/// <exception cref="System.IO.IOException"></exception>
internal override void Write(PackOutputStream @out, long pos, int cnt)
{
ByteBuffer s = buffer.Slice();
s.Position((int)(pos - start));
while (0 < cnt)
{
byte[] buf = @out.GetCopyBuffer();
int n = Math.Min(cnt, buf.Length);
s.Get(buf, 0, n);
@out.Write(buf, 0, n);
cnt -= n;
}
}
/// <exception cref="System.IO.IOException"></exception>
internal void CopyPackAsIs(PackFile pack, long length, bool validate, PackOutputStream
@out)
{
MessageDigest md = null;
if (validate)
{
md = Constants.NewMessageDigest();
byte[] buf = @out.GetCopyBuffer();
Pin(pack, 0);
if (window.Copy(0, buf, 0, 12) != 12)
{
pack.SetInvalid();
throw new IOException(JGitText.Get().packfileIsTruncated);
}
md.Update(buf, 0, 12);
}
long position = 12;
long remaining = length - (12 + 20);
while (0 < remaining)
{
Pin(pack, position);
int ptr = (int)(position - window.start);
int n = (int)Math.Min(window.Size() - ptr, remaining);
window.Write(@out, position, n, md);
position += n;
remaining -= n;
}
if (md != null)
{
byte[] buf = new byte[20];
byte[] actHash = md.Digest();
Pin(pack, position);
if (window.Copy(position, buf, 0, 20) != 20)
{
pack.SetInvalid();
throw new IOException(JGitText.Get().packfileIsTruncated);
}
if (!Arrays.Equals(actHash, buf))
{
pack.SetInvalid();
throw new IOException(MessageFormat.Format(JGitText.Get().packfileCorruptionDetected
, pack.GetPackFile().GetPath()));
}
}
}
