de_clcount
lastblock = de_clcount(pmp, length) - 1;
count = de_clcount(pmp, length) - de_clcount(pmp, dep->de_FileSize);
dirclust = de_clcount(pmp, needlen);
count = de_clcount(pmp, uio->uio_offset + resid) -
de_clcount(pmp, osize);
lastblock = de_clcount(pmp, length) - 1;
count = de_clcount(pmp, length) - de_clcount(pmp, dep->de_FileSize);