Struct HighwayHasher

pub struct HighwayHasher { /* private fields */ }

HighwayHash implementation that selects best hash implementation at runtime.

Implementations

impl HighwayHasher

pub fn new(key: Key) -> Self

Creates a new hasher based on compilation and runtime capabilities

pub fn from_checkpoint(data: [u8; 164]) -> Self

Creates a new hasher based on compilation and runtime capabilities

Trait Implementations

impl Clone for HighwayHasher

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HighwayHasher

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

Formats the value using the given formatter.

impl Default for HighwayHasher

fn default() -> Self

Returns the “default value” for a type.

impl Hasher for HighwayHasher

fn write(&mut self, bytes: &[u8])

Writes some data into this Hasher.

fn finish(&self) -> u64

Returns the hash value for the values written so far.

fn write_u8(&mut self, i: u8)

Writes a single u8 into this hasher.

fn write_u16(&mut self, i: u16)

Writes a single u16 into this hasher.

fn write_u32(&mut self, i: u32)

Writes a single u32 into this hasher.

fn write_u64(&mut self, i: u64)

Writes a single u64 into this hasher.

fn write_u128(&mut self, i: u128)

Writes a single u128 into this hasher.

fn write_usize(&mut self, i: usize)

Writes a single usize into this hasher.

fn write_i8(&mut self, i: i8)

Writes a single i8 into this hasher.

fn write_i16(&mut self, i: i16)

Writes a single i16 into this hasher.

fn write_i32(&mut self, i: i32)

Writes a single i32 into this hasher.

fn write_i64(&mut self, i: i64)

Writes a single i64 into this hasher.

fn write_i128(&mut self, i: i128)

Writes a single i128 into this hasher.

fn write_isize(&mut self, i: isize)

Writes a single isize into this hasher.

fn write_length_prefix(&mut self, len: usize)

🔬This is a nightly-only experimental API. (hasher_prefixfree_extras)

Writes a length prefix into this hasher, as part of being prefix-free.

fn write_str(&mut self, s: &str)

🔬This is a nightly-only experimental API. (hasher_prefixfree_extras)

Writes a single str into this hasher.

impl HighwayHash for HighwayHasher

fn append(&mut self, data: &[u8])

Adds data to be hashed. If it is important, the performance characteristics of this function differs depending on the amount of data previously hashed and the amount of data to be hashed. For instance, if one appends 50, 1 byte slices then appending the 32nd byte will have a performance outlier as the internal 32 byte block is complete and internally processed.

fn finalize64(self) -> u64

Consumes the hasher to return the 64bit hash

fn finalize128(self) -> [u64; 2]

Consumes the hasher to return the 128bit hash

fn finalize256(self) -> [u64; 4]

Consumes the hasher to return the 256bit hash

fn checkpoint(&self) -> [u8; 164]

Serialize the hasher state to be persisted or resumed by another hasher

fn hash64(self, data: &[u8]) -> u64

Convenience function for hashing all data in a single call and receiving a 64bit hash. Results are equivalent to appending the data manually.

fn hash128(self, data: &[u8]) -> [u64; 2]

Convenience function for hashing all data in a single call and receiving a 128bit hash. Results are equivalent to appending the data manually.

fn hash256(self, data: &[u8]) -> [u64; 4]

Convenience function for hashing all data in a single call and receiving a 256bit hash. Results are equivalent to appending the data manually.

impl Write for HighwayHasher

fn write(&mut self, bytes: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.