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