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//
#ifndef MOLECULAR_UTILITY_FUNCTIONS_HH
#define MOLECULAR_UTILITY_FUNCTIONS_HH

#include "G4ThreeVector.hh"
#include "globals.hh"

#include <array>
#include <string>
#include <vector>

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

namespace utility
{
std::vector<G4String>& Split(const G4String&, char, std::vector<G4String>&);

std::vector<G4String> Split(const G4String&, char);

G4String Get_seperated_element(const G4String&, char, G4int);

std::array<G4String, 4> Get_four_elements(const G4String&, char);

G4bool Path_exists(const G4String&);

G4String Getcwd();

G4double Min(const G4ThreeVector&);

// sign function
template<typename T>
[[maybe_unused]] inline constexpr G4int Signum(T, std::false_type);

template<typename T>
inline constexpr int Signum(T, std::true_type);

template<typename T>
inline constexpr int Signum(T);

// find last (highest) significant bit
// linux implementation, copied for portability
// http://lxr.linux.no/#linux+v2.6.26.5/include/asm-generic/bitops/fls.h
static inline int Fls(int x)
{
  int r = 32;

  if (!x) return 0;
  if (!(x & 0xffff0000u)) {
    x <<= 16;
    r -= 16;
  }
  if (!(x & 0xff000000u)) {
    x <<= 8;
    r -= 8;
  }
  if (!(x & 0xf0000000u)) {
    x <<= 4;
    r -= 4;
  }
  if (!(x & 0xc0000000u)) {
    x <<= 2;
    r -= 2;
  }
  if (!(x & 0x80000000u)) {
    x <<= 1;
    r -= 1;
  }
  return r;
}

}  // namespace utility

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

#endif  // MOLECULAR_UTILITY_FUNCTIONS_HH