ens-normalize 0.1.1

Rust port of adraffy's ENS normalizer
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

use std::collections::{HashMap, HashSet};
use std::hash::{BuildHasherDefault, Hasher};

#[derive(Default)]
pub(crate) struct IntHasher(u64);

impl Hasher for IntHasher {
    fn write(&mut self, bytes: &[u8]) {
        let mut hash = 0xcbf2_9ce4_8422_2325u64;
        for &byte in bytes {
            hash ^= u64::from(byte);
            hash = hash.wrapping_mul(0x0000_0100_0000_01B3);
        }
        self.0 = hash;
    }

    fn write_u32(&mut self, i: u32) {
        self.0 = u64::from(i);
    }

    fn write_u64(&mut self, i: u64) {
        self.0 = i;
    }

    fn write_usize(&mut self, i: usize) {
        self.0 = i as u64;
    }

    fn finish(&self) -> u64 {
        let mut x = self.0;
        x ^= x >> 30;
        x = x.wrapping_mul(0xbf58_476d_1ce4_e5b9);
        x ^= x >> 27;
        x = x.wrapping_mul(0x94d0_49bb_1331_11eb);
        x ^ (x >> 31)
    }
}

pub(crate) type IntMap<K, V> = HashMap<K, V, BuildHasherDefault<IntHasher>>;
pub(crate) type IntSet<T> = HashSet<T, BuildHasherDefault<IntHasher>>;