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Java > Open Source Codes > org > aspectj > compiler > base > bcg > Asserts


1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  *
3  * This file is part of the compiler and core tools for the AspectJ(tm)
4  * programming language; see http://aspectj.org
5  *
6  * The contents of this file are subject to the Mozilla Public License
7  * Version 1.1 (the "License"); you may not use this file except in
8  * compliance with the License. You may obtain a copy of the License at
9  * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is AspectJ.
17  *
18  * The Initial Developer of the Original Code is Xerox Corporation. Portions
19  * created by Xerox Corporation are Copyright (C) 1999-2002 Xerox Corporation.
20  * All Rights Reserved.
21  *
22  * Contributor(s):
23  */
24
25 package org.aspectj.compiler.base.bcg;
26
27 /** A placeholder class for various bounds checking methods. */
28 abstract public class Asserts {
29
30     public static boolean isByte(int value) {
31         return Byte.MIN_VALUE <= value && value <= Byte.MAX_VALUE;
32     }
33     public static boolean isShort(int value) {
34         return Short.MIN_VALUE <= value && value <= Short.MAX_VALUE;
35     }
36     public static boolean isUByte(int value) {
37         return 0 <= value && value <= 0xFF;
38     }
39     public static boolean isUShort(int value) {
40         return 0 <= value && value <= 0xFFFF;
41     }
42
43     // Can a signed quantity be represented as a U2?
44 public static void assertU2(int nextIndex, String JavaDoc msg) {
45         if (Short.MIN_VALUE <= nextIndex && nextIndex <= Short.MAX_VALUE) return;
46         throw new RuntimeException JavaDoc(msg);
47     }
48
49     // Can an unsigned quantity be represented as a U2?
50 public static void assertUU2(int nextIndex, String JavaDoc msg) {
51         if (isUShort(nextIndex)) return;
52         throw new RuntimeException JavaDoc(msg);
53     }
54
55
56 }
57
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