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 org.jf.dexlib.Code;
  
  import org.jf.dexlib.Code.Format.ArrayDataPseudoInstruction;
  import org.jf.dexlib.Code.Format.Instruction10x;
  import org.jf.dexlib.Code.Format.PackedSwitchDataPseudoInstruction;
  import org.jf.dexlib.Code.Format.SparseSwitchDataPseudoInstruction;
  import org.jf.dexlib.DexFile;
  import org.jf.dexlib.Util.ExceptionWithContext;
  import org.jf.dexlib.Util.Hex;
  
  public class InstructionIterator {
      public static void IterateInstructions(DexFile dexFile, byte[] insns, ProcessInstructionDelegate delegate) {
          int insnsPosition = 0;
  
          while (insnsPosition < insns.length) {
              try
              {
                  Opcode opcode = Opcode.getOpcodeByValue(insns[insnsPosition]);
  
                  Instruction instruction = null;
                  if (opcode == null) {
                      System.err.println("Unknown opcode  address: "+Hex.u1(insnsPosition));
                      return;
                      //throw new RuntimeException("Unknown opcode: " + Hex.u1(insns[insnsPosition])+"  "+insns[insnsPosition+1]+s);
                  }
  
                  if (opcode == Opcode.NOP) {
                      byte secondByte = insns[insnsPosition + 1];
                      switch (secondByte) {
                          case 0:
                          {
                              instruction = new Instruction10x(Opcode.NOP, insns, insnsPosition);
                              break;
                          }
                          case 1:
                          {
                              instruction = new PackedSwitchDataPseudoInstruction(insns, insnsPosition);
                              break;
                          }
                          case 2:
                          {
                              instruction = new SparseSwitchDataPseudoInstruction(insns, insnsPosition);
                              break;
                          }
                          case 3:
                          {
                              instruction = new ArrayDataPseudoInstruction(insns, insnsPosition);
                              break;
                          }
                      }
                  } else {
                      instruction = opcode.format.Factory.makeInstruction(dexFile, opcode, insns, insnsPosition);
                  }
  
                  assert instruction != null;
  
                  delegate.ProcessInstruction(insnsPosition/2, instruction);
                  insnsPosition += instruction.getSize(insnsPosition/2)*2;
              } catch (Exception ex) {
                  throw ExceptionWithContext.withContext(ex, "Error occured at code address " + insnsPosition * 2);
              }
          }
      }
  
      public static interface ProcessInstructionDelegate {
          public void ProcessInstruction(int codeAddress, Instruction instruction);
      }
  }
  