| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 #include "UtilityFunctions.hh"
27
28 #include <cstdio>
29 #include <memory>
30
31 #ifdef WIN32
32 # include <direct.h>
33 #else
34 # include <unistd.h>
35 #endif
36
37 //....oooOO0OOooo........oooOO0OOooo........oo
38
39 namespace utility
40 {
41 std::vector<G4String>& Split(const G4String& s
42 {
43 std::stringstream ss(str);
44 std::string item;
45 while (std::getline(ss, item, delim)) {
46 if (!item.empty()) elems.push_back((G4Stri
47 }
48 return elems;
49 }
50
51 std::vector<G4String> Split(const G4String& st
52 {
53 std::vector<G4String> elems;
54 Split(str, delim, elems);
55 return elems;
56 }
57
58 // return element ii
59 G4String Get_seperated_element(const G4String&
60 {
61 G4int delims = 0;
62 G4String ss;
63 for (char c : str) {
64 if (delims > ii) {
65 return ss;
66 }
67 if (c == delim) {
68 delims++;
69 }
70 else if (delims == ii) {
71 ss += c;
72 }
73 }
74 return ss;
75 }
76
77 // return first four strings
78 std::array<G4String, 4> Get_four_elements(cons
79 {
80 G4int delims = 0;
81 std::array<G4String, 4> arr;
82 for (char c : str) {
83 if (delims >= 4) return arr;
84 if (c == delim)
85 delims++;
86 else
87 arr.at(delims) += c;
88 }
89 return arr;
90 }
91
92 G4bool Path_exists(const G4String& fname)
93 {
94 G4bool bool_val = false;
95 if (FILE* file = std::fopen(fname, "r")) {
96 fclose(file);
97 bool_val = true;
98 }
99 return bool_val;
100 }
101
102 // Memory safe multi-platform getcwd
103 // http://stackoverflow.com/questions/2869594/
104 G4String Getcwd()
105 {
106 const size_t chunkSize = 255;
107 const int maxChunks = 10240; // 2550 KiBs o
108
109 char stackBuffer[chunkSize]; // Stack buffe
110 if (::getcwd(stackBuffer, sizeof(stackBuffer
111 if (errno != ERANGE) {
112 // It's not ERANGE, so we don't know how t
113 throw std::runtime_error("Cannot determine
114 // Of course you may choose a different er
115 }
116 // Ok, the stack buffer isn't long enough; f
117 for (int chunks = 2; chunks < maxChunks; chu
118 // With boost use scoped_ptr; in C++0x, us
119 // If you want to be less C++ but more eff
120 // you may want to use realloc
121 std::unique_ptr<char[]> cwd(new char[chunk
122 if (::getcwd(cwd.get(), chunkSize * chunks
123 if (errno != ERANGE) {
124 // It's not ERANGE, so we don't know how
125 throw std::runtime_error("Cannot determi
126 // Of course you may choose a different
127 }
128 }
129 throw std::runtime_error(
130 "Cannot determine the current path; the pa
131 "apparently unreasonably long");
132 }
133
134 G4double Min(const G4ThreeVector& v)
135 {
136 return std::min(std::min(v.x(), v.y()), v.z(
137 }
138 } // namespace utility
139
140 //....oooOO0OOooo........oooOO0OOooo........oo
141