Struct Signature 

pub struct Signature {
    pub block_size: u32,
    pub blocks: Vec<BlockSig>,
}

A compact fingerprint of an old buffer: everything the delta encoder needs to find reusable blocks, and nothing else.

This is the wire-friendly half of the rsync split. The machine that holds the old file (“receiver”) computes a Signature with Signature::compute and sends it across; the machine that holds the new file (“sender”) feeds it to encode_with_signature to produce a Delta — without ever shipping the old bytes.

Fields

block_size: u32

Block size the blocks were cut at.

blocks: Vec<BlockSig>

Per-block fingerprints, in old order.

Implementations

impl Signature

pub fn compute(old: &[u8], block_override: Option<usize>) -> Self

Compute the signature of old.

block_override forces a block size (must be ≥ 1); otherwise block_size_for picks one from old.len().

pub fn len(&self) -> usize

Number of blocks in the signature.

pub fn is_empty(&self) -> bool

Whether the signature is empty (the old buffer had no bytes).

Trait Implementations

impl Clone for Signature

fn clone(&self) -> Signature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Signature

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Signature

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Signature

impl PartialEq for Signature

fn eq(&self, other: &Signature) -> 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 Serialize for Signature

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Signature