| 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; |
| import org.aspectj.apache.bcel.classfile.ConstantPool; |
| |
| /** |
| * INVOKEINTERFACE - Invoke interface method |
| * |
| * <PRE> |
| * Stack: ..., objectref, [arg1, [arg2 ...]] -> ... |
| * </PRE> |
| * |
| * @version $Id: INVOKEINTERFACE.java,v 1.4 2009/10/05 17:35:36 aclement Exp $ |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| */ |
| public final class INVOKEINTERFACE extends InvokeInstruction { |
| private int nargs; // Number of arguments on stack (number of stack slots), called "count" in vmspec2 |
| |
| public INVOKEINTERFACE(int index, int nargs, int zerobyte) { |
| super(Constants.INVOKEINTERFACE, index); |
| |
| if (nargs < 1) { |
| throw new ClassGenException("Number of arguments must be > 0 " + nargs); |
| } |
| |
| this.nargs = nargs; |
| } |
| |
| /** |
| * Dump instruction as byte code to stream out. |
| * |
| * @param out Output stream |
| */ |
| public void dump(DataOutputStream out) throws IOException { |
| out.writeByte(opcode); |
| out.writeShort(index); |
| out.writeByte(nargs); |
| out.writeByte(0); |
| } |
| |
| /** |
| * The <B>count</B> argument according to the Java Language Specification, Second Edition. |
| */ |
| public int getCount() { |
| return nargs; |
| } |
| |
| /** |
| * @return mnemonic for instruction with symbolic references resolved |
| */ |
| public String toString(ConstantPool cp) { |
| return super.toString(cp) + " " + nargs; |
| } |
| |
| public int consumeStack(ConstantPool cpg) { // nargs is given in byte-code |
| return nargs; // nargs includes this reference |
| } |
| |
| public boolean equals(Object other) { |
| if (!(other instanceof INVOKEINTERFACE)) { |
| return false; |
| } |
| INVOKEINTERFACE o = (INVOKEINTERFACE) other; |
| return o.opcode == opcode && o.index == index && o.nargs == nargs; |
| } |
| |
| public int hashCode() { |
| return opcode * 37 + index * (nargs + 17); |
| } |
| |
| } |