restd 0.3.0

A re-implementation of various std features
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

use crate::io::{Read, ReadResult, Write};

pub mod buffer;
pub mod counter;
pub mod cursor;
pub mod io_fmt;

/// Copy bytes from `reader` to `writer` until `reader` is exhausted (returns
/// `None`).
pub fn copy<R, W>(reader: &mut R, writer: &mut W) -> ReadResult
where
    R: Read + ?Sized,
    W: Write + ?Sized,
{
    let mut any = false;
    let mut total = 0;
    let mut buf = [0; 128];
    while let Some(read) = reader.read(&mut buf)? {
        writer.write_all(&buf)?;
        total += read;
        any = true;
    }

    if any {
        Ok(Some(total))
    } else {
        Ok(None)
    }
}