Enum DataSource

pub enum DataSource<'a> {
    Owned(Vec<u8>),
    Ref(&'a [u8]),
    File(File, u64),
}

The source of data for given metadata or chunk.

Variants

Owned(Vec<u8>)

Data owned in the data source.

Ref(&'a [u8])

Data referred to by the data source.

File(File, u64)

An open file and the length of the data contained within it.

Implementations

impl<'a> DataSource<'a>

pub fn owned(data: impl Into<Vec<u8>>) -> DataSource<'a>

Create a new owned data source.

pub fn reference(data: &'a [u8]) -> DataSource<'a>

Create a data source referencing a u8 array.

pub fn file(source: File, len: u64) -> DataSource<'a>

Create a new file data source.

pub fn len(&self) -> Option<usize>

Get the length of the content if known at this time.

pub fn prepare(&mut self) -> Result<u64, Error>

Prepare the content of the data. For compressed content this runs the default compression and turns this into an Owned variant.

Trait Implementations

impl<'a> Debug for DataSource<'a>

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

Formats the value using the given formatter.

impl<'a> TryInto<DataSource<'a>> for &[u8]

type Error = Error

The type returned in the event of a conversion error.

fn try_into( self, ) -> Result<DataSource<'a>, <&[u8] as TryInto<DataSource<'a>>>::Error>

Performs the conversion.

impl<'a> TryInto<DataSource<'a>> for &Path

type Error = Error

The type returned in the event of a conversion error.

fn try_into( self, ) -> Result<DataSource<'a>, <&Path as TryInto<DataSource<'a>>>::Error>

Performs the conversion.

impl<'a> TryInto<DataSource<'a>> for &str

type Error = Error

The type returned in the event of a conversion error.

fn try_into( self, ) -> Result<DataSource<'a>, <&str as TryInto<DataSource<'a>>>::Error>

Performs the conversion.

impl<'a> TryInto<DataSource<'a>> for Vec<u8>

type Error = Error

The type returned in the event of a conversion error.

fn try_into( self, ) -> Result<DataSource<'a>, <Vec<u8> as TryInto<DataSource<'a>>>::Error>

Performs the conversion.