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.CodeStream;
  14 import net.sourceforge.phpdt.internal.compiler.codegen.Label;
  15 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  16
  17 public abstract class BranchStatement extends Statement {
  18         public char[] label;
  19         public Label targetLabel;
  20         public AstNode[] subroutines;
  21 /**
  22  * BranchStatement constructor comment.
  23  */
  24 public BranchStatement(char[] l, int s,int e) {
  25         label = l ;
  26         sourceStart = s;
  27         sourceEnd = e;
  28 }
  29 /**
  30  * Branch code generation
  31  *
  32  *   generate the finallyInvocationSequence.
  33  */
  34 public void generateCode(BlockScope currentScope, CodeStream codeStream) {
  35
  36         if ((bits & IsReachableMASK) == 0) {
  37                 return;
  38         }
  39         int pc = codeStream.position;
  40
  41         // generation of code responsible for invoking the finally
  42         // blocks in sequence
  43         if (subroutines != null){
  44                 for (int i = 0, max = subroutines.length; i < max; i++){
  45                         AstNode sub;
  46                         if ((sub = subroutines[i]) instanceof SynchronizedStatement){
  47                                 codeStream.load(((SynchronizedStatement)sub).synchroVariable);
  48                                 codeStream.monitorexit();
  49                         } else {
  50                                 TryStatement trySub = (TryStatement) sub;
  51                                 if (trySub.subRoutineCannotReturn)      {
  52                                         codeStream.goto_(trySub.subRoutineStartLabel);
  53                                         codeStream.recordPositionsFrom(pc, this.sourceStart);
  54                                         return;
  55                                 } else {
  56                                         codeStream.jsr(trySub.subRoutineStartLabel);
  57                                 }
  58                         }
  59                 }
  60         }
  61         codeStream.goto_(targetLabel);
  62         codeStream.recordPositionsFrom(pc, this.sourceStart);
  63 }
  64 public void resetStateForCodeGeneration() {
  65         this.targetLabel.resetStateForCodeGeneration();
  66 }
  67 }