OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [tui/] [tui-interp.c] - Blame information for rev 840

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn
/* TUI Interpreter definitions for GDB, the GNU debugger.
2
 
3
   Copyright (C) 2003, 2007, 2008 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 "top.h"
23
#include "event-top.h"
24
#include "event-loop.h"
25
#include "ui-out.h"
26
#include "cli-out.h"
27
#include "tui/tui-data.h"
28
#include "readline/readline.h"
29
#include "tui/tui-win.h"
30
#include "tui/tui.h"
31
#include "tui/tui-io.h"
32
#include "exceptions.h"
33
 
34
/* Set to 1 when the TUI mode must be activated when we first start
35
   gdb.  */
36
static int tui_start_enabled = 0;
37
 
38
/* Cleanup the tui before exiting.  */
39
 
40
static void
41
tui_exit (void)
42
{
43
  /* Disable the tui.  Curses mode is left leaving the screen in a
44
     clean state (see endwin()).  */
45
  tui_disable ();
46
}
47
 
48
/* These implement the TUI interpreter.  */
49
 
50
static void *
51
tui_init (void)
52
{
53
  /* Install exit handler to leave the screen in a good shape.  */
54
  atexit (tui_exit);
55
 
56
  tui_initialize_static_data ();
57
 
58
  tui_initialize_io ();
59
  tui_initialize_win ();
60
  tui_initialize_readline ();
61
 
62
  return NULL;
63
}
64
 
65
static int
66
tui_resume (void *data)
67
{
68
  struct ui_file *stream;
69
 
70
  /* gdb_setup_readline will change gdb_stdout.  If the TUI was
71
     previously writing to gdb_stdout, then set it to the new
72
     gdb_stdout afterwards.  */
73
 
74
  stream = cli_out_set_stream (tui_old_uiout, gdb_stdout);
75
  if (stream != gdb_stdout)
76
    {
77
      cli_out_set_stream (tui_old_uiout, stream);
78
      stream = NULL;
79
    }
80
 
81
  gdb_setup_readline ();
82
 
83
  if (stream != NULL)
84
    cli_out_set_stream (tui_old_uiout, gdb_stdout);
85
 
86
  if (tui_start_enabled)
87
    tui_enable ();
88
  return 1;
89
}
90
 
91
static int
92
tui_suspend (void *data)
93
{
94
  tui_start_enabled = tui_active;
95
  tui_disable ();
96
  return 1;
97
}
98
 
99
/* Display the prompt if we are silent.  */
100
 
101
static int
102
tui_display_prompt_p (void *data)
103
{
104
  if (interp_quiet_p (NULL))
105
    return 0;
106
  else
107
    return 1;
108
}
109
 
110
static struct gdb_exception
111
tui_exec (void *data, const char *command_str)
112
{
113
  internal_error (__FILE__, __LINE__, _("tui_exec called"));
114
}
115
 
116
 
117
/* Initialize all the necessary variables, start the event loop,
118
   register readline, and stdin, start the loop.  */
119
 
120
static void
121
tui_command_loop (void *data)
122
{
123
  /* If we are using readline, set things up and display the first
124
     prompt, otherwise just print the prompt.  */
125
  if (async_command_editing_p)
126
    {
127
      int length;
128
      char *a_prompt;
129
      char *gdb_prompt = get_prompt ();
130
 
131
      /* Tell readline what the prompt to display is and what function
132
         it will need to call after a whole line is read. This also
133
         displays the first prompt.  */
134
      length = strlen (PREFIX (0))
135
        + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
136
      a_prompt = (char *) alloca (length);
137
      strcpy (a_prompt, PREFIX (0));
138
      strcat (a_prompt, gdb_prompt);
139
      strcat (a_prompt, SUFFIX (0));
140
      rl_callback_handler_install (a_prompt, input_handler);
141
    }
142
  else
143
    display_gdb_prompt (0);
144
 
145
  /* Loop until there is nothing to do. This is the entry point to the
146
     event loop engine. gdb_do_one_event, called via catch_errors()
147
     will process one event for each invocation.  It blocks waits for
148
     an event and then processes it.  >0 when an event is processed, 0
149
     when catch_errors() caught an error and <0 when there are no
150
     longer any event sources registered.  */
151
  while (1)
152
    {
153
      int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
154
      if (result < 0)
155
        break;
156
 
157
      /* Update gdb output according to TUI mode.  Since catch_errors
158
         preserves the uiout from changing, this must be done at top
159
         level of event loop.  */
160
      if (tui_active)
161
        uiout = tui_out;
162
      else
163
        uiout = tui_old_uiout;
164
 
165
      if (result == 0)
166
        {
167
          /* FIXME: this should really be a call to a hook that is
168
             interface specific, because interfaces can display the
169
             prompt in their own way.  */
170
          display_gdb_prompt (0);
171
          /* This call looks bizarre, but it is required.  If the user
172
             entered a command that caused an error,
173
             after_char_processing_hook won't be called from
174
             rl_callback_read_char_wrapper.  Using a cleanup there
175
             won't work, since we want this function to be called
176
             after a new prompt is printed.  */
177
          if (after_char_processing_hook)
178
            (*after_char_processing_hook) ();
179
          /* Maybe better to set a flag to be checked somewhere as to
180
             whether display the prompt or not.  */
181
        }
182
    }
183
 
184
  /* We are done with the event loop. There are no more event sources
185
     to listen to.  So we exit GDB.  */
186
  return;
187
}
188
 
189
void
190
_initialize_tui_interp (void)
191
{
192
  static const struct interp_procs procs = {
193
    tui_init,
194
    tui_resume,
195
    tui_suspend,
196
    tui_exec,
197
    tui_display_prompt_p,
198
    tui_command_loop,
199
  };
200
  struct interp *tui_interp;
201
 
202
  /* Create a default uiout builder for the TUI.  */
203
  tui_out = tui_out_new (gdb_stdout);
204
  interp_add (interp_new (INTERP_TUI, NULL, tui_out, &procs));
205
  if (interpreter_p && strcmp (interpreter_p, INTERP_TUI) == 0)
206
    tui_start_enabled = 1;
207
 
208
  if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
209
    {
210
      xfree (interpreter_p);
211
      interpreter_p = xstrdup (INTERP_TUI);
212
    }
213
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.