hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/util/TypeConversion.java

/*
 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package org.graalvm.compiler.core.common.util;

/**
 * Provides low-level value checks and conversion for signed and unsigned values of size 1, 2, and 4
 * bytes.
 */
public class TypeConversion {

    public static boolean isS1(long value) {
        return value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE;
    }

    public static boolean isU1(long value) {
        return value >= 0 && value <= 0xFF;
    }

    public static boolean isS2(long value) {
        return value >= Short.MIN_VALUE && value <= Short.MAX_VALUE;
    }

    public static boolean isU2(long value) {
        return value >= 0 && value <= 0xFFFF;
    }

    public static boolean isS4(long value) {
        return value >= Integer.MIN_VALUE && value <= Integer.MAX_VALUE;
    }

    public static boolean isU4(long value) {
        return value >= 0 && value <= 0xFFFFFFFFL;
    }

    public static byte asS1(long value) {
        assert isS1(value);
        return (byte) value;
    }

    public static byte asU1(long value) {
        assert isU1(value);
        return (byte) value;
    }

    public static short asS2(long value) {
        assert isS2(value);
        return (short) value;
    }

    public static short asU2(long value) {
        assert isU2(value);
        return (short) value;
    }

    public static int asS4(long value) {
        assert isS4(value);
        return (int) value;
    }

    public static int asU4(long value) {
        assert isU4(value);
        return (int) value;
    }
}