/// <summary>
/// Read the next 512 byte chunk of data as a tar header.
/// </summary>
/// <returns>A tar header struct. null if we have reached the end of the archive.</returns>
protected TarHeader ReadHeader()
{
byte[] header = m_br.ReadBytes(512);
// If there are no more bytes in the stream, return null header
if (header.Length == 0)
return null;
// If we've reached the end of the archive we'll be in null block territory, which means
// the next byte will be 0
if (header[0] == 0)
return null;
TarHeader tarHeader = new TarHeader();
// If we're looking at a GNU tar long link then extract the long name and pull up the next header
if (header[156] == (byte)'L')
{
int longNameLength = ConvertOctalBytesToDecimal(header, 124, 11);
tarHeader.FilePath = m_asciiEncoding.GetString(ReadData(longNameLength));
//m_log.DebugFormat("[TAR ARCHIVE READER]: Got long file name {0}", tarHeader.FilePath);
header = m_br.ReadBytes(512);
}
else
{
tarHeader.FilePath = m_asciiEncoding.GetString(header, 0, 100);
tarHeader.FilePath = tarHeader.FilePath.Trim(m_nullCharArray);
//m_log.DebugFormat("[TAR ARCHIVE READER]: Got short file name {0}", tarHeader.FilePath);
}
tarHeader.FileSize = ConvertOctalBytesToDecimal(header, 124, 11);
switch (header[156])
{
case 0:
tarHeader.EntryType = TarEntryType.TYPE_NORMAL_FILE;
break;
case (byte)'0':
tarHeader.EntryType = TarEntryType.TYPE_NORMAL_FILE;
break;
case (byte)'1':
tarHeader.EntryType = TarEntryType.TYPE_HARD_LINK;
break;
case (byte)'2':
tarHeader.EntryType = TarEntryType.TYPE_SYMBOLIC_LINK;
break;
case (byte)'3':
tarHeader.EntryType = TarEntryType.TYPE_CHAR_SPECIAL;
break;
case (byte)'4':
tarHeader.EntryType = TarEntryType.TYPE_BLOCK_SPECIAL;
break;
case (byte)'5':
tarHeader.EntryType = TarEntryType.TYPE_DIRECTORY;
break;
case (byte)'6':
tarHeader.EntryType = TarEntryType.TYPE_FIFO;
break;
case (byte)'7':
tarHeader.EntryType = TarEntryType.TYPE_CONTIGUOUS_FILE;
break;
}
return tarHeader;
}
/// <summary>
/// Read the next 512 byte chunk of data as a tar header.
/// </summary>
/// <returns>A tar header struct. null if we have reached the end of the archive.</returns>
protected TarHeader ReadHeader()
{
byte[] header = m_br.ReadBytes(512);
// If we've reached the end of the archive we'll be in null block territory, which means
// the next byte will be 0
if (header[0] == 0)
{
return(null);
}
TarHeader tarHeader = new TarHeader();
// If we're looking at a GNU tar long link then extract the long name and pull up the next header
if (header[156] == (byte)'L')
{
int longNameLength = ConvertOctalBytesToDecimal(header, 124, 11);
tarHeader.FilePath = m_asciiEncoding.GetString(ReadData(longNameLength));
//m_log.DebugFormat("[TAR ARCHIVE READER]: Got long file name {0}", tarHeader.FilePath);
header = m_br.ReadBytes(512);
}
else
{
tarHeader.FilePath = m_asciiEncoding.GetString(header, 0, 100);
tarHeader.FilePath = tarHeader.FilePath.Trim(m_nullCharArray);
//m_log.DebugFormat("[TAR ARCHIVE READER]: Got short file name {0}", tarHeader.FilePath);
}
tarHeader.FileSize = ConvertOctalBytesToDecimal(header, 124, 11);
switch (header[156])
{
case 0:
tarHeader.EntryType = TarEntryType.TYPE_NORMAL_FILE;
break;
case (byte)'0':
tarHeader.EntryType = TarEntryType.TYPE_NORMAL_FILE;
break;
case (byte)'1':
tarHeader.EntryType = TarEntryType.TYPE_HARD_LINK;
break;
case (byte)'2':
tarHeader.EntryType = TarEntryType.TYPE_SYMBOLIC_LINK;
break;
case (byte)'3':
tarHeader.EntryType = TarEntryType.TYPE_CHAR_SPECIAL;
break;
case (byte)'4':
tarHeader.EntryType = TarEntryType.TYPE_BLOCK_SPECIAL;
break;
case (byte)'5':
tarHeader.EntryType = TarEntryType.TYPE_DIRECTORY;
break;
case (byte)'6':
tarHeader.EntryType = TarEntryType.TYPE_FIFO;
break;
case (byte)'7':
tarHeader.EntryType = TarEntryType.TYPE_CONTIGUOUS_FILE;
break;
}
return(tarHeader);
}