Struct Hasher 

pub struct Hasher { /* private fields */ }

Represents an in-progress CRC32 computation.

Implementations

impl Hasher

pub fn new() -> Self

Create a new Hasher.

This will perform a CPU feature detection at runtime to select the most optimal implementation for the current processor architecture.

pub fn new_with_initial(init: u32) -> Self

Create a new Hasher with an initial CRC32 state.

This works just like Hasher::new, except that it allows for an initial CRC32 state to be passed in.

pub fn new_with_initial_len(init: u32, amount: u64) -> Self

Create a new Hasher with an initial CRC32 state.

As new_with_initial, but also accepts a length (in bytes). The resulting object can then be used with combine to compute crc(a || b) from crc(a), crc(b), and len(b).

pub fn update(&mut self, buf: &[u8])

Process the given byte slice and update the hash state.

pub fn finalize(self) -> u32

Finalize the hash state and return the computed CRC32 value.

pub fn reset(&mut self)

Reset the hash state.

pub fn combine(&mut self, other: &Self)

Combine the hash state with the hash state for the subsequent block of bytes.

Trait Implementations

impl Clone for Hasher

fn clone(&self) -> Hasher

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Hasher

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

Formats the value using the given formatter.

impl Default for Hasher

fn default() -> Self

Returns the “default value” for a type.

impl Hasher for Hasher

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.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes