Enum ChecksumHasher 

pub enum ChecksumHasher {
    Sha1(Sha1),
    Sha256(Sha256),
}

Incremental hasher for Git file checksums (pack/index/MIDX/commit-graph trailers).

Checksums use the same SHA-1 or SHA-256 digests as object ids but name file integrity, not ObjectId values. Prefer this type anywhere a trailer or non-object content hash is computed or verified.

Variants

Sha1(Sha1)

SHA-1 (20-byte digests).

Sha256(Sha256)

SHA-256 (32-byte digests).

Implementations

impl ChecksumHasher

pub fn new(algo: HashAlgo) -> Self

Create a fresh checksum hasher for algo.

pub fn algo(self: &ChecksumHasher) -> HashAlgo

The hash algorithm this hasher produces.

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

Feed more bytes into the digest.

pub fn finalize(self) -> Vec<u8>

Finish hashing and return the raw digest bytes.

pub fn finalize_into(self, out: &mut [u8]) -> usize

Write the raw digest into out and return the number of bytes written.

Panics

Panics when out is shorter than the digest length for this algorithm.

Trait Implementations

impl Clone for ChecksumHasher

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChecksumHasher

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

Formats the value using the given formatter.

impl Write for ChecksumHasher

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

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

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

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

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.