Enum HashAlgo 

pub enum HashAlgo {
    Sha1,
    Sha256,
}

A Git hash algorithm.

Git supports two object-id hash functions: the historical SHA-1 (20-byte digests, 40 hex chars) and the newer SHA-256 (32-byte digests, 64 hex chars). A repository’s algorithm is recorded in extensions.objectformat.

Variants

Sha1

SHA-1 — 20-byte digests.

Sha256

SHA-256 — 32-byte digests.

Implementations

impl HashAlgo

pub fn checksum_hasher(self) -> ChecksumHasher

Return a fresh incremental checksum hasher for this algorithm.

pub fn checksum_digest(self, data: &[u8]) -> Vec<u8>

Hash a byte slice with no Git object header and return a file checksum.

pub fn hasher(self) -> ObjectHasher

Return a fresh incremental hasher for this algorithm.

pub fn digest(self, data: &[u8]) -> Result<ObjectId>

Hash a byte slice with no Git object header.

Errors

Returns Error::HashCollision when sha1dc detects a chosen-prefix collision.

pub fn hash_object(self, kind: ObjectKind, data: &[u8]) -> Result<ObjectId>

Hash canonical Git store bytes for kind and data.

Errors

Returns Error::HashCollision when sha1dc detects a chosen-prefix collision.

impl HashAlgo

pub const fn len(self) -> usize

The raw digest length in bytes (20 for SHA-1, 32 for SHA-256).

pub const fn is_empty(self) -> bool

Always false — every hash algorithm has a non-zero digest length.

pub const fn hex_len(self) -> usize

The hex-encoded digest length (40 for SHA-1, 64 for SHA-256).

pub const fn name(self) -> &'static str

The lowercase name as written in extensions.objectformat.

pub const fn oid_version(self) -> u8

The oid_version byte used in .idx/multi-pack-index headers (SHA-1 → 1, SHA-256 → 2).

pub fn from_name(name: &str) -> Option<Self>

Parse from the name used in extensions.objectformat config.

pub const fn from_len(len: usize) -> Option<Self>

The algorithm implied by a raw digest length, if recognised.

Trait Implementations

impl Clone for HashAlgo

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for HashAlgo

impl Debug for HashAlgo

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

Formats the value using the given formatter.

impl Default for HashAlgo

fn default() -> Self

Returns the “default value” for a type.

impl Eq for HashAlgo

impl From<HashAlgo> for u8

fn from(algo: HashAlgo) -> Self

Converts to this type from the input type.

impl Hash for HashAlgo

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for HashAlgo

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for HashAlgo

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for HashAlgo

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for HashAlgo

impl TryFrom<u8> for HashAlgo

type Error = HashVersionError

The type returned in the event of a conversion error.

fn try_from(version: u8) -> Result<Self, Self::Error>

Performs the conversion.