Struct Wal 

pub struct Wal<S: Source> { /* private fields */ }

A -wal file, read up to its last commit.

Implementations

impl<S: Source> Wal<S>

pub fn open(source: S) -> Result<Wal<S>>

Read and validate a -wal file.

An empty file is not an error: sqlite leaves a zero length -wal behind after a checkpoint, and so does a database that has been in wal mode but never written to.

pub fn is_empty(&self) -> bool

Whether the log contributes anything at all.

pub fn page_size(&self) -> u32

Page size the log was written with. Zero for an empty log.

pub fn page_count(&self) -> u32

Database size in pages as of the last commit, zero for an empty log.

pub fn frame_counts(&self) -> (u32, u32)

Frames the log holds, and how many of them survived validation and ended at a commit.

pub fn read_page_part( &self, number: u32, offset: u32, buf: &mut [u8], ) -> Result<bool>

Read buf.len() bytes of page number starting offset bytes into it, if the log holds a committed version of that page.