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// Copyright 2013 The Servo Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// 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.
//! Core Foundation date objects.
pub use core_foundation_sys::date::*;
use core_foundation_sys::base::kCFAllocatorDefault;
use base::TCFType;
#[cfg(feature = "with-chrono")]
use chrono::NaiveDateTime;
declare_TCFType!{
/// A date.
CFDate, CFDateRef
}
impl_TCFType!(CFDate, CFDateRef, CFDateGetTypeID);
impl_CFTypeDescription!(CFDate);
impl_CFComparison!(CFDate, CFDateCompare);
impl CFDate {
#[inline]
pub fn new(time: CFAbsoluteTime) -> CFDate {
unsafe {
let date_ref = CFDateCreate(kCFAllocatorDefault, time);
TCFType::wrap_under_create_rule(date_ref)
}
}
#[inline]
pub fn now() -> CFDate {
CFDate::new(unsafe { CFAbsoluteTimeGetCurrent() })
}
#[inline]
pub fn abs_time(&self) -> CFAbsoluteTime {
unsafe {
CFDateGetAbsoluteTime(self.0)
}
}
#[cfg(feature = "with-chrono")]
pub fn naive_utc(&self) -> NaiveDateTime {
let ts = unsafe {
self.abs_time() + kCFAbsoluteTimeIntervalSince1970
};
let (secs, nanos) = if ts.is_sign_positive() {
(ts.trunc() as i64, ts.fract())
} else {
// nanoseconds can't be negative in NaiveDateTime
(ts.trunc() as i64 - 1, 1.0 - ts.fract().abs())
};
NaiveDateTime::from_timestamp(secs, (nanos * 1e9).floor() as u32)
}
#[cfg(feature = "with-chrono")]
pub fn from_naive_utc(time: NaiveDateTime) -> CFDate {
let secs = time.timestamp();
let nanos = time.timestamp_subsec_nanos();
let ts = unsafe {
secs as f64 + (nanos as f64 / 1e9) - kCFAbsoluteTimeIntervalSince1970
};
CFDate::new(ts)
}
}
#[cfg(test)]
mod test {
use super::CFDate;
use std::cmp::Ordering;
#[cfg(feature = "with-chrono")]
use chrono::NaiveDateTime;
#[cfg(feature = "with-chrono")]
fn approx_eq(a: f64, b: f64) -> bool {
use std::f64;
let same_sign = a.is_sign_positive() == b.is_sign_positive();
let equal = ((a - b).abs() / f64::min(a.abs() + b.abs(), f64::MAX)) < f64::EPSILON;
(same_sign && equal)
}
#[test]
fn date_comparison() {
let now = CFDate::now();
let past = CFDate::new(now.abs_time() - 1.0);
assert_eq!(now.cmp(&past), Ordering::Greater);
assert_eq!(now.cmp(&now), Ordering::Equal);
assert_eq!(past.cmp(&now), Ordering::Less);
}
#[test]
fn date_equality() {
let now = CFDate::now();
let same_time = CFDate::new(now.abs_time());
assert_eq!(now, same_time);
}
#[test]
#[cfg(feature = "with-chrono")]
fn date_chrono_conversion_positive() {
let date = CFDate::now();
let datetime = date.naive_utc();
let converted = CFDate::from_naive_utc(datetime);
assert!(approx_eq(date.abs_time(), converted.abs_time()));
}
#[test]
#[cfg(feature = "with-chrono")]
fn date_chrono_conversion_negative() {
use super::kCFAbsoluteTimeIntervalSince1970;
let ts = unsafe {
kCFAbsoluteTimeIntervalSince1970 - 420.0
};
let date = CFDate::new(ts);
let datetime: NaiveDateTime = date.naive_utc();
let converted = CFDate::from_naive_utc(datetime);
assert!(approx_eq(date.abs_time(), converted.abs_time()));
}
}
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