ch_back_get
int ch_back_get __P((void));
(void) ch_back_get();
(void) ch_back_get(); /* Restore our position */
(void) ch_back_get();
while ((c = ch_back_get()) == '\n')
c = ch_back_get();
(void) ch_back_get();
c = ch_back_get();
while ((c = ch_back_get()) != '\n' && c != EOI)