Struct apache_avro::rabin::Rabin

pub struct Rabin { /* private fields */ }

Implementation of the Rabin fingerprint algorithm using the Digest trait as described in schema_fingerprints.

The digest is returned as the 8-byte little-endian encoding of the Rabin hash. This is what is used for avro single object encoding

use apache_avro::rabin::Rabin;
use digest::Digest;
use hex_literal::hex;

// create the Rabin hasher
let mut hasher = Rabin::new();

// add the data
hasher.update(b"hello world");

// read hash digest and consume hasher
let result = hasher.finalize();

assert_eq!(result[..], hex!("60335ba6d0415528"));

To convert the digest to the commonly used 64-bit integer value, you can use the byteorder crate:

use byteorder::{ByteOrder, LittleEndian};

let i = LittleEndian::read_i64(&result.to_vec());

assert_eq!(i, 2906301498937520992)

Trait Implementations

impl Clone for Rabin

fn clone(&self) -> Rabin

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Rabin

fn default() -> Self

Returns the “default value” for a type.

impl FixedOutput for Rabin

fn finalize_into(self, out: &mut GenericArray<u8, Self::OutputSize>)

Consume value and write result into provided array.

fn finalize_fixed(self) -> GenericArray<u8, Self::OutputSize>

Retrieve result and consume the hasher instance.

impl FixedOutputReset for Rabin

fn finalize_into_reset(&mut self, out: &mut Output<Self>)

Write result into provided array and reset the hasher state.

fn finalize_fixed_reset(&mut self) -> GenericArray<u8, Self::OutputSize>

Retrieve result and reset the hasher state.

impl OutputSizeUser for Rabin

type OutputSize = UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>

Size of the output in bytes.

fn output_size() -> usize

Return output size in bytes.

impl Reset for Rabin

fn reset(&mut self)

Reset state to its initial value.

impl Update for Rabin

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

Update state using the provided data.

fn chain(self, data: impl AsRef<[u8]>) -> Self

Digest input data in a chained manner.

impl HashMarker for Rabin