public CommAreaGroupDescriptor(
DrdaStreamReader reader)
{
if (reader.ReadUInt8() == 0xFF)
{
return;
}
SqlCode = reader.ReadUInt32();
SqlState = reader.ReadString(5);
var sqlErrProc = reader.ReadString(8);
if (reader.ReadUInt8() != 0xFF)
{
RowsFetched = reader.ReadUInt64();
RowsUpdated = reader.ReadUInt32();
var sqlErrs = reader.ReadBytes(12); // 3 * sizeof(UInt32)
var sqlWarn = reader.ReadBytes(11); // 11 * sizeof(Byte)
var rdbName = reader.ReadUInt16();
SqlMessage = reader.ReadVcmVcs();
}
if (reader.ReadUInt8() != 0xFF)
{
// WORKWORK
}
}
public static Decimal ReadDecimal(
this DrdaStreamReader reader,
Int32 precision,
Int32 scale)
{
var value = 0M;
var bytes = precision / 2;
for (var index = 0; index < bytes; ++index)
{
var nybbles = reader.ReadUInt8();
var hiNybble = (nybbles >> 4) & 0xF;
var lowNybble = nybbles & 0xF;
value = value * 10 + hiNybble;
value = value * 10 + lowNybble;
}
var lastNybbles = reader.ReadUInt8();
if (precision % 2 == 1)
{
var hiNybble = (lastNybbles >> 4) & 0xF;
value = value * 10 + hiNybble;
}
if ((lastNybbles & 0x0F) == 0x0D)
{
value = Decimal.Negate(value);
}
return(value * Scales[scale]);
}
public ResponseMessage(
DrdaStreamReader reader)
{
Size = reader.ReadUInt16();
reader.ReadUInt8(); // DDMID
Format = (MessageFormat)reader.ReadUInt8();
RequestCorrelationId = reader.ReadUInt16();
Command = (ICommand)CodePointMapper.Deserialize(reader);
}
internal void Process(
QueryContext context)
{
using var stream = new MemoryStream(_messageBytes, false);
var reader = new DrdaStreamReader(stream);
while (stream.Position < stream.Length)
{
var length = reader.ReadUInt8();
var type = reader.ReadUInt8();
var id = reader.ReadUInt8();
// TODO: olegra - store full parsing tree here later
if (id != 0xD0)
{
reader.ReadBytes((UInt32)length - 3);
continue;
}
var triples = new Triple[length / 3 - 1];
for (var index = 0; index < triples.Length; ++index)
{
switch (type)
{
case 117: // GDA
case 118: // NGDA
triples[index] = new Triple(
reader.ReadUInt8(),
reader.ReadUInt16());
break;
case 113: // RLO
// TODO: olegra - skip for now
reader.ReadUInt8();
reader.ReadUInt16();
break;
}
}
for (var index = 0; index < triples.Length; ++index)
{
context.Columns[index].TripletType = triples[index].Type;
context.Columns[index].TripletDataSize = triples[index].Size;
}
}
}
public UInt8Parameter(
DrdaStreamReader reader,
CodePoint codePoint)
: this(
codePoint,
reader.ReadUInt8())
{
}
private static String ReadVarString(
this DrdaStreamReader reader,
Byte hiByte)
{
var size = (hiByte << 8) | reader.ReadUInt8();
var bytes = reader.ReadBytes((UInt32)size);
return(Encoding.UTF8.GetString(bytes));
}
public DrdaColumn(
DrdaStreamReader reader)
{
Precision = reader.ReadUInt16();
Scale = reader.ReadUInt16();
Length = reader.ReadUInt64();
Db2Type = (Db2Type)reader.ReadUInt16();
CcsId = reader.ReadUInt16();
ArrayExt = reader.ReadUInt8();
Unnamed = reader.ReadUInt16();
Name = reader.ReadVcmVcs();
Label = reader.ReadVcmVcs();
Comment = reader.ReadVcmVcs();
var hiByte = reader.ReadUInt8();
if (hiByte != 0xFF)
{
TypeName = reader.ReadVcmVcs(hiByte);
ClassName = reader.ReadVcmVcs();
}
// ReSharper disable once RedundantAssignment
reader.ReadUInt8();
KeyMem = reader.ReadUInt16();
Updateable = reader.ReadUInt16();
Generated = reader.ReadUInt16();
ParameterMode = reader.ReadUInt16();
RdbName = reader.ReadVarString();
CoreName = reader.ReadVcmVcs();
BaseName = reader.ReadVcmVcs();
Scheme = reader.ReadVcmVcs();
DxName = reader.ReadVcmVcs();
}
public static String ReadString(
this DrdaStreamReader reader,
Int32 maxLength)
{
var buffer = new StringBuilder(maxLength);
do
{
var character = (Char)reader.ReadUInt8();
if (character == 0x00)
{
break;
}
buffer.Append(character);
} while (--maxLength != 0);
return(buffer.ToString());
}
private Boolean ProcessSingleRow(
DrdaStreamReader reader,
QueryContext context)
{
var groupDescriptor = new CommAreaGroupDescriptor(reader);
reader.ReadUInt8(); // Parent nullable triplet
if (groupDescriptor.SqlCode == 100 &&
String.Equals(groupDescriptor.SqlState, "02000"))
{
context.HasMoreData = false;
return(false);
}
context.Rows.Enqueue(context.Columns
.Select(reader.ReadColumnValue).ToList());
return(true);
}
