tubes/
uuid.rs

1use std::{
2    fmt::Display,
3    time::{Duration, SystemTime},
4};
5
6#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
7pub struct Uuid(pub u128);
8
9impl Uuid {
10    pub(crate) fn new_v4() -> Self {
11        let d1 = SystemTime::now()
12            .duration_since(SystemTime::UNIX_EPOCH)
13            .unwrap_or(Duration::from_secs(1));
14        let d2 = SystemTime::now()
15            .duration_since(SystemTime::UNIX_EPOCH)
16            .unwrap_or(Duration::from_secs(1));
17        let m = d2.saturating_sub(d1).as_nanos();
18        let d1 = d1.as_nanos().wrapping_mul(17).wrapping_mul(m);
19        let d2 = d2.as_nanos().wrapping_mul(29).wrapping_mul(m);
20        let r = ((d1 << 64) | d2).wrapping_mul(m);
21        Self(r ^ d1 ^ d2)
22    }
23
24    pub(crate) fn from_u128(value: u128) -> Self {
25        Self(value)
26    }
27
28    pub(crate) fn as_u128(&self) -> u128 {
29        self.0
30    }
31}
32
33impl Display for Uuid {
34    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
35        let bytes: [u8; 16] = u128::to_ne_bytes(self.0);
36        for b in bytes {
37            write!(f, "{:02x}", b)?;
38        }
39        Ok(())
40    }
41}
tubes/uuid.rs

tubes/
uuid.rs
