pixelflut 0.2.0

An async/sync Pixelflut server/client library
Documentation 
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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

use std::convert::From;
use std::error;
use std::fmt;
use std::num::ParseIntError;
use std::result;
use std::str::Utf8Error;

/// Pixelflut [`Result`] alias
pub type PixelflutResult<T> = result::Result<T, PixelflutError>;

/// Pixelflut error type
///
/// Use [PixelflutErrorKind] to match specific errors.
pub struct PixelflutError {
    repr: Repr,
}

impl fmt::Debug for PixelflutError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        fmt::Debug::fmt(&self.repr, f)
    }
}

#[derive(Debug)]
enum Repr {
    Io(std::io::Error),
    ParseInt(ParseIntError),
    Utf8(Utf8Error),
    Simple(PixelflutErrorKind),
    Description(PixelflutErrorKind, &'static str),
}

#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum PixelflutErrorKind {
    Io,
    InvalidCommand,
    WrongNumberOfArguments,
    Parse,
    State,
    ServerError,
}

impl PixelflutErrorKind {
    pub(crate) fn as_str(self) -> &'static str {
        match self {
            PixelflutErrorKind::Io => "io error",
            PixelflutErrorKind::InvalidCommand => "invalid command",
            PixelflutErrorKind::WrongNumberOfArguments => "wrong number of arguments",
            PixelflutErrorKind::Parse => "parse error",
            PixelflutErrorKind::State => "invalid state",
            PixelflutErrorKind::ServerError => "got error from server",
        }
    }

    pub(crate) fn with_description(self, description: &'static str) -> PixelflutError {
        PixelflutError {
            repr: Repr::Description(self, description),
        }
    }
}

impl From<PixelflutErrorKind> for PixelflutError {
    #[inline]
    fn from(kind: PixelflutErrorKind) -> PixelflutError {
        PixelflutError {
            repr: Repr::Simple(kind),
        }
    }
}

impl PixelflutError {
    /// Returns the corresponding `ErrorKind` for this error.
    pub fn kind(&self) -> PixelflutErrorKind {
        match self.repr {
            Repr::Io(_) => PixelflutErrorKind::Io,
            Repr::ParseInt(_) => PixelflutErrorKind::Parse,
            Repr::Utf8(_) => PixelflutErrorKind::Parse,
            Repr::Simple(kind) => kind,
            Repr::Description(kind, _) => kind,
        }
    }
}

impl fmt::Display for PixelflutError {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        match self.repr {
            Repr::Io(ref err) => write!(fmt, "io error: {}", err),
            Repr::ParseInt(ref err) => write!(fmt, "parse int error: {}", err),
            Repr::Utf8(err) => write!(fmt, "utf8 error: {}", err),
            Repr::Simple(kind) => write!(fmt, "{}", kind.as_str()),
            Repr::Description(kind, description) => {
                write!(fmt, "{}: {}", kind.as_str(), description)
            }
        }
    }
}

impl error::Error for PixelflutError {
    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
        match self.repr {
            Repr::Io(ref err) => err.source(),
            Repr::ParseInt(ref err) => err.source(),
            Repr::Utf8(ref err) => err.source(),
            Repr::Simple(..) => None,
            Repr::Description(..) => None,
        }
    }
}

impl From<std::io::Error> for PixelflutError {
    fn from(err: std::io::Error) -> PixelflutError {
        PixelflutError {
            repr: Repr::Io(err),
        }
    }
}

impl From<ParseIntError> for PixelflutError {
    fn from(err: ParseIntError) -> PixelflutError {
        PixelflutError {
            repr: Repr::ParseInt(err),
        }
    }
}

impl From<Utf8Error> for PixelflutError {
    fn from(err: Utf8Error) -> PixelflutError {
        PixelflutError {
            repr: Repr::Utf8(err),
        }
    }
}

impl From<bstr::Utf8Error> for PixelflutError {
    fn from(_err: bstr::Utf8Error) -> PixelflutError {
        PixelflutErrorKind::Parse.with_description("UTF-8 error")
    }
}