Implement File::matches_with(&Regex)

src/storage/file.rs

@@ -266,6 +266,10 @@ impl File {
         self.id.clone()
     }
 
+    pub fn matches_with(&self, r: &Regex) -> bool {
+        r.is_match(&self.data[..]) || self.header.matches_with(r)
+    }
+
     fn get_new_file_id() -> FileID {
         use uuid::Uuid;
         Uuid::new_v4().to_hyphenated_string()