1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2005 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.objectweb.asm.tree.analysis;
import org.objectweb.asm.Type;
/**
* A {@link Value} that is represented by its type in a seven types type sytem.
* This type system distinguishes the UNINITIALZED, INT, FLOAT, LONG, DOUBLE,
* REFERENCE and RETURNADDRESS types.
*
* @author Eric Bruneton
*/
public class BasicValue implements Value {
public final static Value UNINITIALIZED_VALUE = new BasicValue(null);
public final static Value INT_VALUE = new BasicValue(Type.INT_TYPE);
public final static Value FLOAT_VALUE = new BasicValue(Type.FLOAT_TYPE);
public final static Value LONG_VALUE = new BasicValue(Type.LONG_TYPE);
public final static Value DOUBLE_VALUE = new BasicValue(Type.DOUBLE_TYPE);
public final static Value REFERENCE_VALUE = new BasicValue(Type.getType("Ljava/lang/Object;"));
public final static Value RETURNADDRESS_VALUE = new BasicValue(null);
private Type type;
public BasicValue(final Type type) {
this.type = type;
}
public Type getType() {
return type;
}
public int getSize() {
return type == Type.LONG_TYPE || type == Type.DOUBLE_TYPE ? 2 : 1;
}
public boolean isReference() {
return type != null
&& (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY);
}
public boolean equals(final Object value) {
if (value == this) {
return true;
} else if (value instanceof BasicValue) {
if (type == null) {
return ((BasicValue) value).type == null;
} else {
return type.equals(((BasicValue) value).type);
}
} else {
return false;
}
}
public int hashCode() {
return type == null ? 0 : type.hashCode();
}
public String toString() {
if (this == UNINITIALIZED_VALUE) {
return ".";
} else if (this == RETURNADDRESS_VALUE) {
return "A";
} else if (this == REFERENCE_VALUE) {
return "R";
} else {
return type.getDescriptor();
}
}
}
|
