Enum Algorithm 

pub enum Algorithm {
    Sha1,
    Sha256,
    Sha512,
    Blake3,
    Md5,
    XxHash64,
    FastCdc,
    Perceptual,
    Unknown,
}

The hash functions this workspace can produce, so an index record can say what it was computed with.

The as_str / from_str pair is the stable wire form: these strings appear in on-disk records and must not change without a format version bump.

Variants

Sha1

SHA-1. 20-byte digests.

Sha256

SHA-2 with a 256-bit state. 32-byte digests.

Sha512

SHA-2 with a 512-bit state. 64-byte digests.

Blake3

BLAKE3 with the default 32-byte output.

Md5

MD5. 16-byte digests.

XxHash64

xxHash64. 8-byte digests.

FastCdc

FastCDC content-defined chunking. 4-byte digests: the 32-bit Gear fingerprint at the cut point, the width the FastCDC reference implementation produces.

Perceptual

A perceptual hash. The width is a property of the modality (image, audio, video, text), so output_len is None.

Unknown

A name written by a future version of this kit. A record carrying it can still be read; it just cannot be recomputed here.

Implementations

impl Algorithm

pub fn as_str(&self) -> &'static str

The stable wire form, e.g. "sha256".

pub fn from_str(s: &str) -> Self

Parses the wire form. An unrecognised string yields Algorithm::Unknown, never an error, so records written by a future version stay readable. Matching is exact and case-sensitive: "SHA256" is Unknown.

pub fn output_len(&self) -> Option<usize>

Digest width in bytes for the fixed-width members; None for Perceptual, whose width is a property of the modality, and for Unknown.

Trait Implementations

impl Clone for Algorithm

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 Algorithm

impl Debug for Algorithm

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

Formats the value using the given formatter.

impl Display for Algorithm

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

Formats the value using the given formatter.

impl Eq for Algorithm

impl PartialEq for Algorithm

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Algorithm