Function unpack_full

cpp/src/arrow/util/bpacking_dispatch_internal.h:42–53

/// bits.
template <typename Uint>
ARROW_FORCE_INLINE void unpack_full(const uint8_t* in, Uint* out, int batch_size) {
  if constexpr (ARROW_LITTLE_ENDIAN == 1) {
    std::memcpy(out, in, batch_size * sizeof(Uint));
  } else {
    using bit_util::FromLittleEndian;
    using util::SafeLoadAs;

    for (int k = 0; k < batch_size; k += 1) {
      out[k] = FromLittleEndian(SafeLoadAs<Uint>(in + (k * sizeof(Uint))));
    }
  }
}

/// Compute the maximum spread in bytes that a packed integer can cover.
///