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Remove a couple of unnecessary transmute() (#8736)

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This commit is contained in:
Niklas Adolfsson
2018-05-31 13:39:25 +02:00
committed by Afri Schoedon
parent 118588ef6c
commit 1020560af6
2 changed files with 9 additions and 13 deletions
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17
util/plain_hasher/src/lib.rs
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@@ -2,9 +2,9 @@
extern crate crunchy;
extern crate ethereum_types;
use std::{hash, mem};
use std::collections::{HashMap, HashSet};
use ethereum_types::H256;
use std::collections::{HashMap, HashSet};
use std::hash;
/// Specialized version of `HashMap` with H256 keys and fast hashing function.
pub type H256FastMap<T> = HashMap<H256, T, hash::BuildHasherDefault<PlainHasher>>;
@@ -28,16 +28,13 @@ impl hash::Hasher for PlainHasher {
#[allow(unused_assignments)]
fn write(&mut self, bytes: &[u8]) {
debug_assert!(bytes.len() == 32);
let mut bytes_ptr = bytes.as_ptr();
let mut prefix_ptr = &mut self.prefix as *mut u64 as *mut u8;
unsafe {
let mut bytes_ptr = bytes.as_ptr();
let prefix_u8: &mut [u8; 8] = mem::transmute(&mut self.prefix);
let mut prefix_ptr = prefix_u8.as_mut_ptr();
unroll! {
for _i in 0..8 {
unroll! {
for _i in 0..8 {
unsafe {
*prefix_ptr ^= (*bytes_ptr ^ *bytes_ptr.offset(8)) ^ (*bytes_ptr.offset(16) ^ *bytes_ptr.offset(24));
bytes_ptr = bytes_ptr.offset(1);
prefix_ptr = prefix_ptr.offset(1);
}