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_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; }