Restructure program

This commit also includes changes to devices according to the latest
devices specification, in particular the math and system devices.

1 files changed, 37 insertions, 0 deletions

diff --git a/src/types/entry_type.rs b/src/types/entry_type.rs
new file mode 100644
index 0000000..6a9ac2d
--- /dev/null
+++ b/src/types/entry_type.rs
@@ -0,0 +1,37 @@
+use crate::*;
+
+use std::cmp::Ordering;
+
+
+pub enum Entry {
+    File(BufferedFile),
+    Directory(DirectoryListing),
+}
+
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub enum EntryType {
+    File,
+    Directory,
+}
+
+impl PartialOrd for EntryType {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        match (self, other) {
+            (EntryType::Directory, EntryType::Directory) => Some(Ordering::Equal  ),
+            (EntryType::Directory, EntryType::File     ) => Some(Ordering::Less   ),
+            (EntryType::File,      EntryType::Directory) => Some(Ordering::Greater),
+            (EntryType::File,      EntryType::File     ) => Some(Ordering::Equal  ),
+        }
+    }
+}
+
+impl Ord for EntryType {
+    fn cmp(&self, other: &Self) -> Ordering {
+        match (self, other) {
+            (EntryType::Directory, EntryType::Directory) => Ordering::Equal  ,
+            (EntryType::Directory, EntryType::File     ) => Ordering::Less   ,
+            (EntryType::File,      EntryType::Directory) => Ordering::Greater,
+            (EntryType::File,      EntryType::File     ) => Ordering::Equal  ,
+        }
+    }
+}