diff options
Diffstat (limited to 'library/core/src/slice/memchr.rs')
| -rw-r--r-- | library/core/src/slice/memchr.rs | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/library/core/src/slice/memchr.rs b/library/core/src/slice/memchr.rs index 3a8b59d727b..da7ceb2dd0a 100644 --- a/library/core/src/slice/memchr.rs +++ b/library/core/src/slice/memchr.rs @@ -20,20 +20,6 @@ const fn contains_zero_byte(x: usize) -> bool { x.wrapping_sub(LO_USIZE) & !x & HI_USIZE != 0 } -#[inline] -#[cfg(target_pointer_width = "16")] -#[rustc_const_stable(feature = "const_memchr", since = "1.65.0")] -const fn repeat_byte(b: u8) -> usize { - (b as usize) << 8 | b as usize -} - -#[inline] -#[cfg(not(target_pointer_width = "16"))] -#[rustc_const_stable(feature = "const_memchr", since = "1.65.0")] -const fn repeat_byte(b: u8) -> usize { - (b as usize) * (usize::MAX / 255) -} - /// Returns the first index matching the byte `x` in `text`. #[inline] #[must_use] @@ -93,7 +79,7 @@ const fn memchr_aligned(x: u8, text: &[u8]) -> Option<usize> { } // search the body of the text - let repeated_x = repeat_byte(x); + let repeated_x = usize::repeat_u8(x); while offset <= len - 2 * USIZE_BYTES { // SAFETY: the while's predicate guarantees a distance of at least 2 * usize_bytes // between the offset and the end of the slice. @@ -149,7 +135,7 @@ pub fn memrchr(x: u8, text: &[u8]) -> Option<usize> { // Search the body of the text, make sure we don't cross min_aligned_offset. // offset is always aligned, so just testing `>` is sufficient and avoids possible // overflow. - let repeated_x = repeat_byte(x); + let repeated_x = usize::repeat_u8(x); let chunk_bytes = mem::size_of::<Chunk>(); while offset > min_aligned_offset { |