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
169
170
171
172
173
174
175
|
/*
* Copyright 2003-2011 Dave Griffith, Bas Leijdekkers
*
* 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.siyeh.ig.bitwise;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.util.ConstantExpressionUtil;
import com.intellij.psi.util.PsiUtil;
import com.intellij.util.IncorrectOperationException;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.BaseInspection;
import com.siyeh.ig.BaseInspectionVisitor;
import com.siyeh.ig.InspectionGadgetsFix;
import org.jetbrains.annotations.NotNull;
public class ShiftOutOfRangeInspection extends BaseInspection {
@Override
@NotNull
public String getDisplayName() {
return InspectionGadgetsBundle.message(
"shift.operation.by.inappropriate.constant.display.name");
}
@Override
@NotNull
public String buildErrorString(Object... infos) {
final Integer value = (Integer)infos[0];
if (value.intValue() > 0) {
return InspectionGadgetsBundle.message(
"shift.operation.by.inappropriate.constant.problem.descriptor.too.large");
}
else {
return InspectionGadgetsBundle.message(
"shift.operation.by.inappropriate.constant.problem.descriptor.negative");
}
}
@Override
public boolean isEnabledByDefault() {
return true;
}
@Override
protected InspectionGadgetsFix buildFix(Object... infos) {
return new ShiftOutOfRangeFix(((Integer)infos[0]).intValue(),
((Boolean)infos[1]).booleanValue());
}
private static class ShiftOutOfRangeFix extends InspectionGadgetsFix {
private final int value;
private final boolean isLong;
ShiftOutOfRangeFix(int value, boolean isLong) {
this.value = value;
this.isLong = isLong;
}
@Override
@NotNull
public String getName() {
final int newValue;
if (isLong) {
newValue = value & 63;
}
else {
newValue = value & 31;
}
return InspectionGadgetsBundle.message(
"shift.out.of.range.quickfix",
Integer.valueOf(value), Integer.valueOf(newValue));
}
@NotNull
@Override
public String getFamilyName() {
return "Fix shift value";
}
@Override
protected void doFix(Project project, ProblemDescriptor descriptor)
throws IncorrectOperationException {
final PsiElement element = descriptor.getPsiElement();
final PsiElement parent = element.getParent();
if (!(parent instanceof PsiBinaryExpression)) {
return;
}
final PsiBinaryExpression binaryExpression =
(PsiBinaryExpression)parent;
final PsiExpression rhs = binaryExpression.getROperand();
if (rhs == null) {
return;
}
final PsiElementFactory factory =
JavaPsiFacade.getElementFactory(project);
final String text;
final PsiExpression lhs = binaryExpression.getLOperand();
if (PsiType.LONG.equals(lhs.getType())) {
text = String.valueOf(value & 63);
}
else {
text = String.valueOf(value & 31);
}
final PsiExpression newExpression =
factory.createExpressionFromText(
text, element);
rhs.replace(newExpression);
}
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new ShiftOutOfRange();
}
private static class ShiftOutOfRange extends BaseInspectionVisitor {
@Override
public void visitBinaryExpression(
@NotNull PsiBinaryExpression expression) {
super.visitBinaryExpression(expression);
final PsiJavaToken sign = expression.getOperationSign();
final IElementType tokenType = sign.getTokenType();
if (!tokenType.equals(JavaTokenType.LTLT) &&
!tokenType.equals(JavaTokenType.GTGT) &&
!tokenType.equals(JavaTokenType.GTGTGT)) {
return;
}
final PsiType expressionType = expression.getType();
if (expressionType == null) {
return;
}
final PsiExpression rhs = expression.getROperand();
if (rhs == null) {
return;
}
if (!PsiUtil.isConstantExpression(rhs)) {
return;
}
final Integer valueObject =
(Integer)ConstantExpressionUtil.computeCastTo(rhs,
PsiType.INT);
if (valueObject == null) {
return;
}
final int value = valueObject.intValue();
if (expressionType.equals(PsiType.LONG)) {
if (value < 0 || value > 63) {
registerError(sign, valueObject, Boolean.TRUE);
}
}
if (expressionType.equals(PsiType.INT)) {
if (value < 0 || value > 31) {
registerError(sign, valueObject, Boolean.FALSE);
}
}
}
}
}
|
