public CommonVolumeDescriptor(byte[] src, int offset, Encoding enc)
            : base(src, offset)
        {
            CharacterEncoding = enc;

            SystemIdentifier               = IsoUtilities.ReadChars(src, offset + 8, 32, CharacterEncoding);
            VolumeIdentifier               = IsoUtilities.ReadChars(src, offset + 40, 32, CharacterEncoding);
            VolumeSpaceSize                = IsoUtilities.ToUInt32FromBoth(src, offset + 80);
            VolumeSetSize                  = IsoUtilities.ToUInt16FromBoth(src, offset + 120);
            VolumeSequenceNumber           = IsoUtilities.ToUInt16FromBoth(src, offset + 124);
            LogicalBlockSize               = IsoUtilities.ToUInt16FromBoth(src, offset + 128);
            PathTableSize                  = IsoUtilities.ToUInt32FromBoth(src, offset + 132);
            TypeLPathTableLocation         = Utilities.ToUInt32LittleEndian(src, offset + 140);
            OptionalTypeLPathTableLocation = Utilities.ToUInt32LittleEndian(src, offset + 144);
            TypeMPathTableLocation         = Utilities.BitSwap(Utilities.ToUInt32LittleEndian(src, offset + 148));
            OptionalTypeMPathTableLocation = Utilities.BitSwap(Utilities.ToUInt32LittleEndian(src, offset + 152));
            DirectoryRecord.ReadFrom(src, offset + 156, CharacterEncoding, out RootDirectory);
            VolumeSetIdentifier         = IsoUtilities.ReadChars(src, offset + 190, 318 - 190, CharacterEncoding);
            PublisherIdentifier         = IsoUtilities.ReadChars(src, offset + 318, 446 - 318, CharacterEncoding);
            DataPreparerIdentifier      = IsoUtilities.ReadChars(src, offset + 446, 574 - 446, CharacterEncoding);
            ApplicationIdentifier       = IsoUtilities.ReadChars(src, offset + 574, 702 - 574, CharacterEncoding);
            CopyrightFileIdentifier     = IsoUtilities.ReadChars(src, offset + 702, 739 - 702, CharacterEncoding);
            AbstractFileIdentifier      = IsoUtilities.ReadChars(src, offset + 739, 776 - 739, CharacterEncoding);
            BibliographicFileIdentifier = IsoUtilities.ReadChars(src, offset + 776, 813 - 776, CharacterEncoding);
            CreationDateAndTime         = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 813);
            ModificationDateAndTime     = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 830);
            ExpirationDateAndTime       = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 847);
            EffectiveDateAndTime        = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 864);
            FileStructureVersion        = src[offset + 881];
        }
        private DateTime ReadTimestamp(Timestamps timestamp, byte[] data, bool longForm, ref int pos)
        {
            DateTime result = DateTime.MinValue;

            if ((TimestampsPresent & timestamp) != 0)
            {
                if (longForm)
                {
                    result = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(data, pos);
                    pos   += 17;
                }
                else
                {
                    result = IsoUtilities.ToUTCDateTimeFromDirectoryTime(data, pos);
                    pos   += 7;
                }
            }

            return(result);
        }