com.questdb.std.str.NativeLPSZ Maven / Gradle / Ivy

Go to download

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

QuestDB is High Performance Time Series Database

There is a newer version: 3.3.3

/*******************************************************************************
 *    ___                  _   ____  ____
 *   / _ \ _   _  ___  ___| |_|  _ \| __ )
 *  | | | | | | |/ _ \/ __| __| | | |  _ \
 *  | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *   \__\_\\__,_|\___||___/\__|____/|____/
 *
 * Copyright (C) 2014-2016 Appsicle
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 *
 ******************************************************************************/

package com.questdb.std.str;

import com.questdb.misc.Unsafe;

public class NativeLPSZ extends AbstractCharSequence implements LPSZ {
    private long address;
    private int len;

    @Override
    public long address() {
        return address;
    }

    @Override
    public int length() {
        return len;
    }

    @Override
    public char charAt(int index) {
        return (char) Unsafe.getUnsafe().getByte(address + index);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    public NativeLPSZ of(long address) {
        this.address = address;
        long p = address;
        while (Unsafe.getUnsafe().getByte(p++) != 0) ;
        this.len = (int) (p - address - 1);
        return this;
    }
}