ldterm_unget
if ((c = ldterm_unget(tp)) != -1) {
while ((c = ldterm_unget(tp)) == ' ' || c == '\t') {
c = ldterm_unget(tp);
while ((c = ldterm_unget(tp)) == ' ' || c == '\t') {
c = ldterm_unget(tp);
while ((c = ldterm_unget(tp)) != (-1)) {
while ((c = ldterm_unget(tp)) != -1) {
while (ldterm_unget(tp) != -1) {
static int ldterm_unget(ldtermstd_state_t *);
if ((c = ldterm_unget(tp)) != (-1)) {