void
change_line_handler (int editing)
{
struct ui *ui = current_ui;
/* We can only have one instance of readline, so we only allow
editing on the main UI. */
if (ui != main_ui)
return;
/* Don't try enabling editing if the interpreter doesn't support it
(e.g., MI). */
if (!interp_supports_command_editing (top_level_interpreter ())
|| !interp_supports_command_editing (command_interp ()))
return;
if (editing)
{
gdb_assert (ui == main_ui);
/* Turn on editing by using readline. */
ui->call_readline = gdb_rl_callback_read_char_wrapper;
}
else
{
/* Turn off editing by using gdb_readline_no_editing_callback. */
if (ui->command_editing)
gdb_rl_callback_handler_remove ();
ui->call_readline = gdb_readline_no_editing_callback;
}
ui->command_editing = editing;
}
static struct interp *
find_mi_interpreter (void)
{
struct interp *interp;
interp = top_level_interpreter ();
if (ui_out_is_mi_like_p (interp_ui_out (interp)))
return interp;
interp = command_interp ();
if (ui_out_is_mi_like_p (interp_ui_out (interp)))
return interp;
return NULL;
}
