C++ rl_callback_handler_install函数代码示例

int edit_init(void (*cmd_cb)(void *ctx, char *cmd),
	      void (*eof_cb)(void *ctx),
	      char ** (*completion_cb)(void *ctx, const char *cmd, int pos),
	      void *ctx, const char *history_file, const char *ps)
{
	edit_cb_ctx = ctx;
	edit_cmd_cb = cmd_cb;
	edit_eof_cb = eof_cb;
	edit_completion_cb = completion_cb;

	rl_attempted_completion_function = readline_completion;
	if (history_file) {
		read_history(history_file);
		stifle_history(100);
	}

	eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);

	if (ps) {
		size_t blen = os_strlen(ps) + 3;
		char *ps2 = os_malloc(blen);
		if (ps2) {
			os_snprintf(ps2, blen, "%s> ", ps);
			rl_callback_handler_install(ps2, readline_cmd_handler);
			os_free(ps2);
			return 0;
		}
	}

	rl_callback_handler_install("> ", readline_cmd_handler);

	return 0;
}

void *
ConsoleUI::threadMain(void *arg) {
	rl_callback_handler_install("", ConsoleUICallbacks::lineRead);
	while (!quit) {
		while (canRead()) {
			lineProcessed = false;
			rl_callback_read_char();
			if (lineProcessed && rl_prompt != NULL && rl_prompt[0] != '\0') {
				// If a line has been processed, reset the prompt
				// so we don't see it again after an Enter.
				rl_set_prompt("");
				rl_display_prompt = NULL;
				rl_redisplay();
			}
		}

		pthread_mutex_lock(&outputLock);
		if (!output.empty()) {
			processOutput();
			pthread_cond_broadcast(&outputCond);
		}
		pthread_mutex_unlock(&outputLock);

		usleep(10000);
	}
	rl_callback_handler_remove();
	return NULL;
}

int
console_init(int infd, int outfd, cons_info_t *ci, int cnt,
    cons_exit_handler exitcb, const char *prompt)
{
	if (cmds != NULL) {
		return (-1);
	}
	cmds = ci;
	cmd_cnt = cnt;
	exit_handler = exitcb;
	cons_prompt = prompt;

	infile = infd == 0 ? stdin : fdopen(infd, "r");
	outfile = outfd == 1 ? stdout : fdopen(outfd, "w");

#ifdef	USE_READLINE
	rl_instream = infile;
	rl_outstream = outfile;
	rl_completion_entry_function = possible_cmds;
#ifdef	THREADS
	if (pthread_create(&cons_tid, NULL, console_thr, NULL) != 0) {
		return (-1);
	}
#else
	rl_callback_handler_install(prompt, handle_rlinput);
#endif	/* THREADS */
#else
	fprintf(outfile, "%s", prompt);
	fflush(outfile);
#endif	/* USE_READLINE */

	return (0);
}

char *ssc_input_read_string(char *str, int size)
{
#if USE_READLINE
  char *input;

  /* disable readline callbacks */
  if (ssc_input_handler_f)
    rl_callback_handler_remove();

  rl_reset_line_state();

  /* read a string a feed to 'str' */
  input = readline(ssc_input_prompt);
  strncpy(str, input, size - 1);
  str[size - 1] = 0;

  /* free the copy malloc()'ed by readline */
  free(input);

  /* reinstall the func */
  if (ssc_input_handler_f)
    rl_callback_handler_install(ssc_input_prompt, ssc_input_handler_f);
  
  rl_redisplay();

  return str;
#else
  return fgets(str, size, stdin);
#endif
}

/* Initialize all the necessary variables, start the event loop,
   register readline, and stdin, start the loop. */
void
cli_command_loop (void *data /* unused */)
{
  int length;
  char *a_prompt;
  char *gdb_prompt = get_prompt ();

  /* If we are using readline, set things up and display the first
     prompt, otherwise just print the prompt. */
  if (async_command_editing_p)
    {
      /* Tell readline what the prompt to display is and what function it
         will need to call after a whole line is read. This also displays
         the first prompt. */
      length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
      a_prompt = (char *) xmalloc (length);
      strcpy (a_prompt, PREFIX (0));
      strcat (a_prompt, gdb_prompt);
      strcat (a_prompt, SUFFIX (0));
      rl_callback_handler_install (a_prompt, input_handler);
    }
  else
    display_gdb_prompt (0);

  /* Now it's time to start the event loop. */
  start_event_loop ();
}

int main(int argc, char *argv[]) {
    if (argc != 2) {
        char usage[] = "%s block_directory\n\t"
                        "Starts the bitcoin client with block chain storage "
                        "in the specified directory\n";
        printf(usage, argv[0]);
        exit(2);
    }

    srand(time(NULL));

    /* initialize block chain and selector */
    char *dir = make_dir(argv[1]);
    block_chain = BRNewBlockChain(dir);
    selector = BRNewSelector();

    /* allow readline to work with select */
    rl_callback_handler_install("$ ", handle_line);
    BRAddSelectable(selector, STDIN_FILENO, readline_callback, NULL, 0, FOR_READING);

    BRLoop(selector);

    free(dir);
    return 0;
}

int cli_init(struct parser_state *_state)
{
	const char *home;

	rl_readline_name = "nft";
	rl_instream  = stdin;
	rl_outstream = stdout;

	rl_callback_handler_install("nft> ", cli_complete);
	rl_attempted_completion_function = cli_completion;

	home = getenv("HOME");
	if (home == NULL)
		home = "";
	snprintf(histfile, sizeof(histfile), "%s/%s", home, CMDLINE_HISTFILE);

	read_history(histfile);
	history_set_pos(history_length);

	state	= _state;
	scanner = scanner_init(state);

	while (!eof)
		rl_callback_read_char();
	return 0;
}

void tty_init( const char *name, const char *prompt )
{

	if( isatty(STDOUT_FILENO)){
		char *term;
		char *area = tent;

		if( NULL == (term = getenv("TERM") )){
			term="dumb";
		}

		if( 0 <= tgetent( tent, term ) ){
			tcap.clreol = tgetstr("ce", &area );
			tcap.abold = tgetstr("md", &area );
			tcap.anorm = tgetstr("me", &area );
		}
	}

	dmsg_msg_cb = tty_vmsg;
	dfmt_bf = tcap.abold;
	dfmt_nf = tcap.anorm;

	rl_readline_name = name;
	rl_attempted_completion_function = tty_completer;

	rl_callback_handler_install( prompt, tty_executor );
}

void
readline_status_mode (cli_context_t *ctx, const keymap_entry_t map[])
{
	int i;
	Keymap stkmap;

	readline_cli_ctx = ctx;
	rl_callback_handler_install (NULL, &readline_status_callback);

	/* Backup current keymap-name */
	readline_keymap = g_strdup (rl_get_keymap_name (rl_get_keymap ()));

	/* New keymap for status mode */
	stkmap = rl_make_bare_keymap ();

	/* Fill out the keymap and display it. */
	g_printf ("\n");
	for (i = 0; map[i].keyseq; i++) {
		rl_set_key (map[i].keyseq,
		            rl_named_function (map[i].named_function),
		            stkmap);
		if (map[i].readable_keyseq) {
			g_printf ("   (%s) %s\n", map[i].readable_keyseq,
			          map[i].readable_function ? map[i].readable_function
			                                   : map[i].named_function);
		}
	}
	g_printf ("\n");

	rl_set_keymap (stkmap);
}

void
readline_resume (cli_context_t *ctx)
{
	configuration_t *config = cli_context_config (ctx);
	rl_callback_handler_install (configuration_get_string (config, "PROMPT"),
	                             &readline_callback);
}

int
main (int c, char **v)
{
  fd_set fds;
  int r;

  /* Install the line handler. */
  rl_callback_handler_install (prompt, cb_linehandler);

  /* Enter a simple event loop.  This waits until something is available
     to read on readline's input stream (defaults to standard input) and
     calls the builtin character read callback to read it.  It does not
     have to modify the user's terminal settings. */
  running = 1;
  while (running)
    {
      FD_ZERO (&fds);
      FD_SET (fileno (rl_instream), &fds);    

      r = select (FD_SETSIZE, &fds, NULL, NULL, NULL);
      if (r < 0 && errno != EINTR)
	{
	  perror ("rltest: select");
	  rl_callback_handler_remove ();
	  break;
	}

      if (FD_ISSET (fileno (rl_instream), &fds))
	rl_callback_read_char ();
    }

  printf ("rltest: Event loop has exited\n");
  return 0;
}

static void install_line_handler() {
    if (rl_bind_key(RETURN, io_handle_enter)) {
        io_printfln("failed to bind RETURN");
        abort();
    }
    rl_callback_handler_install(prompt, handle_line_fake);
}

int
cli_rl_enable (struct cli_state *state)
{
        int ret = 0;

        rl_pre_input_hook = NULL;
        rl_attempted_completion_function = cli_rl_autocomplete;
        rl_completion_entry_function = complete_none;

        if (!state->rl_async) {
                ret = pthread_create (&state->input, NULL,
                                      cli_rl_input, state);
                if (ret == 0)
                        state->rl_enabled = 1;
                goto out;
        }

        ret = event_register (state->ctx->event_pool, 0, cli_rl_stdin, state,
                              1, 0);
        if (ret == -1)
                goto out;

        state->rl_enabled = 1;
        rl_callback_handler_install (state->prompt, cli_rl_process_line);

out:
        return state->rl_enabled;
}

char* displayCmdLine(WINDOW *win){
	curs_set(2);
	winCommandMode = win;
	wmove (win, 1, 1);
	//wprintw(winCommandMode, prompt);
	wrefresh(win);

	//rl_bind_key(RETURN, io_handle_enter);
	rl_redisplay_function = (rl_voidfunc_t*)rl_redisplay_mod;

	wprintw(winCommandMode, prompt);
	char* line = readline(prompt);
	add_history(line);
	// for testing history
	//line = readline(prompt);
	wmove (win, 1, 11);
	wprintw(winCommandMode, line);
	wrefresh(win);
	return line;


	rl_callback_handler_install(prompt, handle_line);

	while (prog_running) {
		usleep(10);
		rl_callback_read_char();
	}
	rl_callback_handler_remove();
	//handle_command(rl_line_buffer);
	return rl_line_buffer;
} 

static char *
readline_until_enter_or_signal(const char *prompt, int *signal)
{
    char * not_done_reading = "";
    fd_set selectset;

    *signal = 0;
#ifdef HAVE_RL_CATCH_SIGNAL
    rl_catch_signals = 0;
#endif

    rl_callback_handler_install (prompt, rlhandler);
    FD_ZERO(&selectset);

    completed_input_string = not_done_reading;

    while (completed_input_string == not_done_reading) {
        int has_input = 0, err = 0;

        while (!has_input)
        {               struct timeval timeout = {0, 100000}; /* 0.1 seconds */

            /* [Bug #1552726] Only limit the pause if an input hook has been
               defined.  */
            struct timeval *timeoutp = NULL;
            if (PyOS_InputHook)
                timeoutp = &timeout;
            FD_SET(fileno(rl_instream), &selectset);
            /* select resets selectset if no input was available */
            has_input = select(fileno(rl_instream) + 1, &selectset,
                               NULL, NULL, timeoutp);
            err = errno;
            if(PyOS_InputHook) PyOS_InputHook();
        }

        if (has_input > 0) {
            rl_callback_read_char();
        }
        else if (err == EINTR) {
            int s;
#ifdef WITH_THREAD
            PyEval_RestoreThread(_PyOS_ReadlineTState);
#endif
            s = PyErr_CheckSignals();
#ifdef WITH_THREAD
            PyEval_SaveThread();
#endif
            if (s < 0) {
                rl_free_line_state();
                rl_cleanup_after_signal();
                rl_callback_handler_remove();
                *signal = 1;
                completed_input_string = NULL;
            }
        }
    }

    return completed_input_string;
}