1 files changed, 74 insertions, 0 deletions
diff --git a/vendor/unic-langid-impl/src/subtags/region.rs b/vendor/unic-langid-impl/src/subtags/region.rs
new file mode 100644
index 000000000..f14ac21bf
--- /dev/null
+++ b/vendor/unic-langid-impl/src/subtags/region.rs
@@ -0,0 +1,74 @@
+use crate::parser::errors::ParserError;
+use std::str::FromStr;
+use tinystr::TinyStr4;
+
+#[derive(Debug, PartialEq, Eq, Clone, Hash, PartialOrd, Ord, Copy)]
+pub struct Region(TinyStr4);
+
+impl Region {
+    pub fn from_bytes(v: &[u8]) -> Result<Self, ParserError> {
+        let slen = v.len();
+
+        match slen {
+            2 => {
+                let s = TinyStr4::from_bytes(v).map_err(|_| ParserError::InvalidSubtag)?;
+                if !s.is_ascii_alphabetic() {
+                    return Err(ParserError::InvalidSubtag);
+                }
+                Ok(Self(s.to_ascii_uppercase()))
+            }
+            3 => {
+                let s = TinyStr4::from_bytes(v).map_err(|_| ParserError::InvalidSubtag)?;
+                if !s.is_ascii_numeric() {
+                    return Err(ParserError::InvalidSubtag);
+                }
+                Ok(Self(s))
+            }
+            _ => Err(ParserError::InvalidSubtag),
+        }
+    }
+
+    pub fn as_str(&self) -> &str {
+        self.0.as_str()
+    }
+
+    /// # Safety
+    ///
+    /// This function accepts any u64 that is exected to be a valid
+    /// `TinyStr4` and a valid `Region` subtag.
+    pub const unsafe fn from_raw_unchecked(v: u32) -> Self {
+        Self(TinyStr4::new_unchecked(v))
+    }
+}
+
+impl From<Region> for u32 {
+    fn from(input: Region) -> Self {
+        input.0.into()
+    }
+}
+
+impl<'l> From<&'l Region> for &'l str {
+    fn from(input: &'l Region) -> Self {
+        input.0.as_str()
+    }
+}
+
+impl FromStr for Region {
+    type Err = ParserError;
+
+    fn from_str(source: &str) -> Result<Self, Self::Err> {
+        Self::from_bytes(source.as_bytes())
+    }
+}
+
+impl std::fmt::Display for Region {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        f.write_str(&self.0)
+    }
+}
+
+impl PartialEq<&str> for Region {
+    fn eq(&self, other: &&str) -> bool {
+        self.as_str() == *other
+    }
+}