| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| package com.sun.org.apache.bcel.internal.classfile; |
| |
| /* ==================================================================== |
| * 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 com.sun.org.apache.bcel.internal.Constants; |
| import java.io.*; |
| |
| /** |
| * This class represents a (PC offset, line number) pair, i.e., a line number in |
| * the source that corresponds to a relative address in the byte code. This |
| * is used for debugging purposes. |
| * |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @see LineNumberTable |
| */ |
| public final class LineNumber implements Cloneable, Node, Serializable { |
| private int start_pc; // Program Counter (PC) corresponds to line |
| private int line_number; // number in source file |
| |
| /** |
| * Initialize from another object. |
| */ |
| public LineNumber(LineNumber c) { |
| this(c.getStartPC(), c.getLineNumber()); |
| } |
| |
| /** |
| * Construct object from file stream. |
| * @param file Input stream |
| * @throws IOException |
| */ |
| LineNumber(DataInputStream file) throws IOException |
| { |
| this(file.readUnsignedShort(), file.readUnsignedShort()); |
| } |
| |
| /** |
| * @param start_pc Program Counter (PC) corresponds to |
| * @param line_number line number in source file |
| */ |
| public LineNumber(int start_pc, int line_number) |
| { |
| this.start_pc = start_pc; |
| this.line_number = line_number; |
| } |
| |
| /** |
| * Called by objects that are traversing the nodes of the tree implicitely |
| * defined by the contents of a Java class. I.e., the hierarchy of methods, |
| * fields, attributes, etc. spawns a tree of objects. |
| * |
| * @param v Visitor object |
| */ |
| public void accept(Visitor v) { |
| v.visitLineNumber(this); |
| } |
| |
| /** |
| * Dump line number/pc pair to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| public final void dump(DataOutputStream file) throws IOException |
| { |
| file.writeShort(start_pc); |
| file.writeShort(line_number); |
| |
| } |
| /** |
| * @return Corresponding source line |
| */ |
| public final int getLineNumber() { return line_number; } |
| |
| /** |
| * @return PC in code |
| */ |
| public final int getStartPC() { return start_pc; } |
| |
| /** |
| * @param line_number. |
| */ |
| public final void setLineNumber(int line_number) { |
| this.line_number = line_number; |
| } |
| |
| /** |
| * @param start_pc. |
| */ |
| public final void setStartPC(int start_pc) { |
| this.start_pc = start_pc; |
| } |
| |
| /** |
| * @return String representation |
| */ |
| public final String toString() { |
| return "LineNumber(" + start_pc + ", " + line_number + ")"; |
| } |
| |
| /** |
| * @return deep copy of this object |
| */ |
| public LineNumber copy() { |
| try { |
| return (LineNumber)clone(); |
| } catch(CloneNotSupportedException e) {} |
| |
| return null; |
| } |
| } |