1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package com.sun.org.apache.bcel.internal.generic; 21 22 import java.io.DataOutputStream; 23 import java.io.IOException; 24 25 import com.sun.org.apache.bcel.internal.util.ByteSequence; 26 27 /** 28 * BIPUSH - Push byte on stack 29 * 30 * <PRE>Stack: ... -> ..., value</PRE> 31 * 32 * @version $Id$ 33 */ 34 public class BIPUSH extends Instruction implements ConstantPushInstruction { 35 36 private byte b; 37 38 39 /** 40 * Empty constructor needed for Instruction.readInstruction. 41 * Not to be used otherwise. 42 */ 43 BIPUSH() { 44 } 45 46 47 /** Push byte on stack 48 */ 49 public BIPUSH(final byte b) { 50 super(com.sun.org.apache.bcel.internal.Const.BIPUSH, (short) 2); 51 this.b = b; 52 } 53 54 55 /** 56 * Dump instruction as byte code to stream out. 57 */ 58 @Override 59 public void dump( final DataOutputStream out ) throws IOException { 60 super.dump(out); 61 out.writeByte(b); 62 } 63 64 65 /** 66 * @return mnemonic for instruction 67 */ 68 @Override 69 public String toString( final boolean verbose ) { 70 return super.toString(verbose) + " " + b; 71 } 72 73 74 /** 75 * Read needed data (e.g. index) from file. 76 */ 77 @Override 78 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 79 super.setLength(2); 80 b = bytes.readByte(); 81 } 82 83 84 @Override 85 public Number getValue() { 86 return Integer.valueOf(b); 87 } 88 89 90 /** @return Type.BYTE 91 */ 92 @Override 93 public Type getType( final ConstantPoolGen cp ) { 94 return Type.BYTE; 95 } 96 97 98 /** 99 * Call corresponding visitor method(s). The order is: 100 * Call visitor methods of implemented interfaces first, then 101 * call methods according to the class hierarchy in descending order, 102 * i.e., the most specific visitXXX() call comes last. 103 * 104 * @param v Visitor object 105 */ 106 @Override 107 public void accept( final Visitor v ) { 108 v.visitPushInstruction(this); 109 v.visitStackProducer(this); 110 v.visitTypedInstruction(this); 111 v.visitConstantPushInstruction(this); 112 v.visitBIPUSH(this); 113 } 114 }