pub const BACKSPACE: u8 = 0x08;
pub const TABULATION: u8 = 0x09;
pub const LINE_FEED: u8 = 0x0A;
pub const CARRIAGE_RETURN: u8 = 0x0D;
pub const ESCAPE: u8 = 0x1B;

pub const CRLF: &str = "\r\n";