1 files changed, 32 insertions, 0 deletions
diff --git a/vendor/gix-validate/src/submodule.rs b/vendor/gix-validate/src/submodule.rs
new file mode 100644
index 000000000..6811f4ff2
--- /dev/null
+++ b/vendor/gix-validate/src/submodule.rs
@@ -0,0 +1,32 @@
+use bstr::{BStr, ByteSlice};
+
+///
+pub mod name {
+    /// The error used in [name()](super::name()).
+    #[derive(Debug, thiserror::Error)]
+    #[allow(missing_docs)]
+    pub enum Error {
+        #[error("Submodule names cannot be empty")]
+        Empty,
+        #[error("Submodules names must not contains '..'")]
+        ParentComponent,
+    }
+}
+
+/// Return the original `name` if it is valid, or the respective error indicating what was wrong with it.
+pub fn name(name: &BStr) -> Result<&BStr, name::Error> {
+    if name.is_empty() {
+        return Err(name::Error::Empty);
+    }
+    match name.find(b"..") {
+        Some(pos) => {
+            let &b = name.get(pos + 2).ok_or(name::Error::ParentComponent)?;
+            if b == b'/' || b == b'\\' {
+                Err(name::Error::ParentComponent)
+            } else {
+                Ok(name)
+            }
+        }
+        None => Ok(name),
+    }
+}