Moved `chrono::naive:📅:internals` into its own file.
This commit is contained in:
Kang Seonghoon
parent
c06bc01f0b
commit
4f51ab0281
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@ -392,6 +392,8 @@ pub mod naive {
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//! (e.g. [`TimeZone`](../offset/trait.TimeZone.html)),
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//! but can be also used for the simpler date and time handling.
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mod internals;
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// avoid using them directly even in the crate itself
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#[path = "date.rs"] mod date_;
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#[path = "time.rs"] mod time_;
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@ -14,7 +14,7 @@ use naive::{NaiveTime, NaiveDateTime};
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use format::{Item, Numeric, Pad};
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use format::{parse, Parsed, ParseError, ParseResult, DelayedFormat, StrftimeItems};
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use self::internals::{DateImpl, Of, Mdf, YearFlags};
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use super::internals::{self, DateImpl, Of, Mdf, YearFlags};
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const MAX_YEAR: i32 = internals::MAX_YEAR;
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const MIN_YEAR: i32 = internals::MIN_YEAR;
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@ -2060,778 +2060,3 @@ mod tests {
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}
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}
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/// The internal implementation of the calendar and ordinal date.
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///
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/// The current implementation is optimized for determining year, month, day and day of week.
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/// 4-bit `YearFlags` map to one of 14 possible classes of year in the Gregorian calendar,
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/// which are included in every packed `NaiveDate` instance.
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/// The conversion between the packed calendar date (`Mdf`) and the ordinal date (`Of`) is
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/// based on the moderately-sized lookup table (~1.5KB)
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/// and the packed representation is chosen for the efficient lookup.
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/// Every internal data structure does not validate its input,
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/// but the conversion keeps the valid value valid and the invalid value invalid
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/// so that the user-facing `NaiveDate` can validate the input as late as possible.
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#[allow(dead_code)] // some internal methods have been left for consistency
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mod internals {
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use std::{i32, fmt};
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use num::traits::FromPrimitive;
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use Weekday;
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use div::{div_rem, mod_floor};
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/// The internal date representation. This also includes the packed `Mdf` value.
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pub type DateImpl = i32;
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pub const MAX_YEAR: DateImpl = i32::MAX >> 13;
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pub const MIN_YEAR: DateImpl = i32::MIN >> 13;
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/// The year flags (aka the dominical letter).
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///
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/// There are 14 possible classes of year in the Gregorian calendar:
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/// common and leap years starting with Monday through Sunday.
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/// The `YearFlags` stores this information into 4 bits `abbb`,
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/// where `a` is `1` for the common year (simplifies the `Of` validation)
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/// and `bbb` is a non-zero `Weekday` (mapping `Mon` to 7) of the last day in the past year
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/// (simplifies the day of week calculation from the 1-based ordinal).
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#[derive(PartialEq, Eq, Copy, Clone)]
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pub struct YearFlags(pub u8);
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pub const A: YearFlags = YearFlags(0o15); pub const AG: YearFlags = YearFlags(0o05);
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pub const B: YearFlags = YearFlags(0o14); pub const BA: YearFlags = YearFlags(0o04);
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pub const C: YearFlags = YearFlags(0o13); pub const CB: YearFlags = YearFlags(0o03);
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pub const D: YearFlags = YearFlags(0o12); pub const DC: YearFlags = YearFlags(0o02);
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pub const E: YearFlags = YearFlags(0o11); pub const ED: YearFlags = YearFlags(0o01);
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pub const F: YearFlags = YearFlags(0o17); pub const FE: YearFlags = YearFlags(0o07);
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pub const G: YearFlags = YearFlags(0o16); pub const GF: YearFlags = YearFlags(0o06);
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static YEAR_TO_FLAGS: [YearFlags; 400] = [
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BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F,
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ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B,
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AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E,
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DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A,
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GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, // 100
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C, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A,
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GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D,
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CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G,
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FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C,
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BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, // 200
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E, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C,
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BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F,
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ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B,
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AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E,
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DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, // 300
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G, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E,
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DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A,
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GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D,
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CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G,
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FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, // 400
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];
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static YEAR_DELTAS: [u8; 401] = [
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0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5,
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5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10,
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10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15,
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15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20,
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20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, // 100
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25, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29,
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29, 30, 30, 30, 30, 31, 31, 31, 31, 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34,
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34, 35, 35, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39,
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39, 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43, 44, 44, 44,
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44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, 48, 48, 48, 48, 49, 49, 49, // 200
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49, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, 52, 52, 52, 52, 53, 53, 53,
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53, 54, 54, 54, 54, 55, 55, 55, 55, 56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58,
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58, 59, 59, 59, 59, 60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63,
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63, 64, 64, 64, 64, 65, 65, 65, 65, 66, 66, 66, 66, 67, 67, 67, 67, 68, 68, 68,
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68, 69, 69, 69, 69, 70, 70, 70, 70, 71, 71, 71, 71, 72, 72, 72, 72, 73, 73, 73, // 300
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73, 73, 73, 73, 73, 74, 74, 74, 74, 75, 75, 75, 75, 76, 76, 76, 76, 77, 77, 77,
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77, 78, 78, 78, 78, 79, 79, 79, 79, 80, 80, 80, 80, 81, 81, 81, 81, 82, 82, 82,
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82, 83, 83, 83, 83, 84, 84, 84, 84, 85, 85, 85, 85, 86, 86, 86, 86, 87, 87, 87,
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87, 88, 88, 88, 88, 89, 89, 89, 89, 90, 90, 90, 90, 91, 91, 91, 91, 92, 92, 92,
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92, 93, 93, 93, 93, 94, 94, 94, 94, 95, 95, 95, 95, 96, 96, 96, 96, 97, 97, 97, 97 // 400+1
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];
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pub fn cycle_to_yo(cycle: u32) -> (u32, u32) {
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let (mut year_mod_400, mut ordinal0) = div_rem(cycle, 365);
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let delta = YEAR_DELTAS[year_mod_400 as usize] as u32;
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if ordinal0 < delta {
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year_mod_400 -= 1;
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ordinal0 += 365 - YEAR_DELTAS[year_mod_400 as usize] as u32;
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} else {
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ordinal0 -= delta;
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}
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(year_mod_400, ordinal0 + 1)
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}
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pub fn yo_to_cycle(year_mod_400: u32, ordinal: u32) -> u32 {
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year_mod_400 * 365 + YEAR_DELTAS[year_mod_400 as usize] as u32 + ordinal - 1
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}
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impl YearFlags {
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#[inline]
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pub fn from_year(year: i32) -> YearFlags {
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let year = mod_floor(year, 400);
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YearFlags::from_year_mod_400(year)
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}
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#[inline]
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pub fn from_year_mod_400(year: i32) -> YearFlags {
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YEAR_TO_FLAGS[year as usize]
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}
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#[inline]
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pub fn ndays(&self) -> u32 {
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let YearFlags(flags) = *self;
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366 - (flags >> 3) as u32
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}
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#[inline]
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pub fn isoweek_delta(&self) -> u32 {
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let YearFlags(flags) = *self;
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let mut delta = flags as u32 & 0b111;
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if delta < 3 { delta += 7; }
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delta
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}
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#[inline]
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pub fn nisoweeks(&self) -> u32 {
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let YearFlags(flags) = *self;
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52 + ((0b00000100_00000110 >> flags as usize) & 1)
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}
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}
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impl fmt::Debug for YearFlags {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let YearFlags(flags) = *self;
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match flags {
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0o15 => "A".fmt(f), 0o05 => "AG".fmt(f),
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0o14 => "B".fmt(f), 0o04 => "BA".fmt(f),
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0o13 => "C".fmt(f), 0o03 => "CB".fmt(f),
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0o12 => "D".fmt(f), 0o02 => "DC".fmt(f),
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0o11 => "E".fmt(f), 0o01 => "ED".fmt(f),
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0o10 => "F?".fmt(f), 0o00 => "FE?".fmt(f), // non-canonical
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0o17 => "F".fmt(f), 0o07 => "FE".fmt(f),
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0o16 => "G".fmt(f), 0o06 => "GF".fmt(f),
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_ => write!(f, "YearFlags({})", flags),
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}
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}
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}
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pub const MIN_OL: u32 = 1 << 1;
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pub const MAX_OL: u32 = 366 << 1; // larger than the non-leap last day `(365 << 1) | 1`
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pub const MIN_MDL: u32 = (1 << 6) | (1 << 1);
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pub const MAX_MDL: u32 = (12 << 6) | (31 << 1) | 1;
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const XX: i8 = -128;
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static MDL_TO_OL: [i8; (MAX_MDL as usize + 1)] = [
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XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
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XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
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XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
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XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, // 0
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XX, XX, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, // 1
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XX, XX, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
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66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
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66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
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66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, XX, XX, XX, XX, XX, // 2
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XX, XX, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
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72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
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72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
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72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, // 3
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XX, XX, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
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74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
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74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
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74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, XX, XX, // 4
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XX, XX, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
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78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
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78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
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78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, // 5
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XX, XX, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
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80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
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80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
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80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, XX, XX, // 6
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XX, XX, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
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84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
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84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
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84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, // 7
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XX, XX, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
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86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
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86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
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86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, // 8
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XX, XX, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
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88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
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88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
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88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, XX, XX, // 9
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XX, XX, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
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92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
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92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
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92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, // 10
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XX, XX, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
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94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
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94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
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94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, XX, XX, // 11
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XX, XX, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
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98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
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98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
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98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, // 12
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];
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static OL_TO_MDL: [u8; (MAX_OL as usize + 1)] = [
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0, 0, // 0
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, // 1
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66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
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66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
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66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
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66, 66, 66, 66, 66, 66, 66, 66, 66, // 2
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74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
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72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
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72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
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72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, // 3
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76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
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74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
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74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
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74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, // 4
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80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
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78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
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78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
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78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, // 5
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82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
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80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
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80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
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80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, // 6
|
||||
86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, // 7
|
||||
88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, // 8
|
||||
90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, // 9
|
||||
94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, // 10
|
||||
96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, // 11
|
||||
100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98, // 12
|
||||
];
|
||||
|
||||
/// Ordinal (day of year) and year flags: `(ordinal << 4) | flags`.
|
||||
///
|
||||
/// The whole bits except for the least 3 bits are referred as `Ol` (ordinal and leap flag),
|
||||
/// which is an index to the `OL_TO_MDL` lookup table.
|
||||
#[derive(PartialEq, PartialOrd, Copy, Clone)]
|
||||
pub struct Of(pub u32);
|
||||
|
||||
impl Of {
|
||||
#[inline]
|
||||
fn clamp_ordinal(ordinal: u32) -> u32 {
|
||||
if ordinal > 366 {0} else {ordinal}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn new(ordinal: u32, YearFlags(flags): YearFlags) -> Of {
|
||||
let ordinal = Of::clamp_ordinal(ordinal);
|
||||
Of((ordinal << 4) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn from_mdf(Mdf(mdf): Mdf) -> Of {
|
||||
let mdl = mdf >> 3;
|
||||
match MDL_TO_OL.get(mdl as usize) {
|
||||
Some(&v) => Of(mdf.wrapping_sub((v as i32 as u32 & 0x3ff) << 3)),
|
||||
None => Of(0)
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn valid(&self) -> bool {
|
||||
let Of(of) = *self;
|
||||
let ol = of >> 3;
|
||||
MIN_OL <= ol && ol <= MAX_OL
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn ordinal(&self) -> u32 {
|
||||
let Of(of) = *self;
|
||||
of >> 4
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_ordinal(&self, ordinal: u32) -> Of {
|
||||
let ordinal = Of::clamp_ordinal(ordinal);
|
||||
let Of(of) = *self;
|
||||
Of((of & 0b1111) | (ordinal << 4))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn flags(&self) -> YearFlags {
|
||||
let Of(of) = *self;
|
||||
YearFlags((of & 0b1111) as u8)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_flags(&self, YearFlags(flags): YearFlags) -> Of {
|
||||
let Of(of) = *self;
|
||||
Of((of & !0b1111) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn weekday(&self) -> Weekday {
|
||||
let Of(of) = *self;
|
||||
Weekday::from_u32(((of >> 4) + (of & 0b111)) % 7).unwrap()
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn isoweekdate_raw(&self) -> (u32, Weekday) {
|
||||
// week ordinal = ordinal + delta
|
||||
let Of(of) = *self;
|
||||
let weekord = (of >> 4).wrapping_add(self.flags().isoweek_delta());
|
||||
(weekord / 7, Weekday::from_u32(weekord % 7).unwrap())
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn to_mdf(&self) -> Mdf {
|
||||
Mdf::from_of(*self)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn succ(&self) -> Of {
|
||||
let Of(of) = *self;
|
||||
Of(of + (1 << 4))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn pred(&self) -> Of {
|
||||
let Of(of) = *self;
|
||||
Of(of - (1 << 4))
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Debug for Of {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let Of(of) = *self;
|
||||
write!(f, "Of(({} << 4) | {:#04o} /*{:?}*/)",
|
||||
of >> 4, of & 0b1111, YearFlags((of & 0b1111) as u8))
|
||||
}
|
||||
}
|
||||
|
||||
/// Month, day of month and year flags: `(month << 9) | (day << 4) | flags`
|
||||
///
|
||||
/// The whole bits except for the least 3 bits are referred as `Mdl`
|
||||
/// (month, day of month and leap flag),
|
||||
/// which is an index to the `MDL_TO_OL` lookup table.
|
||||
#[derive(PartialEq, PartialOrd, Copy, Clone)]
|
||||
pub struct Mdf(pub u32);
|
||||
|
||||
impl Mdf {
|
||||
#[inline]
|
||||
fn clamp_month(month: u32) -> u32 {
|
||||
if month > 12 {0} else {month}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
fn clamp_day(day: u32) -> u32 {
|
||||
if day > 31 {0} else {day}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn new(month: u32, day: u32, YearFlags(flags): YearFlags) -> Mdf {
|
||||
let month = Mdf::clamp_month(month);
|
||||
let day = Mdf::clamp_day(day);
|
||||
Mdf((month << 9) | (day << 4) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn from_of(Of(of): Of) -> Mdf {
|
||||
let ol = of >> 3;
|
||||
match OL_TO_MDL.get(ol as usize) {
|
||||
Some(&v) => Mdf(of + ((v as u32) << 3)),
|
||||
None => Mdf(0)
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn valid(&self) -> bool {
|
||||
let Mdf(mdf) = *self;
|
||||
let mdl = mdf >> 3;
|
||||
match MDL_TO_OL.get(mdl as usize) {
|
||||
Some(&v) => v >= 0,
|
||||
None => false
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn month(&self) -> u32 {
|
||||
let Mdf(mdf) = *self;
|
||||
mdf >> 9
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_month(&self, month: u32) -> Mdf {
|
||||
let month = Mdf::clamp_month(month);
|
||||
let Mdf(mdf) = *self;
|
||||
Mdf((mdf & 0b11111_1111) | (month << 9))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn day(&self) -> u32 {
|
||||
let Mdf(mdf) = *self;
|
||||
(mdf >> 4) & 0b11111
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_day(&self, day: u32) -> Mdf {
|
||||
let day = Mdf::clamp_day(day);
|
||||
let Mdf(mdf) = *self;
|
||||
Mdf((mdf & !0b11111_0000) | (day << 4))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn flags(&self) -> YearFlags {
|
||||
let Mdf(mdf) = *self;
|
||||
YearFlags((mdf & 0b1111) as u8)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_flags(&self, YearFlags(flags): YearFlags) -> Mdf {
|
||||
let Mdf(mdf) = *self;
|
||||
Mdf((mdf & !0b1111) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn to_of(&self) -> Of {
|
||||
Of::from_mdf(*self)
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Debug for Mdf {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let Mdf(mdf) = *self;
|
||||
write!(f, "Mdf(({} << 9) | ({} << 4) | {:#04o} /*{:?}*/)",
|
||||
mdf >> 9, (mdf >> 4) & 0b11111, mdf & 0b1111, YearFlags((mdf & 0b1111) as u8))
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
#[cfg(bench)] extern crate test;
|
||||
|
||||
use Weekday;
|
||||
use super::{Of, Mdf};
|
||||
use super::{YearFlags, A, B, C, D, E, F, G, AG, BA, CB, DC, ED, FE, GF};
|
||||
use num::iter::range_inclusive;
|
||||
use std::u32;
|
||||
|
||||
const NONLEAP_FLAGS: [YearFlags; 7] = [A, B, C, D, E, F, G];
|
||||
const LEAP_FLAGS: [YearFlags; 7] = [AG, BA, CB, DC, ED, FE, GF];
|
||||
const FLAGS: [YearFlags; 14] = [A, B, C, D, E, F, G, AG, BA, CB, DC, ED, FE, GF];
|
||||
|
||||
#[test]
|
||||
fn test_year_flags_ndays_from_year() {
|
||||
assert_eq!(YearFlags::from_year(2014).ndays(), 365);
|
||||
assert_eq!(YearFlags::from_year(2012).ndays(), 366);
|
||||
assert_eq!(YearFlags::from_year(2000).ndays(), 366);
|
||||
assert_eq!(YearFlags::from_year(1900).ndays(), 365);
|
||||
assert_eq!(YearFlags::from_year(1600).ndays(), 366);
|
||||
assert_eq!(YearFlags::from_year( 1).ndays(), 365);
|
||||
assert_eq!(YearFlags::from_year( 0).ndays(), 366); // 1 BCE (proleptic Gregorian)
|
||||
assert_eq!(YearFlags::from_year( -1).ndays(), 365); // 2 BCE
|
||||
assert_eq!(YearFlags::from_year( -4).ndays(), 366); // 5 BCE
|
||||
assert_eq!(YearFlags::from_year( -99).ndays(), 365); // 100 BCE
|
||||
assert_eq!(YearFlags::from_year(-100).ndays(), 365); // 101 BCE
|
||||
assert_eq!(YearFlags::from_year(-399).ndays(), 365); // 400 BCE
|
||||
assert_eq!(YearFlags::from_year(-400).ndays(), 366); // 401 BCE
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_year_flags_nisoweeks() {
|
||||
assert_eq!(A.nisoweeks(), 52);
|
||||
assert_eq!(B.nisoweeks(), 52);
|
||||
assert_eq!(C.nisoweeks(), 52);
|
||||
assert_eq!(D.nisoweeks(), 53);
|
||||
assert_eq!(E.nisoweeks(), 52);
|
||||
assert_eq!(F.nisoweeks(), 52);
|
||||
assert_eq!(G.nisoweeks(), 52);
|
||||
assert_eq!(AG.nisoweeks(), 52);
|
||||
assert_eq!(BA.nisoweeks(), 52);
|
||||
assert_eq!(CB.nisoweeks(), 52);
|
||||
assert_eq!(DC.nisoweeks(), 53);
|
||||
assert_eq!(ED.nisoweeks(), 53);
|
||||
assert_eq!(FE.nisoweeks(), 52);
|
||||
assert_eq!(GF.nisoweeks(), 52);
|
||||
}
|
||||
|
||||
#[cfg(bench)]
|
||||
#[bench]
|
||||
fn bench_year_flags_from_year(bh: &mut test::Bencher) {
|
||||
bh.iter(|| {
|
||||
for year in -999i32..1000 {
|
||||
YearFlags::from_year(year);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of() {
|
||||
fn check(expected: bool, flags: YearFlags, ordinal1: u32, ordinal2: u32) {
|
||||
for ordinal in range_inclusive(ordinal1, ordinal2) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
assert!(of.valid() == expected,
|
||||
"ordinal {} = {:?} should be {} for dominical year {:?}",
|
||||
ordinal, of, if expected {"valid"} else {"invalid"}, flags);
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0);
|
||||
check(true, flags, 1, 365);
|
||||
check(false, flags, 366, 1024);
|
||||
check(false, flags, u32::MAX, u32::MAX);
|
||||
}
|
||||
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0);
|
||||
check(true, flags, 1, 366);
|
||||
check(false, flags, 367, 1024);
|
||||
check(false, flags, u32::MAX, u32::MAX);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_valid() {
|
||||
fn check(expected: bool, flags: YearFlags, month1: u32, day1: u32,
|
||||
month2: u32, day2: u32) {
|
||||
for month in range_inclusive(month1, month2) {
|
||||
for day in range_inclusive(day1, day2) {
|
||||
let mdf = Mdf::new(month, day, flags);
|
||||
assert!(mdf.valid() == expected,
|
||||
"month {} day {} = {:?} should be {} for dominical year {:?}",
|
||||
month, day, mdf, if expected {"valid"} else {"invalid"}, flags);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0, 0, 1024);
|
||||
check(false, flags, 0, 0, 16, 0);
|
||||
check(true, flags, 1, 1, 1, 31); check(false, flags, 1, 32, 1, 1024);
|
||||
check(true, flags, 2, 1, 2, 28); check(false, flags, 2, 29, 2, 1024);
|
||||
check(true, flags, 3, 1, 3, 31); check(false, flags, 3, 32, 3, 1024);
|
||||
check(true, flags, 4, 1, 4, 30); check(false, flags, 4, 31, 4, 1024);
|
||||
check(true, flags, 5, 1, 5, 31); check(false, flags, 5, 32, 5, 1024);
|
||||
check(true, flags, 6, 1, 6, 30); check(false, flags, 6, 31, 6, 1024);
|
||||
check(true, flags, 7, 1, 7, 31); check(false, flags, 7, 32, 7, 1024);
|
||||
check(true, flags, 8, 1, 8, 31); check(false, flags, 8, 32, 8, 1024);
|
||||
check(true, flags, 9, 1, 9, 30); check(false, flags, 9, 31, 9, 1024);
|
||||
check(true, flags, 10, 1, 10, 31); check(false, flags, 10, 32, 10, 1024);
|
||||
check(true, flags, 11, 1, 11, 30); check(false, flags, 11, 31, 11, 1024);
|
||||
check(true, flags, 12, 1, 12, 31); check(false, flags, 12, 32, 12, 1024);
|
||||
check(false, flags, 13, 0, 16, 1024);
|
||||
check(false, flags, u32::MAX, 0, u32::MAX, 1024);
|
||||
check(false, flags, 0, u32::MAX, 16, u32::MAX);
|
||||
check(false, flags, u32::MAX, u32::MAX, u32::MAX, u32::MAX);
|
||||
}
|
||||
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0, 0, 1024);
|
||||
check(false, flags, 0, 0, 16, 0);
|
||||
check(true, flags, 1, 1, 1, 31); check(false, flags, 1, 32, 1, 1024);
|
||||
check(true, flags, 2, 1, 2, 29); check(false, flags, 2, 30, 2, 1024);
|
||||
check(true, flags, 3, 1, 3, 31); check(false, flags, 3, 32, 3, 1024);
|
||||
check(true, flags, 4, 1, 4, 30); check(false, flags, 4, 31, 4, 1024);
|
||||
check(true, flags, 5, 1, 5, 31); check(false, flags, 5, 32, 5, 1024);
|
||||
check(true, flags, 6, 1, 6, 30); check(false, flags, 6, 31, 6, 1024);
|
||||
check(true, flags, 7, 1, 7, 31); check(false, flags, 7, 32, 7, 1024);
|
||||
check(true, flags, 8, 1, 8, 31); check(false, flags, 8, 32, 8, 1024);
|
||||
check(true, flags, 9, 1, 9, 30); check(false, flags, 9, 31, 9, 1024);
|
||||
check(true, flags, 10, 1, 10, 31); check(false, flags, 10, 32, 10, 1024);
|
||||
check(true, flags, 11, 1, 11, 30); check(false, flags, 11, 31, 11, 1024);
|
||||
check(true, flags, 12, 1, 12, 31); check(false, flags, 12, 32, 12, 1024);
|
||||
check(false, flags, 13, 0, 16, 1024);
|
||||
check(false, flags, u32::MAX, 0, u32::MAX, 1024);
|
||||
check(false, flags, 0, u32::MAX, 16, u32::MAX);
|
||||
check(false, flags, u32::MAX, u32::MAX, u32::MAX, u32::MAX);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_fields() {
|
||||
for &flags in FLAGS.iter() {
|
||||
for ordinal in range_inclusive(1u32, 366) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
if of.valid() {
|
||||
assert_eq!(of.ordinal(), ordinal);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_with_fields() {
|
||||
fn check(flags: YearFlags, ordinal: u32) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
|
||||
for ordinal in range_inclusive(0u32, 1024) {
|
||||
let of = of.with_ordinal(ordinal);
|
||||
assert_eq!(of.valid(), Of::new(ordinal, flags).valid());
|
||||
if of.valid() {
|
||||
assert_eq!(of.ordinal(), ordinal);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(flags, 1);
|
||||
check(flags, 365);
|
||||
}
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(flags, 1);
|
||||
check(flags, 366);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_weekday() {
|
||||
assert_eq!(Of::new(1, A).weekday(), Weekday::Sun);
|
||||
assert_eq!(Of::new(1, B).weekday(), Weekday::Sat);
|
||||
assert_eq!(Of::new(1, C).weekday(), Weekday::Fri);
|
||||
assert_eq!(Of::new(1, D).weekday(), Weekday::Thu);
|
||||
assert_eq!(Of::new(1, E).weekday(), Weekday::Wed);
|
||||
assert_eq!(Of::new(1, F).weekday(), Weekday::Tue);
|
||||
assert_eq!(Of::new(1, G).weekday(), Weekday::Mon);
|
||||
assert_eq!(Of::new(1, AG).weekday(), Weekday::Sun);
|
||||
assert_eq!(Of::new(1, BA).weekday(), Weekday::Sat);
|
||||
assert_eq!(Of::new(1, CB).weekday(), Weekday::Fri);
|
||||
assert_eq!(Of::new(1, DC).weekday(), Weekday::Thu);
|
||||
assert_eq!(Of::new(1, ED).weekday(), Weekday::Wed);
|
||||
assert_eq!(Of::new(1, FE).weekday(), Weekday::Tue);
|
||||
assert_eq!(Of::new(1, GF).weekday(), Weekday::Mon);
|
||||
|
||||
for &flags in FLAGS.iter() {
|
||||
let mut prev = Of::new(1, flags).weekday();
|
||||
for ordinal in range_inclusive(2u32, flags.ndays()) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
let expected = prev.succ();
|
||||
assert_eq!(of.weekday(), expected);
|
||||
prev = expected;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_fields() {
|
||||
for &flags in FLAGS.iter() {
|
||||
for month in range_inclusive(1u32, 12) {
|
||||
for day in range_inclusive(1u32, 31) {
|
||||
let mdf = Mdf::new(month, day, flags);
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf.month(), month);
|
||||
assert_eq!(mdf.day(), day);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_with_fields() {
|
||||
fn check(flags: YearFlags, month: u32, day: u32) {
|
||||
let mdf = Mdf::new(month, day, flags);
|
||||
|
||||
for month in range_inclusive(0u32, 16) {
|
||||
let mdf = mdf.with_month(month);
|
||||
assert_eq!(mdf.valid(), Mdf::new(month, day, flags).valid());
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf.month(), month);
|
||||
assert_eq!(mdf.day(), day);
|
||||
}
|
||||
}
|
||||
|
||||
for day in range_inclusive(0u32, 1024) {
|
||||
let mdf = mdf.with_day(day);
|
||||
assert_eq!(mdf.valid(), Mdf::new(month, day, flags).valid());
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf.month(), month);
|
||||
assert_eq!(mdf.day(), day);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(flags, 1, 1);
|
||||
check(flags, 1, 31);
|
||||
check(flags, 2, 1);
|
||||
check(flags, 2, 28);
|
||||
check(flags, 2, 29);
|
||||
check(flags, 12, 31);
|
||||
}
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(flags, 1, 1);
|
||||
check(flags, 1, 31);
|
||||
check(flags, 2, 1);
|
||||
check(flags, 2, 29);
|
||||
check(flags, 2, 30);
|
||||
check(flags, 12, 31);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_isoweekdate_raw() {
|
||||
for &flags in FLAGS.iter() {
|
||||
// January 4 should be in the first week
|
||||
let (week, _) = Of::new(4 /* January 4 */, flags).isoweekdate_raw();
|
||||
assert_eq!(week, 1);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_to_mdf() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let of = Of(i);
|
||||
assert_eq!(of.valid(), of.to_mdf().valid());
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_to_of() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let mdf = Mdf(i);
|
||||
assert_eq!(mdf.valid(), mdf.to_of().valid());
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_to_mdf_to_of() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let of = Of(i);
|
||||
if of.valid() {
|
||||
assert_eq!(of, of.to_mdf().to_of());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_to_of_to_mdf() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let mdf = Mdf(i);
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf, mdf.to_of().to_mdf());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,778 @@
|
|||
// This is a part of Chrono.
|
||||
// See README.md and LICENSE.txt for details.
|
||||
|
||||
//! The internal implementation of the calendar and ordinal date.
|
||||
//!
|
||||
//! The current implementation is optimized for determining year, month, day and day of week.
|
||||
//! 4-bit `YearFlags` map to one of 14 possible classes of year in the Gregorian calendar,
|
||||
//! which are included in every packed `NaiveDate` instance.
|
||||
//! The conversion between the packed calendar date (`Mdf`) and the ordinal date (`Of`) is
|
||||
//! based on the moderately-sized lookup table (~1.5KB)
|
||||
//! and the packed representation is chosen for the efficient lookup.
|
||||
//! Every internal data structure does not validate its input,
|
||||
//! but the conversion keeps the valid value valid and the invalid value invalid
|
||||
//! so that the user-facing `NaiveDate` can validate the input as late as possible.
|
||||
|
||||
#![allow(dead_code)] // some internal methods have been left for consistency
|
||||
|
||||
use std::{i32, fmt};
|
||||
use num::traits::FromPrimitive;
|
||||
use Weekday;
|
||||
use div::{div_rem, mod_floor};
|
||||
|
||||
/// The internal date representation. This also includes the packed `Mdf` value.
|
||||
pub type DateImpl = i32;
|
||||
|
||||
pub const MAX_YEAR: DateImpl = i32::MAX >> 13;
|
||||
pub const MIN_YEAR: DateImpl = i32::MIN >> 13;
|
||||
|
||||
/// The year flags (aka the dominical letter).
|
||||
///
|
||||
/// There are 14 possible classes of year in the Gregorian calendar:
|
||||
/// common and leap years starting with Monday through Sunday.
|
||||
/// The `YearFlags` stores this information into 4 bits `abbb`,
|
||||
/// where `a` is `1` for the common year (simplifies the `Of` validation)
|
||||
/// and `bbb` is a non-zero `Weekday` (mapping `Mon` to 7) of the last day in the past year
|
||||
/// (simplifies the day of week calculation from the 1-based ordinal).
|
||||
#[derive(PartialEq, Eq, Copy, Clone)]
|
||||
pub struct YearFlags(pub u8);
|
||||
|
||||
pub const A: YearFlags = YearFlags(0o15); pub const AG: YearFlags = YearFlags(0o05);
|
||||
pub const B: YearFlags = YearFlags(0o14); pub const BA: YearFlags = YearFlags(0o04);
|
||||
pub const C: YearFlags = YearFlags(0o13); pub const CB: YearFlags = YearFlags(0o03);
|
||||
pub const D: YearFlags = YearFlags(0o12); pub const DC: YearFlags = YearFlags(0o02);
|
||||
pub const E: YearFlags = YearFlags(0o11); pub const ED: YearFlags = YearFlags(0o01);
|
||||
pub const F: YearFlags = YearFlags(0o17); pub const FE: YearFlags = YearFlags(0o07);
|
||||
pub const G: YearFlags = YearFlags(0o16); pub const GF: YearFlags = YearFlags(0o06);
|
||||
|
||||
static YEAR_TO_FLAGS: [YearFlags; 400] = [
|
||||
BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F,
|
||||
ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B,
|
||||
AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E,
|
||||
DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A,
|
||||
GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, // 100
|
||||
C, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A,
|
||||
GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D,
|
||||
CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G,
|
||||
FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C,
|
||||
BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, // 200
|
||||
E, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C,
|
||||
BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F,
|
||||
ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B,
|
||||
AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E,
|
||||
DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, // 300
|
||||
G, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E,
|
||||
DC, B, A, G, FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A,
|
||||
GF, E, D, C, BA, G, F, E, DC, B, A, G, FE, D, C, B, AG, F, E, D,
|
||||
CB, A, G, F, ED, C, B, A, GF, E, D, C, BA, G, F, E, DC, B, A, G,
|
||||
FE, D, C, B, AG, F, E, D, CB, A, G, F, ED, C, B, A, GF, E, D, C, // 400
|
||||
];
|
||||
|
||||
static YEAR_DELTAS: [u8; 401] = [
|
||||
0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5,
|
||||
5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10,
|
||||
10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15,
|
||||
15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20,
|
||||
20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, // 100
|
||||
25, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29,
|
||||
29, 30, 30, 30, 30, 31, 31, 31, 31, 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34,
|
||||
34, 35, 35, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39,
|
||||
39, 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43, 44, 44, 44,
|
||||
44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, 48, 48, 48, 48, 49, 49, 49, // 200
|
||||
49, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, 52, 52, 52, 52, 53, 53, 53,
|
||||
53, 54, 54, 54, 54, 55, 55, 55, 55, 56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58,
|
||||
58, 59, 59, 59, 59, 60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63,
|
||||
63, 64, 64, 64, 64, 65, 65, 65, 65, 66, 66, 66, 66, 67, 67, 67, 67, 68, 68, 68,
|
||||
68, 69, 69, 69, 69, 70, 70, 70, 70, 71, 71, 71, 71, 72, 72, 72, 72, 73, 73, 73, // 300
|
||||
73, 73, 73, 73, 73, 74, 74, 74, 74, 75, 75, 75, 75, 76, 76, 76, 76, 77, 77, 77,
|
||||
77, 78, 78, 78, 78, 79, 79, 79, 79, 80, 80, 80, 80, 81, 81, 81, 81, 82, 82, 82,
|
||||
82, 83, 83, 83, 83, 84, 84, 84, 84, 85, 85, 85, 85, 86, 86, 86, 86, 87, 87, 87,
|
||||
87, 88, 88, 88, 88, 89, 89, 89, 89, 90, 90, 90, 90, 91, 91, 91, 91, 92, 92, 92,
|
||||
92, 93, 93, 93, 93, 94, 94, 94, 94, 95, 95, 95, 95, 96, 96, 96, 96, 97, 97, 97, 97 // 400+1
|
||||
];
|
||||
|
||||
pub fn cycle_to_yo(cycle: u32) -> (u32, u32) {
|
||||
let (mut year_mod_400, mut ordinal0) = div_rem(cycle, 365);
|
||||
let delta = YEAR_DELTAS[year_mod_400 as usize] as u32;
|
||||
if ordinal0 < delta {
|
||||
year_mod_400 -= 1;
|
||||
ordinal0 += 365 - YEAR_DELTAS[year_mod_400 as usize] as u32;
|
||||
} else {
|
||||
ordinal0 -= delta;
|
||||
}
|
||||
(year_mod_400, ordinal0 + 1)
|
||||
}
|
||||
|
||||
pub fn yo_to_cycle(year_mod_400: u32, ordinal: u32) -> u32 {
|
||||
year_mod_400 * 365 + YEAR_DELTAS[year_mod_400 as usize] as u32 + ordinal - 1
|
||||
}
|
||||
|
||||
impl YearFlags {
|
||||
#[inline]
|
||||
pub fn from_year(year: i32) -> YearFlags {
|
||||
let year = mod_floor(year, 400);
|
||||
YearFlags::from_year_mod_400(year)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn from_year_mod_400(year: i32) -> YearFlags {
|
||||
YEAR_TO_FLAGS[year as usize]
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn ndays(&self) -> u32 {
|
||||
let YearFlags(flags) = *self;
|
||||
366 - (flags >> 3) as u32
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn isoweek_delta(&self) -> u32 {
|
||||
let YearFlags(flags) = *self;
|
||||
let mut delta = flags as u32 & 0b111;
|
||||
if delta < 3 { delta += 7; }
|
||||
delta
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn nisoweeks(&self) -> u32 {
|
||||
let YearFlags(flags) = *self;
|
||||
52 + ((0b00000100_00000110 >> flags as usize) & 1)
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Debug for YearFlags {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let YearFlags(flags) = *self;
|
||||
match flags {
|
||||
0o15 => "A".fmt(f), 0o05 => "AG".fmt(f),
|
||||
0o14 => "B".fmt(f), 0o04 => "BA".fmt(f),
|
||||
0o13 => "C".fmt(f), 0o03 => "CB".fmt(f),
|
||||
0o12 => "D".fmt(f), 0o02 => "DC".fmt(f),
|
||||
0o11 => "E".fmt(f), 0o01 => "ED".fmt(f),
|
||||
0o10 => "F?".fmt(f), 0o00 => "FE?".fmt(f), // non-canonical
|
||||
0o17 => "F".fmt(f), 0o07 => "FE".fmt(f),
|
||||
0o16 => "G".fmt(f), 0o06 => "GF".fmt(f),
|
||||
_ => write!(f, "YearFlags({})", flags),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub const MIN_OL: u32 = 1 << 1;
|
||||
pub const MAX_OL: u32 = 366 << 1; // larger than the non-leap last day `(365 << 1) | 1`
|
||||
pub const MIN_MDL: u32 = (1 << 6) | (1 << 1);
|
||||
pub const MAX_MDL: u32 = (12 << 6) | (31 << 1) | 1;
|
||||
|
||||
const XX: i8 = -128;
|
||||
static MDL_TO_OL: [i8; (MAX_MDL as usize + 1)] = [
|
||||
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
|
||||
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
|
||||
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
|
||||
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, // 0
|
||||
XX, XX, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, // 1
|
||||
XX, XX, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, XX, XX, XX, XX, XX, // 2
|
||||
XX, XX, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
|
||||
72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
|
||||
72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
|
||||
72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, // 3
|
||||
XX, XX, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
|
||||
74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
|
||||
74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
|
||||
74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, XX, XX, // 4
|
||||
XX, XX, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
|
||||
78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
|
||||
78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
|
||||
78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, // 5
|
||||
XX, XX, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
|
||||
80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
|
||||
80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
|
||||
80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, XX, XX, // 6
|
||||
XX, XX, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, // 7
|
||||
XX, XX, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, // 8
|
||||
XX, XX, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, XX, XX, // 9
|
||||
XX, XX, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, // 10
|
||||
XX, XX, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, XX, XX, // 11
|
||||
XX, XX, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, // 12
|
||||
];
|
||||
|
||||
static OL_TO_MDL: [u8; (MAX_OL as usize + 1)] = [
|
||||
0, 0, // 0
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
|
||||
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, // 1
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
|
||||
66, 66, 66, 66, 66, 66, 66, 66, 66, // 2
|
||||
74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
|
||||
72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
|
||||
72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74,
|
||||
72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, 74, 72, // 3
|
||||
76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
|
||||
74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
|
||||
74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76,
|
||||
74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, 76, 74, // 4
|
||||
80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
|
||||
78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
|
||||
78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80,
|
||||
78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, 80, 78, // 5
|
||||
82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
|
||||
80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
|
||||
80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82,
|
||||
80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, 82, 80, // 6
|
||||
86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86,
|
||||
84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, 86, 84, // 7
|
||||
88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88,
|
||||
86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, 88, 86, // 8
|
||||
90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90,
|
||||
88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, 90, 88, // 9
|
||||
94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94,
|
||||
92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, 94, 92, // 10
|
||||
96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96,
|
||||
94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, 96, 94, // 11
|
||||
100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100,
|
||||
98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98,100, 98, // 12
|
||||
];
|
||||
|
||||
/// Ordinal (day of year) and year flags: `(ordinal << 4) | flags`.
|
||||
///
|
||||
/// The whole bits except for the least 3 bits are referred as `Ol` (ordinal and leap flag),
|
||||
/// which is an index to the `OL_TO_MDL` lookup table.
|
||||
#[derive(PartialEq, PartialOrd, Copy, Clone)]
|
||||
pub struct Of(pub u32);
|
||||
|
||||
impl Of {
|
||||
#[inline]
|
||||
fn clamp_ordinal(ordinal: u32) -> u32 {
|
||||
if ordinal > 366 {0} else {ordinal}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn new(ordinal: u32, YearFlags(flags): YearFlags) -> Of {
|
||||
let ordinal = Of::clamp_ordinal(ordinal);
|
||||
Of((ordinal << 4) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn from_mdf(Mdf(mdf): Mdf) -> Of {
|
||||
let mdl = mdf >> 3;
|
||||
match MDL_TO_OL.get(mdl as usize) {
|
||||
Some(&v) => Of(mdf.wrapping_sub((v as i32 as u32 & 0x3ff) << 3)),
|
||||
None => Of(0)
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn valid(&self) -> bool {
|
||||
let Of(of) = *self;
|
||||
let ol = of >> 3;
|
||||
MIN_OL <= ol && ol <= MAX_OL
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn ordinal(&self) -> u32 {
|
||||
let Of(of) = *self;
|
||||
of >> 4
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_ordinal(&self, ordinal: u32) -> Of {
|
||||
let ordinal = Of::clamp_ordinal(ordinal);
|
||||
let Of(of) = *self;
|
||||
Of((of & 0b1111) | (ordinal << 4))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn flags(&self) -> YearFlags {
|
||||
let Of(of) = *self;
|
||||
YearFlags((of & 0b1111) as u8)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_flags(&self, YearFlags(flags): YearFlags) -> Of {
|
||||
let Of(of) = *self;
|
||||
Of((of & !0b1111) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn weekday(&self) -> Weekday {
|
||||
let Of(of) = *self;
|
||||
Weekday::from_u32(((of >> 4) + (of & 0b111)) % 7).unwrap()
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn isoweekdate_raw(&self) -> (u32, Weekday) {
|
||||
// week ordinal = ordinal + delta
|
||||
let Of(of) = *self;
|
||||
let weekord = (of >> 4).wrapping_add(self.flags().isoweek_delta());
|
||||
(weekord / 7, Weekday::from_u32(weekord % 7).unwrap())
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn to_mdf(&self) -> Mdf {
|
||||
Mdf::from_of(*self)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn succ(&self) -> Of {
|
||||
let Of(of) = *self;
|
||||
Of(of + (1 << 4))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn pred(&self) -> Of {
|
||||
let Of(of) = *self;
|
||||
Of(of - (1 << 4))
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Debug for Of {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let Of(of) = *self;
|
||||
write!(f, "Of(({} << 4) | {:#04o} /*{:?}*/)",
|
||||
of >> 4, of & 0b1111, YearFlags((of & 0b1111) as u8))
|
||||
}
|
||||
}
|
||||
|
||||
/// Month, day of month and year flags: `(month << 9) | (day << 4) | flags`
|
||||
///
|
||||
/// The whole bits except for the least 3 bits are referred as `Mdl`
|
||||
/// (month, day of month and leap flag),
|
||||
/// which is an index to the `MDL_TO_OL` lookup table.
|
||||
#[derive(PartialEq, PartialOrd, Copy, Clone)]
|
||||
pub struct Mdf(pub u32);
|
||||
|
||||
impl Mdf {
|
||||
#[inline]
|
||||
fn clamp_month(month: u32) -> u32 {
|
||||
if month > 12 {0} else {month}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
fn clamp_day(day: u32) -> u32 {
|
||||
if day > 31 {0} else {day}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn new(month: u32, day: u32, YearFlags(flags): YearFlags) -> Mdf {
|
||||
let month = Mdf::clamp_month(month);
|
||||
let day = Mdf::clamp_day(day);
|
||||
Mdf((month << 9) | (day << 4) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn from_of(Of(of): Of) -> Mdf {
|
||||
let ol = of >> 3;
|
||||
match OL_TO_MDL.get(ol as usize) {
|
||||
Some(&v) => Mdf(of + ((v as u32) << 3)),
|
||||
None => Mdf(0)
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn valid(&self) -> bool {
|
||||
let Mdf(mdf) = *self;
|
||||
let mdl = mdf >> 3;
|
||||
match MDL_TO_OL.get(mdl as usize) {
|
||||
Some(&v) => v >= 0,
|
||||
None => false
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn month(&self) -> u32 {
|
||||
let Mdf(mdf) = *self;
|
||||
mdf >> 9
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_month(&self, month: u32) -> Mdf {
|
||||
let month = Mdf::clamp_month(month);
|
||||
let Mdf(mdf) = *self;
|
||||
Mdf((mdf & 0b11111_1111) | (month << 9))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn day(&self) -> u32 {
|
||||
let Mdf(mdf) = *self;
|
||||
(mdf >> 4) & 0b11111
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_day(&self, day: u32) -> Mdf {
|
||||
let day = Mdf::clamp_day(day);
|
||||
let Mdf(mdf) = *self;
|
||||
Mdf((mdf & !0b11111_0000) | (day << 4))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn flags(&self) -> YearFlags {
|
||||
let Mdf(mdf) = *self;
|
||||
YearFlags((mdf & 0b1111) as u8)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn with_flags(&self, YearFlags(flags): YearFlags) -> Mdf {
|
||||
let Mdf(mdf) = *self;
|
||||
Mdf((mdf & !0b1111) | (flags as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn to_of(&self) -> Of {
|
||||
Of::from_mdf(*self)
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Debug for Mdf {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let Mdf(mdf) = *self;
|
||||
write!(f, "Mdf(({} << 9) | ({} << 4) | {:#04o} /*{:?}*/)",
|
||||
mdf >> 9, (mdf >> 4) & 0b11111, mdf & 0b1111, YearFlags((mdf & 0b1111) as u8))
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
#[cfg(bench)] extern crate test;
|
||||
|
||||
use Weekday;
|
||||
use super::{Of, Mdf};
|
||||
use super::{YearFlags, A, B, C, D, E, F, G, AG, BA, CB, DC, ED, FE, GF};
|
||||
use num::iter::range_inclusive;
|
||||
use std::u32;
|
||||
|
||||
const NONLEAP_FLAGS: [YearFlags; 7] = [A, B, C, D, E, F, G];
|
||||
const LEAP_FLAGS: [YearFlags; 7] = [AG, BA, CB, DC, ED, FE, GF];
|
||||
const FLAGS: [YearFlags; 14] = [A, B, C, D, E, F, G, AG, BA, CB, DC, ED, FE, GF];
|
||||
|
||||
#[test]
|
||||
fn test_year_flags_ndays_from_year() {
|
||||
assert_eq!(YearFlags::from_year(2014).ndays(), 365);
|
||||
assert_eq!(YearFlags::from_year(2012).ndays(), 366);
|
||||
assert_eq!(YearFlags::from_year(2000).ndays(), 366);
|
||||
assert_eq!(YearFlags::from_year(1900).ndays(), 365);
|
||||
assert_eq!(YearFlags::from_year(1600).ndays(), 366);
|
||||
assert_eq!(YearFlags::from_year( 1).ndays(), 365);
|
||||
assert_eq!(YearFlags::from_year( 0).ndays(), 366); // 1 BCE (proleptic Gregorian)
|
||||
assert_eq!(YearFlags::from_year( -1).ndays(), 365); // 2 BCE
|
||||
assert_eq!(YearFlags::from_year( -4).ndays(), 366); // 5 BCE
|
||||
assert_eq!(YearFlags::from_year( -99).ndays(), 365); // 100 BCE
|
||||
assert_eq!(YearFlags::from_year(-100).ndays(), 365); // 101 BCE
|
||||
assert_eq!(YearFlags::from_year(-399).ndays(), 365); // 400 BCE
|
||||
assert_eq!(YearFlags::from_year(-400).ndays(), 366); // 401 BCE
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_year_flags_nisoweeks() {
|
||||
assert_eq!(A.nisoweeks(), 52);
|
||||
assert_eq!(B.nisoweeks(), 52);
|
||||
assert_eq!(C.nisoweeks(), 52);
|
||||
assert_eq!(D.nisoweeks(), 53);
|
||||
assert_eq!(E.nisoweeks(), 52);
|
||||
assert_eq!(F.nisoweeks(), 52);
|
||||
assert_eq!(G.nisoweeks(), 52);
|
||||
assert_eq!(AG.nisoweeks(), 52);
|
||||
assert_eq!(BA.nisoweeks(), 52);
|
||||
assert_eq!(CB.nisoweeks(), 52);
|
||||
assert_eq!(DC.nisoweeks(), 53);
|
||||
assert_eq!(ED.nisoweeks(), 53);
|
||||
assert_eq!(FE.nisoweeks(), 52);
|
||||
assert_eq!(GF.nisoweeks(), 52);
|
||||
}
|
||||
|
||||
#[cfg(bench)]
|
||||
#[bench]
|
||||
fn bench_year_flags_from_year(bh: &mut test::Bencher) {
|
||||
bh.iter(|| {
|
||||
for year in -999i32..1000 {
|
||||
YearFlags::from_year(year);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of() {
|
||||
fn check(expected: bool, flags: YearFlags, ordinal1: u32, ordinal2: u32) {
|
||||
for ordinal in range_inclusive(ordinal1, ordinal2) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
assert!(of.valid() == expected,
|
||||
"ordinal {} = {:?} should be {} for dominical year {:?}",
|
||||
ordinal, of, if expected {"valid"} else {"invalid"}, flags);
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0);
|
||||
check(true, flags, 1, 365);
|
||||
check(false, flags, 366, 1024);
|
||||
check(false, flags, u32::MAX, u32::MAX);
|
||||
}
|
||||
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0);
|
||||
check(true, flags, 1, 366);
|
||||
check(false, flags, 367, 1024);
|
||||
check(false, flags, u32::MAX, u32::MAX);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_valid() {
|
||||
fn check(expected: bool, flags: YearFlags, month1: u32, day1: u32,
|
||||
month2: u32, day2: u32) {
|
||||
for month in range_inclusive(month1, month2) {
|
||||
for day in range_inclusive(day1, day2) {
|
||||
let mdf = Mdf::new(month, day, flags);
|
||||
assert!(mdf.valid() == expected,
|
||||
"month {} day {} = {:?} should be {} for dominical year {:?}",
|
||||
month, day, mdf, if expected {"valid"} else {"invalid"}, flags);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0, 0, 1024);
|
||||
check(false, flags, 0, 0, 16, 0);
|
||||
check(true, flags, 1, 1, 1, 31); check(false, flags, 1, 32, 1, 1024);
|
||||
check(true, flags, 2, 1, 2, 28); check(false, flags, 2, 29, 2, 1024);
|
||||
check(true, flags, 3, 1, 3, 31); check(false, flags, 3, 32, 3, 1024);
|
||||
check(true, flags, 4, 1, 4, 30); check(false, flags, 4, 31, 4, 1024);
|
||||
check(true, flags, 5, 1, 5, 31); check(false, flags, 5, 32, 5, 1024);
|
||||
check(true, flags, 6, 1, 6, 30); check(false, flags, 6, 31, 6, 1024);
|
||||
check(true, flags, 7, 1, 7, 31); check(false, flags, 7, 32, 7, 1024);
|
||||
check(true, flags, 8, 1, 8, 31); check(false, flags, 8, 32, 8, 1024);
|
||||
check(true, flags, 9, 1, 9, 30); check(false, flags, 9, 31, 9, 1024);
|
||||
check(true, flags, 10, 1, 10, 31); check(false, flags, 10, 32, 10, 1024);
|
||||
check(true, flags, 11, 1, 11, 30); check(false, flags, 11, 31, 11, 1024);
|
||||
check(true, flags, 12, 1, 12, 31); check(false, flags, 12, 32, 12, 1024);
|
||||
check(false, flags, 13, 0, 16, 1024);
|
||||
check(false, flags, u32::MAX, 0, u32::MAX, 1024);
|
||||
check(false, flags, 0, u32::MAX, 16, u32::MAX);
|
||||
check(false, flags, u32::MAX, u32::MAX, u32::MAX, u32::MAX);
|
||||
}
|
||||
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(false, flags, 0, 0, 0, 1024);
|
||||
check(false, flags, 0, 0, 16, 0);
|
||||
check(true, flags, 1, 1, 1, 31); check(false, flags, 1, 32, 1, 1024);
|
||||
check(true, flags, 2, 1, 2, 29); check(false, flags, 2, 30, 2, 1024);
|
||||
check(true, flags, 3, 1, 3, 31); check(false, flags, 3, 32, 3, 1024);
|
||||
check(true, flags, 4, 1, 4, 30); check(false, flags, 4, 31, 4, 1024);
|
||||
check(true, flags, 5, 1, 5, 31); check(false, flags, 5, 32, 5, 1024);
|
||||
check(true, flags, 6, 1, 6, 30); check(false, flags, 6, 31, 6, 1024);
|
||||
check(true, flags, 7, 1, 7, 31); check(false, flags, 7, 32, 7, 1024);
|
||||
check(true, flags, 8, 1, 8, 31); check(false, flags, 8, 32, 8, 1024);
|
||||
check(true, flags, 9, 1, 9, 30); check(false, flags, 9, 31, 9, 1024);
|
||||
check(true, flags, 10, 1, 10, 31); check(false, flags, 10, 32, 10, 1024);
|
||||
check(true, flags, 11, 1, 11, 30); check(false, flags, 11, 31, 11, 1024);
|
||||
check(true, flags, 12, 1, 12, 31); check(false, flags, 12, 32, 12, 1024);
|
||||
check(false, flags, 13, 0, 16, 1024);
|
||||
check(false, flags, u32::MAX, 0, u32::MAX, 1024);
|
||||
check(false, flags, 0, u32::MAX, 16, u32::MAX);
|
||||
check(false, flags, u32::MAX, u32::MAX, u32::MAX, u32::MAX);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_fields() {
|
||||
for &flags in FLAGS.iter() {
|
||||
for ordinal in range_inclusive(1u32, 366) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
if of.valid() {
|
||||
assert_eq!(of.ordinal(), ordinal);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_with_fields() {
|
||||
fn check(flags: YearFlags, ordinal: u32) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
|
||||
for ordinal in range_inclusive(0u32, 1024) {
|
||||
let of = of.with_ordinal(ordinal);
|
||||
assert_eq!(of.valid(), Of::new(ordinal, flags).valid());
|
||||
if of.valid() {
|
||||
assert_eq!(of.ordinal(), ordinal);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(flags, 1);
|
||||
check(flags, 365);
|
||||
}
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(flags, 1);
|
||||
check(flags, 366);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_weekday() {
|
||||
assert_eq!(Of::new(1, A).weekday(), Weekday::Sun);
|
||||
assert_eq!(Of::new(1, B).weekday(), Weekday::Sat);
|
||||
assert_eq!(Of::new(1, C).weekday(), Weekday::Fri);
|
||||
assert_eq!(Of::new(1, D).weekday(), Weekday::Thu);
|
||||
assert_eq!(Of::new(1, E).weekday(), Weekday::Wed);
|
||||
assert_eq!(Of::new(1, F).weekday(), Weekday::Tue);
|
||||
assert_eq!(Of::new(1, G).weekday(), Weekday::Mon);
|
||||
assert_eq!(Of::new(1, AG).weekday(), Weekday::Sun);
|
||||
assert_eq!(Of::new(1, BA).weekday(), Weekday::Sat);
|
||||
assert_eq!(Of::new(1, CB).weekday(), Weekday::Fri);
|
||||
assert_eq!(Of::new(1, DC).weekday(), Weekday::Thu);
|
||||
assert_eq!(Of::new(1, ED).weekday(), Weekday::Wed);
|
||||
assert_eq!(Of::new(1, FE).weekday(), Weekday::Tue);
|
||||
assert_eq!(Of::new(1, GF).weekday(), Weekday::Mon);
|
||||
|
||||
for &flags in FLAGS.iter() {
|
||||
let mut prev = Of::new(1, flags).weekday();
|
||||
for ordinal in range_inclusive(2u32, flags.ndays()) {
|
||||
let of = Of::new(ordinal, flags);
|
||||
let expected = prev.succ();
|
||||
assert_eq!(of.weekday(), expected);
|
||||
prev = expected;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_fields() {
|
||||
for &flags in FLAGS.iter() {
|
||||
for month in range_inclusive(1u32, 12) {
|
||||
for day in range_inclusive(1u32, 31) {
|
||||
let mdf = Mdf::new(month, day, flags);
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf.month(), month);
|
||||
assert_eq!(mdf.day(), day);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_with_fields() {
|
||||
fn check(flags: YearFlags, month: u32, day: u32) {
|
||||
let mdf = Mdf::new(month, day, flags);
|
||||
|
||||
for month in range_inclusive(0u32, 16) {
|
||||
let mdf = mdf.with_month(month);
|
||||
assert_eq!(mdf.valid(), Mdf::new(month, day, flags).valid());
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf.month(), month);
|
||||
assert_eq!(mdf.day(), day);
|
||||
}
|
||||
}
|
||||
|
||||
for day in range_inclusive(0u32, 1024) {
|
||||
let mdf = mdf.with_day(day);
|
||||
assert_eq!(mdf.valid(), Mdf::new(month, day, flags).valid());
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf.month(), month);
|
||||
assert_eq!(mdf.day(), day);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for &flags in NONLEAP_FLAGS.iter() {
|
||||
check(flags, 1, 1);
|
||||
check(flags, 1, 31);
|
||||
check(flags, 2, 1);
|
||||
check(flags, 2, 28);
|
||||
check(flags, 2, 29);
|
||||
check(flags, 12, 31);
|
||||
}
|
||||
for &flags in LEAP_FLAGS.iter() {
|
||||
check(flags, 1, 1);
|
||||
check(flags, 1, 31);
|
||||
check(flags, 2, 1);
|
||||
check(flags, 2, 29);
|
||||
check(flags, 2, 30);
|
||||
check(flags, 12, 31);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_isoweekdate_raw() {
|
||||
for &flags in FLAGS.iter() {
|
||||
// January 4 should be in the first week
|
||||
let (week, _) = Of::new(4 /* January 4 */, flags).isoweekdate_raw();
|
||||
assert_eq!(week, 1);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_to_mdf() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let of = Of(i);
|
||||
assert_eq!(of.valid(), of.to_mdf().valid());
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_to_of() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let mdf = Mdf(i);
|
||||
assert_eq!(mdf.valid(), mdf.to_of().valid());
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_of_to_mdf_to_of() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let of = Of(i);
|
||||
if of.valid() {
|
||||
assert_eq!(of, of.to_mdf().to_of());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_mdf_to_of_to_mdf() {
|
||||
for i in range_inclusive(0u32, 8192) {
|
||||
let mdf = Mdf(i);
|
||||
if mdf.valid() {
|
||||
assert_eq!(mdf, mdf.to_of().to_mdf());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue