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fernflower/src/org/jetbrains/java/decompiler/code/SwitchInstruction.java

61 lines
1.6 KiB

// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.jetbrains.java.decompiler.code;
11 years ago
public class SwitchInstruction extends Instruction {
private int[] destinations;
private int[] values;
private int defaultDestination;
public SwitchInstruction(int opcode, int group, boolean wide, int bytecodeVersion, int[] operands) {
super(opcode, group, wide, bytecodeVersion, operands);
}
@Override
public void initInstruction(InstructionSequence seq) {
defaultDestination = seq.getPointerByRelOffset(operands[0]);
int prefix = opcode == CodeConstants.opc_tableswitch ? 3 : 2;
int len = operands.length - prefix;
int low = 0;
if (opcode == CodeConstants.opc_lookupswitch) {
len /= 2;
}
else {
low = operands[1];
}
destinations = new int[len];
values = new int[len];
for (int i = 0, k = 0; i < len; i++, k++) {
if (opcode == CodeConstants.opc_lookupswitch) {
values[i] = operands[prefix + k];
k++;
}
else {
values[i] = low + k;
}
destinations[i] = seq.getPointerByRelOffset(operands[prefix + k]);
}
}
public int[] getDestinations() {
return destinations;
}
public int[] getValues() {
return values;
}
public int getDefaultDestination() {
return defaultDestination;
}
@Override
public SwitchInstruction clone() {
SwitchInstruction copy = (SwitchInstruction)super.clone();
copy.defaultDestination = defaultDestination;
copy.destinations = destinations.clone();
copy.values = values.clone();
return copy;
}
}