Method Write

csharp/src/Fory/TypeMeta.cs:273–336

(ByteWriter writer)

    internal CompatibleScalarRead? CompatibleScalarRead { get; set; }

    internal void Write(ByteWriter writer)
    {
        byte header = 0;
        if (FieldType.TrackRef)
        {
            header |= 0b1;
        }

        if (FieldType.Nullable)
        {
            header |= 0b10;
        }

        if (FieldId.HasValue)
        {
            short fieldId = FieldId.Value;
            if (fieldId < 0)
            {
                throw new EncodingException("negative field id is invalid");
            }

            int size = fieldId;
            header |= 0b11 << 6;
            if (size >= TypeMetaConstants.FieldNameSizeThreshold)
            {
                header |= 0b0011_1100;
                writer.WriteUInt8(header);
                writer.WriteVarUInt32((uint)(size - TypeMetaConstants.FieldNameSizeThreshold));
            }
            else
            {
                header |= (byte)(size << 2);
                writer.WriteUInt8(header);
            }

            FieldType.Write(writer, false);
            return;
        }

        string snakeName = TypeMetaUtils.LowerCamelToLowerUnderscore(FieldName);
        MetaString encoded = MetaStringEncoder.FieldName.Encode(snakeName, TypeMetaEncodings.FieldNameMetaStringEncodings);
        int encodingIndex = Array.IndexOf(TypeMetaEncodings.FieldNameMetaStringEncodings, encoded.Encoding);
        if (encodingIndex < 0)
        {
            throw new EncodingException("unsupported field name encoding");
        }

        int encodedSize = encoded.Bytes.Length - 1;
        header |= (byte)(encodingIndex << 6);
        if (encodedSize >= TypeMetaConstants.FieldNameSizeThreshold)
        {
            header |= 0b0011_1100;
            writer.WriteUInt8(header);
            writer.WriteVarUInt32((uint)(encodedSize - TypeMetaConstants.FieldNameSizeThreshold));
        }
        else
        {
            header |= (byte)(encodedSize << 2);