mirror of
https://github.com/PaperMC/Waterfall.git
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276 lines
10 KiB
Diff
276 lines
10 KiB
Diff
From 5ef37b1ee040906e1b3d31ca110c505d8422145c Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@outlook.com>
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Date: Mon, 14 Mar 2016 15:40:44 -0700
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Subject: [PATCH] Optimize uuid conversions
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Optimizes converting to and from mojang format.
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Manually decode uuids to and from hex.
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diff --git a/api/src/main/java/io/github/waterfallmc/waterfall/utils/Hex.java b/api/src/main/java/io/github/waterfallmc/waterfall/utils/Hex.java
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new file mode 100644
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index 00000000..ece5f798
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--- /dev/null
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+++ b/api/src/main/java/io/github/waterfallmc/waterfall/utils/Hex.java
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@@ -0,0 +1,113 @@
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+package io.github.waterfallmc.waterfall.utils;
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+
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+import java.util.Arrays;
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+import java.util.Objects;
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+
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+public class Hex {
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+
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+ public static byte[] decode(CharSequence chars) {
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+ byte[] bytes = new byte[chars.length() >> 1];
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+ decode(chars, 0, bytes, 0, bytes.length);
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+ return bytes;
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+ }
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+
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+ public static void decode(char[] chars, int charOffset, byte[] dest, int offset, int length) {
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+ decode(new CharSequence() {
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+ @Override
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+ public int length() {
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+ return chars.length;
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+ }
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+
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+ @Override
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+ public char charAt(int index) {
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+ return chars[index];
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+ }
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+
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+ @Override
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+ public CharSequence subSequence(int start, int end) {
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+ return toString().substring(start, end);
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+ }
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+
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+ @Override
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+ public String toString() {
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+ return new String(chars, charOffset, chars.length);
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+ }
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+ });
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+ }
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+
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+ public static void decode(CharSequence chars, int charOffset, byte[] dest, int offset, int length) {
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+ Objects.requireNonNull(chars, "Null chars");
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+ Objects.requireNonNull(chars, "Null destination");
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+ final int numChars = chars.length();
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+ if ((numChars & 0x01) != 0) {
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+ throw new IllegalArgumentException("Odd number of characters: " + numChars);
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+ } else if (length < (numChars - charOffset) >> 1) {
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+ throw new IllegalArgumentException("Too many bytes to fill with " + numChars + " characters: " + length);
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+ } else if (offset < 0 || charOffset < 0 || length < 0 || length * 2 > numChars - charOffset || length > dest.length - offset) {
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+ throw new IndexOutOfBoundsException();
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+ }
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+ for (int i = 0, charIndex = charOffset; i < length; i++) {
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+ char first = chars.charAt(charIndex++);
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+ char second = chars.charAt(charIndex++);
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+ dest[i + offset] = (byte) ((toDigit(first) << 4) | (toDigit(second)));
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+ }
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+ }
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+
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+ public static String encodeString(byte[] bytes) {
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+ return new String(encode(bytes));
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+ }
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+
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+ public static char[] encode(byte[] bytes) {
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+ char[] chars = new char[bytes.length << 1];
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+ encode(chars, 0, bytes, 0, bytes.length);
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+ return chars;
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+ }
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+
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+ public static void encode(char[] chars, int charOffset, byte[] source, int offset, int length) {
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+ Objects.requireNonNull(chars, "Null chars");
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+ Objects.requireNonNull(chars, "Null bytes");
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+ if (offset < 0 || charOffset < 0 || length < 0 || length * 2 > chars.length - charOffset || length > source.length - offset) {
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+ throw new IndexOutOfBoundsException();
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+ } else if (length == 0) {
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+ return;
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+ }
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+ for (int i = 0, charIndex = charOffset; i < length; i++) {
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+ byte b = source[i + offset];
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+ chars[charIndex++] = fromDigit((byte) ((b >> 4) & 0xF));
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+ chars[charIndex++] = fromDigit((byte) (b & 0xF));
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+ }
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+ }
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+ private static final char[] ENCODE_TABLE = new char[]{
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+ '0', '1', '2', '3', '4', '5', '6', '7',
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+ '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
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+ };
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+ private static final byte[] DECODE_TABLE = new byte[128];
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+
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+ static {
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+ Arrays.fill(DECODE_TABLE, (byte) -1);
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+ for (int value = 0; value < ENCODE_TABLE.length; value++) {
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+ char c = ENCODE_TABLE[value];
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+ DECODE_TABLE[c] = (byte) value;
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+ char upper;
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+ if ((upper = Character.toUpperCase(c)) != c) {
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+ DECODE_TABLE[upper] = (byte) value;
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+ }
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+ }
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+ }
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+
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+ public static byte toDigit(char c) {
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+ byte value;
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+ if (c < DECODE_TABLE.length) {
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+ value = DECODE_TABLE[c];
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+ } else {
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+ value = -1;
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+ }
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+ if (value < 0) throw new IllegalArgumentException("Invalid character " + c);
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+ return value;
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+ }
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+
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+ private static char fromDigit(byte b) {
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+ assert (b & 0xF) == b : "Out of range " + b;
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+ return ENCODE_TABLE[b];
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+ }
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+}
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\ No newline at end of file
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diff --git a/api/src/main/java/io/github/waterfallmc/waterfall/utils/UUIDUtils.java b/api/src/main/java/io/github/waterfallmc/waterfall/utils/UUIDUtils.java
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new file mode 100644
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index 00000000..cc24dd35
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--- /dev/null
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+++ b/api/src/main/java/io/github/waterfallmc/waterfall/utils/UUIDUtils.java
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@@ -0,0 +1,74 @@
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+package io.github.waterfallmc.waterfall.utils;
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+import java.util.UUID;
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+
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+import com.google.common.base.Preconditions;
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+import com.google.common.primitives.Longs;
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+
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+public class UUIDUtils {
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+ private UUIDUtils() {}
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+
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+ public static String undash(String id) {
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+ return new StringBuilder( 32 ).append( id, 0, 8 ).append( id, 9, 13 ).append( id, 14, 18 ).append( id, 19, 23 ).append( id, 24, 36 ).toString();
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+ }
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+
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+ public static String toMojangString(UUID id) {
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+ Preconditions.checkNotNull(id, "Null id");
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+ return Hex.encodeString(toBytes(id));
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+ }
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+
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+ public static UUID fromString(String s) {
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+ Preconditions.checkNotNull(s, "Null string");
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+ if (s.length() == 36) { // UUID.toString() uuid
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+ s = UUIDUtils.undash(s);
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+ } else if (s.length() != 32) {
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+ throw new IllegalArgumentException("Invalid UUID: " + s);
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+ }
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+ return fromMojangString0(s);
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+ }
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+
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+ public static UUID fromMojangString(String s) {
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+ Preconditions.checkNotNull(s, "Null string");
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+ if (s.length() != 32) {
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+ throw new IllegalArgumentException("UUID not in mojang format: " + s);
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+ }
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+ return fromMojangString0(s);
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+ }
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+
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+ private static UUID fromMojangString0(String s) {
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+ assert s != null : "Null string";
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+ assert s.length() == 32 : "invalid length: " + s;
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+ try {
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+ return fromBytes(Hex.decode(s));
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+ } catch (IllegalArgumentException e) {
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+ throw new IllegalArgumentException("Invalid UUID: " + s);
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+ }
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+ }
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+
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+ public static byte[] toBytes(UUID id) {
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+ Preconditions.checkNotNull(id, "Null id");
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+ byte[] result = new byte[16];
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+ long lsb = id.getLeastSignificantBits();
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+ for (int i = 15; i >= 8; i--) {
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+ result[i] = (byte) (lsb & 0xffL);
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+ lsb >>= 8;
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+ }
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+ long msb = id.getMostSignificantBits();
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+ for (int i = 7; i >= 0; i--) {
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+ result[i] = (byte) (msb & 0xffL);
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+ msb >>= 8;
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+ }
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+ return result;
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+ }
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+
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+ public static UUID fromBytes(byte[] bytes) {
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+ Preconditions.checkNotNull(bytes, "Null bytes");
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+ if (bytes.length != 16) {
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+ throw new IllegalArgumentException("Invalid length: " + bytes.length);
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+ }
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+ long msb = Longs.fromBytes(bytes[0], bytes[1], bytes[2], bytes[3],
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+ bytes[4], bytes[5], bytes[6], bytes[7]);
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+ long lsb = Longs.fromBytes(bytes[8], bytes[9], bytes[10], bytes[11],
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+ bytes[12], bytes[13], bytes[14], bytes[15]);
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+ return new UUID(msb, lsb);
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+ }
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+}
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\ No newline at end of file
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diff --git a/api/src/main/java/net/md_5/bungee/Util.java b/api/src/main/java/net/md_5/bungee/Util.java
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index 86a00555..6c9c6d61 100644
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--- a/api/src/main/java/net/md_5/bungee/Util.java
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+++ b/api/src/main/java/net/md_5/bungee/Util.java
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@@ -1,11 +1,15 @@
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package net.md_5.bungee;
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import com.google.common.base.Joiner;
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+import com.google.common.primitives.Ints;
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import java.net.InetSocketAddress;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.util.UUID;
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+import io.github.waterfallmc.waterfall.utils.Hex;
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+import io.github.waterfallmc.waterfall.utils.UUIDUtils;
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+
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/**
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* Series of utility classes to perform various operations.
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*/
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@@ -42,7 +46,7 @@ public class Util
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*/
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public static String hex(int i)
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{
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- return String.format( "0x%02X", i );
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+ return Hex.encodeString(Ints.toByteArray(i));
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}
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/**
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@@ -78,6 +82,6 @@ public class Util
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*/
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public static UUID getUUID(String uuid)
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{
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- return UUID.fromString( uuid.substring( 0, 8 ) + "-" + uuid.substring( 8, 12 ) + "-" + uuid.substring( 12, 16 ) + "-" + uuid.substring( 16, 20 ) + "-" + uuid.substring( 20, 32 ) );
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+ return UUIDUtils.fromString(uuid);
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}
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}
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diff --git a/api/src/main/java/net/md_5/bungee/api/ServerPing.java b/api/src/main/java/net/md_5/bungee/api/ServerPing.java
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index 27b51849..8bf17f9c 100644
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--- a/api/src/main/java/net/md_5/bungee/api/ServerPing.java
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+++ b/api/src/main/java/net/md_5/bungee/api/ServerPing.java
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@@ -75,7 +75,7 @@ public class ServerPing
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public String getId()
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{
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- return uniqueId.toString().replaceAll( "-", "" );
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+ return io.github.waterfallmc.waterfall.utils.UUIDUtils.undash( uniqueId.toString() ); // Waterfall
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}
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}
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diff --git a/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java b/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
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index 68aa3f85..616e9ee8 100644
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--- a/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
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+++ b/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
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@@ -601,7 +601,7 @@ public class InitialHandler extends PacketHandler implements PendingConnection
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@Override
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public String getUUID()
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{
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- return uniqueId.toString().replaceAll( "-", "" );
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+ return io.github.waterfallmc.waterfall.utils.UUIDUtils.undash( uniqueId.toString() ); // Waterfall
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}
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@Override
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--
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2.12.0
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