eth_pairings_cpp 0.1.1

EIP1962 reference implementation in C++
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72

//
// This file is part of
//
// CTBignum 	
//
// C++ Library for Compile-Time and Run-Time Multi-Precision and Modular Arithmetic
// 
//
// This file is distributed under the Apache License, Version 2.0. See the LICENSE
// file for details.
#ifndef CT_RELATIONAL_HPP
#define CT_RELATIONAL_HPP

#include <ctbignum/addition.hpp>
#include <ctbignum/bigint.hpp>
#include <ctbignum/slicing.hpp>

#include <algorithm>
#include <cstddef>

namespace cbn {
namespace detail {

template <size_t N, typename T>
constexpr bool equal(big_int<N, T> a, big_int<N, T> b) {
  size_t x = 0;
  for (auto i = 0; i < N; ++i)
    x += (a[i] != b[i]);
  return (x == 0);
}

template <size_t N, typename T>
constexpr bool less_than(big_int<N, T> a, big_int<N, T> b) {

  return subtract(a, b)[N];
}
} // end of detail namespace

template <typename T, size_t N1, size_t N2>
constexpr bool operator==(big_int<N1, T> a, big_int<N2, T> b) {
  constexpr auto L = std::max(N1, N2);
  return detail::equal(detail::pad<L - N1>(a), detail::pad<L - N2>(b));
}

template <typename T, size_t N1, size_t N2>
constexpr bool operator!=(big_int<N1, T> a, big_int<N2, T> b) {
  return !(a==b);
}

template <typename T, size_t N1, size_t N2>
constexpr bool operator<(big_int<N1, T> a, big_int<N2, T> b) {
  constexpr auto L = std::max(N1, N2);
  return detail::less_than(detail::pad<L - N1>(a), detail::pad<L - N2>(b));
}

template <typename T, size_t N1, size_t N2>
constexpr bool operator>(big_int<N1, T> a, big_int<N2, T> b) {
  return (b < a);
}

template <typename T, size_t N1, size_t N2>
constexpr bool operator<=(big_int<N1, T> a, big_int<N2, T> b) {
  return !(b < a);
}

template <typename T, size_t N1, size_t N2>
constexpr bool operator>=(big_int<N1, T> a, big_int<N2, T> b) {
  return  !(a < b);
}

}
#endif