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1 //
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25 //
26 //
27 #ifndef MOLECULAR_UTILITY_FUNCTIONS_HH
28 #define MOLECULAR_UTILITY_FUNCTIONS_HH
29
30 #include "G4ThreeVector.hh"
31 #include "globals.hh"
32
33 #include <array>
34 #include <string>
35 #include <vector>
36
37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
38
39 namespace utility
40 {
41 std::vector<G4String>& Split(const G4String&, char, std::vector<G4String>&);
42
43 std::vector<G4String> Split(const G4String&, char);
44
45 G4String Get_seperated_element(const G4String&, char, G4int);
46
47 std::array<G4String, 4> Get_four_elements(const G4String&, char);
48
49 G4bool Path_exists(const G4String&);
50
51 G4String Getcwd();
52
53 G4double Min(const G4ThreeVector&);
54
55 // sign function
56 template<typename T>
57 [[maybe_unused]] inline constexpr G4int Signum(T, std::false_type);
58
59 template<typename T>
60 inline constexpr int Signum(T, std::true_type);
61
62 template<typename T>
63 inline constexpr int Signum(T);
64
65 // find last (highest) significant bit
66 // linux implementation, copied for portability
67 // http://lxr.linux.no/#linux+v2.6.26.5/include/asm-generic/bitops/fls.h
68 static inline int Fls(int x)
69 {
70 int r = 32;
71
72 if (!x) return 0;
73 if (!(x & 0xffff0000u)) {
74 x <<= 16;
75 r -= 16;
76 }
77 if (!(x & 0xff000000u)) {
78 x <<= 8;
79 r -= 8;
80 }
81 if (!(x & 0xf0000000u)) {
82 x <<= 4;
83 r -= 4;
84 }
85 if (!(x & 0xc0000000u)) {
86 x <<= 2;
87 r -= 2;
88 }
89 if (!(x & 0x80000000u)) {
90 x <<= 1;
91 r -= 1;
92 }
93 return r;
94 }
95
96 } // namespace utility
97
98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
99
100 #endif // MOLECULAR_UTILITY_FUNCTIONS_HH
101