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//! Rust Implementation of Erlang Distribution Protocol.
//!
//! Distribution protocol is used to communicate with distributed erlang nodes.
//!
//! Reference: [12 Distribution Protocol](http://erlang.org/doc/apps/erts/erl_dist_protocol.html)
//!
//! # Examples
//!
//! - Client Node Example: [send_msg.rs]
//!                        (https://github.com/sile/erl_dist/blob/master/examples/send_msg.rs)
//! - Server Node Example: [recv_msg.rs]
//!                        (https://github.com/sile/erl_dist/blob/master/examples/recv_msg.rs)
#![warn(missing_docs)]

extern crate eetf;
extern crate futures;
extern crate handy_async;
extern crate md5;
extern crate rand;
#[macro_use]
extern crate bitflags;

macro_rules! invalid_data {
    ($fmt:expr) => { invalid_data!($fmt,); };
    ($fmt:expr, $($arg:tt)*) => {
        ::std::io::Error::new(::std::io::ErrorKind::InvalidData, format!($fmt, $($arg)*));
    };
}

pub use epmd::EpmdClient;
pub use message::Message;
pub use handshake::Handshake;

pub mod epmd;
pub mod channel;
pub mod message;
pub mod handshake;

/// The generation number of a distributed node.
///
/// If a node restarts, the count will be incremented.
///
/// Note the counter will wrap around, if it exceeds four.
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Creation(u8);
impl Creation {
    fn from_u16(c: u16) -> Option<Self> {
        if c < 4 { Some(Creation(c as u8)) } else { None }
    }

    /// Returns the inner counter value of this `Creation`.
    ///
    /// The range of this value is limited to `0..4`.
    pub fn as_u8(&self) -> u8 {
        self.0
    }
}

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {}
}