// Returns a stream that represents the data section of the current header.
// If copyData is true, then a total number of _size bytes will be copied to a new MemoryStream, which is then returned.
// Otherwise, if the archive stream is seekable, returns a seekable wrapper stream.
// Otherwise, it returns an unseekable wrapper stream.
private Stream?GetDataStream(Stream archiveStream, bool copyData)
{
if (_size == 0)
{
return(null);
}
if (copyData)
{
MemoryStream copiedData = new MemoryStream();
TarHelpers.CopyBytes(archiveStream, copiedData, _size);
return(copiedData);
}
return(archiveStream.CanSeek
? new SeekableSubReadStream(archiveStream, archiveStream.Position, _size)
: new SubReadStream(archiveStream, 0, _size));
}
// Returns a stream that represents the data section of the current header.
// If copyData is true, then a total number of _size bytes will be copied to a new MemoryStream, which is then returned.
// Otherwise, if the archive stream is seekable, returns a seekable wrapper stream.
// Otherwise, it returns an unseekable wrapper stream.
private Stream?GetDataStream(Stream archiveStream, bool copyData)
{
if (_size == 0)
{
return(null);
}
if (copyData)
{
MemoryStream copiedData = new MemoryStream();
TarHelpers.CopyBytes(archiveStream, copiedData, _size);
// Reset position pointer so the user can do the first DataStream read from the beginning
copiedData.Position = 0;
return(copiedData);
}
return(archiveStream.CanSeek
? new SeekableSubReadStream(archiveStream, archiveStream.Position, _size)
: new SubReadStream(archiveStream, 0, _size));
}
