Struct HashingWriter 

struct HashingWriter<'a, 'r> {
    hasher: Sha256,
    name: &'a str,
    hashed: u64,
    reported: u64,
    cancelled: bool,
    interval: u64,
    on_progress: &'a mut (dyn FnMut(Progress) -> ControlFlow<()> + 'r),
}

Feeds bytes into the digest and checkpoints cancellation every interval bytes, so a cancel during verification does not wait out the whole hash.

Fields

hasher: Sha256

name: &'a str

hashed: u64

reported: u64

cancelled: bool

interval: u64

on_progress: &'a mut (dyn FnMut(Progress) -> ControlFlow<()> + 'r)

Implementations

impl HashingWriter<'_, '_>

fn report(&mut self) -> ControlFlow<()>

Trait Implementations

impl Write for HashingWriter<'_, '_>

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.