/*

 * Copyright (c) 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.

 *

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 */

/*

 * @test

 * @summary Verify behaviour of Unsafe.get/putByte

 * @library /testlibrary

 * @run main GetPutByte

 */

import java.lang.reflect.Field;

import com.oracle.java.testlibrary.*;

import sun.misc.Unsafe;

import static com.oracle.java.testlibrary.Asserts.*;

public class GetPutByte {

    public static void main(String args[]) throws Exception {

        Unsafe unsafe = Utils.getUnsafe();

        Test t = new Test();

        Field field = Test.class.getField("b");

        int offset = unsafe.fieldOffset(field);

        assertEquals((byte)0, unsafe.getByte(t, offset));

        unsafe.putByte(t, offset, (byte)1);

        assertEquals((byte)1, unsafe.getByte(t, offset));

        long address = unsafe.allocateMemory(8);

        unsafe.putByte(address, (byte)2);

        assertEquals((byte)2, unsafe.getByte(address));

        unsafe.freeMemory(address);

        byte arrayByte[] = { -1, 0, 1, 2 };

        int scale = unsafe.arrayIndexScale(arrayByte.getClass());

        offset = unsafe.arrayBaseOffset(arrayByte.getClass());

        for (int i = 0; i < arrayByte.length; i++) {

            assertEquals(unsafe.getByte(arrayByte, offset), arrayByte[i]);

            offset += scale;

        }

    }

    static class Test {

        public byte b = 0;

    }

}