md_get_int64le
md_get_int64le(mbp, &lint);
md_get_int64le(mbp, &lint);
md_get_int64le(mbp, &lint);
md_get_int64le(mbp, &lint); /* file size */
md_get_int64le(mdp, &units);
md_get_int64le(mdp, &funits);
int md_get_int64le(struct mdchain *mdp, int64_t *x);