Struct FileHasher

pub struct FileHasher { /* private fields */ }

• File hasher to calculate the hash for a section of a file, the hash is u64 size. The Write trait was implemented for it.

Implementations

impl FileHasher

pub fn new() -> Self

pub fn hash<R>(self, reader: &mut R, from_byte: u64, length: u64) -> Result<u64>

where R: Read + Seek,

• Calculate the hash of the data from the reader with offset from_byte and length length, consumes it self

pub fn finish(self) -> u64

• If you are using its Write trait, call this function to get the hash.

Trait Implementations

impl Clone for FileHasher

fn clone(&self) -> FileHasher

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FileHasher

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

Formats the value using the given formatter.

impl Default for FileHasher

fn default() -> FileHasher

Returns the “default value” for a type.

impl Write for FileHasher

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.