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];
}
public static int ReadFrom(byte[] src, int offset, Encoding enc, out DirectoryRecord record)
{
int length = src[offset + 0];
record = new DirectoryRecord();
record.ExtendedAttributeRecordLength = src[offset + 1];
record.LocationOfExtent = IsoUtilities.ToUInt32FromBoth(src, offset + 2);
record.DataLength = IsoUtilities.ToUInt32FromBoth(src, offset + 10);
record.RecordingDateAndTime = IsoUtilities.ToUTCDateTimeFromDirectoryTime(src, offset + 18);
record.Flags = (FileFlags)src[offset + 25];
record.FileUnitSize = src[offset + 26];
record.InterleaveGapSize = src[offset + 27];
record.VolumeSequenceNumber = IsoUtilities.ToUInt16FromBoth(src, offset + 28);
byte lengthOfFileIdentifier = src[offset + 32];
record.FileIdentifier = IsoUtilities.ReadChars(src, offset + 33, lengthOfFileIdentifier, enc);
int padding = (lengthOfFileIdentifier & 1) == 0 ? 1 : 0;
int startSystemArea = lengthOfFileIdentifier + padding + 33;
int lenSystemArea = length - startSystemArea;
if (lenSystemArea > 0)
{
record.SystemUseData = new byte[lenSystemArea];
Array.Copy(src, offset + startSystemArea, record.SystemUseData, 0, lenSystemArea);
}
return(length);
}
private static int WriteMember(BuildDirectoryMember m, string nameOverride, Encoding nameEnc, byte[] buffer,
int offset, Dictionary <BuildDirectoryMember, uint> locationTable, Encoding dataEnc)
{
DirectoryRecord dr = new DirectoryRecord();
dr.FileIdentifier = m.PickName(nameOverride, nameEnc);
dr.LocationOfExtent = locationTable[m];
dr.DataLength = (uint)m.GetDataSize(dataEnc);
dr.RecordingDateAndTime = m.CreationTime;
dr.Flags = (m is BuildDirectoryInfo) ? FileFlags.Directory : FileFlags.None;
return(dr.WriteTo(buffer, offset, nameEnc));
}
public CommonVolumeDescriptor(
VolumeDescriptorType type,
byte version,
uint volumeSpaceSize,
uint pathTableSize,
uint typeLPathTableLocation,
uint typeMPathTableLocation,
uint rootDirExtentLocation,
uint rootDirDataLength,
DateTime buildTime,
Encoding enc)
: base(type, version)
{
CharacterEncoding = enc;
SystemIdentifier = string.Empty;
VolumeIdentifier = string.Empty;
VolumeSpaceSize = volumeSpaceSize;
VolumeSetSize = 1;
VolumeSequenceNumber = 1;
LogicalBlockSize = IsoUtilities.SectorSize;
PathTableSize = pathTableSize;
TypeLPathTableLocation = typeLPathTableLocation;
////OptionalTypeLPathTableLocation = 0;
TypeMPathTableLocation = typeMPathTableLocation;
////OptionalTypeMPathTableLocation = 0;
RootDirectory = new DirectoryRecord();
RootDirectory.ExtendedAttributeRecordLength = 0;
RootDirectory.LocationOfExtent = rootDirExtentLocation;
RootDirectory.DataLength = rootDirDataLength;
RootDirectory.RecordingDateAndTime = buildTime;
RootDirectory.Flags = FileFlags.Directory;
RootDirectory.FileUnitSize = 0;
RootDirectory.InterleaveGapSize = 0;
RootDirectory.VolumeSequenceNumber = 1;
RootDirectory.FileIdentifier = "\0";
VolumeSetIdentifier = string.Empty;
PublisherIdentifier = string.Empty;
DataPreparerIdentifier = string.Empty;
ApplicationIdentifier = string.Empty;
CopyrightFileIdentifier = string.Empty;
AbstractFileIdentifier = string.Empty;
BibliographicFileIdentifier = string.Empty;
CreationDateAndTime = buildTime;
ModificationDateAndTime = buildTime;
ExpirationDateAndTime = DateTime.MinValue;
EffectiveDateAndTime = buildTime;
FileStructureVersion = 1; // V1
}
internal uint GetDirectoryRecordSize(Encoding enc)
{
return(DirectoryRecord.CalcLength(PickName(null, enc), enc));
}
internal static bool IsSpecialDirectory(DirectoryRecord r)
{
return(r.FileIdentifier == "\0" || r.FileIdentifier == "\x01");
}
