Struct random_access_disk::RandomAccessDisk

pub struct RandomAccessDisk { /* private fields */ }

Main constructor.

Implementations

impl RandomAccessDisk

pub fn open(filename: PathBuf) -> Result<RandomAccessDisk, Error>

Create a new instance.

Trait Implementations

impl Debug for RandomAccessDisk

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

Formats the value using the given formatter.

impl Drop for RandomAccessDisk

fn drop(&mut self)

Executes the destructor for this type.

impl RandomAccess for RandomAccessDisk

type Error = Error

An error.

fn write(&mut self, offset: usize, data: &[u8]) -> Result<(), Self::Error>

Write bytes at an offset to the backend.

fn read(&mut self, offset: usize, length: usize) -> Result<Vec<u8>, Self::Error>

Read a sequence of bytes at an offset from the backend.

fn read_to_writer(
    &mut self,
    _offset: usize,
    _length: usize,
    _buf: &mut impl Write
) -> Result<(), Self::Error>

Read a sequence of bytes at an offset from the backend.

fn del(&mut self, _offset: usize, _length: usize) -> Result<(), Self::Error>

Delete a sequence of bytes at an offset from the backend.

fn truncate(&mut self, length: usize) -> Result<(), Self::Error>

Resize the sequence of bytes, possibly discarding or zero-padding bytes from the end.

fn len(&mut self) -> Result<usize, Self::Error>

Get the size of the storage in bytes.

fn is_empty(&mut self) -> Result<bool, Self::Error>

Whether the storage is empty. For some storage backends it may be cheaper to calculate whether the storage is empty than to calculate the length.