1 files changed, 28 insertions, 0 deletions

diff --git a/quantum/keycode_config.c b/quantum/keycode_config.c
index 4f7bc525e..eb39c8fe0 100644
--- a/quantum/keycode_config.c
+++ b/quantum/keycode_config.c
@@ -88,3 +88,31 @@ uint16_t keycode_config(uint16_t keycode) {
             return keycode;
     }
 }
+
+uint8_t mod_config(uint8_t mod) {
+    keymap_config.raw = eeconfig_read_keymap();
+    if (keymap_config.swap_lalt_lgui) {
+        if ((mod & MOD_RGUI) == MOD_LGUI) {
+            mod &= ~MOD_LGUI;
+            mod |= MOD_LALT;
+        } else if ((mod & MOD_RALT) == MOD_LALT) {
+            mod &= ~MOD_LALT;
+            mod |= MOD_LGUI;
+        }
+    }
+    if (keymap_config.swap_ralt_rgui) {
+        if ((mod & MOD_RGUI) == MOD_RGUI) {
+            mod &= ~MOD_RGUI;
+            mod |= MOD_RALT;
+        } else if ((mod & MOD_RALT) == MOD_RALT) {
+            mod &= ~MOD_RALT;
+            mod |= MOD_RGUI;
+        }
+    }
+    if (keymap_config.no_gui) {
+        mod &= ~MOD_LGUI;
+        mod &= ~MOD_RGUI;
+    }
+
+    return mod;
+}
\ No newline at end of file