source: branches/streams/abcl/src/org/armedbear/lisp/dotimes.java

Last change on this file was 14466, checked in by rschlatte, 12 years ago

call type_error when possible

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 5.1 KB
Line 
1/*
2 * dotimes.java
3 *
4 * Copyright (C) 2003-2006 Peter Graves
5 * $Id: dotimes.java 14466 2013-04-24 12:50:40Z rschlatte $
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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, 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
38public final class dotimes extends SpecialOperator
39{
40  private dotimes()
41  {
42    super(Symbol.DOTIMES);
43  }
44
45  @Override
46  public LispObject execute(LispObject args, Environment env)
47
48  {
49    LispObject bodyForm = args.cdr();
50    args = args.car();
51    Symbol var = checkSymbol(args.car());
52    LispObject countForm = args.cadr();
53    final LispThread thread = LispThread.currentThread();
54    LispObject resultForm = args.cdr().cdr().car();
55    final SpecialBindingsMark mark = thread.markSpecialBindings();
56
57    LispObject bodyAndDecls = parseBody(bodyForm, false);
58    LispObject specials = parseSpecials(bodyAndDecls.NTH(1));
59    bodyForm = bodyAndDecls.car();
60
61    LispObject blockId = new LispObject();
62    final Environment ext = new Environment(env);
63    try
64      {
65        ext.addBlock(NIL, blockId);
66
67        LispObject limit = eval(countForm, ext, thread);
68        LispObject localTags = preprocessTagBody(bodyForm, ext);
69
70        LispObject result;
71        // Establish a reusable binding.
72        final Object binding;
73        if (specials != NIL && memq(var, specials))
74          {
75            thread.bindSpecial(var, null);
76            binding = thread.getSpecialBinding(var);
77            ext.declareSpecial(var);
78          }
79        else if (var.isSpecialVariable())
80          {
81            thread.bindSpecial(var, null);
82            binding = thread.getSpecialBinding(var);
83          }
84        else
85          {
86            ext.bind(var, null);
87            binding = ext.getBinding(var);
88          }
89        while (specials != NIL)
90          {
91            ext.declareSpecial(checkSymbol(specials.car()));
92            specials = specials.cdr();
93          }
94        if (limit instanceof Fixnum)
95          {
96            int count = ((Fixnum)limit).value;
97            int i;
98            for (i = 0; i < count; i++)
99              {
100                if (binding instanceof SpecialBinding)
101                  ((SpecialBinding)binding).value = Fixnum.getInstance(i);
102                else
103                  ((Binding)binding).value = Fixnum.getInstance(i);
104
105                processTagBody(bodyForm, localTags, ext);
106
107                if (interrupted)
108                  handleInterrupt();
109              }
110            if (binding instanceof SpecialBinding)
111              ((SpecialBinding)binding).value = Fixnum.getInstance(i);
112            else
113              ((Binding)binding).value = Fixnum.getInstance(i);
114            result = eval(resultForm, ext, thread);
115          }
116        else if (limit instanceof Bignum)
117          {
118            LispObject i = Fixnum.ZERO;
119            while (i.isLessThan(limit))
120              {
121                if (binding instanceof SpecialBinding)
122                  ((SpecialBinding)binding).value = i;
123                else
124                  ((Binding)binding).value = i;
125
126                processTagBody(bodyForm, localTags, ext);
127
128                i = i.incr();
129                if (interrupted)
130                  handleInterrupt();
131              }
132            if (binding instanceof SpecialBinding)
133              ((SpecialBinding)binding).value = i;
134            else
135              ((Binding)binding).value = i;
136            result = eval(resultForm, ext, thread);
137          }
138        else
139          return type_error(limit, Symbol.INTEGER);
140        return result;
141      }
142    catch (Return ret)
143      {
144        if (ret.getBlock() == blockId)
145          {
146            return ret.getResult();
147          }
148        throw ret;
149      }
150    finally
151      {
152        thread.resetSpecialBindings(mark);
153        ext.inactive = true;
154      }
155  }
156
157  private static final dotimes DOTIMES = new dotimes();
158}
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