1 files changed, 54 insertions, 0 deletions
diff --git a/quantum/modifiers.h b/quantum/modifiers.h
new file mode 100644
index 0000000000..45bcd6508d
--- /dev/null
+++ b/quantum/modifiers.h
@@ -0,0 +1,54 @@
+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+/** \brief 5-bit packed modifiers
+ *
+ * Mod bits:    43210
+ *   bit 0      ||||+- Control
+ *   bit 1      |||+-- Shift
+ *   bit 2      ||+--- Alt
+ *   bit 3      |+---- Gui
+ *   bit 4      +----- LR flag(Left:0, Right:1)
+ */
+enum mods_5bit {
+    MOD_LCTL = 0x01,
+    MOD_LSFT = 0x02,
+    MOD_LALT = 0x04,
+    MOD_LGUI = 0x08,
+    MOD_RCTL = 0x11,
+    MOD_RSFT = 0x12,
+    MOD_RALT = 0x14,
+    MOD_RGUI = 0x18,
+};
+#define MOD_HYPR (MOD_LCTL | MOD_LSFT | MOD_LALT | MOD_LGUI)
+#define MOD_MEH (MOD_LCTL | MOD_LSFT | MOD_LALT)
+
+/** \brief 8-bit packed modifiers
+ */
+enum mods_8bit {
+    MOD_BIT_LCTRL  = 0b00000001,
+    MOD_BIT_LSHIFT = 0b00000010,
+    MOD_BIT_LALT   = 0b00000100,
+    MOD_BIT_LGUI   = 0b00001000,
+    MOD_BIT_RCTRL  = 0b00010000,
+    MOD_BIT_RSHIFT = 0b00100000,
+    MOD_BIT_RALT   = 0b01000000,
+    MOD_BIT_RGUI   = 0b10000000,
+};
+#define MOD_MASK_CTRL (MOD_BIT_LCTRL | MOD_BIT_RCTRL)
+#define MOD_MASK_SHIFT (MOD_BIT_LSHIFT | MOD_BIT_RSHIFT)
+#define MOD_MASK_ALT (MOD_BIT_LALT | MOD_BIT_RALT)
+#define MOD_MASK_GUI (MOD_BIT_LGUI | MOD_BIT_RGUI)
+#define MOD_MASK_CS (MOD_MASK_CTRL | MOD_MASK_SHIFT)
+#define MOD_MASK_CA (MOD_MASK_CTRL | MOD_MASK_ALT)
+#define MOD_MASK_CG (MOD_MASK_CTRL | MOD_MASK_GUI)
+#define MOD_MASK_SA (MOD_MASK_SHIFT | MOD_MASK_ALT)
+#define MOD_MASK_SG (MOD_MASK_SHIFT | MOD_MASK_GUI)
+#define MOD_MASK_AG (MOD_MASK_ALT | MOD_MASK_GUI)
+#define MOD_MASK_CSA (MOD_MASK_CTRL | MOD_MASK_SHIFT | MOD_MASK_ALT)
+#define MOD_MASK_CSG (MOD_MASK_CTRL | MOD_MASK_SHIFT | MOD_MASK_GUI)
+#define MOD_MASK_CAG (MOD_MASK_CTRL | MOD_MASK_ALT | MOD_MASK_GUI)
+#define MOD_MASK_SAG (MOD_MASK_SHIFT | MOD_MASK_ALT | MOD_MASK_GUI)
+#define MOD_MASK_CSAG (MOD_MASK_CTRL | MOD_MASK_SHIFT | MOD_MASK_ALT | MOD_MASK_GUI)