Crate countio

The wrapper struct to enable byte counting for std::io::Read and std::io::Write and its asynchronous variants from futures and tokio crates.

Features

• std to enable std::io::Read and std::io::Write. Enabled by default.
• futures to enable futures_io::AsyncRead and futures_io::AsyncWrite.
• tokio to enable tokio::io::AsyncRead and tokio::io::AsyncWrite.

Examples

• std::io::Read:

use std::io::prelude::*;
use std::io::BufReader;
use countio::Counter;

let mut reader = "Hello World!".as_bytes();
let mut reader = Counter::new(&mut reader);
let mut reader = BufReader::new(&mut reader);

let mut buf = String::new();
let len = reader.read_line(&mut buf).unwrap();

assert_eq!(len, reader.get_ref().read_bytes());

• std::io::Write:

use std::io::prelude::*;
use std::io::BufWriter;
use countio::Counter;

let mut writer = Vec::new();
let mut writer = Counter::new(&mut writer);
let mut writer = BufWriter::new(&mut writer);

let buf = "Hello World!".as_bytes();
let len = writer.write(buf).unwrap();
writer.flush().unwrap();

assert_eq!(len, writer.get_ref().written_bytes());

Structs

• Counter
  Generic reader & writer wrapper with byte counting capability.