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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57

use std::{fmt, error, io};
use multibase;
use multihash;

pub type Result<T> = ::std::result::Result<T, Error>;

/// Error types
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
pub enum Error {
    UnknownCodec,
    InputTooShort,
    ParsingError,
    InvalidCidVersion,
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(error::Error::description(self))
    }
}

impl error::Error for Error {
    fn description(&self) -> &str {
        use self::Error::*;

        match *self {
            UnknownCodec => "Unknown codec",
            InputTooShort => "Input too short",
            ParsingError => "Failed to parse multihash",
            InvalidCidVersion => "Unrecognized CID version",
        }
    }
}

impl From<io::Error> for Error {
    fn from(_: io::Error) -> Error {
        Error::ParsingError
    }
}

impl From<multibase::Error> for Error {
    fn from(_: multibase::Error) -> Error {
        Error::ParsingError
    }
}

impl From<multihash::Error> for Error {
    fn from(_: multihash::Error) -> Error {
        Error::ParsingError
    }
}

impl From<Error> for fmt::Error {
    fn from(_: Error) -> fmt::Error {
        fmt::Error {}
    }
}