forked from GeyserMC/Geyser
105 lines
3.3 KiB
Java
105 lines
3.3 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.utils;
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import io.netty.buffer.ByteBuf;
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import java.nio.charset.StandardCharsets;
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public class NetworkUtils {
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public static String readString(ByteBuf buf) {
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return new String(readByteArray(buf), StandardCharsets.UTF_8);
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}
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public static void writeString(ByteBuf buf, String string) {
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writeByteArray(buf, string.getBytes(StandardCharsets.UTF_8));
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}
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public static byte[] readByteArray(ByteBuf buf) {
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byte[] bytes = new byte[readUnsignedVarInt(buf)];
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buf.readBytes(bytes);
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return bytes;
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}
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public static void writeByteArray(ByteBuf buf, byte[] bytes) {
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writeUnsignedVarInt(buf, bytes.length);
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buf.writeBytes(bytes);
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}
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public static int readVarInt(ByteBuf buf) {
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int i = 0, j = 0;
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while (true) {
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int k = buf.readByte();
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i |= (k & 0x7F) << j++ * 7;
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if (j > 5) {
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throw new RuntimeException("VarInt was too big!");
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}
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if ((k & 0x80) != 128) {
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break;
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}
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}
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return i;
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}
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public static void writeVarInt(ByteBuf buf, int value) {
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while (true) {
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if ((value & 0xFFFFFF80) == 0) {
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buf.writeByte(value);
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return;
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}
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buf.writeByte(value & 0x7F | 0x80);
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value >>>= 7;
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}
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}
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public static int readUnsignedVarInt(ByteBuf buf) {
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int i = 0;
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for (int j = 0; j < 64; j += 7) {
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final byte b = buf.readByte();
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i |= (long) (b & 0x7F) << j;
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if ((b & 0x80) == 0) {
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return i;
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}
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}
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throw new RuntimeException("Varint was too big!");
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}
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public static void writeUnsignedVarInt(ByteBuf buf, int value) {
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long i = value & 0xFFFFFFFFL;
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while (true) {
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if ((i & ~0x7FL) == 0) {
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buf.writeByte((int) i);
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return;
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} else {
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buf.writeByte((byte) ((i & 0x7F) | 0x80));
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i >>>= 7;
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}
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}
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}
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}
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