Method GetZigZagVlqInt

cpp/src/arrow/util/bit_stream_utils_internal.h:414–423

template <typename Int>
inline bool BitReader::GetZigZagVlqInt(Int* v) {
  static_assert(std::is_integral_v<Int>);
  static_assert(std::is_signed_v<Int>);

  std::make_unsigned_t<Int> u;
  if (!GetVlqInt(&u)) return false;
  u = (u >> 1) ^ (~(u & 1) + 1);
  *v = ::arrow::util::SafeCopy<Int>(u);
  return true;
}

}  // namespace arrow::bit_util