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865 lines
29 KiB
Java
865 lines
29 KiB
Java
/*
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* Copyright 2000-2009 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Created by IntelliJ IDEA.
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* User: max
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* Date: Jan 28, 2002
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* Time: 9:39:36 PM
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* To change template for new class use
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* Code Style | Class Templates options (Tools | IDE Options).
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*/
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package com.intellij.codeInspection.dataFlow;
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import com.intellij.codeInspection.dataFlow.value.*;
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import com.intellij.openapi.progress.ProgressManager;
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import com.intellij.openapi.util.text.StringUtil;
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import com.intellij.psi.*;
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import com.intellij.psi.util.TypeConversionUtil;
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import com.intellij.util.containers.ContainerUtil;
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import com.intellij.util.containers.Stack;
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import gnu.trove.*;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.util.*;
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public class DfaMemoryStateImpl implements DfaMemoryState {
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private final DfaValueFactory myFactory;
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private final List<SortedIntSet> myEqClasses = new ArrayList<SortedIntSet>();
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private final Stack<DfaValue> myStack = new Stack<DfaValue>();
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private TIntStack myOffsetStack = new TIntStack(1);
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private final TLongHashSet myDistinctClasses = new TLongHashSet();
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private final THashMap<DfaVariableValue,DfaVariableState> myVariableStates = new THashMap<DfaVariableValue, DfaVariableState>();
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private final THashSet<DfaVariableValue> myUnknownVariables = new THashSet<DfaVariableValue>();
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public DfaMemoryStateImpl(final DfaValueFactory factory) {
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myFactory = factory;
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}
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public DfaValueFactory getFactory() {
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return myFactory;
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}
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protected DfaMemoryStateImpl createNew() {
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return new DfaMemoryStateImpl(myFactory);
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}
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@Override
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public DfaMemoryStateImpl createCopy() {
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DfaMemoryStateImpl newState = createNew();
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newState.myStack.addAll(myStack);
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newState.myDistinctClasses.addAll(myDistinctClasses.toArray());
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newState.myUnknownVariables.addAll(myUnknownVariables);
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newState.myOffsetStack = new TIntStack(myOffsetStack);
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for (int i = 0; i < myEqClasses.size(); i++) {
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SortedIntSet aClass = myEqClasses.get(i);
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newState.myEqClasses.add(aClass != null ? new SortedIntSet(aClass.toNativeArray()) : null);
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}
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for (DfaVariableValue dfaVariableValue : myVariableStates.keySet()) {
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newState.myVariableStates.put(dfaVariableValue, myVariableStates.get(dfaVariableValue).clone());
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}
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return newState;
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}
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public boolean equals(Object obj) {
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if (obj == this) return true;
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if (!(obj instanceof DfaMemoryStateImpl)) return false;
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DfaMemoryStateImpl that = (DfaMemoryStateImpl)obj;
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if (myDistinctClasses.size() != that.myDistinctClasses.size()) return false;
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if (myStack.size() != that.myStack.size()) return false;
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if (myOffsetStack.size() != that.myOffsetStack.size()) return false;
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if (myVariableStates.size() != that.myVariableStates.size()) return false;
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if (myUnknownVariables.size() != that.myUnknownVariables.size()) return false;
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if (!myStack.equals(that.myStack)) return false;
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if (!myOffsetStack.equals(that.myOffsetStack)) return false;
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if (!myVariableStates.equals(that.myVariableStates)) return false;
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if (!myUnknownVariables.equals(that.myUnknownVariables)) return false;
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if (!getNonTrivialEqClasses().equals(that.getNonTrivialEqClasses())) return false;
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if (!getDistinctClassPairs().equals(that.getDistinctClassPairs())) return false;
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return true;
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}
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private Set<Set<SortedIntSet>> getDistinctClassPairs() {
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Set<Set<SortedIntSet>> result = ContainerUtil.newHashSet();
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for (long encodedPair : myDistinctClasses.toArray()) {
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THashSet<SortedIntSet> pair = new THashSet<SortedIntSet>(2);
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pair.add(myEqClasses.get(low(encodedPair)));
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pair.add(myEqClasses.get(high(encodedPair)));
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result.add(pair);
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}
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return result;
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}
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private Set<SortedIntSet> getNonTrivialEqClasses() {
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Set<SortedIntSet> result = ContainerUtil.newHashSet();
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for (SortedIntSet eqClass : myEqClasses) {
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if (eqClass != null && eqClass.size() > 1) {
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result.add(eqClass);
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}
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}
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return result;
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}
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public int hashCode() {
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return 0;
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//return ((myEqClasses.hashCode() * 31 + myStack.hashCode()) * 31 + myVariableStates.hashCode()) * 31 + myUnknownVariables.hashCode();
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}
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private void appendClass(StringBuilder buf, @Nullable SortedIntSet aClass) {
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if (aClass == null) return;
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buf.append("(");
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for (int i = 0; i < aClass.size(); i++) {
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if (i > 0) buf.append(", ");
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int value = aClass.get(i);
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DfaValue dfaValue = myFactory.getValue(value);
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buf.append(dfaValue);
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}
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buf.append(")");
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}
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@SuppressWarnings({"HardCodedStringLiteral"})
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public String toString() {
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StringBuilder result = new StringBuilder();
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result.append('<');
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for (SortedIntSet set : getNonTrivialEqClasses()) {
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appendClass(result, set);
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}
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if (!myDistinctClasses.isEmpty()) {
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result.append("\n distincts: ");
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List<String> distincts = new ArrayList<String>();
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for (Set<SortedIntSet> pair : getDistinctClassPairs()) {
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ArrayList<SortedIntSet> list = new ArrayList<SortedIntSet>(pair);
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StringBuilder one = new StringBuilder();
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one.append("{");
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appendClass(one, list.get(0));
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one.append(", ");
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appendClass(one, list.get(1));
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one.append("}");
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distincts.add(one.toString());
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}
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Collections.sort(distincts);
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result.append(StringUtil.join(distincts, " "));
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}
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if (!myStack.isEmpty()) {
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result.append("\n stack: ").append(StringUtil.join(myStack, ","));
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}
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if (!myVariableStates.isEmpty()) {
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result.append("\n vars: ");
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for (Map.Entry<DfaVariableValue, DfaVariableState> entry : myVariableStates.entrySet()) {
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result.append("\n[").append(entry.getKey()).append("->").append(entry.getValue()).append("]");
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}
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}
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if (!myUnknownVariables.isEmpty()) {
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result.append("\n unknowns: ").append(new HashSet<DfaVariableValue>(myUnknownVariables));
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}
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result.append('>');
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return result.toString();
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}
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@Override
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public DfaValue pop() {
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return myStack.pop();
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}
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@Override
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public DfaValue peek() {
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return myStack.peek();
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}
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@Override
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public void push(@NotNull DfaValue value) {
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myStack.push(value);
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}
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@Override
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public int popOffset() {
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return myOffsetStack.pop();
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}
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@Override
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public void pushOffset(int offset) {
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myOffsetStack.push(offset);
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}
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@Override
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public void emptyStack() {
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myStack.clear();
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}
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@Override
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public void setVarValue(DfaVariableValue var, DfaValue value) {
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if (var == value) return;
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flushVariable(var);
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DfaVariableState varState = getVariableState(var);
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if (value instanceof DfaUnknownValue) {
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varState.setNullable(false);
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return;
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}
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varState.setValue(value);
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if (value instanceof DfaTypeValue) {
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varState.setNullable(((DfaTypeValue)value).isNullable());
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DfaRelationValue dfaInstanceof = myFactory.getRelationFactory().createRelation(var, value, JavaTokenType.INSTANCEOF_KEYWORD, false);
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if (((DfaTypeValue)value).isNotNull()) {
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applyCondition(dfaInstanceof);
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} else {
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applyInstanceofOrNull(dfaInstanceof);
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}
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}
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else {
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DfaRelationValue dfaEqual = myFactory.getRelationFactory().createRelation(var, value, JavaTokenType.EQEQ, false);
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if (dfaEqual == null) return;
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applyCondition(dfaEqual);
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if (value instanceof DfaVariableValue) {
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myVariableStates.put(var, varState = getVariableState((DfaVariableValue)value).clone());
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}
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else if (value instanceof DfaBoxedValue) {
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varState.setNullable(false);
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applyCondition(compareToNull(var, true));
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}
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}
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if (varState.isNotNull()) {
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applyCondition(compareToNull(var, true));
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}
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}
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@Nullable("for boxed values which can't be compared by ==")
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private Integer getOrCreateEqClassIndex(DfaValue dfaValue) {
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int i = getEqClassIndex(dfaValue);
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if (i != -1) return i;
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if (!canBeReused(dfaValue) && !(((DfaBoxedValue)dfaValue).getWrappedValue() instanceof DfaConstValue)) {
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return null;
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}
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SortedIntSet aClass = new SortedIntSet();
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aClass.add(dfaValue.getID());
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myEqClasses.add(aClass);
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return myEqClasses.size() - 1;
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}
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@NotNull
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private List<DfaValue> getEqClassesFor(@NotNull DfaValue dfaValue) {
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int index = getEqClassIndex(dfaValue);
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SortedIntSet set = index == -1 ? null : myEqClasses.get(index);
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if (set == null) {
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return Collections.emptyList();
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}
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final List<DfaValue> result = new ArrayList<DfaValue>(set.size());
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set.forEach(new TIntProcedure() {
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@Override
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public boolean execute(int c1) {
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DfaValue value = myFactory.getValue(c1);
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result.add(value);
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return true;
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}
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});
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return result;
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}
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private boolean canBeNaN(@NotNull DfaValue dfaValue) {
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for (DfaValue eq : getEqClassesFor(dfaValue)) {
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if (eq instanceof DfaBoxedValue) {
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eq = ((DfaBoxedValue)eq).getWrappedValue();
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}
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if (eq instanceof DfaConstValue && !isNaN(eq)) {
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return false;
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}
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}
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return dfaValue instanceof DfaVariableValue && TypeConversionUtil.isFloatOrDoubleType(((DfaVariableValue)dfaValue).getVariableType());
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}
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private boolean isEffectivelyNaN(@NotNull DfaValue dfaValue) {
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for (DfaValue eqClass : getEqClassesFor(dfaValue)) {
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if (isNaN(eqClass)) return true;
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}
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return false;
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}
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private int getEqClassIndex(@NotNull DfaValue dfaValue) {
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for (int i = 0; i < myEqClasses.size(); i++) {
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SortedIntSet aClass = myEqClasses.get(i);
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if (aClass != null && aClass.contains(dfaValue.getID())) {
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if (!canBeReused(dfaValue) && aClass.size() > 1) return -1;
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return i;
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}
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}
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return -1;
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}
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private boolean canBeReused(final DfaValue dfaValue) {
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if (dfaValue instanceof DfaBoxedValue) {
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DfaValue valueToWrap = ((DfaBoxedValue)dfaValue).getWrappedValue();
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if (valueToWrap instanceof DfaConstValue) {
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return cacheable((DfaConstValue)valueToWrap);
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}
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if (valueToWrap instanceof DfaVariableValue) {
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if (PsiType.BOOLEAN.equals(((DfaVariableValue)valueToWrap).getVariableType())) return true;
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for (DfaValue value : getEqClassesFor(valueToWrap)) {
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if (value instanceof DfaConstValue && cacheable((DfaConstValue)value)) return true;
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}
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}
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return false;
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}
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return true;
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}
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private static boolean cacheable(DfaConstValue dfaConstValue) {
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Object value = dfaConstValue.getValue();
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return box(value) == box(value);
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}
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@SuppressWarnings({"UnnecessaryBoxing"})
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private static Object box(final Object value) {
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Object newBoxedValue;
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if (value instanceof Integer) {
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newBoxedValue = Integer.valueOf(((Integer)value).intValue());
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}
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else if (value instanceof Byte) {
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newBoxedValue = Byte.valueOf(((Byte)value).byteValue());
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}
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else if (value instanceof Short) {
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newBoxedValue = Short.valueOf(((Short)value).shortValue());
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}
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else if (value instanceof Long) {
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newBoxedValue = Long.valueOf(((Long)value).longValue());
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}
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else if (value instanceof Boolean) {
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newBoxedValue = Boolean.valueOf(((Boolean)value).booleanValue());
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}
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else if (value instanceof Character) {
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newBoxedValue = Character.valueOf(((Character)value).charValue());
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}
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else {
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return new Object();
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}
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return newBoxedValue;
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}
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private boolean uniteClasses(int c1Index, int c2Index) {
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SortedIntSet c1 = myEqClasses.get(c1Index);
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SortedIntSet c2 = myEqClasses.get(c2Index);
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Set<DfaVariableValue> vars = ContainerUtil.newTroveSet();
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Set<DfaVariableValue> negatedVars = ContainerUtil.newTroveSet();
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int[] cs = new int[c1.size() + c2.size()];
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c1.set(0, cs, 0, c1.size());
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c2.set(0, cs, c1.size(), c2.size());
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int nConst = 0;
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for (int c : cs) {
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DfaValue dfaValue = myFactory.getValue(c);
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if (dfaValue instanceof DfaBoxedValue) dfaValue = ((DfaBoxedValue)dfaValue).getWrappedValue();
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if (dfaValue instanceof DfaUnboxedValue) dfaValue = ((DfaUnboxedValue)dfaValue).getVariable();
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if (dfaValue instanceof DfaConstValue) nConst++;
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if (dfaValue instanceof DfaVariableValue) {
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DfaVariableValue variableValue = (DfaVariableValue)dfaValue;
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if (variableValue.isNegated()) {
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negatedVars.add(variableValue.createNegated());
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} else {
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vars.add(variableValue);
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}
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}
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if (nConst > 1) return false;
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}
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if (ContainerUtil.intersects(vars, negatedVars)) return false;
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TLongArrayList c2Pairs = new TLongArrayList();
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long[] distincts = myDistinctClasses.toArray();
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for (long distinct : distincts) {
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int pc1 = low(distinct);
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int pc2 = high(distinct);
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boolean addedToC1 = false;
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if (pc1 == c1Index || pc2 == c1Index) {
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addedToC1 = true;
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}
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if (pc1 == c2Index || pc2 == c2Index) {
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if (addedToC1) return false;
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c2Pairs.add(distinct);
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}
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}
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for (int i = 0; i < c2.size(); i++) {
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int c = c2.get(i);
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c1.add(c);
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}
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for (int i = 0; i < c2Pairs.size(); i++) {
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long c = c2Pairs.get(i);
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myDistinctClasses.remove(c);
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myDistinctClasses.add(createPair(c1Index, low(c) == c2Index ? high(c) : low(c)));
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}
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myEqClasses.set(c2Index, null);
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return true;
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}
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private static int low(long l) {
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return (int)l;
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}
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private static int high(long l) {
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return (int)((l & 0xFFFFFFFF00000000L) >> 32);
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}
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private static long createPair(int i1, int i2) {
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if (i1 < i2) {
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long l = i1;
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l <<= 32;
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l += i2;
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return l;
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}
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else {
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long l = i2;
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l <<= 32;
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l += i1;
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return l;
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}
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}
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private void makeClassesDistinct(int c1Index, int c2Index) {
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myDistinctClasses.add(createPair(c1Index, c2Index));
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}
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@Override
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public boolean isNull(DfaValue dfaValue) {
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if (dfaValue instanceof DfaTypeValue && ((DfaTypeValue)dfaValue).isNotNull()) return false;
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if (dfaValue instanceof DfaConstValue) return ((DfaConstValue)dfaValue).getConstant() == null;
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if (dfaValue instanceof DfaVariableValue) {
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int c1Index = getEqClassIndex(dfaValue);
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return c1Index >= 0 && c1Index == getEqClassIndex(myFactory.getConstFactory().getNull());
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}
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return false;
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}
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@Override
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public boolean isNotNull(DfaVariableValue dfaVar) {
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if (getVariableState(dfaVar).isNotNull()) {
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return true;
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}
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DfaConstValue dfaNull = myFactory.getConstFactory().getNull();
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int c1Index = getEqClassIndex(dfaVar);
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int c2Index = getEqClassIndex(dfaNull);
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if (c1Index < 0 || c2Index < 0) {
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return false;
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}
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long[] pairs = myDistinctClasses.toArray();
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for (long pair : pairs) {
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if (c1Index == low(pair) && c2Index == high(pair) ||
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c1Index == high(pair) && c2Index == low(pair)) {
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return true;
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}
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}
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return false;
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}
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@Override
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@Nullable
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public DfaConstValue getConstantValue(DfaVariableValue value) {
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DfaConstValue result = null;
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for (DfaValue equal : getEqClassesFor(value)) {
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if (equal instanceof DfaVariableValue) continue;
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DfaConstValue constValue = asConstantValue(equal);
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if (constValue == null) return null;
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result = constValue;
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}
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return result;
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}
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@Override
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public boolean applyInstanceofOrNull(DfaRelationValue dfaCond) {
|
|
DfaValue left = dfaCond.getLeftOperand();
|
|
if (left instanceof DfaBoxedValue) {
|
|
left = ((DfaBoxedValue)left).getWrappedValue();
|
|
}
|
|
else if (left instanceof DfaUnboxedValue) {
|
|
left = ((DfaUnboxedValue)left).getVariable();
|
|
}
|
|
|
|
if (!(left instanceof DfaVariableValue)) return true;
|
|
|
|
DfaVariableValue dfaVar = (DfaVariableValue)left;
|
|
DfaTypeValue dfaType = (DfaTypeValue)dfaCond.getRightOperand();
|
|
|
|
return isNull(dfaVar) || getVariableState(dfaVar).setInstanceofValue(dfaType);
|
|
}
|
|
|
|
@Override
|
|
public boolean applyCondition(DfaValue dfaCond) {
|
|
if (dfaCond instanceof DfaUnknownValue) return true;
|
|
if (dfaCond instanceof DfaUnboxedValue) {
|
|
DfaVariableValue dfaVar = ((DfaUnboxedValue)dfaCond).getVariable();
|
|
boolean isNegated = dfaVar.isNegated();
|
|
DfaVariableValue dfaNormalVar = isNegated ? dfaVar.createNegated() : dfaVar;
|
|
final DfaValue boxedTrue = myFactory.getBoxedFactory().createBoxed(myFactory.getConstFactory().getTrue());
|
|
return applyRelationCondition(myFactory.getRelationFactory().createRelation(dfaNormalVar, boxedTrue, JavaTokenType.EQEQ, isNegated));
|
|
}
|
|
if (dfaCond instanceof DfaVariableValue) {
|
|
DfaVariableValue dfaVar = (DfaVariableValue)dfaCond;
|
|
boolean isNegated = dfaVar.isNegated();
|
|
DfaVariableValue dfaNormalVar = isNegated ? dfaVar.createNegated() : dfaVar;
|
|
DfaConstValue dfaTrue = myFactory.getConstFactory().getTrue();
|
|
return applyRelationCondition(myFactory.getRelationFactory().createRelation(dfaNormalVar, dfaTrue, JavaTokenType.EQEQ, isNegated));
|
|
}
|
|
|
|
if (dfaCond instanceof DfaConstValue) {
|
|
return dfaCond == myFactory.getConstFactory().getTrue() || dfaCond != myFactory.getConstFactory().getFalse();
|
|
}
|
|
|
|
if (!(dfaCond instanceof DfaRelationValue)) return true;
|
|
|
|
return applyRelationCondition((DfaRelationValue)dfaCond);
|
|
}
|
|
|
|
private boolean applyRelationCondition(DfaRelationValue dfaRelation) {
|
|
DfaValue dfaLeft = dfaRelation.getLeftOperand();
|
|
DfaValue dfaRight = dfaRelation.getRightOperand();
|
|
if (dfaLeft instanceof DfaUnknownValue || dfaRight instanceof DfaUnknownValue) return true;
|
|
|
|
boolean isNegated = dfaRelation.isNegated();
|
|
if (dfaLeft instanceof DfaTypeValue && ((DfaTypeValue)dfaLeft).isNotNull() && dfaRight == myFactory.getConstFactory().getNull()) {
|
|
return isNegated;
|
|
}
|
|
|
|
if (dfaRight instanceof DfaTypeValue) {
|
|
if (dfaLeft instanceof DfaVariableValue) {
|
|
DfaVariableState varState = getVariableState((DfaVariableValue)dfaLeft);
|
|
DfaVariableValue dfaVar = (DfaVariableValue)dfaLeft;
|
|
if (isNegated) {
|
|
return varState.addNotInstanceofValue((DfaTypeValue)dfaRight) || applyCondition(compareToNull(dfaVar, false));
|
|
}
|
|
return applyCondition(compareToNull(dfaVar, true)) && varState.setInstanceofValue((DfaTypeValue)dfaRight);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (isNull(dfaRight) && compareVariableWithNull(dfaLeft) || isNull(dfaLeft) && compareVariableWithNull(dfaRight)) {
|
|
return isNegated;
|
|
}
|
|
|
|
if (isEffectivelyNaN(dfaLeft) || isEffectivelyNaN(dfaRight)) {
|
|
applyEquivalenceRelation(dfaRelation, dfaLeft, dfaRight);
|
|
return isNegated;
|
|
}
|
|
if (canBeNaN(dfaLeft) || canBeNaN(dfaRight)) {
|
|
applyEquivalenceRelation(dfaRelation, dfaLeft, dfaRight);
|
|
return true;
|
|
}
|
|
|
|
return applyEquivalenceRelation(dfaRelation, dfaLeft, dfaRight);
|
|
}
|
|
|
|
private boolean compareVariableWithNull(DfaValue val) {
|
|
if (val instanceof DfaVariableValue) {
|
|
DfaVariableValue dfaVar = (DfaVariableValue)val;
|
|
if (isNotNull(dfaVar)) {
|
|
return true;
|
|
}
|
|
getVariableState(dfaVar).setNullable(true);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private boolean applyEquivalenceRelation(DfaRelationValue dfaRelation, DfaValue dfaLeft, DfaValue dfaRight) {
|
|
boolean isNegated = dfaRelation.isNonEquality();
|
|
if (!isNegated && !dfaRelation.isEquality()) {
|
|
return true;
|
|
}
|
|
if (!applyRelation(dfaLeft, dfaRight, isNegated)) {
|
|
return false;
|
|
}
|
|
if (!checkCompareWithBooleanLiteral(dfaLeft, dfaRight, isNegated)) {
|
|
return false;
|
|
}
|
|
if (dfaLeft instanceof DfaVariableValue) {
|
|
if (!applyUnboxedRelation((DfaVariableValue)dfaLeft, dfaRight, isNegated)) {
|
|
return false;
|
|
}
|
|
if (!applyBoxedRelation((DfaVariableValue)dfaLeft, dfaRight, isNegated)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private boolean applyBoxedRelation(DfaVariableValue dfaLeft, DfaValue dfaRight, boolean negated) {
|
|
if (!TypeConversionUtil.isPrimitiveAndNotNull(dfaLeft.getVariableType())) return true;
|
|
|
|
DfaBoxedValue.Factory boxedFactory = myFactory.getBoxedFactory();
|
|
DfaValue boxedLeft = boxedFactory.createBoxed(dfaLeft);
|
|
DfaValue boxedRight = boxedFactory.createBoxed(dfaRight);
|
|
return boxedLeft == null || boxedRight == null || applyRelation(boxedLeft, boxedRight, negated);
|
|
}
|
|
|
|
private boolean applyUnboxedRelation(DfaVariableValue dfaLeft, DfaValue dfaRight, boolean negated) {
|
|
PsiType type = dfaLeft.getVariableType();
|
|
if (!TypeConversionUtil.isPrimitiveWrapper(type)) {
|
|
return true;
|
|
}
|
|
if (negated && !isMaybeBoxedConstant(dfaRight)) {
|
|
// from the fact (wrappers are not the same) does not follow (unboxed values are not equals)
|
|
return true;
|
|
}
|
|
|
|
DfaBoxedValue.Factory boxedFactory = myFactory.getBoxedFactory();
|
|
return applyRelation(boxedFactory.createUnboxed(dfaLeft), boxedFactory.createUnboxed(dfaRight), negated);
|
|
}
|
|
|
|
private static boolean isMaybeBoxedConstant(DfaValue val) {
|
|
return val instanceof DfaConstValue ||
|
|
val instanceof DfaBoxedValue && ((DfaBoxedValue)val).getWrappedValue() instanceof DfaConstValue;
|
|
}
|
|
|
|
private boolean checkCompareWithBooleanLiteral(DfaValue dfaLeft, DfaValue dfaRight, boolean negated) {
|
|
if (dfaRight instanceof DfaConstValue) {
|
|
Object constVal = ((DfaConstValue)dfaRight).getValue();
|
|
if (constVal instanceof Boolean) {
|
|
DfaConstValue negVal = myFactory.getConstFactory().createFromValue(!((Boolean)constVal).booleanValue(), PsiType.BOOLEAN, null);
|
|
if (!applyRelation(dfaLeft, negVal, !negated)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static boolean isNaN(final DfaValue dfa) {
|
|
if (dfa instanceof DfaConstValue) {
|
|
Object value = ((DfaConstValue)dfa).getValue();
|
|
if (value instanceof Double && ((Double)value).isNaN()) return true;
|
|
if (value instanceof Float && ((Float)value).isNaN()) return true;
|
|
}
|
|
else if (dfa instanceof DfaBoxedValue){
|
|
return isNaN(((DfaBoxedValue)dfa).getWrappedValue());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private boolean applyRelation(@NotNull final DfaValue dfaLeft, @NotNull final DfaValue dfaRight, boolean isNegated) {
|
|
if (isUnknownState(dfaLeft) || isUnknownState(dfaRight)) {
|
|
return true;
|
|
}
|
|
|
|
// DfaConstValue || DfaVariableValue
|
|
Integer c1Index = getOrCreateEqClassIndex(dfaLeft);
|
|
Integer c2Index = getOrCreateEqClassIndex(dfaRight);
|
|
if (c1Index == null || c2Index == null) {
|
|
return true;
|
|
}
|
|
|
|
if (!isNegated) { //Equals
|
|
if (c1Index.equals(c2Index)) return true;
|
|
if (!uniteClasses(c1Index, c2Index)) return false;
|
|
}
|
|
else { // Not Equals
|
|
if (c1Index.equals(c2Index)) return false;
|
|
makeClassesDistinct(c1Index, c2Index);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private boolean isUnknownState(DfaValue val) {
|
|
if (val instanceof DfaBoxedValue) return isUnknownState(((DfaBoxedValue)val).getWrappedValue());
|
|
if (val instanceof DfaUnboxedValue) return isUnknownState(((DfaUnboxedValue)val).getVariable());
|
|
if (val instanceof DfaVariableValue) {
|
|
if (myUnknownVariables.contains(val)) return true;
|
|
DfaVariableValue negatedValue = ((DfaVariableValue)val).getNegatedValue();
|
|
if (negatedValue != null && myUnknownVariables.contains(negatedValue)) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public boolean checkNotNullable(DfaValue value) {
|
|
if (value == myFactory.getConstFactory().getNull()) return false;
|
|
if (value instanceof DfaTypeValue && ((DfaTypeValue)value).isNullable()) return false;
|
|
|
|
if (value instanceof DfaVariableValue) {
|
|
DfaVariableValue varValue = (DfaVariableValue)value;
|
|
if (varValue.getVariableType() instanceof PsiPrimitiveType) return true;
|
|
if (isNotNull(varValue)) return true;
|
|
if (getVariableState(varValue).isNullable()) return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@Nullable
|
|
private DfaRelationValue compareToNull(DfaValue dfaVar, boolean negated) {
|
|
DfaConstValue dfaNull = myFactory.getConstFactory().getNull();
|
|
return myFactory.getRelationFactory().createRelation(dfaVar, dfaNull, JavaTokenType.EQEQ, negated);
|
|
}
|
|
|
|
public DfaVariableState getVariableState(DfaVariableValue dfaVar) {
|
|
DfaVariableState state = myVariableStates.get(dfaVar);
|
|
|
|
if (state == null) {
|
|
state = createVariableState(dfaVar);
|
|
if (isUnknownState(dfaVar)) {
|
|
state.setNullable(false);
|
|
return state;
|
|
}
|
|
|
|
myVariableStates.put(dfaVar, state);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
protected Map<DfaVariableValue, DfaVariableState> getVariableStates() {
|
|
return myVariableStates;
|
|
}
|
|
|
|
protected DfaVariableState createVariableState(final DfaVariableValue var) {
|
|
return new DfaVariableState(var);
|
|
}
|
|
|
|
@Override
|
|
public void flushFields(DfaVariableValue[] fields) {
|
|
Set<DfaVariableValue> allVars = new HashSet<DfaVariableValue>(myVariableStates.keySet());
|
|
Collections.addAll(allVars, fields);
|
|
|
|
Set<DfaVariableValue> dependencies = new HashSet<DfaVariableValue>();
|
|
for (DfaVariableValue variableValue : allVars) {
|
|
dependencies.addAll(myFactory.getVarFactory().getAllQualifiedBy(variableValue));
|
|
}
|
|
allVars.addAll(dependencies);
|
|
|
|
for (DfaVariableValue value : allVars) {
|
|
if (myVariableStates.containsKey(value) || getEqClassIndex(value) >= 0) {
|
|
if (value.isFlushableByCalls()) {
|
|
doFlush(value);
|
|
myUnknownVariables.add(value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void flushVariable(@NotNull DfaVariableValue variable) {
|
|
doFlush(variable);
|
|
flushDependencies(variable);
|
|
myUnknownVariables.remove(variable);
|
|
myUnknownVariables.removeAll(myFactory.getVarFactory().getAllQualifiedBy(variable));
|
|
}
|
|
|
|
public void flushDependencies(DfaVariableValue variable) {
|
|
for (DfaVariableValue dependent : myFactory.getVarFactory().getAllQualifiedBy(variable)) {
|
|
doFlush(dependent);
|
|
}
|
|
}
|
|
|
|
private void doFlush(DfaVariableValue varPlain) {
|
|
DfaVariableValue varNegated = varPlain.getNegatedValue();
|
|
|
|
final int idPlain = varPlain.getID();
|
|
final int idNegated = varNegated == null ? -1 : varNegated.getID();
|
|
|
|
int size = myEqClasses.size();
|
|
int interruptCount = 0;
|
|
for (int varClassIndex = 0; varClassIndex < size; varClassIndex++) {
|
|
final SortedIntSet varClass = myEqClasses.get(varClassIndex);
|
|
if (varClass == null) continue;
|
|
|
|
for (int i = 0; i < varClass.size(); i++) {
|
|
if ((++interruptCount & 0xf) == 0) {
|
|
ProgressManager.checkCanceled();
|
|
}
|
|
int cl = varClass.get(i);
|
|
DfaValue value = myFactory.getValue(cl);
|
|
if (mine(idPlain, value) || idNegated >= 0 && mine(idNegated, value)) {
|
|
varClass.remove(i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (varClass.isEmpty()) {
|
|
myEqClasses.set(varClassIndex, null);
|
|
long[] pairs = myDistinctClasses.toArray();
|
|
for (long pair : pairs) {
|
|
if (low(pair) == varClassIndex || high(pair) == varClassIndex) {
|
|
myDistinctClasses.remove(pair);
|
|
}
|
|
}
|
|
}
|
|
else if (containsConstantsOnly(varClassIndex)) {
|
|
for (long pair : myDistinctClasses.toArray()) {
|
|
if (low(pair) == varClassIndex && containsConstantsOnly(high(pair)) ||
|
|
high(pair) == varClassIndex && containsConstantsOnly(low(pair))) {
|
|
myDistinctClasses.remove(pair);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
myVariableStates.remove(varPlain);
|
|
if (varNegated != null) {
|
|
myVariableStates.remove(varNegated);
|
|
}
|
|
}
|
|
|
|
@Nullable private static DfaConstValue asConstantValue(DfaValue value) {
|
|
if (value instanceof DfaConstValue) return (DfaConstValue)value;
|
|
if (value instanceof DfaBoxedValue && ((DfaBoxedValue)value).getWrappedValue() instanceof DfaConstValue) return (DfaConstValue)((DfaBoxedValue)value).getWrappedValue();
|
|
return null;
|
|
}
|
|
|
|
private boolean containsConstantsOnly(int id) {
|
|
SortedIntSet varClass = myEqClasses.get(id);
|
|
for (int i = 0; i < varClass.size(); i++) {
|
|
if (asConstantValue(myFactory.getValue(varClass.get(i))) == null) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private static boolean mine(int id, DfaValue value) {
|
|
return value != null && id == value.getID() ||
|
|
value instanceof DfaBoxedValue && ((DfaBoxedValue)value).getWrappedValue().getID() == id ||
|
|
value instanceof DfaUnboxedValue && ((DfaUnboxedValue)value).getVariable().getID() == id;
|
|
}
|
|
}
|