source: trunk/j/src/org/armedbear/lisp/read-sequence.lisp @ 9266

Last change on this file since 9266 was 8858, checked in by piso, 16 years ago

Moved SYS::READ-SPECIALIZED-VECTOR-UNSIGNED-BYTE-8 to Primitives.java as SYS:READ-VECTOR-UB8.

File size: 2.1 KB
Line 
1;;; read-sequence.lisp
2;;;
3;;; Copyright (C) 2004-2005 Peter Graves
4;;; $Id: read-sequence.lisp,v 1.4 2005-03-30 15:47:32 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(defun read-sequence (sequence stream &key (start 0) end)
23  (require-type start '(integer 0))
24  (if end
25      (require-type end '(integer 0))
26      (setf end (length sequence)))
27  (let* ((element-type (stream-element-type stream)))
28    (cond ((eq element-type 'character)
29           (do ((pos start (1+ pos)))
30               ((>= pos end) pos)
31             (let ((element (read-char stream nil :eof)))
32               (when (eq element :eof)
33                 (return pos))
34               (setf (elt sequence pos) element))))
35          ((equal element-type '(unsigned-byte 8))
36           (if (and (vectorp sequence)
37                    (equal (array-element-type sequence) '(unsigned-byte 8)))
38               (read-vector-ub8 sequence stream start end)
39               (do ((pos start (1+ pos)))
40                   ((>= pos end) pos)
41                 (let ((element (read-8-bits stream nil :eof)))
42                   (when (eq element :eof)
43                     (return pos))
44                   (setf (elt sequence pos) element)))))
45          (t
46           (do ((pos start (1+ pos)))
47               ((>= pos end) pos)
48             (let ((element (read-byte stream nil :eof)))
49               (when (eq element :eof)
50                 (return pos))
51               (setf (elt sequence pos) element)))))))
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