created `format::parse` module.
this new module encompasses John Nagle's original RFC 2822 and 3337 parsers, updated to fully compatible to the actual standard. the contributed `parse` module has been merged into it.
This commit is contained in:
Kang Seonghoon
parent
c7f132cca2
commit
6937470405
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@ -16,6 +16,4 @@ name = "chrono"
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[dependencies]
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time = "0.1.15"
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regex = "0.1.12"
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regex_macros = "0.1.6"
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@ -7,19 +7,18 @@
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*/
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use std::fmt;
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use std::usize;
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use std::error::Error;
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use {Datelike, Timelike};
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use Weekday;
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use div::{div_floor, mod_floor};
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use duration::Duration;
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use offset::Offset;
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use naive::date::NaiveDate;
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use naive::time::NaiveTime;
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pub use self::parsed::Parsed;
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pub use self::strftime::StrftimeItems;
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pub use self::parsed::Parsed;
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pub use self::parse::parse;
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/// Padding characters for numeric items.
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#[derive(Copy, Clone, PartialEq, Eq, Debug)]
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@ -134,6 +133,10 @@ pub enum Fixed {
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/// and `Z` can be either in upper case or in lower case.
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/// The offset is limited from `-24:00` to `+24:00`, which is same to `FixedOffset`'s range.
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TimezoneOffsetZ,
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/// RFC 2822 date and time syntax. Commonly used for email and MIME date and time.
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RFC2822,
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/// RFC 3339 & ISO 8601 date and time syntax.
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RFC3339,
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}
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/// A single formatting item. This is used for both formatting and parsing.
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@ -159,6 +162,73 @@ macro_rules! num0 { ($x:ident) => (Item::Numeric(Numeric::$x, Pad::Zero)) }
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macro_rules! nums { ($x:ident) => (Item::Numeric(Numeric::$x, Pad::Space)) }
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macro_rules! fix { ($x:ident) => (Item::Fixed(Fixed::$x)) }
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/// An error from the `parse` function.
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#[derive(Debug, Clone, PartialEq, Copy)]
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pub struct ParseError(ParseErrorKind);
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#[derive(Debug, Clone, PartialEq, Copy)]
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enum ParseErrorKind {
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/// Given field is out of permitted range.
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OutOfRange,
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/// There is no possible date and time value with given set of fields.
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///
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/// This does not include the out-of-range conditions, which are trivially invalid.
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/// It includes the case that there are one or more fields that are inconsistent to each other.
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Impossible,
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/// Given set of fields is not enough to make a requested date and time value.
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///
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/// Note that there *may* be a case that given fields constrain the possible values so much
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/// that there is a unique possible value. Chrono only tries to be correct for
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/// most useful sets of fields however, as such constraint solving can be expensive.
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NotEnough,
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/// The input string has some invalid character sequence for given formatting items.
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Invalid,
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/// The input string has been prematurely ended.
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TooShort,
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/// All formatting items have been read but there is a remaining input.
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TooLong,
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/// There was an error on the formatting string, or there were non-supported formating items.
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BadFormat,
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}
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/// Same to `Result<T, ParseError>`.
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pub type ParseResult<T> = Result<T, ParseError>;
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impl fmt::Display for ParseError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.description().fmt(f)
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}
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}
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impl Error for ParseError {
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fn description(&self) -> &str {
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match self.0 {
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ParseErrorKind::OutOfRange => "input is out of range",
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ParseErrorKind::Impossible => "no possible date and time matching input",
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ParseErrorKind::NotEnough => "input is not enough for unique date and time",
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ParseErrorKind::Invalid => "input contains invalid characters",
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ParseErrorKind::TooShort => "premature end of input",
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ParseErrorKind::TooLong => "trailing input",
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ParseErrorKind::BadFormat => "bad or unsupported format string",
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}
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}
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}
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// to be used in this module and submodules
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const OUT_OF_RANGE: ParseError = ParseError(ParseErrorKind::OutOfRange);
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const IMPOSSIBLE: ParseError = ParseError(ParseErrorKind::Impossible);
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const NOT_ENOUGH: ParseError = ParseError(ParseErrorKind::NotEnough);
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const INVALID: ParseError = ParseError(ParseErrorKind::Invalid);
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const TOO_SHORT: ParseError = ParseError(ParseErrorKind::TooShort);
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const TOO_LONG: ParseError = ParseError(ParseErrorKind::TooLong);
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const BAD_FORMAT: ParseError = ParseError(ParseErrorKind::BadFormat);
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/// Tries to format given arguments with given formatting items.
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/// Internally used by `DelayedFormat`.
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pub fn format<'a, I>(w: &mut fmt::Formatter, date: Option<&NaiveDate>, time: Option<&NaiveTime>,
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@ -228,18 +298,23 @@ pub fn format<'a, I>(w: &mut fmt::Formatter, date: Option<&NaiveDate>, time: Opt
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Item::Fixed(spec) => {
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use self::Fixed::*;
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/// Prints an offset from UTC in the format of `+HHMM` or `+HH:MM`.
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/// `Z` instead of `+00[:]00` is allowed when `allow_zulu` is true.
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fn write_local_minus_utc(w: &mut fmt::Formatter, off: Duration,
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allow_zulu: bool) -> fmt::Result {
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allow_zulu: bool, use_colon: bool) -> fmt::Result {
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let off = off.num_minutes();
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if !allow_zulu || off != 0 {
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let (sign, off) = if off < 0 {('-', -off)} else {('+', off)};
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write!(w, "{}{:02}{:02}", sign, off / 60, off % 60)
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if use_colon {
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write!(w, "{}{:02}:{:02}", sign, off / 60, off % 60)
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} else {
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write!(w, "{}{:02}{:02}", sign, off / 60, off % 60)
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}
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} else {
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write!(w, "Z")
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}
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}
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let ret = match spec {
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ShortMonthName =>
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date.map(|d| write!(w, "{}", SHORT_MONTHS[d.month0() as usize])),
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@ -258,9 +333,28 @@ pub fn format<'a, I>(w: &mut fmt::Formatter, date: Option<&NaiveDate>, time: Opt
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TimezoneName =>
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off.map(|&(ref name, _)| write!(w, "{}", *name)),
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TimezoneOffset =>
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off.map(|&(_, off)| write_local_minus_utc(w, off, false)),
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off.map(|&(_, off)| write_local_minus_utc(w, off, false, false)),
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TimezoneOffsetZ =>
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off.map(|&(_, off)| write_local_minus_utc(w, off, true)),
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off.map(|&(_, off)| write_local_minus_utc(w, off, true, false)),
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RFC2822 => // same to `%a, %e %b %Y %H:%M:%S %z`
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if let (Some(d), Some(t), Some(&(_, off))) = (date, time, off) {
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try!(write!(w, "{}, {:2} {} {:04} {:02}:{:02}:{:02} ",
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SHORT_WEEKDAYS[d.weekday().num_days_from_monday() as usize],
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d.day(), SHORT_MONTHS[d.month0() as usize], d.year(),
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t.hour(), t.minute(), t.second()));
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Some(write_local_minus_utc(w, off, false, false))
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} else {
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None
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},
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RFC3339 => // (almost) same to `%Y-%m-%dT%H:%M:%S.%f%z`
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if let (Some(d), Some(t), Some(&(_, off))) = (date, time, off) {
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// reuse `Debug` impls which already prints ISO 8601 format.
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// this is faster in this way.
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try!(write!(w, "{:?}T{:?}", d, t));
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Some(write_local_minus_utc(w, off, false, true))
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} else {
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None
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},
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};
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match ret {
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@ -276,215 +370,13 @@ pub fn format<'a, I>(w: &mut fmt::Formatter, date: Option<&NaiveDate>, time: Opt
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Ok(())
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}
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/// An error from the `parse` function.
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#[derive(Debug, Clone, PartialEq, Copy)]
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pub struct ParseError(ParseErrorKind);
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pub mod parsed;
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#[derive(Debug, Clone, PartialEq, Copy)]
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enum ParseErrorKind {
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/// Given field is out of permitted range.
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OutOfRange,
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// due to the size of parsing routines, they are in separate modules.
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mod scan;
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mod parse;
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/// There is no possible date and time value with given set of fields.
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///
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/// This does not include the out-of-range conditions, which are trivially invalid.
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/// It includes the case that there are one or more fields that are inconsistent to each other.
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Impossible,
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/// Given set of fields is not enough to make a requested date and time value.
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///
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/// Note that there *may* be a case that given fields constrain the possible values so much
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/// that there is a unique possible value. Chrono only tries to be correct for
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/// most useful sets of fields however, as such constraint solving can be expensive.
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NotEnough,
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/// The input string has some invalid character sequence for given formatting items.
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Invalid,
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/// The input string has been prematurely ended.
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TooShort,
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/// All formatting items have been read but there is a remaining input.
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TooLong,
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/// There was an error on the formatting string, or there were non-supported formating items.
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BadFormat,
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}
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/// Same to `Result<T, ParseError>`.
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pub type ParseResult<T> = Result<T, ParseError>;
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impl fmt::Display for ParseError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.description().fmt(f)
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}
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}
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impl Error for ParseError {
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fn description(&self) -> &str {
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match self.0 {
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ParseErrorKind::OutOfRange => "input is out of range",
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ParseErrorKind::Impossible => "no possible date and time matching input",
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ParseErrorKind::NotEnough => "input is not enough for unique date and time",
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ParseErrorKind::Invalid => "input contains invalid characters",
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ParseErrorKind::TooShort => "premature end of input",
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ParseErrorKind::TooLong => "trailing input",
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ParseErrorKind::BadFormat => "bad or unsupported format string",
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}
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}
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}
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// to be used in this module and submodules
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const OUT_OF_RANGE: ParseError = ParseError(ParseErrorKind::OutOfRange);
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const IMPOSSIBLE: ParseError = ParseError(ParseErrorKind::Impossible);
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const NOT_ENOUGH: ParseError = ParseError(ParseErrorKind::NotEnough);
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const INVALID: ParseError = ParseError(ParseErrorKind::Invalid);
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const TOO_SHORT: ParseError = ParseError(ParseErrorKind::TooShort);
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const TOO_LONG: ParseError = ParseError(ParseErrorKind::TooLong);
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const BAD_FORMAT: ParseError = ParseError(ParseErrorKind::BadFormat);
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/// Tries to parse given string into `parsed` with given formatting items.
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/// Returns `Ok` when the entire string has been parsed (otherwise `parsed` should not be used).
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/// There should be no trailing string after parsing; use a stray `Item::Space` to trim whitespaces.
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///
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/// This particular date and time parser is:
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///
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/// - Greedy. It will consume the longest possible prefix.
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/// For example, `April` is always consumed entirely when the long month name is requested;
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/// it equally accepts `Apr`, but prefers the longer prefix in this case.
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/// - Padding-agnostic (for numeric items). The `Pad` field is completely ignored,
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/// so one can prepend any number of whitespace then any number of zeroes before numbers.
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/// - (Still) obeying the intrinsic parsing width. This allows, for example, parsing `HHMMSS`.
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pub fn parse<'a, I>(parsed: &mut Parsed, mut s: &str, items: I) -> ParseResult<()>
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where I: Iterator<Item=Item<'a>> {
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macro_rules! try_consume {
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($e:expr) => ({ let (s_, v) = try!($e); s = s_; v })
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}
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for item in items {
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match item {
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Item::Literal(prefix) => {
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if s.len() < prefix.len() { return Err(TOO_SHORT); }
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if !s.starts_with(prefix) { return Err(INVALID); }
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s = &s[prefix.len()..];
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}
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Item::Space(_) => {
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s = s.trim_left();
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}
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Item::Numeric(spec, _pad) => {
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use self::Numeric::*;
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fn set_weekday_with_num_days_from_sunday(p: &mut Parsed,
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v: i64) -> ParseResult<()> {
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p.set_weekday(match v {
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0 => Weekday::Sun, 1 => Weekday::Mon, 2 => Weekday::Tue,
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3 => Weekday::Wed, 4 => Weekday::Thu, 5 => Weekday::Fri,
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6 => Weekday::Sat, _ => return Err(OUT_OF_RANGE)
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})
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}
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fn set_weekday_with_number_from_monday(p: &mut Parsed, v: i64) -> ParseResult<()> {
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p.set_weekday(match v {
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1 => Weekday::Mon, 2 => Weekday::Tue, 3 => Weekday::Wed,
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4 => Weekday::Thu, 5 => Weekday::Fri, 6 => Weekday::Sat,
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7 => Weekday::Sun, _ => return Err(OUT_OF_RANGE)
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})
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}
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let (width, frac, set): (usize, bool,
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fn(&mut Parsed, i64) -> ParseResult<()>) = match spec {
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Year => (4, false, Parsed::set_year),
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YearDiv100 => (2, false, Parsed::set_year_div_100),
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YearMod100 => (2, false, Parsed::set_year_mod_100),
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IsoYear => (4, false, Parsed::set_isoyear),
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IsoYearDiv100 => (2, false, Parsed::set_isoyear_div_100),
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IsoYearMod100 => (2, false, Parsed::set_isoyear_mod_100),
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Month => (2, false, Parsed::set_month),
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Day => (2, false, Parsed::set_day),
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WeekFromSun => (2, false, Parsed::set_week_from_sun),
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WeekFromMon => (2, false, Parsed::set_week_from_mon),
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IsoWeek => (2, false, Parsed::set_isoweek),
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NumDaysFromSun => (1, false, set_weekday_with_num_days_from_sunday),
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WeekdayFromMon => (1, false, set_weekday_with_number_from_monday),
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Ordinal => (3, false, Parsed::set_ordinal),
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Hour => (2, false, Parsed::set_hour),
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Hour12 => (2, false, Parsed::set_hour12),
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Minute => (2, false, Parsed::set_minute),
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Second => (2, false, Parsed::set_second),
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Nanosecond => (9, true, Parsed::set_nanosecond),
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Timestamp => (usize::MAX, false, Parsed::set_timestamp),
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};
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let v = try_consume!(scan::number(s.trim_left(), 1, width, frac));
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try!(set(parsed, v));
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}
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Item::Fixed(spec) => {
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use self::Fixed::*;
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match spec {
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ShortMonthName => {
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let month0 = try_consume!(scan::short_month0(s));
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try!(parsed.set_month(month0 as i64 + 1));
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}
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LongMonthName => {
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let month0 = try_consume!(scan::short_or_long_month0(s));
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try!(parsed.set_month(month0 as i64 + 1));
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}
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ShortWeekdayName => {
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let weekday = try_consume!(scan::short_weekday(s));
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try!(parsed.set_weekday(weekday));
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}
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LongWeekdayName => {
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let weekday = try_consume!(scan::short_or_long_weekday(s));
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try!(parsed.set_weekday(weekday));
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}
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LowerAmPm | UpperAmPm => {
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if s.len() < 2 { return Err(TOO_SHORT); }
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let ampm = match [s.as_bytes()[0] | 32, s.as_bytes()[1] | 32] {
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[b'a',b'm'] => false,
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[b'p',b'm'] => true,
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_ => return Err(INVALID)
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};
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try!(parsed.set_ampm(ampm));
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s = &s[2..];
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}
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TimezoneName => return Err(BAD_FORMAT),
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TimezoneOffset => {
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let offset = try_consume!(scan::timezone_offset(s.trim_left(),
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scan::colon_or_space));
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try!(parsed.set_offset(offset as i64));
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}
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TimezoneOffsetZ => {
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let offset = try_consume!(scan::timezone_offset_zulu(s.trim_left(),
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scan::colon_or_space));
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try!(parsed.set_offset(offset as i64));
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}
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}
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}
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Item::Error => {
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return Err(BAD_FORMAT);
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}
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}
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}
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// if there are trailling chars, it is an error
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if !s.is_empty() {
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Err(TOO_LONG)
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} else {
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Ok(())
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}
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}
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pub mod strftime;
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/// A *temporary* object which can be used as an argument to `format!` or others.
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/// This is normally constructed via `format` methods of each date and time type.
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|
|
@ -521,210 +413,3 @@ impl<'a, I: Iterator<Item=Item<'a>> + Clone> fmt::Display for DelayedFormat<'a,
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}
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}
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mod scan;
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pub mod parsed;
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pub mod strftime;
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|
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#[cfg(test)]
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#[test]
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fn test_parse() {
|
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// workaround for Rust issue #22255
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fn parse_all(s: &str, items: &[Item]) -> ParseResult<Parsed> {
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let mut parsed = Parsed::new();
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try!(parse(&mut parsed, s, items.iter().cloned()));
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Ok(parsed)
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}
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macro_rules! check {
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($fmt:expr, $items:expr; $err:expr) => (
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assert_eq!(parse_all($fmt, &$items), Err($err))
|
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);
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($fmt:expr, $items:expr; $($k:ident: $v:expr),*) => (
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assert_eq!(parse_all($fmt, &$items), Ok(Parsed { $($k: Some($v),)* ..Parsed::new() }))
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);
|
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}
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// empty string
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check!("", []; );
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check!(" ", []; TOO_LONG);
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check!("a", []; TOO_LONG);
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// 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_div_100: 19, year_mod_100: 87);
|
||||
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_div_100: 20, year_mod_100: 15);
|
||||
check!("0000", [num!(Year)]; year_div_100: 0, year_mod_100: 0);
|
||||
check!("9999", [num!(Year)]; year_div_100: 99, year_mod_100: 99);
|
||||
check!(" \t987", [num!(Year)]; year_div_100: 9, year_mod_100: 87);
|
||||
check!("5", [num!(Year)]; year_div_100: 0, year_mod_100: 5);
|
||||
check!("-42", [num!(Year)]; INVALID);
|
||||
check!("+42", [num!(Year)]; INVALID);
|
||||
check!("5\0", [num!(Year)]; TOO_LONG);
|
||||
check!("\05", [num!(Year)]; INVALID);
|
||||
check!("", [num!(Year)]; TOO_SHORT);
|
||||
check!("12345", [num!(Year), lit!("5")]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("12345", [nums!(Year), lit!("5")]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("12345", [num0!(Year), lit!("5")]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("12341234", [num!(Year), num!(Year)]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("1234 1234", [num!(Year), num!(Year)]; year_div_100: 12, year_mod_100: 34);
|
||||
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_div_100: 12, year_mod_100: 34);
|
||||
check!("1234xx1234", [num!(Year), lit!("x"), num!(Year)]; INVALID);
|
||||
check!("1234 x 1234", [num!(Year), lit!("x"), num!(Year)]; INVALID);
|
||||
|
||||
// various numeric fields
|
||||
check!("1234 5678",
|
||||
[num!(Year), num!(IsoYear)];
|
||||
year_div_100: 12, year_mod_100: 34, isoyear_div_100: 56, isoyear_mod_100: 78);
|
||||
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: 789_012_340,
|
||||
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: 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!("???", [fix!(TimezoneName)]; BAD_FORMAT); // not allowed
|
||||
|
||||
// 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_div_100: 20, year_mod_100: 15, month: 2, day: 4,
|
||||
hour_div_12: 1, hour_mod_12: 2, minute: 37, second: 5, offset: 32400);
|
||||
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_div_100: 20, year_mod_100: 13, month: 6, day: 10, weekday: Weekday::Mon,
|
||||
hour_div_12: 0, hour_mod_12: 9, minute: 32, second: 37);
|
||||
check!("20060102150405",
|
||||
[num!(Year), num!(Month), num!(Day), num!(Hour), num!(Minute), num!(Second)];
|
||||
year_div_100: 20, year_mod_100: 6, 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: 567_890_000, timestamp: 12_345_678_901_234);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,625 @@
|
|||
// This is a part of rust-chrono.
|
||||
// Copyright (c) 2015, Kang Seonghoon.
|
||||
// Portions copyright (c) 2015, John Nagle.
|
||||
// See README.md and LICENSE.txt for details.
|
||||
|
||||
/*!
|
||||
* Date and time parsing routines.
|
||||
*/
|
||||
|
||||
use std::usize;
|
||||
|
||||
use Weekday;
|
||||
|
||||
use super::scan;
|
||||
use super::{Parsed, ParseResult, Item};
|
||||
use super::{OUT_OF_RANGE, INVALID, TOO_SHORT, TOO_LONG, BAD_FORMAT};
|
||||
|
||||
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) = try!($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 to +0000
|
||||
// "EST" / "CST" / "MST" / "PST" / ; same to -0500 to -0800
|
||||
// "EDT" / "CDT" / "MDT" / "PDT" / ; same to -0400 to -0700
|
||||
// 1*(%d65-90 / %d97-122) ; same to -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.
|
||||
//
|
||||
// - zone of `-0000` and any unrecognized legacy time zones (including
|
||||
// *every* one-letter military time zones) are considered "missing",
|
||||
// in such that we don't actually know what time zone is being used.
|
||||
//
|
||||
// - 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..];
|
||||
try!(parsed.set_weekday(weekday));
|
||||
}
|
||||
|
||||
s = s.trim_left();
|
||||
try!(parsed.set_day(try_consume!(scan::number(s, 1, 2, false))));
|
||||
s = try!(scan::space(s)); // mandatory
|
||||
try!(parsed.set_month(1 + try_consume!(scan::short_month0(s)) as i64));
|
||||
s = try!(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, false));
|
||||
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
|
||||
}
|
||||
try!(parsed.set_year(year));
|
||||
|
||||
s = try!(scan::space(s)); // mandatory
|
||||
try!(parsed.set_hour(try_consume!(scan::number(s, 2, 2, false))));
|
||||
s = try!(scan::char(s.trim_left(), b':')).trim_left(); // *S ":" *S
|
||||
try!(parsed.set_minute(try_consume!(scan::number(s, 2, 2, false))));
|
||||
s = s.trim_left();
|
||||
if !s.is_empty() { // [ ":" *S 2DIGIT ]
|
||||
s = try!(scan::char(s, b':')).trim_left();
|
||||
try!(parsed.set_second(try_consume!(scan::number(s, 2, 2, false))));
|
||||
}
|
||||
|
||||
s = try!(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`)
|
||||
try!(parsed.set_offset(offset as i64));
|
||||
}
|
||||
|
||||
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) = try!($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.
|
||||
|
||||
try!(parsed.set_year(try_consume!(scan::number(s, 4, 4, false))));
|
||||
s = try!(scan::char(s, b'-'));
|
||||
try!(parsed.set_month(try_consume!(scan::number(s, 2, 2, false))));
|
||||
s = try!(scan::char(s, b'-'));
|
||||
try!(parsed.set_day(try_consume!(scan::number(s, 2, 2, false))));
|
||||
|
||||
s = match s.as_bytes().first() {
|
||||
Some(&b't') | Some(&b'T') => &s[1..],
|
||||
Some(_) => return Err(INVALID),
|
||||
None => return Err(TOO_SHORT),
|
||||
};
|
||||
|
||||
try!(parsed.set_hour(try_consume!(scan::number(s, 2, 2, false))));
|
||||
s = try!(scan::char(s, b':'));
|
||||
try!(parsed.set_minute(try_consume!(scan::number(s, 2, 2, false))));
|
||||
s = try!(scan::char(s, b':'));
|
||||
try!(parsed.set_second(try_consume!(scan::number(s, 2, 2, false))));
|
||||
if s.starts_with(".") {
|
||||
let nanosecond = try_consume!(scan::number(&s[1..], 1, 9, true));
|
||||
s = s.trim_left_matches(|c: char| '0' <= c && c <= '9');
|
||||
try!(parsed.set_nanosecond(nanosecond));
|
||||
}
|
||||
|
||||
let offset = try_consume!(scan::timezone_offset_zulu(s, |s| scan::char(s, b':')));
|
||||
if offset <= -86400 || offset >= 86400 { return Err(OUT_OF_RANGE); }
|
||||
try!(parsed.set_offset(offset as i64));
|
||||
|
||||
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` 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` 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>(parsed: &mut Parsed, mut s: &str, items: I) -> ParseResult<()>
|
||||
where I: Iterator<Item=Item<'a>> {
|
||||
macro_rules! try_consume {
|
||||
($e:expr) => ({ let (s_, v) = try!($e); s = s_; v })
|
||||
}
|
||||
|
||||
for item in items {
|
||||
match item {
|
||||
Item::Literal(prefix) => {
|
||||
if s.len() < prefix.len() { return Err(TOO_SHORT); }
|
||||
if !s.starts_with(prefix) { return Err(INVALID); }
|
||||
s = &s[prefix.len()..];
|
||||
}
|
||||
|
||||
Item::Space(_) => {
|
||||
s = s.trim_left();
|
||||
}
|
||||
|
||||
Item::Numeric(spec, _pad) => {
|
||||
use super::Numeric::*;
|
||||
|
||||
let (width, frac, set): (usize, bool,
|
||||
fn(&mut Parsed, i64) -> ParseResult<()>) = match spec {
|
||||
Year => (4, false, Parsed::set_year),
|
||||
YearDiv100 => (2, false, Parsed::set_year_div_100),
|
||||
YearMod100 => (2, false, Parsed::set_year_mod_100),
|
||||
IsoYear => (4, false, 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, true, Parsed::set_nanosecond),
|
||||
Timestamp => (usize::MAX, false, Parsed::set_timestamp),
|
||||
};
|
||||
|
||||
let v = try_consume!(scan::number(s.trim_left(), 1, width, frac));
|
||||
try!(set(parsed, v));
|
||||
}
|
||||
|
||||
Item::Fixed(spec) => {
|
||||
use super::Fixed::*;
|
||||
|
||||
match spec {
|
||||
ShortMonthName => {
|
||||
let month0 = try_consume!(scan::short_month0(s));
|
||||
try!(parsed.set_month(month0 as i64 + 1));
|
||||
}
|
||||
|
||||
LongMonthName => {
|
||||
let month0 = try_consume!(scan::short_or_long_month0(s));
|
||||
try!(parsed.set_month(month0 as i64 + 1));
|
||||
}
|
||||
|
||||
ShortWeekdayName => {
|
||||
let weekday = try_consume!(scan::short_weekday(s));
|
||||
try!(parsed.set_weekday(weekday));
|
||||
}
|
||||
|
||||
LongWeekdayName => {
|
||||
let weekday = try_consume!(scan::short_or_long_weekday(s));
|
||||
try!(parsed.set_weekday(weekday));
|
||||
}
|
||||
|
||||
LowerAmPm | UpperAmPm => {
|
||||
if s.len() < 2 { return Err(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(INVALID)
|
||||
};
|
||||
try!(parsed.set_ampm(ampm));
|
||||
s = &s[2..];
|
||||
}
|
||||
|
||||
TimezoneName => return Err(BAD_FORMAT),
|
||||
|
||||
TimezoneOffset => {
|
||||
let offset = try_consume!(scan::timezone_offset(s.trim_left(),
|
||||
scan::colon_or_space));
|
||||
try!(parsed.set_offset(offset as i64));
|
||||
}
|
||||
|
||||
TimezoneOffsetZ => {
|
||||
let offset = try_consume!(scan::timezone_offset_zulu(s.trim_left(),
|
||||
scan::colon_or_space));
|
||||
try!(parsed.set_offset(offset as i64));
|
||||
}
|
||||
|
||||
RFC2822 => try_consume!(parse_rfc2822(parsed, s)),
|
||||
RFC3339 => try_consume!(parse_rfc3339(parsed, s)),
|
||||
}
|
||||
}
|
||||
|
||||
Item::Error => {
|
||||
return Err(BAD_FORMAT);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// if there are trailling chars, it is an error
|
||||
if !s.is_empty() {
|
||||
Err(TOO_LONG)
|
||||
} else {
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
#[test]
|
||||
fn test_parse() {
|
||||
use super::*;
|
||||
use super::IMPOSSIBLE;
|
||||
|
||||
// workaround for Rust issue #22255
|
||||
fn parse_all(s: &str, items: &[Item]) -> ParseResult<Parsed> {
|
||||
let mut parsed = Parsed::new();
|
||||
try!(parse(&mut parsed, s, items.iter().cloned()));
|
||||
Ok(parsed)
|
||||
}
|
||||
|
||||
macro_rules! check {
|
||||
($fmt:expr, $items:expr; $err:expr) => (
|
||||
assert_eq!(parse_all($fmt, &$items), Err($err))
|
||||
);
|
||||
($fmt:expr, $items:expr; $($k:ident: $v:expr),*) => (
|
||||
assert_eq!(parse_all($fmt, &$items), Ok(Parsed { $($k: Some($v),)* ..Parsed::new() }))
|
||||
);
|
||||
}
|
||||
|
||||
// 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_div_100: 19, year_mod_100: 87);
|
||||
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_div_100: 20, year_mod_100: 15);
|
||||
check!("0000", [num!(Year)]; year_div_100: 0, year_mod_100: 0);
|
||||
check!("9999", [num!(Year)]; year_div_100: 99, year_mod_100: 99);
|
||||
check!(" \t987", [num!(Year)]; year_div_100: 9, year_mod_100: 87);
|
||||
check!("5", [num!(Year)]; year_div_100: 0, year_mod_100: 5);
|
||||
check!("-42", [num!(Year)]; INVALID);
|
||||
check!("+42", [num!(Year)]; INVALID);
|
||||
check!("5\0", [num!(Year)]; TOO_LONG);
|
||||
check!("\05", [num!(Year)]; INVALID);
|
||||
check!("", [num!(Year)]; TOO_SHORT);
|
||||
check!("12345", [num!(Year), lit!("5")]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("12345", [nums!(Year), lit!("5")]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("12345", [num0!(Year), lit!("5")]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("12341234", [num!(Year), num!(Year)]; year_div_100: 12, year_mod_100: 34);
|
||||
check!("1234 1234", [num!(Year), num!(Year)]; year_div_100: 12, year_mod_100: 34);
|
||||
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_div_100: 12, year_mod_100: 34);
|
||||
check!("1234xx1234", [num!(Year), lit!("x"), num!(Year)]; INVALID);
|
||||
check!("1234 x 1234", [num!(Year), lit!("x"), num!(Year)]; INVALID);
|
||||
|
||||
// various numeric fields
|
||||
check!("1234 5678",
|
||||
[num!(Year), num!(IsoYear)];
|
||||
year_div_100: 12, year_mod_100: 34, isoyear_div_100: 56, isoyear_mod_100: 78);
|
||||
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: 789_012_340,
|
||||
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: 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!("???", [fix!(TimezoneName)]; BAD_FORMAT); // not allowed
|
||||
|
||||
// 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_div_100: 20, year_mod_100: 15, month: 2, day: 4,
|
||||
hour_div_12: 1, hour_mod_12: 2, minute: 37, second: 5, offset: 32400);
|
||||
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_div_100: 20, year_mod_100: 13, month: 6, day: 10, weekday: Weekday::Mon,
|
||||
hour_div_12: 0, hour_mod_12: 9, minute: 32, second: 37);
|
||||
check!("20060102150405",
|
||||
[num!(Year), num!(Month), num!(Day), num!(Hour), num!(Minute), num!(Second)];
|
||||
year_div_100: 20, year_mod_100: 6, 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: 567_890_000, timestamp: 12_345_678_901_234);
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
#[test]
|
||||
fn test_rfc2822() {
|
||||
use datetime::DateTime;
|
||||
use offset::FixedOffset;
|
||||
use super::*;
|
||||
use super::NOT_ENOUGH;
|
||||
|
||||
// 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
|
||||
("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
|
||||
("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();
|
||||
try!(parse(&mut parsed, date, [Item::Fixed(Fixed::RFC2822)].iter().cloned()));
|
||||
parsed.to_datetime()
|
||||
}
|
||||
|
||||
fn fmt_rfc2822_datetime(dt: DateTime<FixedOffset>) -> String {
|
||||
dt.format_with_items([Item::Fixed(Fixed::RFC2822)].iter().cloned()).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 test_rfc3339() {
|
||||
use datetime::DateTime;
|
||||
use offset::FixedOffset;
|
||||
use super::*;
|
||||
|
||||
// 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();
|
||||
try!(parse(&mut parsed, date, [Item::Fixed(Fixed::RFC3339)].iter().cloned()));
|
||||
parsed.to_datetime()
|
||||
}
|
||||
|
||||
fn fmt_rfc3339_datetime(dt: DateTime<FixedOffset>) -> String {
|
||||
dt.format_with_items([Item::Fixed(Fixed::RFC3339)].iter().cloned()).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);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
|
|
@ -467,7 +467,10 @@ impl Parsed {
|
|||
let time = try!(parsed.to_naive_time());
|
||||
Ok(date.and_time(time))
|
||||
} else {
|
||||
Err(NOT_ENOUGH)
|
||||
// reproduce the previous error(s)
|
||||
try!(date);
|
||||
try!(time);
|
||||
unreachable!()
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -867,6 +870,11 @@ mod tests {
|
|||
assert_eq!(parse!(year_mod_100: 12, 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_div_100: 20, year_mod_100: 15, 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]
|
||||
|
|
|
|||
|
|
@ -130,6 +130,27 @@ pub fn short_or_long_weekday(s: &str) -> ParseResult<(&str, Weekday)> {
|
|||
Ok((s, weekday))
|
||||
}
|
||||
|
||||
/// Tries to consume exactly one given character.
|
||||
pub fn char(s: &str, c1: u8) -> ParseResult<&str> {
|
||||
match s.as_bytes().first() {
|
||||
Some(&c) if c == c1 => Ok(&s[1..]),
|
||||
Some(_) => Err(INVALID),
|
||||
None => Err(TOO_SHORT),
|
||||
}
|
||||
}
|
||||
|
||||
/// Tries to consume one or more whitespace.
|
||||
pub fn space(s: &str) -> ParseResult<&str> {
|
||||
let s_ = s.trim_left();
|
||||
if s_.len() < s.len() {
|
||||
Ok(s_)
|
||||
} else if s.is_empty() {
|
||||
Err(TOO_SHORT)
|
||||
} else {
|
||||
Err(INVALID)
|
||||
}
|
||||
}
|
||||
|
||||
/// Consumes any number (including zero) of colon or spaces.
|
||||
pub fn colon_or_space(s: &str) -> ParseResult<&str> {
|
||||
Ok(s.trim_left_matches(|c: char| c == ':' || c.is_whitespace()))
|
||||
|
|
@ -138,7 +159,7 @@ pub fn colon_or_space(s: &str) -> ParseResult<&str> {
|
|||
/// Tries to parse `[-+]\d\d` continued by `\d\d`. Return an offset in seconds if possible.
|
||||
///
|
||||
/// The additional `colon` may be used to parse a mandatory or optional `:`
|
||||
/// between hours and minutes, and should return either a new suffix or `None` when parsing fails.
|
||||
/// between hours and minutes, and should return either a new suffix or `Err` when parsing fails.
|
||||
pub fn timezone_offset<F>(mut s: &str, mut colon: F) -> ParseResult<(&str, i32)>
|
||||
where F: FnMut(&str) -> ParseResult<&str> {
|
||||
let negative = match s.as_bytes().first() {
|
||||
|
|
@ -182,3 +203,43 @@ pub fn timezone_offset_zulu<F>(s: &str, colon: F) -> ParseResult<(&str, i32)>
|
|||
}
|
||||
}
|
||||
|
||||
/// Same to `timezone_offset` but also allows for RFC 2822 legacy timezones.
|
||||
/// May return `None` which indicates an insufficient offset data (i.e. `-0000`).
|
||||
pub fn timezone_offset_2822(s: &str) -> ParseResult<(&str, Option<i32>)> {
|
||||
// tries to parse legacy time zone names
|
||||
let upto = s.as_bytes().iter().position(|&c| match c { b'a'...b'z' | b'A'...b'Z' => false,
|
||||
_ => true }).unwrap_or(s.len());
|
||||
if upto > 0 {
|
||||
let name = &s[..upto];
|
||||
let s = &s[upto..];
|
||||
if equals(name, "gmt") || equals(name, "ut") {
|
||||
Ok((s, Some(0)))
|
||||
} else if equals(name, "est") {
|
||||
Ok((s, Some(-5 * 3600)))
|
||||
} else if equals(name, "edt") {
|
||||
Ok((s, Some(-4 * 3600)))
|
||||
} else if equals(name, "cst") {
|
||||
Ok((s, Some(-6 * 3600)))
|
||||
} else if equals(name, "cdt") {
|
||||
Ok((s, Some(-5 * 3600)))
|
||||
} else if equals(name, "mst") {
|
||||
Ok((s, Some(-7 * 3600)))
|
||||
} else if equals(name, "mdt") {
|
||||
Ok((s, Some(-6 * 3600)))
|
||||
} else if equals(name, "pst") {
|
||||
Ok((s, Some(-8 * 3600)))
|
||||
} else if equals(name, "pdt") {
|
||||
Ok((s, Some(-7 * 3600)))
|
||||
} else {
|
||||
Ok((s, None)) // recommended by RFC 2822: consume but treat it as -0000
|
||||
}
|
||||
} else {
|
||||
let (s_, offset) = try!(timezone_offset(s, |s| Ok(s)));
|
||||
if offset == 0 && s.starts_with("-") { // -0000 is not same to +0000
|
||||
Ok((s_, None))
|
||||
} else {
|
||||
Ok((s_, Some(offset)))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
11
src/lib.rs
11
src/lib.rs
|
|
@ -218,11 +218,6 @@ Advanced offset handling is not yet supported (but is planned in 0.3).
|
|||
#![feature(core, collections, hash, std_misc)] // lib stability features as per RFC #507
|
||||
#![cfg_attr(test, feature(test))] // ditto
|
||||
#![deny(missing_docs)]
|
||||
// This is needed to allow compile-time regular expressions in this crate.
|
||||
#![feature(plugin)]
|
||||
#![plugin(regex_macros)]
|
||||
extern crate regex;
|
||||
|
||||
|
||||
extern crate "time" as stdtime;
|
||||
|
||||
|
|
@ -265,12 +260,6 @@ pub mod time;
|
|||
pub mod datetime;
|
||||
pub mod format;
|
||||
|
||||
/// Parsing functions for date/time strings.
|
||||
///
|
||||
/// Parsing functions are provided for RFC 2822 ("Tue, 20 Jan 2015 17:35:20 -0800")
|
||||
/// and RFC3339/ISO8601 ("2015-01-20T17:35:20.001-0800") date/time strings.
|
||||
pub mod parse;
|
||||
|
||||
/// The day of week (DOW).
|
||||
///
|
||||
/// The order of the days of week depends on the context.
|
||||
|
|
|
|||
335
src/parse.rs
335
src/parse.rs
|
|
@ -1,335 +0,0 @@
|
|||
use std::num::Int;
|
||||
use std::cmp;
|
||||
use ::{Offset};
|
||||
|
||||
//
|
||||
// parse.rs -- parsing for various standardized date and time string formats
|
||||
//
|
||||
// John Nagle
|
||||
// January, 2015
|
||||
//
|
||||
//
|
||||
// RFC2822 time/date stamp parsing
|
||||
//
|
||||
// Example: "Tue, 20 Jan 2015 17:35:20 -0800".
|
||||
// Common use case: email date/time.
|
||||
//
|
||||
// Date format specification, from RFC2822.
|
||||
//
|
||||
// date-time = [ day-of-week "," ] date FWS time [CFWS]
|
||||
//
|
||||
// day-of-week = ([FWS] day-name) / obs-day-of-week
|
||||
//
|
||||
// day-name = "Mon" / "Tue" / "Wed" / "Thu" /
|
||||
// "Fri" / "Sat" / "Sun"
|
||||
//
|
||||
// date = day month year
|
||||
//
|
||||
// year = 4*DIGIT / obs-year
|
||||
//
|
||||
// month = (FWS month-name FWS) / obs-month
|
||||
//
|
||||
// month-name = "Jan" / "Feb" / "Mar" / "Apr" /
|
||||
// "May" / "Jun" / "Jul" / "Aug" /
|
||||
// "Sep" / "Oct" / "Nov" / "Dec"
|
||||
//
|
||||
// day = ([FWS] 1*2DIGIT) / obs-day
|
||||
//
|
||||
// time = time-of-day FWS zone
|
||||
//
|
||||
// time-of-day = hour ":" minute [ ":" second ]
|
||||
//
|
||||
// hour = 2DIGIT / obs-hour
|
||||
//
|
||||
// minute = 2DIGIT / obs-minute
|
||||
//
|
||||
// second = 2DIGIT / obs-second
|
||||
//
|
||||
// zone = (( "+" / "-" ) 4DIGIT) / obs-zone
|
||||
//
|
||||
//
|
||||
// Obsolete forms
|
||||
//
|
||||
// obs-day-of-week = [CFWS] day-name [CFWS]
|
||||
//
|
||||
// obs-year = [CFWS] 2*DIGIT [CFWS]
|
||||
//
|
||||
// obs-month = CFWS month-name CFWS
|
||||
//
|
||||
// obs-day = [CFWS] 1*2DIGIT [CFWS]
|
||||
//
|
||||
// obs-hour = [CFWS] 2DIGIT [CFWS]
|
||||
//
|
||||
// obs-minute = [CFWS] 2DIGIT [CFWS]
|
||||
//
|
||||
// obs-second = [CFWS] 2DIGIT [CFWS]
|
||||
//
|
||||
// obs-zone = "UT" / "GMT" / ; Universal Time
|
||||
// ; North American UT
|
||||
// ; offsets
|
||||
// "EST" / "EDT" / ; Eastern: - 5/ - 4
|
||||
// "CST" / "CDT" / ; Central: - 6/ - 5
|
||||
// "MST" / "MDT" / ; Mountain: - 7/ - 6
|
||||
// "PST" / "PDT" / ; Pacific: - 8/ - 7
|
||||
//
|
||||
// %d65-73 / ; Military zones - "A"
|
||||
// %d75-90 / ; through "I" and "K"
|
||||
// %d97-105 / ; through "Z", both
|
||||
// %d107-122 ; upper and lower case
|
||||
//
|
||||
//
|
||||
// Per RFC2882, all the obsolete one-letter military time zones are interpreted as
|
||||
// +0000.
|
||||
//
|
||||
// The only feature not supported is that an offset of "-0000" should return a
|
||||
// naive date/time, not a time zone aware one. This returns a time zone aware
|
||||
// date/time object in all cases.
|
||||
//
|
||||
//
|
||||
/// Time zone offset in minutes, from string.
|
||||
/// Allowed input per RFC2822 above - numeric offset or named time zone
|
||||
fn offsetmins(s: &str) -> Option<i32> {
|
||||
let offsetre = regex!(r"^([+-])(\d\d)(\d\d)$"); // +0800 as 8 hour offset
|
||||
let offsetmatches = offsetre.captures(s); // match time zone
|
||||
match offsetmatches {
|
||||
Some(caps) => { // It looks like a numeric offset
|
||||
let sign = caps.at(1).unwrap(); // + or -
|
||||
let hh = caps.at(2).unwrap().parse::<i32>().unwrap(); // hours
|
||||
let mm = caps.at(3).unwrap().parse::<i32>().unwrap(); // minutes
|
||||
let signval = match sign {
|
||||
"+" => 1,
|
||||
"-" => -1,
|
||||
_ => return None // unreachable
|
||||
};
|
||||
if hh < -12 || hh > 12 || mm < 0 || mm > 59 { return None } // check offsets
|
||||
return Some(signval*(hh*60 + mm)) // return offset in minute
|
||||
}
|
||||
None => { // not numeric, try the named time zones
|
||||
return match s {
|
||||
"GMT"|"UT"|"Z"|"z" => Some(0), // prime meridian
|
||||
"EDT" => Some(-4*60), // obsolete forms
|
||||
"EST"|"CDT" => Some(-5*60), // rather US-centric in this old RFC.
|
||||
"CST"|"MDT" => Some(-6*60),
|
||||
"MST"|"PDT" => Some(-7*60),
|
||||
"PST" => Some(-8*60),
|
||||
_ => match s.len() { 1 => Some(0), _ => None } // obsolete single-letter miltary forms are treated as 0 per RFC2822
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
/// Makes a new `DateTime` with offset given a valid RFC2822 string.
|
||||
/// Example: "Tue, 20 Jan 2015 17:35:20 -0800"
|
||||
pub fn rfc2822_to_datetime(s: &str) -> Option<::DateTime<::FixedOffset>> {
|
||||
|
||||
// Match the date format. Case-insensitive, compile-time regex.
|
||||
let datere = regex!(r"^(?i)(?:Mon,|Tue,|Wed,|Thu,|Fri,|Sat,|Sun,)??\s*(\d+)\s+(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+(\d\d\d\d)\s+(\d+):(\d+):(\d+)\s*([+-]\d\d\d\d|[A-Z]+)$");
|
||||
let matches = datere.captures(s.trim()); // Pattern match the date
|
||||
let captures = match matches {
|
||||
Some(caps) => caps, // succeed
|
||||
None => return None // fail
|
||||
};
|
||||
// Unwrapping numeric fields is safe because we've matched the regular expression.
|
||||
let dd = captures.at(1).unwrap().parse::<u32>().unwrap(); // day of month
|
||||
// Month names are case-sensitive in RFC 2822, but we allow the obvious other forms.
|
||||
let mo = match captures.at(2).unwrap() { // month decode
|
||||
"Jan"|"JAN"|"jan" => 1,
|
||||
"Feb"|"FEB"|"feb" => 2,
|
||||
"Mar"|"MAR"|"mar" => 3,
|
||||
"Apr"|"APR"|"apr" => 4,
|
||||
"May"|"MAY"|"may" => 5,
|
||||
"Jun"|"JUN"|"jun" => 6,
|
||||
"Jul"|"JUL"|"jul" => 7,
|
||||
"Aug"|"AUG"|"aug" => 8,
|
||||
"Sep"|"SEP"|"sep" => 9,
|
||||
"Oct"|"OCT"|"oct" => 10,
|
||||
"Nov"|"NOV"|"nov" => 11,
|
||||
"Dec"|"DEC"|"dec" => 12,
|
||||
_ => return None
|
||||
};
|
||||
let yyyy = captures.at(3).unwrap().parse::<i32>().unwrap(); // chrono wants a signed year
|
||||
let hh = captures.at(4).unwrap().parse::<u32>().unwrap();
|
||||
let mm = captures.at(5).unwrap().parse::<u32>().unwrap(); // minute
|
||||
let ss = captures.at(6).unwrap().parse::<u32>().unwrap();
|
||||
let offsetstr = captures.at(7).unwrap(); // can be +0800 or a time zone name
|
||||
let offsetmm = match offsetmins(offsetstr) {
|
||||
Some(v) => v,
|
||||
None => return None
|
||||
};
|
||||
let tz = ::FixedOffset::east(offsetmm*60); // decode time zone offset
|
||||
// Pack numeric values into DateTime object, returning None if fail.
|
||||
let date = tz.ymd_opt(yyyy, mo, dd); // date or none
|
||||
match date { // check for invalid date
|
||||
::LocalResult::Single(d) => d.and_hms_opt(hh, mm, ss), // encode into DateTime
|
||||
_ => return None // date conversion failed
|
||||
}
|
||||
}
|
||||
|
||||
/// Formats a DateTime as an RF2822 string.
|
||||
/// This is primarily for debugging.
|
||||
pub fn fmt_rfc2822_datetime(dt: ::DateTime<::FixedOffset>) -> String {
|
||||
dt.format("%a, %e %b %Y %H:%M:%S %z").to_string() // inverse of parsing
|
||||
}
|
||||
|
||||
//
|
||||
// RFC3339 date parsing
|
||||
//
|
||||
// This is a subset of ISO 8601 date format.
|
||||
// Example: "2012-09-09T18:00:00-07:00"
|
||||
// Common use case: Atom feeds.
|
||||
//
|
||||
//
|
||||
// From RFC3339, "Date and Time on the Internet: Timestamps", 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
|
||||
//
|
||||
// NOTE: Per [ABNF] and ISO8601, the "T" and "Z" characters in this
|
||||
// syntax may alternatively be lower case "t" or "z" respectively.
|
||||
//
|
||||
// ISO 8601 defines date and time separated by "T".
|
||||
// Applications using this syntax may choose, for the sake of
|
||||
// readability, to specify a full-date and full-time separated by
|
||||
// (say) a space character.
|
||||
//
|
||||
|
||||
/// Parse a string with a RFC3339 date, time, and offset into a DateTime.
|
||||
/// This is the subset of ISO 8601 date and time strings most used on the Web.
|
||||
pub fn rfc3339_to_datetime(s: &str) -> Option<::DateTime<::FixedOffset>> {
|
||||
let datere = regex!(r"^(?i)(\d\d\d\d)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)(\.\d+)??([+-]\d\d\d\d|[A-Z]+)$"); // format regex
|
||||
let matches = datere.captures(s.trim()); // Pattern match the date
|
||||
let captures = match matches {
|
||||
Some(caps) => caps, // succeed
|
||||
None => return None // fail
|
||||
};
|
||||
// Unwrapping numeric fields is safe because we've matched the regular expression.
|
||||
let yyyy = captures.at(1).unwrap().parse::<i32>().unwrap(); // chrono wants a signed year
|
||||
let mo = captures.at(2).unwrap().parse::<u32>().unwrap(); // month of year
|
||||
let dd = captures.at(3).unwrap().parse::<u32>().unwrap(); // day of month
|
||||
let hh = captures.at(4).unwrap().parse::<u32>().unwrap(); // hour
|
||||
let mm = captures.at(5).unwrap().parse::<u32>().unwrap(); // minute
|
||||
let ss = captures.at(6).unwrap().parse::<u32>().unwrap(); // second
|
||||
let ns = match captures.at(7) { // fractional seconds present?
|
||||
Some(fractstr) => parsensfract(fractstr), // parse as nanoseconds
|
||||
None => 0 // no fraction
|
||||
};
|
||||
let offsetstr = captures.at(8).unwrap(); // time zone offset, numeric
|
||||
let offsetmm = match offsetmins(offsetstr) { // also accepts named time zones, not required.
|
||||
Some(v) => v,
|
||||
None => return None
|
||||
};
|
||||
let tz = ::FixedOffset::east(offsetmm*60); // decode time zone offset
|
||||
// Pack numeric values into DateTime object, returning None if fail.
|
||||
let date = tz.ymd_opt(yyyy, mo, dd); // date or none
|
||||
match date { // check for invalid date
|
||||
::LocalResult::Single(d) => d.and_hms_nano_opt(hh, mm, ss, ns), // encode into DateTime
|
||||
_ => return None // date conversion failed
|
||||
}
|
||||
}
|
||||
|
||||
/// Parse ".NNN" into nanoseconds.
|
||||
/// Assumes input has already been checked for ".NNN" format.
|
||||
fn parsensfract(s: &str) -> u32 {
|
||||
let sdigits = &s[1..]; // trim off leading "."
|
||||
let sdigits9 = &sdigits[0..(cmp::min(sdigits.len(),9))]; // truncate at 9 digits after "."
|
||||
let v = sdigits9.parse::<u32>().unwrap(); // digits as u32 (will fit)
|
||||
let vl = 9-sdigits9.len(); // power of 10 for scaling
|
||||
let scale = Int::pow(10,vl); // scale factor to get to
|
||||
//panic!("parsens: s: {} sdigits9: {} v: {} scale: {} result: {}", s, sdigits9 , v, scale, v*scale); // ***TEMP***
|
||||
v*scale // as nanoseconds
|
||||
}
|
||||
|
||||
/// Formats a DateTime as an RFC 3339/ISO8601 date, with 9 digits of nanoseconds.
|
||||
/// This is the inverse operation of rfc3339 parsing.
|
||||
pub fn fmt_rfc3339_datetime(dt: ::DateTime<::FixedOffset>) -> String {
|
||||
dt.format("%Y-%m-%dT%H:%M:%S.%f%z").to_string() // inverse of parsing
|
||||
}
|
||||
|
||||
|
||||
//
|
||||
// Unit tests
|
||||
//
|
||||
#[test]
|
||||
/// Test RFC2822 parser.
|
||||
fn testrfc2822parser() {
|
||||
// Test data - [input, expected result after parse and format]
|
||||
let testdates = [
|
||||
["Tue, 20 Jan 2015 17:35:20 -0800", "Tue, 20 Jan 2015 17:35:20 -0800"], // normal case
|
||||
["20 Jan 2015 17:35:20 -0800", "Tue, 20 Jan 2015 17:35:20 -0800"], // no day of week
|
||||
["20 JAN 2015 17:35:20 -0800", "Tue, 20 Jan 2015 17:35:20 -0800"], // upper case month allowed
|
||||
["6 Jun 1944 04:00:00Z","Tue, 6 Jun 1944 04:00:00 +0000"], // D-day
|
||||
["11 Sep 2001 9:45:00 EST", "Tue, 11 Sep 2001 09:45:00 -0500"],
|
||||
["30 Feb 2015 17:35:20 -0800", ""], // bad day of month
|
||||
["Tue, 20 Avr 2015 17:35:20 -0800", ""],// bad month name
|
||||
["Tue, 20 Jan 2015 25:35:20 -0800",""], // bad hour
|
||||
["Tue, 20 Jan 2015 17:65:20 -0800",""], // bad minute
|
||||
["Tue, 20 Jan 2015 17:35:90 -0800",""], // bad second
|
||||
["Tue, 20 Jan 2015 17:35:20 -1800",""], // bad offset
|
||||
["Tue, 20 Jan 2015 17:35:20 HAS",""] // bad named time zone
|
||||
];
|
||||
// Test against test data above
|
||||
for testdate in testdates.iter() {
|
||||
let date = testdate[0]; // input
|
||||
let checkdate = testdate[1]; // expected result or ""
|
||||
let d = rfc2822_to_datetime(date); // parse a date
|
||||
let dt = match d { // did we get a value?
|
||||
Some(dt) => dt, // yes, go on
|
||||
None => if checkdate != "" { panic!("Failed to convert date {}", date)} else { continue },
|
||||
};
|
||||
// let mut s = String::new();
|
||||
let s = fmt_rfc2822_datetime(dt); // convert date/time back to string
|
||||
if s != checkdate { // check for expected result
|
||||
panic!("Date conversion failed for {}\nReceived: {}\nExpected: {}",date, s, checkdate);
|
||||
}
|
||||
};
|
||||
}
|
||||
#[test]
|
||||
/// Test RFC3339/ISO8601 parser.
|
||||
fn testrfc3339parser() {
|
||||
// Test data - [input, expected result after parse and format]
|
||||
let testdates = [
|
||||
["2015-01-20T17:35:20-0800", "2015-01-20T17:35:20.000000000-0800"], // normal case
|
||||
["1944-06-06T04:04:00Z", "1944-06-06T04:04:00.000000000+0000"], // D-day
|
||||
["2001-09-11T09:45:00-0800", "2001-09-11T09:45:00.000000000-0800"],
|
||||
["2015-01-20T17:35:20.001-0800", "2015-01-20T17:35:20.001000000-0800"], // milliseconds
|
||||
["2015-01-20T17:35:20.000031-0800", "2015-01-20T17:35:20.000031000-0800"], // microseconds
|
||||
["2015-01-20T17:35:20.000000004-0800", "2015-01-20T17:35:20.000000004-0800"], // nanoseconds
|
||||
["2015-01-20T17:35:20.000000000452-0800", "2015-01-20T17:35:20.000000000-0800"], // picoseconds (too small)
|
||||
["2015-02-30T17:35:20-0800", ""], // bad day of month
|
||||
["2015-01-20T25:35:20-0800", ""], // bad hour
|
||||
["2015-01-20T17:65:20-0800", ""], // bad minute
|
||||
["2015-01-20T17:35:90-0800", ""], // bad second
|
||||
["2015-01-20T17:35:20-1800", ""], // bad offset
|
||||
];
|
||||
// Test against test data above
|
||||
for testdate in testdates.iter() {
|
||||
let date = testdate[0]; // input
|
||||
let checkdate = testdate[1]; // expected result or ""
|
||||
let d = rfc3339_to_datetime(date); // parse a date
|
||||
let dt = match d { // did we get a value?
|
||||
Some(dt) => dt, // yes, go on
|
||||
None => if checkdate != "" { panic!("Failed to convert date {}", date)} else { continue },
|
||||
};
|
||||
// let mut s = String::new();
|
||||
let s = fmt_rfc3339_datetime(dt); // convert date/time back to string
|
||||
if s != checkdate { // check for expected result
|
||||
panic!("Date conversion failed for {}\nReceived: {}\nExpected: {}",date, s, checkdate);
|
||||
}
|
||||
};
|
||||
}
|
||||
Loading…
Reference in New Issue