Struct SegmentScanner 

pub struct SegmentScanner { /* private fields */ }

Scans a segment from a growing prefix of its bytes, so recovery reads only the valid records plus the first zero block after them instead of the whole preallocated file. Fed the complete image, it returns exactly what scan_segment returns.

Implementations

impl SegmentScanner

pub fn start(bytes: &[u8], complete: bool) -> Result<Option<Self>, ScanError>

Reads the header. Ok(None) for a never-activated segment. A prefix shorter than the whole file must hold at least the header block.

pub fn header(&self) -> &SegmentHeader

pub fn advance( &mut self, bytes: &[u8], complete: bool, visit: &mut dyn FnMut(Lsn, RecordBuf), ) -> Progress

Continues the scan over bytes, the segment’s first bytes.len() bytes (each call passes a longer prefix of the same file). complete says bytes is the whole file. Records already visited are not visited again.