Struct uucore::sum::DigestWriter

pub struct DigestWriter<'a> { /* private fields */ }

A struct that writes to a digest.

This struct wraps a Digest and provides a Write implementation that passes input bytes directly to the Digest::hash_update.

On Windows, if binary is false, then the write implementation replaces instances of “\r\n” with “\n” before passing the input bytes to the [digest].

Implementations

impl<'a> DigestWriter<'a>

pub fn new(digest: &'a mut Box<dyn Digest>, binary: bool) -> DigestWriter<'_>

pub fn finalize(&mut self) -> bool

Trait Implementations

impl<'a> Write for DigestWriter<'a>

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

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

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

Flush 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, fmt: Arguments<'_>) -> Result<(), Error>

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

fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

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