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222 lines
6.6 KiB
222 lines
6.6 KiB
// Copyright 2000-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
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package org.jetbrains.java.decompiler.modules.decompiler.stats;
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import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
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import org.jetbrains.java.decompiler.modules.decompiler.ExprProcessor;
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import org.jetbrains.java.decompiler.modules.decompiler.StatEdge;
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import org.jetbrains.java.decompiler.modules.decompiler.exps.Exprent;
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import org.jetbrains.java.decompiler.util.TextBuffer;
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import java.util.ArrayList;
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import java.util.List;
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public final class DoStatement extends Statement {
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public static final int LOOP_DO = 0;
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public static final int LOOP_DOWHILE = 1;
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public static final int LOOP_WHILE = 2;
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public static final int LOOP_FOR = 3;
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private int looptype;
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private final List<Exprent> initExprent = new ArrayList<>();
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private final List<Exprent> conditionExprent = new ArrayList<>();
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private final List<Exprent> incExprent = new ArrayList<>();
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// *****************************************************************************
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// constructors
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// *****************************************************************************
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private DoStatement() {
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type = Statement.TYPE_DO;
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looptype = LOOP_DO;
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initExprent.add(null);
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conditionExprent.add(null);
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incExprent.add(null);
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}
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private DoStatement(Statement head) {
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this();
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first = head;
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stats.addWithKey(first, first.id);
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// post is always null!
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}
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// *****************************************************************************
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// public methods
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// *****************************************************************************
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public static Statement isHead(Statement head) {
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if (head.getLastBasicType() == LASTBASICTYPE_GENERAL && !head.isMonitorEnter()) {
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// at most one outgoing edge
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StatEdge edge = null;
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List<StatEdge> lstSuccs = head.getSuccessorEdges(STATEDGE_DIRECT_ALL);
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if (!lstSuccs.isEmpty()) {
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edge = lstSuccs.get(0);
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}
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// regular loop
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if (edge != null && edge.getType() == StatEdge.TYPE_REGULAR && edge.getDestination() == head) {
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return new DoStatement(head);
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}
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// continues
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if (head.type != TYPE_DO && (edge == null || edge.getType() != StatEdge.TYPE_REGULAR) &&
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head.getContinueSet().contains(head.getBasichead())) {
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return new DoStatement(head);
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}
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}
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return null;
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}
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@Override
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public TextBuffer toJava(int indent, BytecodeMappingTracer tracer) {
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TextBuffer buf = new TextBuffer();
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buf.append(ExprProcessor.listToJava(varDefinitions, indent, tracer));
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if (isLabeled()) {
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buf.appendIndent(indent).append("label").append(this.id.toString()).append(":").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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}
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switch (looptype) {
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case LOOP_DO:
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buf.appendIndent(indent).append("while(true) {").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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buf.append(ExprProcessor.jmpWrapper(first, indent + 1, false, tracer));
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buf.appendIndent(indent).append("}").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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break;
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case LOOP_DOWHILE:
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buf.appendIndent(indent).append("do {").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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buf.append(ExprProcessor.jmpWrapper(first, indent + 1, false, tracer));
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buf.appendIndent(indent).append("} while(").append(conditionExprent.get(0).toJava(indent, tracer)).append(");").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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break;
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case LOOP_WHILE:
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buf.appendIndent(indent).append("while(").append(conditionExprent.get(0).toJava(indent, tracer)).append(") {").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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buf.append(ExprProcessor.jmpWrapper(first, indent + 1, false, tracer));
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buf.appendIndent(indent).append("}").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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break;
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case LOOP_FOR:
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buf.appendIndent(indent).append("for(");
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if (initExprent.get(0) != null) {
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buf.append(initExprent.get(0).toJava(indent, tracer));
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}
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buf.append("; ")
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.append(conditionExprent.get(0).toJava(indent, tracer)).append("; ").append(incExprent.get(0).toJava(indent, tracer)).append(") {")
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.appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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buf.append(ExprProcessor.jmpWrapper(first, indent + 1, false, tracer));
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buf.appendIndent(indent).append("}").appendLineSeparator();
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tracer.incrementCurrentSourceLine();
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}
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return buf;
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}
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@Override
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public List<Object> getSequentialObjects() {
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List<Object> lst = new ArrayList<>();
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switch (looptype) {
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case LOOP_FOR:
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if (getInitExprent() != null) {
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lst.add(getInitExprent());
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}
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case LOOP_WHILE:
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lst.add(getConditionExprent());
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}
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lst.add(first);
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switch (looptype) {
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case LOOP_DOWHILE:
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lst.add(getConditionExprent());
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break;
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case LOOP_FOR:
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lst.add(getIncExprent());
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}
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return lst;
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}
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@Override
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public void replaceExprent(Exprent oldexpr, Exprent newexpr) {
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if (initExprent.get(0) == oldexpr) {
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initExprent.set(0, newexpr);
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}
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if (conditionExprent.get(0) == oldexpr) {
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conditionExprent.set(0, newexpr);
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}
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if (incExprent.get(0) == oldexpr) {
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incExprent.set(0, newexpr);
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}
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}
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@Override
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public Statement getSimpleCopy() {
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return new DoStatement();
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}
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// *****************************************************************************
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// getter and setter methods
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// *****************************************************************************
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public List<Exprent> getInitExprentList() {
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return initExprent;
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}
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public List<Exprent> getConditionExprentList() {
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return conditionExprent;
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}
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public List<Exprent> getIncExprentList() {
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return incExprent;
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}
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public Exprent getConditionExprent() {
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return conditionExprent.get(0);
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}
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public void setConditionExprent(Exprent conditionExprent) {
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this.conditionExprent.set(0, conditionExprent);
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}
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public Exprent getIncExprent() {
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return incExprent.get(0);
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}
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public void setIncExprent(Exprent incExprent) {
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this.incExprent.set(0, incExprent);
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}
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public Exprent getInitExprent() {
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return initExprent.get(0);
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}
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public void setInitExprent(Exprent initExprent) {
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this.initExprent.set(0, initExprent);
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}
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public int getLooptype() {
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return looptype;
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}
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public void setLooptype(int looptype) {
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this.looptype = looptype;
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}
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}
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