uuid/
rng.rs

1#[cfg(any(feature = "v4", feature = "v7"))]
2pub(crate) fn u128() -> u128 {
3    #[cfg(not(feature = "fast-rng"))]
4    {
5        let mut bytes = [0u8; 16];
6
7        getrandom::getrandom(&mut bytes).unwrap_or_else(|err| {
8            // NB: getrandom::Error has no source; this is adequate display
9            panic!("could not retrieve random bytes for uuid: {}", err)
10        });
11
12        u128::from_ne_bytes(bytes)
13    }
14
15    #[cfg(feature = "fast-rng")]
16    {
17        rand::random()
18    }
19}
20
21#[cfg(any(feature = "v1", feature = "v6"))]
22pub(crate) fn u16() -> u16 {
23    #[cfg(not(feature = "fast-rng"))]
24    {
25        let mut bytes = [0u8; 2];
26
27        getrandom::getrandom(&mut bytes).unwrap_or_else(|err| {
28            // NB: getrandom::Error has no source; this is adequate display
29            panic!("could not retrieve random bytes for uuid: {}", err)
30        });
31
32        u16::from_ne_bytes(bytes)
33    }
34
35    #[cfg(feature = "fast-rng")]
36    {
37        rand::random()
38    }
39}
40
41#[cfg(feature = "v7")]
42pub(crate) fn u64() -> u64 {
43    #[cfg(not(feature = "fast-rng"))]
44    {
45        let mut bytes = [0u8; 8];
46
47        getrandom::getrandom(&mut bytes).unwrap_or_else(|err| {
48            // NB: getrandom::Error has no source; this is adequate display
49            panic!("could not retrieve random bytes for uuid: {}", err)
50        });
51
52        u64::from_ne_bytes(bytes)
53    }
54
55    #[cfg(feature = "fast-rng")]
56    {
57        rand::random()
58    }
59}
uuid/rng.rs

uuid/
rng.rs
