axhash_core/hash/
hasher_impl.rs

1use super::AxHasher;
2
3use crate::bytes::hash_bytes_core;
4use crate::constants::SECRET;
5use crate::math::{avalanche, folded_multiply};
6
7use core::hash::Hasher;
8
9impl Hasher for AxHasher {
10    #[inline(always)]
11    fn finish(&self) -> u64 {
12        // Compute the post-flush accumulator without mutating self.
13        // Avoids a 24-byte clone on every HashMap lookup/insert.
14        let final_acc = if self.sponge_bits == 0 {
15            self.acc
16        } else {
17            let lo = self.sponge as u64;
18            let hi = (self.sponge >> 64) as u64;
19            folded_multiply(lo ^ self.acc, hi ^ SECRET[1])
20        };
21        avalanche(final_acc)
22    }
23
24    #[inline(always)]
25    fn write(&mut self, bytes: &[u8]) {
26        self.flush_sponge();
27        self.acc = hash_bytes_core(bytes, self.acc);
28    }
29
30    #[inline(always)]
31    fn write_u8(&mut self, i: u8) {
32        self.push_num(i, 8);
33    }
34
35    #[inline(always)]
36    fn write_u16(&mut self, i: u16) {
37        self.push_num(i, 16);
38    }
39
40    #[inline(always)]
41    fn write_u32(&mut self, i: u32) {
42        self.push_num(i, 32);
43    }
44
45    #[inline(always)]
46    fn write_u64(&mut self, i: u64) {
47        self.push_num(i, 64);
48    }
49
50    #[inline(always)]
51    fn write_u128(&mut self, i: u128) {
52        self.flush_sponge();
53        let lo = i as u64;
54        let hi = (i >> 64) as u64;
55        self.acc = folded_multiply(lo ^ self.acc, hi ^ SECRET[1]);
56    }
57
58    #[inline(always)]
59    fn write_usize(&mut self, i: usize) {
60        #[cfg(target_pointer_width = "32")]
61        self.write_u32(i as u32);
62        #[cfg(target_pointer_width = "64")]
63        self.write_u64(i as u64);
64    }
65
66    #[inline(always)]
67    fn write_i8(&mut self, i: i8) {
68        self.write_u8(i as u8);
69    }
70
71    #[inline(always)]
72    fn write_i16(&mut self, i: i16) {
73        self.write_u16(i as u16);
74    }
75
76    #[inline(always)]
77    fn write_i32(&mut self, i: i32) {
78        self.write_u32(i as u32);
79    }
80
81    #[inline(always)]
82    fn write_i64(&mut self, i: i64) {
83        self.write_u64(i as u64);
84    }
85
86    #[inline(always)]
87    fn write_i128(&mut self, i: i128) {
88        self.write_u128(i as u128);
89    }
90
91    #[inline(always)]
92    fn write_isize(&mut self, i: isize) {
93        self.write_usize(i as usize);
94    }
95}
axhash_core/hash/hasher_impl.rs

axhash_core/hash/
hasher_impl.rs
