1 files changed, 35 insertions, 0 deletions
diff --git a/vendor/gix-config/src/parse/key.rs b/vendor/gix-config/src/parse/key.rs
new file mode 100644
index 000000000..b0e0376be
--- /dev/null
+++ b/vendor/gix-config/src/parse/key.rs
@@ -0,0 +1,35 @@
+use bstr::{BStr, ByteSlice};
+
+/// An unvalidated parse result of parsing input like `remote.origin.url` or `core.bare`.
+#[derive(Debug, PartialEq, Ord, PartialOrd, Eq, Hash, Clone, Copy)]
+pub struct Key<'a> {
+    /// The name of the section, like `core` in `core.bare`.
+    pub section_name: &'a str,
+    /// The name of the sub-section, like `origin` in `remote.origin.url`.
+    pub subsection_name: Option<&'a BStr>,
+    /// The name of the section key, like `url` in `remote.origin.url`.
+    pub value_name: &'a str,
+}
+
+/// Parse `input` like `core.bare` or `remote.origin.url` as a `Key` to make its fields available,
+/// or `None` if there were not at least 2 tokens separated by `.`.
+/// Note that `input` isn't validated, and is `str` as ascii is a subset of UTF-8 which is required for any valid keys.
+pub fn parse_unvalidated<'a>(input: impl Into<&'a BStr>) -> Option<Key<'a>> {
+    let input = input.into();
+    let mut tokens = input.splitn(2, |b| *b == b'.');
+    let section_name = tokens.next()?;
+    let subsection_or_key = tokens.next()?;
+    let mut tokens = subsection_or_key.rsplitn(2, |b| *b == b'.');
+    let (subsection_name, value_name) = match (tokens.next(), tokens.next()) {
+        (Some(key), Some(subsection)) => (Some(subsection.into()), key),
+        (Some(key), None) => (None, key),
+        (None, Some(_)) => unreachable!("iterator can't restart producing items"),
+        (None, None) => return None,
+    };
+
+    Some(Key {
+        section_name: section_name.to_str().ok()?,
+        subsection_name,
+        value_name: value_name.to_str().ok()?,
+    })
+}