1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130

// 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()));
    }
}