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
+ Note SCz/2001-07-21: 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. */
+ to make readline clean enougth so that is never write on stdout.
+
+ Note SCz/2002-09-01: we now use more readline hooks and it seems that
+ with them we don't need the pipe anymore (verified by creating the pipe
+ and closing its end so that write causes a SIGPIPE). The old pipe code
+ is still there and can be conditionally removed by
+ #undef TUI_USE_PIPE_FOR_READLINE. */
+
+/* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */
+#define TUI_USE_PIPE_FOR_READLINE
+/*#undef TUI_USE_PIPE_FOR_READLINE*/
/* TUI output files. */
static struct ui_file *tui_stdout;
Should be removed when readline is clean. */
static FILE *tui_rl_outstream;
static FILE *tui_old_rl_outstream;
+#ifdef TUI_USE_PIPE_FOR_READLINE
static int tui_readline_pipe[2];
+#endif
static unsigned int _tuiHandleResizeDuringIO (unsigned int);
+static void
+tui_putc (char c)
+{
+ char buf[2];
+
+ buf[0] = c;
+ buf[1] = 0;
+ tui_puts (buf);
+}
/* Print the string in the curses command window. */
void
{
}
+#ifdef TUI_USE_PIPE_FOR_READLINE
/* Read readline output pipe and feed the command window with it.
Should be removed when readline is clean. */
static void
tui_puts (buf);
}
}
+#endif
+
+/* Return the portion of PATHNAME that should be output when listing
+ possible completions. If we are hacking filename completion, we
+ are only interested in the basename, the portion following the
+ final slash. Otherwise, we return what we were passed.
+
+ Comes from readline/complete.c */
+static char *
+printable_part (pathname)
+ char *pathname;
+{
+ char *temp;
+
+ temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL;
+#if defined (__MSDOS__)
+ if (rl_filename_completion_desired && temp == 0 && isalpha (pathname[0]) && pathname[1] == ':')
+ temp = pathname + 1;
+#endif
+ return (temp ? ++temp : pathname);
+}
+
+/* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we
+ are using it, check for and output a single character for `special'
+ filenames. Return the number of characters we output. */
+
+#define PUTX(c) \
+ do { \
+ if (CTRL_CHAR (c)) \
+ { \
+ tui_puts ("^"); \
+ tui_putc (UNCTRL (c)); \
+ printed_len += 2; \
+ } \
+ else if (c == RUBOUT) \
+ { \
+ tui_puts ("^?"); \
+ printed_len += 2; \
+ } \
+ else \
+ { \
+ tui_putc (c); \
+ printed_len++; \
+ } \
+ } while (0)
+
+static int
+print_filename (to_print, full_pathname)
+ char *to_print, *full_pathname;
+{
+ int printed_len = 0;
+ char *s;
+
+ for (s = to_print; *s; s++)
+ {
+ PUTX (*s);
+ }
+ return printed_len;
+}
+
+/* The user must press "y" or "n". Non-zero return means "y" pressed.
+ Comes from readline/complete.c */
+static int
+get_y_or_n ()
+{
+ extern int _rl_abort_internal ();
+ int c;
+
+ for (;;)
+ {
+ c = rl_read_key ();
+ if (c == 'y' || c == 'Y' || c == ' ')
+ return (1);
+ if (c == 'n' || c == 'N' || c == RUBOUT)
+ return (0);
+ if (c == ABORT_CHAR)
+ _rl_abort_internal ();
+ beep ();
+ }
+}
+
+/* A convenience function for displaying a list of strings in
+ columnar format on readline's output stream. MATCHES is the list
+ of strings, in argv format, LEN is the number of strings in MATCHES,
+ and MAX is the length of the longest string in MATCHES.
+
+ Comes from readline/complete.c and modified to write in
+ the TUI command window using tui_putc/tui_puts. */
+static void
+tui_rl_display_match_list (matches, len, max)
+ char **matches;
+ int len, max;
+{
+ typedef int QSFUNC (const void *, const void *);
+ extern int _rl_qsort_string_compare (const void*, const void*);
+ extern int _rl_print_completions_horizontally;
+
+ int count, limit, printed_len;
+ int i, j, k, l;
+ char *temp;
+
+ /* Screen dimension correspond to the TUI command window. */
+ int screenwidth = cmdWin->generic.width;
+
+ /* If there are many items, then ask the user if she really wants to
+ see them all. */
+ if (len >= rl_completion_query_items)
+ {
+ char msg[256];
+
+ sprintf (msg, "\nDisplay all %d possibilities? (y or n)", len);
+ tui_puts (msg);
+ if (get_y_or_n () == 0)
+ {
+ tui_puts ("\n");
+ return;
+ }
+ }
+
+ /* How many items of MAX length can we fit in the screen window? */
+ max += 2;
+ limit = screenwidth / max;
+ if (limit != 1 && (limit * max == screenwidth))
+ limit--;
+
+ /* Avoid a possible floating exception. If max > screenwidth,
+ limit will be 0 and a divide-by-zero fault will result. */
+ if (limit == 0)
+ limit = 1;
+
+ /* How many iterations of the printing loop? */
+ count = (len + (limit - 1)) / limit;
+
+ /* Watch out for special case. If LEN is less than LIMIT, then
+ just do the inner printing loop.
+ 0 < len <= limit implies count = 1. */
+
+ /* Sort the items if they are not already sorted. */
+ if (rl_ignore_completion_duplicates == 0)
+ qsort (matches + 1, len, sizeof (char *),
+ (QSFUNC *)_rl_qsort_string_compare);
+
+ tui_putc ('\n');
+
+ if (_rl_print_completions_horizontally == 0)
+ {
+ /* Print the sorted items, up-and-down alphabetically, like ls. */
+ for (i = 1; i <= count; i++)
+ {
+ for (j = 0, l = i; j < limit; j++)
+ {
+ if (l > len || matches[l] == 0)
+ break;
+ else
+ {
+ temp = printable_part (matches[l]);
+ printed_len = print_filename (temp, matches[l]);
+
+ if (j + 1 < limit)
+ for (k = 0; k < max - printed_len; k++)
+ tui_putc (' ');
+ }
+ l += count;
+ }
+ tui_putc ('\n');
+ }
+ }
+ else
+ {
+ /* Print the sorted items, across alphabetically, like ls -x. */
+ for (i = 1; matches[i]; i++)
+ {
+ temp = printable_part (matches[i]);
+ printed_len = print_filename (temp, matches[i]);
+ /* Have we reached the end of this line? */
+ if (matches[i+1])
+ {
+ if (i && (limit > 1) && (i % limit) == 0)
+ tui_putc ('\n');
+ else
+ for (k = 0; k < max - printed_len; k++)
+ tui_putc (' ');
+ }
+ }
+ tui_putc ('\n');
+ }
+}
/* Setup the IO for curses or non-curses mode.
- In non-curses mode, readline and gdb use the standard input and
readline_echoing_p = 0;
rl_outstream = tui_rl_outstream;
rl_prompt = 0;
+ rl_completion_display_matches_hook = tui_rl_display_match_list;
+ rl_already_prompted = 0;
/* Keep track of previous gdb output. */
tui_old_stdout = gdb_stdout;
rl_prep_term_function = tui_old_rl_prep_terminal;
rl_getc_function = tui_old_rl_getc_function;
rl_outstream = tui_old_rl_outstream;
+ rl_completion_display_matches_hook = 0;
readline_echoing_p = tui_old_readline_echoing_p;
+ rl_already_prompted = 1;
/* Save tty for SIGCONT. */
savetty ();
a init_ui_hook. */
uiout = cli_out_new (gdb_stdout);
+#ifdef TUI_USE_PIPE_FOR_READLINE
/* 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. */
(void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY);
#endif
#endif
-
add_file_handler (tui_readline_pipe[0], tui_readline_output, 0);
+#else
+ tui_rl_outstream = stdout;
+#endif
}
/* Get a character from the command window. This is called from the readline
w = cmdWin->generic.handle;
+#ifdef TUI_USE_PIPE_FOR_READLINE
/* Flush readline output. */
tui_readline_output (GDB_READABLE, 0);
-
+#endif
+
ch = wgetch (w);
ch = _tuiHandleResizeDuringIO (ch);
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