Struct RollbackJournal 

pub struct RollbackJournal { /* private fields */ }

A parsed rollback journal: its header tier plus the ordered, first-wins page images (design §3/§5). The temporal inverse of the WAL overlay — these images are the database as it was BEFORE the last transaction.

Implementations

impl RollbackJournal

pub fn parse(bytes: &[u8], page_size: u32) -> Result<Self, Error>

LOWER-LEVEL, UNAUTHENTICATED parse (design §5): interpret bytes as a rollback journal given an externally-supplied page_size. Does NOT bind the journal to a particular database — prefer Database::rollback_prior, which supplies the authoritative page size from the main db.

Tier A (magic present) trusts the header and verifies each checksum. Tier B (magic absent — PERSIST post-commit) reconstructs the sector size by candidate scoring and walks records (checksums unverifiable). Robust: a malformed/truncated journal yields fewer images, never a panic; a page size that is not a power of two in [512, 65536] is a typed Error::BadJournalPageSize carrying the offending value.

pub fn header(&self) -> &JournalHeader

The parsed (or reconstructed) header.

pub fn page_images(&self) -> &[JournalPageImage]

The ordered, first-wins pre-transaction page images.

pub fn has_duplicate_pgno(&self) -> bool

Whether a pgno appeared more than once across the parsed segments — the spec says a page is journaled at most once, so a repeat is consistent with corruption, a savepoint/super-journal artifact, or tampering (design §3).

pub fn duplicate_pgnos(&self) -> &[u32]

The page numbers that appeared more than once (first occurrence kept), each listed once in first-seen order — the offending values behind Self::has_duplicate_pgno. Empty for a well-formed journal.

Trait Implementations

impl Clone for RollbackJournal

fn clone(&self) -> RollbackJournal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RollbackJournal

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

Formats the value using the given formatter.

impl Eq for RollbackJournal

impl PartialEq for RollbackJournal

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RollbackJournal