Struct Page

pub struct Page { /* private fields */ }

Page is a wrapper for a single page of memory providing some helpful helpers for quick access.

Implementations

impl Page

pub fn new(data: [u8; 4096]) -> Page

pub fn write_value_at_offset( &mut self, offset: usize, value: usize, ) -> Result<(), Error>

write_value_at_offset writes a given value (as BigEndian) at a certain offset overriding values at that offset.

pub fn get_value_from_offset(&self, offset: usize) -> Result<usize, Error>

get_value_from_offset Fetches a value calculated as BigEndian, sized to usize. This function may error as the value might not fit into a usize.

pub fn insert_bytes_at_offset( &mut self, bytes: &[u8], offset: usize, end_offset: usize, size: usize, ) -> Result<(), Error>

insert_bytes_at_offset pushes #size bytes from offset to end_offset inserts #size bytes from given slice.

pub fn write_bytes_at_offset( &mut self, bytes: &[u8], offset: usize, size: usize, ) -> Result<(), Error>

write_bytes_at_offset write bytes at a certain offset overriding previous values.

pub fn get_ptr_from_offset(&self, offset: usize, size: usize) -> &[u8]

get_ptr_from_offset Fetches a slice of bytes from certain offset and of certain size.

pub fn get_data(&self) -> [u8; 4096]

get_data returns the underlying array.

Trait Implementations

impl TryFrom<&Node> for Page

Implement TryFrom<Box> for Page allowing for easier serialization of data from a Node to an on-disk formatted page.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(node: &Node) -> Result<Page, Error>

Performs the conversion.

impl TryFrom<Page> for Node

Implement TryFrom for Node allowing for easier deserialization of data from a Page.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(page: Page) -> Result<Node, Error>

Performs the conversion.