de_cn2off
ldep->de_FileSize = de_cn2off(pmp, size);
eof_clusteroff = de_cn2off(pmp, de_cluster(pmp, dep->de_FileSize));
if (de_cn2off(pmp, findcn) >= dep->de_FileSize) {
dep->de_FileSize - de_cn2off(pmp, findcn));
ddep->de_FileSize += de_cn2off(pmp, dirclust);
fileOffset = de_cn2off(fatVolume, buf->b_lblkno);
fileOffset = de_cn2off(fatVolume, blkno);