source: trunk/abcl/src/org/armedbear/lisp/read-sequence.lisp @ 14215

Last change on this file since 14215 was 14070, checked in by ehuelsmann, 8 years ago

Expand types before checking them: fixes Drakma.

Patch by Stas Boukarev.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.9 KB
Line 
1;;; read-sequence.lisp
2;;;
3;;; Copyright (C) 2004-2005 Peter Graves
4;;; $Id: read-sequence.lisp 14070 2012-08-11 12:07:52Z ehuelsmann $
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(in-package #:system)
33
34(defun read-sequence (sequence stream &key (start 0) end)
35  (declare (type stream stream))
36  (require-type start '(integer 0))
37  (if end
38      (require-type end '(integer 0))
39      (setf end (length sequence)))
40  (let* ((element-type (expand-deftype (stream-element-type stream))))
41    (cond ((eq element-type 'character)
42           (do ((pos start (1+ pos)))
43               ((>= pos end) pos)
44             (let ((element (read-char stream nil :eof)))
45               (when (eq element :eof)
46                 (return pos))
47               (setf (elt sequence pos) element))))
48          ((equal element-type '(unsigned-byte 8))
49           (if (and (vectorp sequence)
50                    (equal (array-element-type sequence) '(unsigned-byte 8)))
51               (read-vector-unsigned-byte-8 sequence stream start end)
52               (do ((pos start (1+ pos)))
53                   ((>= pos end) pos)
54                 (let ((element (read-8-bits stream nil :eof)))
55                   (when (eq element :eof)
56                     (return pos))
57                   (setf (elt sequence pos) element)))))
58          (t
59           (do ((pos start (1+ pos)))
60               ((>= pos end) pos)
61             (let ((element (read-byte stream nil :eof)))
62               (when (eq element :eof)
63                 (return pos))
64               (setf (elt sequence pos) element)))))))
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