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A char can be 3 bytes (#843)

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Outfluencer 2022-08-20 04:45:58 +02:00 committet von GitHub
Ursprung 4b33d5fb8a
Commit 47cd9faf65
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proxy/src/main/java/com/velocitypowered/proxy/protocol/ProtocolUtils.java
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@ -185,9 +185,9 @@ public enum ProtocolUtils {
private static String readString(ByteBuf buf, int cap, int length) { private static String readString(ByteBuf buf, int cap, int length) {
checkFrame(length >= 0, "Got a negative-length string (%s)", length); checkFrame(length >= 0, "Got a negative-length string (%s)", length);
// `cap` is interpreted as a UTF-8 character length. To cover the full Unicode plane, we must // `cap` is interpreted as a UTF-8 character length. To cover the full Unicode plane, we must
// consider the length of a UTF-8 character, which can be up to 4 bytes. We do an initial // consider the length of a UTF-8 character, which can be up to 3 bytes. We do an initial
// sanity check and then check again to make sure our optimistic guess was good. // sanity check and then check again to make sure our optimistic guess was good.
checkFrame(length <= cap * 4, "Bad string size (got %s, maximum is %s)", length, cap); checkFrame(length <= cap * 3, "Bad string size (got %s, maximum is %s)", length, cap);
checkFrame(buf.isReadable(length), checkFrame(buf.isReadable(length),
"Trying to read a string that is too long (wanted %s, only have %s)", length, "Trying to read a string that is too long (wanted %s, only have %s)", length,
buf.readableBytes()); buf.readableBytes());