source: trunk/j/src/org/armedbear/lisp/read-sequence.lisp @ 11297

Last change on this file since 11297 was 11297, checked in by ehuelsmann, 13 years ago

Set Id keyword for expansion.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.1 KB
Line 
1;;; read-sequence.lisp
2;;;
3;;; Copyright (C) 2004-2005 Peter Graves
4;;; $Id: read-sequence.lisp 11297 2008-08-31 13:26:45Z 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(in-package #:system)
21
22(defun read-sequence (sequence stream &key (start 0) end)
23  (declare (type stream stream))
24  (require-type start '(integer 0))
25  (if end
26      (require-type end '(integer 0))
27      (setf end (length sequence)))
28  (let* ((element-type (stream-element-type stream)))
29    (cond ((eq element-type 'character)
30           (do ((pos start (1+ pos)))
31               ((>= pos end) pos)
32             (let ((element (read-char stream nil :eof)))
33               (when (eq element :eof)
34                 (return pos))
35               (setf (elt sequence pos) element))))
36          ((equal element-type '(unsigned-byte 8))
37           (if (and (vectorp sequence)
38                    (equal (array-element-type sequence) '(unsigned-byte 8)))
39               (read-vector-unsigned-byte-8 sequence stream start end)
40               (do ((pos start (1+ pos)))
41                   ((>= pos end) pos)
42                 (let ((element (read-8-bits stream nil :eof)))
43                   (when (eq element :eof)
44                     (return pos))
45                   (setf (elt sequence pos) element)))))
46          (t
47           (do ((pos start (1+ pos)))
48               ((>= pos end) pos)
49             (let ((element (read-byte stream nil :eof)))
50               (when (eq element :eof)
51                 (return pos))
52               (setf (elt sequence pos) element)))))))
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