Fixes for FFI.

src/ffi/static_data/libraries/library_settings.rs

@@ -0,0 +1,19 @@
+use crate::defines::LevelInt;
+use crate::ffi::{ExternPointer, OwnedPtr};
+use crate::static_data::LibrarySettings;
+use std::ptr::drop_in_place;
+
+#[no_mangle]
+extern "C" fn library_settings_new(max_level: LevelInt) -> OwnedPtr<LibrarySettings> {
+    Box::into_raw(Box::new(LibrarySettings::new(max_level)))
+}
+
+#[no_mangle]
+unsafe extern "C" fn library_settings_drop(ptr: OwnedPtr<LibrarySettings>) {
+    drop_in_place(ptr)
+}
+
+#[no_mangle]
+extern "C" fn library_settings_maximum_level(ptr: ExternPointer<LibrarySettings>) -> LevelInt {
+    ptr.as_ref().maximum_level()
+}