azalea_buf/
serializable_uuid.rs

1use std::io::{self, Cursor, Write};
2
3use uuid::Uuid;
4
5use crate::{AzBuf, BufReadError};
6
7pub trait SerializableUuid {
8    fn to_int_array(&self) -> [u32; 4];
9    fn from_int_array(array: [u32; 4]) -> Self;
10}
11
12fn least_most_to_int_array(most: u64, least: u64) -> [u32; 4] {
13    [
14        (most >> 32) as u32,
15        most as u32,
16        (least >> 32) as u32,
17        least as u32,
18    ]
19}
20
21impl SerializableUuid for Uuid {
22    fn to_int_array(&self) -> [u32; 4] {
23        let most_significant_bits = (self.as_u128() >> 64) as u64;
24        let least_significant_bits = (self.as_u128() & 0xffffffffffffffff) as u64;
25
26        least_most_to_int_array(most_significant_bits, least_significant_bits)
27    }
28
29    fn from_int_array(array: [u32; 4]) -> Self {
30        let most = ((array[0] as u64) << 32) | ((array[1] as u64) & 0xFFFFFFFF);
31        let least = ((array[2] as u64) << 32) | ((array[3] as u64) & 0xFFFFFFFF);
32
33        Uuid::from_u128(((most as u128) << 64) | least as u128)
34    }
35}
36
37impl AzBuf for Uuid {
38    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
39        Ok(Uuid::from_int_array([
40            u32::azalea_read(buf)?,
41            u32::azalea_read(buf)?,
42            u32::azalea_read(buf)?,
43            u32::azalea_read(buf)?,
44        ]))
45    }
46    fn azalea_write(&self, buf: &mut impl Write) -> io::Result<()> {
47        let [a, b, c, d] = self.to_int_array();
48        a.azalea_write(buf)?;
49        b.azalea_write(buf)?;
50        c.azalea_write(buf)?;
51        d.azalea_write(buf)?;
52        Ok(())
53    }
54}
55
56#[cfg(test)]
57mod tests {
58    use super::*;
59
60    #[test]
61    fn to_int_array() {
62        let u = Uuid::parse_str("6536bfed-8695-48fd-83a1-ecd24cf2a0fd").unwrap();
63        assert_eq!(
64            u.to_int_array(),
65            [0x6536bfed, 0x869548fd, 0x83a1ecd2, 0x4cf2a0fd]
66        );
67    }
68
69    #[test]
70    fn from_int_array() {
71        let u = Uuid::from_int_array([0x6536bfed, 0x869548fd, 0x83a1ecd2, 0x4cf2a0fd]);
72        assert_eq!(u.to_string(), "6536bfed-8695-48fd-83a1-ecd24cf2a0fd");
73    }
74
75    #[test]
76    fn read_write() {
77        let u = Uuid::parse_str("6536bfed-8695-48fd-83a1-ecd24cf2a0fd").unwrap();
78        let mut buf = Vec::new();
79        u.azalea_write(&mut buf).unwrap();
80        println!("{buf:?}");
81        assert_eq!(buf.len(), 16);
82        let u2 = Uuid::azalea_read(&mut Cursor::new(&buf)).unwrap();
83        assert_eq!(u, u2);
84    }
85}
azalea_buf/serializable_uuid.rs

azalea_buf/
serializable_uuid.rs
