/* 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.Opcodes;
import org.ow2.asmdex.lowLevelUtils.ByteVector;
import org.ow2.asmdex.structureWriter.ConstantPool;
/**
* A Fill-Array-Data Pseudo-Instruction. It should use a 4-byte alignment but it is NOT
* managed here.
*
* @author Julien Névo
*/
public class PseudoInstructionFillArrayData extends Instruction implements IPseudoInstruction {
/**
* The opcode of this Pseudo Instruction.
*/
private final static int FILL_ARRAY_DATA_OPCODE = 0x300;
/**
* The number of bytes each elements of the array is composed of.
*/
private int elementWidth;
/**
* The data array.
*/
private Object[] dataArray;
/**
* Type of the element. Found according to the first element of the array. The type is
* for example Opcodes.VALUE_INT.
*/
private int type = -1;
/**
* Reference to the Fill Array Data Instruction.
*/
private IOffsetInstruction instructionFillArrayData;
@Override
public IOffsetInstruction getSourceInstruction() {
return instructionFillArrayData;
}
/**
* Constructor of this Instruction.
* @param dataArray The data array. It must at least have one element, else there's no point in
* building an array.
* @param instructionFillArrayData reference to the Fill Array Data Instruction.
*/
public PseudoInstructionFillArrayData(Object[] dataArray, IOffsetInstruction instructionFillArrayData) {
super(FILL_ARRAY_DATA_OPCODE);
this.dataArray = dataArray;
this.instructionFillArrayData = instructionFillArrayData;
setElementWidthAndType();
}
@Override
public int getSize() {
return ((dataArray.length * elementWidth + 1) / 2 + 4) * 2; // Additions for the Opcode (2), elementWidth (2) and size (4).
}
// @Override
// public int[] getUsedRegisters() {
// return null;
// }
// @Override
// public int getNbEncodedRegisters() {
// return 0;
// }
@Override
public void write(ByteVector out, ConstantPool constantPool) {
out.putShort(FILL_ARRAY_DATA_OPCODE);
out.putShort(elementWidth);
int size = dataArray.length;
out.putInt(size);
switch (type) {
case Opcodes.VALUE_BYTE: {
for (int i = 0; i < size; i++) {
out.putByte((Byte)dataArray[i]);
}
if (size % 2 == 1) out.putByte(0);
break;
}
case Opcodes.VALUE_SHORT: {
for (int i = 0; i < size; i++) {
out.putShort((Short)dataArray[i]);
}
break;
}
case Opcodes.VALUE_CHAR: {
for (int i = 0; i < size; i++) {
out.putShort((Character)dataArray[i]);
}
break;
}
case Opcodes.VALUE_INT: {
for (int i = 0; i < size; i++) {
out.putInt((Integer)dataArray[i]);
}
break;
}
case Opcodes.VALUE_FLOAT: {
for (int i = 0; i < size; i++) {
out.putInt(Float.floatToRawIntBits((Float)dataArray[i]));
}
break;
}
case Opcodes.VALUE_DOUBLE: {
for (int i = 0; i < size; i++) {
out.putLong(Double.doubleToRawLongBits((Double)dataArray[i]));
}
break;
}
case Opcodes.VALUE_LONG: {
for (int i = 0; i < size; i++) {
out.putLong((Long)dataArray[i]);
}
break;
}
case Opcodes.VALUE_BOOLEAN: {
for (int i = 0; i < size; i++) {
out.putByte(((Boolean)dataArray[i]) ? -1 : 0);
}
if (size % 2 == 1) out.putByte(0);
break;
}
}
}
/**
* Finds the width (in bytes) and type of the data array, found according to the first element
* of the array. The type is for example Opcodes.VALUE_INT.
*/
private void setElementWidthAndType() {
Object value = dataArray[0];
if (value instanceof Integer) {
elementWidth = 4;
type = Opcodes.VALUE_INT;
} else if (value instanceof Boolean) {
elementWidth = 1;
type = Opcodes.VALUE_BOOLEAN;
} else if (value instanceof Byte) {
elementWidth = 1;
type = Opcodes.VALUE_BYTE;
} else if (value instanceof Character) {
elementWidth = 2;
type = Opcodes.VALUE_CHAR;
} else if (value instanceof Double) {
elementWidth = 8;
type = Opcodes.VALUE_DOUBLE;
} else if (value instanceof Float) {
elementWidth = 4;
type = Opcodes.VALUE_FLOAT;
} else if (value instanceof Long) {
elementWidth = 8;
type = Opcodes.VALUE_LONG;
} else if (value instanceof Short) {
elementWidth = 2;
type = Opcodes.VALUE_SHORT;
} else {
throw new IllegalArgumentException("Array of this type can't be encoded.");
}
}
}