private void _readXrefTable(PdfStreamReader reader)
{
PdfValue Token;
// Read xref table
while ((Token = reader.ReadToken()).Type == PdfValueType.Integer)
{
int Id = ((PdfInteger)Token).Value;
int Count = reader.ReadInt();
_allocateXrefTable(Id + Count);
while (Count-- > 0)
{
int EntryPosition = reader.ReadInt();
int EntryRevision = reader.ReadInt();
bool EntryUsed = (reader.ReadByte() == 'n');
if (EntryPosition >= 10 && EntryUsed)
{
_xrefTable[Id] = new PdfReferenceReader(this, Id, EntryRevision, EntryPosition);
}
++Id;
}
}
// Read trailer
if (Token.Type != PdfValueType.Trailer)
{
throw new PdfExceptionReader("PDF stream corrupt: 'trailer' expected.");
}
reader.ReadToken(PdfValueType.DictionaryBegin);
while ((Token = reader.ReadToken()).Type != PdfValueType.DictionaryEnd)
{
if (Token.Type == PdfValueType.Name)
{
switch (((PdfName)Token).Value)
{
case "Size":
if (reader.ReadInt() != _xrefTable.Length)
{
throw new PdfExceptionReader("PDF stream corrupt: Xref table size d'not match trailer 'Size'.");
}
break;
case "Prev": {
var p = reader.ReadInt();
reader.ReadToken(PdfValueType.Xref);
_readXrefTable(new PdfStreamReader(this, _stream, p));
}
break;
case "Root":
_rootReference = pdfGetReference(reader.ReadReference());
break;
case "Encrypt":
_encryptReference = pdfGetReference(reader.ReadReference());
break;
case "Info":
_infoReference = pdfGetReference(reader.ReadReference());
break;
case "ID": {
List <PdfValue> ID = new List <PdfValue>();
reader.ReadToken(PdfValueType.ArrayBegin);
while ((Token = reader.ReadToken()).Type != PdfValueType.ArrayEnd)
{
ID.Add(Token);
}
_id = ID.ToArray();
}
break;
}
}
}
}