* when adding 128 - it is neither a predecessor nor a successor,
* after adding more than 127 to the starting value - it is a successor */
#define seq_before(x, y) ({typeof(x) _dummy = (x - y); \
- _dummy > smallest_signed_int(_dummy); })
+ _dummy > smallest_signed_int(_dummy); })
#define seq_after(x, y) seq_before(y, x)
struct hashtable_t *vis_hash;