Struct FileBackend

pub struct FileBackend(/* private fields */);

A backend using a file.

Implementations

impl FileBackend

pub fn from_file(file: File) -> Self

Use an already open File as the backend.

pub fn into_inner(self) -> File

Return the inner File.

impl FileBackend

pub fn from_path_or_fail<P: AsRef<Path>>(path: P) -> BackendResult<Self>

Opens a new FileBackend for a given path. Errors when the file doesn’t yet exist.

pub fn from_path_or_create<P: AsRef<Path>>( path: P, ) -> BackendResult<(Self, bool)>

Opens a new FileBackend for a given path. Creates a file if it doesn’t yet exist.

Returns the FileBackend and whether the file already existed.

pub fn from_path_or_create_and<P, C>(path: P, closure: C) -> BackendResult<Self>

where C: FnOnce(&mut File), P: AsRef<Path>,

Opens a new FileBackend for a given path. Creates a file if it doesn’t yet exist, and calls closure with it.

Trait Implementations

impl Backend for FileBackend

fn get_data(&mut self) -> BackendResult<Vec<u8>>

Read the all data from the backend.

fn put_data(&mut self, data: &[u8]) -> BackendResult<()>

Write the whole slice to the backend.

impl Debug for FileBackend

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

Formats the value using the given formatter.