/// <summary>
/// Parse the node record from the given stream.
/// </summary>
/// <param name="s">The stream to parse from.</param>
public void Parse(Stream s)
{
EndianBitConverter bc = EndianBitConverter.CreateForLittleEndian();
long startPosition = s.Position;
byte[] buffer = new byte[ISOFile.SECTOR_SIZE];
// Get the length
s.Read(buffer, 0, 1);
this.Length = buffer[0];
//the number of sectors in the attribute record
s.Read(buffer, 0, 1);
// Read Data Offset
s.Read(buffer, 0, 8);
this.OffsetOfData = (long)bc.ToInt32(buffer);
// Read Data Length
s.Read(buffer, 0, 8);
this.LengthOfData = (long)bc.ToInt32(buffer);
// Read the time and flags
s.Read(buffer, 0, 8);
this.Year = buffer[0];
this.Month = buffer[1];
this.Day = buffer[2];
this.Hour = buffer[3];
this.Minute = buffer[4];
this.Second = buffer[5];
this.TimeZoneOffset = buffer[6];
this.Flags = buffer[7];
s.Read(buffer, 0, 6);
// Read the name length
s.Read(buffer, 0, 1);
this.NameLength = buffer[0];
// Read the directory name
s.Read(buffer, 0, this.NameLength);
if (this.NameLength == 1 && (buffer[0] == 0 || buffer[0] == 1))
{
if (buffer[0] == 0)
{
this.Name = ISONodeRecord.CURRENT_DIRECTORY;
}
else
{
this.Name = ISONodeRecord.PARENT_DIRECTORY;
}
}
else
{
this.Name = ASCIIEncoding.ASCII.GetString(buffer, 0, this.NameLength);
}
// Seek to end
s.Seek(startPosition + this.Length, SeekOrigin.Begin);
}
/// <summary>
/// Parse the volume descriptor header.
/// </summary>
/// <param name="s">The stream to parse from.</param>
public bool Parse(Stream s)
{
EndianBitConverter bc = EndianBitConverter.CreateForLittleEndian();
EndianBitConverter bcBig = EndianBitConverter.CreateForBigEndian();
long startPosition = s.Position;
byte[] buffer = new byte[ISOFile.SECTOR_SIZE];
// Read the entire structure
s.Read(buffer, 0, ISOFile.SECTOR_SIZE);
// Get the type
this.Type = buffer[0];
//zero 24-jun-2013 - validate
// "CD001" + 0x01
if (buffer[1] == 'C' && buffer[2] == 'D' && buffer[3] == '0' && buffer[4] == '0' && buffer[5] == '1' && buffer[6] == 0x01)
{
//it seems to be a valid volume descriptor
}
else
{
return(false);
}
// Handle the primary volume information
if (this.Type == 1)
{
int cursor = 8;
// Get the system identifier
Array.Copy(buffer, cursor,
this.SystemIdentifier, 0, LENGTH_SHORT_IDENTIFIER);
cursor += LENGTH_SHORT_IDENTIFIER;
// Get the volume identifier
Array.Copy(buffer, cursor,
this.VolumeIdentifier, 0, LENGTH_SHORT_IDENTIFIER);
cursor += LENGTH_SHORT_IDENTIFIER;
cursor += 8;
// Get the total number of sectors
this.NumberOfSectors = bc.ToInt32(buffer, cursor);
cursor += 8;
cursor += 32;
this.VolumeSetSize = bc.ToInt16(buffer, cursor);
cursor += 4;
this.VolumeSequenceNumber = bc.ToInt16(buffer, cursor);
cursor += 4;
this.SectorSize = bc.ToInt16(buffer, cursor);
cursor += 4;
this.PathTableSize = bc.ToInt32(buffer, cursor);
cursor += 8;
this.OffsetOfFirstLittleEndianPathTable = bc.ToInt32(buffer, cursor);
cursor += 4;
this.OffsetOfSecondLittleEndianPathTable = bc.ToInt32(buffer, cursor);
cursor += 4;
this.OffsetOfFirstLittleEndianPathTable = bcBig.ToInt32(buffer, cursor);
cursor += 4;
this.OffsetOfSecondLittleEndianPathTable = bcBig.ToInt32(buffer, cursor);
cursor += 4;
this.RootDirectoryRecord.Parse(buffer, cursor);
cursor += LENGTH_ROOT_DIRECTORY_RECORD;
Array.Copy(buffer, cursor,
this.VolumeSetIdentifier, 0, LENGTH_LONG_IDENTIFIER);
cursor += LENGTH_LONG_IDENTIFIER;
Array.Copy(buffer, cursor,
this.PublisherIdentifier, 0, LENGTH_LONG_IDENTIFIER);
cursor += LENGTH_LONG_IDENTIFIER;
Array.Copy(buffer, cursor,
this.DataPreparerIdentifier, 0, LENGTH_LONG_IDENTIFIER);
cursor += LENGTH_LONG_IDENTIFIER;
Array.Copy(buffer, cursor,
this.ApplicationIdentifier, 0, LENGTH_LONG_IDENTIFIER);
cursor += LENGTH_LONG_IDENTIFIER;
Array.Copy(buffer, cursor,
this.CopyrightFileIdentifier, 0, LENGTH_IDENTIFIER);
cursor += LENGTH_IDENTIFIER;
Array.Copy(buffer, cursor,
this.AbstractFileIdentifier, 0, LENGTH_IDENTIFIER);
cursor += LENGTH_IDENTIFIER;
Array.Copy(buffer, cursor,
this.BibliographicalFileIdentifier, 0, LENGTH_IDENTIFIER);
cursor += LENGTH_IDENTIFIER;
Array.Copy(buffer, cursor,
this.VolumeCreationDateTime, 0, LENGTH_TIME);
cursor += LENGTH_TIME;
Array.Copy(buffer, cursor,
this.LastModifiedDateTime, 0, LENGTH_TIME);
cursor += LENGTH_TIME;
Array.Copy(buffer, cursor,
this.ExpirationDateTime, 0, LENGTH_TIME);
cursor += LENGTH_TIME;
Array.Copy(buffer, cursor,
this.EffectiveDateTime, 0, LENGTH_TIME);
cursor += LENGTH_TIME;
cursor += 1;
cursor += 1;
Array.Copy(buffer, cursor,
this.Reserved, 0, LENGTH_RESERVED);
cursor += LENGTH_RESERVED;
}
return(true);
}
