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1 package org.apache.bcel.generic; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import java.io.*; 58 import org.apache.bcel.util.ByteSequence; 59 60 /*** 61 * BIPUSH - Push byte on stack 62 * 63 * <PRE>Stack: ... -> ..., value</PRE> 64 * 65 * @version $Id: BIPUSH.java,v 1.2 2002/08/07 18:01:32 mdahm Exp $ 66 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 67 */ 68 public class BIPUSH extends Instruction implements ConstantPushInstruction { 69 private byte b; 70 71 /*** 72 * Empty constructor needed for the Class.newInstance() statement in 73 * Instruction.readInstruction(). Not to be used otherwise. 74 */ 75 BIPUSH() {} 76 77 /*** Push byte on stack 78 */ 79 public BIPUSH(byte b) { 80 super(org.apache.bcel.Constants.BIPUSH, (short)2); 81 this.b = b; 82 } 83 84 /*** 85 * Dump instruction as byte code to stream out. 86 */ 87 public void dump(DataOutputStream out) throws IOException { 88 super.dump(out); 89 out.writeByte(b); 90 } 91 92 /*** 93 * @return mnemonic for instruction 94 */ 95 public String toString(boolean verbose) { 96 return super.toString(verbose) + " " + b; 97 } 98 99 /*** 100 * Read needed data (e.g. index) from file. 101 */ 102 protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException 103 { 104 length = 2; 105 b = bytes.readByte(); 106 } 107 108 public Number getValue() { return new Integer(b); } 109 110 /*** @return Type.BYTE 111 */ 112 public Type getType(ConstantPoolGen cp) { 113 return Type.BYTE; 114 } 115 116 /*** 117 * Call corresponding visitor method(s). The order is: 118 * Call visitor methods of implemented interfaces first, then 119 * call methods according to the class hierarchy in descending order, 120 * i.e., the most specific visitXXX() call comes last. 121 * 122 * @param v Visitor object 123 */ 124 public void accept(Visitor v) { 125 v.visitPushInstruction(this); 126 v.visitStackProducer(this); 127 v.visitTypedInstruction(this); 128 v.visitConstantPushInstruction(this); 129 v.visitBIPUSH(this); 130 } 131 }

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