use std::fmt;
use std::str::FromStr;
/// A Mime charset.
///
/// The string representation is normalised 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, PartialEq)]
pub struct Charset(Charset_);
impl Charset {
/// US ASCII
pub const US_ASCII: Charset = Charset(Charset_::Us_Ascii);
/// ISO-8859-1
pub const ISO_8859_1: Charset = Charset(Charset_::Iso_8859_1);
/// ISO-8859-2
pub const ISO_8859_2: Charset = Charset(Charset_::Iso_8859_2);
/// ISO-8859-3
pub const ISO_8859_3: Charset = Charset(Charset_::Iso_8859_3);
/// ISO-8859-4
pub const ISO_8859_4: Charset = Charset(Charset_::Iso_8859_4);
/// ISO-8859-5
pub const ISO_8859_5: Charset = Charset(Charset_::Iso_8859_5);
/// ISO-8859-6
pub const ISO_8859_6: Charset = Charset(Charset_::Iso_8859_6);
/// ISO-8859-7
pub const ISO_8859_7: Charset = Charset(Charset_::Iso_8859_7);
/// ISO-8859-8
pub const ISO_8859_8: Charset = Charset(Charset_::Iso_8859_8);
/// ISO-8859-9
pub const ISO_8859_9: Charset = Charset(Charset_::Iso_8859_9);
/// ISO-8859-10
pub const ISO_8859_10: Charset = Charset(Charset_::Iso_8859_10);
/// Shift_JIS
pub const SHIFT_JIS: Charset = Charset(Charset_::Shift_Jis);
/// EUC-JP
pub const EUC_JP: Charset = Charset(Charset_::Euc_Jp);
/// ISO-2022-KR
pub const ISO_2022_KR: Charset = Charset(Charset_::Iso_2022_Kr);
/// EUC-KR
pub const EUC_KR: Charset: Charset(Charset_::Euc_Kr);
/// ISO-2022-JP
pub const ISO_2022_JP: Charset = Charset(Charset_::Iso_2022_Jp);
/// ISO-2022-JP-2
pub const ISO_2022_JP_2: Charset = Charset(Charset_::Iso_2022_Jp_2);
/// ISO-8859-6-E
pub const ISO_8859_6_E: Charset = Charset(Charset_::Iso_8859_6_E);
/// ISO-8859-6-I
pub const ISO_8859_6_I: Charset = Charset(Charset_::Iso_8859_6_I);
/// ISO-8859-8-E
pub const ISO_8859_8_E: Charset = Charset(Charset_::Iso_8859_8_E);
/// ISO-8859-8-I
pub const ISO_8859_8_I: Charset = Charset(Charset_::Iso_8859_8_I);
/// GB2312
pub const GB_2312: Charset = Charset(Charset_::Gb2312);
/// Big5
pub const BIG_5: Charset = Charset(Charset_::Big5);
/// KOI8-R
pub const KOI8_R: Charset = Charset(Charset_::Koi8_R);
}
#[derive(Clone, Debug, PartialEq)]
#[allow(non_camel_case_types)]
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,
_Unknown,
}
impl Charset {
fn name(&self) -> &'static str {
match self.0 {
Charset_::Us_Ascii => "US-ASCII",
Charset_::Iso_8859_1 => "ISO-8859-1",
Charset_::Iso_8859_2 => "ISO-8859-2",
Charset_::Iso_8859_3 => "ISO-8859-3",
Charset_::Iso_8859_4 => "ISO-8859-4",
Charset_::Iso_8859_5 => "ISO-8859-5",
Charset_::Iso_8859_6 => "ISO-8859-6",
Charset_::Iso_8859_7 => "ISO-8859-7",
Charset_::Iso_8859_8 => "ISO-8859-8",
Charset_::Iso_8859_9 => "ISO-8859-9",
Charset_::Iso_8859_10 => "ISO-8859-10",
Charset_::Shift_Jis => "Shift-JIS",
Charset_::Euc_Jp => "EUC-JP",
Charset_::Iso_2022_Kr => "ISO-2022-KR",
Charset_::Euc_Kr => "EUC-KR",
Charset_::Iso_2022_Jp => "ISO-2022-JP",
Charset_::Iso_2022_Jp_2 => "ISO-2022-JP-2",
Charset_::Iso_8859_6_E => "ISO-8859-6-E",
Charset_::Iso_8859_6_I => "ISO-8859-6-I",
Charset_::Iso_8859_8_E => "ISO-8859-8-E",
Charset_::Iso_8859_8_I => "ISO-8859-8-I",
Charset_::Gb2312 => "GB2312",
Charset_::Big5 => "5",
Charset_::Koi8_R => "KOI8-R",
Charset_::_Unknown => unreachable!("Charset::_Unknown"),
}
}
}
impl fmt::Display for Charset {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(self.name())
}
}
#[derive(Debug)]
pub struct CharsetFromStrError(());
impl FromStr for Charset {
type Err = CharsetFromStrError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(Charset(match s.to_ascii_uppercase().as_ref() {
"US-ASCII" => Charset_::Us_Ascii,
"ISO-8859-1" => Charset_::Iso_8859_1,
"ISO-8859-2" => Charset_::Iso_8859_2,
"ISO-8859-3" => Charset_::Iso_8859_3,
"ISO-8859-4" => Charset_::Iso_8859_4,
"ISO-8859-5" => Charset_::Iso_8859_5,
"ISO-8859-6" => Charset_::Iso_8859_6,
"ISO-8859-7" => Charset_::Iso_8859_7,
"ISO-8859-8" => Charset_::Iso_8859_8,
"ISO-8859-9" => Charset_::Iso_8859_9,
"ISO-8859-10" => Charset_::Iso_8859_10,
"SHIFT-JIS" => Charset_::Shift_Jis,
"EUC-JP" => Charset_::Euc_Jp,
"ISO-2022-KR" => Charset_::Iso_2022_Kr,
"EUC-KR" => Charset_::Euc_Kr,
"ISO-2022-JP" => Charset_::Iso_2022_Jp,
"ISO-2022-JP-2" => Charset_::Iso_2022_Jp_2,
"ISO-8859-6-E" => Charset_::Iso_8859_6_E,
"ISO-8859-6-I" => Charset_::Iso_8859_6_I,
"ISO-8859-8-E" => Charset_::Iso_8859_8_E,
"ISO-8859-8-I" => Charset_::Iso_8859_8_I,
"GB2312" => Charset_::Gb2312,
"5" => Charset_::Big5,
"KOI8-R" => Charset_::Koi8_R,
_unknown => return Err(CharsetFromStrError(())),
}))
}
}
#[test]
fn test_parse() {
assert_eq!(Charset::US_ASCII,"us-ascii".parse().unwrap());
assert_eq!(Charset::US_ASCII,"US-Ascii".parse().unwrap());
assert_eq!(Charset::US_ASCII,"US-ASCII".parse().unwrap());
assert_eq!(Charset::SHIFT_JIS,"Shift-JIS".parse().unwrap());
assert!("abcd".parse(::<Charset>().is_err());
}
#[test]
fn test_display() {
assert_eq!("US-ASCII", format!("{}", Charset::US_ASCII));
}
