io.questdb.std.str.StdoutSink Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of core Show documentation

QuestDB is High Performance Time Series Database

There is a newer version: 5.0.1

/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

package io.questdb.std.str;

import io.questdb.std.Files;
import io.questdb.std.Unsafe;

import java.io.Closeable;

public final class StdoutSink extends AbstractCharSink implements Closeable {

    public static final StdoutSink INSTANCE = new StdoutSink();

    private final long stdout = Files.getStdOutFd();
    private final int bufferCapacity = 1024;
    private final long buffer = Unsafe.malloc(bufferCapacity);
    private final long limit = buffer + bufferCapacity;
    private long ptr = buffer;

    @Override
    public void close() {
        free();
    }

    @Override
    public void flush() {
        int len = (int) (ptr - buffer);
        if (len > 0) {
            Files.append(stdout, buffer, len);
            ptr = buffer;
        }
    }

    @Override
    public CharSink put(CharSequence cs) {
        if (cs != null) {
            for (int i = 0, len = cs.length(); i < len; i++) {
                put(cs.charAt(i));
            }
        }
        return this;
    }

    @Override
    public CharSink put(char[] chars, int start, int len) {
        for (int i = 0; i < len; i++) {
            put(chars[i + start]);
        }
        return this;
    }

    @Override
    public CharSink put(char c) {
        if (ptr == limit) {
            flush();
        }
        Unsafe.getUnsafe().putByte(ptr++, (byte) c);
        return this;
    }

    private void free() {
        Unsafe.free(buffer, bufferCapacity);
    }
}