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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:43 +0000 |
commit | 3e3e70d529d8c7d7c4d7bc4fefc9f109393b9245 (patch) | |
tree | daf049b282ab10e8c3d03e409b3cd84ff3f7690c /library/core/src/slice/memchr.rs | |
parent | Adding debian version 1.68.2+dfsg1-1. (diff) | |
download | rustc-3e3e70d529d8c7d7c4d7bc4fefc9f109393b9245.tar.xz rustc-3e3e70d529d8c7d7c4d7bc4fefc9f109393b9245.zip |
Merging upstream version 1.69.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/core/src/slice/memchr.rs')
-rw-r--r-- | library/core/src/slice/memchr.rs | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/library/core/src/slice/memchr.rs b/library/core/src/slice/memchr.rs index c848c2e18..98c8349eb 100644 --- a/library/core/src/slice/memchr.rs +++ b/library/core/src/slice/memchr.rs @@ -16,25 +16,29 @@ const USIZE_BYTES: usize = mem::size_of::<usize>(); /// bytes where the borrow propagated all the way to the most significant /// bit." #[inline] +#[rustc_const_stable(feature = "const_memchr", since = "1.65.0")] const fn contains_zero_byte(x: usize) -> bool { x.wrapping_sub(LO_USIZE) & !x & HI_USIZE != 0 } -#[cfg(target_pointer_width = "16")] #[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 } -#[cfg(not(target_pointer_width = "16"))] #[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`. -#[must_use] #[inline] +#[must_use] +#[rustc_const_stable(feature = "const_memchr", since = "1.65.0")] pub const fn memchr(x: u8, text: &[u8]) -> Option<usize> { // Fast path for small slices. if text.len() < 2 * USIZE_BYTES { @@ -45,6 +49,7 @@ pub const fn memchr(x: u8, text: &[u8]) -> Option<usize> { } #[inline] +#[rustc_const_stable(feature = "const_memchr", since = "1.65.0")] const fn memchr_naive(x: u8, text: &[u8]) -> Option<usize> { let mut i = 0; @@ -60,6 +65,10 @@ const fn memchr_naive(x: u8, text: &[u8]) -> Option<usize> { None } +#[rustc_allow_const_fn_unstable(const_cmp)] +#[rustc_allow_const_fn_unstable(const_slice_index)] +#[rustc_allow_const_fn_unstable(const_align_offset)] +#[rustc_const_stable(feature = "const_memchr", since = "1.65.0")] const fn memchr_aligned(x: u8, text: &[u8]) -> Option<usize> { // Scan for a single byte value by reading two `usize` words at a time. // |