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G4FastVector.hh
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27 // $Id: G4FastVector.hh 67970 2013-03-13 10:10:06Z gcosmo $
28 //
29 //
30 // ------------------------------------------------------------
31 // GEANT 4 class header file
32 //
33 // History: first implementation, based on object model of
34 // 2nd December 1995, G.Cosmo
35 // ------------------------------------------------------------
36 
37 #ifndef G4FastVector_h
38 #define G4FastVector_h 1
39 
40 #include "globals.hh"
41 
42 template <class Type, G4int N>
44 {
45  // Template class defining a vector of pointers,
46  // not performing boundary checking.
47 
48  public:
49 
50  G4FastVector() { ptr = &theArray[0]; }
51 
53  {
54  if (ptr != &theArray[0]) delete [] ptr;
55  }
56 
57  inline Type* operator[](G4int anIndex) const
58  // Access operator to the array.
59  {
60  return ptr[anIndex];
61  }
62 
63  void Initialize(G4int items)
64  // Normally the pointer ptr points to the stack-array
65  // theArray; only when the number of items is greater
66  // than N, memory is allocated dynamically.
67  {
68  if (ptr != &theArray[0])
69  delete [] ptr;
70  if (items > N)
71  ptr = new Type*[items];
72  else
73  ptr = &theArray[0];
74  }
75 
76  inline void SetElement(G4int anIndex, Type *anElement)
77  // To insert an element at the given position inside
78  // the vector.
79  {
80  ptr[anIndex] = anElement;
81  }
82 
83  private:
84 
85  Type *theArray[N];
86  Type **ptr;
87 };
88 
89 #endif
90 
void Initialize(G4int items)
Definition: G4FastVector.hh:63
**D E S C R I P T I O N
void SetElement(G4int anIndex, Type *anElement)
Definition: G4FastVector.hh:76
int G4int
Definition: G4Types.hh:78
Type * theArray[N]
Definition: G4FastVector.hh:85
Type * operator[](G4int anIndex) const
Definition: G4FastVector.hh:57