33 lines
1.0 KiB
C++
33 lines
1.0 KiB
C++
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/*
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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 2019 Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include "../std.hpp"
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///////////////////////////////////////////////////////////////////////////////
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namespace cruft::hash {
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/// Provide a trivial static mapping from a ValueT to a ResultT.
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///
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/// We guarantee that all outputs are:
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/// * unique
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/// * are unbiased at every bit offset
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///
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/// Specialisations are provided for u08, u16, u32, and u64 outputs with
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/// u08 inputs. If further flexibility is required we can move the
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/// implementation into the header.
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///
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/// \tparam ResultT The output of the 'hash' function.
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/// \tparam WordT The input to the 'hash' function.
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template <typename ResultT, typename WordT = u08>
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class table {
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public:
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ResultT operator() (WordT const) const noexcept;
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};
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}
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