Function SwapByteOrder4

IO/Image/vtkSEPReader.cxx:35–39

static constexpr std::size_t DataFormatSize[] = { 4, 4, 8 };

inline void SwapByteOrder4(char* data)
{
  std::swap(data[0], data[3]);
  std::swap(data[1], data[2]);
}
inline void SwapByteOrder8(char* data)
{
  std::swap(data[0], data[7]);