+#endif
+
+ /** Allocate an IDL.
+ * Allocates memory for an IDL of a default size.
+ * @return IDL on success, NULL on failure.
+ */
+IDL mdb_midl_alloc();
+
+ /** Free an IDL.
+ * @param[in] ids The IDL to free.
+ */
+void mdb_midl_free(IDL ids);
+
+ /** Shrink an IDL.
+ * Return the IDL to the default size if it has grown larger.
+ * @param[in,out] idp Address of the IDL to shrink.
+ * @return 0 on no change, non-zero if shrunk.
+ */
+int mdb_midl_shrink(IDL *idp);
+
+ /** Append an ID onto an IDL.
+ * @param[in,out] idp Address of the IDL to append to.
+ * @param[in] id The ID to append.
+ * @return 0 on success, -1 if the IDL is too large.
+ */
+int mdb_midl_append( IDL *idp, ID id );
+
+ /** Append an IDL onto an IDL.
+ * @param[in,out] idp Address of the IDL to append to.
+ * @param[in] app The IDL to append.
+ * @return 0 on success, -1 if the IDL is too large.
+ */
+int mdb_midl_append_list( IDL *idp, IDL app );
+
+ /** Sort an IDL.
+ * @param[in,out] ids The IDL to sort.
+ */
+void mdb_midl_sort( IDL ids );