use std::error::Error as StdError;
use std::io::Error as IoError;
#[derive(Debug)]
pub enum Error {
Unknown,
NoDriver,
NotFile,
NotLive,
BadOption,
OpenDevice,
OpenFile,
FileExists,
BadFormat,
}
impl Error {
pub fn from_errno() -> Self {
match IoError::last_os_error().raw_os_error() {
Some(e) => Self::from_u32(e as u32),
None => Error::Unknown,
}
}
pub fn from_u32(code: u32) -> Self {
match code {
1 => Error::NoDriver,
2 => Error::NotFile,
3 => Error::NotLive,
4 => Error::BadOption,
5 => Error::OpenDevice,
6 => Error::OpenFile,
7 => Error::FileExists,
8 => Error::BadFormat,
_ => Error::Unknown,
}
}
pub fn to_str(&self) -> &str {
match *self {
Error::Unknown => "Unknown",
Error::NoDriver => "No driver",
Error::NotFile => "No file",
Error::NotLive => "Not live",
Error::BadOption => "Bad option",
Error::OpenDevice => "Can't open device",
Error::OpenFile => "Cant' open file",
Error::FileExists => "File exists",
Error::BadFormat => "Bad format",
}
}
}
impl StdError for Error {
fn description(&self) -> &str {
self.to_str()
}
}
impl ::std::fmt::Display for Error {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, "{:?}", self)
}
}
impl From<u32> for Error {
fn from(code: u32) -> Self {
Error::from_u32(code)
}
}