content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 The Apache Software Foundation.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id: CompareGenerator.java,v 1.2.4.1 2005/09/05 11:08:02 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util;
  
  import jaxp.sun.org.apache.bcel.internal.generic.ACONST_NULL;
  import jaxp.sun.org.apache.bcel.internal.generic.ALOAD;
  import jaxp.sun.org.apache.bcel.internal.generic.ASTORE;
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.ILOAD;
  import jaxp.sun.org.apache.bcel.internal.generic.ISTORE;
  import jaxp.sun.org.apache.bcel.internal.generic.Instruction;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.LocalVariableGen;
  import jaxp.sun.org.apache.bcel.internal.generic.Type;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  public final class CompareGenerator extends MethodGenerator {
  
      private static int DOM_INDEX      = 1;
      private static int CURRENT_INDEX  = 2;
      private static int LEVEL_INDEX    = 3;
      private static int TRANSLET_INDEX = 4;
      private static int LAST_INDEX     = 5;
      private int ITERATOR_INDEX = 6;
  
      private final Instruction _iloadCurrent;
      private final Instruction _istoreCurrent;
      private final Instruction _aloadDom;
      private final Instruction _iloadLast;
      private final Instruction _aloadIterator;
      private final Instruction _astoreIterator;
  
      public CompareGenerator(int access_flags, jaxp.sun.org.apache.bcel.internal.generic.Type return_type,
                              Type[] arg_types, String[] arg_names,
                              String method_name, String class_name,
                              InstructionList il, ConstantPoolGen cp) {
          super(access_flags, return_type, arg_types, arg_names, method_name,
                class_name, il, cp);
  
          _iloadCurrent = new ILOAD(CURRENT_INDEX);
          _istoreCurrent = new ISTORE(CURRENT_INDEX);
          _aloadDom = new ALOAD(DOM_INDEX);
          _iloadLast = new ILOAD(LAST_INDEX);
  
          LocalVariableGen iterator =
              addLocalVariable("iterator",
                               Util.getJCRefType(Constants.NODE_ITERATOR_SIG),
                               null, null);
          ITERATOR_INDEX = iterator.getIndex();
          _aloadIterator = new ALOAD(ITERATOR_INDEX);
          _astoreIterator = new ASTORE(ITERATOR_INDEX);
          il.append(new ACONST_NULL());
          il.append(storeIterator());
      }
  
      public Instruction loadLastNode() {
          return _iloadLast;
      }
  
      public Instruction loadCurrentNode() {
          return _iloadCurrent;
      }
  
      public Instruction storeCurrentNode() {
          return _istoreCurrent;
      }
  
      public Instruction loadDOM() {
          return _aloadDom;
      }
  
      public int getHandlerIndex() {
          return INVALID_INDEX;           // not available
      }
  
      public int getIteratorIndex() {
          return INVALID_INDEX;
      }
  
      public Instruction storeIterator() {
          return _astoreIterator;
      }
  
      public Instruction loadIterator() {
          return _aloadIterator;
      }
  
      //??? may not be used anymore
      public int getLocalIndex(String name) {
          if (name.equals("current")) {
              return CURRENT_INDEX;
          }
          return super.getLocalIndex(name);
      }
  }
  