Struct aho_corasick::packed::pattern::Pattern

pub(crate) struct Pattern<'a>(&'a [u8]);

A pattern that is used in packed searching.

Tuple Fields

0: &'a [u8]

Implementations

impl<'p> Pattern<'p>

pub(crate) fn len(&self) -> usize

Returns the length of this pattern, in bytes.

pub(crate) fn bytes(&self) -> &[u8]

Returns the bytes of this pattern.

pub(crate) fn low_nybbles(&self, len: usize) -> Box<[u8]>

Returns the first len low nybbles from this pattern. If this pattern is shorter than len, then this panics.

pub(crate) fn is_prefix(&self, bytes: &[u8]) -> bool

Returns true if this pattern is a prefix of the given bytes.

pub(crate) unsafe fn is_prefix_raw( &self, start: *const u8, end: *const u8, ) -> bool

Returns true if this pattern is a prefix of the haystack given by the raw start and end pointers.

Safety

• It must be the case that start < end and that the distance between them is at least equal to V::BYTES. That is, it must always be valid to do at least an unaligned load of V at start.
• Both start and end must be valid for reads.
• Both start and end must point to an initialized value.
• Both start and end must point to the same allocated object and must either be in bounds or at most one byte past the end of the allocated object.
• Both start and end must be derived from a pointer to the same object.
• The distance between start and end must not overflow isize.
• The distance being in bounds must not rely on “wrapping around” the address space.

Trait Implementations

impl<'a> Clone for Pattern<'a>

fn clone(&self) -> Pattern<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for Pattern<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.