Struct FastCdc 

pub struct FastCdc { /* private fields */ }

FastCDC chunker parameters. Construct with FastCdc::v1 for the frozen v1 constants; other constructors exist mainly for tests that exercise the algorithm at smaller sizes.

Implementations

impl FastCdc

pub const fn v1() -> Self

Construct the v1 chunker (16 KiB / 64 KiB / 256 KiB, strict/loose 0x0001_FFFF / 0x0000_7FFF).

pub fn custom(min: usize, avg: usize, max: usize) -> Self

Construct a chunker with custom parameters. avg_size MUST be a power of two; the strict/loose masks are derived as mask = (1 << log2(avg)) - 1; mask_s = mask | (mask << 1); mask_l = mask >> 1. Returns MkitError::InvalidIdentity re-purposed as a generic “bad parameter” error if the constraints are violated — but in practice this constructor is only used by tests, where the inputs are constants, so we panic instead for a clearer failure mode.

Panics

Panics if min < avg < max is not strictly satisfied or avg is not a power of two.

pub const fn min_size(&self) -> usize

pub const fn avg_size(&self) -> usize

pub const fn max_size(&self) -> usize

pub fn cut(&self, data: &[u8]) -> usize

Find the cut point in data. Returns the length of the first chunk. Semantics:

• data.len() <= min_size → returns data.len() (no early cut).
• min_size < i <= avg_size → strict mask, fewer boundaries.
• avg_size < i <= max_size → loose mask, more boundaries.
• Otherwise → forced cut at min(max_size, data.len()).

Trait Implementations

impl Clone for FastCdc

fn clone(&self) -> FastCdc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FastCdc

impl Debug for FastCdc

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

Formats the value using the given formatter.