/* Software Name : AsmDex
* Version : 1.0
*
* Copyright © 2012 France Télécom
* 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. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.ow2.asmdex.instruction;
import org.ow2.asmdex.lowLevelUtils.ByteVector;
import org.ow2.asmdex.structureCommon.Label;
import org.ow2.asmdex.structureWriter.ConstantPool;
/**
* A Sparse-Switch Pseudo-Instruction. It should use a 4-byte alignment but it is NOT
* managed here.
*
* @author Julien Névo
*/
public class PseudoInstructionSparseSwitch extends Instruction implements IPseudoInstruction {
/**
* The opcode of this Pseudo Instruction.
*/
private final static int SPARSE_SWITCH_OPCODE = 0x200;
/**
* The keys for each Case.
*/
private int[] keys;
/**
* The targets for each Case.
*/
private Label[] targets;
/**
* Reference to the Sparse Switch Instruction.
*/
private IOffsetInstruction instructionSparseSwitch;
@Override
public IOffsetInstruction getSourceInstruction() {
return instructionSparseSwitch;
}
/**
* Constructor of the Sparse Switch Pseudo Instruction.
* @param keys the keys for each Case.
* @param targets the targets for each Case.
* @param instructionSparseSwitch reference to the Sparse Switch Instruction.
*/
public PseudoInstructionSparseSwitch(int[] keys, Label[] targets, IOffsetInstruction instructionSparseSwitch) {
super(SPARSE_SWITCH_OPCODE);
this.keys = keys;
this.targets = targets;
this.instructionSparseSwitch = instructionSparseSwitch;
}
@Override
public int getSize() {
return targets.length * 8 + 2 + 2; // Additions for the Opcode (2) and size (2) .
}
// @Override
// public int[] getUsedRegisters() {
// return null;
// }
// @Override
// public int getNbEncodedRegisters() {
// return 0;
// }
@Override
public void write(ByteVector out, ConstantPool constantPool) {
out.putShort(SPARSE_SWITCH_OPCODE);
int size = targets.length;
out.putShort(size);
for (int i = 0; i < size; i++) {
out.putInt(keys[i]);
}
for (int i = 0; i < size; i++) {
out.putInt((targets[i].getOffset() - instructionSparseSwitch.getInstructionOffset()) / 2);
}
}
}