internal static Row ReadCurrentRow(DataReader reader, int version, RowLayout layout)
{
if (version < 1)
{
throw new ArgumentOutOfRangeException(nameof(version));
}
if (version > 4)
{
throw new NotSupportedException("Version not supported!");
}
var dataStart = reader.BaseStream.Position;
var dataSize = reader.Read7BitEncodedInt32();
if (dataSize == 0)
{
return(null);
}
var values = new object[layout.FieldCount];
for (var i = 0; i < layout.FieldCount; i++)
{
var field = layout[i];
var dataType = field.DataType;
switch (dataType)
{
case DataType.Binary:
if (version >= 3)
{
values[i] = reader.ReadBytes();
}
else
{
var size = reader.ReadInt32();
values[i] = reader.ReadBytes(size);
}
break;
case DataType.Bool:
values[i] = reader.ReadBool();
break;
case DataType.DateTime:
values[i] = new DateTime(reader.ReadInt64(), field.DateTimeKind);
break;
case DataType.TimeSpan:
values[i] = new TimeSpan(reader.ReadInt64());
break;
case DataType.Int8:
values[i] = reader.ReadInt8();
break;
case DataType.Int16:
values[i] = reader.ReadInt16();
break;
case DataType.Int32:
if (version == 1)
{
values[i] = reader.ReadInt32();
break;
}
values[i] = reader.Read7BitEncodedInt32();
break;
case DataType.Int64:
if (version == 1)
{
values[i] = reader.ReadInt64();
break;
}
values[i] = reader.Read7BitEncodedInt64();
break;
case DataType.UInt32:
if (version == 1)
{
values[i] = reader.ReadUInt32();
break;
}
values[i] = reader.Read7BitEncodedUInt32();
break;
case DataType.UInt64:
if (version == 1)
{
values[i] = reader.ReadUInt64();
break;
}
values[i] = reader.Read7BitEncodedUInt64();
break;
case DataType.UInt8:
values[i] = reader.ReadUInt8();
break;
case DataType.UInt16:
values[i] = reader.ReadUInt16();
break;
case DataType.Char:
values[i] = reader.ReadChar();
break;
case DataType.Single:
values[i] = reader.ReadSingle();
break;
case DataType.Double:
values[i] = reader.ReadDouble();
break;
case DataType.Decimal:
values[i] = reader.ReadDecimal();
break;
case DataType.String:
values[i] = reader.ReadString();
break;
case DataType.Enum:
values[i] = layout.EnumValue(i, reader.Read7BitEncodedInt64());
break;
case DataType.User:
values[i] = layout.ParseValue(i, reader.ReadString(), null);
break;
default: throw new NotImplementedException($"Datatype {dataType} not implemented!");
}
}
var skip = dataStart + dataSize - reader.BaseStream.Position;
if (skip < 0)
{
throw new FormatException();
}
if (skip > 0)
{
reader.BaseStream.Seek(skip, SeekOrigin.Current);
}
return(new Row(layout, values, false));
}