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 */ 23 package 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 */ 29 public 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 }