/** * 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; } }
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; } }