Gabriele Cosmo
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4FastVector.hh,v 1.3 1999/11/23 15:00:03 gcosmo Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// History: first implementation, based on object model of
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// 2nd December 1995, G.Cosmo
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// ------------------------------------------------------------
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#ifndef G4FastVector_h
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#define G4FastVector_h 1
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#include "globals.hh"
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template <class Type, G4int N>
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class G4FastVector
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{
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// Template class defining a vector of pointers,
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// not performing boundary checking.
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public:
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G4FastVector() { ptr = &theArray[0]; }
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~G4FastVector()
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{
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if (ptr != &theArray[0]) delete [] ptr;
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}
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inline Type* operator[](G4int anIndex) const
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// Access operator to the array.
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{
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return ptr[anIndex];
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}
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void Initialize(G4int items)
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// Normally the pointer ptr points to the stack-array
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// theArray; only when the number of items is greater
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// than N, memory is allocated dynamically.
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{
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if (ptr != &theArray[0])
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delete [] ptr;
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if (items > N)
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ptr = new Type*[items];
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else
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ptr = &theArray[0];
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}
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inline void SetElement(G4int anIndex, Type *anElement)
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// To insert an element at the given position inside
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// the vector.
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{
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ptr[anIndex] = anElement;
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}
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private:
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Type *theArray[N];
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Type **ptr;
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};
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#endif
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