xwde: 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.

Note : The library contains unsafe code. See implementation of Async* traits for more details.

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:

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

fn main() { 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().reader_bytes());

} ```

• std::io::Write:

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

fn main() { 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().writer_bytes());

} ```