Struct Extent 

pub struct Extent {
    pub offset: u64,
    pub length: u32,
    pub hash: u64,
    pub first: u64,
}

Where one extent of a section’s payload lives.

Each carries its own checksum, which is the second of section 3.2’s three rules: an extent is independently readable, so a reduction that only needs the third extent of a forward link reads and verifies one extent rather than two gigabytes.

Fields

offset: u64

Where the extent’s bytes start.

length: u32

How many bytes it holds, at most MAX_EXTENT.

hash: u64

Checksum over those bytes.

first: u64

How many logical elements precede this extent, so that a random access can find the extent holding an element without reading any of them.

Trait Implementations

impl Clone for Extent

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 Extent

impl Debug for Extent

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

Formats the value using the given formatter.

impl Eq for Extent

impl PartialEq for Extent

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Extent