Struct PartialFNVHash 

pub struct PartialFNVHash(/* private fields */);

Hasher which computes the lowest 6 bits of a 32-bit FNV-1 variant.

This variant of FNV-1 hash has the regular prime constant of 0x01000193 but has a different initial state: 0x28021967 (in contrast to regular FNV-1-32’s 0x811c9dc5).

Since ssdeep only uses the lowest 6 bits of the hash value, it ignores any higher bits, enabling updating the state table-based (instead of multiply and xor).

Implementations

impl PartialFNVHash

pub fn new() -> Self

Creates a new PartialFNVHash with the initial value.

pub fn update_by_byte(&mut self, ch: u8) -> &mut Self

Updates the hash value by processing a byte.

pub fn update_by_iter(&mut self, iter: impl Iterator<Item = u8>) -> &mut Self

Updates the hash value by processing an iterator of u8.

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

Updates the hash value by processing a slice of u8.

pub fn value(&self) -> u8

Returns the current hash value.

Note that there’s no “finalization” on the FNV hash. You can even continue updating after reading the hash value.

Trait Implementations

impl AddAssign<&[u8]> for PartialFNVHash

fn add_assign(&mut self, buffer: &[u8])

Updates the hash value by processing a slice of u8.

impl<const N: usize> AddAssign<&[u8; N]> for PartialFNVHash

fn add_assign(&mut self, buffer: &[u8; N])

Updates the hash value by processing an array of u8.

impl AddAssign<u8> for PartialFNVHash

fn add_assign(&mut self, byte: u8)

Updates the hash value by processing a byte.

impl Clone for PartialFNVHash

fn clone(&self) -> PartialFNVHash

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PartialFNVHash

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

Formats the value using the given formatter.

impl Default for PartialFNVHash

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for PartialFNVHash

fn eq(&self, other: &PartialFNVHash) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PartialFNVHash

impl Eq for PartialFNVHash

impl StructuralPartialEq for PartialFNVHash