/**
* mutt_getch - Read a character from the input buffer
* @retval obj Event to process
*
* The priority for reading events is:
* 1. UngetKeyEvents buffer
* 2. MacroEvents buffer
* 3. Keyboard
*
* This function can return:
* - Error `{ -1, OP_NULL }`
* - Timeout `{ -2, OP_NULL }`
*/
struct Event mutt_getch(void)
{
int ch;
struct Event err = { -1, OP_NULL }, ret;
struct Event timeout = { -2, OP_NULL };
if (UngetCount)
return UngetKeyEvents[--UngetCount];
if (!OptIgnoreMacroEvents && MacroBufferCount)
return MacroEvents[--MacroBufferCount];
SigInt = 0;
mutt_sig_allow_interrupt(1);
#ifdef KEY_RESIZE
/* ncurses 4.2 sends this when the screen is resized */
ch = KEY_RESIZE;
while (ch == KEY_RESIZE)
#endif /* KEY_RESIZE */
#ifdef USE_INOTIFY
ch = mutt_monitor_getch();
#else
ch = getch();
#endif /* USE_INOTIFY */
mutt_sig_allow_interrupt(0);
if (SigInt)
{
mutt_query_exit();
return err;
}
/* either timeout, a sigwinch (if timeout is set), or the terminal
* has been lost */
if (ch == ERR)
{
if (!isatty(0))
mutt_exit(1);
return timeout;
}
if ((ch & 0x80) && C_MetaKey)
{
/* send ALT-x as ESC-x */
ch &= ~0x80;
mutt_unget_event(ch, 0);
ret.ch = '\033';
ret.op = 0;
return ret;
}
ret.ch = ch;
ret.op = 0;
return (ch == ctrl('G')) ? err : ret;
}
event_t mutt_getch (void)
{
int ch;
event_t err = {-1, OP_NULL }, ret;
if (UngetCount)
return (KeyEvent[--UngetCount]);
SigInt = 0;
#ifdef KEY_RESIZE
/* ncurses 4.2 sends this when the screen is resized */
ch = KEY_RESIZE;
while (ch == KEY_RESIZE)
#endif /* KEY_RESIZE */
ch = getch ();
if (SigInt)
mutt_query_exit ();
if(ch == ERR)
return err;
if ((ch & 0x80) && option (OPTMETAKEY))
{
/* send ALT-x as ESC-x */
ch &= ~0x80;
mutt_ungetch (ch, 0);
ret.ch = '\033';
ret.op = 0;
return ret;
}
ret.ch = ch;
ret.op = 0;
return (ch == ctrl ('G') ? err : ret);
}
/**
* raw_socket_poll - Checks whether reads would block - Implements Connection::conn_poll()
*/
int raw_socket_poll(struct Connection *conn, time_t wait_secs)
{
fd_set rfds;
unsigned long wait_millis;
struct timeval tv, pre_t, post_t;
if (conn->fd < 0)
return -1;
wait_millis = wait_secs * 1000UL;
while (true)
{
tv.tv_sec = wait_millis / 1000;
tv.tv_usec = (wait_millis % 1000) * 1000;
FD_ZERO(&rfds);
FD_SET(conn->fd, &rfds);
gettimeofday(&pre_t, NULL);
const int rc = select(conn->fd + 1, &rfds, NULL, NULL, &tv);
gettimeofday(&post_t, NULL);
if ((rc > 0) || ((rc < 0) && (errno != EINTR)))
return rc;
if (SigInt)
mutt_query_exit();
wait_millis += (pre_t.tv_sec * 1000UL) + (pre_t.tv_usec / 1000);
const unsigned long post_t_millis = (post_t.tv_sec * 1000UL) + (post_t.tv_usec / 1000);
if (wait_millis <= post_t_millis)
return 0;
wait_millis -= post_t_millis;
}
}