binutils-gdb/gdb/tui/tui-file.c
2000-12-15 01:01:51 +00:00

299 lines
8.3 KiB
C

/* UI_FILE - a generic STDIO like output stream.
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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. */
#include "defs.h"
#include "ui-file.h"
#include "tui/tui-file.h"
#ifdef TUI
#include "tui.h"
#include "tuiData.h"
#include "tuiIO.h"
#include "tuiCommand.h"
#endif
#include <string.h>
/* Called instead of fputs for all TUI_FILE output. */
void (*fputs_unfiltered_hook) (const char *linebuffer,
struct ui_file * stream);
/* A ``struct ui_file'' that is compatible with all the legacy
code. */
/* new */
enum streamtype
{
afile,
astring
};
/* new */
struct tui_stream
{
int *ts_magic;
enum streamtype ts_streamtype;
FILE *ts_filestream;
char *ts_strbuf;
int ts_buflen;
};
static ui_file_flush_ftype tui_file_flush;
extern ui_file_fputs_ftype tui_file_fputs;
static ui_file_isatty_ftype tui_file_isatty;
static ui_file_rewind_ftype tui_file_rewind;
static ui_file_put_ftype tui_file_put;
static ui_file_delete_ftype tui_file_delete;
static struct ui_file *tui_file_new (void);
static int tui_file_magic;
static struct ui_file *
tui_file_new (void)
{
struct tui_stream *tui = xmalloc (sizeof (struct tui_stream));
struct ui_file *file = ui_file_new ();
set_ui_file_data (file, tui, tui_file_delete);
set_ui_file_flush (file, tui_file_flush);
set_ui_file_fputs (file, tui_file_fputs);
set_ui_file_isatty (file, tui_file_isatty);
set_ui_file_rewind (file, tui_file_rewind);
set_ui_file_put (file, tui_file_put);
tui->ts_magic = &tui_file_magic;
return file;
}
static void
tui_file_delete (struct ui_file *file)
{
struct tui_stream *tmpstream = ui_file_data (file);
if (tmpstream->ts_magic != &tui_file_magic)
internal_error ("tui_file_delete: bad magic number");
if ((tmpstream->ts_streamtype == astring) &&
(tmpstream->ts_strbuf != NULL))
{
xfree (tmpstream->ts_strbuf);
}
xfree (tmpstream);
}
struct ui_file *
tui_fileopen (FILE *stream)
{
struct ui_file *file = tui_file_new ();
struct tui_stream *tmpstream = ui_file_data (file);
tmpstream->ts_streamtype = afile;
tmpstream->ts_filestream = stream;
tmpstream->ts_strbuf = NULL;
tmpstream->ts_buflen = 0;
return file;
}
struct ui_file *
tui_sfileopen (int n)
{
struct ui_file *file = tui_file_new ();
struct tui_stream *tmpstream = ui_file_data (file);
tmpstream->ts_streamtype = astring;
tmpstream->ts_filestream = NULL;
if (n > 0)
{
tmpstream->ts_strbuf = xmalloc ((n + 1) * sizeof (char));
tmpstream->ts_strbuf[0] = '\0';
}
else
/* Do not allocate the buffer now. The first time something is printed
one will be allocated by tui_file_adjust_strbuf() */
tmpstream->ts_strbuf = NULL;
tmpstream->ts_buflen = n;
return file;
}
static int
tui_file_isatty (struct ui_file *file)
{
struct tui_stream *stream = ui_file_data (file);
if (stream->ts_magic != &tui_file_magic)
internal_error ("tui_file_isatty: bad magic number");
if (stream->ts_streamtype == afile)
return (isatty (fileno (stream->ts_filestream)));
else
return 0;
}
static void
tui_file_rewind (struct ui_file *file)
{
struct tui_stream *stream = ui_file_data (file);
if (stream->ts_magic != &tui_file_magic)
internal_error ("tui_file_rewind: bad magic number");
stream->ts_strbuf[0] = '\0';
}
static void
tui_file_put (struct ui_file *file,
ui_file_put_method_ftype *write,
void *dest)
{
struct tui_stream *stream = ui_file_data (file);
if (stream->ts_magic != &tui_file_magic)
internal_error ("tui_file_put: bad magic number");
if (stream->ts_streamtype == astring)
write (dest, stream->ts_strbuf, strlen (stream->ts_strbuf));
}
/* All TUI I/O sent to the *_filtered and *_unfiltered functions
eventually ends up here. The fputs_unfiltered_hook is primarily
used by GUIs to collect all output and send it to the GUI, instead
of the controlling terminal. Only output to gdb_stdout and
gdb_stderr are sent to the hook. Everything else is sent on to
fputs to allow file I/O to be handled appropriately. */
/* FIXME: Should be broken up and moved to a TUI specific file. */
void
tui_file_fputs (const char *linebuffer, struct ui_file *file)
{
struct tui_stream *stream = ui_file_data (file);
#if defined(TUI)
extern int tui_owns_terminal;
#endif
/* NOTE: cagney/1999-10-13: The use of fputs_unfiltered_hook is
seriously discouraged. Those wanting to hook output should
instead implement their own ui_file object and install that. See
also tui_file_flush(). */
if (fputs_unfiltered_hook
&& (file == gdb_stdout
|| file == gdb_stderr))
fputs_unfiltered_hook (linebuffer, file);
else
{
#if defined(TUI)
if (tui_version && tui_owns_terminal)
{
/* If we get here somehow while updating the TUI (from
* within a tuiDo(), then we need to temporarily
* set up the terminal for GDB output. This probably just
* happens on error output.
*/
if (stream->ts_streamtype == astring)
{
tui_file_adjust_strbuf (strlen (linebuffer), file);
strcat (stream->ts_strbuf, linebuffer);
}
else
{
tuiTermUnsetup (0, (tui_version) ? cmdWin->detail.commandInfo.curch : 0);
fputs (linebuffer, stream->ts_filestream);
tuiTermSetup (0);
if (linebuffer[strlen (linebuffer) - 1] == '\n')
tuiClearCommandCharCount ();
else
tuiIncrCommandCharCountBy (strlen (linebuffer));
}
}
else
{
/* The normal case - just do a fputs() */
if (stream->ts_streamtype == astring)
{
tui_file_adjust_strbuf (strlen (linebuffer), file);
strcat (stream->ts_strbuf, linebuffer);
}
else
fputs (linebuffer, stream->ts_filestream);
}
#else
if (stream->ts_streamtype == astring)
{
tui_file_adjust_strbuf (strlen (linebuffer), file);
strcat (stream->ts_strbuf, linebuffer);
}
else
fputs (linebuffer, stream->ts_filestream);
#endif
}
}
char *
tui_file_get_strbuf (struct ui_file *file)
{
struct tui_stream *stream = ui_file_data (file);
if (stream->ts_magic != &tui_file_magic)
internal_error ("tui_file_get_strbuf: bad magic number");
return (stream->ts_strbuf);
}
/* adjust the length of the buffer by the amount necessary
to accomodate appending a string of length N to the buffer contents */
void
tui_file_adjust_strbuf (int n, struct ui_file *file)
{
struct tui_stream *stream = ui_file_data (file);
int non_null_chars;
if (stream->ts_magic != &tui_file_magic)
internal_error ("tui_file_adjust_strbuf: bad magic number");
if (stream->ts_streamtype != astring)
return;
if (stream->ts_strbuf)
{
/* There is already a buffer allocated */
non_null_chars = strlen (stream->ts_strbuf);
if (n > (stream->ts_buflen - non_null_chars - 1))
{
stream->ts_buflen = n + non_null_chars + 1;
stream->ts_strbuf = xrealloc (stream->ts_strbuf, stream->ts_buflen);
}
}
else
/* No buffer yet, so allocate one of the desired size */
stream->ts_strbuf = xmalloc ((n + 1) * sizeof (char));
}
static void
tui_file_flush (struct ui_file *file)
{
struct tui_stream *stream = ui_file_data (file);
if (stream->ts_magic != &tui_file_magic)
internal_error ("tui_file_flush: bad magic number");
/* NOTE: cagney/1999-10-12: If we've been linked with code that uses
fputs_unfiltered_hook then we assume that it doesn't need to know
about flushes. Code that does need to know about flushes can
implement a proper ui_file object. */
if (fputs_unfiltered_hook)
return;
switch (stream->ts_streamtype)
{
case astring:
break;
case afile:
fflush (stream->ts_filestream);
break;
}
}