package net.minecraft.network;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.CorruptedFrameException;
import java.util.List;

public class NettyVarint21FrameDecoder extends ByteToMessageDecoder
{
    protected void decode(ChannelHandlerContext p_decode_1_, ByteBuf p_decode_2_, List<Object> p_decode_3_) throws Exception
    {
        p_decode_2_.markReaderIndex();
        byte[] abyte = new byte[3];

        for (int i = 0; i < abyte.length; ++i)
        {
            if (!p_decode_2_.isReadable())
            {
                p_decode_2_.resetReaderIndex();
                return;
            }

            abyte[i] = p_decode_2_.readByte();

            if (abyte[i] >= 0)
            {
                PacketBuffer packetbuffer = new PacketBuffer(Unpooled.wrappedBuffer(abyte));

                try
                {
                    int j = packetbuffer.readVarInt();

                    if (p_decode_2_.readableBytes() >= j)
                    {
                        p_decode_3_.add(p_decode_2_.readBytes(j));
                        return;
                    }

                    p_decode_2_.resetReaderIndex();
                }
                finally
                {
                    packetbuffer.release();
                }

                return;
            }
        }

        throw new CorruptedFrameException("length wider than 21-bit");
    }
}