1 /* CLI Definitions for GDB, the GNU debugger.
2
3 Copyright (C) 2002-2013 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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.
11
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.
16
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/>. */
19
20 #include "defs.h"
21 #include "interps.h"
22 #include "event-top.h"
23 #include "ui-out.h"
24 #include "cli-out.h"
25 #include "top.h" /* for "execute_command" */
26 #include "gdb_string.h"
27 #include "exceptions.h"
28
29 struct ui_out *cli_uiout;
30
31 /* These are the ui_out and the interpreter for the console
32 interpreter. */
33
34 /* Longjmp-safe wrapper for "execute_command". */
35 static struct gdb_exception safe_execute_command (struct ui_out *uiout,
36 char *command,
37 int from_tty);
38 /* These implement the cli out interpreter: */
39
40 static void *
cli_interpreter_init(struct interp * self,int top_level)41 cli_interpreter_init (struct interp *self, int top_level)
42 {
43 return NULL;
44 }
45
46 static int
cli_interpreter_resume(void * data)47 cli_interpreter_resume (void *data)
48 {
49 struct ui_file *stream;
50
51 /*sync_execution = 1; */
52
53 /* gdb_setup_readline will change gdb_stdout. If the CLI was
54 previously writing to gdb_stdout, then set it to the new
55 gdb_stdout afterwards. */
56
57 stream = cli_out_set_stream (cli_uiout, gdb_stdout);
58 if (stream != gdb_stdout)
59 {
60 cli_out_set_stream (cli_uiout, stream);
61 stream = NULL;
62 }
63
64 gdb_setup_readline ();
65
66 if (stream != NULL)
67 cli_out_set_stream (cli_uiout, gdb_stdout);
68
69 return 1;
70 }
71
72 static int
cli_interpreter_suspend(void * data)73 cli_interpreter_suspend (void *data)
74 {
75 gdb_disable_readline ();
76 return 1;
77 }
78
79 /* Don't display the prompt if we are set quiet. */
80 static int
cli_interpreter_display_prompt_p(void * data)81 cli_interpreter_display_prompt_p (void *data)
82 {
83 if (interp_quiet_p (NULL))
84 return 0;
85 else
86 return 1;
87 }
88
89 static struct gdb_exception
cli_interpreter_exec(void * data,const char * command_str)90 cli_interpreter_exec (void *data, const char *command_str)
91 {
92 struct ui_file *old_stream;
93 struct gdb_exception result;
94
95 /* FIXME: cagney/2003-02-01: Need to const char *propogate
96 safe_execute_command. */
97 char *str = strcpy (alloca (strlen (command_str) + 1), command_str);
98
99 /* gdb_stdout could change between the time cli_uiout was
100 initialized and now. Since we're probably using a different
101 interpreter which has a new ui_file for gdb_stdout, use that one
102 instead of the default.
103
104 It is important that it gets reset everytime, since the user
105 could set gdb to use a different interpreter. */
106 old_stream = cli_out_set_stream (cli_uiout, gdb_stdout);
107 result = safe_execute_command (cli_uiout, str, 1);
108 cli_out_set_stream (cli_uiout, old_stream);
109 return result;
110 }
111
112 static struct gdb_exception
safe_execute_command(struct ui_out * command_uiout,char * command,int from_tty)113 safe_execute_command (struct ui_out *command_uiout, char *command, int from_tty)
114 {
115 volatile struct gdb_exception e;
116 struct ui_out *saved_uiout;
117
118 /* Save and override the global ``struct ui_out'' builder. */
119 saved_uiout = current_uiout;
120 current_uiout = command_uiout;
121
122 TRY_CATCH (e, RETURN_MASK_ALL)
123 {
124 execute_command (command, from_tty);
125 }
126
127 /* Restore the global builder. */
128 current_uiout = saved_uiout;
129
130 /* FIXME: cagney/2005-01-13: This shouldn't be needed. Instead the
131 caller should print the exception. */
132 exception_print (gdb_stderr, e);
133 return e;
134 }
135
136 static struct ui_out *
cli_ui_out(struct interp * self)137 cli_ui_out (struct interp *self)
138 {
139 return cli_uiout;
140 }
141
142 /* Standard gdb initialization hook. */
143 extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */
144
145 void
_initialize_cli_interp(void)146 _initialize_cli_interp (void)
147 {
148 static const struct interp_procs procs = {
149 cli_interpreter_init, /* init_proc */
150 cli_interpreter_resume, /* resume_proc */
151 cli_interpreter_suspend, /* suspend_proc */
152 cli_interpreter_exec, /* exec_proc */
153 cli_interpreter_display_prompt_p, /* prompt_proc_p */
154 cli_ui_out /* ui_out_proc */
155 };
156 struct interp *cli_interp;
157
158 /* Create a default uiout builder for the CLI. */
159 cli_uiout = cli_out_new (gdb_stdout);
160 cli_interp = interp_new (INTERP_CONSOLE, &procs);
161
162 interp_add (cli_interp);
163 }
164