serde_bencoded/
error.rs

1use std::fmt::Display;
2
3use serde::{de, ser};
4
5pub type SerResult<T> = std::result::Result<T, SerError>;
6pub type DeResult<T> = std::result::Result<T, DeError>;
7
8#[derive(Debug, Clone, PartialEq)]
9pub enum SerError {
10    Message(String),
11    FloatingPointNotSupported,
12    Io(String),
13    DictionaryKeyMustBeString,
14    /// Wrapper for [`FromUtf8Error`](std::string::FromUtf8Error)
15    FromUtf8Error(std::string::FromUtf8Error),
16    NoneNotSupported,
17}
18#[derive(Debug, Clone, PartialEq)]
19pub enum DeError {
20    Message(String),
21    UnexpectedEof,
22    /// (got byte, expected byte if some)
23    SyntaxError(u8, Option<u8>),
24    /// Wrapper for [`ParseIntegerError`](btoi::ParseIntegerError)
25    ParseIntegerError(btoi::ParseIntegerError),
26    /// Wrapper for [`Utf8Error`](std::str::Utf8Error)
27    Utf8Error(std::str::Utf8Error),
28    ExpectedString,
29    ExpectedDictionary,
30    ExpectedEndOfDictionary,
31    ExpectedUnitStructName,
32    ExpectedInteger,
33    /// String with length at most 4
34    ExpectedCharString,
35}
36
37impl From<btoi::ParseIntegerError> for DeError {
38    fn from(e: btoi::ParseIntegerError) -> Self {
39        DeError::ParseIntegerError(e)
40    }
41}
42
43impl From<std::str::Utf8Error> for DeError {
44    fn from(x: std::str::Utf8Error) -> Self {
45        DeError::Utf8Error(x)
46    }
47}
48
49impl From<std::io::Error> for SerError {
50    fn from(ioe: std::io::Error) -> Self {
51        SerError::Io(ioe.to_string())
52    }
53}
54
55impl From<std::string::FromUtf8Error> for SerError {
56    fn from(ue: std::string::FromUtf8Error) -> Self {
57        SerError::FromUtf8Error(ue)
58    }
59}
60
61impl ser::Error for SerError {
62    fn custom<T>(msg: T) -> Self
63    where
64        T: std::fmt::Display,
65    {
66        SerError::Message(msg.to_string())
67    }
68}
69
70impl de::Error for DeError {
71    fn custom<T>(msg: T) -> Self
72    where
73        T: std::fmt::Display,
74    {
75        DeError::Message(msg.to_string())
76    }
77}
78
79impl Display for SerError {
80    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
81        match self {
82            SerError::Message(s) => f.write_str(s),
83            SerError::Io(io) => f.write_str(io),
84            SerError::DictionaryKeyMustBeString => {
85                f.write_str("only byte strings allowed to be keys in dictionary")
86            }
87            SerError::FloatingPointNotSupported => {
88                f.write_str("floating point numbers are not supported")
89            }
90            SerError::FromUtf8Error(ue) => f.write_fmt(format_args!("{}", ue)),
91            SerError::NoneNotSupported => f.write_str("`None` variant of `Option` is not supported, perhaps you need `#[serde(skip_serializing_if = \"Option::is_none\")]`")
92            }
93    }
94}
95
96impl Display for DeError {
97    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
98        match self {
99            DeError::Message(s) => f.write_str(s),
100            DeError::UnexpectedEof => f.write_str("unexpected EOF"),
101            DeError::SyntaxError(expected, got) => f.write_fmt(format_args!(
102                "syntax error: expected - {}, got - {:?}",
103                *expected as char, got
104            )),
105            DeError::ParseIntegerError(pie) => f.write_fmt(format_args!("{}", pie)),
106            DeError::Utf8Error(ue) => f.write_fmt(format_args!("{}", ue)),
107            DeError::ExpectedString => f.write_str("expected byte string"),
108            DeError::ExpectedDictionary => f.write_str("expected dictionary"),
109            DeError::ExpectedEndOfDictionary => f.write_str("expected enf of dictionary"),
110            DeError::ExpectedUnitStructName => f.write_str("expected name of the unit struct"),
111            DeError::ExpectedCharString => {
112                f.write_str("expected byte string with length at most 4 bytes")
113            }
114            DeError::ExpectedInteger => f.write_str("expected integer"),
115        }
116    }
117}
118
119impl std::error::Error for SerError {}
120impl std::error::Error for DeError {}
serde_bencoded/error.rs

serde_bencoded/
error.rs
