/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
package com.sun.org.apache.bcel.internal.generic;
/* ====================================================================
* The Apache Software License, Version 1.1
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* reserved.
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* modification, are permitted provided that the following conditions
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* "This product includes software developed by the
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* Alternately, this acknowledgment may appear in the software itself,
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* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
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*/
import java.io.*;
import com.sun.org.apache.bcel.internal.util.ByteSequence;
/**
* TABLESWITCH - Switch within given range of values, i.e., low..high
*
* @version $Id: TABLESWITCH.java,v 1.1.2.1 2005/07/31 23:45:42 jeffsuttor Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
* @see SWITCH
*/
public class TABLESWITCH extends Select {
/**
* Empty constructor needed for the Class.newInstance() statement in
* Instruction.readInstruction(). Not to be used otherwise.
*/
TABLESWITCH() {}
/**
* @param match sorted array of match values, match[0] must be low value,
* match[match_length - 1] high value
* @param targets where to branch for matched values
* @param target default branch
*/
public TABLESWITCH(int[] match, InstructionHandle[] targets,
InstructionHandle target) {
super(com.sun.org.apache.bcel.internal.Constants.TABLESWITCH, match, targets, target);
length = (short)(13 + match_length * 4); /* Alignment remainder assumed
* 0 here, until dump time */
fixed_length = length;
}
/**
* Dump instruction as byte code to stream out.
* @param out Output stream
*/
public void dump(DataOutputStream out) throws IOException {
super.dump(out);
int low = (match_length > 0)? match[0] : 0;
out.writeInt(low);
int high = (match_length > 0)? match[match_length - 1] : 0;
out.writeInt(high);
for(int i=0; i < match_length; i++) // jump offsets
out.writeInt(indices[i] = getTargetOffset(targets[i]));
}
/**
* Read needed data (e.g. index) from file.
*/
protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException
{
super.initFromFile(bytes, wide);
int low = bytes.readInt();
int high = bytes.readInt();
match_length = high - low + 1;
fixed_length = (short)(13 + match_length * 4);
length = (short)(fixed_length + padding);
match = new int[match_length];
indices = new int[match_length];
targets = new InstructionHandle[match_length];
for(int i=low; i <= high; i++)
match[i - low] = i;
for(int i=0; i < match_length; i++) {
indices[i] = bytes.readInt();
}
}
/**
* 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.visitVariableLengthInstruction(this);
v.visitStackProducer(this);
v.visitBranchInstruction(this);
v.visitSelect(this);
v.visitTABLESWITCH(this);
}
}