Struct DatabaseHeader 

pub struct DatabaseHeader {
    pub magic: [u8; 4],
    pub version: u32,
    pub schema_root_page: u32,
    pub next_table_id: u32,
    pub checksum: u32,
}

Database header structure stored on page 0.

Fields

magic: [u8; 4]

Magic bytes to identify Hematite database files

version: u32

Database format version

schema_root_page: u32

Root page of the schema B-tree

next_table_id: u32

Next available table ID

checksum: u32

Header checksum for integrity verification

Implementations

impl DatabaseHeader

pub const MAGIC: [u8; 4]

Magic bytes for Hematite database files

pub const CURRENT_VERSION: u32 = 2

Current database format version.

Version 2 is the first version after the M0 storage reset that intentionally breaks compatibility with previous files.

pub const HEADER_PAGE_ID: u32 = 0

Fixed page ID for database header (consistent with existing implementation)

pub fn new(schema_root_page: u32) -> Self

Create a new database header with default values

pub fn calculate_checksum(&self) -> u32

Calculate checksum for header integrity

pub fn verify_checksum(&self) -> bool

Verify header integrity

pub fn serialize(&self, bytes: &mut [u8]) -> Result<()>

Serialize header to page data

pub fn deserialize(bytes: &[u8]) -> Result<Self>

Deserialize header from page data

pub fn increment_table_id(&mut self) -> TableId

Update next table ID and recalculate checksum

Trait Implementations

impl Clone for DatabaseHeader

fn clone(&self) -> DatabaseHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DatabaseHeader

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

Formats the value using the given formatter.