net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/BranchStatement.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.codegen.*;
  14 import net.sourceforge.phpdt.internal.compiler.lookup.*;
  15
  16 public abstract class BranchStatement extends Statement {
  17         public char[] label;
  18         public Label targetLabel;
  19         public AstNode[] subroutines;
  20 /**
  21  * BranchStatement constructor comment.
  22  */
  23 public BranchStatement(char[] l, int s,int e) {
  24         label = l ;
  25         sourceStart = s;
  26         sourceEnd = e;
  27 }
  28 /**
  29  * Branch code generation
  30  *
  31  *   generate the finallyInvocationSequence.
  32  */
  33 public void generateCode(BlockScope currentScope, CodeStream codeStream) {
  34
  35         if ((bits & IsReachableMASK) == 0) {
  36                 return;
  37         }
  38         int pc = codeStream.position;
  39
  40         // generation of code responsible for invoking the finally
  41         // blocks in sequence
  42         if (subroutines != null){
  43                 for (int i = 0, max = subroutines.length; i < max; i++){
  44                         AstNode sub;
  45                         if ((sub = subroutines[i]) instanceof SynchronizedStatement){
  46                                 codeStream.load(((SynchronizedStatement)sub).synchroVariable);
  47                                 codeStream.monitorexit();
  48                         } else {
  49                                 TryStatement trySub = (TryStatement) sub;
  50                                 if (trySub.subRoutineCannotReturn)      {
  51                                         codeStream.goto_(trySub.subRoutineStartLabel);
  52                                         codeStream.recordPositionsFrom(pc, this.sourceStart);
  53                                         return;
  54                                 } else {
  55                                         codeStream.jsr(trySub.subRoutineStartLabel);
  56                                 }
  57                         }
  58                 }
  59         }
  60         codeStream.goto_(targetLabel);
  61         codeStream.recordPositionsFrom(pc, this.sourceStart);
  62 }
  63 public void resetStateForCodeGeneration() {
  64         this.targetLabel.resetStateForCodeGeneration();
  65 }
  66 }