usr/src/usr.bin/telnet/defines.h

#define settimer(x)     clocks.x = clocks.system++

#if     !defined(TN3270)

#define ExitString(s,r) { fprintf(stderr, s); exit(r); }
#define Exit(x)                 exit(x)
#define SetIn3270()

#endif  /* !defined(TN3270) */

#define NETADD(c)       { *netoring.supply = c; ring_supplied(&netoring, 1); }
#define NET2ADD(c1,c2)  { NETADD(c1); NETADD(c2); }
#define NETBYTES()      (ring_full_count(&netoring))
#define NETROOM()       (ring_empty_count(&netoring))

#define TTYADD(c)       if (!(SYNCHing||flushout)) { \
                                *ttyoring.supply = c; \
                                ring_supplied(&ttyoring, 1); \
                        }
#define TTYBYTES()      (ring_full_count(&ttyoring))
#define TTYROOM()       (ring_empty_count(&ttyoring))

/*      Various modes */
#define MODE_LINE(m)    (modelist[m].modetype & LINE)
#define MODE_LOCAL_CHARS(m)     (modelist[m].modetype &  LOCAL_CHARS)
#define MODE_LOCAL_ECHO(m)      (modelist[m].modetype & LOCAL_ECHO)
#define MODE_COMMAND_LINE(m)    (modelist[m].modetype & COMMAND_LINE)

#define LOCAL_CHARS     0x01            /* Characters processed locally */
#define LINE            0x02            /* Line-by-line mode of operation */
#define LOCAL_ECHO      0x04            /* Echoing locally */
#define COMMAND_LINE    0x08            /* Command line mode */