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Java > Open Source Codes > gov > nasa > jpf > jvm > bytecode > MULTIANEWARRAY


1 //
2 // Copyright (C) 2005 United States Government as represented by the
3 // Administrator of the National Aeronautics and Space Administration
4 // (NASA). All Rights Reserved.
5 //
6 // This software is distributed under the NASA Open Source Agreement
7 // (NOSA), version 1.3. The NOSA has been approved by the Open Source
8 // Initiative. See the file NOSA-1.3-JPF at the top of the distribution
9 // directory tree for the complete NOSA document.
10 //
11 // THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
12 // KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
13 // LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
14 // SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
15 // A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
16 // THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
17 // DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
18 //
19 package gov.nasa.jpf.jvm.bytecode;
20
21 import gov.nasa.jpf.jvm.ElementInfo;
22 import gov.nasa.jpf.jvm.KernelState;
23 import gov.nasa.jpf.jvm.SystemState;
24 import gov.nasa.jpf.jvm.ThreadInfo;
25
26 import org.apache.bcel.classfile.ConstantPool;
27
28
29 /**
30  * Create new multidimensional array
31  * ..., count1, [count2, ...] => ..., arrayref
32  */
33 public class MULTIANEWARRAY extends Instruction {
34   private String JavaDoc type;
35   private int dimensions;
36
37   public void setPeer (org.apache.bcel.generic.Instruction i, ConstantPool cp) {
38     type = cp.constantToString(cp.getConstant(
39                                      ((org.apache.bcel.generic.MULTIANEWARRAY) i).getIndex()));
40     dimensions = ((org.apache.bcel.generic.MULTIANEWARRAY) i).getDimensions();
41   }
42
43   public int allocateArray (String JavaDoc type, int[] dim, ThreadInfo th, int d) {
44     int l = dim[d++];
45     int arrayRef = th.list.ks.da.newArray(type.substring(d), l, th);
46     ElementInfo e = th.list.ks.da.get(arrayRef);
47
48     if (dim.length > d) {
49       for (int i = 0; i < l; i++) {
50         e.setElement(i, allocateArray(type, dim, th, d));
51       }
52     } else {
53       for (int i = 0; i < l; i++) {
54         e.setElement(i, -1);
55       }
56     }
57
58     return arrayRef;
59   }
60
61   public Instruction execute (SystemState ss, KernelState ks, ThreadInfo th) {
62     int[] dim = new int[dimensions];
63
64     for (int i = dimensions - 1; i >= 0; i--) {
65       dim[i] = th.pop();
66     }
67
68     int arrayRef = allocateArray(type, dim, th, 0);
69
70
71     // put the result (the array reference) on the stack
72 th.push(arrayRef, true);
73
74     return getNext(th);
75   }
76
77   public int getByteCode () {
78     return 0xC5;
79   }
80 }
81
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