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 package org.apache.bcel.generic;
18
19 import java.io.DataOutputStream;
20 import java.io.IOException;
21
22 import org.apache.bcel.util.ByteSequence;
23
24 /**
25 * SIPUSH - Push short
26 *
27 * <PRE>
28 * Stack: ... -> ..., value
29 * </PRE>
30 */
31 public class SIPUSH extends Instruction implements ConstantPushInstruction {
32
33 private short b;
34
35 /**
36 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
37 */
38 SIPUSH() {
39 }
40
41 public SIPUSH(final short b) {
42 super(org.apache.bcel.Const.SIPUSH, (short) 3);
43 this.b = b;
44 }
45
46 /**
47 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
48 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
49 *
50 * @param v Visitor object
51 */
52 @Override
53 public void accept(final Visitor v) {
54 v.visitPushInstruction(this);
55 v.visitStackProducer(this);
56 v.visitTypedInstruction(this);
57 v.visitConstantPushInstruction(this);
58 v.visitSIPUSH(this);
59 }
60
61 /**
62 * Dump instruction as short code to stream out.
63 */
64 @Override
65 public void dump(final DataOutputStream out) throws IOException {
66 super.dump(out);
67 out.writeShort(b);
68 }
69
70 /**
71 * @return Type.SHORT
72 */
73 @Override
74 public Type getType(final ConstantPoolGen cp) {
75 return Type.SHORT;
76 }
77
78 @Override
79 public Number getValue() {
80 return Integer.valueOf(b);
81 }
82
83 /**
84 * Read needed data (e.g. index) from file.
85 */
86 @Override
87 protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
88 super.setLength(3);
89 b = bytes.readShort();
90 }
91
92 /**
93 * @return mnemonic for instruction
94 */
95 @Override
96 public String toString(final boolean verbose) {
97 return super.toString(verbose) + " " + b;
98 }
99 }