diff options
Diffstat (limited to 'vendor/unicode-bom/src/lib.rs')
| -rw-r--r-- | vendor/unicode-bom/src/lib.rs | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/vendor/unicode-bom/src/lib.rs b/vendor/unicode-bom/src/lib.rs index eae541106..6c8ba03d7 100644 --- a/vendor/unicode-bom/src/lib.rs +++ b/vendor/unicode-bom/src/lib.rs @@ -128,6 +128,35 @@ impl AsRef<str> for Bom { } } +impl AsRef<[u8]> for Bom { + /// Returns the BOM byte-array literal. + /// + /// Note that for UTF-7, + /// only the first three bytes of the BOM are returned. + /// That's because the last two bits of the fourth byte + /// belong to the following character, + /// so it's impossible to return the fourth byte + /// without further context. + /// Possible values for the missing fourth byte + /// are `0x38`, `0x39`, `0x2a` and `0x2b`. + fn as_ref(&self) -> &[u8] { + match *self { + Bom::Null => &[], + Bom::Bocu1 => &[0xfb, 0xee, 0x28], + Bom::Gb18030 => &[0x84, 0x31, 0x95, 0x33], + Bom::Scsu => &[0x0e, 0xfe, 0xff], + Bom::UtfEbcdic => &[0xdd, 0x73, 0x66, 0x73], + Bom::Utf1 => &[0xf7, 0x64, 0x4c], + Bom::Utf7 => &[0x2b, 0x2f, 0x76], + Bom::Utf8 => &[0xef, 0xbb, 0xbf], + Bom::Utf16Be => &[0xfe, 0xff], + Bom::Utf16Le => &[0xff, 0xfe], + Bom::Utf32Be => &[0, 0, 0xfe, 0xff], + Bom::Utf32Le => &[0xff, 0xfe, 0, 0], + } + } +} + impl Default for Bom { /// Returns the default/empty BOM type, `Bom::Null`. fn default() -> Self { @@ -138,7 +167,7 @@ impl Default for Bom { impl Display for Bom { /// Formats the BOM type as a `String`. fn fmt(&self, formatter: &mut Formatter) -> fmt::Result { - write!(formatter, "{}", self.as_ref()) + write!(formatter, "{}", AsRef::<str>::as_ref(self)) } } |