+static enum ih_category cur_category;
+
+static int h_compare_category_name(const void *vtype1, const void *vtype2)
+{
+ const int *type1 = vtype1;
+ const int *type2 = vtype2;
+ const char *name1 = genimg_get_cat_short_name(cur_category, *type1);
+ const char *name2 = genimg_get_cat_short_name(cur_category, *type2);
+
+ return strcmp(name1, name2);
+}
+
+int show_valid_options(enum ih_category category)
+{
+ int *order;
+ int count;
+ int item;
+ int i;
+
+ count = genimg_get_cat_count(category);
+ order = calloc(count, sizeof(*order));
+ if (!order)
+ return -ENOMEM;
+
+ /* Sort the names in order of short name for easier reading */
+ for (item = 0; item < count; item++)
+ order[item] = item;
+ cur_category = category;
+ qsort(order, count, sizeof(int), h_compare_category_name);
+
+ fprintf(stderr, "\nInvalid %s, supported are:\n",
+ genimg_get_cat_desc(category));
+ for (i = 0; i < count; i++) {
+ item = order[i];
+ fprintf(stderr, "\t%-15s %s\n",
+ genimg_get_cat_short_name(category, item),
+ genimg_get_cat_name(category, item));
+ }
+ fprintf(stderr, "\n");
+
+ return 0;
+}
+