+COS_Symbol
+cos_read_symbol (unsigned char *str, size_t len, size_t start, size_t* endp);
+
+COS_Cons
+cos_read_list (unsigned char *str, size_t len, size_t start, size_t* endp);
+
+COS_object
+cos_read_object (unsigned char *str, size_t len, size_t start, size_t* endp);
+