Struct JournalHeader 

pub struct JournalHeader {
    pub flags: u8,
    pub compression: u8,
    pub first_seq: u64,
    pub last_seq: u64,
    pub entry_count: u64,
    pub body_len: u64,
    pub body_checksum: [u8; 32],
    pub prev_segment_checksum: u64,
    pub created_ms: i64,
}

Header for a journal segment.

Fields

flags: u8

compression: u8

first_seq: u64

Sequence number of the first entry in this segment.

last_seq: u64

Sequence number of the last entry (0 if unsealed).

entry_count: u64

Number of entries (0 if unsealed).

body_len: u64

Length of the body in bytes (0 if unsealed).

body_checksum: [u8; 32]

SHA-256 of the body bytes (zeros if unsealed).

prev_segment_checksum: u64

Checksum from the previous segment (for cross-segment chain verification).

created_ms: i64

Milliseconds since Unix epoch.

Implementations

impl JournalHeader

pub fn is_sealed(&self) -> bool

Returns true if this segment is sealed (finalized).

pub fn is_compressed(&self) -> bool

Returns true if the body is compressed.

pub fn has_chain_hash(&self) -> bool

Returns true if a chain hash trailer is present.

Trait Implementations

impl Clone for JournalHeader

fn clone(&self) -> JournalHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JournalHeader

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

Formats the value using the given formatter.

impl PartialEq for JournalHeader

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for JournalHeader

impl StructuralPartialEq for JournalHeader