int
ttyflush(int drop)
{
int n, n0, n1;
n0 = ring_full_count(&ttyoring);
if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
if (drop) {
TerminalFlushOutput();
/* we leave 'n' alone! */
} else {
n = TerminalWrite(ttyoring.consume, n);
}
}
if (n > 0) {
if (termdata && n) {
Dump('>', ttyoring.consume, n);
}
/*
* If we wrote everything, and the full count is
* larger than what we wrote, then write the
* rest of the buffer.
*/
if (n1 == n && n0 > n) {
n1 = n0 - n;
if (!drop)
n1 = TerminalWrite(ttyoring.bottom, n1);
if (n1 > 0)
n += n1;
}
ring_consumed(&ttyoring, n);
}
if (n < 0) {
if (errno == EAGAIN || errno == EINTR) {
return -1;
} else {
ring_consumed(&ttyoring, ring_full_count(&ttyoring));
setconnmode(0);
setcommandmode();
NetClose(net);
fprintf(stderr, "Write error on local output.\n");
exit(1);
}
return -1;
}
if (n == n0) {
if (n0)
return -1;
return 0;
}
return n0 - n + 1;
}
int
Scheduler(int block) /* should we block in the select ? */
{
/* One wants to be a bit careful about setting returnValue
* to one, since a one implies we did some useful work,
* and therefore probably won't be called to block next
* time (TN3270 mode only).
*/
int returnValue;
int netin, netout, netex, ttyin, ttyout;
/* Decide which rings should be processed */
netout = ring_full_count(&netoring) &&
(flushline ||
(my_want_state_is_wont(TELOPT_LINEMODE)
#ifdef KLUDGELINEMODE
&& (!kludgelinemode || my_want_state_is_do(TELOPT_SGA))
#endif
) ||
my_want_state_is_will(TELOPT_BINARY));
ttyout = ring_full_count(&ttyoring);
ttyin = ring_empty_count(&ttyiring);
netin = !ISend && ring_empty_count(&netiring);
netex = !SYNCHing;
/* If we have seen a signal recently, reset things */
if (scheduler_lockout_tty) {
ttyin = ttyout = 0;
}
/* Call to system code to process rings */
returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block);
/* Now, look at the input rings, looking for work to do. */
if (ring_full_count(&ttyiring)) {
returnValue |= telsnd();
}
if (ring_full_count(&netiring)) {
returnValue |= telrcv();
}
return returnValue;
}
void
SetForExit (void)
{
setconnmode (0);
#if defined TN3270
if (In3270)
{
Finish3270 ();
}
#else /* defined(TN3270) */
do
{
telrcv (); /* Process any incoming data */
EmptyTerminal ();
}
while (ring_full_count (&netiring)); /* While there is any */
#endif /* defined(TN3270) */
setcommandmode ();
fflush (stdout);
fflush (stderr);
#if defined TN3270
if (In3270)
{
StopScreen (1);
}
#endif /* defined(TN3270) */
setconnmode (0);
EmptyTerminal (); /* Flush the path to the tty */
setcommandmode ();
}
int
Push3270(void)
{
int save = ring_full_count(&netiring);
if (save) {
if (Ifrontp+save > Ibuf+sizeof Ibuf) {
if (Ibackp != Ibuf) {
memmove(Ibuf, Ibackp, Ifrontp-Ibackp);
Ifrontp -= (Ibackp-Ibuf);
Ibackp = Ibuf;
}
}
if (Ifrontp+save < Ibuf+sizeof Ibuf) {
(void)telrcv();
}
}
return save != ring_full_count(&netiring);
}
int
ttyflush (int drop)
{
register int n, n0, n1;
n0 = ring_full_count (&ttyoring);
if ((n1 = n = ring_full_consecutive (&ttyoring)) > 0)
{
if (drop)
{
TerminalFlushOutput ();
/* we leave 'n' alone! */
}
else
{
n = TerminalWrite ((char *) ttyoring.consume, n);
}
}
if (n > 0)
{
if (termdata && n)
{
Dump ('>', ttyoring.consume, n);
}
/*
* If we wrote everything, and the full count is
* larger than what we wrote, then write the
* rest of the buffer.
*/
if (n1 == n && n0 > n)
{
n1 = n0 - n;
if (!drop)
n1 = TerminalWrite ((char *) ttyoring.bottom, n1);
if (n1 > 0)
n += n1;
}
ring_consumed (&ttyoring, n);
}
if (n < 0)
return -1;
if (n == n0)
{
if (n0)
return -1;
return 0;
}
return n0 - n + 1;
}
static void
SetForExit(void)
{
setconnmode(0);
do {
(void)telrcv(); /* Process any incoming data */
EmptyTerminal();
} while (ring_full_count(&netiring)); /* While there is any */
setcommandmode();
fflush(stdout);
fflush(stderr);
setconnmode(0);
EmptyTerminal(); /* Flush the path to the tty */
setcommandmode();
}