+#if 0
+static int16_t fake_boxes[] = {
+ 1, 2, 3, 5, 8, 11, 13, 17, 19, 23, 29, 31, 37, 62, 97
+};
+#define ARRAYSIZE(a) (sizeof(a) / sizeof((a)[0]))
+#define NFAKE ARRAYSIZE(fake_boxes)
+
+static bool
+is_fake(int16_t box)
+{
+ unsigned i;
+ for (i = 0; i < NFAKE; i++)
+ if (fake_boxes[i] == box)
+ return true;
+ return false;
+}
+#else
+#define is_fake(b) false
+#endif
+