/** bit_for_each64 - iterate over an u64 bits
 * @pos:        an int used as current bit
 * @tmp:        a temp u64 used as temporary storage
 * @ul:         the u64 to loop over
 *
 * Usage:
 * u64 u=139, _t;     //  u=b10001011
 * int cur;
 * bit_for_each64(cur, _t, u) {
 *     printf("%d\n", cur);
 * }
 * This will display the position of each bit in u: 1, 2, 4, 8
 *
 * I should probably re-think the implementation...
 */
#define bit_for_each64(pos, tmp, ul)                                    \
    for (tmp = ul, pos = ffs64(tmp); pos; tmp &= (tmp - 1),  pos = ffs64(tmp))

#endif  /* BITS_H */