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Java > Open Source Codes > gnu > bytecode > CpoolValue2


1 // Copyright (c) 1997 Per M.A. Bothner.
2 // This is free software; for terms and warranty disclaimer see ./COPYING.
3
4 package gnu.bytecode;
5 import java.io.*;
6
7 /** A CONSTANT_Long or CONSTANT_Double entry in the constant pool. */
8
9 public class CpoolValue2 extends CpoolEntry
10 {
11   int tag;
12   long value;
13
14   CpoolValue2 (int tag) { this.tag = tag; }
15
16   CpoolValue2 (ConstantPool cpool, int tag, int hash, long value)
17   {
18     super (cpool, hash);
19     this.tag = tag;
20     this.value = value;
21     cpool.count++; /* Long and Double take an extra cpool slot. */
22   }
23
24   public int getTag() { return tag; }
25
26   public final long getValue()
27   {
28     return value;
29   }
30
31   static int hashCode (long val) { return (int) val; }
32
33   public int hashCode ()
34   {
35     if (hash == 0)
36       hash = hashCode(value);
37     return hash;
38   }
39
40   void write (DataOutputStream dstr) throws java.io.IOException JavaDoc
41   {
42     dstr.writeByte (tag);
43     dstr.writeLong (value);
44   }
45
46   public void print (ClassTypeWriter dst, int verbosity)
47   {
48     if (tag == ConstantPool.LONG)
49       {
50     if (verbosity > 0)
51       dst.print("Long ");
52     dst.print(value);
53     if (verbosity > 1 && value != 0)
54       {
55         dst.print("=0x");
56         dst.print(Long.toHexString(value));
57       }
58       }
59     else // tag == ConstantPool.DOUBLE
60 {
61     if (verbosity > 0)
62       dst.print("Double ");
63     dst.print(Double.longBitsToDouble(value));
64     if (verbosity > 1)
65       {
66         dst.print("=0x");
67         dst.print(Long.toHexString(value));
68       }
69       }
70   }
71 }
72
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