Adding support for a configuration file

android/app/src/main/cpp/questshock_native.c

@@ -10,6 +10,7 @@
 
 #include <SDL.h>
 
+#include "qs_config.h"
 #include "xr_overlay.h"
 #include "xr_session.h"
 
@@ -88,3 +89,17 @@ JNIEXPORT void JNICALL
 Java_de_ladkau_questshock_MenuOverlay_nativeShowKeyboard(JNIEnv *env, jclass clazz) {
     xr_overlay_set_visible(xr_session_get_keyboard_overlay(), true);
 }
+
+// MenuOverlay's "Save Configuration"/"Load Configuration" buttons - see
+// qs_config.h for why these only enqueue an event rather than doing the
+// actual file/engine-state work here directly (this runs on Android's UI
+// thread, not the engine's own).
+JNIEXPORT void JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeRequestSaveConfig(JNIEnv *env, jclass clazz) {
+    qs_config_request_save();
+}
+
+JNIEXPORT void JNICALL
+Java_de_ladkau_questshock_MenuOverlay_nativeRequestLoadConfig(JNIEnv *env, jclass clazz) {
+    qs_config_request_load();
+}