/// <summary>
/// Initializes a new instance of the <see cref="ProtoDataReader"/> class.
/// </summary>
/// <param name="stream">A <see cref="Stream"/> that represents the stream the <see cref="ProtoDataReader"/> reads from.</param>
public ProtoDataReader(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
this.stream = stream;
this.reader = new ProtoReader(stream, null, null);
this.context = new ProtoReaderContext(this.reader);
ResultReader.ReadResult(this.context);
}
public static bool ReadRecord(ProtoReaderContext context)
{
if (context.ReachedEndOfCurrentResult)
{
return(false);
}
if (context.CurrentFieldHeader == 0)
{
context.EndSubItem();
context.ReachedEndOfCurrentResult = true;
return(false);
}
if (context.Buffers == null)
{
context.Buffers = new ProtoBufDataBuffer[context.Columns.Count];
ProtoBufDataBuffer.Initialize(context.Buffers);
}
else
{
ProtoBufDataBuffer.Clear(context.Buffers);
}
context.StartSubItem();
ReadRecordValues(context);
context.EndSubItem();
context.ReadFieldHeader();
return(true);
}
private static void ReadRecordValues(ProtoReaderContext context)
{
while (context.ReadFieldHeader() != NoneFieldHeader)
{
// Backwards compatibility or unnecessary?
if (context.CurrentFieldHeader > context.Buffers.Length)
{
context.Reader.SkipField();
continue;
}
var columnIndex = context.CurrentFieldHeader - 1;
switch (context.Columns[columnIndex].ProtoDataType)
{
case ProtoDataType.String:
context.Buffers[columnIndex].String = context.Reader.ReadString();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.DateTime:
context.Buffers[columnIndex].DateTime = BclHelpers.ReadDateTime(context.Reader);
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Int:
context.Buffers[columnIndex].Int = context.Reader.ReadInt32();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Long:
context.Buffers[columnIndex].Long = context.Reader.ReadInt64();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Short:
context.Buffers[columnIndex].Short = context.Reader.ReadInt16();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Bool:
context.Buffers[columnIndex].Bool = context.Reader.ReadBoolean();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Byte:
context.Buffers[columnIndex].Byte = context.Reader.ReadByte();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Float:
context.Buffers[columnIndex].Float = context.Reader.ReadSingle();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Double:
context.Buffers[columnIndex].Double = context.Reader.ReadDouble();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Guid:
context.Buffers[columnIndex].Guid = BclHelpers.ReadGuid(context.Reader);
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Char:
context.Buffers[columnIndex].Char = (char)context.Reader.ReadInt16();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.Decimal:
context.Buffers[columnIndex].Decimal = BclHelpers.ReadDecimal(context.Reader);
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.ByteArray:
context.Buffers[columnIndex].ByteArray = ProtoReader.AppendBytes(null, context.Reader);
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.CharArray:
context.Buffers[columnIndex].CharArray = context.Reader.ReadString().ToCharArray();
context.Buffers[columnIndex].IsNull = false;
break;
case ProtoDataType.TimeSpan:
context.Buffers[columnIndex].TimeSpan = BclHelpers.ReadTimeSpan(context.Reader);
context.Buffers[columnIndex].IsNull = false;
break;
}
}
}