/*

 * Copyright (c) 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 4821286

 * @summary Check correctness of CharsetEncoder.isLegalReplacement(byte[])

 */

import java.io.*;

import java.nio.*;

import java.nio.charset.*;

import java.util.*;

public class IsLegalReplacement {

    static PrintStream out = System.err;

    static int errors = 0;

    static String toString(byte[] ba) {

        StringBuffer sb = new StringBuffer();

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

            byte b = ba[i];

            if (i > 0)

                sb.append(' ');

            sb.append(Integer.toHexString((b >> 4) & 0xf));

            sb.append(Integer.toHexString((b >> 0) & 0xf));

        }

        return sb.toString();

    }

    static CoderResult ilr(String csn, byte[] repl) {

        CharsetDecoder dec = Charset.forName(csn).newDecoder();

        dec.onMalformedInput(CodingErrorAction.REPORT);

        dec.onUnmappableCharacter(CodingErrorAction.REPORT);

        ByteBuffer bb = ByteBuffer.wrap(repl);

        CharBuffer cb = CharBuffer.allocate((int)(bb.remaining()

                                                  * dec.maxCharsPerByte()));

        return dec.decode(bb, cb, true);

    }

    static void test(String csn, byte[] repl, boolean expected)

        throws Exception

    {

        CharsetEncoder enc = Charset.forName(csn).newEncoder();

        out.print(csn + ": " + toString(repl) + ": ");

        if (enc.isLegalReplacement(repl) == expected) {

            out.print("Okay");

        } else {

            out.print("Wrong: Expected " + expected);

            errors++;

        }

        out.println(" (" + ilr(csn, repl) + ")");

    }

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

        test("UTF-16", new byte [] { (byte)0xd8, 0, (byte)0xdc, 0 }, true);

        test("UTF-16", new byte [] { (byte)0xdc, 0, (byte)0xd8, 0 }, false);

        test("UTF-16", new byte [] { (byte)0xd8, 0 }, false);

        test("UTF-16BE", new byte [] { (byte)0xd8, 0, (byte)0xdc, 0 }, true);

        test("UTF-16BE", new byte [] { (byte)0xdc, 0, (byte)0xd8, 0 }, false);

        test("UTF-16BE", new byte [] { (byte)0xd8, 0 }, false);

        test("UTF-16LE", new byte [] { 0, (byte)0xd8, 0, (byte)0xdc }, true);

        test("UTF-16LE", new byte [] { 0, (byte)0xdc, 0, (byte)0xd8 }, false);

        test("UTF-16LE", new byte [] { 0, (byte)0xd8 }, false);

        if (errors > 0)

            throw new Exception(errors + " error(s) occurred");

    }

}