1 files changed, 127 insertions, 0 deletions
diff --git a/vendor/time-macros/src/helpers/mod.rs b/vendor/time-macros/src/helpers/mod.rs
new file mode 100644
index 0000000..56300b3
--- /dev/null
+++ b/vendor/time-macros/src/helpers/mod.rs
@@ -0,0 +1,127 @@
+#[cfg(any(feature = "formatting", feature = "parsing"))]
+mod string;
+
+use std::iter::Peekable;
+use std::str::FromStr;
+
+use proc_macro::{token_stream, Span, TokenTree};
+use time_core::util::{days_in_year, is_leap_year};
+
+use crate::Error;
+
+#[cfg(any(feature = "formatting", feature = "parsing"))]
+pub(crate) fn get_string_literal(
+    mut tokens: impl Iterator<Item = TokenTree>,
+) -> Result<(Span, Vec<u8>), Error> {
+    match (tokens.next(), tokens.next()) {
+        (Some(TokenTree::Literal(literal)), None) => string::parse(&literal),
+        (Some(tree), None) => Err(Error::ExpectedString {
+            span_start: Some(tree.span()),
+            span_end: Some(tree.span()),
+        }),
+        (_, Some(tree)) => Err(Error::UnexpectedToken { tree }),
+        (None, None) => Err(Error::ExpectedString {
+            span_start: None,
+            span_end: None,
+        }),
+    }
+}
+
+pub(crate) fn consume_number<T: FromStr>(
+    component_name: &'static str,
+    chars: &mut Peekable<token_stream::IntoIter>,
+) -> Result<(Span, T), Error> {
+    let (span, digits) = match chars.next() {
+        Some(TokenTree::Literal(literal)) => (literal.span(), literal.to_string()),
+        Some(tree) => return Err(Error::UnexpectedToken { tree }),
+        None => return Err(Error::UnexpectedEndOfInput),
+    };
+
+    if let Ok(value) = digits.replace('_', "").parse() {
+        Ok((span, value))
+    } else {
+        Err(Error::InvalidComponent {
+            name: component_name,
+            value: digits,
+            span_start: Some(span),
+            span_end: Some(span),
+        })
+    }
+}
+
+pub(crate) fn consume_any_ident(
+    idents: &[&str],
+    chars: &mut Peekable<token_stream::IntoIter>,
+) -> Result<Span, Error> {
+    match chars.peek() {
+        Some(TokenTree::Ident(char)) if idents.contains(&char.to_string().as_str()) => {
+            let ret = Ok(char.span());
+            drop(chars.next());
+            ret
+        }
+        Some(tree) => Err(Error::UnexpectedToken { tree: tree.clone() }),
+        None => Err(Error::UnexpectedEndOfInput),
+    }
+}
+
+pub(crate) fn consume_punct(
+    c: char,
+    chars: &mut Peekable<token_stream::IntoIter>,
+) -> Result<Span, Error> {
+    match chars.peek() {
+        Some(TokenTree::Punct(punct)) if *punct == c => {
+            let ret = Ok(punct.span());
+            drop(chars.next());
+            ret
+        }
+        Some(tree) => Err(Error::UnexpectedToken { tree: tree.clone() }),
+        None => Err(Error::UnexpectedEndOfInput),
+    }
+}
+
+fn jan_weekday(year: i32, ordinal: i32) -> u8 {
+    macro_rules! div_floor {
+        ($a:expr, $b:expr) => {{
+            let (_quotient, _remainder) = ($a / $b, $a % $b);
+            if (_remainder > 0 && $b < 0) || (_remainder < 0 && $b > 0) {
+                _quotient - 1
+            } else {
+                _quotient
+            }
+        }};
+    }
+
+    let adj_year = year - 1;
+    ((ordinal + adj_year + div_floor!(adj_year, 4) - div_floor!(adj_year, 100)
+        + div_floor!(adj_year, 400)
+        + 6)
+    .rem_euclid(7)) as _
+}
+
+pub(crate) fn days_in_year_month(year: i32, month: u8) -> u8 {
+    [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month as usize - 1]
+        + (month == 2 && is_leap_year(year)) as u8
+}
+
+pub(crate) fn ywd_to_yo(year: i32, week: u8, iso_weekday_number: u8) -> (i32, u16) {
+    let (ordinal, overflow) = (u16::from(week) * 7 + u16::from(iso_weekday_number))
+        .overflowing_sub(u16::from(jan_weekday(year, 4)) + 4);
+
+    if overflow || ordinal == 0 {
+        return (year - 1, (ordinal.wrapping_add(days_in_year(year - 1))));
+    }
+
+    let days_in_cur_year = days_in_year(year);
+    if ordinal > days_in_cur_year {
+        (year + 1, ordinal - days_in_cur_year)
+    } else {
+        (year, ordinal)
+    }
+}
+
+pub(crate) fn ymd_to_yo(year: i32, month: u8, day: u8) -> (i32, u16) {
+    let ordinal = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334][month as usize - 1]
+        + (month > 2 && is_leap_year(year)) as u16;
+
+    (year, ordinal + u16::from(day))
+}