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157 lines
4 KiB
Rust
157 lines
4 KiB
Rust
use std::fmt::{self, Display};
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use std::str::FromStr;
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use self::Charset::*;
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/// A Mime charset.
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///
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/// The string representation is normalized to upper case.
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///
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/// See <http://www.iana.org/assignments/character-sets/character-sets.xhtml>.
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#[derive(Clone, Debug, PartialEq)]
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#[allow(non_camel_case_types)]
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pub enum Charset {
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/// US ASCII
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Us_Ascii,
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/// ISO-8859-1
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Iso_8859_1,
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/// ISO-8859-2
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Iso_8859_2,
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/// ISO-8859-3
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Iso_8859_3,
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/// ISO-8859-4
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Iso_8859_4,
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/// ISO-8859-5
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Iso_8859_5,
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/// ISO-8859-6
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Iso_8859_6,
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/// ISO-8859-7
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Iso_8859_7,
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/// ISO-8859-8
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Iso_8859_8,
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/// ISO-8859-9
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Iso_8859_9,
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/// ISO-8859-10
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Iso_8859_10,
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/// Shift_JIS
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Shift_Jis,
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/// EUC-JP
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Euc_Jp,
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/// ISO-2022-KR
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Iso_2022_Kr,
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/// EUC-KR
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Euc_Kr,
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/// ISO-2022-JP
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Iso_2022_Jp,
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/// ISO-2022-JP-2
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Iso_2022_Jp_2,
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/// ISO-8859-6-E
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Iso_8859_6_E,
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/// ISO-8859-6-I
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Iso_8859_6_I,
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/// ISO-8859-8-E
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Iso_8859_8_E,
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/// ISO-8859-8-I
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Iso_8859_8_I,
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/// GB2312
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Gb2312,
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/// Big5
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Big5,
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/// KOI8-R
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Koi8_R,
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/// An arbitrary charset specified as a string
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Ext(String),
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}
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impl Charset {
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fn label(&self) -> &str {
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match *self {
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Us_Ascii => "US-ASCII",
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Iso_8859_1 => "ISO-8859-1",
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Iso_8859_2 => "ISO-8859-2",
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Iso_8859_3 => "ISO-8859-3",
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Iso_8859_4 => "ISO-8859-4",
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Iso_8859_5 => "ISO-8859-5",
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Iso_8859_6 => "ISO-8859-6",
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Iso_8859_7 => "ISO-8859-7",
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Iso_8859_8 => "ISO-8859-8",
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Iso_8859_9 => "ISO-8859-9",
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Iso_8859_10 => "ISO-8859-10",
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Shift_Jis => "Shift-JIS",
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Euc_Jp => "EUC-JP",
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Iso_2022_Kr => "ISO-2022-KR",
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Euc_Kr => "EUC-KR",
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Iso_2022_Jp => "ISO-2022-JP",
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Iso_2022_Jp_2 => "ISO-2022-JP-2",
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Iso_8859_6_E => "ISO-8859-6-E",
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Iso_8859_6_I => "ISO-8859-6-I",
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Iso_8859_8_E => "ISO-8859-8-E",
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Iso_8859_8_I => "ISO-8859-8-I",
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Gb2312 => "GB2312",
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Big5 => "Big5",
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Koi8_R => "KOI8-R",
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Ext(ref s) => s,
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}
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}
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}
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impl Display for Charset {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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f.write_str(self.label())
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}
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}
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impl FromStr for Charset {
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type Err = crate::Error;
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fn from_str(s: &str) -> Result<Charset, crate::Error> {
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Ok(match s.to_ascii_uppercase().as_ref() {
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"US-ASCII" => Us_Ascii,
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"ISO-8859-1" => Iso_8859_1,
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"ISO-8859-2" => Iso_8859_2,
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"ISO-8859-3" => Iso_8859_3,
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"ISO-8859-4" => Iso_8859_4,
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"ISO-8859-5" => Iso_8859_5,
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"ISO-8859-6" => Iso_8859_6,
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"ISO-8859-7" => Iso_8859_7,
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"ISO-8859-8" => Iso_8859_8,
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"ISO-8859-9" => Iso_8859_9,
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"ISO-8859-10" => Iso_8859_10,
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"SHIFT-JIS" => Shift_Jis,
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"EUC-JP" => Euc_Jp,
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"ISO-2022-KR" => Iso_2022_Kr,
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"EUC-KR" => Euc_Kr,
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"ISO-2022-JP" => Iso_2022_Jp,
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"ISO-2022-JP-2" => Iso_2022_Jp_2,
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"ISO-8859-6-E" => Iso_8859_6_E,
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"ISO-8859-6-I" => Iso_8859_6_I,
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"ISO-8859-8-E" => Iso_8859_8_E,
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"ISO-8859-8-I" => Iso_8859_8_I,
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"GB2312" => Gb2312,
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"BIG5" => Big5,
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"KOI8-R" => Koi8_R,
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s => Ext(s.to_owned()),
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})
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_parse() {
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assert_eq!(Us_Ascii, "us-ascii".parse().unwrap());
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assert_eq!(Us_Ascii, "US-Ascii".parse().unwrap());
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assert_eq!(Us_Ascii, "US-ASCII".parse().unwrap());
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assert_eq!(Shift_Jis, "Shift-JIS".parse().unwrap());
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assert_eq!(Ext("ABCD".to_owned()), "abcd".parse().unwrap());
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}
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#[test]
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fn test_display() {
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assert_eq!("US-ASCII", format!("{}", Us_Ascii));
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assert_eq!("ABCD", format!("{}", Ext("ABCD".to_owned())));
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}
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}
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