+/* Performs the .ifb (test_blank == 1) and
+ the .ifnb (test_blank == 0) pseudo op. */
+
+void
+s_ifb (int test_blank)
+{
+ struct conditional_frame cframe;
+
+ initialize_cframe (&cframe);
+
+ if (cframe.dead_tree)
+ cframe.ignoring = 1;
+ else
+ {
+ int is_eol;
+
+ SKIP_WHITESPACE ();
+ is_eol = is_end_of_line[(unsigned char) *input_line_pointer];
+ cframe.ignoring = (test_blank == !is_eol);
+ }
+
+ current_cframe =
+ (struct conditional_frame *) obstack_alloc (&cond_obstack, sizeof cframe);
+ memcpy (current_cframe, &cframe, sizeof cframe);
+
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
+ ignore_rest_of_line ();
+}
+