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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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 com.android.dx.rop.code;
import com.android.dx.rop.cst.CstUtf8;
import com.android.dx.util.Hex;
/**
* Information about a source position for code, which includes both a
* line number and original bytecode address.
*/
public final class SourcePosition {
/** {@code non-null;} convenient "no information known" instance */
public static final SourcePosition NO_INFO =
new SourcePosition(null, -1, -1);
/** {@code null-ok;} name of the file of origin or {@code null} if unknown */
private final CstUtf8 sourceFile;
/**
* {@code >= -1;} the bytecode address, or {@code -1} if that
* information is unknown
*/
private final int address;
/**
* {@code >= -1;} the line number, or {@code -1} if that
* information is unknown
*/
private final int line;
/**
* Constructs an instance.
*
* @param sourceFile {@code null-ok;} name of the file of origin or
* {@code null} if unknown
* @param address {@code >= -1;} original bytecode address or {@code -1}
* if unknown
* @param line {@code >= -1;} original line number or {@code -1} if
* unknown
*/
public SourcePosition(CstUtf8 sourceFile, int address, int line) {
if (address < -1) {
throw new IllegalArgumentException("address < -1");
}
if (line < -1) {
throw new IllegalArgumentException("line < -1");
}
this.sourceFile = sourceFile;
this.address = address;
this.line = line;
}
/** {@inheritDoc} */
@Override
public String toString() {
StringBuffer sb = new StringBuffer(50);
if (sourceFile != null) {
sb.append(sourceFile.toHuman());
sb.append(":");
}
if (line >= 0) {
sb.append(line);
}
sb.append('@');
if (address < 0) {
sb.append("????");
} else {
sb.append(Hex.u2(address));
}
return sb.toString();
}
/** {@inheritDoc} */
@Override
public boolean equals(Object other) {
if (!(other instanceof SourcePosition)) {
return false;
}
if (this == other) {
return true;
}
SourcePosition pos = (SourcePosition) other;
return (address == pos.address) && sameLineAndFile(pos);
}
/** {@inheritDoc} */
@Override
public int hashCode() {
return sourceFile.hashCode() + address + line;
}
/**
* Returns whether the lines match between this instance and
* the one given.
*
* @param other {@code non-null;} the instance to compare to
* @return {@code true} iff the lines match
*/
public boolean sameLine(SourcePosition other) {
return (line == other.line);
}
/**
* Returns whether the lines and files match between this instance and
* the one given.
*
* @param other {@code non-null;} the instance to compare to
* @return {@code true} iff the lines and files match
*/
public boolean sameLineAndFile(SourcePosition other) {
return (line == other.line) &&
((sourceFile == other.sourceFile) ||
((sourceFile != null) && sourceFile.equals(other.sourceFile)));
}
/**
* Gets the source file, if known.
*
* @return {@code null-ok;} the source file or {@code null} if unknown
*/
public CstUtf8 getSourceFile() {
return sourceFile;
}
/**
* Gets the original bytecode address.
*
* @return {@code >= -1;} the address or {@code -1} if unknown
*/
public int getAddress() {
return address;
}
/**
* Gets the original line number.
*
* @return {@code >= -1;} the original line number or {@code -1} if
* unknown
*/
public int getLine() {
return line;
}
}
|
