old-cross-binutils/gdb/tui/tui-command.c
Doug Evans 518be979d9 Speed up GDB's TUI output
In the TUI mode, we call wrefresh after outputting every single
character.  This results in the I/O becoming very slow.  Fix this by
delaying refreshing the console window until an explicit flush of
gdb_stdout is requested, or a write to any other (unbuffered) file is
done.

2015-02-04  Doug Evans  <dje@google.com>
	    Pedro Alves  <palves@redhat.com>
	    Eli Zaretskii  <eliz@gnu.org>

	PR tui/17810
	* tui/tui-command.c (tui_refresh_cmd_win): New function.
	* tui/tui-command.c (tui_refresh_cmd_win): Declare.
	* tui/tui-file.c: #include tui/tui-command.h.
	(tui_file_fputs): Refresh command window if stream is not gdb_stdout.
	(tui_file_flush): Refresh command window if stream is gdb_stdout.
	* tui/tui-io.c (tui_puts): Remove calls to wrefresh, fflush.
2015-02-04 12:27:28 +01:00

146 lines
3.5 KiB
C

/* Specific command window processing.
Copyright (C) 1998-2015 Free Software Foundation, Inc.
Contributed by Hewlett-Packard Company.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include <ctype.h>
#include "tui/tui.h"
#include "tui/tui-data.h"
#include "tui/tui-win.h"
#include "tui/tui-io.h"
#include "tui/tui-command.h"
#include "gdb_curses.h"
/*****************************************
** STATIC LOCAL FUNCTIONS FORWARD DECLS **
******************************************/
/*****************************************
** PUBLIC FUNCTIONS **
******************************************/
/* Dispatch the correct tui function based upon the control
character. */
unsigned int
tui_dispatch_ctrl_char (unsigned int ch)
{
struct tui_win_info *win_info = tui_win_with_focus ();
/* Handle the CTRL-L refresh for each window. */
if (ch == '\f')
tui_refresh_all_win ();
/* If the command window has the logical focus, or no-one does
assume it is the command window; in this case, pass the character
on through and do nothing here. */
if (win_info == NULL || win_info == TUI_CMD_WIN)
return ch;
else
{
unsigned int c = 0, ch_copy = ch;
int i;
char *term;
/* If this is an xterm, page next/prev keys aren't returned by
keypad as a single char, so we must handle them here. Seems
like a bug in the curses library? */
term = (char *) getenv ("TERM");
if (term)
{
for (i = 0; term[i]; i++)
term[i] = toupper (term[i]);
if ((strcmp (term, "XTERM") == 0)
&& key_is_start_sequence (ch))
{
unsigned int page_ch = 0;
unsigned int tmp_char;
WINDOW *w = TUI_CMD_WIN->generic.handle;
tmp_char = 0;
while (!key_is_end_sequence (tmp_char))
{
tmp_char = (int) wgetch (w);
if (tmp_char == ERR)
{
return ch;
}
if (!tmp_char)
break;
if (tmp_char == 53)
page_ch = KEY_PPAGE;
else if (tmp_char == 54)
page_ch = KEY_NPAGE;
else
{
return 0;
}
}
ch_copy = page_ch;
}
}
switch (ch_copy)
{
case KEY_NPAGE:
tui_scroll_forward (win_info, 0);
break;
case KEY_PPAGE:
tui_scroll_backward (win_info, 0);
break;
case KEY_DOWN:
case KEY_SF:
tui_scroll_forward (win_info, 1);
break;
case KEY_UP:
case KEY_SR:
tui_scroll_backward (win_info, 1);
break;
case KEY_RIGHT:
tui_scroll_left (win_info, 1);
break;
case KEY_LEFT:
tui_scroll_right (win_info, 1);
break;
case '\f':
break;
default:
c = ch_copy;
break;
}
return c;
}
}
/* See tui-command.h. */
void
tui_refresh_cmd_win (void)
{
WINDOW *w = TUI_CMD_WIN->generic.handle;
wrefresh (w);
/* FIXME: It's not clear why this is here.
It was present in the original tui_puts code and is kept in order to
not introduce some subtle breakage. */
fflush (stdout);
}