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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
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package com.sun.org.apache.bcel.internal.generic;

import java.io.*;
import com.sun.org.apache.bcel.internal.util.ByteSequence;

RET - Return from subroutine
Stack: ..., -> ..., address
Author: M. Dahm
/** * RET - Return from subroutine * * <PRE>Stack: ..., -&gt; ..., address</PRE> * * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> */
public class RET extends Instruction implements IndexedInstruction, TypedInstruction { private boolean wide; private int index; // index to local variable containg the return address
Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction(). Not to be used otherwise.
/** * Empty constructor needed for the Class.newInstance() statement in * Instruction.readInstruction(). Not to be used otherwise. */
RET() {} public RET(int index) { super(com.sun.org.apache.bcel.internal.Constants.RET, (short)2); setIndex(index); // May set wide as side effect }
Dump instruction as byte code to stream out.
Params:
  • out – Output stream
/** * Dump instruction as byte code to stream out. * @param out Output stream */
public void dump(DataOutputStream out) throws IOException { if(wide) out.writeByte(com.sun.org.apache.bcel.internal.Constants.WIDE); out.writeByte(opcode); if(wide) out.writeShort(index); else out.writeByte(index); } private final void setWide() { if(wide = index > com.sun.org.apache.bcel.internal.Constants.MAX_BYTE) length = 4; // Including the wide byte else length = 2; }
Read needed data (e.g. index) from file.
/** * Read needed data (e.g. index) from file. */
protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException { this.wide = wide; if(wide) { index = bytes.readUnsignedShort(); length = 4; } else { index = bytes.readUnsignedByte(); length = 2; } }
Returns:index of local variable containg the return address
/** * @return index of local variable containg the return address */
public final int getIndex() { return index; }
Set index of local variable containg the return address
/** * Set index of local variable containg the return address */
public final void setIndex(int n) { if(n < 0) throw new ClassGenException("Negative index value: " + n); index = n; setWide(); }
Returns:mnemonic for instruction
/** * @return mnemonic for instruction */
public String toString(boolean verbose) { return super.toString(verbose) + " " + index; }
Returns:return address type
/** @return return address type */
public Type getType(ConstantPoolGen cp) { return ReturnaddressType.NO_TARGET; }
Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
Params:
  • v – Visitor object
/** * Call corresponding visitor method(s). The order is: * Call visitor methods of implemented interfaces first, then * call methods according to the class hierarchy in descending order, * i.e., the most specific visitXXX() call comes last. * * @param v Visitor object */
public void accept(Visitor v) { v.visitRET(this); } }