Struct SeekDirectory 

pub struct SeekDirectory {
    pub section_flags: u8,
    pub entries: Vec<DirectoryEntry>,
    pub classes: Vec<ClassEntry>,
    pub channel_lengths: Vec<u64>,
}

A decoded DIRECTORY record payload.

Field vectors correspond to the sections named by section_flags; vectors for absent sections are empty.

Fields

section_flags: u8

Section flags present in the encoded record.

entries: Vec<DirectoryEntry>

Record locators in file order, when SECTION_LOCATORS is set.

classes: Vec<ClassEntry>

Per-class index, when SECTION_CLASS_INDEX is set.

channel_lengths: Vec<u64>

Per-ENTROPY_CHANNEL decoded length in table order, when SECTION_CHANNEL_LENGTHS is set.

Implementations

impl SeekDirectory

pub fn encode(&self) -> Result<Vec<u8>>

Encode the payload to canonical bytes.

A section’s flag and its vector must agree: a set flag with an empty vector is encoded as a count of zero (valid), but a clear flag with a non-empty vector is an error rather than a silently dropped section.

pub fn decode(bytes: &[u8], limits: Limits) -> Result<SeekDirectory>

Decode and structurally bound a payload.

This checks the size bound, the version, the section flags, and that every section fits its declared count. It does not check agreement with the actual record framing; call SeekDirectory::validate for that.

pub fn validate( &self, records: &[RecordSite], file_len: u64, limits: Limits, ) -> Result<()>

Validate the directory against the actual record framing.

Runs the internal structural checks and then requires that Self::entries agrees byte-for-byte with records (tag, offset, payload length). This is the advisory cross-check: the directory is a claim, and the framing is the authority.

pub fn validate_structural(&self, file_len: u64, limits: Limits) -> Result<()>

Validate the directory’s internal consistency and its coverage of the file.

This needs only the directory and the file length, so a seek reader can run it without reading the whole record set.

Trait Implementations

impl Clone for SeekDirectory

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 SeekDirectory

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

Formats the value using the given formatter.

impl Default for SeekDirectory

fn default() -> Self

Returns the “default value” for a type.

impl Eq for SeekDirectory

impl PartialEq for SeekDirectory

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SeekDirectory