C_OPEN_0
int off = (flags & C_OPEN_0) != 0 ? 6 : 5;
n = ovbit + ((flags & C_OPEN_0) != 0 ? 1 : 0);
if ((flags & C_OPEN_0) != 0 &&
open = cbp->c_flags & C_OPEN_0;
ncbp->c_flags = ocb.cv_win != 0 ? C_OPEN_0 : 0;