66 lines
1.7 KiB
Rust
66 lines
1.7 KiB
Rust
use std::str::FromStr;
|
|
use std::time::{SystemTime, UNIX_EPOCH};
|
|
|
|
use rand::prelude::*;
|
|
|
|
/// Returns milliseconds since UNIX Epoch
|
|
pub fn now_msec() -> u64 {
|
|
SystemTime::now()
|
|
.duration_since(UNIX_EPOCH)
|
|
.expect("Fix your clock :o")
|
|
.as_millis() as u64
|
|
}
|
|
|
|
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug)]
|
|
pub struct Timestamp {
|
|
pub msec: u64,
|
|
pub rand: u64,
|
|
}
|
|
|
|
impl Timestamp {
|
|
#[allow(dead_code)]
|
|
// 2023-05-15 try to make clippy happy and not sure if this fn will be used in the future.
|
|
pub fn now() -> Self {
|
|
let mut rng = thread_rng();
|
|
Self {
|
|
msec: now_msec(),
|
|
rand: rng.gen::<u64>(),
|
|
}
|
|
}
|
|
|
|
pub fn after(other: &Self) -> Self {
|
|
let mut rng = thread_rng();
|
|
Self {
|
|
msec: std::cmp::max(now_msec(), other.msec + 1),
|
|
rand: rng.gen::<u64>(),
|
|
}
|
|
}
|
|
|
|
pub fn zero() -> Self {
|
|
Self { msec: 0, rand: 0 }
|
|
}
|
|
}
|
|
|
|
impl ToString for Timestamp {
|
|
fn to_string(&self) -> String {
|
|
let mut bytes = [0u8; 16];
|
|
bytes[0..8].copy_from_slice(&u64::to_be_bytes(self.msec));
|
|
bytes[8..16].copy_from_slice(&u64::to_be_bytes(self.rand));
|
|
hex::encode(bytes)
|
|
}
|
|
}
|
|
|
|
impl FromStr for Timestamp {
|
|
type Err = &'static str;
|
|
|
|
fn from_str(s: &str) -> Result<Timestamp, &'static str> {
|
|
let bytes = hex::decode(s).map_err(|_| "invalid hex")?;
|
|
if bytes.len() != 16 {
|
|
return Err("bad length");
|
|
}
|
|
Ok(Self {
|
|
msec: u64::from_be_bytes(bytes[0..8].try_into().unwrap()),
|
|
rand: u64::from_be_bytes(bytes[8..16].try_into().unwrap()),
|
|
})
|
|
}
|
|
}
|