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      1 /*
      2  * [The "BSD licence"]
      3  * Copyright (c) 2010 Ben Gruver (JesusFreke)
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 package org.jf.baksmali.Adaptors.Format;
     30 
     31 import org.jf.baksmali.Adaptors.LabelMethodItem;
     32 import org.jf.baksmali.Adaptors.MethodDefinition;
     33 import org.jf.baksmali.baksmaliOptions;
     34 import org.jf.dexlib2.Opcode;
     35 import org.jf.dexlib2.iface.instruction.OffsetInstruction;
     36 import org.jf.util.IndentingWriter;
     37 
     38 import javax.annotation.Nonnull;
     39 import java.io.IOException;
     40 
     41 public class OffsetInstructionFormatMethodItem extends InstructionMethodItem<OffsetInstruction> {
     42     protected LabelMethodItem label;
     43 
     44     public OffsetInstructionFormatMethodItem(@Nonnull baksmaliOptions options, @Nonnull MethodDefinition methodDef,
     45                                              int codeAddress, OffsetInstruction instruction) {
     46         super(methodDef, codeAddress, instruction);
     47 
     48         label = new LabelMethodItem(options, codeAddress + instruction.getCodeOffset(), getLabelPrefix());
     49         label = methodDef.getLabelCache().internLabel(label);
     50     }
     51 
     52     @Override
     53     protected void writeTargetLabel(IndentingWriter writer) throws IOException {
     54         label.writeTo(writer);
     55     }
     56 
     57     public LabelMethodItem getLabel() {
     58         return label;
     59     }
     60 
     61     private String getLabelPrefix() {
     62         Opcode opcode = instruction.getOpcode();
     63         switch (opcode.format) {
     64             case Format10t:
     65             case Format20t:
     66             case Format30t:
     67                 return "goto_";
     68             case Format21t:
     69             case Format22t:
     70                 return "cond_";
     71             case Format31t:
     72                 if (opcode == Opcode.FILL_ARRAY_DATA) {
     73                     return "array_";
     74                 }
     75                 if (opcode == Opcode.PACKED_SWITCH) {
     76                     return "pswitch_data_";
     77                 }
     78                 // Opcode.SPARSE_SWITCH;
     79                 return "sswitch_data_";
     80         }
     81 
     82         assert false;
     83         return null;
     84     }
     85 }
     86