1 files changed, 278 insertions, 0 deletions
diff --git a/vendor/chrono/src/offset/local/windows.rs b/vendor/chrono/src/offset/local/windows.rs
new file mode 100644
index 000000000..e6415015c
--- /dev/null
+++ b/vendor/chrono/src/offset/local/windows.rs
@@ -0,0 +1,278 @@
+// 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::io;
+use std::mem;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use winapi::shared::minwindef::*;
+use winapi::um::minwinbase::SYSTEMTIME;
+use winapi::um::timezoneapi::*;
+
+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`.
+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;
+
+    // #TODO - there should be ambiguous cases, investigate?
+    LocalResult::Single(tm_to_datetime(tm))
+}
+
+/// Converts a `time::Tm` struct into the timezone-aware `DateTime`.
+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_ymd_opt(tm.tm_year + 1900, tm.tm_mon as u32 + 1, tm.tm_mday as u32)
+        .unwrap();
+    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)]
+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,
+}
+
+const HECTONANOSECS_IN_SEC: i64 = 10_000_000;
+const HECTONANOSEC_TO_UNIX_EPOCH: i64 = 11_644_473_600 * HECTONANOSECS_IN_SEC;
+
+fn time_to_file_time(sec: i64) -> FILETIME {
+    let t = ((sec * HECTONANOSECS_IN_SEC) + HECTONANOSEC_TO_UNIX_EPOCH) as u64;
+    FILETIME { dwLowDateTime: t as DWORD, dwHighDateTime: (t >> 32) as DWORD }
+}
+
+fn file_time_as_u64(ft: &FILETIME) -> u64 {
+    ((ft.dwHighDateTime as u64) << 32) | (ft.dwLowDateTime as u64)
+}
+
+fn file_time_to_unix_seconds(ft: &FILETIME) -> i64 {
+    let t = file_time_as_u64(ft) as i64;
+    ((t - HECTONANOSEC_TO_UNIX_EPOCH) / HECTONANOSECS_IN_SEC) as i64
+}
+
+fn system_time_to_file_time(sys: &SYSTEMTIME) -> FILETIME {
+    unsafe {
+        let mut ft = mem::zeroed();
+        SystemTimeToFileTime(sys, &mut ft);
+        ft
+    }
+}
+
+fn tm_to_system_time(tm: &Tm) -> SYSTEMTIME {
+    let mut sys: SYSTEMTIME = unsafe { mem::zeroed() };
+    sys.wSecond = tm.tm_sec as WORD;
+    sys.wMinute = tm.tm_min as WORD;
+    sys.wHour = tm.tm_hour as WORD;
+    sys.wDay = tm.tm_mday as WORD;
+    sys.wDayOfWeek = tm.tm_wday as WORD;
+    sys.wMonth = (tm.tm_mon + 1) as WORD;
+    sys.wYear = (tm.tm_year + 1900) as WORD;
+    sys
+}
+
+fn system_time_to_tm(sys: &SYSTEMTIME, tm: &mut Tm) {
+    tm.tm_sec = sys.wSecond as i32;
+    tm.tm_min = sys.wMinute as i32;
+    tm.tm_hour = sys.wHour as i32;
+    tm.tm_mday = sys.wDay as i32;
+    tm.tm_wday = sys.wDayOfWeek as i32;
+    tm.tm_mon = (sys.wMonth - 1) as i32;
+    tm.tm_year = (sys.wYear - 1900) as i32;
+    tm.tm_yday = yday(tm.tm_year, tm.tm_mon + 1, tm.tm_mday);
+
+    fn yday(year: i32, month: i32, day: i32) -> i32 {
+        let leap = if month > 2 {
+            if year % 4 == 0 {
+                1
+            } else {
+                2
+            }
+        } else {
+            0
+        };
+        let july = if month > 7 { 1 } else { 0 };
+
+        (month - 1) * 30 + month / 2 + (day - 1) - leap + july
+    }
+}
+
+macro_rules! call {
+    ($name:ident($($arg:expr),*)) => {
+        if $name($($arg),*) == 0 {
+            panic!(concat!(stringify!($name), " failed with: {}"),
+                    io::Error::last_os_error());
+        }
+    }
+}
+
+fn time_to_local_tm(sec: i64, tm: &mut Tm) {
+    let ft = time_to_file_time(sec);
+    unsafe {
+        let mut utc = mem::zeroed();
+        let mut local = mem::zeroed();
+        call!(FileTimeToSystemTime(&ft, &mut utc));
+        call!(SystemTimeToTzSpecificLocalTime(0 as *const _, &mut utc, &mut local));
+        system_time_to_tm(&local, tm);
+
+        let local = system_time_to_file_time(&local);
+        let local_sec = file_time_to_unix_seconds(&local);
+
+        let mut tz = mem::zeroed();
+        GetTimeZoneInformation(&mut tz);
+
+        // SystemTimeToTzSpecificLocalTime already applied the biases so
+        // check if it non standard
+        tm.tm_utcoff = (local_sec - sec) as i32;
+        tm.tm_isdst = if tm.tm_utcoff == -60 * (tz.Bias + tz.StandardBias) { 0 } else { 1 };
+    }
+}
+
+fn utc_tm_to_time(tm: &Tm) -> i64 {
+    unsafe {
+        let mut ft = mem::zeroed();
+        let sys_time = tm_to_system_time(tm);
+        call!(SystemTimeToFileTime(&sys_time, &mut ft));
+        file_time_to_unix_seconds(&ft)
+    }
+}
+
+fn local_tm_to_time(tm: &Tm) -> i64 {
+    unsafe {
+        let mut ft = mem::zeroed();
+        let mut utc = mem::zeroed();
+        let mut sys_time = tm_to_system_time(tm);
+        call!(TzSpecificLocalTimeToSystemTime(0 as *mut _, &mut sys_time, &mut utc));
+        call!(SystemTimeToFileTime(&utc, &mut ft));
+        file_time_to_unix_seconds(&ft)
+    }
+}