AB_LASTANP
AB_LASTANP(ab0p)->an_nextoff = aanp[0].an_nextoff;
anp = AB_LASTANP(rabp);
bcopy(ranp, AB_LASTANP(rabp), sizeof(alnode_t) * 2);
anp = AB_LASTANP(rabp);
bcopy(ranp, AB_LASTANP(rabp), sizeof(alnode_t) * 2);
AB_LASTANP(&rasp->as_ab)->an_nextoff;
AB_LASTANP(&rasp->as_ab)->an_nextoff = ~0;
anp = AB_LASTANP(abp);