/*
 * Copyright (c) 2018, Oracle America, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 *  * Neither the name of Oracle nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.openjdk;

import org.openjdk.jmh.annotations.*; 
import org.openjdk.jmh.infra.Blackhole;

import java.io.*;

import java.nio.*;
import java.nio.charset.*;
import static java.nio.charset.StandardCharsets.UTF_8;

import java.util.*;
import java.util.concurrent.*;
import java.util.jar.*;
import java.util.stream.*;
import java.util.zip.*;
import java.time.*;

import javax.mail.internet.MimeUtility;
import javax.mail.MessagingException;

@State(Scope.Benchmark)
@BenchmarkMode(Mode.AverageTime)
//@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Warmup(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Fork(2)

public class CoderResultBM {
    
    private static byte[][] malformedUTF8 = new byte[][] {
        // malformed 1
        new byte[] { 'a', 'b', 'c', (byte)0xc0, },
        // malformed 2
        new byte[] { 'a', 'b', 'c', (byte)0xc2, (byte)0xcc },
        // malformed 3
        new byte[] { 'a', 'b', 'c', (byte)0xe0, (byte)0xa0, (byte)0xcc },
        new byte[] { 'a', 'b', 'c', (byte)0xf0, (byte)0x90, (byte)0x80, (byte)0xcc },
    };

    private static char[][] unmappableMS932 = new char[][] {
        new char[] { 'a', 'b', 'c', (char)0xfd },
        new char[] { 'a', 'b', 'c', (char)0xe0, 0x20 },
    };

    private static Random r = new Random();

    private static Charset MS932;

    @Setup
    public void setup() throws Throwable {
        MS932 = Charset.forName("MS932");
    }

    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    private CoderResult decodeUTF8(Blackhole bh) {
        ByteBuffer bb = ByteBuffer.wrap(malformedUTF8[r.nextInt(4)]);
        CharBuffer cb = CharBuffer.allocate(10);
        CoderResult cr = null;
        for (int i = 0; i < 100; i++) {
            bb.rewind();
            cb.clear();
            cr = UTF_8.newDecoder().decode(bb, cb, true);
            bh.consume(cr);
	}
        return cr;
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(1)
    public CoderResult decodeUTF8_t1(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(5)
    public CoderResult decodeUTF8_t5(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(10)
    public CoderResult decodeUTF8_t10(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(20)
    public CoderResult decodeUTF8_t20(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(30)
    public CoderResult decodeUTF8_t30(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(50)
    public CoderResult decodeUTF8_t50(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(100)
    public CoderResult decodeUTF8_t100(Blackhole bh) {
        return decodeUTF8(bh);
    }

    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    private CoderResult encodeMS932(Blackhole bh) {
        CharBuffer cb = CharBuffer.wrap(unmappableMS932[r.nextInt(2)]);
        ByteBuffer bb = ByteBuffer.allocate(10);
        CoderResult cr = null;
        for (int i = 0; i < 100; i++) {
            bb.rewind();
            cb.clear();
            cr = MS932.newEncoder().encode(cb, bb, true);
            bh.consume(cr);
	}
        return cr;
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(1)
    public CoderResult encodeMS932_t1(Blackhole bh) {
        return encodeMS932(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(10)
    public CoderResult encodeMS932_t10(Blackhole bh) {
        return encodeMS932(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(50)
    public CoderResult encodeMS932_t50(Blackhole bh) {
        return encodeMS932(bh);
    }

    @Benchmark
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    @Threads(100)
    public CoderResult encodeMS932_t100(Blackhole bh) {
        return encodeMS932(bh);
    }

}