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clippy warnings

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This commit is contained in:
Nikolay Kim 2018-07-12 10:41:49 +06:00
parent 8e462c5944
commit db005af1af
1 changed files with 6 additions and 6 deletions
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12
src/ws/mask.rs
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@ -1,7 +1,7 @@
//! This is code from [Tungstenite project](https://github.com/snapview/tungstenite-rs)
#![cfg_attr(feature = "cargo-clippy", allow(cast_ptr_alignment))]
use std::slice;
use std::ptr::copy_nonoverlapping;
use std::slice;
// Holds a slice guaranteed to be shorter than 8 bytes
struct ShortSlice<'a>(&'a mut [u8]);
@ -50,6 +50,7 @@ pub(crate) fn apply_mask(buf: &mut [u8], mask_u32: u32) {
// TODO: copy_nonoverlapping here compiles to call memcpy. While it is not so
// inefficient, it could be done better. The compiler does not understand that
// a `ShortSlice` must be smaller than a u64.
#[cfg_attr(feature = "cargo-clippy", allow(needless_pass_by_value))]
fn xor_short(buf: ShortSlice, mask: u64) {
// Unsafe: we know that a `ShortSlice` fits in a u64
unsafe {
@ -67,8 +68,8 @@ fn xor_short(buf: ShortSlice, mask: u64) {
// Unsafe: caller must ensure the buffer has the correct size and alignment
unsafe fn cast_slice(buf: &mut [u8]) -> &mut [u64] {
// Assert correct size and alignment in debug builds
debug_assert!(buf.len() & 0x7 == 0);
debug_assert!(buf.as_ptr() as usize & 0x7 == 0);
debug_assert!(buf.len().trailing_zeros() >= 3);
debug_assert!((buf.as_ptr() as usize).trailing_zeros() >= 3);
slice::from_raw_parts_mut(buf.as_mut_ptr() as *mut u64, buf.len() >> 3)
}
@ -81,10 +82,10 @@ fn align_buf(buf: &mut [u8]) -> (ShortSlice, &mut [u64], ShortSlice) {
let end_ptr = start_ptr + buf.len();
// Round *up* to next aligned boundary for start
let start_aligned = (start_ptr+7) & !0x7;
let start_aligned = (start_ptr + 7) & !0x7;
// Round *down* to last aligned boundary for end
let end_aligned = end_ptr & !0x7;
if end_aligned >= start_aligned {
// We have our three segments (head, mid, tail)
let (tmp, tail) = buf.split_at_mut(end_aligned - start_ptr);
@ -101,7 +102,6 @@ fn align_buf(buf: &mut [u8]) -> (ShortSlice, &mut [u64], ShortSlice) {
}
}
#[cfg(test)]
mod tests {
use super::apply_mask;