Pad
char Pad[4]; /* pad to 64 bits so sizeof() works in all cases */
virtual status_t Pad(int32 size);
fStatus = fWriter->Pad(newBytesWritten - fBytesWritten);
buffer.Pad(sizeof(ifreq) - IF_NAMESIZE - address.ss_len);
buffer.Pad(sizeof(ifreq) - IF_NAMESIZE - length);
return Pad((BytesConsumed() + length - 1) / length - BytesConsumed());
status_t Pad(size_t length);