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      1 /*
      2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
      3  *             of Java bytecode.
      4  *
      5  * Copyright (c) 2002-2014 Eric Lafortune (eric (at) graphics.cornell.edu)
      6  *
      7  * This program is free software; you can redistribute it and/or modify it
      8  * under the terms of the GNU General Public License as published by the Free
      9  * Software Foundation; either version 2 of the License, or (at your option)
     10  * any later version.
     11  *
     12  * This program is distributed in the hope that it will be useful, but WITHOUT
     13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
     15  * more details.
     16  *
     17  * You should have received a copy of the GNU General Public License along
     18  * with this program; if not, write to the Free Software Foundation, Inc.,
     19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
     20  */
     21 package proguard.classfile.instruction;
     22 
     23 /**
     24  * This Instruction represents a simple instruction without variable arguments
     25  * or constant pool references.
     26  *
     27  * @author Eric Lafortune
     28  */
     29 public abstract class SwitchInstruction extends Instruction
     30 {
     31     public int   defaultOffset;
     32     public int[] jumpOffsets;
     33 
     34 
     35     /**
     36      * Creates an uninitialized SwitchInstruction.
     37      */
     38     public SwitchInstruction() {}
     39 
     40 
     41     /**
     42      * Creates a new SwitchInstruction with the given arguments.
     43      */
     44     public SwitchInstruction(byte  opcode,
     45                              int   defaultOffset,
     46                              int[] jumpOffsets)
     47     {
     48         this.opcode        = opcode;
     49         this.defaultOffset = defaultOffset;
     50         this.jumpOffsets   = jumpOffsets;
     51     }
     52 
     53 
     54     /**
     55      * Copies the given instruction into this instruction.
     56      * @param switchInstruction the instruction to be copied.
     57      * @return this instruction.
     58      */
     59     public SwitchInstruction copy(SwitchInstruction switchInstruction)
     60     {
     61         this.opcode        = switchInstruction.opcode;
     62         this.defaultOffset = switchInstruction.defaultOffset;
     63         this.jumpOffsets   = switchInstruction.jumpOffsets;
     64 
     65         return this;
     66     }
     67 
     68 
     69     // Implementations for Instruction.
     70 
     71     public String toString(int offset)
     72     {
     73         return "["+offset+"] "+toString()+" (target="+(offset+defaultOffset)+")";
     74     }
     75 
     76 
     77     // Implementations for Object.
     78 
     79     public String toString()
     80     {
     81         return getName()+" ("+jumpOffsets.length+" offsets, default="+defaultOffset+")";
     82     }
     83 }
     84