65 lines
2.6 KiB
C++
Executable File
65 lines
2.6 KiB
C++
Executable File
/*
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(**************************************************************************)
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(* *)
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(* Schifra *)
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(* Reed-Solomon Error Correcting Code Library *)
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(* *)
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(* Release Version 0.0.1 *)
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(* http://www.schifra.com *)
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(* Copyright (c) 2000-2020 Arash Partow, All Rights Reserved. *)
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(* *)
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(* The Schifra Reed-Solomon error correcting code library and all its *)
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(* components are supplied under the terms of the General Schifra License *)
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(* agreement. The contents of the Schifra Reed-Solomon error correcting *)
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(* code library and all its components may not be copied or disclosed *)
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(* except in accordance with the terms of that agreement. *)
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(* *)
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(* URL: http://www.schifra.com/license.html *)
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(* *)
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(**************************************************************************)
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*/
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#ifndef INCLUDE_SCHIFRA_SEQUENTIAL_ROOT_GENERATOR_POLYNOMIAL_CREATOR_HPP
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#define INCLUDE_SCHIFRA_SEQUENTIAL_ROOT_GENERATOR_POLYNOMIAL_CREATOR_HPP
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#include <cstddef>
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#include "schifra_galois_field.hpp"
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#include "schifra_galois_field_element.hpp"
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#include "schifra_galois_field_polynomial.hpp"
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namespace schifra
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{
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inline bool make_sequential_root_generator_polynomial(const galois::field& field,
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const std::size_t initial_index,
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const std::size_t num_elements,
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galois::field_polynomial& generator_polynomial)
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{
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if (
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(initial_index >= field.size()) ||
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((initial_index + num_elements) > field.size())
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)
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{
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return false;
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}
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galois::field_element alpha(field, 2);
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galois::field_polynomial X = galois::generate_X(field);
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generator_polynomial = galois::field_element(field, 1);
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for (std::size_t i = initial_index; i < (initial_index + num_elements); ++i)
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{
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generator_polynomial *= (X + (alpha ^ static_cast<galois::field_symbol>(i)));
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}
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return true;
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}
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} // namespace schifra
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#endif
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