source: trunk/j/src/org/armedbear/lisp/fill.lisp @ 4999

Last change on this file since 4999 was 4999, checked in by piso, 18 years ago

FILL: use SIMPLE-STRING-FILL if possible.

File size: 1.6 KB
Line 
1;;; fill.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: fill.lisp,v 1.2 2003-12-07 16:50:03 piso Exp $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19
20(in-package "SYSTEM")
21
22;;; Adapted from CMUCL.
23
24(defun list-fill (sequence item start end)
25  (do ((current (nthcdr start sequence) (cdr current))
26       (index start (1+ index)))
27      ((or (atom current) (and end (= index end)))
28       sequence)
29    (rplaca current item)))
30
31(defun vector-fill (sequence item start end)
32  (unless end
33    (setf end (length sequence)))
34  (do ((index start (1+ index)))
35      ((= index end) sequence)
36    (setf (aref sequence index) item)))
37
38(defun fill (sequence item &key (start 0) end)
39  (cond ((listp sequence)
40         (list-fill sequence item start end))
41        ((and (stringp sequence)
42              (zerop start)
43              (null end))
44         (simple-string-fill sequence item))
45        (t
46         (vector-fill sequence item start end))))
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