Struct git_repository::oid

#[repr(transparent)]
pub struct oid { /* fields omitted */ }

A borrowed reference to a hash identifying objects.

Future Proofing

In case we wish to support multiple hashes with the same length we cannot discriminate using the slice length anymore. To make that work, we will use the high bits of the internal bytes slice length (a fat pointer, pointing to data and its length in bytes) to encode additinoal information. Before accessing or returning the bytes, a new adjusted slice will be constructed, while the high bits will be used to help resolving the hash [kind()][oid::kind()]. We expect to have quite a few bits available for such ‘conflict resolution’ as most hashes aren’t longer than 64 bytes.

Implementations

impl oid

Conversion

pub fn try_from(digest: &[u8]) -> Result<&oid, Error>

Try to create a shared object id from a slice of bytes representing a hash digest

impl oid

Access

pub fn kind(&self) -> Kind

The kind of hash used for this Digest

pub fn first_byte(&self) -> u8

The first byte of the hash, commonly used to partition a set of Ids

pub fn as_bytes(&self) -> &[u8]

Interpret this object id as raw byte slice.

pub fn to_hex(&self, len: usize) -> HexDisplay<'_>

Return a type which can display itself in hexadecimal form with the len amount of characters.

impl oid

Sha1 specific methods

pub fn to_sha1_hex(&self) -> [u8; 40]

Returns an array with a hexadecimal encoded version of the Sha1 hash this Id represents.

Panics if this is not a Sha1 hash, as identifiable by ObjectId::kind().

pub fn sha1(&self) -> &[u8; 20]

Returns the bytes making up the Sha1.

Panics if this is not a Sha1 hash, as identifiable by ObjectId::kind().

pub fn null_sha1() -> &'static oid

Returns a Sha1 digest with all bytes being initialized to zero.

Trait Implementations

impl<'_> AsRef<oid> for &'_ oid

pub fn as_ref(&self) -> &oid

Performs the conversion.

impl AsRef<oid> for ObjectId

pub fn as_ref(&self) -> &oid

Performs the conversion.

impl<'repo, A> AsRef<oid> for Oid<'repo, A>

fn as_ref(&self) -> &oid

Performs the conversion.

impl Borrow<oid> for ObjectId

pub fn borrow(&self) -> &oid

Immutably borrows from an owned value.

impl Debug for oid

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

Formats the value using the given formatter.

impl<'_> Display for &'_ oid

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

Formats the value using the given formatter.

impl<'_> From<&'_ oid> for ObjectId

pub fn from(v: &oid) -> ObjectId

Performs the conversion.

impl<'a> From<&'a [u8; 20]> for &'a oid

pub fn from(v: &'a [u8; 20]) -> &'a oid

Performs the conversion.

impl Hash for oid

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl Ord for oid

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl<'_> PartialEq<&'_ oid> for ObjectId

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<'_> PartialEq<ObjectId> for &'_ oid

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialEq<oid> for oid

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<'repo, A> PartialEq<oid> for Oid<'repo, A>

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<oid> for oid

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl ToOwned for oid

type Owned = ObjectId

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> <oid as ToOwned>::Owned

Creates owned data from borrowed data, usually by cloning.

fn clone_into(&self, target: &mut Self::Owned)

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

Uses borrowed data to replace owned data, usually by cloning.

impl Eq for oid

impl StructuralEq for oid

impl StructuralPartialEq for oid