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rust-bitcoin-unsafe-fast
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Update big int from_be_bytes with iterators 

Co-authored-by: Sebastian <geisler.sebastian@googlemail.com>
This commit is contained in:
Dr. Maxim Orlovsky 2020-09-03 16:42:00 +02:00 committed by GitHub
parent 2fd353d5ab
commit 42bf893d8b
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1 changed files with 4 additions and 3 deletions
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7
src/util/uint.rs
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@ -92,9 +92,10 @@ macro_rules! construct_uint {
pub fn from_be_bytes(bytes: [u8; $n_words * 8]) -> $name {
use super::endian::slice_to_u64_be;
let mut slice = [0u64; $n_words];
for n in 0..$n_words {
slice[$n_words - n - 1] = slice_to_u64_be(&bytes[(n * 8)..(n * 8 + 8)]);
}
slice.iter_mut()
.rev()
.zip(bytes.chunks(8))
.for_each(|(word, bytes)| *word = slice_to_u64_be(bytes));
$name(slice)
}