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69 lines
1.5 KiB
69 lines
1.5 KiB
/*
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Copyright (c) 2020 tevador <tevador@gmail.com>
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All rights reserved.
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*/
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#pragma once
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#include "galois_field.hpp"
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class gf_elem {
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public:
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static constexpr gf_item size() {
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return gf_2048::size();
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}
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gf_elem() : value_(0)
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{
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}
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gf_elem(gf_item value) : value_(value)
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{
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}
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gf_elem& operator+=(gf_elem x) {
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value_ ^= x.value_;
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return *this;
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}
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gf_elem& operator|=(gf_elem x) {
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value_ |= x.value_;
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return *this;
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}
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gf_elem& operator-=(gf_elem x) {
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value_ ^= x.value_;
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return *this;
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}
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gf_elem& operator*=(gf_elem x) {
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value_ = field.mult(value_, x.value_);
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return *this;
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}
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friend gf_elem operator+(gf_elem left, gf_elem right) {
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left += right;
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return left;
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}
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friend gf_elem operator-(gf_elem left, gf_elem right) {
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left -= right;
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return left;
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}
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friend gf_elem operator*(gf_elem left, gf_elem right) {
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left *= right;
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return left;
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}
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friend bool operator==(gf_elem lhs, gf_elem rhs) {
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return lhs.value_ == rhs.value_;
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}
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friend bool operator!=(gf_elem lhs, gf_elem rhs) {
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return !(lhs == rhs);
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}
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gf_elem& inverse() {
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value_ = field.inverse(value_);
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return *this;
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}
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gf_elem& exp() {
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value_ = field.exp(value_);
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return *this;
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}
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gf_item value() const {
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return value_;
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}
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private:
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static const gf_2048 field;
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gf_item value_;
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};
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