quick_protobuf/
errors.rs

1//! A module to handle all errors
2
3/// An error enum
4#[derive(Debug)]
5pub enum Error {
6    /// Io error
7    #[cfg(feature = "std")]
8    Io(std::io::Error),
9    /// Io error
10    #[cfg(not(feature = "std"))]
11    Io,
12    /// Utf8 Error
13    Utf8(::core::str::Utf8Error),
14    /// Deprecated feature (in protocol buffer specification)
15    Deprecated(&'static str),
16    /// Unknown wire type
17    UnknownWireType(u8),
18    /// Varint decoding error
19    Varint,
20    /// Error while parsing protocol buffer message
21    #[cfg(feature = "std")]
22    Message(String),
23    /// Unexpected map tag
24    Map(u8),
25    /// Out of data when reading from or writing to a byte buffer
26    UnexpectedEndOfBuffer,
27    /// The supplied output buffer is not large enough to serialize the message
28    OutputBufferTooSmall,
29}
30
31/// A wrapper for `Result<T, Error>`
32pub type Result<T> = ::core::result::Result<T, Error>;
33
34#[cfg(feature = "std")]
35impl Into<std::io::Error> for Error {
36    fn into(self) -> ::std::io::Error {
37        match self {
38            Error::Io(x) => x,
39            Error::Utf8(x) => std::io::Error::new(std::io::ErrorKind::InvalidData, x),
40            x => std::io::Error::new(std::io::ErrorKind::Other, x),
41        }
42    }
43}
44
45#[cfg(feature = "std")]
46impl From<std::io::Error> for Error {
47    fn from(e: std::io::Error) -> Error {
48        Error::Io(e)
49    }
50}
51
52impl From<::core::str::Utf8Error> for Error {
53    fn from(e: ::core::str::Utf8Error) -> Error {
54        Error::Utf8(e)
55    }
56}
57
58#[cfg(feature = "std")]
59impl std::error::Error for Error {
60    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
61        match self {
62            Error::Io(e) => Some(e),
63            Error::Utf8(e) => Some(e),
64            _ => None,
65        }
66    }
67}
68
69impl core::fmt::Display for Error {
70    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
71        match self {
72            #[cfg(feature = "std")]
73            Error::Io(e) => write!(f, "{}", e),
74            #[cfg(not(feature = "std"))]
75            Error::Io => write!(f, "IO error"),
76            Error::Utf8(e) => write!(f, "{}", e),
77            Error::Deprecated(feature) => write!(f, "Feature '{}' has been deprecated", feature),
78            Error::UnknownWireType(e) => {
79                write!(f, "Unknown wire type '{}', must be less than 6", e)
80            }
81            Error::Varint => write!(f, "Cannot decode varint"),
82            #[cfg(feature = "std")]
83            Error::Message(msg) => write!(f, "Error while parsing message: {}", msg),
84            Error::Map(tag) => write!(f, "Unexpected map tag: '{}', expecting 1 or 2", tag),
85            Error::UnexpectedEndOfBuffer => write!(f, "Unexpected end of buffer"),
86            Error::OutputBufferTooSmall => write!(f, "Output buffer too small"),
87        }
88    }
89}
quick_protobuf/errors.rs

quick_protobuf/
errors.rs
