include/AD/numeric/vector.h

   1 //////////////////////////////////////////////////////////////////////////////
   2 // NOTICE:
   3 //
   4 // ADLib, Prop and their related set of tools and documentation are in the
   5 // public domain.   The author(s) of this software reserve no copyrights on
   6 // the source code and any code generated using the tools.  You are encouraged
   7 // to use ADLib and Prop to develop software, in both academic and commercial
   8 // settings, and are free to incorporate any part of ADLib and Prop into
   9 // your programs.
  10 //
  11 // Although you are under no obligation to do so, we strongly recommend that
  12 // you give away all software developed using our tools.
  13 //
  14 // We also ask that credit be given to us when ADLib and/or Prop are used in
  15 // your programs, and that this notice be preserved intact in all the source
  16 // code.
  17 //
  18 // This software is still under development and we welcome any suggestions
  19 // and help from the users.
  20 //
  21 // Allen Leung
  22 // 1994
  23 //////////////////////////////////////////////////////////////////////////////
  24
  25 #ifndef vector_h
  26 #define vector_h
  27
  28 #include <iostream.h>
  29 #include <AD/generic/generic.h>
  30
  31 template <class T>
  32    class Vector {
  33
  34       int len;      // length of the vector
  35       T * V;        // the vector array
  36
  37    public:
  38       //
  39       // Constructors and destructor
  40       //
  41
  42       Vector() : len(0), V(0) {}
  43       Vector(int arity) : len(arity), V(new T [arity]) {}
  44       Vector(T&);
  45       Vector(T&, T&);
  46       Vector(T&, T&, T&);
  47       Vector(const T [], int arity);
  48       Vector(const Vector&);
  49      ~Vector() { delete [] V; }
  50
  51       //
  52       // Assignment
  53       //
  54
  55       Vector& operator = (const Vector&);
  56
  57       //
  58       // Selectors
  59       //
  60       int length() const           { return len; }
  61       T& operator [] (int i) const { return V[i]; }
  62       T abs() const;
  63
  64       //
  65       // In place vector operations
  66       //
  67       Vector operator - ();
  68       Vector& operator += (const T&);
  69       Vector& operator -= (const T&);
  70       Vector& operator *= (const T&);
  71       Vector& operator /= (const T&);
  72       Vector& operator += (const Vector&);
  73       Vector& operator -= (const Vector&);
  74
  75       //
  76       // Arithmetic operators
  77       //
  78
  79       friend Vector operator + (const Vector&, const Vector&);
  80       friend Vector operator + (const Vector&, const T&);
  81       friend Vector operator + (const T&, const Vector&);
  82       friend Vector operator - (const Vector&, const Vector&);
  83       friend Vector operator - (const Vector&, const T&);
  84       friend Vector operator - (const T&, const Vector&);
  85       friend T operator * (const Vector&, const Vector&); // dot product
  86       friend Vector operator * (const Vector&, const T&);
  87       friend Vector operator * (const T&, const Vector&);
  88       friend Vector operator / (const Vector&, const T&);
  89       Vector cross(const Vector&) const;  // cross product
  90
  91       //
  92       // Comparisons
  93       //
  94
  95       friend Bool operator == (const Vector&, const Vector&);
  96       friend Bool operator != (const Vector& a, const Vector& b)
  97          { return ! (a == b); }
  98
  99       //
 100       // Input and output
 101       //
 102       friend ostream& operator << (ostream&, const Vector&);
 103       friend istream& operator >> (istream&, Vector&);
 104    };
 105
 106 #endif