SEGSUM_FINFOBASE
fp = SEGSUM_FINFOBASE(fs, sp);
fp = SEGSUM_FINFOBASE(fs, sp);
sp->fip = SEGSUM_FINFOBASE(fs, ssp);
fp = SEGSUM_FINFOBASE(fs, sp);
fip = SEGSUM_FINFOBASE(fs, (SEGSUM *)buf);
sp->fip = SEGSUM_FINFOBASE(fs, sp->segsum);
fip = SEGSUM_FINFOBASE(fs, ssp);
fp = SEGSUM_FINFOBASE(lfsp, sp);
fp = SEGSUM_FINFOBASE(lfsp, sp);