public TarArchiveEntryStream(TarArchive tar, TarArchiveEntry entry)
{
if (entry is null)
{
throw new ArgumentNullException(nameof(entry));
}
this.tar = tar ?? throw new ArgumentNullException(nameof(tar));
entryStream = entry.Open();
}
public TarArchive(Stream stream)
{
if (stream is null)
{
throw new ArgumentNullException(nameof(stream));
}
entries = new List <TarArchiveEntry>();
var header = new byte[512];
var zeroBlockCount = 0;
var position = 0L;
while (zeroBlockCount < 2)
{
var length = stream.Read(header, 0, header.Length);
if (length < 512)
{
throw new InvalidDataException($"Invalid header block size < 512");
}
position += length;
if (IsAllZeros(header))
{
++zeroBlockCount;
}
else
{
zeroBlockCount = 0;
var fileName = GetString(header, 0, 100);
ValidateChecksum(header, fileName);
var fileLength = ReadFileSize(header, fileName);
if (IsFileType(header))
{
var lastModifiedTime = ReadLastModifiedTime(header, fileName);
fileName = AddFilePrefix(header, fileName);
var entry = new TarArchiveEntry(stream, fileName, lastModifiedTime.DateTime.ToLocalTime(), fileLength);
position += fileLength;
position = SeekToNextEntry(header, stream, position, fileName);
entries.Add(entry);
}
}
}
}
