Struct bczhc_lib::io::duplicator::DuplicationReader

pub struct DuplicationReader<R, DW>where
    R: Read,
    DW: Write,{ /* private fields */ }

A wrapper reader. When read, also write the data to a third writer.

Examples

use std::io::{Cursor, Read};
use bczhc_lib::io::duplicator::DuplicationReader;
let mut dupe_writer = Cursor::new(Vec::new());
let mut data = Cursor::new(*b"hello");
let mut reader = DuplicationReader::new(&mut data, &mut dupe_writer);

let mut content = String::new();
reader.read_to_string(&mut content).unwrap();

assert_eq!(&dupe_writer.into_inner(), b"hello");
assert_eq!(content, "hello");

Implementations

impl<R, DW> DuplicationReader<R, DW>where R: Read, DW: Write,

pub fn new(reader: R, duplication_writer: DW) -> Self

Trait Implementations

impl<R, DW> Read for DuplicationReader<R, DW>where R: Read, DW: Write,

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

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

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

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

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.

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.

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

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

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

Read the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

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

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

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

Read the exact number of bytes required to fill cursor.

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

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

fn bytes(self) -> Bytes<Self>where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

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

Creates an adapter which will chain this stream with another.

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

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