(C# : Server) 29. Serialization - 3

Posted by : C# at Sep 24, 2021

Get Code

현재는 아래와 같이 고정된 데이터를 넘기지만 가변의 데이터를 어떻게 처리하는지 알아보자

// ...

class PlayerInfoReq : Packet
{
    public long playerId;

    // ...

우선 약간의 코드정리를 해보자

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

    ushort size = 0;
    bool success = true;

    // Span을 이용
    Span<byte> s = new Span<byte>(segment.Array, segment.Offset, segment.Count);

    size += sizeof(ushort);
    success &= BitConverter.TryWriteBytes(s.Slice(size, s.Length - size), this.packetId);
    size += sizeof(ushort);
    success &= BitConverter.TryWriteBytes(s.Slice(size, s.Length - size), this.playerId);
    size += sizeof(long);
    success &= BitConverter.TryWriteBytes(s, size);

    if (success == false)
        return null;

    return SendBufferHelper.Close(size);
}

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

    ReadOnlySpan<byte> s = new ReadOnlySpan<byte>(segment.Array, segment.Offset, segment.Count);

    count += 2; // size
    count += 2; // id
    this.playerId = BitConverter.ToInt64(s.Slice(count, s.Length - count));
    count += 8;
}

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

    ushort size = 0;
    bool success = true;

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

    size += sizeof(ushort);
    success &= BitConverter.TryWriteBytes(s.Slice(size, s.Length - size), this.packetId);
    size += sizeof(ushort);
    success &= BitConverter.TryWriteBytes(s.Slice(size, s.Length - size), this.playerId);
    size += sizeof(long);

    // string
    // string의 len을 먼저보내고 내용을 byte로 보내자
    ushort nameLen = (ushort)Encoding.Unicode.GetByteCount(this.name);
    success &= BitConverter.TryWriteBytes(s.Slice(size, s.Length - size), nameLen);
    size += sizeof(ushort);
    Array.Copy(Encoding.Unicode.GetBytes(this.name), 0, segment.Array, size, nameLen);
    size += nameLen;

    success &= BitConverter.TryWriteBytes(s, size);

    // ...

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

    ReadOnlySpan<byte> s = new ReadOnlySpan<byte>(segment.Array, segment.Offset, segment.Count);

    count += sizeof(ushort); // size
    count += sizeof(ushort); // id
    this.playerId = BitConverter.ToInt64(s.Slice(count, s.Length - count));
    count += sizeof(long);

    // string
    ushort nameLen = (ushort)BitConverter.ToInt64(s.Slice(count, s.Length - count));
    count += sizeof(ushort);
    this.name = Encoding.Unicode.GetString(s.Slice(count, nameLen));
}