source: trunk/abcl/src/org/armedbear/lisp/adjust_array.java @ 12517

Last change on this file since 12517 was 12288, checked in by vvoutilainen, 15 years ago

Don't extend Lisp in LispObject, static import Lisp wherever
necessary. Patch by Douglas R. Miles.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 5.5 KB
Line 
1/*
2 * adjust_array.java
3 *
4 * Copyright (C) 2004-2007 Peter Graves
5 * $Id: adjust_array.java 12288 2009-11-29 22:00:12Z vvoutilainen $
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
20 *
21 * As a special exception, the copyright holders of this library give you
22 * permission to link this library with independent modules to produce an
23 * executable, regardless of the license terms of these independent
24 * modules, and to copy and distribute the resulting executable under
25 * terms of your choice, provided that you also meet, for each linked
26 * independent module, the terms and conditions of the license of that
27 * module.  An independent module is a module which is not derived from
28 * or based on this library.  If you modify this library, you may extend
29 * this exception to your version of the library, but you are not
30 * obligated to do so.  If you do not wish to do so, delete this
31 * exception statement from your version.
32 */
33
34package org.armedbear.lisp;
35
36import static org.armedbear.lisp.Lisp.*;
37
38// ### %adjust-array array new-dimensions element-type initial-element
39// initial-element-p initial-contents initial-contents-p fill-pointer
40// displaced-to displaced-index-offset => new-array
41public final class adjust_array extends Primitive
42{
43    public adjust_array()
44    {
45        super("%adjust-array", PACKAGE_SYS, false);
46    }
47
48    @Override
49    public LispObject execute(LispObject[] args)
50    {
51        if (args.length != 10)
52            return error(new WrongNumberOfArgumentsException(this));
53        AbstractArray array = checkArray(args[0]);
54        LispObject dimensions = args[1];
55        LispObject elementType = args[2];
56        boolean initialElementProvided = args[4] != NIL;
57        boolean initialContentsProvided = args[6] != NIL;
58        LispObject initialElement = initialElementProvided ? args[3] : null;
59        LispObject initialContents = initialContentsProvided ? args[5] : null;
60        LispObject fillPointer = args[7];
61        LispObject displacedTo = args[8];
62        LispObject displacedIndexOffset = args[9];
63        if (initialElementProvided && initialContentsProvided) {
64            return error(new LispError("ADJUST-ARRAY: cannot specify both initial element and initial contents."));
65        }
66        if (elementType != array.getElementType() &&
67            getUpgradedArrayElementType(elementType) != array.getElementType())
68        {
69            return error(new LispError("ADJUST-ARRAY: incompatible element type."));
70        }
71        if (array.getRank() == 0) {
72            return array.adjustArray(new int[0], initialElement, initialContents);
73        }
74        if (!initialElementProvided && array.getElementType() == T)
75            initialElement = Fixnum.ZERO;
76        if (array.getRank() == 1) {
77            final int newSize;
78            if (dimensions instanceof Cons && dimensions.length() == 1)
79                newSize = Fixnum.getValue(dimensions.car());
80            else
81                newSize = Fixnum.getValue(dimensions);
82            if (array instanceof AbstractVector) {
83                AbstractVector v = (AbstractVector) array;
84                AbstractArray v2;
85                if (displacedTo != NIL) {
86                    final int displacement;
87                    if (displacedIndexOffset == NIL)
88                        displacement = 0;
89                    else
90                        displacement = Fixnum.getValue(displacedIndexOffset);
91                    v2 = v.adjustArray(newSize,
92                                        checkArray(displacedTo),
93                                        displacement);
94                } else {
95                    v2 = v.adjustArray(newSize,
96                                        initialElement,
97                                        initialContents);
98                }
99                if (fillPointer != NIL)
100                    v2.setFillPointer(fillPointer);
101                return v2;
102            }
103        }
104        // rank > 1
105        final int rank = dimensions.listp() ? dimensions.length() : 1;
106        int[] dimv = new int[rank];
107        if (dimensions.listp()) {
108            for (int i = 0; i < rank; i++) {
109                LispObject dim = dimensions.car();
110                dimv[i] = Fixnum.getValue(dim);
111                dimensions = dimensions.cdr();
112            }
113        } else
114            dimv[0] = Fixnum.getValue(dimensions);
115
116        if (displacedTo != NIL) {
117            final int displacement;
118            if (displacedIndexOffset == NIL)
119                displacement = 0;
120            else
121                displacement = Fixnum.getValue(displacedIndexOffset);
122            return array.adjustArray(dimv,
123                                     checkArray(displacedTo),
124                                     displacement);
125        } else {
126            return array.adjustArray(dimv,
127                                     initialElement,
128                                     initialContents);
129        }
130    }
131
132    private static final Primitive _ADJUST_ARRAY = new adjust_array();
133}
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