Implemented the ObjectStore functionality.

include/Hashmap.h

@@ -1,13 +1,23 @@
 #ifndef HASHMAP_H
 #define HASHMAP_H
 
+#include "engine_build_config.h"
 #include <stddef.h>
 #include <stdint.h>
 
+#ifdef DEBUG_ENGINE
+#include <stdio.h>
+#endif /* DEBUG_ENGINE */
+
 void init_hashmap();
 int32_t add_object_to_map(const char *key);
 int32_t get_object_index(const char *key);
-void delete_object_from_map(const char *key);
+int32_t delete_object_from_map(const char *key);
 void destroy_hashmap();
 
+#ifdef DEBUG_ENGINE
+void print_hashmap();
+void print_non_empty();
+#endif // DEBUG_ENGINE
+
 #endif // !HASHMAP_H