ober_get_ostring
int ober_get_ostring(struct ber_element *,
(void) ober_get_ostring(a, &(ret->str[i]));
if (ober_get_ostring(elm, &ostring) == -1) {
(void) ober_get_ostring(a, &(ret->str[i]));
(void) ober_get_ostring(a, &(ret->str[i]));