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use uuid::Uuid;
pub trait SerializableUuid {
fn to_int_array(&self) -> [u32; 4];
fn from_int_array(array: [u32; 4]) -> Self;
}
fn least_most_to_int_array(most: u64, least: u64) -> [u32; 4] {
[
(most >> 32) as u32,
most as u32,
(least >> 32) as u32,
least as u32,
]
}
impl SerializableUuid for Uuid {
fn to_int_array(&self) -> [u32; 4] {
let most_significant_bits = (self.as_u128() >> 64) as u64;
let least_significant_bits = (self.as_u128() & 0xffffffffffffffff) as u64;
least_most_to_int_array(most_significant_bits, least_significant_bits)
}
fn from_int_array(array: [u32; 4]) -> Self {
let most = ((array[0] as u64) << 32) | ((array[1] as u64) & 0xFFFFFFFF);
let least = ((array[2] as u64) << 32) | ((array[3] as u64) & 0xFFFFFFFF);
Uuid::from_u128(((most as u128) << 64) | least as u128)
}
}
#[cfg(tests)]
mod tests {
use super::*;
#[test]
fn to_int_array() {
let u = Uuid::parse_str("6536bfed-8695-48fd-83a1-ecd24cf2a0fd").unwrap();
assert_eq!(
u.to_int_array(),
[0x6536bfed, 0x869548fd, 0x83a1ecd2, 0x4cf2a0fd]
);
}
#[test]
fn from_int_array() {
let u = Uuid::from_int_array([0x6536bfed, 0x869548fd, 0x83a1ecd2, 0x4cf2a0fd]);
assert_eq!(u.to_string(), "6536bfed-8695-48fd-83a1-ecd24cf2a0fd");
}
}
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