SFH4_IN_TREE
nsfh->sfh_flags = SFH4_IN_TREE;
if (sfh->sfh_flags & SFH4_IN_TREE) {
sfh->sfh_flags &= ~SFH4_IN_TREE;
if (sfh->sfh_flags & SFH4_IN_TREE) {
sfh->sfh_flags &= ~SFH4_IN_TREE;
sfh->sfh_flags |= SFH4_IN_TREE;