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"
29 #include "tui/tui-data.h"
30 #include "readline/readline.h"
31 #include "tui/tui-win.h"
33 #include "tui/tui-io.h"
34 #include "exceptions.h"
36 /* Set to 1 when the TUI mode must be activated when we first start gdb. */
37 static int tui_start_enabled = 0;
39 /* Cleanup the tui before exiting. */
44 /* Disable the tui. Curses mode is left leaving the screen
45 in a clean state (see endwin()). */
49 /* These implement the TUI interpreter. */
54 /* Install exit handler to leave the screen in a good shape. */
57 tui_initialize_static_data ();
60 tui_initialize_readline ();
66 tui_resume (void *data)
68 struct ui_file *stream;
70 /* gdb_setup_readline will change gdb_stdout. If the TUI was previously
71 writing to gdb_stdout, then set it to the new 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)
124 char *gdb_prompt = get_prompt ();
126 /* If we are using readline, set things up and display the first
127 prompt, otherwise just print the prompt. */
128 if (async_command_editing_p)
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)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
134 a_prompt = (char *) xmalloc (length);
135 strcpy (a_prompt, PREFIX (0));
136 strcat (a_prompt, gdb_prompt);
137 strcat (a_prompt, SUFFIX (0));
138 rl_callback_handler_install (a_prompt, input_handler);
141 display_gdb_prompt (0);
143 /* Loop until there is nothing to do. This is the entry point to the
144 event loop engine. gdb_do_one_event, called via catch_errors()
145 will process one event for each invocation. It blocks waits for
146 an event and then processes it. >0 when an event is processed, 0
147 when catch_errors() caught an error and <0 when there are no
148 longer any event sources registered. */
151 int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
155 /* Update gdb output according to TUI mode. Since catch_errors
156 preserves the uiout from changing, this must be done at top
157 level of event loop. */
161 uiout = tui_old_uiout;
165 /* FIXME: this should really be a call to a hook that is
166 interface specific, because interfaces can display the
167 prompt in their own way. */
168 display_gdb_prompt (0);
169 /* This call looks bizarre, but it is required. If the user
170 entered a command that caused an error,
171 after_char_processing_hook won't be called from
172 rl_callback_read_char_wrapper. Using a cleanup there
173 won't work, since we want this function to be called
174 after a new prompt is printed. */
175 if (after_char_processing_hook)
176 (*after_char_processing_hook) ();
177 /* Maybe better to set a flag to be checked somewhere as to
178 whether display the prompt or not. */
182 /* We are done with the event loop. There are no more event sources
183 to listen to. So we exit GDB. */
188 _initialize_tui_interp (void)
190 static const struct interp_procs procs = {
195 tui_display_prompt_p,
198 struct interp *tui_interp;
200 /* Create a default uiout builder for the TUI. */
201 tui_out = tui_out_new (gdb_stdout);
202 interp_add (interp_new (INTERP_TUI, NULL, tui_out, &procs));
203 if (interpreter_p && strcmp (interpreter_p, INTERP_TUI) == 0)
204 tui_start_enabled = 1;
206 if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
208 xfree (interpreter_p);
209 interpreter_p = xstrdup (INTERP_TUI);