1 /* TUI Interpreter definitions for GDB, the GNU debugger.
3 Copyright 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "event-top.h"
26 #include "event-loop.h"
28 #include "tui/tuiData.h"
29 #include "readline/readline.h"
30 #include "tui/tuiWin.h"
32 #include "tui/tuiIO.h"
34 /* Set to 1 when the TUI mode must be activated when we first start gdb. */
35 static int tui_start_enabled = 0;
37 /* Cleanup the tui before exiting. */
42 /* Disable the tui. Curses mode is left leaving the screen
43 in a clean state (see endwin()). */
47 /* These implement the TUI interpreter. */
52 /* Install exit handler to leave the screen in a good shape. */
55 initializeStaticData ();
58 tui_initialize_readline ();
64 tui_resume (void *data)
66 gdb_setup_readline ();
67 if (tui_start_enabled)
73 tui_suspend (void *data)
75 tui_start_enabled = tui_active;
80 /* Display the prompt if we are silent. */
83 tui_display_prompt_p (void *data)
85 if (interp_quiet_p (NULL))
92 tui_exec (void *data, const char *command_str)
94 internal_error (__FILE__, __LINE__, "tui_exec called");
98 /* Initialize all the necessary variables, start the event loop,
99 register readline, and stdin, start the loop. */
102 tui_command_loop (void *data)
106 char *gdb_prompt = get_prompt ();
108 /* If we are using readline, set things up and display the first
109 prompt, otherwise just print the prompt. */
110 if (async_command_editing_p)
112 /* Tell readline what the prompt to display is and what function
113 it will need to call after a whole line is read. This also
114 displays the first prompt. */
115 length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
116 a_prompt = (char *) xmalloc (length);
117 strcpy (a_prompt, PREFIX (0));
118 strcat (a_prompt, gdb_prompt);
119 strcat (a_prompt, SUFFIX (0));
120 rl_callback_handler_install (a_prompt, input_handler);
123 display_gdb_prompt (0);
125 /* Loop until there is nothing to do. This is the entry point to the
126 event loop engine. gdb_do_one_event, called via catch_errors()
127 will process one event for each invocation. It blocks waits for
128 an event and then processes it. >0 when an event is processed, 0
129 when catch_errors() caught an error and <0 when there are no
130 longer any event sources registered. */
133 int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
137 /* Update gdb output according to TUI mode. Since catch_errors
138 preserves the uiout from changing, this must be done at top
139 level of event loop. */
143 uiout = tui_old_uiout;
147 /* FIXME: this should really be a call to a hook that is
148 interface specific, because interfaces can display the
149 prompt in their own way. */
150 display_gdb_prompt (0);
151 /* This call looks bizarre, but it is required. If the user
152 entered a command that caused an error,
153 after_char_processing_hook won't be called from
154 rl_callback_read_char_wrapper. Using a cleanup there
155 won't work, since we want this function to be called
156 after a new prompt is printed. */
157 if (after_char_processing_hook)
158 (*after_char_processing_hook) ();
159 /* Maybe better to set a flag to be checked somewhere as to
160 whether display the prompt or not. */
164 /* We are done with the event loop. There are no more event sources
165 to listen to. So we exit GDB. */
170 _initialize_tui_interp (void)
172 static const struct interp_procs procs = {
177 tui_display_prompt_p,
180 struct interp *tui_interp;
182 /* Create a default uiout builder for the TUI. */
183 tui_out = tui_out_new (gdb_stdout);
184 interp_add (interp_new ("tui", NULL, tui_out, &procs));
185 if (interpreter_p && strcmp (interpreter_p, "tui") == 0)
186 tui_start_enabled = 1;
188 if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
190 xfree (interpreter_p);
191 interpreter_p = xstrdup ("tui");