add src/ikarus subdir and make names unique for objects per scope

Signed-off-by: Folling <mail@folling.io>

src/ikarus/id.cpp

@@ -0,0 +1,14 @@
+#include "ikarus/id.h"
+
+#include <ikarus/objects/object_type.h>
+
+constexpr uint64_t IKARUS_ID_OBJECT_TYPE_BITS = 8;
+constexpr uint64_t IKARUS_ID_OBJECT_RANDOM_BITS = sizeof(IkarusId) - IKARUS_ID_OBJECT_TYPE_BITS;
+
+auto ikarus_id_from_data_and_type(int64_t data, IkarusObjectType type) -> IkarusId {
+    return data | (static_cast<IkarusId>(type) << IKARUS_ID_OBJECT_RANDOM_BITS);
+}
+
+auto ikarus_id_get_object_type(IkarusId id) -> IkarusObjectType {
+    return static_cast<IkarusObjectType>(id >> IKARUS_ID_OBJECT_RANDOM_BITS);
+}