tar 0.4.5

A Rust implementation of a TAR file reader and writer. This library does not currently handle compression, but it is abstract over all I/O readers and writers. Additionally, great lengths are taken to ensure that the entire contents are never required to be entirely resident in memory all at once.

use std::error;
use std::fmt;
use std::io::{self, Error};

#[derive(Debug)]
pub struct TarError {
    desc: String,
    io: io::Error,
}

impl TarError {
    pub fn new(desc: &str, err: Error) -> TarError {
        TarError {
            desc: desc.to_string(),
            io: err,
        }
    }
}

impl error::Error for TarError {
    fn description(&self) -> &str {
        &self.desc
    }

    fn cause(&self) -> Option<&error::Error> {
        Some(&self.io)
    }
}

impl fmt::Display for TarError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        self.desc.fmt(f)
    }
}

impl From<TarError> for Error {
    fn from(t: TarError) -> Error {
        Error::new(t.io.kind(), t)
    }
}