/// <summary>
/// Writes padding to the output stream to align it to the next 512-block.
/// </summary>
/// <param name="writtenSize">Number of written bytes since last alignment.</param>
private void WritePadding(long writtenSize)
{
var padding = writtenSize < 0 ? TarBlock.Size : TarBlock.RemainingBlockSize(writtenSize);
Array.Clear(_buffer, 0, Math.Min(_buffer.Length, padding));
while (padding > 0)
{
var writeCount = Math.Min(_buffer.Length, padding);
_stream.Write(_buffer, 0, writeCount);
padding -= writeCount;
}
}
/// <summary>
/// Moves the <see cref="_stream" /> to the end of the specified <paramref name="entryStream" />.
/// </summary>
/// <param name="entryStream">The entry stream.</param>
private void MoveToEndOfStream(TarEntryStream entryStream)
{
// If previous stream isset, move past it's contents.
if (entryStream == null)
{
return;
}
var length = entryStream.Header.Size ?? 0;
var padding = TarBlock.RemainingBlockSize(length);
var remaining = length - entryStream.PositionInternal + padding;
// Skip remainder and re-align to 512 blocks
for (; remaining > 0; remaining--)
{
_stream.ReadByte();
}
}