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be more careful when printing to check for bad objects -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-01-13 Ben Wing <ben@xemacs.org> * print.c: * print.c (internal_object_printer): * print.c (enum printing_badness): * print.c (printing_major_badness): * print.c (print_internal): Clean up the part of the code that looks for things that might lead to crashing in the print code: -- Make the "badness" messages more consistent. -- Move the checks for circularities after the checks for bad memory, since the checks for circularities involve accessing memory (which could be bad). -- Add an extra check to see if the object's implementation structure is bad memory. -- Add extra check for object itself being a null pointer or implementation pointer being null. -- Add some extra comments to help in maintaining the code.
author Ben Wing <ben@xemacs.org>
date Wed, 13 Jan 2010 06:02:42 -0600
parents 141c2920ea48
children e0db3c197671
line wrap: on
line source

/* Define stream specific console, device, and frame object for XEmacs.
   Copyright (C) 1995 Board of Trustees, University of Illinois.
   Copyright (C) 1995 Free Software Foundation, Inc.
   Copyright (C) 2002 Ben Wing.

This file is part of XEmacs.

XEmacs 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, or (at your option) any
later version.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* Written by Ben Wing. */

#ifndef INCLUDED_console_stream_impl_h_
#define INCLUDED_console_stream_impl_h_

#include "console-impl.h"
#include "console-stream.h"

DECLARE_CONSOLE_TYPE (stream);

struct stream_console
{
#ifdef NEW_GC
  struct lrecord_header header;
#endif /* NEW_GC */
  FILE *in;
  FILE *out;
  FILE *err;
  int needs_newline;
  Lisp_Object instream;
};

#ifdef NEW_GC
typedef struct stream_console Lisp_Stream_Console;

DECLARE_LRECORD (stream_console, Lisp_Stream_Console);

#define XSTREAM_CONSOLE(x) \
  XRECORD (x, stream_console, Lisp_Stream_Console)
#define wrap_stream_console(p) wrap_record (p, stream_console)
#define STREAM_CONSOLE_P(x) RECORDP (x, stream_console)
#endif /* NEW_GC */

#define CONSOLE_STREAM_DATA(con) CONSOLE_TYPE_DATA (con, stream)

#endif /* INCLUDED_console_stream_impl_h_ */