diff options
Diffstat (limited to 'lisp/emacs-lisp')
| -rw-r--r-- | lisp/emacs-lisp/ring.el | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/lisp/emacs-lisp/ring.el b/lisp/emacs-lisp/ring.el index 95b993001fa..4b134801984 100644 --- a/lisp/emacs-lisp/ring.el +++ b/lisp/emacs-lisp/ring.el @@ -1,5 +1,23 @@ -;;; Ring Code -;;;============================================================================ +;;; ring.el --- handle rings of marks + +;; Copyright (C) 1992 Free Software Foundation, Inc. + +;; This file is part of GNU Emacs. + +;; 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 1, 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 +;; 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 GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + ;;; This code defines a ring data structure. A ring is a ;;; (hd-index tl-index . vector) ;;; list. You can insert to, remove from, and rotate a ring. When the ring @@ -99,3 +117,5 @@ Answer is guaranteed to be non-negative, and less than m." (vec-index (comint-mod (+ index hd) (length vec)))) (aref vec vec-index))))) + +;;; ring.el ends here |