/*

 * Copyright (c) 1997, 2010, 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.

 */

/*

 * @test

 * @bug 4017728 4079849 6788196

 * @summary Check for correct Array Bounds check in read of FileInputStream and

 * RandomAccessFile

 */

import java.io.*;

/*

 * The test calls the read(byte buf[] , int off , int len) of

 * FileInputStream with different values of off and len to see if the

 * IndexOutOfBoundsException is thrown.  The read(...) method calls

 * readBytes(...) in native code(io_util.c).  The read(...) method in

 * RandomAccessFile also calls the same native method.  So one should

 * see similar results.

 */

public class ReadBytesBounds {

    static final FileInputStream fis;

    static final RandomAccessFile raf;

    static final byte[] b = new byte[32];

    static {

        try {

            String dir = System.getProperty("test.src", ".");

            File testFile = new File(dir, "input.txt");

            fis = new FileInputStream(testFile);

            raf = new RandomAccessFile(testFile , "r");

        } catch (Throwable t) {

            throw new Error(t);

        }

    }

    public static void main(String argv[]) throws Throwable {

        try {

            testRead(-1, -1, false);

            testRead(-1,  0, false);

            testRead( 0, -1, false);

            testRead( 0, 33, false);

            testRead(33,  0, false);

            testRead(33,  4, false);

            testRead( 0, 32, true);

            testRead(32,  0, true);

            testRead(32,  4, false);

            testRead( 4, 16, true);

            testRead( 1, 31, true);

            testRead( 0,  0, true);

            testRead(31,  Integer.MAX_VALUE, false);

            testRead( 0,  Integer.MAX_VALUE, false);

            testRead(-1,  Integer.MAX_VALUE, false);

            testRead(-4,  Integer.MIN_VALUE, false);

            testRead( 0,  Integer.MIN_VALUE, false);

        } finally {

            fis.close();

            raf.close();

        }

    }

    static void testRead(int off, int len, boolean expected) throws Throwable {

        System.err.printf("off=%d len=%d expected=%b%n", off, len, expected);

        boolean result;

        try {

            fis.read(b, off, len);

            raf.read(b, off, len);

            result = true;

        } catch (IndexOutOfBoundsException e) {

            result = false;

        }

        if (result != expected) {

            throw new RuntimeException

                (String.format("Unexpected result off=%d len=%d expected=%b",

                               off, len, expected));

        }

    }

}