+ * Initialization of the tarval module.
+ *
+ * Call before init_mode().
+ *
+ * @param null_value
+ * The reference mode NULL value, typical 0l
+ * @param support_quad_precision
+ * If non-zero, activate support for quad precision
+ */
+void init_tarval_1(long null_value, int support_quad_precision);
+
+/**
+ * Initialization of the tarval module.
+ *
+ * Call after init_mode().
+ */
+void init_tarval_2(void);
+
+/**
+ * Free all memory occupied by the tarval module.
+ */
+void finish_tarval(void);
+
+/**
+ * This struct represents the afore mentioned tarvals.