Struct zeros::HashReader

pub struct HashReader<R> where
    R: Read,  { /* fields omitted */ }

👎 Deprecated:

Beta

Hash Reader

Notes

• You can make this struct via Hash.

• For each call to read():

  • The inner reader will be called first. If an error occurs, it will be returned. The hasher will not be updated.
  • Then the hasher will be updated.

Examples

use {
    std::io::Read,
    zeros::Hash,
};

const DATA: &[u8] = b"test";
const HASH: Hash = Hash::Sha3_256;

let mut buf = Vec::new();
let mut reader = HASH.new_reader(DATA);
reader.read_to_end(&mut buf)?;

let (hash, _) = reader.finish();
assert_eq!(hash, HASH.hash(DATA));
assert_eq!(buf, DATA);

Implementations

impl<R> HashReader<R> where
    R: Read, 

pub fn finish(self) -> (Vec<u8>, R)

👎 Deprecated:

Beta

Finishes and returns hash and the inner reader

pub fn finish_as_hex(self) -> (String, R)

👎 Deprecated:

Beta

Finishes and returns hash as a hexadecimal string, in lower-case, and the inner reader

Trait Implementations

impl<R: Debug> Debug for HashReader<R> where
    R: Read, 

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

Formats the value using the given formatter.

impl<R> Read for HashReader<R> where
    R: Read, 

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

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

pub fn read_vectored(
    &mut self,
    bufs: &mut [IoSliceMut<'_>]
) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

pub fn is_read_vectored(&self) -> bool

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

Determines if this Reader has an efficient read_vectored implementation.

pub unsafe fn initializer(&self) -> Initializer

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

Determines if this Reader can work with buffers of uninitialized memory.

pub fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

pub fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

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

Read the exact number of bytes required to fill buf.

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

Creates a “by reference” adaptor for this instance of Read.

pub fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes.

pub fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

pub fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.