/*

 * 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.

 *

 */

/* @test

   @summary Check that BufferedReader/Writer correctly handle small reads

 */

import java.io.*;

public class SmallReads {

    static class OneByteInputStream extends FilterInputStream {

        OneByteInputStream(InputStream in) {

            super(in);

        }

        public int read(byte[] b, int off, int len) throws IOException {

            return in.read(b, off, 1);

        }

    }

    static String enc = "UTF8";

    static String inEnc;

    static String outEnc;

    static int count = 100;

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

        PrintWriter log

            = new PrintWriter(new OutputStreamWriter(System.err), true);

        if (inEnc == null)

            inEnc = enc;

        if (outEnc == null)

            outEnc = enc;

        PipedOutputStream uo = new PipedOutputStream();

        PipedInputStream ui = new PipedInputStream(uo);

        PipedOutputStream co = new PipedOutputStream();

        PipedInputStream ci = new PipedInputStream(co);

        InputStream ci2 = new OneByteInputStream(ci);

        BufferedWriter w = new BufferedWriter(new OutputStreamWriter(co, outEnc));

        BufferedReader r = new BufferedReader(new InputStreamReader(ci2, inEnc));

        Thread t1 = new Thread(new RandomLineSource(uo, w, count, log));

        Thread t2 = new Thread(new LineSink(ui, r, count, log));

        t1.start();

        t2.start();

        t1.join();

        t2.join();

    }

}