diff options
Diffstat (limited to 'gdb/tui/tuiIO.c')
| -rw-r--r-- | gdb/tui/tuiIO.c | 453 |
1 files changed, 0 insertions, 453 deletions
diff --git a/gdb/tui/tuiIO.c b/gdb/tui/tuiIO.c deleted file mode 100644 index 31e7c23ad2b..00000000000 --- a/gdb/tui/tuiIO.c +++ /dev/null @@ -1,453 +0,0 @@ -/* TUI support I/O functions. - Copyright 1998, 1999, 2000, 2001 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 2 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, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* If we need <curses.h>, we must include it before we get "bfd.h". */ -#include "config.h" -#ifdef HAVE_NCURSES_H -#include <ncurses.h> -#else -#ifdef HAVE_CURSES_H -#include <curses.h> -#endif -#endif - -#include <stdio.h> -#include "defs.h" -#include "terminal.h" -#include "target.h" -#include "event-loop.h" -#include "command.h" -#include "top.h" -#include "readline/readline.h" -#include "tui.h" -#include "tuiData.h" -#include "tuiIO.h" -#include "tuiCommand.h" -#include "tuiWin.h" -#include "tuiGeneralWin.h" -#include "tui-file.h" -#include "ui-out.h" -#include "cli-out.h" -#include <fcntl.h> -#include <signal.h> - -/* This file controls the IO interactions between gdb and curses. - When the TUI is enabled, gdb has two modes a curses and a standard - mode. - - In curses mode, the gdb outputs are made in a curses command window. - For this, the gdb_stdout and gdb_stderr are redirected to the specific - ui_file implemented by TUI. The output is handled by tui_puts(). - The input is also controlled by curses with tui_getc(). The readline - library uses this function to get its input. Several readline hooks - are installed to redirect readline output to the TUI (see also the - note below). - - In normal mode, the gdb outputs are restored to their origin, that - is as if TUI is not used. Readline also uses its original getc() - function with stdin. - - Note: the current readline is not clean in its management of the output. - Even if we install a redisplay handler, it sometimes writes on a stdout - file. It is important to redirect every output produced by readline, - otherwise the curses window will be garbled. This is implemented with - a pipe that TUI reads and readline writes to. A gdb input handler - is created so that reading the pipe is handled automatically. - This will probably not work on non-Unix platforms. The best fix is - to make readline clean enougth so that is never write on stdout. */ - -/* TUI output files. */ -static struct ui_file *tui_stdout; -static struct ui_file *tui_stderr; -static struct ui_out *tui_out; - -/* GDB output files in non-curses mode. */ -static struct ui_file *tui_old_stdout; -static struct ui_file *tui_old_stderr; -static struct ui_out *tui_old_uiout; - -/* Readline previous hooks. */ -static Function *tui_old_rl_getc_function; -static VFunction *tui_old_rl_redisplay_function; -static VFunction *tui_old_rl_prep_terminal; -static VFunction *tui_old_rl_deprep_terminal; -static int tui_old_readline_echoing_p; - -/* Readline output stream. - Should be removed when readline is clean. */ -static FILE *tui_rl_outstream; -static FILE *tui_old_rl_outstream; -static int tui_readline_pipe[2]; - -static unsigned int _tuiHandleResizeDuringIO (unsigned int); - - -/* Print the string in the curses command window. */ -void -tui_puts (const char *string) -{ - static int tui_skip_line = -1; - char c; - WINDOW *w; - - w = cmdWin->generic.handle; - while ((c = *string++) != 0) - { - /* Catch annotation and discard them. We need two \032 and - discard until a \n is seen. */ - if (c == '\032') - { - tui_skip_line++; - } - else if (tui_skip_line != 1) - { - tui_skip_line = -1; - waddch (w, c); - } - else if (c == '\n') - tui_skip_line = -1; - } - getyx (w, cmdWin->detail.commandInfo.curLine, - cmdWin->detail.commandInfo.curch); - cmdWin->detail.commandInfo.start_line = cmdWin->detail.commandInfo.curLine; - - /* We could defer the following. */ - wrefresh (w); - fflush (stdout); -} - -/* Readline callback. - Redisplay the command line with its prompt after readline has - changed the edited text. */ -static void -tui_redisplay_readline (void) -{ - int prev_col; - int height; - int col, line; - int c_pos; - int c_line; - int in; - WINDOW *w; - char *prompt; - int start_line; - - prompt = get_prompt (); - - c_pos = -1; - c_line = -1; - w = cmdWin->generic.handle; - start_line = cmdWin->detail.commandInfo.start_line; - wmove (w, start_line, 0); - prev_col = 0; - height = 1; - for (in = 0; prompt && prompt[in]; in++) - { - waddch (w, prompt[in]); - getyx (w, line, col); - if (col < prev_col) - height++; - prev_col = col; - } - for (in = 0; in < rl_end; in++) - { - unsigned char c; - - c = (unsigned char) rl_line_buffer[in]; - if (in == rl_point) - { - getyx (w, c_line, c_pos); - } - - if (CTRL_CHAR (c) || c == RUBOUT) - { - waddch (w, '^'); - waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); - } - else - { - waddch (w, c); - } - if (c == '\n') - { - getyx (w, cmdWin->detail.commandInfo.start_line, - cmdWin->detail.commandInfo.curch); - } - getyx (w, line, col); - if (col < prev_col) - height++; - prev_col = col; - } - wclrtobot (w); - getyx (w, cmdWin->detail.commandInfo.start_line, - cmdWin->detail.commandInfo.curch); - if (c_line >= 0) - { - wmove (w, c_line, c_pos); - cmdWin->detail.commandInfo.curLine = c_line; - cmdWin->detail.commandInfo.curch = c_pos; - } - cmdWin->detail.commandInfo.start_line -= height - 1; - - wrefresh (w); - fflush(stdout); -} - -/* Readline callback to prepare the terminal. It is called once - each time we enter readline. There is nothing to do in curses mode. */ -static void -tui_prep_terminal (void) -{ -} - -/* Readline callback to restore the terminal. It is called once - each time we leave readline. There is nothing to do in curses mode. */ -static void -tui_deprep_terminal (void) -{ -} - -/* Read readline output pipe and feed the command window with it. - Should be removed when readline is clean. */ -static void -tui_readline_output (int code, gdb_client_data data) -{ - int size; - char buf[256]; - - size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); - if (size > 0 && tui_active) - { - buf[size] = 0; - tui_puts (buf); - } -} - -/* Setup the IO for curses or non-curses mode. - - In non-curses mode, readline and gdb use the standard input and - standard output/error directly. - - In curses mode, the standard output/error is controlled by TUI - with the tui_stdout and tui_stderr. The output is redirected in - the curses command window. Several readline callbacks are installed - so that readline asks for its input to the curses command window - with wgetch(). */ -void -tui_setup_io (int mode) -{ - extern int readline_echoing_p; - - if (mode) - { - /* Redirect readline to TUI. */ - tui_old_rl_redisplay_function = rl_redisplay_function; - tui_old_rl_deprep_terminal = rl_deprep_term_function; - tui_old_rl_prep_terminal = rl_prep_term_function; - tui_old_rl_getc_function = rl_getc_function; - tui_old_rl_outstream = rl_outstream; - tui_old_readline_echoing_p = readline_echoing_p; - rl_redisplay_function = tui_redisplay_readline; - rl_deprep_term_function = tui_deprep_terminal; - rl_prep_term_function = tui_prep_terminal; - rl_getc_function = tui_getc; - readline_echoing_p = 0; - rl_outstream = tui_rl_outstream; - rl_prompt = 0; - - /* Keep track of previous gdb output. */ - tui_old_stdout = gdb_stdout; - tui_old_stderr = gdb_stderr; - tui_old_uiout = uiout; - - /* Reconfigure gdb output. */ - gdb_stdout = tui_stdout; - gdb_stderr = tui_stderr; - gdb_stdlog = gdb_stdout; /* for moment */ - gdb_stdtarg = gdb_stderr; /* for moment */ - uiout = tui_out; - - /* Save tty for SIGCONT. */ - savetty (); - } - else - { - /* Restore gdb output. */ - gdb_stdout = tui_old_stdout; - gdb_stderr = tui_old_stderr; - gdb_stdlog = gdb_stdout; /* for moment */ - gdb_stdtarg = gdb_stderr; /* for moment */ - uiout = tui_old_uiout; - - /* Restore readline. */ - rl_redisplay_function = tui_old_rl_redisplay_function; - rl_deprep_term_function = tui_old_rl_deprep_terminal; - rl_prep_term_function = tui_old_rl_prep_terminal; - rl_getc_function = tui_old_rl_getc_function; - rl_outstream = tui_old_rl_outstream; - readline_echoing_p = tui_old_readline_echoing_p; - - /* Save tty for SIGCONT. */ - savetty (); - } -} - -#ifdef SIGCONT -/* Catch SIGCONT to restore the terminal and refresh the screen. */ -static void -tui_cont_sig (int sig) -{ - if (tui_active) - { - /* Restore the terminal setting because another process (shell) - might have changed it. */ - resetty (); - - /* Force a refresh of the screen. */ - tuiRefreshAll (); - - /* Update cursor position on the screen. */ - wmove (cmdWin->generic.handle, - cmdWin->detail.commandInfo.start_line, - cmdWin->detail.commandInfo.curch); - wrefresh (cmdWin->generic.handle); - } - signal (sig, tui_cont_sig); -} -#endif - -/* Initialize the IO for gdb in curses mode. */ -void -tui_initialize_io () -{ -#ifdef SIGCONT - signal (SIGCONT, tui_cont_sig); -#endif - - /* Create tui output streams. */ - tui_stdout = tui_fileopen (stdout); - tui_stderr = tui_fileopen (stderr); - tui_out = tui_out_new (tui_stdout); - - /* Create the default UI. It is not created because we installed - a init_ui_hook. */ - uiout = cli_out_new (gdb_stdout); - - /* Temporary solution for readline writing to stdout: - redirect readline output in a pipe, read that pipe and - output the content in the curses command window. */ - if (pipe (tui_readline_pipe) != 0) - { - fprintf_unfiltered (gdb_stderr, "Cannot create pipe for readline"); - exit (1); - } - tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); - if (tui_rl_outstream == 0) - { - fprintf_unfiltered (gdb_stderr, "Cannot redirect readline output"); - exit (1); - } - setlinebuf (tui_rl_outstream); - -#ifdef O_NONBLOCK - (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); -#else -#ifdef O_NDELAY - (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); -#endif -#endif - - add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); -} - -/* Get a character from the command window. This is called from the readline - package. */ -int -tui_getc (FILE *fp) -{ - int ch; - WINDOW *w; - - w = cmdWin->generic.handle; - - /* Flush readline output. */ - tui_readline_output (GDB_READABLE, 0); - - ch = wgetch (w); - ch = _tuiHandleResizeDuringIO (ch); - - /* The \n must be echoed because it will not be printed by readline. */ - if (ch == '\n') - { - /* When hitting return with an empty input, gdb executes the last - command. If we emit a newline, this fills up the command window - with empty lines with gdb prompt at beginning. Instead of that, - stay on the same line but provide a visual effect to show the - user we recognized the command. */ - if (rl_end == 0) - { - wmove (w, cmdWin->detail.commandInfo.curLine, 0); - - /* Clear the line. This will blink the gdb prompt since - it will be redrawn at the same line. */ - wclrtoeol (w); - wrefresh (w); - napms (20); - } - else - { - wmove (w, cmdWin->detail.commandInfo.curLine, - cmdWin->detail.commandInfo.curch); - waddch (w, ch); - } - } - - if (m_isCommandChar (ch)) - { /* Handle prev/next/up/down here */ - ch = tuiDispatchCtrlChar (ch); - } - - if (ch == '\n' || ch == '\r' || ch == '\f') - cmdWin->detail.commandInfo.curch = 0; -#if 0 - else - tuiIncrCommandCharCountBy (1); -#endif - if (ch == KEY_BACKSPACE) - return '\b'; - - return ch; -} - - -/* Cleanup when a resize has occured. - Returns the character that must be processed. */ -static unsigned int -_tuiHandleResizeDuringIO (unsigned int originalCh) -{ - if (tuiWinResized ()) - { - tuiRefreshAll (); - dont_repeat (); - tuiSetWinResizedTo (FALSE); - return '\n'; - } - else - return originalCh; -} |