source: trunk/abcl/src/org/armedbear/lisp/map1.lisp @ 14207

Last change on this file since 14207 was 11391, checked in by vvoutilainen, 12 years ago

ABCL license is GPL + Classpath exception. This was intended
by Peter Graves, the original author. For reference, see
http://sourceforge.net/mailarchive/forum.php?thread_name=20040721115302.839%40prufrock&forum_name=armedbear-j-announce

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.6 KB
Line 
1;;; map1.lisp
2;;;
3;;; Copyright (C) 2003-2005 Peter Graves
4;;; $Id: map1.lisp 11391 2008-11-15 22:38:34Z vvoutilainen $
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;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
31
32;;; Adapted from CMUCL.
33
34(in-package #:system)
35
36(defun map1 (function original-arglists accumulate take-car)
37  (let* ((arglists (copy-list original-arglists))
38   (ret-list (list nil))
39   (temp ret-list))
40    (do ((res nil)
41   (args '() '()))
42        ((dolist (x arglists nil) (if (null x) (return t)))
43         (if accumulate
44             (cdr ret-list)
45             (car original-arglists)))
46      (do ((l arglists (cdr l)))
47          ((null l))
48  (push (if take-car (caar l) (car l)) args)
49  (setf (car l) (cdar l)))
50      (setq res (apply function (nreverse args)))
51      (case accumulate
52  (:nconc (setq temp (last (nconc temp res))))
53  (:list (rplacd temp (list res))
54         (setq temp (cdr temp)))))))
55
56(defun mapcan (function list &rest more-lists)
57  (map1 function (cons list more-lists) :nconc t))
58
59(defun mapl (function list &rest more-lists)
60  (map1 function (cons list more-lists) nil nil))
61
62(defun maplist (function list &rest more-lists)
63  (map1 function (cons list more-lists) :list nil))
64
65(defun mapcon (function list &rest more-lists)
66  (map1 function (cons list more-lists) :nconc nil))
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