001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.generic; 019 020import java.io.DataOutputStream; 021import java.io.IOException; 022 023import org.apache.bcel.util.ByteSequence; 024 025/** 026 * SIPUSH - Push short 027 * 028 * <PRE>Stack: ... -> ..., value</PRE> 029 * 030 * @version $Id: SIPUSH.java 1747278 2016-06-07 17:28:43Z britter $ 031 */ 032public class SIPUSH extends Instruction implements ConstantPushInstruction { 033 034 private short b; 035 036 037 /** 038 * Empty constructor needed for the Class.newInstance() statement in 039 * Instruction.readInstruction(). Not to be used otherwise. 040 */ 041 SIPUSH() { 042 } 043 044 045 public SIPUSH(final short b) { 046 super(org.apache.bcel.Const.SIPUSH, (short) 3); 047 this.b = b; 048 } 049 050 051 /** 052 * Dump instruction as short code to stream out. 053 */ 054 @Override 055 public void dump( final DataOutputStream out ) throws IOException { 056 super.dump(out); 057 out.writeShort(b); 058 } 059 060 061 /** 062 * @return mnemonic for instruction 063 */ 064 @Override 065 public String toString( final boolean verbose ) { 066 return super.toString(verbose) + " " + b; 067 } 068 069 070 /** 071 * Read needed data (e.g. index) from file. 072 */ 073 @Override 074 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 075 super.setLength(3); 076 b = bytes.readShort(); 077 } 078 079 080 @Override 081 public Number getValue() { 082 return Integer.valueOf(b); 083 } 084 085 086 /** @return Type.SHORT 087 */ 088 @Override 089 public Type getType( final ConstantPoolGen cp ) { 090 return Type.SHORT; 091 } 092 093 094 /** 095 * Call corresponding visitor method(s). The order is: 096 * Call visitor methods of implemented interfaces first, then 097 * call methods according to the class hierarchy in descending order, 098 * i.e., the most specific visitXXX() call comes last. 099 * 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}