forked from GeyserMC/Geyser
93 lines
3.2 KiB
Java
93 lines
3.2 KiB
Java
/*
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* Copyright (c) 2019-2020 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.connector.network.translators.world.chunk;
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import com.nukkitx.network.util.Preconditions;
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public class NibbleArray implements Cloneable {
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private final byte[] data;
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public NibbleArray(int length) {
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data = new byte[length / 2];
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}
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public NibbleArray(byte[] array) {
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data = array;
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}
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public byte get(int index) {
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Preconditions.checkElementIndex(index, data.length * 2);
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byte val = data[index / 2];
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if ((index & 1) == 0) {
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return (byte) (val & 0x0f);
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} else {
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return (byte) ((val & 0xf0) >>> 4);
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}
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}
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public void set(int index, byte value) {
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Preconditions.checkArgument(value >= 0 && value < 16, "Nibbles must have a value between 0 and 15.");
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Preconditions.checkElementIndex(index, data.length * 2);
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value &= 0xf;
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int half = index / 2;
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byte previous = data[half];
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if ((index & 1) == 0) {
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data[half] = (byte) (previous & 0xf0 | value);
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} else {
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data[half] = (byte) (previous & 0x0f | value << 4);
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}
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}
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public void fill(byte value) {
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Preconditions.checkArgument(value >= 0 && value < 16, "Nibbles must have a value between 0 and 15.");
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value &= 0xf;
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for (int i = 0; i < data.length; i++) {
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data[i] = (byte) ((value << 4) | value);
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}
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}
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public void copyFrom(byte[] bytes) {
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Preconditions.checkNotNull(bytes, "bytes");
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Preconditions.checkArgument(bytes.length == data.length, "length of provided byte array is %s but expected %s", bytes.length,
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data.length);
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System.arraycopy(bytes, 0, data, 0, data.length);
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}
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public void copyFrom(NibbleArray array) {
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Preconditions.checkNotNull(array, "array");
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copyFrom(array.data);
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}
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public byte[] getData() {
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return data;
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}
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public NibbleArray copy() {
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return new NibbleArray(getData().clone());
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}
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}
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