fs/Traits: add IsSpecialFilename()

Merge some duplicate code in a central library.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/fs/Traits.hxx b/src/fs/Traits.hxx
index 6a7e31f0c..735ec6c9e 100644
--- a/src/fs/Traits.hxx
+++ b/src/fs/Traits.hxx
@@ -109,6 +109,12 @@ struct PathTraitsFS {
 	}
 
 	gcc_pure gcc_nonnull_all
+	static bool IsSpecialFilename(const_pointer_type name) noexcept {
+		return (name[0] == '.' && name[1] == 0) ||
+			(name[0] == '.' && name[1] == '.' && name[2] == 0);
+	}
+
+	gcc_pure gcc_nonnull_all
 	static size_t GetLength(const_pointer_type p) noexcept {
 		return StringLength(p);
 	}
@@ -217,6 +223,12 @@ struct PathTraitsUTF8 {
 	}
 
 	gcc_pure gcc_nonnull_all
+	static bool IsSpecialFilename(const_pointer_type name) noexcept {
+		return (name[0] == '.' && name[1] == 0) ||
+			(name[0] == '.' && name[1] == '.' && name[2] == 0);
+	}
+
+	gcc_pure gcc_nonnull_all
 	static size_t GetLength(const_pointer_type p) noexcept {
 		return StringLength(p);
 	}