URE_FLAG_LINK
sc->ure_flags &= ~URE_FLAG_LINK;
if (!(sc->ure_flags & URE_FLAG_LINK) ||
sc->ure_flags &= ~URE_FLAG_LINK;
if ((sc->ure_flags & URE_FLAG_LINK) == 0)
sc->ure_flags &= ~URE_FLAG_LINK;
sc->ure_flags |= URE_FLAG_LINK;
sc->ure_flags |= URE_FLAG_LINK;
if ((sc->ure_flags & URE_FLAG_LINK) == 0)
sc->ure_flags |= URE_FLAG_LINK;
sc->ure_flags &= ~URE_FLAG_LINK;