1 /*
 2  * Copyright (c) 1996, 2018, 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.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 package org.openjdk.asmtools.jdis;
24 
25 import java.io.DataInputStream;
26 import java.io.IOException;
27 
28 /**
29  * Exception table entry (JVMS 4.7.3 The Code Attribute) describes one exception handler
30  * in the code array {@link CodeData}.
31  */
32 class TrapData {
33 
34     int num;
35 
36     // exception_table
37     int start_pc,       // u2
38         end_pc,         // u2
39         handler_pc,     // u2
40         catch_cpx;      // u2
41 
42     public TrapData(DataInputStream in, int num) throws IOException {
43         this.num = num;
44         start_pc = in.readUnsignedShort();
45         end_pc = in.readUnsignedShort();
46         handler_pc = in.readUnsignedShort();
47         catch_cpx = in.readUnsignedShort();
48     }
49 
50     /* returns recommended identifier
51      */
52     public String ident() {
53         return "t" + num;
54     }
55 }