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
139
140
141
142
143
144
145
146
147
148
149
150
151
152

use std::fmt::{self, Display};
use std::str::FromStr;

use self::Charset::*;

/// A Mime charset.
///
/// The string representation is normalized to upper case.
///
/// See [http://www.iana.org/assignments/character-sets/character-sets.xhtml][url].
///
/// [url]: http://www.iana.org/assignments/character-sets/character-sets.xhtml
#[derive(Clone, Debug, PartialEq)]
#[allow(non_camel_case_types)]
pub enum Charset {
    /// US ASCII
    Us_Ascii,
    /// ISO-8859-1
    Iso_8859_1,
    /// ISO-8859-2
    Iso_8859_2,
    /// ISO-8859-3
    Iso_8859_3,
    /// ISO-8859-4
    Iso_8859_4,
    /// ISO-8859-5
    Iso_8859_5,
    /// ISO-8859-6
    Iso_8859_6,
    /// ISO-8859-7
    Iso_8859_7,
    /// ISO-8859-8
    Iso_8859_8,
    /// ISO-8859-9
    Iso_8859_9,
    /// ISO-8859-10
    Iso_8859_10,
    /// Shift_JIS
    Shift_Jis,
    /// EUC-JP
    Euc_Jp,
    /// ISO-2022-KR
    Iso_2022_Kr,
    /// EUC-KR
    Euc_Kr,
    /// ISO-2022-JP
    Iso_2022_Jp,
    /// ISO-2022-JP-2
    Iso_2022_Jp_2,
    /// ISO-8859-6-E
    Iso_8859_6_E,
    /// ISO-8859-6-I
    Iso_8859_6_I,
    /// ISO-8859-8-E
    Iso_8859_8_E,
    /// ISO-8859-8-I
    Iso_8859_8_I,
    /// GB2312
    Gb2312,
    /// Big5
    Big5,
    /// KOI8-R
    Koi8_R,
    /// An arbitrary charset specified as a string
    Ext(String),
}

impl Charset {
    fn label(&self) -> &str {
        match *self {
            Us_Ascii => "US-ASCII",
            Iso_8859_1 => "ISO-8859-1",
            Iso_8859_2 => "ISO-8859-2",
            Iso_8859_3 => "ISO-8859-3",
            Iso_8859_4 => "ISO-8859-4",
            Iso_8859_5 => "ISO-8859-5",
            Iso_8859_6 => "ISO-8859-6",
            Iso_8859_7 => "ISO-8859-7",
            Iso_8859_8 => "ISO-8859-8",
            Iso_8859_9 => "ISO-8859-9",
            Iso_8859_10 => "ISO-8859-10",
            Shift_Jis => "Shift-JIS",
            Euc_Jp => "EUC-JP",
            Iso_2022_Kr => "ISO-2022-KR",
            Euc_Kr => "EUC-KR",
            Iso_2022_Jp => "ISO-2022-JP",
            Iso_2022_Jp_2 => "ISO-2022-JP-2",
            Iso_8859_6_E => "ISO-8859-6-E",
            Iso_8859_6_I => "ISO-8859-6-I",
            Iso_8859_8_E => "ISO-8859-8-E",
            Iso_8859_8_I => "ISO-8859-8-I",
            Gb2312 => "GB2312",
            Big5 => "big5",
            Koi8_R => "KOI8-R",
            Ext(ref s) => s,
        }
    }
}

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

impl FromStr for Charset {
    type Err = ::Error;
    fn from_str(s: &str) -> ::Result<Charset> {
        Ok(match s.to_ascii_uppercase().as_ref() {
            "US-ASCII" => Us_Ascii,
            "ISO-8859-1" => Iso_8859_1,
            "ISO-8859-2" => Iso_8859_2,
            "ISO-8859-3" => Iso_8859_3,
            "ISO-8859-4" => Iso_8859_4,
            "ISO-8859-5" => Iso_8859_5,
            "ISO-8859-6" => Iso_8859_6,
            "ISO-8859-7" => Iso_8859_7,
            "ISO-8859-8" => Iso_8859_8,
            "ISO-8859-9" => Iso_8859_9,
            "ISO-8859-10" => Iso_8859_10,
            "SHIFT-JIS" => Shift_Jis,
            "EUC-JP" => Euc_Jp,
            "ISO-2022-KR" => Iso_2022_Kr,
            "EUC-KR" => Euc_Kr,
            "ISO-2022-JP" => Iso_2022_Jp,
            "ISO-2022-JP-2" => Iso_2022_Jp_2,
            "ISO-8859-6-E" => Iso_8859_6_E,
            "ISO-8859-6-I" => Iso_8859_6_I,
            "ISO-8859-8-E" => Iso_8859_8_E,
            "ISO-8859-8-I" => Iso_8859_8_I,
            "GB2312" => Gb2312,
            "big5" => Big5,
            "KOI8-R" => Koi8_R,
            s => Ext(s.to_owned()),
        })
    }
}

#[test]
fn test_parse() {
    assert_eq!(Us_Ascii, "us-ascii".parse().unwrap());
    assert_eq!(Us_Ascii, "US-Ascii".parse().unwrap());
    assert_eq!(Us_Ascii, "US-ASCII".parse().unwrap());
    assert_eq!(Shift_Jis, "Shift-JIS".parse().unwrap());
    assert_eq!(Ext("ABCD".to_owned()), "abcd".parse().unwrap());
}

#[test]
fn test_display() {
    assert_eq!("US-ASCII", format!("{}", Us_Ascii));
    assert_eq!("ABCD", format!("{}", Ext("ABCD".to_owned())));
}