1 /* TUI Interpreter definitions for GDB, the GNU debugger.
3 Copyright (C) 2003, 2007 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 3 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, see <http://www.gnu.org/licenses/>. */
23 #include "event-top.h"
24 #include "event-loop.h"
27 #include "tui/tui-data.h"
28 #include "readline/readline.h"
29 #include "tui/tui-win.h"
31 #include "tui/tui-io.h"
32 #include "exceptions.h"
34 /* Set to 1 when the TUI mode must be activated when we first start
36 static int tui_start_enabled = 0;
38 /* Cleanup the tui before exiting. */
43 /* Disable the tui. Curses mode is left leaving the screen in a
44 clean state (see endwin()). */
48 /* These implement the TUI interpreter. */
53 /* Install exit handler to leave the screen in a good shape. */
56 tui_initialize_static_data ();
59 tui_initialize_readline ();
65 tui_resume (void *data)
67 struct ui_file *stream;
69 /* gdb_setup_readline will change gdb_stdout. If the TUI was
70 previously writing to gdb_stdout, then set it to the new
71 gdb_stdout afterwards. */
73 stream = cli_out_set_stream (tui_old_uiout, gdb_stdout);
74 if (stream != gdb_stdout)
76 cli_out_set_stream (tui_old_uiout, stream);
80 gdb_setup_readline ();
83 cli_out_set_stream (tui_old_uiout, gdb_stdout);
85 if (tui_start_enabled)
91 tui_suspend (void *data)
93 tui_start_enabled = tui_active;
98 /* Display the prompt if we are silent. */
101 tui_display_prompt_p (void *data)
103 if (interp_quiet_p (NULL))
109 static struct gdb_exception
110 tui_exec (void *data, const char *command_str)
112 internal_error (__FILE__, __LINE__, _("tui_exec called"));
116 /* Initialize all the necessary variables, start the event loop,
117 register readline, and stdin, start the loop. */
120 tui_command_loop (void *data)
122 /* If we are using readline, set things up and display the first
123 prompt, otherwise just print the prompt. */
124 if (async_command_editing_p)
128 char *gdb_prompt = get_prompt ();
130 /* Tell readline what the prompt to display is and what function
131 it will need to call after a whole line is read. This also
132 displays the first prompt. */
133 length = strlen (PREFIX (0))
134 + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
135 a_prompt = (char *) alloca (length);
136 strcpy (a_prompt, PREFIX (0));
137 strcat (a_prompt, gdb_prompt);
138 strcat (a_prompt, SUFFIX (0));
139 rl_callback_handler_install (a_prompt, input_handler);
142 display_gdb_prompt (0);
144 /* Loop until there is nothing to do. This is the entry point to the
145 event loop engine. gdb_do_one_event, called via catch_errors()
146 will process one event for each invocation. It blocks waits for
147 an event and then processes it. >0 when an event is processed, 0
148 when catch_errors() caught an error and <0 when there are no
149 longer any event sources registered. */
152 int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
156 /* Update gdb output according to TUI mode. Since catch_errors
157 preserves the uiout from changing, this must be done at top
158 level of event loop. */
162 uiout = tui_old_uiout;
166 /* FIXME: this should really be a call to a hook that is
167 interface specific, because interfaces can display the
168 prompt in their own way. */
169 display_gdb_prompt (0);
170 /* This call looks bizarre, but it is required. If the user
171 entered a command that caused an error,
172 after_char_processing_hook won't be called from
173 rl_callback_read_char_wrapper. Using a cleanup there
174 won't work, since we want this function to be called
175 after a new prompt is printed. */
176 if (after_char_processing_hook)
177 (*after_char_processing_hook) ();
178 /* Maybe better to set a flag to be checked somewhere as to
179 whether display the prompt or not. */
183 /* We are done with the event loop. There are no more event sources
184 to listen to. So we exit GDB. */
189 _initialize_tui_interp (void)
191 static const struct interp_procs procs = {
196 tui_display_prompt_p,
199 struct interp *tui_interp;
201 /* Create a default uiout builder for the TUI. */
202 tui_out = tui_out_new (gdb_stdout);
203 interp_add (interp_new (INTERP_TUI, NULL, tui_out, &procs));
204 if (interpreter_p && strcmp (interpreter_p, INTERP_TUI) == 0)
205 tui_start_enabled = 1;
207 if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
209 xfree (interpreter_p);
210 interpreter_p = xstrdup (INTERP_TUI);