package org.aspectj.apache.bcel.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.DataOutputStream;
import java.io.IOException;

import org.aspectj.apache.bcel.Constants;

/**
 * IINC - Increment local variable by constant
 * 
 * @version $Id: IINC.java,v 1.5 2009/10/05 17:35:36 aclement Exp $
 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 */
public class IINC extends InstructionLV {
	private int c;

	public IINC(int n, int c, boolean w) {
		super(Constants.IINC, n);
		this.c = c;
		// this.wide = w;//((n > org.aspectj.apache.bcel.Constants.MAX_BYTE) || (Math.abs(c) > Byte.MAX_VALUE));
	}

	private boolean wide() {
		return ((lvar > org.aspectj.apache.bcel.Constants.MAX_BYTE) || (Math.abs(c) > Byte.MAX_VALUE));
	}

	public void dump(DataOutputStream out) throws IOException {
		if (wide()) {
			out.writeByte(WIDE);
			out.writeByte(opcode);
			out.writeShort(lvar);
			out.writeShort(c);
		} else {
			out.writeByte(opcode);
			out.writeByte(lvar);
			out.writeByte(c);
		}
	}

	public int getLength() {
		if (wide()) {
			return 6;
		} else {
			return 3; // includes wide byte
		}
	}

	public String toString(boolean verbose) {
		return super.toString(verbose) + " " + c;
	}

	public final int getIncrement() {
		return c;
	}

	public boolean equals(Object other) {
		if (!(other instanceof IINC)) {
			return false;
		}
		IINC o = (IINC) other;
		return /* o.opcode == opcode && */o.lvar == lvar && o.c == c;
	}

	public int hashCode() {
		return opcode * 37 + lvar * (c + 17);
	}

}
