40 lines
960 B
C++
40 lines
960 B
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include "../types/sized.hpp"
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#include "../view.hpp"
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#include <cstdint>
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#include <cstdlib>
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///////////////////////////////////////////////////////////////////////////////
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namespace cruft::hash {
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template <typename DigestT>
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class fletcher {
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public:
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using digest_t = DigestT;
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using part_t = typename types::sized::bytes<sizeof (digest_t) / 2>::uint;
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fletcher (part_t modulus, part_t a, part_t b);
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digest_t
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operator() (cruft::view<const std::uint8_t*>) const noexcept;
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private:
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struct state_t {
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part_t a, b;
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};
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const digest_t m_modulus;
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const state_t m_initial;
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};
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}
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