Function SkipNextZeros

cpp/src/arrow/util/bit_run_reader.h:324–352

  }

  void SkipNextZeros() {
    assert(current_num_bits_ == 0);
    while (ARROW_PREDICT_TRUE(remaining_ >= 64)) {
      current_word_ = LoadFullWord();
      const auto num_zeros = CountFirstZeros(current_word_);
      if (num_zeros < 64) {
        // Run of zeros ends here
        current_word_ = ConsumeBits(current_word_, num_zeros);
        current_num_bits_ = 64 - num_zeros;
        remaining_ -= num_zeros;
        assert(remaining_ >= 0);
        assert(current_num_bits_ >= 0);
        return;
      }
      remaining_ -= 64;
    }
    // Run of zeros continues in last bitmap word
    if (remaining_ > 0) {
      current_word_ = LoadPartialWord(/*bit_offset=*/0, remaining_);
      current_num_bits_ = static_cast<int32_t>(remaining_);
      const auto num_zeros =
          std::min<int32_t>(current_num_bits_, CountFirstZeros(current_word_));
      current_word_ = ConsumeBits(current_word_, num_zeros);
      current_num_bits_ -= num_zeros;
      remaining_ -= num_zeros;
      assert(remaining_ >= 0);
      assert(current_num_bits_ >= 0);
    }
  }

  int64_t CountNextOnes() {
    assert(current_word_ & kFirstBit);