1 files changed, 37 insertions, 0 deletions
diff --git a/src/notes.rs b/src/notes.rs
new file mode 100644
index 0000000..7390dcc
--- /dev/null
+++ b/src/notes.rs
@@ -0,0 +1,37 @@
+// This file is part of Guitar <https://github.com/Fuwn/guitar>.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// Copyright (C) 2022-2022 Fuwn <[email protected]>
+// SPDX-License-Identifier: GPL-3.0-only
+
+use std::collections::HashMap;
+
+use once_cell::sync::Lazy;
+
+pub const NOTES: [&str; 12] = [
+  "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B",
+];
+
+pub static NOTES_OFFSET: Lazy<HashMap<String, i8>> = Lazy::new(|| {
+  let mut notes = HashMap::new();
+  let mut i = -9;
+
+  for note in NOTES {
+    notes.insert(note.to_string(), i);
+
+    i += 1;
+  }
+
+  notes
+});