Function UnpackValues

cpp/src/arrow/util/bpacking_test.cc:67–79

/// Convenience wrapper to unpack into a vector
template <typename Int>
std::vector<Int> UnpackValues(const uint8_t* packed, const UnpackOptions& opts,
                              UnpackFunc<Int> unpack) {
  if constexpr (std::is_same_v<Int, bool>) {
    // Using dynamic array to avoid std::vector<bool>
    auto buffer = std::make_unique<Int[]>(opts.batch_size);
    unpack(packed, buffer.get(), opts);
    return std::vector<Int>(buffer.get(), buffer.get() + opts.batch_size);
  } else {
    std::vector<Int> out(opts.batch_size);
    unpack(packed, out.data(), opts);
    return out;
  }
}

/// Use BitWriter to pack values into a vector.
template <typename Int>