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Diffstat (limited to 'src/de/fernflower/modules/decompiler/stats/DoStatement.java')
| -rw-r--r-- | src/de/fernflower/modules/decompiler/stats/DoStatement.java | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/de/fernflower/modules/decompiler/stats/DoStatement.java b/src/de/fernflower/modules/decompiler/stats/DoStatement.java new file mode 100644 index 0000000..0dfdea2 --- /dev/null +++ b/src/de/fernflower/modules/decompiler/stats/DoStatement.java @@ -0,0 +1,221 @@ +/* + * Fernflower - The Analytical Java Decompiler + * http://www.reversed-java.com + * + * (C) 2008 - 2010, Stiver + * + * This software is NEITHER public domain NOR free software + * as per GNU License. See license.txt for more details. + * + * This software is distributed WITHOUT ANY WARRANTY; without + * even the implied warranty of MERCHANTABILITY or FITNESS FOR + * A PARTICULAR PURPOSE. + */ + +package de.fernflower.modules.decompiler.stats; + +import java.util.ArrayList; +import java.util.List; + +import de.fernflower.main.DecompilerContext; +import de.fernflower.modules.decompiler.ExprProcessor; +import de.fernflower.modules.decompiler.StatEdge; +import de.fernflower.modules.decompiler.exps.Exprent; +import de.fernflower.util.InterpreterUtil; + + +public class DoStatement extends Statement { + + public static final int LOOP_DO = 0; + public static final int LOOP_DOWHILE = 1; + public static final int LOOP_WHILE = 2; + public static final int LOOP_FOR = 3; + + private int looptype; + + private List<Exprent> initExprent = new ArrayList<Exprent>(); + private List<Exprent> conditionExprent = new ArrayList<Exprent>(); + private List<Exprent> incExprent = new ArrayList<Exprent>(); + + // ***************************************************************************** + // constructors + // ***************************************************************************** + + private DoStatement() { + type = Statement.TYPE_DO; + looptype = LOOP_DO; + + initExprent.add(null); + conditionExprent.add(null); + incExprent.add(null); + } + + private DoStatement(Statement head) { + + this(); + + first = head; + stats.addWithKey(first, first.id); + + // post is always null! + } + + // ***************************************************************************** + // public methods + // ***************************************************************************** + + public static Statement isHead(Statement head) { + + if(head.getLastBasicType() == LASTBASICTYPE_GENERAL && !head.isMonitorEnter()) { + + // at most one outgoing edge + StatEdge edge = null; + List<StatEdge> lstSuccs = head.getSuccessorEdges(STATEDGE_DIRECT_ALL); + if(!lstSuccs.isEmpty()) { + edge = lstSuccs.get(0); + } + + // regular loop + if(edge!=null && edge.getType() == StatEdge.TYPE_REGULAR && edge.getDestination() == head) { + return new DoStatement(head); + } + + // continues + if(head.type != TYPE_DO && (edge == null || edge.getType() != StatEdge.TYPE_REGULAR) && + head.getContinueSet().contains(head.getBasichead())) { + return new DoStatement(head); + } + } + + return null; + } + + public String toJava(int indent) { + String indstr = InterpreterUtil.getIndentString(indent); + StringBuffer buf = new StringBuffer(); + + String new_line_separator = DecompilerContext.getNewLineSeparator(); + + buf.append(ExprProcessor.listToJava(varDefinitions, indent)); + + if(isLabeled()) { + buf.append(indstr+"label"+this.id+":" + new_line_separator); + } + + switch(looptype) { + case LOOP_DO: + buf.append(indstr+"while(true) {" + new_line_separator); + buf.append(ExprProcessor.jmpWrapper(first, indent+1, true)); + buf.append(indstr+"}" + new_line_separator); + break; + case LOOP_DOWHILE: + buf.append(indstr+"do {" + new_line_separator); + buf.append(ExprProcessor.jmpWrapper(first, indent+1, true)); + buf.append(indstr+"} while("+conditionExprent.get(0).toJava(indent)+");" + new_line_separator); + break; + case LOOP_WHILE: + buf.append(indstr+"while("+conditionExprent.get(0).toJava(indent)+") {" + new_line_separator); + buf.append(ExprProcessor.jmpWrapper(first, indent+1, true)); + buf.append(indstr+"}" + new_line_separator); + break; + case LOOP_FOR: + buf.append(indstr+"for("+(initExprent.get(0)==null?"":initExprent.get(0).toJava(indent))+ + "; "+conditionExprent.get(0).toJava(indent)+"; "+incExprent.get(0).toJava(indent)+") {" + new_line_separator); + buf.append(ExprProcessor.jmpWrapper(first, indent+1, true)); + buf.append(indstr+"}" + new_line_separator); + } + + return buf.toString(); + } + + public List<Object> getSequentialObjects() { + + List<Object> lst = new ArrayList<Object>(); + + switch(looptype) { + case LOOP_FOR: + if(getInitExprent() != null) { + lst.add(getInitExprent()); + } + case LOOP_WHILE: + lst.add(getConditionExprent()); + } + + lst.add(first); + + switch(looptype) { + case LOOP_DOWHILE: + lst.add(getConditionExprent()); + break; + case LOOP_FOR: + lst.add(getIncExprent()); + } + + return lst; + } + + public void replaceExprent(Exprent oldexpr, Exprent newexpr) { + if(initExprent.get(0) == oldexpr) { + initExprent.set(0, newexpr); + } + if(conditionExprent.get(0) == oldexpr) { + conditionExprent.set(0, newexpr); + } + if(incExprent.get(0) == oldexpr) { + incExprent.set(0, newexpr); + } + } + + public Statement getSimpleCopy() { + return new DoStatement(); + } + + // ***************************************************************************** + // getter and setter methods + // ***************************************************************************** + + public List<Exprent> getInitExprentList() { + return initExprent; + } + + public List<Exprent> getConditionExprentList() { + return conditionExprent; + } + + public List<Exprent> getIncExprentList() { + return incExprent; + } + + public Exprent getConditionExprent() { + return conditionExprent.get(0); + } + + public void setConditionExprent(Exprent conditionExprent) { + this.conditionExprent.set(0, conditionExprent); + } + + public Exprent getIncExprent() { + return incExprent.get(0); + } + + public void setIncExprent(Exprent incExprent) { + this.incExprent.set(0, incExprent); + } + + public Exprent getInitExprent() { + return initExprent.get(0); + } + + public void setInitExprent(Exprent initExprent) { + this.initExprent.set(0, initExprent); + } + + public int getLooptype() { + return looptype; + } + + public void setLooptype(int looptype) { + this.looptype = looptype; + } + +} |