/* Markers: examining, setting and deleting.
- Copyright (C) 1985, 1997, 1998, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006,
+ 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs 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.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "lisp.h"
#include "buffer.h"
-#include "charset.h"
+#include "character.h"
/* Record one cached position found recently by
buf_charpos_to_bytepos or buf_bytepos_to_charpos. */
if (XMARKER (marker)->buffer)
{
XSETBUFFER (buf, XMARKER (marker)->buffer);
- /* Return marker's buffer only if it is not dead. */
- if (!NILP (XBUFFER (buf)->name))
- return buf;
+ /* If the buffer is dead, we're in trouble: the buffer pointer here
+ does not preserve the buffer from being GC'd (it's weak), so
+ markers have to be unlinked from their buffer as soon as the buffer
+ is killed. */
+ eassert (!NILP (XBUFFER (buf)->name));
+ return buf;
}
return Qnil;
}