CHARKEY
if (hashp->hash(CHARKEY, sizeof(CHARKEY))
hashp->hdr.h_charkey = hashp->hash(CHARKEY, sizeof(CHARKEY));
if ((int32_t)hashp->hash(CHARKEY, sizeof(CHARKEY)) != hashp->H_CHARKEY)
hashp->H_CHARKEY = hashp->hash(CHARKEY, sizeof(CHARKEY));