Method Seek

tensorflow/core/lib/io/inputbuffer.cc:176–193

}

Status InputBuffer::Seek(int64 position) {
  if (position < 0) {
    return errors::InvalidArgument("Seeking to a negative position: ",
                                   position);
  }
  // Position of the buffer within file.
  const int64 bufpos = file_pos_ - static_cast<int64>(limit_ - buf_);
  if (position >= bufpos && position < file_pos_) {
    // Seeks to somewhere inside the buffer.
    pos_ = buf_ + (position - bufpos);
    DCHECK(pos_ >= buf_ && pos_ < limit_);
  } else {
    // Seeks to somewhere outside.  Discards the buffered data.
    pos_ = limit_ = buf_;
    file_pos_ = position;
  }
  return Status::OK();
}

}  // namespace io
}  // namespace tensorflow