mirror of https://github.com/GeyserMC/Geyser.git
663 lines
13 KiB
Java
663 lines
13 KiB
Java
package org.geysermc.connector.utils;
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import com.flowpowered.math.vector.Vector2i;
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import com.flowpowered.math.vector.Vector3d;
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import com.flowpowered.math.vector.Vector3i;
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import io.netty.buffer.ByteBuf;
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import io.netty.handler.codec.DecoderException;
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import java.lang.reflect.Array;
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import java.text.MessageFormat;
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import java.util.List;
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import java.util.UUID;
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import java.util.function.*;
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public class GeyserUtils {
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public static final int FLAG_RUNTIME = 1;
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public static final int GLOBAL_PALETTE_BITS_PER_BLOCK = 14;
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public static final int SECTION_COUNT_BLOCKS = 16;
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public static final int SECTION_COUNT_LIGHT = 18;
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public static final int BLOCKS_IN_SECTION = 16 * 16 * 16;
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public static final int LIGHT_DATA_LENGTH = BLOCKS_IN_SECTION / 2;
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public static final int EMPTY_SUBCHUNK_BYTES = BLOCKS_IN_SECTION / 8;
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public static final int SUBCHUNK_VERSION = 8;
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public static void writeEmpty(ByteBuf to) {
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to.writeByte(storageHeader(1));
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to.writeZero(EMPTY_SUBCHUNK_BYTES);
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}
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protected static final int storageHeader(int bitsPerBlock) {
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return (bitsPerBlock << 1) | FLAG_RUNTIME;
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}
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public static void writeEmptySubChunk(ByteBuf out) {
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out.writeBytes(new byte[4096 + 4096]);
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}
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public static void skipPosition(ByteBuf from) {
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from.skipBytes(Long.BYTES);
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}
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public static Vector3d readPosition(ByteBuf from) {
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long l = from.readLong();
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return new Vector3d(
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(int) (l >> 38), (int) (l & 0xFFF), (int) ((l << 26) >> 38)
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);
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}
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public static void readPEPosition(ByteBuf from) {
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readSVarInt(from);
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readVarInt(from);
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readSVarInt(from);
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}
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public static Vector3d readLegacyPositionI(ByteBuf from) {
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return new Vector3d(from.readInt(), from.readInt(), from.readInt());
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}
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public static void writePosition(ByteBuf to, Vector3i position) {
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to.writeLong(((position.getX() & 0x3FFFFFFL) << 38) | ((position.getZ() & 0x3FFFFFFL) << 12) | (position.getY() & 0xFFFL));
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}
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public static void writeLegacyPositionL(ByteBuf to, Vector3d position) {
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to.writeLong((((int) position.getX() & 0x3FFFFFFL) << 38) | (((int) position.getY() & 0xFFFL) << 26) | ((int) position.getZ() & 0x3FFFFFFL));
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}
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public static void writePEPosition(ByteBuf to, Vector3d position) {
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writeSVarInt(to, (int) position.getX());
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writeVarInt(to, (int) position.getY());
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writeSVarInt(to, (int) position.getZ());
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}
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public static void writeLegacyPositionB(ByteBuf to, Vector3d position) {
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to.writeInt((int) position.getX());
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to.writeByte((int) position.getY());
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to.writeInt((int) position.getZ());
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}
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public static void writeLegacyPositionS(ByteBuf to, Vector3d position) {
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to.writeInt((int) position.getX());
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to.writeShort((int) position.getY());
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to.writeInt((int) position.getZ());
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}
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public static void writeLegacyPositionI(ByteBuf to, Vector3d position) {
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to.writeInt((int) position.getX());
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to.writeInt((int) position.getY());
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to.writeInt((int) position.getZ());
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}
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public static Vector2i readIntChunkCoord(ByteBuf from) {
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return new Vector2i(from.readInt(), from.readInt());
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}
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public static Vector2i readVarIntChunkCoord(ByteBuf from) {
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return new Vector2i(readVarInt(from), readVarInt(from));
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}
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public static void writeIntChunkCoord(ByteBuf to, Vector2i chunk) {
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to.writeInt(chunk.getX());
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to.writeInt(chunk.getY());
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}
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public static Vector2i readPEChunkCoord(ByteBuf from) {
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return new Vector2i(readSVarInt(from), readSVarInt(from));
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}
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public static void writePEChunkCoord(ByteBuf to, Vector2i chunk) {
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writeSVarInt(to, chunk.getX());
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writeSVarInt(to, chunk.getY());
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}
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public static int readLocalCoord(ByteBuf from) {
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return from.readUnsignedShort();
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}
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public static void writeLocalCoord(ByteBuf to, int coord) {
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to.writeShort(coord);
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}
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public static void writeVarIntChunkCoord(ByteBuf to, Vector2i chunk) {
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writeVarInt(to, chunk.getX());
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writeVarInt(to, chunk.getY());
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}
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public static final int MAX_LENGTH = 5;
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public static void writeFixedSizeVarInt(ByteBuf to, int i) {
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int writerIndex = to.writerIndex();
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while ((i & 0xFFFFFF80) != 0x0) {
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to.writeByte(i | 0x80);
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i >>>= 7;
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}
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int paddingBytes = MAX_LENGTH - (to.writerIndex() - writerIndex) - 1;
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if (paddingBytes == 0) {
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to.writeByte(i);
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} else {
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to.writeByte(i | 0x80);
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while (--paddingBytes > 0) {
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to.writeByte(0x80);
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}
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to.writeByte(0);
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}
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}
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public static int readVarInt(ByteBuf from) {
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int value = 0;
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int length = 0;
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byte part;
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do {
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part = from.readByte();
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value |= (part & 0x7F) << (length++ * 7);
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if (length > MAX_LENGTH) {
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throw new DecoderException("VarInt too big");
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}
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} while (part < 0);
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return value;
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}
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public static void writeVarInt(ByteBuf to, int i) {
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while ((i & 0xFFFFFF80) != 0x0) {
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to.writeByte(i | 0x80);
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i >>>= 7;
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}
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to.writeByte(i);
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}
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public static int readSVarInt(ByteBuf from) {
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int varint = readVarInt(from);
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return (varint >> 1) ^ -(varint & 1);
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}
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public static void writeSVarInt(ByteBuf to, int varint) {
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writeVarInt(to, (varint << 1) ^ (varint >> 31));
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}
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public static long readVarLong(ByteBuf from) {
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long varlong = 0L;
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int length = 0;
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byte part;
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do {
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part = from.readByte();
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varlong |= (part & 0x7F) << (length++ * 7);
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if (length > 10) {
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throw new RuntimeException("VarLong too big");
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}
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} while ((part & 0x80) == 0x80);
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return varlong;
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}
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public static void writeVarLong(ByteBuf to, long varlong) {
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while ((varlong & 0xFFFFFFFFFFFFFF80L) != 0x0L) {
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to.writeByte((int) (varlong & 0x7FL) | 0x80);
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varlong >>>= 7;
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}
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to.writeByte((int) varlong);
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}
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public static long readSVarLong(ByteBuf from) {
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long varlong = readVarLong(from);
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return (varlong >> 1) ^ -(varlong & 1);
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}
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public static void writeSVarLong(ByteBuf to, long varlong) {
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writeVarLong(to, (varlong << 1) ^ (varlong >> 63));
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}
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public static ByteBuf readShortByteArraySlice(ByteBuf from, int limit) {
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int length = from.readShort();
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checkLimit(length, limit);
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return from.readSlice(length);
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}
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@SuppressWarnings("unchecked")
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public static <T> T[] readShortTArray(ByteBuf from, Class<T> tclass, Function<ByteBuf, T> elementReader) {
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T[] array = (T[]) Array.newInstance(tclass, from.readShort());
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for (int i = 0; i < array.length; i++) {
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array[i] = elementReader.apply(from);
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}
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return array;
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}
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public static byte[] readVarIntByteArray(ByteBuf from) {
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return readBytes(from, readVarInt(from));
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}
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public static ByteBuf readVarIntByteArraySlice(ByteBuf from, int limit) {
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int length = readVarInt(from);
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checkLimit(length, limit);
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return from.readSlice(length);
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}
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public static ByteBuf readVarIntByteArraySlice(ByteBuf from) {
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return from.readSlice(readVarInt(from));
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}
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@SuppressWarnings("unchecked")
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public static <T> T[] readVarIntTArray(ByteBuf from, Class<T> tclass, Function<ByteBuf, T> elementReader) {
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T[] array = (T[]) Array.newInstance(tclass, readVarInt(from));
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for (int i = 0; i < array.length; i++) {
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array[i] = elementReader.apply(from);
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}
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return array;
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}
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public static int[] readVarIntVarIntArray(ByteBuf from) {
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int[] array = new int[readVarInt(from)];
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for (int i = 0; i < array.length; i++) {
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array[i] = readVarInt(from);
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}
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return array;
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}
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public static void writeShortByteArray(ByteBuf to, ByteBuf data) {
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to.writeShort(data.readableBytes());
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to.writeBytes(data);
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}
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public static void writeShortByteArray(ByteBuf to, byte[] data) {
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to.writeShort(data.length);
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to.writeBytes(data);
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}
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public static void writeShortByteArray(ByteBuf to, Consumer<ByteBuf> dataWriter) {
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writeLengthPrefixedBytes(to, (lTo, length) -> lTo.writeShort(length), dataWriter);
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}
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public static <T> void writeShortTArray(ByteBuf to, T[] array, BiConsumer<ByteBuf, T> elementWriter) {
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to.writeShort(array.length);
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for (T element : array) {
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elementWriter.accept(to, element);
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}
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}
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public static void writeVarIntByteArray(ByteBuf to, ByteBuf data) {
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writeVarInt(to, data.readableBytes());
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to.writeBytes(data);
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}
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public static void writeVarIntByteArray(ByteBuf to, byte[] data) {
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writeVarInt(to, data.length);
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to.writeBytes(data);
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}
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public static void writeVarIntByteArray(ByteBuf to, Consumer<ByteBuf> dataWriter) {
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writeLengthPrefixedBytes(to, GeyserUtils::writeFixedSizeVarInt, dataWriter);
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}
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public static void writeVarIntTArray(ByteBuf to, ToIntFunction<ByteBuf> arrayWriter) {
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writeSizePrefixedData(to, GeyserUtils::writeFixedSizeVarInt, arrayWriter);
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}
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public static <T> void writeVarIntTArray(ByteBuf to, T[] array, BiConsumer<ByteBuf, T> elementWriter) {
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writeVarInt(to, array.length);
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for (T element : array) {
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elementWriter.accept(to, element);
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}
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}
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public static <T> void writeVarIntTArray(ByteBuf to, List<T> array, BiConsumer<ByteBuf, T> elementWriter) {
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writeVarInt(to, array.size());
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for (T element : array) {
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elementWriter.accept(to, element);
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}
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}
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public static void writeVarIntEnum(ByteBuf to, Enum<?> e) {
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writeVarInt(to, e.ordinal());
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}
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public static void writeByteEnum(ByteBuf to, Enum<?> e) {
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to.writeByte(e.ordinal());
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}
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public static UUID readUUID(ByteBuf from) {
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return new UUID(from.readLong(), from.readLong());
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}
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public static void writeUUID(ByteBuf to, UUID uuid) {
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to.writeLong(uuid.getMostSignificantBits());
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to.writeLong(uuid.getLeastSignificantBits());
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}
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public static void writePEUUID(ByteBuf to, UUID uuid) {
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to.writeLongLE(uuid.getMostSignificantBits());
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to.writeLongLE(uuid.getLeastSignificantBits());
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}
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public static byte[] readAllBytes(ByteBuf buf) {
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return readBytes(buf, buf.readableBytes());
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}
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public static ByteBuf readAllBytesSlice(ByteBuf from) {
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return from.readSlice(from.readableBytes());
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}
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public static ByteBuf readAllBytesSlice(ByteBuf buf, int limit) {
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checkLimit(buf.readableBytes(), limit);
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return readAllBytesSlice(buf);
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}
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public static byte[] readBytes(ByteBuf buf, int length) {
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byte[] result = new byte[length];
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buf.readBytes(result);
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return result;
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}
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protected static void checkLimit(int length, int limit) {
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if (length > limit) {
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throw new DecoderException(MessageFormat.format("Size {0} is bigger than allowed {1}", length, limit));
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}
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}
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public static void writeLengthPrefixedBytes(ByteBuf to, ObjIntConsumer<ByteBuf> lengthWriter, Consumer<ByteBuf> dataWriter) {
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int lengthWriterIndex = to.writerIndex();
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lengthWriter.accept(to, 0);
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int writerIndexDataStart = to.writerIndex();
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dataWriter.accept(to);
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int writerIndexDataEnd = to.writerIndex();
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to.writerIndex(lengthWriterIndex);
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lengthWriter.accept(to, writerIndexDataEnd - writerIndexDataStart);
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to.writerIndex(writerIndexDataEnd);
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}
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public static void writeSizePrefixedData(ByteBuf to, ObjIntConsumer<ByteBuf> sizeWriter, ToIntFunction<ByteBuf> dataWriter) {
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int sizeWriterIndex = to.writerIndex();
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sizeWriter.accept(to, 0);
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int size = dataWriter.applyAsInt(to);
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int writerIndexDataEnd = to.writerIndex();
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to.writerIndex(sizeWriterIndex);
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sizeWriter.accept(to, size);
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to.writerIndex(writerIndexDataEnd);
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}
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private static int getAnvilIndex(int x, int y, int z) {
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return (y << 8) + (z << 4) + x;
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}
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public static <T> boolean instanceOf(Class<T> clazz, Object o) {
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try {
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T t = (T) o;
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return true;
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} catch (Exception e) {
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return false;
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}
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}
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}
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