Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 203 insertions, 0 deletions

diff --git a/third_party/rust/version_check/src/date.rs b/third_party/rust/version_check/src/date.rs
new file mode 100644
index 0000000000..de0b2d05d7
--- /dev/null
+++ b/third_party/rust/version_check/src/date.rs
@@ -0,0 +1,203 @@
+use std::fmt;
+
+/// Release date including year, month, and day.
+// Internal storage is: y[31..9] | m[8..5] | d[5...0].
+#[derive(Debug, PartialEq, Eq, Copy, Clone, PartialOrd, Ord)]
+pub struct Date(u32);
+
+impl Date {
+    /// Reads the release date of the running compiler. If it cannot be
+    /// determined (see the [top-level documentation](crate)), returns `None`.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use version_check::Date;
+    ///
+    /// match Date::read() {
+    ///     Some(d) => format!("The release date is: {}", d),
+    ///     None => format!("Failed to read the release date.")
+    /// };
+    /// ```
+    pub fn read() -> Option<Date> {
+        ::get_version_and_date()
+            .and_then(|(_, date)| date)
+            .and_then(|date| Date::parse(&date))
+    }
+
+    /// Parse a release date of the form `%Y-%m-%d`. Returns `None` if `date` is
+    /// not in `%Y-%m-%d` format.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use version_check::Date;
+    ///
+    /// let date = Date::parse("2016-04-20").unwrap();
+    ///
+    /// assert!(date.at_least("2016-01-10"));
+    /// assert!(date.at_most("2016-04-20"));
+    /// assert!(date.exactly("2016-04-20"));
+    ///
+    /// assert!(Date::parse("2021-12-31").unwrap().exactly("2021-12-31"));
+    ///
+    /// assert!(Date::parse("March 13, 2018").is_none());
+    /// assert!(Date::parse("1-2-3-4-5").is_none());
+    /// assert!(Date::parse("2020-300-23120").is_none());
+    /// assert!(Date::parse("2020-12-12 1").is_none());
+    /// assert!(Date::parse("2020-10").is_none());
+    /// assert!(Date::parse("2020").is_none());
+    /// ```
+    pub fn parse(date: &str) -> Option<Date> {
+        let mut ymd = [0u16; 3];
+        for (i, split) in date.split('-').map(|s| s.parse::<u16>()).enumerate() {
+            ymd[i] = match (i, split) {
+                (3, _) | (_, Err(_)) => return None,
+                (_, Ok(v)) => v,
+            };
+        }
+
+        let (year, month, day) = (ymd[0], ymd[1], ymd[2]);
+        if year == 0 || month == 0 || month > 12 || day == 0 || day > 31 {
+            return None;
+        }
+
+        Some(Date::from_ymd(year, month as u8, day as u8))
+    }
+
+    /// Creates a `Date` from `(year, month, day)` date components.
+    ///
+    /// Does not check the validity of `year`, `month`, or `day`, but `year` is
+    /// truncated to 23 bits (% 8,388,608), `month` to 4 bits (% 16), and `day`
+    /// to 5 bits (% 32).
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use version_check::Date;
+    ///
+    /// assert!(Date::from_ymd(2021, 7, 30).exactly("2021-07-30"));
+    /// assert!(Date::from_ymd(2010, 3, 23).exactly("2010-03-23"));
+    /// assert!(Date::from_ymd(2090, 1, 31).exactly("2090-01-31"));
+    ///
+    /// // Truncation: 33 % 32 == 0x21 & 0x1F == 1.
+    /// assert!(Date::from_ymd(2090, 1, 33).exactly("2090-01-01"));
+    /// ```
+    pub fn from_ymd(year: u16, month: u8, day: u8) -> Date {
+        let year = (year as u32) << 9;
+        let month = ((month as u32) & 0xF) << 5;
+        let day = (day as u32) & 0x1F;
+        Date(year | month | day)
+    }
+
+    /// Return the original (YYYY, MM, DD).
+    fn to_ymd(&self) -> (u16, u8, u8) {
+        let y = self.0 >> 9;
+        let m = (self.0 >> 5) & 0xF;
+        let d = self.0 & 0x1F;
+        (y as u16, m as u8, d as u8)
+    }
+
+    /// Returns `true` if `self` occurs on or after `date`.
+    ///
+    /// If `date` occurs before `self`, or if `date` is not in `%Y-%m-%d`
+    /// format, returns `false`.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use version_check::Date;
+    ///
+    /// let date = Date::parse("2020-01-01").unwrap();
+    ///
+    /// assert!(date.at_least("2019-12-31"));
+    /// assert!(date.at_least("2020-01-01"));
+    /// assert!(date.at_least("2014-04-31"));
+    ///
+    /// assert!(!date.at_least("2020-01-02"));
+    /// assert!(!date.at_least("2024-08-18"));
+    /// ```
+    pub fn at_least(&self, date: &str) -> bool {
+        Date::parse(date)
+            .map(|date| self >= &date)
+            .unwrap_or(false)
+    }
+
+    /// Returns `true` if `self` occurs on or before `date`.
+    ///
+    /// If `date` occurs after `self`, or if `date` is not in `%Y-%m-%d`
+    /// format, returns `false`.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use version_check::Date;
+    ///
+    /// let date = Date::parse("2020-01-01").unwrap();
+    ///
+    /// assert!(date.at_most("2020-01-01"));
+    /// assert!(date.at_most("2020-01-02"));
+    /// assert!(date.at_most("2024-08-18"));
+    ///
+    /// assert!(!date.at_most("2019-12-31"));
+    /// assert!(!date.at_most("2014-04-31"));
+    /// ```
+    pub fn at_most(&self, date: &str) -> bool {
+        Date::parse(date)
+            .map(|date| self <= &date)
+            .unwrap_or(false)
+    }
+
+    /// Returns `true` if `self` occurs exactly on `date`.
+    ///
+    /// If `date` is not exactly `self`, or if `date` is not in `%Y-%m-%d`
+    /// format, returns `false`.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use version_check::Date;
+    ///
+    /// let date = Date::parse("2020-01-01").unwrap();
+    ///
+    /// assert!(date.exactly("2020-01-01"));
+    ///
+    /// assert!(!date.exactly("2019-12-31"));
+    /// assert!(!date.exactly("2014-04-31"));
+    /// assert!(!date.exactly("2020-01-02"));
+    /// assert!(!date.exactly("2024-08-18"));
+    /// ```
+    pub fn exactly(&self, date: &str) -> bool {
+        Date::parse(date)
+            .map(|date| self == &date)
+            .unwrap_or(false)
+    }
+}
+
+impl fmt::Display for Date {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let (y, m, d) = self.to_ymd();
+        write!(f, "{}-{:02}-{:02}", y, m, d)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Date;
+
+    macro_rules! reflexive_display {
+        ($string:expr) => (
+            assert_eq!(Date::parse($string).unwrap().to_string(), $string);
+        )
+    }
+
+    #[test]
+    fn display() {
+        reflexive_display!("2019-05-08");
+        reflexive_display!("2000-01-01");
+        reflexive_display!("2000-12-31");
+        reflexive_display!("2090-12-31");
+        reflexive_display!("1999-02-19");
+        reflexive_display!("9999-12-31");
+    }
+}