| /* |
| * Copyright 2003-2005 Dave Griffith |
| * |
| * 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.ipp.shift; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| |
| class MultiplyByPowerOfTwoPredicate implements PsiElementPredicate { |
| |
| public boolean satisfiedBy(PsiElement element) { |
| if (element instanceof PsiBinaryExpression) { |
| final PsiBinaryExpression expression = (PsiBinaryExpression)element; |
| return binaryExpressionIsMultiplyByPowerOfTwo(expression); |
| } |
| else if (element instanceof PsiAssignmentExpression) { |
| final PsiAssignmentExpression expression = |
| (PsiAssignmentExpression)element; |
| return assignmentExpressionIsMultiplyByPowerOfTwo(expression); |
| } |
| else { |
| return false; |
| } |
| } |
| |
| private static boolean assignmentExpressionIsMultiplyByPowerOfTwo( |
| PsiAssignmentExpression expression) { |
| final IElementType tokenType = expression.getOperationTokenType(); |
| if (!tokenType.equals(JavaTokenType.ASTERISKEQ) && |
| !tokenType.equals(JavaTokenType.DIVEQ)) { |
| return false; |
| } |
| final PsiExpression lhs = expression.getLExpression(); |
| final PsiType lhsType = lhs.getType(); |
| if (lhsType == null) { |
| return false; |
| } |
| if (!ShiftUtils.isIntegral(lhsType)) { |
| return false; |
| } |
| final PsiExpression rhs = expression.getRExpression(); |
| if (rhs == null) { |
| return false; |
| } |
| return ShiftUtils.isPowerOfTwo(rhs); |
| } |
| |
| private static boolean binaryExpressionIsMultiplyByPowerOfTwo( |
| PsiBinaryExpression expression) { |
| final IElementType tokenType = expression.getOperationTokenType(); |
| if (!tokenType.equals(JavaTokenType.ASTERISK) && |
| !tokenType.equals(JavaTokenType.DIV)) { |
| return false; |
| } |
| final PsiExpression lhs = expression.getLOperand(); |
| final PsiType lhsType = lhs.getType(); |
| if (lhsType == null) { |
| return false; |
| } |
| if (!ShiftUtils.isIntegral(lhsType)) { |
| return false; |
| } |
| final PsiExpression rhs = expression.getROperand(); |
| if (rhs == null) { |
| return false; |
| } |
| return ShiftUtils.isPowerOfTwo(rhs); |
| } |
| } |