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 // -D52042<daz> Added protypical code for computing mixed-operand binary
  40 //  expressions, which promotes result to Double only when the target type
  41 //  is floating-point. Code violates spec, but may be usable at some future
  42 //  time.
  43 
  44 import com.sun.tools.corba.se.idl.Util;
  45 import java.math.BigInteger;
  46 
  47 /**
  48  *
  49  **/
  50 public class Divide extends BinaryExpr
  51 {
  52   /**
  53    * Constructor: set operation and operands.
  54    **/
  55   protected Divide (Expression leftOperand, Expression rightOperand)
  56   {
  57     super ("/", leftOperand, rightOperand);
  58   } // ctor
  59 
  60   /**
  61    *
  62    **/
  63   public Object evaluate () throws EvaluationException
  64   {
  65     try
  66     {
  67       Number l = (Number)left ().evaluate ();
  68       Number r = (Number)right ().evaluate ();
  69 
  70       boolean lIsNonInteger = l instanceof Float || l instanceof Double;
  71       boolean rIsNonInteger = r instanceof Float || r instanceof Double;
  72 
  73       if (lIsNonInteger && rIsNonInteger)
  74         value (new Double (l.doubleValue () / r.doubleValue ()));
  75       else if (lIsNonInteger || rIsNonInteger)
  76       {
  77         String[] parameters = {Util.getMessage ("EvaluationException.divide"),
  78             left ().value ().getClass ().getName (),
  79             right ().value ().getClass ().getName ()};
  80         throw new EvaluationException (Util.getMessage ("EvaluationException.1", parameters));
  81       }
  82       else
  83       {
  84         BigInteger tmpL = (BigInteger)l,  tmpR = (BigInteger)r;
  85         value (tmpL.divide (tmpR));
  86       }
  87       // <d52042> Allow evaluation over mixed operands.  Supplant code above.
  88       /*
  89       Number l = (Number)left ().evaluate ();
  90       Number r = (Number)right ().evaluate ();
  91 
  92       boolean lIsNonInteger = l instanceof Float || l instanceof Double;
  93       boolean rIsNonInteger = r instanceof Float || r instanceof Double;
  94 
  95       // Floating-point operands.
  96       if (lIsNonInteger && rIsNonInteger)
  97       {
  98         value (new Double (l.doubleValue () / r.doubleValue ()));
  99       }
 100       // Integral operands.
 101       else if (!(lIsNonInteger || rIsNonInteger))
 102       {
 103         BigInteger tmpL = (BigInteger)l,  tmpR = (BigInteger)r;
 104         value (tmpL.divide (tmpR));
 105       }
 106       // Mixed operands: one operand is floating-point, the other is integral.
 107       else
 108       {
 109         // Legal over floating-point types only.
 110         if (type ().equals ("float") ||
 111             type ().equals ("double"))
 112         {
 113           value (new Double (l.doubleValue () / r.doubleValue ()));
 114         }
 115         else
 116         {
 117           String[] parameters = {Util.getMessage ("EvaluationException.divide"),
 118               left ().value ().getClass ().getName (),
 119               right ().value ().getClass ().getName ()};
 120         throw new EvaluationException (Util.getMessage ("EvaluationException.1", parameters));
 121         }
 122       }
 123       */
 124     }
 125     catch (ClassCastException e)
 126     {
 127       String[] parameters = {Util.getMessage ("EvaluationException.divide"), left ().value ().getClass ().getName (), right ().value ().getClass ().getName ()};
 128       throw new EvaluationException (Util.getMessage ("EvaluationException.1", parameters));
 129     }
 130     return value ();
 131   } // evaluate
 132 } // class Divide