/// <summary>
/// Deflate the token
/// </summary>
/// <param name="destination">Stream to deflate token to</param>
public override void Deflate(Stream destination)
{
destination.WriteByte((byte)TDSTokenType.ReturnValue);
TDSUtilities.WriteUShort(destination, ParamOrdinal);
destination.WriteByte((byte)ParamName.Length);
TDSUtilities.WriteString(destination, ParamName);
destination.WriteByte((byte)Status);
TDSUtilities.WriteUInt(destination, UserType);
TDSUtilities.WriteUShort(destination, Flags.ToUShort());
// Write type
destination.WriteByte((byte)DataType);
// Dispatch further writing based on the type
switch (DataType)
{
case TDSDataType.Binary:
case TDSDataType.VarBinary:
case TDSDataType.Char:
case TDSDataType.VarChar:
case TDSDataType.BitN:
case TDSDataType.Guid:
case TDSDataType.IntN:
case TDSDataType.MoneyN:
case TDSDataType.FloatN:
case TDSDataType.DateTimeN:
{
// Byte length
destination.WriteByte((byte)DataTypeSpecific);
break;
}
case TDSDataType.DateN:
{
// No details
break;
}
case TDSDataType.TimeN:
case TDSDataType.DateTime2N:
case TDSDataType.DateTimeOffsetN:
{
// Scale
destination.WriteByte((byte)DataTypeSpecific);
break;
}
case TDSDataType.DecimalN:
case TDSDataType.NumericN:
{
// Cast to type-specific information
TDSDecimalColumnSpecific typeSpecific = DataTypeSpecific as TDSDecimalColumnSpecific;
// Write values
destination.WriteByte(typeSpecific.Length);
destination.WriteByte(typeSpecific.Precision);
destination.WriteByte(typeSpecific.Scale);
break;
}
case TDSDataType.BigBinary:
case TDSDataType.BigVarBinary:
{
// Short length
TDSUtilities.WriteUShort(destination, (ushort)DataTypeSpecific);
break;
}
case TDSDataType.BigChar:
case TDSDataType.BigVarChar:
case TDSDataType.NChar:
case TDSDataType.NVarChar:
{
// Cast to type specific information
TDSShilohVarCharColumnSpecific typedSpecific = DataTypeSpecific as TDSShilohVarCharColumnSpecific;
// Write length
TDSUtilities.WriteUShort(destination, typedSpecific.Length);
// Write collation
TDSUtilities.WriteUInt(destination, typedSpecific.Collation.WCID);
destination.WriteByte(typedSpecific.Collation.SortID);
break;
}
case TDSDataType.Text:
case TDSDataType.NText:
{
// YukonTextType.Len + YukonTextType.tdsCollationInfo + YukonTextType.cParts
// cb = sizeof(LONG) + sizeof(TDSCOLLATION) + sizeof(BYTE);
break;
}
case TDSDataType.Image:
{
// Integer length
TDSUtilities.WriteUInt(destination, (uint)DataTypeSpecific);
break;
}
case TDSDataType.SSVariant:
{
// Data length
TDSUtilities.WriteUInt(destination, (uint)DataTypeSpecific);
break;
}
case TDSDataType.Udt:
{
// hr = GetUDTColFmt(pvOwner, dwTimeout);
break;
}
case TDSDataType.Xml:
{
// cb = sizeof(lpColFmt->YukonXmlType.bSchemaPresent);
break;
}
}
Microsoft.SqlServer.TDS.Row.TDSRowTokenBase.DeflateTypeVarByte(destination, DataType, Value, DataTypeSpecific);
}
public override bool Inflate(Stream source)
{
var len = source.ReadByte();
if (len == -1)
{
return(false);
}
ParamMetaData = TDSUtilities.ReadString(source, (ushort)(len * 2));
StatusFlags = new TDSRPCRequestStatusFlags((byte)source.ReadByte());
DataType = (TDSDataType)source.ReadByte();
// Dispatch further reading based on the type
switch (DataType)
{
case TDSDataType.Binary:
case TDSDataType.VarBinary:
case TDSDataType.Char:
case TDSDataType.VarChar:
// The above types are deprecated after TDS 7205.
case TDSDataType.BitN:
case TDSDataType.Guid:
case TDSDataType.IntN:
case TDSDataType.MoneyN:
case TDSDataType.FloatN:
case TDSDataType.DateTimeN:
{
// Byte length
DataTypeSpecific = source.ReadByte();
break;
}
case TDSDataType.DateN:
{
// No details
DataTypeSpecific = null;
break;
}
case TDSDataType.TimeN:
case TDSDataType.DateTime2N:
case TDSDataType.DateTimeOffsetN:
{
// Scale
DataTypeSpecific = source.ReadByte();
break;
}
case TDSDataType.DecimalN:
case TDSDataType.NumericN:
{
// Read values
byte length = (byte)source.ReadByte();
byte precision = (byte)source.ReadByte();
byte scale = (byte)source.ReadByte();
// Decimal data type specific
DataTypeSpecific = new TDSDecimalColumnSpecific(length, precision, scale);
break;
}
case TDSDataType.BigBinary:
case TDSDataType.BigVarBinary:
{
// Short length
DataTypeSpecific = TDSUtilities.ReadUShort(source);
break;
}
case TDSDataType.BigChar:
case TDSDataType.BigVarChar:
case TDSDataType.NChar:
case TDSDataType.NVarChar:
{
// SHILOH CHAR types have collation associated with it.
TDSShilohVarCharColumnSpecific typedSpecific = new TDSShilohVarCharColumnSpecific();
// Read length
typedSpecific.Length = TDSUtilities.ReadUShort(source);
// Create collation
typedSpecific.Collation = new TDSColumnDataCollation();
// Read collation
typedSpecific.Collation.WCID = TDSUtilities.ReadUInt(source);
typedSpecific.Collation.SortID = (byte)source.ReadByte();
DataTypeSpecific = typedSpecific;
break;
}
case TDSDataType.Text:
case TDSDataType.NText:
{
// YukonTextType.Len + YukonTextType.tdsCollationInfo + YukonTextType.cParts
// cb = sizeof(LONG) + sizeof(TDSCOLLATION) + sizeof(BYTE);
break;
}
case TDSDataType.Image:
{
// Data length
DataTypeSpecific = TDSUtilities.ReadUInt(source);
break;
}
case TDSDataType.SSVariant:
{
// Data length
DataTypeSpecific = TDSUtilities.ReadUInt(source);
break;
}
case TDSDataType.Udt:
{
// hr = GetUDTColFmt(pvOwner, dwTimeout);
break;
}
case TDSDataType.Xml:
{
// cb = sizeof(lpColFmt->YukonXmlType.bSchemaPresent);
break;
}
}
Value = TDSRowTokenBase.InflateColumnData(source, DataType, DataTypeSpecific);
return(true);
}
