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;
     }
 }
Пример #2
0
        /**
         * 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;
            }
        }