1 /*
 2  * Copyright (c) 2007, 2025, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package com.sun.tools.classfile;
27 
28 import java.io.IOException;
29 
30 /**
31  *  <p><b>This is NOT part of any supported API.
32  *  If you write code that depends on this, you do so at your own risk.
33  *  This code and its internal interfaces are subject to change or
34  *  deletion without notice.</b>
35  */
36 public class StackMap_attribute extends Attribute {
37     StackMap_attribute(ClassReader cr, int name_index, int length)
38             throws IOException, StackMapTable_attribute.InvalidStackMap {
39         super(name_index, length);
40         number_of_entries = cr.readUnsignedShort();
41         entries = new stack_map_entry[number_of_entries];
42         for (int i = 0; i < number_of_entries; i++)
43             entries[i] = new stack_map_entry(cr);
44     }
45 
46     public StackMap_attribute(ConstantPool constant_pool, stack_map_entry[] entries)
47             throws ConstantPoolException {
48         this(constant_pool.getUTF8Index(Attribute.StackMap), entries);
49     }
50 
51     public StackMap_attribute(int name_index, stack_map_entry[] entries) {
52         super(name_index, StackMapTable_attribute.length(entries));
53         this.number_of_entries = entries.length;
54         this.entries = entries;
55     }
56 
57     public <R, D> R accept(Visitor<R, D> visitor, D data) {
58         return visitor.visitStackMap(this, data);
59     }
60 
61     public final int number_of_entries;
62     public final stack_map_entry entries[];
63 
64     public static class stack_map_entry extends StackMapTable_attribute.full_frame {
65         stack_map_entry(ClassReader cr)
66                 throws IOException, StackMapTable_attribute.InvalidStackMap {
67             super(255, cr);
68         }
69     }
70 }