1 #ifndef __G2_H__
 2 #define __G2_H__
 3 
 4 #include "G.h"
 5 using namespace std;
 6 
 7 class G2: public G {
 8 public:
 9   G2(){};
10 
11  //Create and initialize an element
12   G2(const Pairing &e);
13 
14   //Create an identity or a random element
15   G2(const Pairing &e, bool identity);
16 
17   //Create an element from import 
18   G2(const Pairing &e, const unsigned char *data, 
19      unsigned short len, bool compressed = false, 
20      unsigned short base = 16);
21 
22   //Create an element from hash
23   G2(const Pairing &e, const void *data, 
24      unsigned short len);
25 
26   //Intialize with another element but with different value
27   G2(const G2 &h, bool identity=false):G(h,identity){}
28 
29   //Copy constructor
30   //G2(const G2 &h):G(h){}
31 
32   // Assignment operator 
33   G2& operator=(const G2 &rhs){return (G2&)G::operator=(rhs);}
34 
35   //Arithmetic Assignment Operators
36   G2& operator*=(const G2 &rhs){return (G2&)G::operator*=(rhs);}
37   G2& operator/=(const G2 &rhs){return (G2&)G::operator/=(rhs);}
38   G2& operator^=(const Zr &exp){return (G2&)G::operator^=(exp);}
39 
40   // Non-assignment operators
41   const G2 operator*(const G2 &rhs) const {
42     return G2(*this) *= rhs;
43   }
44   const G2 operator/(const G2 &rhs) const {
45     return G2(*this) /= rhs;
46   }
47 
48   const G2 operator^(const Zr &exp) const {
49     return G2(*this) ^= exp;
50   }
51 
52   bool operator==(const G2 &rhs) const {
53     return G::operator==(rhs);
54   }
55 
56   unsigned short getElementSize(bool compressed) const;
57 
58   string toString(bool compressed) const;
59 
60   const G2 inverse() const{
61     G2 g2;
62     g2.setElement(G::inverse().getElement());
63     return g2;
64   }
65   const G2 square() const{
66     G2 g2;
67     g2.setElement(G::square().getElement());
68     return g2;
69   }
70 };
71 
72 #endif