Method checked_add

src/timespec.rs:106–121

Checked `Timespec` addition. Returns `None` if overflow occurred. # Panics If `0 <= .tv_nsec < 1_000_000_000` doesn't hold, this function may panic or return unexpected results. # Example ``` use rustix::event::Timespec; assert_eq!( Timespec { tv_sec: 1, tv_nsec: 2 } .checked_add(Timespec { tv_sec: 30, tv_nsec: 40 }), Some(Timespec { tv_sec: 31, tv_nsec: 42 }) ); assert_eq!( Timespec { tv_sec

(self, rhs: Self)

    /// );
    /// ```
    pub const fn checked_add(self, rhs: Self) -> Option<Self> {
        if let Some(mut tv_sec) = self.tv_sec.checked_add(rhs.tv_sec) {
            let mut tv_nsec = self.tv_nsec + rhs.tv_nsec;
            if tv_nsec >= 1_000_000_000 {
                tv_nsec -= 1_000_000_000;
                if let Some(carried_sec) = tv_sec.checked_add(1) {
                    tv_sec = carried_sec;
                } else {
                    return None;
                }
            }
            Some(Self { tv_sec, tv_nsec })
        } else {
            None
        }
    }

    /// Checked `Timespec` subtraction. Returns `None` if overflow occurred.
    ///