date_differencer/add_diff/
jiff_support.rs

1use core::fmt;
2
3use jiff::{Zoned, civil::DateTime};
4
5use super::{AddDateTimeDiff, AddedDateTimeParts, DateTimeDiff, add_date_time_parts};
6
7#[inline]
8fn jiff_error(args: fmt::Arguments<'_>) -> jiff::Error {
9    jiff::Error::from_args(args)
10}
11
12#[inline]
13fn added_date_time_parts(
14    from: &impl super::DateTimeParts,
15    date_time_diff: &impl DateTimeDiff,
16) -> Result<AddedDateTimeParts, jiff::Error> {
17    add_date_time_parts(from, date_time_diff).ok_or_else(|| {
18        jiff_error(format_args!("date-time addition overflowed before constructing the Jiff value"))
19    })
20}
21
22#[inline]
23fn jiff_year(year: i32) -> Result<i16, jiff::Error> {
24    i16::try_from(year)
25        .map_err(|_| jiff_error(format_args!("date-time year is outside Jiff's supported range")))
26}
27
28impl AddDateTimeDiff for DateTime {
29    type Output = Result<DateTime, jiff::Error>;
30
31    #[inline]
32    fn add_date_time_diff(self, date_time_diff: &impl DateTimeDiff) -> Self::Output {
33        let parts = added_date_time_parts(&self, date_time_diff)?;
34
35        DateTime::new(
36            jiff_year(parts.year)?,
37            parts.month as i8,
38            parts.day as i8,
39            parts.hour as i8,
40            parts.minute as i8,
41            parts.second as i8,
42            parts.nanosecond as i32,
43        )
44    }
45}
46
47impl AddDateTimeDiff for Zoned {
48    type Output = Result<Zoned, jiff::Error>;
49
50    #[inline]
51    fn add_date_time_diff(self, date_time_diff: &impl DateTimeDiff) -> Self::Output {
52        let parts = added_date_time_parts(&self, date_time_diff)?;
53
54        self.with()
55            .year(jiff_year(parts.year)?)
56            .month(parts.month as i8)
57            .day(parts.day as i8)
58            .hour(parts.hour as i8)
59            .minute(parts.minute as i8)
60            .second(parts.second as i8)
61            .subsec_nanosecond(parts.nanosecond as i32)
62            .build()
63    }
64}
date_differencer/add_diff/jiff_support.rs

date_differencer/add_diff/
jiff_support.rs
