iTextSharp.text.pdf.PdfWriter.PdfBody.WriteCrossReferenceTable C# (CSharp) Метод

            public virtual void WriteCrossReferenceTable(Stream os, PdfIndirectReference root, PdfIndirectReference info, PdfIndirectReference encryption, PdfObject fileID, long prevxref)
            {
                int refNumber = 0;
                if (writer.FullCompression) {
                    FlushObjStm();
                    refNumber = IndirectReferenceNumber;
                    xrefs[new PdfCrossReference(refNumber, position)] = null;
                }
                int first = ((PdfCrossReference)xrefs.GetMinKey()).Refnum;
                int len = 0;
                List<int> sections = new List<int>();
                foreach (PdfCrossReference entry in xrefs.Keys) {
                    if (first + len == entry.Refnum)
                        ++len;
                    else {
                        sections.Add(first);
                        sections.Add(len);
                        first = entry.Refnum;
                        len = 1;
                    }
                }
                sections.Add(first);
                sections.Add(len);
                if (writer.FullCompression) {
                    int mid = 5;
                    long mask = 0xff00000000L;
                    for (; mid > 1; --mid) {
                        if ((mask & position) != 0)
                            break;
                        mask >>= 8;
                    }
                    ByteBuffer buf = new ByteBuffer();

                    foreach (PdfCrossReference entry in xrefs.Keys) {
                        entry.ToPdf(mid, buf);
                    }
                    PdfStream xr = new PdfStream(buf.ToByteArray());
                    buf = null;
                    xr.FlateCompress(writer.CompressionLevel);
                    xr.Put(PdfName.SIZE, new PdfNumber(Size));
                    xr.Put(PdfName.ROOT, root);
                    if (info != null) {
                        xr.Put(PdfName.INFO, info);
                    }
                    if (encryption != null)
                        xr.Put(PdfName.ENCRYPT, encryption);
                    if (fileID != null)
                        xr.Put(PdfName.ID, fileID);
                    xr.Put(PdfName.W, new PdfArray(new int[]{1, mid, 2}));
                    xr.Put(PdfName.TYPE, PdfName.XREF);
                    PdfArray idx = new PdfArray();
                    for (int k = 0; k < sections.Count; ++k)
                        idx.Add(new PdfNumber(sections[k]));
                    xr.Put(PdfName.INDEX, idx);
                    if (prevxref > 0)
                        xr.Put(PdfName.PREV, new PdfNumber(prevxref));
                    PdfEncryption enc = writer.crypto;
                    writer.crypto = null;
                    PdfIndirectObject indirect = new PdfIndirectObject(refNumber, xr, writer);
                    indirect.WriteTo(writer.Os);
                    writer.crypto = enc;
                }
                else {
                    byte[] tmp = GetISOBytes("xref\n");
                    os.Write(tmp, 0, tmp.Length);
                    System.Collections.IEnumerator i = xrefs.Keys;
                    i.MoveNext();
                    for (int k = 0; k < sections.Count; k += 2) {
                        first = sections[k];
                        len = sections[k + 1];
                        tmp = GetISOBytes(first.ToString());
                        os.Write(tmp, 0, tmp.Length);
                        os.WriteByte((byte)' ');
                        tmp = GetISOBytes(len.ToString());
                        os.Write(tmp, 0, tmp.Length);
                        os.WriteByte((byte)'\n');
                        while (len-- > 0) {
                            ((PdfCrossReference)i.Current).ToPdf(os);
                            i.MoveNext();
                        }
                    }
                }
            }