1 files changed, 29 insertions, 0 deletions
diff --git a/src/indexes/file_name.rs b/src/indexes/file_name.rs
index 069836a..5f77bc7 100644
--- a/src/indexes/file_name.rs
+++ b/src/indexes/file_name.rs
@@ -1,12 +1,41 @@
 // Copyright 2021 Colin Finck <colin@reactos.org>
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+use crate::error::Result;
+use crate::index::NtfsIndexFinder;
+use crate::index_entry::NtfsIndexEntry;
 use crate::indexes::{NtfsIndexEntryHasFileReference, NtfsIndexEntryType};
+use crate::ntfs::Ntfs;
+use crate::string::UpcaseOrd;
 use crate::structured_values::NtfsFileName;
+use binread::io::{Read, Seek};
 
+/// Defines the [`NtfsIndexEntryType`] for filename indexes (more commonly known as "directories").
 #[derive(Debug)]
 pub struct NtfsFileNameIndex {}
 
+impl NtfsFileNameIndex {
+    /// Finds a file in a filename index by name and returns the [`NtfsIndexEntry`] (if any).
+    /// The name is compared case-insensitively based on the filesystem's $UpCase table.
+    ///
+    /// # Panics
+    ///
+    /// Panics if [`read_upcase_table`][Ntfs::read_upcase_table] had not been called on the passed [`Ntfs`] object.
+    pub fn find<'a, 'n, T>(
+        index_finder: &'a mut NtfsIndexFinder<Self>,
+        ntfs: &'n Ntfs,
+        fs: &mut T,
+        name: &str,
+    ) -> Option<Result<NtfsIndexEntry<'a, Self>>>
+    where
+        T: Read + Seek,
+    {
+        // TODO: This always performs a case-insensitive comparison.
+        // There are some corner cases where NTFS uses case-sensitive filenames. These need to be considered!
+        index_finder.find(fs, |file_name| name.upcase_cmp(ntfs, &file_name.name()))
+    }
+}
+
 impl NtfsIndexEntryType for NtfsFileNameIndex {
     type KeyType = NtfsFileName;
 }