1 files changed, 236 insertions, 0 deletions
diff --git a/vendor/chrono/src/offset/local/stub.rs b/vendor/chrono/src/offset/local/stub.rs
new file mode 100644
index 000000000..9ececd3c2
--- /dev/null
+++ b/vendor/chrono/src/offset/local/stub.rs
@@ -0,0 +1,236 @@
+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use super::{FixedOffset, Local};
+use crate::{DateTime, Datelike, LocalResult, NaiveDate, NaiveDateTime, NaiveTime, Timelike};
+
+pub(super) fn now() -> DateTime<Local> {
+    tm_to_datetime(Timespec::now().local())
+}
+
+/// Converts a local `NaiveDateTime` to the `time::Timespec`.
+#[cfg(not(all(
+    target_arch = "wasm32",
+    feature = "wasmbind",
+    not(any(target_os = "emscripten", target_os = "wasi"))
+)))]
+pub(super) fn naive_to_local(d: &NaiveDateTime, local: bool) -> LocalResult<DateTime<Local>> {
+    let tm = Tm {
+        tm_sec: d.second() as i32,
+        tm_min: d.minute() as i32,
+        tm_hour: d.hour() as i32,
+        tm_mday: d.day() as i32,
+        tm_mon: d.month0() as i32, // yes, C is that strange...
+        tm_year: d.year() - 1900,  // this doesn't underflow, we know that d is `NaiveDateTime`.
+        tm_wday: 0,                // to_local ignores this
+        tm_yday: 0,                // and this
+        tm_isdst: -1,
+        // This seems pretty fake?
+        tm_utcoff: if local { 1 } else { 0 },
+        // do not set this, OS APIs are heavily inconsistent in terms of leap second handling
+        tm_nsec: 0,
+    };
+
+    let spec = Timespec {
+        sec: match local {
+            false => utc_tm_to_time(&tm),
+            true => local_tm_to_time(&tm),
+        },
+        nsec: tm.tm_nsec,
+    };
+
+    // Adjust for leap seconds
+    let mut tm = spec.local();
+    assert_eq!(tm.tm_nsec, 0);
+    tm.tm_nsec = d.nanosecond() as i32;
+
+    LocalResult::Single(tm_to_datetime(tm))
+}
+
+/// Converts a `time::Tm` struct into the timezone-aware `DateTime`.
+/// This assumes that `time` is working correctly, i.e. any error is fatal.
+#[cfg(not(all(
+    target_arch = "wasm32",
+    feature = "wasmbind",
+    not(any(target_os = "emscripten", target_os = "wasi"))
+)))]
+fn tm_to_datetime(mut tm: Tm) -> DateTime<Local> {
+    if tm.tm_sec >= 60 {
+        tm.tm_nsec += (tm.tm_sec - 59) * 1_000_000_000;
+        tm.tm_sec = 59;
+    }
+
+    let date = NaiveDate::from_yo(tm.tm_year + 1900, tm.tm_yday as u32 + 1);
+    let time = NaiveTime::from_hms_nano(
+        tm.tm_hour as u32,
+        tm.tm_min as u32,
+        tm.tm_sec as u32,
+        tm.tm_nsec as u32,
+    );
+
+    let offset = FixedOffset::east_opt(tm.tm_utcoff).unwrap();
+    DateTime::from_utc(date.and_time(time) - offset, offset)
+}
+
+/// A record specifying a time value in seconds and nanoseconds, where
+/// nanoseconds represent the offset from the given second.
+///
+/// For example a timespec of 1.2 seconds after the beginning of the epoch would
+/// be represented as {sec: 1, nsec: 200000000}.
+struct Timespec {
+    sec: i64,
+    nsec: i32,
+}
+
+impl Timespec {
+    /// Constructs a timespec representing the current time in UTC.
+    fn now() -> Timespec {
+        let st =
+            SystemTime::now().duration_since(UNIX_EPOCH).expect("system time before Unix epoch");
+        Timespec { sec: st.as_secs() as i64, nsec: st.subsec_nanos() as i32 }
+    }
+
+    /// Converts this timespec into the system's local time.
+    fn local(self) -> Tm {
+        let mut tm = Tm {
+            tm_sec: 0,
+            tm_min: 0,
+            tm_hour: 0,
+            tm_mday: 0,
+            tm_mon: 0,
+            tm_year: 0,
+            tm_wday: 0,
+            tm_yday: 0,
+            tm_isdst: 0,
+            tm_utcoff: 0,
+            tm_nsec: 0,
+        };
+        time_to_local_tm(self.sec, &mut tm);
+        tm.tm_nsec = self.nsec;
+        tm
+    }
+}
+
+/// Holds a calendar date and time broken down into its components (year, month,
+/// day, and so on), also called a broken-down time value.
+// FIXME: use c_int instead of i32?
+#[repr(C)]
+pub(super) struct Tm {
+    /// Seconds after the minute - [0, 60]
+    tm_sec: i32,
+
+    /// Minutes after the hour - [0, 59]
+    tm_min: i32,
+
+    /// Hours after midnight - [0, 23]
+    tm_hour: i32,
+
+    /// Day of the month - [1, 31]
+    tm_mday: i32,
+
+    /// Months since January - [0, 11]
+    tm_mon: i32,
+
+    /// Years since 1900
+    tm_year: i32,
+
+    /// Days since Sunday - [0, 6]. 0 = Sunday, 1 = Monday, ..., 6 = Saturday.
+    tm_wday: i32,
+
+    /// Days since January 1 - [0, 365]
+    tm_yday: i32,
+
+    /// Daylight Saving Time flag.
+    ///
+    /// This value is positive if Daylight Saving Time is in effect, zero if
+    /// Daylight Saving Time is not in effect, and negative if this information
+    /// is not available.
+    tm_isdst: i32,
+
+    /// Identifies the time zone that was used to compute this broken-down time
+    /// value, including any adjustment for Daylight Saving Time. This is the
+    /// number of seconds east of UTC. For example, for U.S. Pacific Daylight
+    /// Time, the value is `-7*60*60 = -25200`.
+    tm_utcoff: i32,
+
+    /// Nanoseconds after the second - [0, 10<sup>9</sup> - 1]
+    tm_nsec: i32,
+}
+
+fn time_to_tm(ts: i64, tm: &mut Tm) {
+    let leapyear = |year| -> bool { year % 4 == 0 && (year % 100 != 0 || year % 400 == 0) };
+
+    static YTAB: [[i64; 12]; 2] = [
+        [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
+        [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
+    ];
+
+    let mut year = 1970;
+
+    let dayclock = ts % 86400;
+    let mut dayno = ts / 86400;
+
+    tm.tm_sec = (dayclock % 60) as i32;
+    tm.tm_min = ((dayclock % 3600) / 60) as i32;
+    tm.tm_hour = (dayclock / 3600) as i32;
+    tm.tm_wday = ((dayno + 4) % 7) as i32;
+    loop {
+        let yearsize = if leapyear(year) { 366 } else { 365 };
+        if dayno >= yearsize {
+            dayno -= yearsize;
+            year += 1;
+        } else {
+            break;
+        }
+    }
+    tm.tm_year = (year - 1900) as i32;
+    tm.tm_yday = dayno as i32;
+    let mut mon = 0;
+    while dayno >= YTAB[if leapyear(year) { 1 } else { 0 }][mon] {
+        dayno -= YTAB[if leapyear(year) { 1 } else { 0 }][mon];
+        mon += 1;
+    }
+    tm.tm_mon = mon as i32;
+    tm.tm_mday = dayno as i32 + 1;
+    tm.tm_isdst = 0;
+}
+
+fn tm_to_time(tm: &Tm) -> i64 {
+    let mut y = tm.tm_year as i64 + 1900;
+    let mut m = tm.tm_mon as i64 + 1;
+    if m <= 2 {
+        y -= 1;
+        m += 12;
+    }
+    let d = tm.tm_mday as i64;
+    let h = tm.tm_hour as i64;
+    let mi = tm.tm_min as i64;
+    let s = tm.tm_sec as i64;
+    (365 * y + y / 4 - y / 100 + y / 400 + 3 * (m + 1) / 5 + 30 * m + d - 719561) * 86400
+        + 3600 * h
+        + 60 * mi
+        + s
+}
+
+pub(super) fn time_to_local_tm(sec: i64, tm: &mut Tm) {
+    // FIXME: Add timezone logic
+    time_to_tm(sec, tm);
+}
+
+pub(super) fn utc_tm_to_time(tm: &Tm) -> i64 {
+    tm_to_time(tm)
+}
+
+pub(super) fn local_tm_to_time(tm: &Tm) -> i64 {
+    // FIXME: Add timezone logic
+    tm_to_time(tm)
+}