인프런 커뮤니티 질문&답변

	class PlayerInfoReq : Packet
	{
		public long playerId;
		public string playerName;
		public string nickName;

		public PlayerInfoReq()
		{
			packetId = (ushort)PacketID.PlayerInfoReq;
		}

		public override ArraySegment<byte> Write()
		{
			ArraySegment<byte> segment = SendBufferHelper.Open(4096);

			ushort count = 0;
			bool success = true;

			Span<byte> span = new Span<byte>(segment.Array, segment.Offset, segment.Count);

			count += sizeof(ushort);
			success &= BitConverter.TryWriteBytes(span.Slice(count, span.Length - count), packetId);
			count += sizeof(ushort);
			success &= BitConverter.TryWriteBytes(span.Slice(count, span.Length - count), playerId);
			count += sizeof(long);


			ushort nameLen = (ushort)Encoding.Unicode.GetByteCount(playerName);
			success &= BitConverter.TryWriteBytes(span.Slice(count, span.Length - count), nameLen);
			count += sizeof(ushort);
			Array.Copy(Encoding.Unicode.GetBytes(playerName), 0, segment.Array, count, nameLen);
			count += nameLen;

			nameLen = (ushort)Encoding.Unicode.GetBytes(nickName, 0, nickName.Length, segment.Array, segment.Offset + count + sizeof(ushort));
			success &= BitConverter.TryWriteBytes(span.Slice(count, span.Length - count), nameLen);
			count += sizeof(ushort);
			count += nameLen;

			success &= BitConverter.TryWriteBytes(span, count);

			if (!success)
				return null;

			return SendBufferHelper.Close(count);
		}

		public override void Read(ArraySegment<byte> segment)
		{
			ushort count = 0;
			count += sizeof(ushort);
			count += sizeof(ushort);

			ReadOnlySpan<byte> span = new ReadOnlySpan<byte>(segment.Array, segment.Offset, segment.Count);
			playerId = BitConverter.ToInt64(span.Slice(count, span.Length - count));
			count += sizeof(long);


			ushort nameLen = BitConverter.ToUInt16(span.Slice(count, span.Length - count));
			count += sizeof(ushort);
			playerName = Encoding.Unicode.GetString(span.Slice(count, nameLen));
			count += nameLen;

			nameLen = BitConverter.ToUInt16(span.Slice(count, span.Length - count));
			count += sizeof(ushort);
			nickName = Encoding.Unicode.GetString(span.Slice(count, nameLen));
			count += nameLen;
		}
	}