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
|
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.attribute.preverification;
import proguard.classfile.*;
import proguard.classfile.attribute.CodeAttribute;
import proguard.classfile.attribute.preverification.visitor.StackMapFrameVisitor;
/**
* This StackMapFrame represents an "chop frame".
*
* @author Eric Lafortune
*/
public class LessZeroFrame extends StackMapFrame
{
public int choppedVariablesCount;
/**
* Creates an uninitialized LessZeroFrame.
*/
public LessZeroFrame()
{
}
/**
* Creates a LessZeroFrame with the given tag.
*/
public LessZeroFrame(int tag)
{
choppedVariablesCount = LESS_ZERO_FRAME + 3 - tag;
}
/**
* Creates a LessZeroFrame with the given number of chopped variables.
*/
public LessZeroFrame(byte choppedVariablesCount)
{
this.choppedVariablesCount = (int)choppedVariablesCount;
}
// Implementations for StackMapFrame.
public int getTag()
{
return LESS_ZERO_FRAME + 3 - choppedVariablesCount;
}
public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, StackMapFrameVisitor stackMapFrameVisitor)
{
stackMapFrameVisitor.visitLessZeroFrame(clazz, method, codeAttribute, offset, this);
}
// Implementations for Object.
public boolean equals(Object object)
{
if (!super.equals(object))
{
return false;
}
LessZeroFrame other = (LessZeroFrame)object;
return this.u2offsetDelta == other.u2offsetDelta &&
this.choppedVariablesCount != other.choppedVariablesCount;
}
public int hashCode()
{
return super.hashCode() ^ choppedVariablesCount;
}
public String toString()
{
return super.toString()+"Var: (chopped "+choppedVariablesCount+"), Stack: (empty)";
}
}
|
