Method NullBitmap

cpp/src/arrow/testing/random.cc:200–213

}  // namespace

std::shared_ptr<Buffer> RandomArrayGenerator::NullBitmap(int64_t size,
                                                         double null_probability,
                                                         int64_t alignment,
                                                         MemoryPool* memory_pool) {
  // The bitmap generator does not care about the value distribution since it
  // only calls the GenerateBitmap method.
  using GenOpt = GenerateOptions<int, std::uniform_int_distribution<int>>;

  GenOpt null_gen(seed(), 0, 1, null_probability);
  std::shared_ptr<Buffer> bitmap = *AllocateEmptyBitmap(size, alignment, memory_pool);
  null_gen.GenerateBitmap(bitmap->mutable_data(), size, nullptr);

  return bitmap;
}

std::shared_ptr<Array> RandomArrayGenerator::Boolean(int64_t size,
                                                     double true_probability,