first_word
usernm, first_word(hostname, "."),
*first_word(char *, char *),
int first_word = fd->start / 32;
data = (words[first_word] >> shift) |
((uint64_t)words[first_word + 1] << (32 - shift));
data |= ((uint64_t)words[first_word + 2] << (64 - shift));