public StreamEncryptionInfo(RecordInputStream rs, List <Record> outputRecs)
{
Record rec;
rs.NextRecord();
int recSize = 4 + rs.Remaining;
rec = RecordFactory.CreateSingleRecord(rs);
outputRecs.Add(rec);
FilePassRecord fpr = null;
if (rec is BOFRecord)
{
_hasBOFRecord = true;
if (rs.HasNextRecord)
{
rs.NextRecord();
rec = RecordFactory.CreateSingleRecord(rs);
recSize += rec.RecordSize;
outputRecs.Add(rec);
if (rec is FilePassRecord)
{
fpr = (FilePassRecord)rec;
outputRecs.RemoveAt(outputRecs.Count - 1);
// TODO - add fpr not Added to outPutRecs
rec = outputRecs[0];
}
else
{
// workbook not encrypted (typical case)
if (rec is EOFRecord)
{
// A workbook stream is never empty, so crash instead
// of trying to keep track of nesting level
throw new InvalidOperationException("Nothing between BOF and EOF");
}
}
}
}
else
{
// Invalid in a normal workbook stream.
// However, some test cases work on sub-sections of
// the workbook stream that do not begin with BOF
_hasBOFRecord = false;
}
_InitialRecordsSize = recSize;
_filePassRec = fpr;
_lastRecord = rec;
}
private static RecordInputStream ConvertToInputStream(DrawingRecord r)
{
byte[] data = r.Serialize();
using (MemoryStream ms = new MemoryStream(data))
{
RecordInputStream rinp = new RecordInputStream(ms);
rinp.NextRecord();
return(rinp);
}
}
public Record CloneViaReserialise()
{
// Do it via a re-serialization
// It's a cheat, but it works...
byte[] b = Serialize();
using (MemoryStream ms = new MemoryStream(b))
{
RecordInputStream rinp = new RecordInputStream(ms);
rinp.NextRecord();
Record[] r = RecordFactory.CreateRecord(rinp);
if (r.Length != 1)
{
throw new InvalidOperationException("Re-serialised a record to clone it, but got " + r.Length + " records back!");
}
return(r[0]);
}
}
/**
* Returns the next (complete) record from the
* stream, or null if there are no more.
*/
public Record NextRecord()
{
Record r;
r = GetNextUnreadRecord();
if (r != null)
{
// found an unread record
return(r);
}
while (true)
{
if (!_recStream.HasNextRecord)
{
// recStream is exhausted;
return(null);
}
// step underlying RecordInputStream to the next record
_recStream.NextRecord();
if (_lastRecordWasEOFLevelZero)
{
// Potential place for ending the workbook stream
// Check that the next record is not BOFRecord(0x0809)
// Normally the input stream Contains only zero pAdding after the last EOFRecord,
// but bug 46987 and 48068 suggests that the padding may be garbage.
// This code relies on the pAdding bytes not starting with BOFRecord.sid
if (_recStream.Sid != BOFRecord.sid)
{
return(null);
}
// else - another sheet substream starting here
}
r = ReadNextRecord();
if (r == null)
{
// some record types may get skipped (e.g. DBCellRecord and ContinueRecord)
continue;
}
return(r);
}
}
/**
* Constructs a EOFRecord record and Sets its fields appropriately.
* @param in the RecordInputstream to Read the record from
*/
public ExtSSTRecord(RecordInputStream in1)
{
field_1_strings_per_bucket = in1.ReadShort();
int nInfos = in1.Remaining / InfoSubRecord.ENCODED_SIZE;
List <InfoSubRecord> lst = new List <InfoSubRecord>(nInfos);
while (in1.Available() > 0)
{
InfoSubRecord info = new InfoSubRecord(in1);
lst.Add(info);
if (in1.Available() == 0 && in1.HasNextRecord && in1.GetNextSid() == ContinueRecord.sid)
{
in1.NextRecord();
}
}
_sstInfos = lst.ToArray();
}
