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1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   package com.sun.org.apache.bcel.internal.generic;
6   
7   /* ====================================================================
8    * The Apache Software License, Version 1.1
9    *
10   * Copyright (c) 2001 The Apache Software Foundation.  All rights
11   * reserved.
12   *
13   * Redistribution and use in source and binary forms, with or without
14   * modification, are permitted provided that the following conditions
15   * are met:
16   *
17   * 1. Redistributions of source code must retain the above copyright
18   *    notice, this list of conditions and the following disclaimer.
19   *
20   * 2. Redistributions in binary form must reproduce the above copyright
21   *    notice, this list of conditions and the following disclaimer in
22   *    the documentation and/or other materials provided with the
23   *    distribution.
24   *
25   * 3. The end-user documentation included with the redistribution,
26   *    if any, must include the following acknowledgment:
27   *       "This product includes software developed by the
28   *        Apache Software Foundation (http://www.apache.org/)."
29   *    Alternately, this acknowledgment may appear in the software itself,
30   *    if and wherever such third-party acknowledgments normally appear.
31   *
32   * 4. The names "Apache" and "Apache Software Foundation" and
33   *    "Apache BCEL" must not be used to endorse or promote products
34   *    derived from this software without prior written permission. For
35   *    written permission, please contact apache@apache.org.
36   *
37   * 5. Products derived from this software may not be called "Apache",
38   *    "Apache BCEL", nor may "Apache" appear in their name, without
39   *    prior written permission of the Apache Software Foundation.
40   *
41   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52   * SUCH DAMAGE.
53   * ====================================================================
54   *
55   * This software consists of voluntary contributions made by many
56   * individuals on behalf of the Apache Software Foundation.  For more
57   * information on the Apache Software Foundation, please see
58   * <http://www.apache.org/>.
59   */
60  import java.io.*;
61  import com.sun.org.apache.bcel.internal.util.ByteSequence;
62  
63  /**
64   * SIPUSH - Push short
65   *
66   * <PRE>Stack: ... -&gt; ..., value</PRE>
67   *
68   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
69   */
70  public class SIPUSH extends Instruction implements ConstantPushInstruction {
71    private short b;
72  
73    /**
74     * Empty constructor needed for the Class.newInstance() statement in
75     * Instruction.readInstruction(). Not to be used otherwise.
76     */
77    SIPUSH() {}
78  
79    public SIPUSH(short b) {
80      super(com.sun.org.apache.bcel.internal.Constants.SIPUSH, (short)3);
81      this.b = b;
82    }
83  
84    /**
85     * Dump instruction as short code to stream out.
86     */
87    public void dump(DataOutputStream out) throws IOException {
88      super.dump(out);
89      out.writeShort(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 = 3;
105     b      = bytes.readShort();
106   }
107 
108   public Number getValue() { return new Integer(b); }
109 
110   /** @return Type.SHORT
111    */
112   public Type getType(ConstantPoolGen cp) {
113     return Type.SHORT;
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.visitSIPUSH(this);
130   }
131 }