Struct HasherPengy

pub struct HasherPengy { /* private fields */ }

Available on crate feature hash only.

A fast 64-bit non-cryptographic hash algorithm

Derived work

This is derived work from the pengyhash v0.2 algorithm, including the following modifications:

• make it a struct implementing Hasher.
• make the algorithm const.
• make the seed 64-bit.
• add extra methods.

Implementations

impl HasherPengy

pub const fn new() -> Self

Returns a default pengy hasher.

pub const fn with_seed(seed: u64) -> Self

Returns a new pengy hasher with the given seed.

pub const fn is_empty(&self) -> bool

Checks whether the current state is uninitialized (or unchanged from default).

pub const fn reset(&mut self)

Resets the internal state to its initial default values without changing the seed.

pub const fn clear(&mut self)

Resets both the state and seed for full reinitialization.

pub const fn process(&mut self, data: &[u8])

Processes the given data slice, updating the internal state.

pub const fn digest(&self) -> u64

Produces the final hash value based on the internal state.

Trait Implementations

impl ConstDefault for HasherPengy

const DEFAULT: Self

Returns the compile-time “default value” for a type.

impl Default for HasherPengy

fn default() -> Self

Returns the “default value” for a type.

impl Hasher for HasherPengy

fn write(&mut self, data: &[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.