blob: d77f3b4f4edeec8866aef11a3fa77981d854aa07 (
plain)
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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.java.decompiler.code;
import java.io.DataOutputStream;
import java.io.IOException;
public class Instruction implements CodeConstants {
// *****************************************************************************
// public fields
// *****************************************************************************
public int opcode;
public int group = CodeConstants.GROUP_GENERAL;
public boolean wide = false;
public int bytecode_version = BYTECODE_JAVA_LE_4;
// *****************************************************************************
// private fields
// *****************************************************************************
private int[] operands = null;
// *****************************************************************************
// public methods
// *****************************************************************************
public Instruction() {
}
public int length() {
return 1;
}
public int operandsCount() {
return (operands == null) ? 0 : operands.length;
}
public int getOperand(int index) {
return operands[index];
}
public Instruction clone() {
return ConstantsUtil.getInstructionInstance(opcode, wide, group, bytecode_version, operands == null ? null : operands.clone());
}
public String toString() {
String res = wide ? "@wide " : "";
res += "@" + ConstantsUtil.getName(opcode);
int len = operandsCount();
for (int i = 0; i < len; i++) {
int op = operands[i];
if (op < 0) {
res += " -" + Integer.toHexString(-op);
}
else {
res += " " + Integer.toHexString(op);
}
}
return res;
}
public boolean canFallthrough() {
return opcode != opc_goto && opcode != opc_goto_w && opcode != opc_ret &&
!(opcode >= opc_ireturn && opcode <= opc_return) && opcode != opc_athrow
&& opcode != opc_jsr && opcode != opc_tableswitch && opcode != opc_lookupswitch;
}
public boolean equalsInstruction(Instruction instr) {
if (opcode != instr.opcode || wide != instr.wide
|| operandsCount() != instr.operandsCount()) {
return false;
}
if (operands != null) {
for (int i = 0; i < operands.length; i++) {
if (operands[i] != instr.getOperand(i)) {
return false;
}
}
}
return true;
}
// should be overwritten by subclasses
public void initInstruction(InstructionSequence seq) {
}
// should be overwritten by subclasses
public void writeToStream(DataOutputStream out, int offset) throws IOException {
out.writeByte(opcode);
}
// *****************************************************************************
// getter and setter methods
// *****************************************************************************
public int[] getOperands() {
return operands;
}
public void setOperands(int[] operands) {
this.operands = operands;
}
}
|
