cli-interp.c revision 130803 
1/* CLI Definitions for GDB, the GNU debugger.
2
3   Copyright 2002, 2003 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 2 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, write to the Free Software
19   Foundation, Inc., 59 Temple Place - Suite 330,
20   Boston, MA 02111-1307, USA.  */
21
22#include "defs.h"
23#include "interps.h"
24#include "wrapper.h"
25#include "event-top.h"
26#include "ui-out.h"
27#include "cli-out.h"
28#include "top.h"		/* for "execute_command" */
29#include "gdb_string.h"
30
31struct ui_out *cli_uiout;
32
33/* These are the ui_out and the interpreter for the console interpreter. */
34
35/* Longjmp-safe wrapper for "execute_command" */
36static int do_captured_execute_command (struct ui_out *uiout, void *data);
37static enum gdb_rc safe_execute_command (struct ui_out *uiout, char *command,
38					 int from_tty);
39struct captured_execute_command_args
40{
41  char *command;
42  int from_tty;
43};
44
45/* These implement the cli out interpreter: */
46
47static void *
48cli_interpreter_init (void)
49{
50  return NULL;
51}
52
53static int
54cli_interpreter_resume (void *data)
55{
56  struct ui_file *stream;
57
58  /*sync_execution = 1; */
59
60  /* gdb_setup_readline will change gdb_stdout.  If the CLI was previously
61     writing to gdb_stdout, then set it to the new gdb_stdout afterwards.  */
62
63  stream = cli_out_set_stream (cli_uiout, gdb_stdout);
64  if (stream != gdb_stdout)
65    {
66      cli_out_set_stream (cli_uiout, stream);
67      stream = NULL;
68    }
69
70  gdb_setup_readline ();
71
72  if (stream != NULL)
73    cli_out_set_stream (cli_uiout, gdb_stdout);
74
75  return 1;
76}
77
78static int
79cli_interpreter_suspend (void *data)
80{
81  gdb_disable_readline ();
82  return 1;
83}
84
85/* Don't display the prompt if we are set quiet.  */
86static int
87cli_interpreter_display_prompt_p (void *data)
88{
89  if (interp_quiet_p (NULL))
90    return 0;
91  else
92    return 1;
93}
94
95static int
96cli_interpreter_exec (void *data, const char *command_str)
97{
98  int result;
99  struct ui_file *old_stream;
100
101  /* FIXME: cagney/2003-02-01: Need to const char *propogate
102     safe_execute_command.  */
103  char *str = strcpy (alloca (strlen (command_str) + 1), command_str);
104
105  /* gdb_stdout could change between the time cli_uiout was initialized
106     and now. Since we're probably using a different interpreter which has
107     a new ui_file for gdb_stdout, use that one instead of the default.
108
109     It is important that it gets reset everytime, since the user could
110     set gdb to use a different interpreter. */
111  old_stream = cli_out_set_stream (cli_uiout, gdb_stdout);
112  result = safe_execute_command (cli_uiout, str, 1);
113  cli_out_set_stream (cli_uiout, old_stream);
114  return result;
115}
116
117static int
118do_captured_execute_command (struct ui_out *uiout, void *data)
119{
120  struct captured_execute_command_args *args =
121    (struct captured_execute_command_args *) data;
122  execute_command (args->command, args->from_tty);
123  return GDB_RC_OK;
124}
125
126static enum gdb_rc
127safe_execute_command (struct ui_out *uiout, char *command, int from_tty)
128{
129  struct captured_execute_command_args args;
130  args.command = command;
131  args.from_tty = from_tty;
132  return catch_exceptions (uiout, do_captured_execute_command, &args,
133			   NULL, RETURN_MASK_ALL);
134}
135
136
137/* standard gdb initialization hook */
138extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */
139
140void
141_initialize_cli_interp (void)
142{
143  static const struct interp_procs procs = {
144    cli_interpreter_init,	/* init_proc */
145    cli_interpreter_resume,	/* resume_proc */
146    cli_interpreter_suspend,	/* suspend_proc */
147    cli_interpreter_exec,	/* exec_proc */
148    cli_interpreter_display_prompt_p	/* prompt_proc_p */
149  };
150  struct interp *cli_interp;
151
152  /* Create a default uiout builder for the CLI. */
153  cli_uiout = cli_out_new (gdb_stdout);
154  cli_interp = interp_new (INTERP_CONSOLE, NULL, cli_uiout, &procs);
155
156  interp_add (cli_interp);
157}
158