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Update shuffling to use new(ish) to_le_bytes fn

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Paul Hauner 2019-05-23 23:21:29 +10:00
parent 92610b4fd3
commit 7bf83a97cf
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GPG Key ID: 5E2CFF9B75FA63DF
1 changed files with 4 additions and 5 deletions
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9
eth2/utils/swap_or_not_shuffle/src/get_permutated_index.rs
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@ -1,8 +1,6 @@
use bytes::Buf;
use hashing::hash; use hashing::hash;
use int_to_bytes::{int_to_bytes1, int_to_bytes4}; use int_to_bytes::{int_to_bytes1, int_to_bytes4};
use std::cmp::max; use std::cmp::max;
use std::io::Cursor;
/// Return `p(index)` in a pseudorandom permutation `p` of `0...list_size-1` with ``seed`` as entropy. /// Return `p(index)` in a pseudorandom permutation `p` of `0...list_size-1` with ``seed`` as entropy.
/// ///
@ -68,9 +66,10 @@ fn hash_with_round(seed: &[u8], round: u8) -> Vec<u8> {
hash(&seed[..]) hash(&seed[..])
} }
fn bytes_to_int64(bytes: &[u8]) -> u64 { fn bytes_to_int64(slice: &[u8]) -> u64 {
let mut cursor = Cursor::new(bytes); let mut bytes = [0; 8];
cursor.get_u64_le() bytes.copy_from_slice(&slice[0..8]);
u64::from_le_bytes(bytes)
} }
#[cfg(test)] #[cfg(test)]