BZ2_BZALLOC_ALIGN
size_t sz = sizeof (bzap) + BZ2_BZALLOC_ALIGN + (items * size);
bzap *pp = (bzap *)((p + sizeof (bzap) + BZ2_BZALLOC_ALIGN - 1) &
-BZ2_BZALLOC_ALIGN);
t = P2ROUNDUP(t, BZ2_BZALLOC_ALIGN);
t = P2ROUNDUP(t, BZ2_BZALLOC_ALIGN);
t = P2ROUNDUP(t, BZ2_BZALLOC_ALIGN);
t = P2ROUNDUP(t, BZ2_BZALLOC_ALIGN);
*sz = P2ROUNDUP(*sz, BZ2_BZALLOC_ALIGN);