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1   /*
2    * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  /*
26   * COMPONENT_NAME: idl.parser
27   *
28   * ORIGINS: 27
29   *
30   * Licensed Materials - Property of IBM
31   * 5639-D57 (C) COPYRIGHT International Business Machines Corp. 1997, 1999
32   * RMI-IIOP v1.0
33   *
34   */
35  
36  package com.sun.tools.corba.se.idl.constExpr;
37  
38  // NOTES:
39  
40  import com.sun.tools.corba.se.idl.Util;
41  import java.math.BigInteger;
42  
43  public class ShiftLeft extends BinaryExpr
44  {
45    protected ShiftLeft (Expression leftOperand, Expression rightOperand)
46    {
47      super ("<<", leftOperand, rightOperand);
48    } // ctor
49  
50    public Object evaluate () throws EvaluationException
51    {
52      try
53      {
54        Number l = (Number)left ().evaluate ();
55        Number r = (Number)right ().evaluate ();
56  
57        if (l instanceof Float || l instanceof Double || r instanceof Float || r instanceof Double)
58        {
59          String[] parameters = {Util.getMessage ("EvaluationException.left"), left ().value ().getClass ().getName (), right ().value ().getClass ().getName ()};
60          throw new EvaluationException (Util.getMessage ("EvaluationException.1", parameters));
61        }
62        else
63        {
64          // Shift left (<<)
65          //daz        value (new Long (l.longValue () << r.longValue ()));
66          BigInteger bL = (BigInteger)coerceToTarget (l);
67          BigInteger bR = (BigInteger)r;
68  
69          BigInteger ls  = bL.shiftLeft (bR.intValue ());
70  
71          if (type ().indexOf ("short") >= 0)
72            ls = ls.mod (twoPow16);
73          else if (type ().indexOf ("long") >= 0)
74            ls = ls.mod (twoPow32);
75          else if (type ().indexOf ("long long") >= 0)
76            ls = ls.mod (twoPow64);
77  
78          value (coerceToTarget (ls));
79        }
80      }
81      catch (ClassCastException e)
82      {
83        String[] parameters = {Util.getMessage ("EvaluationException.left"), left ().value ().getClass ().getName (), right ().value ().getClass ().getName ()};
84        throw new EvaluationException (Util.getMessage ("EvaluationException.1", parameters));
85      }
86      return value ();
87    } // evaluate
88  } // class ShiftLeft