source: trunk/abcl/src/org/armedbear/lisp/with-input-from-string.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;;; with-input-from-string.lisp
2;;;
3;;; Copyright (C) 2004-2005 Peter Graves
4;;; $Id: with-input-from-string.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(defmacro with-input-from-string ((var string &key index start end) &body body)
37  (multiple-value-bind (forms decls) (parse-body body)
38    `(let ((,var
39            ,(cond ((null end)
40                    `(make-string-input-stream ,string ,(or start 0)))
41                   ((symbolp end)
42                    `(if ,end
43                         (make-string-input-stream ,string
44                                                   ,(or start 0)
45                                                   ,end)
46                         (make-string-input-stream ,string
47                                                   ,(or start 0))))
48                   (t
49                    `(make-string-input-stream ,string
50                                               ,(or start 0)
51                                               ,end)))))
52       ,@decls
53       (unwind-protect
54        (multiple-value-prog1
55          (progn ,@forms)
56          ,@(when index
57              `((setf ,index (string-input-stream-current ,var)))))
58        (close ,var)))))
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