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62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2014, Howard Hinnant <howard.hinnant@gmail.com>,
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Vinnie Falco <vinnie.falco@gmail.com
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_HASH_SPOOKY_H_INCLUDED
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#define BEAST_HASH_SPOOKY_H_INCLUDED
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#include <beast/hash/endian.h>
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#include <beast/hash/impl/spookyv2.h>
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namespace beast {
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// See http://burtleburtle.net/bob/hash/spooky.html
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class spooky
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{
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private:
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SpookyHash state_;
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public:
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using result_type = std::size_t;
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static beast::endian const endian = beast::endian::native;
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spooky (std::size_t seed1 = 1, std::size_t seed2 = 2) noexcept
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{
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state_.Init (seed1, seed2);
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}
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void
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operator() (void const* key, std::size_t len) noexcept
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{
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state_.Update (key, len);
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}
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explicit
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operator std::size_t() noexcept
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{
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std::uint64_t h1, h2;
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state_.Final (&h1, &h2);
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return static_cast <std::size_t> (h1);
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}
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};
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} // beast
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#endif
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