content: /*
   * [The "BSD licence"]
   * Copyright (c) 2010 Ben Gruver (JesusFreke)
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package com.taobao.android.baksmali.adaptors.Format;
  
  import com.taobao.android.baksmali.adaptors.CommentingIndentingWriter;
  import com.taobao.android.baksmali.adaptors.LabelMethodItem;
  import com.taobao.android.baksmali.adaptors.MethodDefinition;
  import com.taobao.android.baksmali.Renderers.IntegerRenderer;
  
  import org.jf.dexlib2.iface.instruction.SwitchElement;
  import org.jf.dexlib2.iface.instruction.formats.SparseSwitchPayload;
  import org.jf.util.IndentingWriter;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  public class SparseSwitchMethodItem extends InstructionMethodItem<SparseSwitchPayload> {
      private final List<SparseSwitchMethodItem.SparseSwitchTarget> targets;
  
      // Whether this sparse switch instruction should be commented out because it is never referenced
      private boolean commentedOut;
  
      public SparseSwitchMethodItem(MethodDefinition methodDef, int codeAddress, SparseSwitchPayload instruction) {
          super(methodDef, codeAddress, instruction);
  
          int baseCodeAddress = methodDef.getSparseSwitchBaseAddress(codeAddress);
  
          targets = new ArrayList<SparseSwitchMethodItem.SparseSwitchTarget>();
          if (baseCodeAddress >= 0) {
              for (SwitchElement switchElement: instruction.getSwitchElements()) {
                  LabelMethodItem label = methodDef.getLabelCache().internLabel(
                          new LabelMethodItem( methodDef.classDef.options, baseCodeAddress + switchElement.getOffset(),
                                  "sswitch_"));
                  targets.add(new SparseSwitchMethodItem.SparseSwitchLabelTarget(switchElement.getKey(), label));
              }
          } else {
              commentedOut = true;
              //if we couldn't determine a base address, just use relative offsets rather than labels
              for (SwitchElement switchElement: instruction.getSwitchElements()) {
                  targets.add(new SparseSwitchMethodItem.SparseSwitchOffsetTarget(switchElement.getKey(), switchElement.getOffset()));
              }
          }
      }
  
      @Override
      public boolean writeTo(IndentingWriter writer) throws IOException {
          if (commentedOut) {
              writer = new org.jf.baksmali.Adaptors.CommentingIndentingWriter(writer);
          }
  
          writer.write(".sparse-switch\n");
          writer.indent(4);
          for (SparseSwitchMethodItem.SparseSwitchTarget target: targets) {
              org.jf.baksmali.Renderers.IntegerRenderer.writeTo(writer, target.getKey());
              writer.write(" -> ");
              target.writeTargetTo(writer);
              writeCommentIfResourceId(writer, target.getKey());
              writer.write('\n');
          }
          writer.deindent(4);
          writer.write(".end sparse-switch");
          return true;
      }
  
      private static abstract class SparseSwitchTarget {
          private final int key;
          public SparseSwitchTarget(int key) {
              this.key = key;
          }
          public int getKey() { return key; }
          public abstract void writeTargetTo(IndentingWriter writer) throws IOException;
      }
  
      private static class SparseSwitchLabelTarget extends SparseSwitchMethodItem.SparseSwitchTarget {
          private final LabelMethodItem target;
          public SparseSwitchLabelTarget(int key, LabelMethodItem target) {
              super(key);
              this.target = target;
          }
  
          public void writeTargetTo(IndentingWriter writer) throws IOException {
              target.writeTo(writer);
          }
      }
  
      private static class SparseSwitchOffsetTarget extends SparseSwitchMethodItem.SparseSwitchTarget {
          private final int target;
          public SparseSwitchOffsetTarget(int key, int target) {
              super(key);
              this.target = target;
          }
  
          public void writeTargetTo(IndentingWriter writer) throws IOException {
              if (target >= 0) {
                  writer.write('+');
              }
              writer.printSignedIntAsDec(target);
          }
      }
  }
  