| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| package com.sun.org.apache.bcel.internal.generic; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 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 |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache BCEL", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * 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 |
| * <http://www.apache.org/>. |
| */ |
| import java.io.*; |
| import com.sun.org.apache.bcel.internal.util.ByteSequence; |
| |
| /** |
| * TABLESWITCH - Switch within given range of values, i.e., low..high |
| * |
| * @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); |
| } |
| } |