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G4FastVector.hh
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29 // ------------------------------------------------------------
30 // GEANT 4 class header file
31 //
32 // History: first implementation, based on object model of
33 // 2nd December 1995, G.Cosmo
34 // ------------------------------------------------------------
35 
36 #ifndef G4FastVector_h
37 #define G4FastVector_h 1
38 
39 #include "globals.hh"
40 
41 template <class Type, G4int N>
43 {
44  // Template class defining a vector of pointers,
45  // not performing boundary checking.
46 
47  public:
48 
49  G4FastVector() { ptr = &theArray[0]; }
50 
52  {
53  if (ptr != &theArray[0]) delete [] ptr;
54  }
55 
56  inline Type* operator[](G4int anIndex) const
57  // Access operator to the array.
58  {
59  return ptr[anIndex];
60  }
61 
62  void Initialize(G4int items)
63  // Normally the pointer ptr points to the stack-array
64  // theArray; only when the number of items is greater
65  // than N, memory is allocated dynamically.
66  {
67  if (ptr != &theArray[0])
68  delete [] ptr;
69  if (items > N)
70  ptr = new Type*[items];
71  else
72  ptr = &theArray[0];
73  }
74 
75  inline void SetElement(G4int anIndex, Type *anElement)
76  // To insert an element at the given position inside
77  // the vector.
78  {
79  ptr[anIndex] = anElement;
80  }
81 
82  private:
83 
85  Type **ptr;
86 };
87 
88 #endif
89