private static Ptg ReadRefPtg(byte[] formulaRawBytes)
{
using (MemoryStream ms = new MemoryStream(formulaRawBytes))
{
ILittleEndianInput in1 = new LittleEndianInputStream(ms);
byte ptgSid = (byte)in1.ReadByte();
switch (ptgSid)
{
case AreaPtg.sid: return new AreaPtg(in1);
case Area3DPtg.sid: return new Area3DPtg(in1);
case RefPtg.sid: return new RefPtg(in1);
case Ref3DPtg.sid: return new Ref3DPtg(in1);
}
return null;
}
}
/**
* Constructs a OBJ record and Sets its fields appropriately.
*
* @param in the RecordInputstream to Read the record from
*/
public ObjRecord(RecordInputStream in1)
{
// TODO - problems with OBJ sub-records stream
// MS spec says first sub-record is always CommonObjectDataSubRecord,
// and last is
// always EndSubRecord. OOO spec does not mention ObjRecord(0x005D).
// Existing POI test data seems to violate that rule. Some test data
// seems to contain
// garbage, and a crash is only averted by stopping at what looks like
// the 'EndSubRecord'
//Check if this can be continued, if so then the
//following wont work properly
//int subSize = 0;
byte[] subRecordData = in1.ReadRemainder();
if (LittleEndian.GetUShort(subRecordData, 0) != CommonObjectDataSubRecord.sid)
{
// seems to occur in just one junit on "OddStyleRecord.xls" (file created by CrystalReports)
// Excel tolerates the funny ObjRecord, and replaces it with a corrected version
// The exact logic/reasoning is not yet understood
_uninterpretedData = subRecordData;
subrecords = null;
return;
}
//if (subRecordData.Length % 2 != 0)
//{
// String msg = "Unexpected length of subRecordData : " + HexDump.ToHex(subRecordData);
// throw new RecordFormatException(msg);
//}
subrecords = new List<SubRecord>();
using (MemoryStream bais = new MemoryStream(subRecordData))
{
LittleEndianInputStream subRecStream = new LittleEndianInputStream(bais);
CommonObjectDataSubRecord cmo = (CommonObjectDataSubRecord)SubRecord.CreateSubRecord(subRecStream, 0);
subrecords.Add(cmo);
while (true)
{
SubRecord subRecord = SubRecord.CreateSubRecord(subRecStream, cmo.ObjectType);
subrecords.Add(subRecord);
if (subRecord.IsTerminating)
{
break;
}
}
int nRemainingBytes = subRecStream.Available();
if (nRemainingBytes > 0)
{
// At present (Oct-2008), most unit test samples have (subRecordData.length % 2 == 0)
_isPaddedToQuadByteMultiple = subRecordData.Length % MAX_PAD_ALIGNMENT == 0;
if (nRemainingBytes >= (_isPaddedToQuadByteMultiple ? MAX_PAD_ALIGNMENT : NORMAL_PAD_ALIGNMENT))
{
if (!CanPaddingBeDiscarded(subRecordData, nRemainingBytes))
{
String msg = "Leftover " + nRemainingBytes
+ " bytes in subrecord data " + HexDump.ToHex(subRecordData);
throw new RecordFormatException(msg);
}
_isPaddedToQuadByteMultiple = false;
}
}
else
{
_isPaddedToQuadByteMultiple = false;
}
_uninterpretedData = null;
}
}