Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/global/management/include/G4FastVector.hh

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
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 25 //
 26 // G4FastVector
 27 //
 28 // Class description:
 29 //
 30 // Template class defining a vector of pointers,
 31 // not performing boundary checking.
 32 
 33 // Author: G.Cosmo, 2 December 1995
 34 //         First implementation, based on object model
 35 // --------------------------------------------------------------------
 36 #ifndef G4FastVector_hh
 37 #define G4FastVector_hh 1
 38 
 39 #include "globals.hh"
 40 
 41 template <class Type, G4int N>
 42 class G4FastVector
 43 {
 44  public:
 45   G4FastVector() { ptr = &theArray[0]; }
 46 
 47   ~G4FastVector()
 48   {
 49     if(ptr != &theArray[0])
 50       delete[] ptr;
 51   }
 52 
 53   inline Type* operator[](G4int anIndex) const
 54   //  Access operator to the array.
 55   {
 56     return ptr[anIndex];
 57   }
 58 
 59   inline void Initialize(G4int items)
 60   //  Normally the pointer ptr points to the stack-array
 61   //  theArray; only when the number of items is greater
 62   //  than N, memory is allocated dynamically.
 63   {
 64     if(ptr != &theArray[0])
 65       delete[] ptr;
 66     if(items > N)
 67       ptr = new Type*[items];
 68     else
 69       ptr = &theArray[0];
 70   }
 71 
 72   inline void SetElement(G4int anIndex, Type* anElement)
 73   //  To insert an element at the given position inside
 74   //  the vector.
 75   {
 76     ptr[anIndex] = anElement;
 77   }
 78 
 79  private:
 80   Type* theArray[N];
 81   Type** ptr;
 82 };
 83 
 84 #endif
 85