source: trunk/j/src/org/armedbear/lisp/sequences.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: 1.6 KB
Line 
1;;; sequences.lisp
2;;;
3;;; Copyright (C) 2003-2005 Peter Graves
4;;; $Id: sequences.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(defmacro type-specifier-atom (type)
23  `(if (atom ,type) ,type (car ,type)))
24
25(defun make-sequence-of-type (type length)
26  (case (type-specifier-atom type)
27    (list
28     (make-list length))
29    ((bit-vector simple-bit-vector)
30     (make-array length :element-type 'bit))
31    ((simple-base-string simple-string string)
32     (make-string length))
33    ((simple-vector vector)
34     (if (cadr type)
35         (make-array length :element-type (cadr type))
36         (make-array length)))
37    (nil-vector
38     (make-array length :element-type nil))
39    (simple-array
40     (if (cadr type)
41         (make-array length :element-type (cadr type))
42         (make-array length)))
43    (t
44     (error "MAKE-SEQUENCE-OF-TYPE: unsupported case ~S" type))))
45
46(defmacro make-sequence-like (sequence length)
47  `(make-sequence-of-type (type-of ,sequence) ,length))
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