TypeConversion.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2015, 2015, 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 */
23package org.graalvm.compiler.core.common.util;
24
25/**
26 * Provides low-level value checks and conversion for signed and unsigned values of size 1, 2, and 4
27 * bytes.
28 */
29public class TypeConversion {
30
31    public static boolean isS1(long value) {
32        return value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE;
33    }
34
35    public static boolean isU1(long value) {
36        return value >= 0 && value <= 0xFF;
37    }
38
39    public static boolean isS2(long value) {
40        return value >= Short.MIN_VALUE && value <= Short.MAX_VALUE;
41    }
42
43    public static boolean isU2(long value) {
44        return value >= 0 && value <= 0xFFFF;
45    }
46
47    public static boolean isS4(long value) {
48        return value >= Integer.MIN_VALUE && value <= Integer.MAX_VALUE;
49    }
50
51    public static boolean isU4(long value) {
52        return value >= 0 && value <= 0xFFFFFFFFL;
53    }
54
55    public static byte asS1(long value) {
56        assert isS1(value);
57        return (byte) value;
58    }
59
60    public static byte asU1(long value) {
61        assert isU1(value);
62        return (byte) value;
63    }
64
65    public static short asS2(long value) {
66        assert isS2(value);
67        return (short) value;
68    }
69
70    public static short asU2(long value) {
71        assert isU2(value);
72        return (short) value;
73    }
74
75    public static int asS4(long value) {
76        assert isS4(value);
77        return (int) value;
78    }
79
80    public static int asU4(long value) {
81        assert isU4(value);
82        return (int) value;
83    }
84}
85