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// 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
);
}
}
}