static int statement (LexState *ls) {
int line = ls->linenumber; /* may be needed for error messages */
switch (ls->t.token) {
case TK_IF: { /* stat -> ifstat */
ifstat(ls, line);
return 0;
}
case TK_WHILE: { /* stat -> whilestat */
whilestat(ls, line);
return 0;
}
case TK_DO: { /* stat -> DO block END */
luaX_next(ls); /* skip DO */
block(ls);
check_match(ls, TK_END, TK_DO, line);
return 0;
}
case TK_FOR: { /* stat -> forstat */
forstat(ls, line);
return 0;
}
case TK_REPEAT: { /* stat -> repeatstat */
repeatstat(ls, line);
return 0;
}
case TK_FUNCTION: {
funcstat(ls, line); /* stat -> funcstat */
return 0;
}
case TK_LOCAL: { /* stat -> localstat */
luaX_next(ls); /* skip LOCAL */
if (testnext(ls, TK_FUNCTION)) /* local function? */
localfunc(ls);
else
localstat(ls);
return 0;
}
case TK_RETURN: { /* stat -> retstat */
retstat(ls);
return 1; /* must be last statement */
}
case TK_BREAK: { /* stat -> breakstat */
luaX_next(ls); /* skip BREAK */
breakstat(ls);
return 1; /* must be last statement */
}
#if LUA_EXT_CONTINUE
case TK_CONTINUE: { /* stat -> continuestat */
luaX_next(ls); /* skip CONTINUE */
continuestat(ls);
return 1; /* must be last statement */
}
#endif /* LUA_EXT_CONTINUE */
default: {
exprstat(ls);
return 0; /* to avoid warnings */
}
}
}
void
_termstat()
{
needtermstat = 0;
init_termbuf();
localstat();
rcv_ioctl();
}
/*
* clientstat
*
* Process linemode related requests from the client.
* Client can request a change to only one of linemode, editmode or slc's
* at a time, and if using kludge linemode, then only linemode may be
* affected.
*/
void
clientstat(int code, int parm1, int parm2)
{
/*
* Get a copy of terminal characteristics.
*/
init_termbuf();
/*
* Process request from client. code tells what it is.
*/
switch (code) {
#ifdef LINEMODE
case TELOPT_LINEMODE:
/*
* Don't do anything unless client is asking us to change
* modes.
*/
uselinemode = (parm1 == WILL);
if (uselinemode != linemode) {
# ifdef KLUDGELINEMODE
/*
* If using kludge linemode, make sure that
* we can do what the client asks.
* We can not turn off linemode if alwayslinemode
* and the ICANON bit is set.
*/
if (lmodetype == KLUDGE_LINEMODE) {
if (alwayslinemode && tty_isediting()) {
uselinemode = 1;
}
}
/*
* Quit now if we can't do it.
*/
if (uselinemode == linemode)
return;
/*
* If using real linemode and linemode is being
* turned on, send along the edit mode mask.
*/
if (lmodetype == REAL_LINEMODE && uselinemode)
# else /* KLUDGELINEMODE */
if (uselinemode)
# endif /* KLUDGELINEMODE */
{
useeditmode = 0;
if (tty_isediting())
useeditmode |= MODE_EDIT;
if (tty_istrapsig())
useeditmode |= MODE_TRAPSIG;
if (tty_issofttab())
useeditmode |= MODE_SOFT_TAB;
if (tty_islitecho())
useeditmode |= MODE_LIT_ECHO;
output_data("%c%c%c%c%c%c%c", IAC,
SB, TELOPT_LINEMODE, LM_MODE,
useeditmode, IAC, SE);
editmode = useeditmode;
}
tty_setlinemode(uselinemode);
linemode = uselinemode;
if (!linemode)
send_will(TELOPT_ECHO, 1);
}
break;
case LM_MODE:
{
int ack, changed;
/*
* Client has sent along a mode mask. If it agrees with
* what we are currently doing, ignore it; if not, it could
* be viewed as a request to change. Note that the server
* will change to the modes in an ack if it is different from
* what we currently have, but we will not ack the ack.
*/
useeditmode &= MODE_MASK;
ack = (useeditmode & MODE_ACK);
useeditmode &= ~MODE_ACK;
if ((changed = (useeditmode ^ editmode))) {
/*
* This check is for a timing problem. If the
* state of the tty has changed (due to the user
* application) we need to process that info
* before we write in the state contained in the
* ack!!! This gets out the new MODE request,
* and when the ack to that command comes back
* we'll set it and be in the right mode.
*/
if (ack)
localstat();
if (changed & MODE_EDIT)
tty_setedit(useeditmode & MODE_EDIT);
if (changed & MODE_TRAPSIG)
tty_setsig(useeditmode & MODE_TRAPSIG);
if (changed & MODE_SOFT_TAB)
tty_setsofttab(useeditmode & MODE_SOFT_TAB);
if (changed & MODE_LIT_ECHO)
tty_setlitecho(useeditmode & MODE_LIT_ECHO);
set_termbuf();
if (!ack) {
output_data("%c%c%c%c%c%c%c", IAC,
SB, TELOPT_LINEMODE, LM_MODE,
useeditmode|MODE_ACK,
IAC, SE);
}
editmode = useeditmode;
}
break;
} /* end of case LM_MODE */
#endif /* LINEMODE */
case TELOPT_NAWS:
#ifdef TIOCSWINSZ
{
struct winsize ws;
def_col = parm1;
def_row = parm2;
#ifdef LINEMODE
/*
* Defer changing window size until after terminal is
* initialized.
*/
if (terminit() == 0)
return;
#endif /* LINEMODE */
/*
* Change window size as requested by client.
*/
ws.ws_col = parm1;
ws.ws_row = parm2;
(void) ioctl(spty, TIOCSWINSZ, (char *)&ws);
}
#endif /* TIOCSWINSZ */
break;
case TELOPT_TSPEED:
{
def_tspeed = parm1;
def_rspeed = parm2;
#ifdef LINEMODE
/*
* Defer changing the terminal speed.
*/
if (terminit() == 0)
return;
#endif /* LINEMODE */
/*
* Change terminal speed as requested by client.
* We set the receive speed first, so that if we can't
* store separate receive and transmit speeds, the transmit
* speed will take precedence.
*/
tty_rspeed(parm2);
tty_tspeed(parm1);
set_termbuf();
break;
} /* end of case TELOPT_TSPEED */
default:
/* What? */
break;
} /* end of switch */
netflush();
} /* end of clientstat */
static int statement (LexState *ls) {
int line = ls->linenumber; /* may be needed for error messages */
switch (ls->t.token) {
case TK_IF: { /* stat -> ifstat */
ifstat(ls, line);
return 0;
}
case TK_WHILE: { /* stat -> whilestat */
whilestat(ls, line);
return 0;
}
case TK_DO: { /* stat -> DO block END */
luaX_next(ls); /* skip DO */
block(ls);
check_match(ls, TK_END, TK_DO, line);
return 0;
}
case TK_FOR: { /* stat -> forstat */
forstat(ls, line);
return 0;
}
case TK_REPEAT: { /* stat -> repeatstat */
repeatstat(ls, line);
return 0;
}
case TK_FUNCTION: {
funcstat(ls, line); /* stat -> funcstat */
return 0;
}
case TK_LOCAL: { /* stat -> localstat */
luaX_next(ls); /* skip LOCAL */
if (testnext(ls, TK_FUNCTION)) /* local function? */
localfunc(ls);
else
localstat(ls);
return 0;
}
case TK_RETURN: { /* stat -> retstat */
retstat(ls);
return 1; /* must be last statement */
}
case TK_BREAK: { /* stat -> breakstat */
luaX_next(ls); /* skip BREAK */
if (testnext(ls, TK_NUMBER)) { /* multi scope 'break n' */
breakstat(ls, ls->t.seminfo.r);
} else breakstat(ls, 1);
return 1; /* must be last statement */
}
case TK_CONTINUE: { /* stat -> continuestat */
luaX_next(ls); /* skip CONTINUE */
continuestat(ls);
return 1; /* must be last statement */
}
case TK_INC: { /* added 0.5.2.*/
luaX_next(ls);
changevalue(ls, OP_ADD);
return 0;
}
case TK_DEC: { /* added 0.5.2.*/
luaX_next(ls);
changevalue(ls, OP_SUB);
return 0;
}
case TK_CASE: { /* added 0.5.2.*/
selectstat(ls, line);
return 0;
}
default: {
exprstat(ls);
return 0; /* to avoid warnings */
}
}
}
