static inline int
fifo_push(void)
{
int n;
unsigned int ch;
if (tail == -1)
return ERR;
#ifdef HIDE_EINTR
again:
errno = 0;
#endif
#if USE_GPM_SUPPORT || defined(USE_EMX_MOUSE)
if ((SP->_mouse_fd >= 0)
&& (_nc_timed_wait(3, -1, (int *) 0) & 2)) {
SP->_mouse_event(SP);
ch = KEY_MOUSE;
n = 1;
} else
#endif
{
unsigned char c2 = 0;
n = read(SP->_ifd, &c2, 1);
ch = c2 & 0xff;
}
#ifdef HIDE_EINTR
/*
* Under System V curses with non-restarting signals, getch() returns
* with value ERR when a handled signal keeps it from completing.
* If signals restart system calls, OTOH, the signal is invisible
* except to its handler.
*
* We don't want this difference to show. This piece of code
* tries to make it look like we always have restarting signals.
*/
if (n <= 0 && errno == EINTR)
goto again;
#endif
if ((n == -1) || (n == 0)) {
TR(TRACE_IEVENT, ("read(%d,&ch,1)=%d, errno=%d", SP->_ifd, n, errno));
ch = ERR;
}
TR(TRACE_IEVENT, ("read %d characters", n));
SP->_fifo[tail] = ch;
SP->_fifohold = 0;
if (head == -1)
head = peek = tail;
t_inc();
TR(TRACE_IEVENT, ("pushed %#x at %d", ch, tail));
#ifdef TRACE
if (_nc_tracing & TRACE_IEVENT)
_nc_fifo_dump();
#endif
return ch;
}
safe_ungetch(SCREEN *sp, int ch)
{
int rc = ERR;
T((T_CALLED("ungetch(%p,%s)"), (void *) sp, _nc_tracechar(sp, ch)));
if (tail != -1) {
if (head == -1) {
head = 0;
t_inc();
peek = tail; /* no raw keys */
} else
h_dec();
sp->_fifo[head] = ch;
T(("ungetch %s ok", _nc_tracechar(sp, ch)));
#ifdef TRACE
if (USE_TRACEF(TRACE_IEVENT)) {
_nc_fifo_dump(sp);
_nc_unlock_global(tracef);
}
#endif
rc = OK;
}
returnCode(rc);
}
int ungetch(int ch)
{
if (tail == -1)
return ERR;
if (head == -1) {
head = 0;
t_inc()
peek = tail; /* no raw keys */
} else
h_dec();
SP->_fifo[head] = ch;
T(("ungetch %#x ok", ch));
#ifdef TRACE
if (_nc_tracing & TRACE_IEVENT) _nc_fifo_dump();
#endif
return OK;
}
static inline int
fifo_pull(void)
{
int ch;
ch = SP->_fifo[head];
TR(TRACE_IEVENT, ("pulling %d from %d", ch, head));
if (peek == head) {
h_inc();
peek = head;
} else
h_inc();
#ifdef TRACE
if (_nc_tracing & TRACE_IEVENT)
_nc_fifo_dump();
#endif
return ch;
}
static NCURSES_INLINE int
fifo_pull(SCREEN *sp)
{
int ch;
ch = sp->_fifo[head];
TR(TRACE_IEVENT, ("pulling %s from %d", _nc_tracechar(sp, ch), head));
if (peek == head) {
h_inc();
peek = head;
} else
h_inc();
#ifdef TRACE
if (USE_TRACEF(TRACE_IEVENT)) {
_nc_fifo_dump(sp);
_nc_unlock_global(tracef);
}
#endif
return ch;
}
static inline int
fifo_push(EVENTLIST_0th(_nc_eventlist * evl))
{
int n;
int ch = 0;
int mask = 0;
(void) mask;
if (tail == -1)
return ERR;
#ifdef HIDE_EINTR
again:
errno = 0;
#endif
#ifdef NCURSES_WGETCH_EVENTS
if (evl
#if USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
|| (SP->_mouse_fd >= 0)
#endif
) {
mask = check_mouse_activity(-1 EVENTLIST_2nd(evl));
} else
mask = 0;
if (mask & 4) {
T(("fifo_push: ungetch KEY_EVENT"));
ungetch(KEY_EVENT);
return KEY_EVENT;
}
#elif USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
if (SP->_mouse_fd >= 0) {
mask = check_mouse_activity(-1 EVENTLIST_2nd(evl));
}
#endif
#if USE_GPM_SUPPORT || USE_EMX_MOUSE
if ((SP->_mouse_fd >= 0) && (mask & 2)) {
SP->_mouse_event(SP);
ch = KEY_MOUSE;
n = 1;
} else
#endif
#if USE_SYSMOUSE
if ((SP->_mouse_type == M_SYSMOUSE)
&& (SP->_sysmouse_head < SP->_sysmouse_tail)) {
SP->_mouse_event(SP);
ch = KEY_MOUSE;
n = 1;
} else if ((SP->_mouse_type == M_SYSMOUSE)
&& (mask <= 0) && errno == EINTR) {
SP->_mouse_event(SP);
ch = KEY_MOUSE;
n = 1;
} else
#endif
{ /* Can block... */
unsigned char c2 = 0;
n = read(SP->_ifd, &c2, 1);
ch = c2;
}
#ifdef HIDE_EINTR
/*
* Under System V curses with non-restarting signals, getch() returns
* with value ERR when a handled signal keeps it from completing.
* If signals restart system calls, OTOH, the signal is invisible
* except to its handler.
*
* We don't want this difference to show. This piece of code
* tries to make it look like we always have restarting signals.
*/
if (n <= 0 && errno == EINTR)
goto again;
#endif
if ((n == -1) || (n == 0)) {
TR(TRACE_IEVENT, ("read(%d,&ch,1)=%d, errno=%d", SP->_ifd, n, errno));
ch = ERR;
}
TR(TRACE_IEVENT, ("read %d characters", n));
SP->_fifo[tail] = ch;
SP->_fifohold = 0;
if (head == -1)
head = peek = tail;
t_inc();
TR(TRACE_IEVENT, ("pushed %s at %d", _tracechar(ch), tail));
#ifdef TRACE
if (_nc_tracing & TRACE_IEVENT)
_nc_fifo_dump();
#endif
return ch;
}
