "Sep" / "Oct" / "Nov" / "Dec" + // year = *S 2*DIGIT *S + // time = time-of-day 1*S zone + // time-of-day = hour ":" minute [ ":" second ] + // hour = *S 2DIGIT *S + // minute = *S 2DIGIT *S + // second = *S 2DIGIT *S + // zone = ( "+" / "-" ) 4DIGIT / + // "UT" / "GMT" / ; same as +0000 + // "EST" / "CST" / "MST" / "PST" / ; same as -0500 to -0800 + // "EDT" / "CDT" / "MDT" / "PDT" / ; same as -0400 to -0700 + // 1*(%d65-90 / %d97-122) ; same as -0000 + // + // some notes: + // + // - quoted characters can be in any mixture of lower and upper cases. + // + // - we do not recognize a folding white space (FWS) or comment (CFWS). + // for our purposes, instead, we accept any sequence of Unicode + // white space characters (denoted here to `S`). any actual RFC 2822 + // parser is expected to parse FWS and/or CFWS themselves and replace + // it with a single SP (`%x20`); this is legitimate. + // + // - two-digit year < 50 should be interpreted by adding 2000. + // two-digit year >= 50 or three-digit year should be interpreted + // by adding 1900. note that four-or-more-digit years less than 1000 + // are *never* affected by this rule. + // + // - mismatching day-of-week is always an error, which is consistent to + // Chrono's own rules. + // + // - zones can range from `-9959` to `+9959`, but `FixedOffset` does not + // support offsets larger than 24 hours. this is not *that* problematic + // since we do not directly go to a `DateTime` so one can recover + // the offset information from `Parsed` anyway. + + s = s.trim_left(); + + if let Ok((s_, weekday)) = scan::short_weekday(s) { + if !s_.starts_with(',') { + return Err(INVALID); + } + s = &s_[1..]; + parsed.set_weekday(weekday)?; + } + + s = s.trim_left(); + parsed.set_day(try_consume!(scan::number(s, 1, 2)))?; + s = scan::space(s)?; // mandatory + parsed.set_month(1 + i64::from(try_consume!(scan::short_month0(s))))?; + s = scan::space(s)?; // mandatory + + // distinguish two- and three-digit years from four-digit years + let prevlen = s.len(); + let mut year = try_consume!(scan::number(s, 2, usize::MAX)); + let yearlen = prevlen - s.len(); + match (yearlen, year) { + (2, 0...49) => { + year += 2000; + } // 47 -> 2047, 05 -> 2005 + (2, 50...99) => { + year += 1900; + } // 79 -> 1979 + (3, _) => { + year += 1900; + } // 112 -> 2012, 009 -> 1909 + (_, _) => {} // 1987 -> 1987, 0654 -> 0654 + } + parsed.set_year(year)?; + + s = scan::space(s)?; // mandatory + parsed.set_hour(try_consume!(scan::number(s, 2, 2)))?; + s = scan::char(s.trim_left(), b':')?.trim_left(); // *S ":" *S + parsed.set_minute(try_consume!(scan::number(s, 2, 2)))?; + if let Ok(s_) = scan::char(s.trim_left(), b':') { + // [ ":" *S 2DIGIT ] + parsed.set_second(try_consume!(scan::number(s_, 2, 2)))?; + } + + s = scan::space(s)?; // mandatory + if let Some(offset) = try_consume!(scan::timezone_offset_2822(s)) { + // only set the offset when it is definitely known (i.e. not `-0000`) + parsed.set_offset(i64::from(offset))?; + } + + Ok((s, ())) +} + +fn parse_rfc3339<'a>(parsed: &mut Parsed, mut s: &'a str) -> ParseResult<(&'a str, ())> { + macro_rules! try_consume { + ($e:expr) => {{ + let (s_, v) = $e?; + s = s_; + v + }}; + } + + // an adapted RFC 3339 syntax from Section 5.6: + // + // date-fullyear = 4DIGIT + // date-month = 2DIGIT ; 01-12 + // date-mday = 2DIGIT ; 01-28, 01-29, 01-30, 01-31 based on month/year + // time-hour = 2DIGIT ; 00-23 + // time-minute = 2DIGIT ; 00-59 + // time-second = 2DIGIT ; 00-58, 00-59, 00-60 based on leap second rules + // time-secfrac = "." 1*DIGIT + // time-numoffset = ("+" / "-") time-hour ":" time-minute + // time-offset = "Z" / time-numoffset + // partial-time = time-hour ":" time-minute ":" time-second [time-secfrac] + // full-date = date-fullyear "-" date-month "-" date-mday + // full-time = partial-time time-offset + // date-time = full-date "T" full-time + // + // some notes: + // + // - quoted characters can be in any mixture of lower and upper cases. + // + // - it may accept any number of fractional digits for seconds. + // for Chrono, this means that we should skip digits past first 9 digits. + // + // - unlike RFC 2822, the valid offset ranges from -23:59 to +23:59. + // note that this restriction is unique to RFC 3339 and not ISO 8601. + // since this is not a typical Chrono behavior, we check it earlier. + + parsed.set_year(try_consume!(scan::number(s, 4, 4)))?; + s = scan::char(s, b'-')?; + parsed.set_month(try_consume!(scan::number(s, 2, 2)))?; + s = scan::char(s, b'-')?; + parsed.set_day(try_consume!(scan::number(s, 2, 2)))?; + + s = match s.as_bytes().first() { + Some(&b't') | Some(&b'T') => &s[1..], + Some(_) => return Err(INVALID), + None => return Err(TOO_SHORT), + }; + + parsed.set_hour(try_consume!(scan::number(s, 2, 2)))?; + s = scan::char(s, b':')?; + parsed.set_minute(try_consume!(scan::number(s, 2, 2)))?; + s = scan::char(s, b':')?; + parsed.set_second(try_consume!(scan::number(s, 2, 2)))?; + if s.starts_with('.') { + let nanosecond = try_consume!(scan::nanosecond(&s[1..])); + parsed.set_nanosecond(nanosecond)?; + } + + let offset = try_consume!(scan::timezone_offset_zulu(s, |s| scan::char(s, b':'))); + if offset <= -86_400 || offset >= 86_400 { + return Err(OUT_OF_RANGE); + } + parsed.set_offset(i64::from(offset))?; + + Ok((s, ())) +} + +/// Tries to parse given string into `parsed` with given formatting items. +/// Returns `Ok` when the entire string has been parsed (otherwise `parsed` should not be used). +/// There should be no trailing string after parsing; +/// use a stray [`Item::Space`](./enum.Item.html#variant.Space) to trim whitespaces. +/// +/// This particular date and time parser is: +/// +/// - Greedy. It will consume the longest possible prefix. +/// For example, `April` is always consumed entirely when the long month name is requested; +/// it equally accepts `Apr`, but prefers the longer prefix in this case. +/// +/// - Padding-agnostic (for numeric items). +/// The [`Pad`](./enum.Pad.html) field is completely ignored, +/// so one can prepend any number of whitespace then any number of zeroes before numbers. +/// +/// - (Still) obeying the intrinsic parsing width. This allows, for example, parsing `HHMMSS`. +pub fn parse<'a, I, B>(parsed: &mut Parsed, s: &str, items: I) -> ParseResult<()> +where + I: Iterator<Item = B>, + B: Borrow<Item<'a>>, +{ + parse_internal(parsed, s, items).map(|_| ()).map_err(|(_s, e)| e) +} + +fn parse_internal<'a, 'b, I, B>( + parsed: &mut Parsed, + mut s: &'b str, + items: I, +) -> Result<&'b str, (&'b str, ParseError)> +where + I: Iterator<Item = B>, + B: Borrow<Item<'a>>, +{ + macro_rules! try_consume { + ($e:expr) => {{ + match $e { + Ok((s_, v)) => { + s = s_; + v + } + Err(e) => return Err((s, e)), + } + }}; + } + + for item in items { + match *item.borrow() { + Item::Literal(prefix) => { + if s.len() < prefix.len() { + return Err((s, TOO_SHORT)); + } + if !s.starts_with(prefix) { + return Err((s, INVALID)); + } + s = &s[prefix.len()..]; + } + + #[cfg(any(feature = "alloc", feature = "std", test))] + Item::OwnedLiteral(ref prefix) => { + if s.len() < prefix.len() { + return Err((s, TOO_SHORT)); + } + if !s.starts_with(&prefix[..]) { + return Err((s, INVALID)); + } + s = &s[prefix.len()..]; + } + + Item::Space(_) => { + s = s.trim_left(); + } + + #[cfg(any(feature = "alloc", feature = "std", test))] + Item::OwnedSpace(_) => { + s = s.trim_left(); + } + + Item::Numeric(ref spec, ref _pad) => { + use super::Numeric::*; + type Setter = fn(&mut Parsed, i64) -> ParseResult<()>; + + let (width, signed, set): (usize, bool, Setter) = match *spec { + Year => (4, true, Parsed::set_year), + YearDiv100 => (2, false, Parsed::set_year_div_100), + YearMod100 => (2, false, Parsed::set_year_mod_100), + IsoYear => (4, true, Parsed::set_isoyear), + IsoYearDiv100 => (2, false, Parsed::set_isoyear_div_100), + IsoYearMod100 => (2, false, Parsed::set_isoyear_mod_100), + Month => (2, false, Parsed::set_month), + Day => (2, false, Parsed::set_day), + WeekFromSun => (2, false, Parsed::set_week_from_sun), + WeekFromMon => (2, false, Parsed::set_week_from_mon), + IsoWeek => (2, false, Parsed::set_isoweek), + NumDaysFromSun => (1, false, set_weekday_with_num_days_from_sunday), + WeekdayFromMon => (1, false, set_weekday_with_number_from_monday), + Ordinal => (3, false, Parsed::set_ordinal), + Hour => (2, false, Parsed::set_hour), + Hour12 => (2, false, Parsed::set_hour12), + Minute => (2, false, Parsed::set_minute), + Second => (2, false, Parsed::set_second), + Nanosecond => (9, false, Parsed::set_nanosecond), + Timestamp => (usize::MAX, false, Parsed::set_timestamp), + + // for the future expansion + Internal(ref int) => match int._dummy {}, + }; + + s = s.trim_left(); + let v = if signed { + if s.starts_with('-') { + let v = try_consume!(scan::number(&s[1..], 1, usize::MAX)); + 0i64.checked_sub(v).ok_or((s, OUT_OF_RANGE))? + } else if s.starts_with('+') { + try_consume!(scan::number(&s[1..], 1, usize::MAX)) + } else { + // if there is no explicit sign, we respect the original `width` + try_consume!(scan::number(s, 1, width)) + } + } else { + try_consume!(scan::number(s, 1, width)) + }; + set(parsed, v).map_err(|e| (s, e))?; + } + + Item::Fixed(ref spec) => { + use super::Fixed::*; + + match spec { + &ShortMonthName => { + let month0 = try_consume!(scan::short_month0(s)); + parsed.set_month(i64::from(month0) + 1).map_err(|e| (s, e))?; + } + + &LongMonthName => { + let month0 = try_consume!(scan::short_or_long_month0(s)); + parsed.set_month(i64::from(month0) + 1).map_err(|e| (s, e))?; + } + + &ShortWeekdayName => { + let weekday = try_consume!(scan::short_weekday(s)); + parsed.set_weekday(weekday).map_err(|e| (s, e))?; + } + + &LongWeekdayName => { + let weekday = try_consume!(scan::short_or_long_weekday(s)); + parsed.set_weekday(weekday).map_err(|e| (s, e))?; + } + + &LowerAmPm | &UpperAmPm => { + if s.len() < 2 { + return Err((s, TOO_SHORT)); + } + let ampm = match (s.as_bytes()[0] | 32, s.as_bytes()[1] | 32) { + (b'a', b'm') => false, + (b'p', b'm') => true, + _ => return Err((s, INVALID)), + }; + parsed.set_ampm(ampm).map_err(|e| (s, e))?; + s = &s[2..]; + } + + &Nanosecond | &Nanosecond3 | &Nanosecond6 | &Nanosecond9 => { + if s.starts_with('.') { + let nano = try_consume!(scan::nanosecond(&s[1..])); + parsed.set_nanosecond(nano).map_err(|e| (s, e))?; + } + } + + &Internal(InternalFixed { val: InternalInternal::Nanosecond3NoDot }) => { + if s.len() < 3 { + return Err((s, TOO_SHORT)); + } + let nano = try_consume!(scan::nanosecond_fixed(s, 3)); + parsed.set_nanosecond(nano).map_err(|e| (s, e))?; + } + + &Internal(InternalFixed { val: InternalInternal::Nanosecond6NoDot }) => { + if s.len() < 6 { + return Err((s, TOO_SHORT)); + } + let nano = try_consume!(scan::nanosecond_fixed(s, 6)); + parsed.set_nanosecond(nano).map_err(|e| (s, e))?; + } + + &Internal(InternalFixed { val: InternalInternal::Nanosecond9NoDot }) => { + if s.len() < 9 { + return Err((s, TOO_SHORT)); + } + let nano = try_consume!(scan::nanosecond_fixed(s, 9)); + parsed.set_nanosecond(nano).map_err(|e| (s, e))?; + } + + &TimezoneName => { + try_consume!(scan::timezone_name_skip(s)); + } + + &TimezoneOffsetColon | &TimezoneOffset => { + let offset = try_consume!(scan::timezone_offset( + s.trim_left(), + scan::colon_or_space + )); + parsed.set_offset(i64::from(offset)).map_err(|e| (s, e))?; + } + + &TimezoneOffsetColonZ | &TimezoneOffsetZ => { + let offset = try_consume!(scan::timezone_offset_zulu( + s.trim_left(), + scan::colon_or_space + )); + parsed.set_offset(i64::from(offset)).map_err(|e| (s, e))?; + } + &Internal(InternalFixed { + val: InternalInternal::TimezoneOffsetPermissive, + }) => { + let offset = try_consume!(scan::timezone_offset_permissive( + s.trim_left(), + scan::colon_or_space + )); + parsed.set_offset(i64::from(offset)).map_err(|e| (s, e))?; + } + + &RFC2822 => try_consume!(parse_rfc2822(parsed, s)), + &RFC3339 => try_consume!(parse_rfc3339(parsed, s)), + } + } + + Item::Error => { + return Err((s, BAD_FORMAT)); + } + } + } + + // if there are trailling chars, it is an error + if !s.is_empty() { + Err((s, TOO_LONG)) + } else { + Ok(s) + } +} + +impl str::FromStr for DateTime<FixedOffset> { + type Err = ParseError; + + fn from_str(s: &str) -> ParseResult<DateTime<FixedOffset>> { + const DATE_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), + ]; + const TIME_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(""), + Item::Fixed(Fixed::TimezoneOffsetZ), + Item::Space(""), + ]; + + let mut parsed = Parsed::new(); + match parse_internal(&mut parsed, s, DATE_ITEMS.iter()) { + Err((remainder, e)) if e.0 == ParseErrorKind::TooLong => { + if remainder.starts_with('T') || remainder.starts_with(' ') { + parse(&mut parsed, &remainder[1..], TIME_ITEMS.iter())?; + } else { + Err(INVALID)?; + } + } + Err((_s, e)) => Err(e)?, + Ok(_) => Err(NOT_ENOUGH)?, + }; + parsed.to_datetime() + } +} + +#[cfg(test)] +#[test] +fn test_parse() { + use super::IMPOSSIBLE; + use super::*; + + // workaround for Rust issue #22255 + fn parse_all(s: &str, items: &[Item]) -> ParseResult<Parsed> { + let mut parsed = Parsed::new(); + parse(&mut parsed, s, items.iter())?; + Ok(parsed) + } + + macro_rules! check { + ($fmt:expr, $items:expr; $err:tt) => ( + assert_eq!(parse_all($fmt, &$items), Err($err)) + ); + ($fmt:expr, $items:expr; $($k:ident: $v:expr),*) => (#[allow(unused_mut)] { + let mut expected = Parsed::new(); + $(expected.$k = Some($v);)* + assert_eq!(parse_all($fmt, &$items), Ok(expected)) + }); + } + + // empty string + check!("", []; ); + check!(" ", []; TOO_LONG); + check!("a", []; TOO_LONG); + + // whitespaces + check!("", [sp!("")]; ); + check!(" ", [sp!("")]; ); + check!("\t", [sp!("")]; ); + check!(" \n\r \n", [sp!("")]; ); + check!("a", [sp!("")]; TOO_LONG); + + // literal + check!("", [lit!("a")]; TOO_SHORT); + check!(" ", [lit!("a")]; INVALID); + check!("a", [lit!("a")]; ); + check!("aa", [lit!("a")]; TOO_LONG); + check!("A", [lit!("a")]; INVALID); + check!("xy", [lit!("xy")]; ); + check!("xy", [lit!("x"), lit!("y")]; ); + check!("x y", [lit!("x"), lit!("y")]; INVALID); + check!("xy", [lit!("x"), sp!(""), lit!("y")]; ); + check!("x y", [lit!("x"), sp!(""), lit!("y")]; ); + + // numeric + check!("1987", [num!(Year)]; year: 1987); + check!("1987 ", [num!(Year)]; TOO_LONG); + check!("0x12", [num!(Year)]; TOO_LONG); // `0` is parsed + check!("x123", [num!(Year)]; INVALID); + check!("2015", [num!(Year)]; year: 2015); + check!("0000", [num!(Year)]; year: 0); + check!("9999", [num!(Year)]; year: 9999); + check!(" \t987", [num!(Year)]; year: 987); + check!("5", [num!(Year)]; year: 5); + check!("5\0", [num!(Year)]; TOO_LONG); + check!("\05", [num!(Year)]; INVALID); + check!("", [num!(Year)]; TOO_SHORT); + check!("12345", [num!(Year), lit!("5")]; year: 1234); + check!("12345", [nums!(Year), lit!("5")]; year: 1234); + check!("12345", [num0!(Year), lit!("5")]; year: 1234); + check!("12341234", [num!(Year), num!(Year)]; year: 1234); + check!("1234 1234", [num!(Year), num!(Year)]; year: 1234); + check!("1234 1235", [num!(Year), num!(Year)]; IMPOSSIBLE); + check!("1234 1234", [num!(Year), lit!("x"), num!(Year)]; INVALID); + check!("1234x1234", [num!(Year), lit!("x"), num!(Year)]; year: 1234); + check!("1234xx1234", [num!(Year), lit!("x"), num!(Year)]; INVALID); + check!("1234 x 1234", [num!(Year), lit!("x"), num!(Year)]; INVALID); + + // signed numeric + check!("-42", [num!(Year)]; year: -42); + check!("+42", [num!(Year)]; year: 42); + check!("-0042", [num!(Year)]; year: -42); + check!("+0042", [num!(Year)]; year: 42); + check!("-42195", [num!(Year)]; year: -42195); + check!("+42195", [num!(Year)]; year: 42195); + check!(" -42195", [num!(Year)]; year: -42195); + check!(" +42195", [num!(Year)]; year: 42195); + check!(" - 42", [num!(Year)]; INVALID); + check!(" + 42", [num!(Year)]; INVALID); + check!("-", [num!(Year)]; TOO_SHORT); + check!("+", [num!(Year)]; TOO_SHORT); + + // unsigned numeric + check!("345", [num!(Ordinal)]; ordinal: 345); + check!("+345", [num!(Ordinal)]; INVALID); + check!("-345", [num!(Ordinal)]; INVALID); + check!(" 345", [num!(Ordinal)]; ordinal: 345); + check!(" +345", [num!(Ordinal)]; INVALID); + check!(" -345", [num!(Ordinal)]; INVALID); + + // various numeric fields + check!("1234 5678", + [num!(Year), num!(IsoYear)]; + year: 1234, isoyear: 5678); + check!("12 34 56 78", + [num!(YearDiv100), num!(YearMod100), num!(IsoYearDiv100), num!(IsoYearMod100)]; + year_div_100: 12, year_mod_100: 34, isoyear_div_100: 56, isoyear_mod_100: 78); + check!("1 2 3 4 5 6", + [num!(Month), num!(Day), num!(WeekFromSun), num!(WeekFromMon), num!(IsoWeek), + num!(NumDaysFromSun)]; + month: 1, day: 2, week_from_sun: 3, week_from_mon: 4, isoweek: 5, weekday: Weekday::Sat); + check!("7 89 01", + [num!(WeekdayFromMon), num!(Ordinal), num!(Hour12)]; + weekday: Weekday::Sun, ordinal: 89, hour_mod_12: 1); + check!("23 45 6 78901234 567890123", + [num!(Hour), num!(Minute), num!(Second), num!(Nanosecond), num!(Timestamp)]; + hour_div_12: 1, hour_mod_12: 11, minute: 45, second: 6, nanosecond: 78_901_234, + timestamp: 567_890_123); + + // fixed: month and weekday names + check!("apr", [fix!(ShortMonthName)]; month: 4); + check!("Apr", [fix!(ShortMonthName)]; month: 4); + check!("APR", [fix!(ShortMonthName)]; month: 4); + check!("ApR", [fix!(ShortMonthName)]; month: 4); + check!("April", [fix!(ShortMonthName)]; TOO_LONG); // `Apr` is parsed + check!("A", [fix!(ShortMonthName)]; TOO_SHORT); + check!("Sol", [fix!(ShortMonthName)]; INVALID); + check!("Apr", [fix!(LongMonthName)]; month: 4); + check!("Apri", [fix!(LongMonthName)]; TOO_LONG); // `Apr` is parsed + check!("April", [fix!(LongMonthName)]; month: 4); + check!("Aprill", [fix!(LongMonthName)]; TOO_LONG); + check!("Aprill", [fix!(LongMonthName), lit!("l")]; month: 4); + check!("Aprl", [fix!(LongMonthName), lit!("l")]; month: 4); + check!("April", [fix!(LongMonthName), lit!("il")]; TOO_SHORT); // do not backtrack + check!("thu", [fix!(ShortWeekdayName)]; weekday: Weekday::Thu); + check!("Thu", [fix!(ShortWeekdayName)]; weekday: Weekday::Thu); + check!("THU", [fix!(ShortWeekdayName)]; weekday: Weekday::Thu); + check!("tHu", [fix!(ShortWeekdayName)]; weekday: Weekday::Thu); + check!("Thursday", [fix!(ShortWeekdayName)]; TOO_LONG); // `Thu` is parsed + check!("T", [fix!(ShortWeekdayName)]; TOO_SHORT); + check!("The", [fix!(ShortWeekdayName)]; INVALID); + check!("Nop", [fix!(ShortWeekdayName)]; INVALID); + check!("Thu", [fix!(LongWeekdayName)]; weekday: Weekday::Thu); + check!("Thur", [fix!(LongWeekdayName)]; TOO_LONG); // `Thu` is parsed + check!("Thurs", [fix!(LongWeekdayName)]; TOO_LONG); // ditto + check!("Thursday", [fix!(LongWeekdayName)]; weekday: Weekday::Thu); + check!("Thursdays", [fix!(LongWeekdayName)]; TOO_LONG); + check!("Thursdays", [fix!(LongWeekdayName), lit!("s")]; weekday: Weekday::Thu); + check!("Thus", [fix!(LongWeekdayName), lit!("s")]; weekday: Weekday::Thu); + check!("Thursday", [fix!(LongWeekdayName), lit!("rsday")]; TOO_SHORT); // do not backtrack + + // fixed: am/pm + check!("am", [fix!(LowerAmPm)]; hour_div_12: 0); + check!("pm", [fix!(LowerAmPm)]; hour_div_12: 1); + check!("AM", [fix!(LowerAmPm)]; hour_div_12: 0); + check!("PM", [fix!(LowerAmPm)]; hour_div_12: 1); + check!("am", [fix!(UpperAmPm)]; hour_div_12: 0); + check!("pm", [fix!(UpperAmPm)]; hour_div_12: 1); + check!("AM", [fix!(UpperAmPm)]; hour_div_12: 0); + check!("PM", [fix!(UpperAmPm)]; hour_div_12: 1); + check!("Am", [fix!(LowerAmPm)]; hour_div_12: 0); + check!(" Am", [fix!(LowerAmPm)]; INVALID); + check!("ame", [fix!(LowerAmPm)]; TOO_LONG); // `am` is parsed + check!("a", [fix!(LowerAmPm)]; TOO_SHORT); + check!("p", [fix!(LowerAmPm)]; TOO_SHORT); + check!("x", [fix!(LowerAmPm)]; TOO_SHORT); + check!("xx", [fix!(LowerAmPm)]; INVALID); + check!("", [fix!(LowerAmPm)]; TOO_SHORT); + + // fixed: dot plus nanoseconds + check!("", [fix!(Nanosecond)]; ); // no field set, but not an error + check!("4", [fix!(Nanosecond)]; TOO_LONG); // never consumes `4` + check!("4", [fix!(Nanosecond), num!(Second)]; second: 4); + check!(".0", [fix!(Nanosecond)]; nanosecond: 0); + check!(".4", [fix!(Nanosecond)]; nanosecond: 400_000_000); + check!(".42", [fix!(Nanosecond)]; nanosecond: 420_000_000); + check!(".421", [fix!(Nanosecond)]; nanosecond: 421_000_000); + check!(".42195", [fix!(Nanosecond)]; nanosecond: 421_950_000); + check!(".421950803", [fix!(Nanosecond)]; nanosecond: 421_950_803); + check!(".421950803547", [fix!(Nanosecond)]; nanosecond: 421_950_803); + check!(".000000003547", [fix!(Nanosecond)]; nanosecond: 3); + check!(".000000000547", [fix!(Nanosecond)]; nanosecond: 0); + check!(".", [fix!(Nanosecond)]; TOO_SHORT); + check!(".4x", [fix!(Nanosecond)]; TOO_LONG); + check!(". 4", [fix!(Nanosecond)]; INVALID); + check!(" .4", [fix!(Nanosecond)]; TOO_LONG); // no automatic trimming + + // fixed: nanoseconds without the dot + check!("", [internal_fix!(Nanosecond3NoDot)]; TOO_SHORT); + check!("0", [internal_fix!(Nanosecond3NoDot)]; TOO_SHORT); + check!("4", [internal_fix!(Nanosecond3NoDot)]; TOO_SHORT); + check!("42", [internal_fix!(Nanosecond3NoDot)]; TOO_SHORT); + check!("421", [internal_fix!(Nanosecond3NoDot)]; nanosecond: 421_000_000); + check!("42143", [internal_fix!(Nanosecond3NoDot), num!(Second)]; nanosecond: 421_000_000, second: 43); + check!("42195", [internal_fix!(Nanosecond3NoDot)]; TOO_LONG); + check!("4x", [internal_fix!(Nanosecond3NoDot)]; TOO_SHORT); + check!(" 4", [internal_fix!(Nanosecond3NoDot)]; INVALID); + check!(".421", [internal_fix!(Nanosecond3NoDot)]; INVALID); + + check!("", [internal_fix!(Nanosecond6NoDot)]; TOO_SHORT); + check!("0", [internal_fix!(Nanosecond6NoDot)]; TOO_SHORT); + check!("42195", [internal_fix!(Nanosecond6NoDot)]; TOO_SHORT); + check!("421950", [internal_fix!(Nanosecond6NoDot)]; nanosecond: 421_950_000); + check!("000003", [internal_fix!(Nanosecond6NoDot)]; nanosecond: 3000); + check!("000000", [internal_fix!(Nanosecond6NoDot)]; nanosecond: 0); + check!("4x", [internal_fix!(Nanosecond6NoDot)]; TOO_SHORT); + check!(" 4", [internal_fix!(Nanosecond6NoDot)]; INVALID); + check!(".42100", [internal_fix!(Nanosecond6NoDot)]; INVALID); + + check!("", [internal_fix!(Nanosecond9NoDot)]; TOO_SHORT); + check!("42195", [internal_fix!(Nanosecond9NoDot)]; TOO_SHORT); + check!("421950803", [internal_fix!(Nanosecond9NoDot)]; nanosecond: 421_950_803); + check!("000000003", [internal_fix!(Nanosecond9NoDot)]; nanosecond: 3); + check!("42195080354", [internal_fix!(Nanosecond9NoDot), num!(Second)]; nanosecond: 421_950_803, second: 54); // don't skip digits that come after the 9 + check!("421950803547", [internal_fix!(Nanosecond9NoDot)]; TOO_LONG); + check!("000000000", [internal_fix!(Nanosecond9NoDot)]; nanosecond: 0); + check!("00000000x", [internal_fix!(Nanosecond9NoDot)]; INVALID); + check!(" 4", [internal_fix!(Nanosecond9NoDot)]; INVALID); + check!(".42100000", [internal_fix!(Nanosecond9NoDot)]; INVALID); + + // fixed: timezone offsets + check!("+00:00", [fix!(TimezoneOffset)]; offset: 0); + check!("-00:00", [fix!(TimezoneOffset)]; offset: 0); + check!("+00:01", [fix!(TimezoneOffset)]; offset: 60); + check!("-00:01", [fix!(TimezoneOffset)]; offset: -60); + check!("+00:30", [fix!(TimezoneOffset)]; offset: 30 * 60); + check!("-00:30", [fix!(TimezoneOffset)]; offset: -30 * 60); + check!("+04:56", [fix!(TimezoneOffset)]; offset: 296 * 60); + check!("-04:56", [fix!(TimezoneOffset)]; offset: -296 * 60); + check!("+24:00", [fix!(TimezoneOffset)]; offset: 24 * 60 * 60); + check!("-24:00", [fix!(TimezoneOffset)]; offset: -24 * 60 * 60); + check!("+99:59", [fix!(TimezoneOffset)]; offset: (100 * 60 - 1) * 60); + check!("-99:59", [fix!(TimezoneOffset)]; offset: -(100 * 60 - 1) * 60); + check!("+00:59", [fix!(TimezoneOffset)]; offset: 59 * 60); + check!("+00:60", [fix!(TimezoneOffset)]; OUT_OF_RANGE); + check!("+00:99", [fix!(TimezoneOffset)]; OUT_OF_RANGE); + check!("#12:34", [fix!(TimezoneOffset)]; INVALID); + check!("12:34", [fix!(TimezoneOffset)]; INVALID); + check!("+12:34 ", [fix!(TimezoneOffset)]; TOO_LONG); + check!(" +12:34", [fix!(TimezoneOffset)]; offset: 754 * 60); + check!("\t -12:34", [fix!(TimezoneOffset)]; offset: -754 * 60); + check!("", [fix!(TimezoneOffset)]; TOO_SHORT); + check!("+", [fix!(TimezoneOffset)]; TOO_SHORT); + check!("+1", [fix!(TimezoneOffset)]; TOO_SHORT); + check!("+12", [fix!(TimezoneOffset)]; TOO_SHORT); + check!("+123", [fix!(TimezoneOffset)]; TOO_SHORT); + check!("+1234", [fix!(TimezoneOffset)]; offset: 754 * 60); + check!("+12345", [fix!(TimezoneOffset)]; TOO_LONG); + check!("+12345", [fix!(TimezoneOffset), num!(Day)]; offset: 754 * 60, day: 5); + check!("Z", [fix!(TimezoneOffset)]; INVALID); + check!("z", [fix!(TimezoneOffset)]; INVALID); + check!("Z", [fix!(TimezoneOffsetZ)]; offset: 0); + check!("z", [fix!(TimezoneOffsetZ)]; offset: 0); + check!("Y", [fix!(TimezoneOffsetZ)]; INVALID); + check!("Zulu", [fix!(TimezoneOffsetZ), lit!("ulu")]; offset: 0); + check!("zulu", [fix!(TimezoneOffsetZ), lit!("ulu")]; offset: 0); + check!("+1234ulu", [fix!(TimezoneOffsetZ), lit!("ulu")]; offset: 754 * 60); + check!("+12:34ulu", [fix!(TimezoneOffsetZ), lit!("ulu")]; offset: 754 * 60); + check!("Z", [internal_fix!(TimezoneOffsetPermissive)]; offset: 0); + check!("z", [internal_fix!(TimezoneOffsetPermissive)]; offset: 0); + check!("+12:00", [internal_fix!(TimezoneOffsetPermissive)]; offset: 12 * 60 * 60); + check!("+12", [internal_fix!(TimezoneOffsetPermissive)]; offset: 12 * 60 * 60); + check!("CEST 5", [fix!(TimezoneName), lit!(" "), num!(Day)]; day: 5); + + // some practical examples + check!("2015-02-04T14:37:05+09:00", + [num!(Year), lit!("-"), num!(Month), lit!("-"), num!(Day), lit!("T"), + num!(Hour), lit!(":"), num!(Minute), lit!(":"), num!(Second), fix!(TimezoneOffset)]; + year: 2015, month: 2, day: 4, hour_div_12: 1, hour_mod_12: 2, + minute: 37, second: 5, offset: 32400); + check!("20150204143705567", + [num!(Year), num!(Month), num!(Day), + num!(Hour), num!(Minute), num!(Second), internal_fix!(Nanosecond3NoDot)]; + year: 2015, month: 2, day: 4, hour_div_12: 1, hour_mod_12: 2, + minute: 37, second: 5, nanosecond: 567000000); + check!("Mon, 10 Jun 2013 09:32:37 GMT", + [fix!(ShortWeekdayName), lit!(","), sp!(" "), num!(Day), sp!(" "), + fix!(ShortMonthName), sp!(" "), num!(Year), sp!(" "), num!(Hour), lit!(":"), + num!(Minute), lit!(":"), num!(Second), sp!(" "), lit!("GMT")]; + year: 2013, month: 6, day: 10, weekday: Weekday::Mon, + hour_div_12: 0, hour_mod_12: 9, minute: 32, second: 37); + check!("Sun Aug 02 13:39:15 CEST 2020", + [fix!(ShortWeekdayName), sp!(" "), fix!(ShortMonthName), sp!(" "), + num!(Day), sp!(" "), num!(Hour), lit!(":"), num!(Minute), lit!(":"), + num!(Second), sp!(" "), fix!(TimezoneName), sp!(" "), num!(Year)]; + year: 2020, month: 8, day: 2, weekday: Weekday::Sun, + hour_div_12: 1, hour_mod_12: 1, minute: 39, second: 15); + check!("20060102150405", + [num!(Year), num!(Month), num!(Day), num!(Hour), num!(Minute), num!(Second)]; + year: 2006, month: 1, day: 2, hour_div_12: 1, hour_mod_12: 3, minute: 4, second: 5); + check!("3:14PM", + [num!(Hour12), lit!(":"), num!(Minute), fix!(LowerAmPm)]; + hour_div_12: 1, hour_mod_12: 3, minute: 14); + check!("12345678901234.56789", + [num!(Timestamp), lit!("."), num!(Nanosecond)]; + nanosecond: 56_789, timestamp: 12_345_678_901_234); + check!("12345678901234.56789", + [num!(Timestamp), fix!(Nanosecond)]; + nanosecond: 567_890_000, timestamp: 12_345_678_901_234); +} + +#[cfg(test)] +#[test] +fn test_rfc2822() { + use super::NOT_ENOUGH; + use super::*; + use offset::FixedOffset; + use DateTime; + + // Test data - (input, Ok(expected result after parse and format) or Err(error code)) + let testdates = [ + ("Tue, 20 Jan 2015 17:35:20 -0800", Ok("Tue, 20 Jan 2015 17:35:20 -0800")), // normal case + ("Fri, 2 Jan 2015 17:35:20 -0800", Ok("Fri, 02 Jan 2015 17:35:20 -0800")), // folding whitespace + ("Fri, 02 Jan 2015 17:35:20 -0800", Ok("Fri, 02 Jan 2015 17:35:20 -0800")), // leading zero + ("20 Jan 2015 17:35:20 -0800", Ok("Tue, 20 Jan 2015 17:35:20 -0800")), // no day of week + ("20 JAN 2015 17:35:20 -0800", Ok("Tue, 20 Jan 2015 17:35:20 -0800")), // upper case month + ("Tue, 20 Jan 2015 17:35 -0800", Ok("Tue, 20 Jan 2015 17:35:00 -0800")), // no second + ("11 Sep 2001 09:45:00 EST", Ok("Tue, 11 Sep 2001 09:45:00 -0500")), + ("30 Feb 2015 17:35:20 -0800", Err(OUT_OF_RANGE)), // bad day of month + ("Tue, 20 Jan 2015", Err(TOO_SHORT)), // omitted fields + ("Tue, 20 Avr 2015 17:35:20 -0800", Err(INVALID)), // bad month name + ("Tue, 20 Jan 2015 25:35:20 -0800", Err(OUT_OF_RANGE)), // bad hour + ("Tue, 20 Jan 2015 7:35:20 -0800", Err(INVALID)), // bad # of digits in hour + ("Tue, 20 Jan 2015 17:65:20 -0800", Err(OUT_OF_RANGE)), // bad minute + ("Tue, 20 Jan 2015 17:35:90 -0800", Err(OUT_OF_RANGE)), // bad second + ("Tue, 20 Jan 2015 17:35:20 -0890", Err(OUT_OF_RANGE)), // bad offset + ("6 Jun 1944 04:00:00Z", Err(INVALID)), // bad offset (zulu not allowed) + ("Tue, 20 Jan 2015 17:35:20 HAS", Err(NOT_ENOUGH)), // bad named time zone + ]; + + fn rfc2822_to_datetime(date: &str) -> ParseResult<DateTime<FixedOffset>> { + let mut parsed = Parsed::new(); + parse(&mut parsed, date, [Item::Fixed(Fixed::RFC2822)].iter())?; + parsed.to_datetime() + } + + fn fmt_rfc2822_datetime(dt: DateTime<FixedOffset>) -> String { + dt.format_with_items([Item::Fixed(Fixed::RFC2822)].iter()).to_string() + } + + // Test against test data above + for &(date, checkdate) in testdates.iter() { + let d = rfc2822_to_datetime(date); // parse a date + let dt = match d { + // did we get a value? + Ok(dt) => Ok(fmt_rfc2822_datetime(dt)), // yes, go on + Err(e) => Err(e), // otherwise keep an error for the comparison + }; + if dt != checkdate.map(|s| s.to_string()) { + // check for expected result + panic!( + "Date conversion failed for {}\nReceived: {:?}\nExpected: {:?}", + date, dt, checkdate + ); + } + } +} + +#[cfg(test)] +#[test] +fn parse_rfc850() { + use {TimeZone, Utc}; + + static RFC850_FMT: &'static str = "%A, %d-%b-%y %T GMT"; + + let dt_str = "Sunday, 06-Nov-94 08:49:37 GMT"; + let dt = Utc.ymd(1994, 11, 6).and_hms(8, 49, 37); + + // Check that the format is what we expect + assert_eq!(dt.format(RFC850_FMT).to_string(), dt_str); + + // Check that it parses correctly + assert_eq!(Ok(dt), Utc.datetime_from_str("Sunday, 06-Nov-94 08:49:37 GMT", RFC850_FMT)); + + // Check that the rest of the weekdays parse correctly (this test originally failed because + // Sunday parsed incorrectly). + let testdates = [ + (Utc.ymd(1994, 11, 7).and_hms(8, 49, 37), "Monday, 07-Nov-94 08:49:37 GMT"), + (Utc.ymd(1994, 11, 8).and_hms(8, 49, 37), "Tuesday, 08-Nov-94 08:49:37 GMT"), + (Utc.ymd(1994, 11, 9).and_hms(8, 49, 37), "Wednesday, 09-Nov-94 08:49:37 GMT"), + (Utc.ymd(1994, 11, 10).and_hms(8, 49, 37), "Thursday, 10-Nov-94 08:49:37 GMT"), + (Utc.ymd(1994, 11, 11).and_hms(8, 49, 37), "Friday, 11-Nov-94 08:49:37 GMT"), + (Utc.ymd(1994, 11, 12).and_hms(8, 49, 37), "Saturday, 12-Nov-94 08:49:37 GMT"), + ]; + + for val in &testdates { + assert_eq!(Ok(val.0), Utc.datetime_from_str(val.1, RFC850_FMT)); + } +} + +#[cfg(test)] +#[test] +fn test_rfc3339() { + use super::*; + use offset::FixedOffset; + use DateTime; + + // Test data - (input, Ok(expected result after parse and format) or Err(error code)) + let testdates = [ + ("2015-01-20T17:35:20-08:00", Ok("2015-01-20T17:35:20-08:00")), // normal case + ("1944-06-06T04:04:00Z", Ok("1944-06-06T04:04:00+00:00")), // D-day + ("2001-09-11T09:45:00-08:00", Ok("2001-09-11T09:45:00-08:00")), + ("2015-01-20T17:35:20.001-08:00", Ok("2015-01-20T17:35:20.001-08:00")), + ("2015-01-20T17:35:20.000031-08:00", Ok("2015-01-20T17:35:20.000031-08:00")), + ("2015-01-20T17:35:20.000000004-08:00", Ok("2015-01-20T17:35:20.000000004-08:00")), + ("2015-01-20T17:35:20.000000000452-08:00", Ok("2015-01-20T17:35:20-08:00")), // too small + ("2015-02-30T17:35:20-08:00", Err(OUT_OF_RANGE)), // bad day of month + ("2015-01-20T25:35:20-08:00", Err(OUT_OF_RANGE)), // bad hour + ("2015-01-20T17:65:20-08:00", Err(OUT_OF_RANGE)), // bad minute + ("2015-01-20T17:35:90-08:00", Err(OUT_OF_RANGE)), // bad second + ("2015-01-20T17:35:20-24:00", Err(OUT_OF_RANGE)), // bad offset + ]; + + fn rfc3339_to_datetime(date: &str) -> ParseResult<DateTime<FixedOffset>> { + let mut parsed = Parsed::new(); + parse(&mut parsed, date, [Item::Fixed(Fixed::RFC3339)].iter())?; + parsed.to_datetime() + } + + fn fmt_rfc3339_datetime(dt: DateTime<FixedOffset>) -> String { + dt.format_with_items([Item::Fixed(Fixed::RFC3339)].iter()).to_string() + } + + // Test against test data above + for &(date, checkdate) in testdates.iter() { + let d = rfc3339_to_datetime(date); // parse a date + let dt = match d { + // did we get a value? + Ok(dt) => Ok(fmt_rfc3339_datetime(dt)), // yes, go on + Err(e) => Err(e), // otherwise keep an error for the comparison + }; + if dt != checkdate.map(|s| s.to_string()) { + // check for expected result + panic!( + "Date conversion failed for {}\nReceived: {:?}\nExpected: {:?}", + date, dt, checkdate + ); + } + } +} |