Struct WalHeader 

#[repr(C)]
pub struct WalHeader {
    pub magic: u32,
    pub file_format: u32,
    pub page_size: u32,
    pub checkpoint_seq: u32,
    pub salt_1: u32,
    pub salt_2: u32,
    pub checksum_1: u32,
    pub checksum_2: u32,
}

The Write-Ahead Log (WAL) header. The first 32 bytes of a WAL file comprise the WAL header. The WAL header is divided into the following fields stored in big-endian order.

Fields

magic: u32

Magic number. 0x377f0682 or 0x377f0683 If the LSB is 0, checksums are native byte order, else checksums are serialized

file_format: u32

WAL format version. Currently 3007000

page_size: u32

Database page size in bytes. Power of two between 512 and 65536 inclusive

checkpoint_seq: u32

Checkpoint sequence number. Increases with each checkpoint

salt_1: u32

Random value used for the first salt in checksum calculations TODO: Incremented with each checkpoint

salt_2: u32

Random value used for the second salt in checksum calculations. TODO: A different random value for each checkpoint

checksum_1: u32

First checksum value in the wal-header

checksum_2: u32

Second checksum value in the wal-header

Implementations

impl WalHeader

pub const fn new() -> Self

impl WalHeader

pub fn as_bytes(&self) -> &[u8]

Trait Implementations

impl Clone for WalHeader

fn clone(&self) -> WalHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WalHeader

impl Debug for WalHeader

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

Formats the value using the given formatter.

impl Default for WalHeader

fn default() -> Self

Returns the “default value” for a type.