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