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