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