Method extend

bolt/common/memory/ByteStream.cpp:337–364

}

void ByteOutputStream::extend(int32_t bytes) {
  if (current_ && current_->position != current_->size) {
    LOG(FATAL) << "Extend ByteOutputStream before range full: "
               << current_->position << " vs. " << current_->size;
  }

  // Check if rewriting existing content. If so, move to next range and start at
  // 0.
  if ((current_ != nullptr) && (current_ != &ranges_.back())) {
    ++current_;
    current_->position = 0;
    return;
  }

  ranges_.emplace_back();
  current_ = &ranges_.back();
  lastRangeEnd_ = 0;
  arena_->newRange(
      newRangeSize(bytes),
      ranges_.size() == 1 ? nullptr : &ranges_[ranges_.size() - 2],
      current_);
  allocatedBytes_ += current_->size;
  BOLT_CHECK_GT(allocatedBytes_, 0);
  if (isBits_) {
    // size and position are in units of bits for a bits stream.
    current_->size *= 8;
  }
}

int32_t ByteOutputStream::newRangeSize(int32_t bytes) const {
  const int32_t newSize = allocatedBytes_ + bytes;