Function LoadFullWord

cpp/src/arrow/util/bit_run_reader.h:293–303

  }

  uint64_t LoadFullWord() {
    uint64_t word;
    if (Reverse) {
      bitmap_ -= 8;
    }
    memcpy(&word, bitmap_, 8);
    if (!Reverse) {
      bitmap_ += 8;
    }
    return bit_util::ToLittleEndian(word);
  }

  uint64_t LoadPartialWord(int8_t bit_offset, int64_t num_bits) {
    assert(num_bits > 0);