Struct vapor_archive::write::hash_writer::HashWriter

pub struct HashWriter<'w, W: Write + Seek + 'w> { /* fields omitted */ }

HashWriter struct

Wraps another writer and recors the written bytes to a BLAKE2S hasher, whose hash you can retrieve later

Implementations

impl<'w, W: Write + Seek + 'w> HashWriter<'w, W>

pub fn new(writer: &'w mut W) -> Self

Creates a new instance, wrapping the given writer

pub fn get_hash(&mut self) -> [u8; 32]

Retrieves the BLAKE2S hash as a 32B array, resetting the hasher

Trait Implementations

impl<'w, W: Write + Seek + 'w> Seek for HashWriter<'w, W>

fn seek(&mut self, pos: SeekFrom) -> IoResult<u64>

Seek to an offset, in bytes, in a stream.

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

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

Returns the length of this stream (in bytes).

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

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

Returns the current seek position from the start of the stream.

impl<'w, W: Write + Seek + 'w> Write for HashWriter<'w, W>

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

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

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

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 Writeer 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 Self

Creates a "by reference" adaptor for this instance of Write.