e3da6fc58a
(tui_initialize_readline): Allow to use space to leave SingleKey to enter one gdb command. (tui_enable): Restore the TUI keymap when we are back to TUI. (tui_disable): Restore normal keymap when leaving TUI. * tuiIO.c (tui_redisplay_readline): Restore the SingleKey mode when the buffer becomes empty and we are in tui_one_command_mode.
695 lines
19 KiB
C
695 lines
19 KiB
C
/* TUI support I/O functions.
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Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation,
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Inc.
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Contributed by Hewlett-Packard Company.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* FIXME: cagney/2002-02-28: The GDB coding standard indicates that
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"defs.h" should be included first. Unfortunatly some systems
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(currently Debian GNU/Linux) include the <stdbool.h> via <curses.h>
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and they clash with "bfd.h"'s definiton of true/false. The correct
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fix is to remove true/false from "bfd.h", however, until that
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happens, hack around it by including "config.h" and <curses.h>
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first. */
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#include "config.h"
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#ifdef HAVE_NCURSES_H
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#include <ncurses.h>
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#else
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#ifdef HAVE_CURSES_H
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#include <curses.h>
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#endif
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#endif
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#include <stdio.h>
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#include "defs.h"
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#include "terminal.h"
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#include "target.h"
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#include "event-loop.h"
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#include "event-top.h"
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#include "command.h"
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#include "top.h"
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#include "readline/readline.h"
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#include "tui.h"
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#include "tuiData.h"
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#include "tuiIO.h"
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#include "tuiCommand.h"
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#include "tuiWin.h"
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#include "tuiGeneralWin.h"
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#include "tui-file.h"
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#include "ui-out.h"
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#include "cli-out.h"
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#include <fcntl.h>
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#include <signal.h>
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/* Use definition from readline 4.3. */
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#undef CTRL_CHAR
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#define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0))
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/* This file controls the IO interactions between gdb and curses.
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When the TUI is enabled, gdb has two modes a curses and a standard
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mode.
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In curses mode, the gdb outputs are made in a curses command window.
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For this, the gdb_stdout and gdb_stderr are redirected to the specific
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ui_file implemented by TUI. The output is handled by tui_puts().
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The input is also controlled by curses with tui_getc(). The readline
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library uses this function to get its input. Several readline hooks
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are installed to redirect readline output to the TUI (see also the
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note below).
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In normal mode, the gdb outputs are restored to their origin, that
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is as if TUI is not used. Readline also uses its original getc()
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function with stdin.
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Note SCz/2001-07-21: the current readline is not clean in its management of
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the output. Even if we install a redisplay handler, it sometimes writes on
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a stdout file. It is important to redirect every output produced by
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readline, otherwise the curses window will be garbled. This is implemented
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with a pipe that TUI reads and readline writes to. A gdb input handler
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is created so that reading the pipe is handled automatically.
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This will probably not work on non-Unix platforms. The best fix is
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to make readline clean enougth so that is never write on stdout.
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Note SCz/2002-09-01: we now use more readline hooks and it seems that
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with them we don't need the pipe anymore (verified by creating the pipe
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and closing its end so that write causes a SIGPIPE). The old pipe code
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is still there and can be conditionally removed by
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#undef TUI_USE_PIPE_FOR_READLINE. */
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/* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */
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#define TUI_USE_PIPE_FOR_READLINE
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/*#undef TUI_USE_PIPE_FOR_READLINE*/
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/* TUI output files. */
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static struct ui_file *tui_stdout;
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static struct ui_file *tui_stderr;
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struct ui_out *tui_out;
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/* GDB output files in non-curses mode. */
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static struct ui_file *tui_old_stdout;
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static struct ui_file *tui_old_stderr;
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struct ui_out *tui_old_uiout;
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/* Readline previous hooks. */
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static Function *tui_old_rl_getc_function;
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static VFunction *tui_old_rl_redisplay_function;
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static VFunction *tui_old_rl_prep_terminal;
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static VFunction *tui_old_rl_deprep_terminal;
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static int tui_old_readline_echoing_p;
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/* Readline output stream.
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Should be removed when readline is clean. */
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static FILE *tui_rl_outstream;
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static FILE *tui_old_rl_outstream;
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#ifdef TUI_USE_PIPE_FOR_READLINE
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static int tui_readline_pipe[2];
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#endif
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static unsigned int _tuiHandleResizeDuringIO (unsigned int);
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static void
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tui_putc (char c)
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{
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char buf[2];
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buf[0] = c;
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buf[1] = 0;
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tui_puts (buf);
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}
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/* Print the string in the curses command window. */
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void
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tui_puts (const char *string)
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{
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static int tui_skip_line = -1;
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char c;
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WINDOW *w;
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w = cmdWin->generic.handle;
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while ((c = *string++) != 0)
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{
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/* Catch annotation and discard them. We need two \032 and
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discard until a \n is seen. */
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if (c == '\032')
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{
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tui_skip_line++;
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}
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else if (tui_skip_line != 1)
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{
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tui_skip_line = -1;
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waddch (w, c);
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}
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else if (c == '\n')
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tui_skip_line = -1;
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}
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getyx (w, cmdWin->detail.commandInfo.curLine,
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cmdWin->detail.commandInfo.curch);
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cmdWin->detail.commandInfo.start_line = cmdWin->detail.commandInfo.curLine;
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/* We could defer the following. */
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wrefresh (w);
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fflush (stdout);
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}
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/* Readline callback.
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Redisplay the command line with its prompt after readline has
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changed the edited text. */
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void
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tui_redisplay_readline (void)
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{
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int prev_col;
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int height;
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int col, line;
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int c_pos;
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int c_line;
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int in;
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WINDOW *w;
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char *prompt;
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int start_line;
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/* Detect when we temporarily left SingleKey and now the readline
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edit buffer is empty, automatically restore the SingleKey mode. */
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if (tui_current_key_mode == tui_one_command_mode && rl_end == 0)
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tui_set_key_mode (tui_single_key_mode);
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if (tui_current_key_mode == tui_single_key_mode)
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prompt = "";
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else
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prompt = get_prompt ();
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c_pos = -1;
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c_line = -1;
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w = cmdWin->generic.handle;
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start_line = cmdWin->detail.commandInfo.start_line;
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wmove (w, start_line, 0);
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prev_col = 0;
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height = 1;
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for (in = 0; prompt && prompt[in]; in++)
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{
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waddch (w, prompt[in]);
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getyx (w, line, col);
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if (col < prev_col)
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height++;
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prev_col = col;
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}
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for (in = 0; in < rl_end; in++)
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{
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unsigned char c;
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c = (unsigned char) rl_line_buffer[in];
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if (in == rl_point)
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{
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getyx (w, c_line, c_pos);
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}
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if (CTRL_CHAR (c) || c == RUBOUT)
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{
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waddch (w, '^');
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waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?');
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}
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else
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{
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waddch (w, c);
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}
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if (c == '\n')
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{
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getyx (w, cmdWin->detail.commandInfo.start_line,
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cmdWin->detail.commandInfo.curch);
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}
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getyx (w, line, col);
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if (col < prev_col)
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height++;
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prev_col = col;
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}
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wclrtobot (w);
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getyx (w, cmdWin->detail.commandInfo.start_line,
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cmdWin->detail.commandInfo.curch);
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if (c_line >= 0)
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{
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wmove (w, c_line, c_pos);
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cmdWin->detail.commandInfo.curLine = c_line;
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cmdWin->detail.commandInfo.curch = c_pos;
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}
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cmdWin->detail.commandInfo.start_line -= height - 1;
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wrefresh (w);
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fflush(stdout);
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}
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/* Readline callback to prepare the terminal. It is called once
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each time we enter readline. There is nothing to do in curses mode. */
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static void
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tui_prep_terminal (void)
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{
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}
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/* Readline callback to restore the terminal. It is called once
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each time we leave readline. There is nothing to do in curses mode. */
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static void
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tui_deprep_terminal (void)
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{
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}
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#ifdef TUI_USE_PIPE_FOR_READLINE
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/* Read readline output pipe and feed the command window with it.
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Should be removed when readline is clean. */
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static void
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tui_readline_output (int code, gdb_client_data data)
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{
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int size;
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char buf[256];
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size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1);
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if (size > 0 && tui_active)
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{
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buf[size] = 0;
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tui_puts (buf);
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}
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}
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#endif
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/* Return the portion of PATHNAME that should be output when listing
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possible completions. If we are hacking filename completion, we
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are only interested in the basename, the portion following the
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final slash. Otherwise, we return what we were passed.
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Comes from readline/complete.c */
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static char *
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printable_part (pathname)
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char *pathname;
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{
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char *temp;
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temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL;
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#if defined (__MSDOS__)
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if (rl_filename_completion_desired && temp == 0 && isalpha (pathname[0]) && pathname[1] == ':')
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temp = pathname + 1;
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#endif
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return (temp ? ++temp : pathname);
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}
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/* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we
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are using it, check for and output a single character for `special'
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filenames. Return the number of characters we output. */
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#define PUTX(c) \
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do { \
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if (CTRL_CHAR (c)) \
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{ \
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tui_puts ("^"); \
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tui_putc (UNCTRL (c)); \
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printed_len += 2; \
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} \
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else if (c == RUBOUT) \
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{ \
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tui_puts ("^?"); \
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printed_len += 2; \
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} \
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else \
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{ \
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tui_putc (c); \
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printed_len++; \
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} \
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} while (0)
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static int
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print_filename (to_print, full_pathname)
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char *to_print, *full_pathname;
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{
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int printed_len = 0;
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char *s;
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for (s = to_print; *s; s++)
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{
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PUTX (*s);
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}
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return printed_len;
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}
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/* The user must press "y" or "n". Non-zero return means "y" pressed.
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Comes from readline/complete.c */
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static int
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get_y_or_n ()
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{
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extern int _rl_abort_internal ();
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int c;
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for (;;)
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{
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c = rl_read_key ();
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if (c == 'y' || c == 'Y' || c == ' ')
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return (1);
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if (c == 'n' || c == 'N' || c == RUBOUT)
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return (0);
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if (c == ABORT_CHAR)
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_rl_abort_internal ();
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beep ();
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}
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}
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/* A convenience function for displaying a list of strings in
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columnar format on readline's output stream. MATCHES is the list
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of strings, in argv format, LEN is the number of strings in MATCHES,
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and MAX is the length of the longest string in MATCHES.
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Comes from readline/complete.c and modified to write in
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the TUI command window using tui_putc/tui_puts. */
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static void
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tui_rl_display_match_list (matches, len, max)
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char **matches;
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int len, max;
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{
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typedef int QSFUNC (const void *, const void *);
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extern int _rl_qsort_string_compare (const void*, const void*);
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extern int _rl_print_completions_horizontally;
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int count, limit, printed_len;
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int i, j, k, l;
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char *temp;
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/* Screen dimension correspond to the TUI command window. */
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int screenwidth = cmdWin->generic.width;
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/* If there are many items, then ask the user if she really wants to
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see them all. */
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if (len >= rl_completion_query_items)
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{
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char msg[256];
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sprintf (msg, "\nDisplay all %d possibilities? (y or n)", len);
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tui_puts (msg);
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if (get_y_or_n () == 0)
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{
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tui_puts ("\n");
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return;
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}
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}
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/* How many items of MAX length can we fit in the screen window? */
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max += 2;
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limit = screenwidth / max;
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if (limit != 1 && (limit * max == screenwidth))
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limit--;
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/* Avoid a possible floating exception. If max > screenwidth,
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limit will be 0 and a divide-by-zero fault will result. */
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if (limit == 0)
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limit = 1;
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/* How many iterations of the printing loop? */
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count = (len + (limit - 1)) / limit;
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/* Watch out for special case. If LEN is less than LIMIT, then
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just do the inner printing loop.
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0 < len <= limit implies count = 1. */
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/* Sort the items if they are not already sorted. */
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if (rl_ignore_completion_duplicates == 0)
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qsort (matches + 1, len, sizeof (char *),
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(QSFUNC *)_rl_qsort_string_compare);
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tui_putc ('\n');
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if (_rl_print_completions_horizontally == 0)
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{
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/* Print the sorted items, up-and-down alphabetically, like ls. */
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for (i = 1; i <= count; i++)
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{
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for (j = 0, l = i; j < limit; j++)
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{
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if (l > len || matches[l] == 0)
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break;
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else
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{
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temp = printable_part (matches[l]);
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printed_len = print_filename (temp, matches[l]);
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if (j + 1 < limit)
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for (k = 0; k < max - printed_len; k++)
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tui_putc (' ');
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}
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l += count;
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}
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tui_putc ('\n');
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}
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}
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else
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{
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/* Print the sorted items, across alphabetically, like ls -x. */
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for (i = 1; matches[i]; i++)
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{
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temp = printable_part (matches[i]);
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printed_len = print_filename (temp, matches[i]);
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/* Have we reached the end of this line? */
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if (matches[i+1])
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{
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if (i && (limit > 1) && (i % limit) == 0)
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tui_putc ('\n');
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else
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for (k = 0; k < max - printed_len; k++)
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tui_putc (' ');
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}
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}
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tui_putc ('\n');
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}
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}
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/* Setup the IO for curses or non-curses mode.
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- In non-curses mode, readline and gdb use the standard input and
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|
standard output/error directly.
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|
- In curses mode, the standard output/error is controlled by TUI
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|
with the tui_stdout and tui_stderr. The output is redirected in
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the curses command window. Several readline callbacks are installed
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|
so that readline asks for its input to the curses command window
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with wgetch(). */
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void
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tui_setup_io (int mode)
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{
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extern int readline_echoing_p;
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if (mode)
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{
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/* Redirect readline to TUI. */
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tui_old_rl_redisplay_function = rl_redisplay_function;
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tui_old_rl_deprep_terminal = rl_deprep_term_function;
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tui_old_rl_prep_terminal = rl_prep_term_function;
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tui_old_rl_getc_function = rl_getc_function;
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tui_old_rl_outstream = rl_outstream;
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tui_old_readline_echoing_p = readline_echoing_p;
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rl_redisplay_function = tui_redisplay_readline;
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rl_deprep_term_function = tui_deprep_terminal;
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rl_prep_term_function = tui_prep_terminal;
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rl_getc_function = tui_getc;
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readline_echoing_p = 0;
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rl_outstream = tui_rl_outstream;
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rl_prompt = 0;
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rl_completion_display_matches_hook = tui_rl_display_match_list;
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rl_already_prompted = 0;
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/* Keep track of previous gdb output. */
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tui_old_stdout = gdb_stdout;
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tui_old_stderr = gdb_stderr;
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tui_old_uiout = uiout;
|
|
|
|
/* Reconfigure gdb output. */
|
|
gdb_stdout = tui_stdout;
|
|
gdb_stderr = tui_stderr;
|
|
gdb_stdlog = gdb_stdout; /* for moment */
|
|
gdb_stdtarg = gdb_stderr; /* for moment */
|
|
uiout = tui_out;
|
|
|
|
/* Save tty for SIGCONT. */
|
|
savetty ();
|
|
}
|
|
else
|
|
{
|
|
/* Restore gdb output. */
|
|
gdb_stdout = tui_old_stdout;
|
|
gdb_stderr = tui_old_stderr;
|
|
gdb_stdlog = gdb_stdout; /* for moment */
|
|
gdb_stdtarg = gdb_stderr; /* for moment */
|
|
uiout = tui_old_uiout;
|
|
|
|
/* Restore readline. */
|
|
rl_redisplay_function = tui_old_rl_redisplay_function;
|
|
rl_deprep_term_function = tui_old_rl_deprep_terminal;
|
|
rl_prep_term_function = tui_old_rl_prep_terminal;
|
|
rl_getc_function = tui_old_rl_getc_function;
|
|
rl_outstream = tui_old_rl_outstream;
|
|
rl_completion_display_matches_hook = 0;
|
|
readline_echoing_p = tui_old_readline_echoing_p;
|
|
rl_already_prompted = 0;
|
|
|
|
/* Save tty for SIGCONT. */
|
|
savetty ();
|
|
}
|
|
}
|
|
|
|
#ifdef SIGCONT
|
|
/* Catch SIGCONT to restore the terminal and refresh the screen. */
|
|
static void
|
|
tui_cont_sig (int sig)
|
|
{
|
|
if (tui_active)
|
|
{
|
|
/* Restore the terminal setting because another process (shell)
|
|
might have changed it. */
|
|
resetty ();
|
|
|
|
/* Force a refresh of the screen. */
|
|
tuiRefreshAll ();
|
|
|
|
/* Update cursor position on the screen. */
|
|
wmove (cmdWin->generic.handle,
|
|
cmdWin->detail.commandInfo.start_line,
|
|
cmdWin->detail.commandInfo.curch);
|
|
wrefresh (cmdWin->generic.handle);
|
|
}
|
|
signal (sig, tui_cont_sig);
|
|
}
|
|
#endif
|
|
|
|
/* Initialize the IO for gdb in curses mode. */
|
|
void
|
|
tui_initialize_io ()
|
|
{
|
|
#ifdef SIGCONT
|
|
signal (SIGCONT, tui_cont_sig);
|
|
#endif
|
|
|
|
/* Create tui output streams. */
|
|
tui_stdout = tui_fileopen (stdout);
|
|
tui_stderr = tui_fileopen (stderr);
|
|
tui_out = tui_out_new (tui_stdout);
|
|
|
|
/* Create the default UI. It is not created because we installed
|
|
a init_ui_hook. */
|
|
tui_old_uiout = uiout = cli_out_new (gdb_stdout);
|
|
|
|
#ifdef TUI_USE_PIPE_FOR_READLINE
|
|
/* Temporary solution for readline writing to stdout:
|
|
redirect readline output in a pipe, read that pipe and
|
|
output the content in the curses command window. */
|
|
if (pipe (tui_readline_pipe) != 0)
|
|
{
|
|
fprintf_unfiltered (gdb_stderr, "Cannot create pipe for readline");
|
|
exit (1);
|
|
}
|
|
tui_rl_outstream = fdopen (tui_readline_pipe[1], "w");
|
|
if (tui_rl_outstream == 0)
|
|
{
|
|
fprintf_unfiltered (gdb_stderr, "Cannot redirect readline output");
|
|
exit (1);
|
|
}
|
|
setlinebuf (tui_rl_outstream);
|
|
|
|
#ifdef O_NONBLOCK
|
|
(void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK);
|
|
#else
|
|
#ifdef O_NDELAY
|
|
(void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY);
|
|
#endif
|
|
#endif
|
|
add_file_handler (tui_readline_pipe[0], tui_readline_output, 0);
|
|
#else
|
|
tui_rl_outstream = stdout;
|
|
#endif
|
|
}
|
|
|
|
/* Get a character from the command window. This is called from the readline
|
|
package. */
|
|
int
|
|
tui_getc (FILE *fp)
|
|
{
|
|
int ch;
|
|
WINDOW *w;
|
|
|
|
w = cmdWin->generic.handle;
|
|
|
|
#ifdef TUI_USE_PIPE_FOR_READLINE
|
|
/* Flush readline output. */
|
|
tui_readline_output (GDB_READABLE, 0);
|
|
#endif
|
|
|
|
ch = wgetch (w);
|
|
ch = _tuiHandleResizeDuringIO (ch);
|
|
|
|
/* The \n must be echoed because it will not be printed by readline. */
|
|
if (ch == '\n')
|
|
{
|
|
/* When hitting return with an empty input, gdb executes the last
|
|
command. If we emit a newline, this fills up the command window
|
|
with empty lines with gdb prompt at beginning. Instead of that,
|
|
stay on the same line but provide a visual effect to show the
|
|
user we recognized the command. */
|
|
if (rl_end == 0)
|
|
{
|
|
wmove (w, cmdWin->detail.commandInfo.curLine, 0);
|
|
|
|
/* Clear the line. This will blink the gdb prompt since
|
|
it will be redrawn at the same line. */
|
|
wclrtoeol (w);
|
|
wrefresh (w);
|
|
napms (20);
|
|
}
|
|
else
|
|
{
|
|
wmove (w, cmdWin->detail.commandInfo.curLine,
|
|
cmdWin->detail.commandInfo.curch);
|
|
waddch (w, ch);
|
|
}
|
|
}
|
|
|
|
if (m_isCommandChar (ch))
|
|
{ /* Handle prev/next/up/down here */
|
|
ch = tuiDispatchCtrlChar (ch);
|
|
}
|
|
|
|
if (ch == '\n' || ch == '\r' || ch == '\f')
|
|
cmdWin->detail.commandInfo.curch = 0;
|
|
#if 0
|
|
else
|
|
tuiIncrCommandCharCountBy (1);
|
|
#endif
|
|
if (ch == KEY_BACKSPACE)
|
|
return '\b';
|
|
|
|
return ch;
|
|
}
|
|
|
|
|
|
/* Cleanup when a resize has occured.
|
|
Returns the character that must be processed. */
|
|
static unsigned int
|
|
_tuiHandleResizeDuringIO (unsigned int originalCh)
|
|
{
|
|
if (tuiWinResized ())
|
|
{
|
|
tuiRefreshAll ();
|
|
dont_repeat ();
|
|
tuiSetWinResizedTo (FALSE);
|
|
return '\n';
|
|
}
|
|
else
|
|
return originalCh;
|
|
}
|