private long GetLastEndOfFileMarker() { var originalOffset = reader.GetPosition(); var searchTerm = OtherEncodings.StringAsLatin1Bytes("%%EOF"); var minimumEndOffset = reader.Length() - searchTerm.Length; reader.Seek(minimumEndOffset); while (reader.GetPosition() > 0) { if (ReadHelper.IsString(reader, searchTerm)) { var position = reader.GetPosition(); reader.Seek(originalOffset); return(position); } reader.Seek(minimumEndOffset--); } reader.Seek(originalOffset); return(long.MaxValue); }
public long Length() { if (Throw) { throw new InvalidOperationException(); } return(reader.Length()); }
public PdfRawStream Parse(IRandomAccessRead reader, PdfDictionary streamDictionary, bool isLenientParsing, IPdfObjectParser parser) { PdfRawStream result; // read 'stream'; this was already tested in parseObjectsDynamically() ReadHelper.ReadExpectedString(reader, "stream"); skipWhiteSpaces(reader); // This needs to be streamDictionary.getItem because when we are parsing, the underlying object might still be null. ICosNumber streamLength = GetLength(reader, streamDictionary.GetItemOrDefault(CosName.LENGTH), streamDictionary.GetName(CosName.TYPE), isLenientParsing, parser); ValidateStreamLength(reader, isLenientParsing, streamLength); // get output stream to copy data to using (var stream = new MemoryStream()) using (var writer = new BinaryWriter(stream)) { if (streamLength != null && validateStreamLength(reader, streamLength.AsLong(), reader.Length())) { ReadValidStream(reader, writer, streamLength); } else { ReadUntilEndStream(reader, writer); } result = new PdfRawStream(stream.ToArray(), streamDictionary); } String endStream = ReadHelper.ReadString(reader); if (endStream.Equals("endobj") && isLenientParsing) { log.Warn($"stream ends with \'endobj\' instead of \'endstream\' at offset {reader.GetPosition()}"); // avoid follow-up warning about missing endobj reader.Rewind("endobj".Length); } else if (endStream.Length > 9 && isLenientParsing && endStream.Substring(0, 9).Equals("endstream")) { log.Warn("stream ends with '" + endStream + "' instead of 'endstream' at offset " + reader.GetPosition()); // unread the "extra" bytes reader.Rewind(OtherEncodings.StringAsLatin1Bytes(endStream.Substring(9)).Length); } else if (!endStream.Equals("endstream")) { throw new InvalidOperationException("Error reading stream, expected='endstream' actual='" + endStream + "' at offset " + reader.GetPosition()); } return(result); }