Struct Cursor 

pub struct Cursor { /* private fields */ }

A cursor pointing to a specific position within an offset array chain

Implementations

impl Cursor

pub fn head(&self) -> Self

pub fn at_head(list: List) -> Self

Create a cursor at the head of the chain

pub fn at_tail<M: MemoryMap>( journal_file: &JournalFile<M>, list: List, ) -> Result<Self>

Create a cursor at the tail of the chain

pub fn at_position<M: MemoryMap>( journal_file: &JournalFile<M>, offset_array_list: List, array_offset: NonZeroU64, array_index: usize, remaining_items: NonZeroUsize, ) -> Result<Self>

Create a cursor at a specific position

pub fn node<M: MemoryMap>(&self, journal_file: &JournalFile<M>) -> Result<Node>

Get the current array this cursor points to

pub fn value<M: MemoryMap>( &self, journal_file: &JournalFile<M>, ) -> Result<Option<NonZeroU64>>

pub fn next<M: MemoryMap>( &self, journal_file: &JournalFile<M>, ) -> Result<Option<Self>>

Move to the next position

pub fn previous<M: MemoryMap>( &self, journal_file: &JournalFile<M>, ) -> Result<Option<Self>>

Move to the previous position

pub fn collect_offsets<M: MemoryMap>( &self, journal_file: &JournalFile<M>, offsets: &mut Vec<NonZeroU64>, ) -> Result<()>

Trait Implementations

impl Clone for Cursor

fn clone(&self) -> Cursor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cursor

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

Formats the value using the given formatter.