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NumVec.hpp
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1 /*
2  Copyright (c) 2012 The Regents of the University of California,
3  through Lawrence Berkeley National Laboratory.
4 
5 Authors: Lexing Ying, Mathias Jacquelin and Lin Lin
6 
7 This file is part of PEXSI. All rights reserved.
8 
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
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12 (1) Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
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15 this list of conditions and the following disclaimer in the documentation
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17 (3) Neither the name of the University of California, Lawrence Berkeley
18 National Laboratory, U.S. Dept. of Energy nor the names of its contributors may
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42  */
46 #ifndef _PEXSI_NUMVEC_HPP_
47 #define _PEXSI_NUMVEC_HPP_
48 
49 #include "environment.hpp"
50 
51 namespace PEXSI{
60  template <class F> class NumVec
61  {
62  protected:
63 
65  inline void allocate(F* data=NULL);
66 
68  inline void deallocate();
69 
71  Int m_;
74  bool owndata_;
75 
77  F* data_;
78 
80  Int bufsize_;
81  public:
82  NumVec(Int m = 0);
83  NumVec(Int m, bool owndata, F* data);
84  NumVec(const NumVec& C);
85  ~NumVec();
86 
87  NumVec& operator=(const NumVec& C);
88 
89  void Resize ( Int m );
90 
91  const F& operator()(Int i) const;
92  F& operator()(Int i);
93  const F& operator[](Int i) const;
94  F& operator[](Int i);
95 
96  bool IsOwnData() const { return owndata_; }
97  F* Data() const { return data_; }
98  Int m () const { return m_; }
99  Int ByteSize() const { return m_*sizeof(F);}
100  };
101 
102  // Commonly used
103  typedef NumVec<bool> BolNumVec;
104  typedef NumVec<Int> IntNumVec;
105  typedef NumVec<Real> DblNumVec;
106  typedef NumVec<Complex> CpxNumVec;
107 
108 
109  // *********************************************************************
110  // Utility functions
111  // *********************************************************************
113  template <class F> inline void SetValue( NumVec<F>& vec, F val );
114 
116  template <class F> inline Real Energy( const NumVec<F>& vec );
117 
118 
119 } // namespace PEXSI
120 
121 #include "NumVec_impl.hpp"
122 
123 #endif // _PEXSI_NUMVEC_HPP_
Numerical vector.
Definition: NumVec.hpp:60
Environmental variables.
void allocate(F *data=NULL)
Helper function allocating the memory pointed by the data_ attribute.
Definition: NumVec_impl.hpp:205
void deallocate()
Helper function freeing memory pointed by the data_ attribute.
Definition: NumVec_impl.hpp:215
Real Energy(const NumMat< F > &M)
Energy computes the L2 norm of a matrix (treated as a vector).
Definition: NumMat_impl.hpp:142
bool owndata_
Whether it owns the data.
Definition: NumVec.hpp:74
void SetValue(NumMat< F > &M, F val)
SetValue sets a numerical matrix to a constant val.
Definition: NumMat_impl.hpp:137
Implementation of Numerical Vector.
F * data_
The pointer for the actual data.
Definition: NumVec.hpp:77
Int bufsize_
The actual storage space allocated.
Definition: NumVec.hpp:80
Int m_
The size of the vector.
Definition: NumVec.hpp:71