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More bitshifting magic

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This commit is contained in:
Andrew Steinborn 2021-05-06 00:48:19 -04:00
parent 1cef82d54d
commit fb3f21abc6
1 changed files with 4 additions and 5 deletions
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9
proxy/src/main/java/com/velocitypowered/proxy/protocol/ProtocolUtils.java
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@ -120,14 +120,13 @@ public enum ProtocolUtils {
* @param value the integer to write
*/
public static void writeVarInt(ByteBuf buf, int value) {
int bytes = varIntBytes(value);
// Optimization: focus on 1-3 byte VarInts as they are the most common
if (bytes == 1) {
buf.writeByte(value & 0x7f);
} else if (bytes == 2) {
if ((value & (0xFFFFFFFF << 7)) == 0) {
buf.writeByte(value);
} else if ((value & (0xFFFFFFFF << 14)) == 0) {
int w = (value & 0x7F | 0x80) << 8 | (value >>> 7);
buf.writeShort(w);
} else if (bytes == 3) {
} else if ((value & (0xFFFFFFFF << 21)) == 0) {
int w = (value & 0x7F | 0x80) << 16 | ((value >>> 7) & 0x7F | 0x80) << 8 | (value >>> 14);
buf.writeMedium(w);
} else {