| /* |
| * 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); |
| } |
| } |
| } |
| } |
| } |