💿🐜 Antkeeper source code
https://antkeeper.com
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66 lines
1.7 KiB
66 lines
1.7 KiB
/*
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* Copyright (C) 2020 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_GENETIC_OPERATORS_HPP
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#define ANTKEEPER_GENETIC_OPERATORS_HPP
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namespace dna
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{
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/**
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* Performs a genetic crossover on two blocks of interleaved alleles.
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*
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* @param a Interleaved allele block of the first parent.
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* @param b Interleaved allele block of the second parent.
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* @param g Uniform random bit generator.
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* @return Interleaved allele block of the new offspring.
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*/
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template <class T, class URBG>
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T crossover(T a, T b, URBG&& g)
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{
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T c = 0, i = 1;
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do
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{
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c |= (a >> (g() % 2)) & i;
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i <<= 1;
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c |= (b << (g() % 2)) & i;
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i <<= 1;
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}
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while (i);
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return c;
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}
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/**
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* Mutates a single allele in an interleaved allele block.
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*
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* @param x Interleaved allele block to mutate.
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* @param g Uniform random bit generator.
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* @return Mutated copy of @p x.
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*/
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template <class T, class URBG>
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T mutate(T x, URBG&& g)
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{
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return x ^ (T(1) << (g() % (sizeof(T) << 3)));
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}
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} // namespace dna
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#endif // ANTKEEPER_GENETIC_OPERATORS_HPP
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